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panda3d/panda/src/tinydisplay/tinyGraphicsStateGuardian.cxx
David Rose 718ab74065 tinydisplay respect color scale
2008-05-07 00:56:00 +00:00

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// Filename: tinyGraphicsStateGuardian.cxx
// Created by: drose (24Apr08)
//
////////////////////////////////////////////////////////////////////
//
// PANDA 3D SOFTWARE
// Copyright (c) 2001 - 2004, Disney Enterprises, Inc. All rights reserved
//
// All use of this software is subject to the terms of the Panda 3d
// Software license. You should have received a copy of this license
// along with this source code; you will also find a current copy of
// the license at http://etc.cmu.edu/panda3d/docs/license/ .
//
// To contact the maintainers of this program write to
// panda3d-general@lists.sourceforge.net .
//
////////////////////////////////////////////////////////////////////
#include "tinyGraphicsStateGuardian.h"
#include "tinyGeomMunger.h"
#include "tinyTextureContext.h"
#include "config_tinydisplay.h"
#include "pStatTimer.h"
#include "geomVertexReader.h"
#include "ambientLight.h"
#include "pointLight.h"
#include "directionalLight.h"
#include "spotlight.h"
#include "bitMask.h"
#include "zgl.h"
#include "zmath.h"
TypeHandle TinyGraphicsStateGuardian::_type_handle;
PStatCollector TinyGraphicsStateGuardian::_vertices_immediate_pcollector("Vertices:Immediate mode");
PStatCollector TinyGraphicsStateGuardian::_draw_transform_pcollector("Draw:Transform");
static const ZB_fillTriangleFunc fill_tri_funcs
[2 /* depth write: zon, zoff */]
[3 /* color write: noblend, blend, nocolor */]
[3 /* alpha test: anone, aless, amore */]
[2 /* depth test: znone, zless */]
[3 /* shading: white, flat, smooth */]
[3 /* texturing: untextured, textured, perspective textured */] = {
{ // depth write zon
{ // color write noblend
{ // alpha test anone
{
{ ZB_fillTriangleFlat_xx_zon_noblend_anone_znone,
ZB_fillTriangleMapping_xx_zon_noblend_anone_znone,
ZB_fillTriangleMappingPerspective_xx_zon_noblend_anone_znone },
{ ZB_fillTriangleFlat_xx_zon_noblend_anone_znone,
ZB_fillTriangleMappingFlat_xx_zon_noblend_anone_znone,
ZB_fillTriangleMappingPerspectiveFlat_xx_zon_noblend_anone_znone },
{ ZB_fillTriangleSmooth_xx_zon_noblend_anone_znone,
ZB_fillTriangleMappingSmooth_xx_zon_noblend_anone_znone,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zon_noblend_anone_znone },
},
{
{ ZB_fillTriangleFlat_xx_zon_noblend_anone_zless,
ZB_fillTriangleMapping_xx_zon_noblend_anone_zless,
ZB_fillTriangleMappingPerspective_xx_zon_noblend_anone_zless },
{ ZB_fillTriangleFlat_xx_zon_noblend_anone_zless,
ZB_fillTriangleMappingFlat_xx_zon_noblend_anone_zless,
ZB_fillTriangleMappingPerspectiveFlat_xx_zon_noblend_anone_zless },
{ ZB_fillTriangleSmooth_xx_zon_noblend_anone_zless,
ZB_fillTriangleMappingSmooth_xx_zon_noblend_anone_zless,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zon_noblend_anone_zless },
},
},
{ // alpha test aless
{
{ ZB_fillTriangleFlat_xx_zon_noblend_aless_znone,
ZB_fillTriangleMapping_xx_zon_noblend_aless_znone,
ZB_fillTriangleMappingPerspective_xx_zon_noblend_aless_znone },
{ ZB_fillTriangleFlat_xx_zon_noblend_aless_znone,
ZB_fillTriangleMappingFlat_xx_zon_noblend_aless_znone,
ZB_fillTriangleMappingPerspectiveFlat_xx_zon_noblend_aless_znone },
{ ZB_fillTriangleSmooth_xx_zon_noblend_aless_znone,
ZB_fillTriangleMappingSmooth_xx_zon_noblend_aless_znone,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zon_noblend_aless_znone },
},
{
{ ZB_fillTriangleFlat_xx_zon_noblend_aless_zless,
ZB_fillTriangleMapping_xx_zon_noblend_aless_zless,
ZB_fillTriangleMappingPerspective_xx_zon_noblend_aless_zless },
{ ZB_fillTriangleFlat_xx_zon_noblend_aless_zless,
ZB_fillTriangleMappingFlat_xx_zon_noblend_aless_zless,
ZB_fillTriangleMappingPerspectiveFlat_xx_zon_noblend_aless_zless },
{ ZB_fillTriangleSmooth_xx_zon_noblend_aless_zless,
ZB_fillTriangleMappingSmooth_xx_zon_noblend_aless_zless,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zon_noblend_aless_zless },
},
},
{ // alpha test amore
{
{ ZB_fillTriangleFlat_xx_zon_noblend_amore_znone,
ZB_fillTriangleMapping_xx_zon_noblend_amore_znone,
ZB_fillTriangleMappingPerspective_xx_zon_noblend_amore_znone },
{ ZB_fillTriangleFlat_xx_zon_noblend_amore_znone,
ZB_fillTriangleMappingFlat_xx_zon_noblend_amore_znone,
ZB_fillTriangleMappingPerspectiveFlat_xx_zon_noblend_amore_znone },
{ ZB_fillTriangleSmooth_xx_zon_noblend_amore_znone,
ZB_fillTriangleMappingSmooth_xx_zon_noblend_amore_znone,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zon_noblend_amore_znone },
},
{
{ ZB_fillTriangleFlat_xx_zon_noblend_amore_zless,
ZB_fillTriangleMapping_xx_zon_noblend_amore_zless,
ZB_fillTriangleMappingPerspective_xx_zon_noblend_amore_zless },
{ ZB_fillTriangleFlat_xx_zon_noblend_amore_zless,
ZB_fillTriangleMappingFlat_xx_zon_noblend_amore_zless,
ZB_fillTriangleMappingPerspectiveFlat_xx_zon_noblend_amore_zless },
{ ZB_fillTriangleSmooth_xx_zon_noblend_amore_zless,
ZB_fillTriangleMappingSmooth_xx_zon_noblend_amore_zless,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zon_noblend_amore_zless },
},
},
},
{ // color write blend
{ // alpha test anone
{
{ ZB_fillTriangleFlat_xx_zon_blend_anone_znone,
ZB_fillTriangleMapping_xx_zon_blend_anone_znone,
ZB_fillTriangleMappingPerspective_xx_zon_blend_anone_znone },
{ ZB_fillTriangleFlat_xx_zon_blend_anone_znone,
ZB_fillTriangleMappingFlat_xx_zon_blend_anone_znone,
ZB_fillTriangleMappingPerspectiveFlat_xx_zon_blend_anone_znone },
{ ZB_fillTriangleSmooth_xx_zon_blend_anone_znone,
ZB_fillTriangleMappingSmooth_xx_zon_blend_anone_znone,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zon_blend_anone_znone },
},
{
{ ZB_fillTriangleFlat_xx_zon_blend_anone_zless,
ZB_fillTriangleMapping_xx_zon_blend_anone_zless,
ZB_fillTriangleMappingPerspective_xx_zon_blend_anone_zless },
{ ZB_fillTriangleFlat_xx_zon_blend_anone_zless,
ZB_fillTriangleMappingFlat_xx_zon_blend_anone_zless,
ZB_fillTriangleMappingPerspectiveFlat_xx_zon_blend_anone_zless },
{ ZB_fillTriangleSmooth_xx_zon_blend_anone_zless,
ZB_fillTriangleMappingSmooth_xx_zon_blend_anone_zless,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zon_blend_anone_zless },
},
},
{ // alpha test aless
{
{ ZB_fillTriangleFlat_xx_zon_blend_aless_znone,
ZB_fillTriangleMapping_xx_zon_blend_aless_znone,
ZB_fillTriangleMappingPerspective_xx_zon_blend_aless_znone },
{ ZB_fillTriangleFlat_xx_zon_blend_aless_znone,
ZB_fillTriangleMappingFlat_xx_zon_blend_aless_znone,
ZB_fillTriangleMappingPerspectiveFlat_xx_zon_blend_aless_znone },
{ ZB_fillTriangleSmooth_xx_zon_blend_aless_znone,
ZB_fillTriangleMappingSmooth_xx_zon_blend_aless_znone,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zon_blend_aless_znone },
},
{
{ ZB_fillTriangleFlat_xx_zon_blend_aless_zless,
ZB_fillTriangleMapping_xx_zon_blend_aless_zless,
ZB_fillTriangleMappingPerspective_xx_zon_blend_aless_zless },
{ ZB_fillTriangleFlat_xx_zon_blend_aless_zless,
ZB_fillTriangleMappingFlat_xx_zon_blend_aless_zless,
ZB_fillTriangleMappingPerspectiveFlat_xx_zon_blend_aless_zless },
{ ZB_fillTriangleSmooth_xx_zon_blend_aless_zless,
ZB_fillTriangleMappingSmooth_xx_zon_blend_aless_zless,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zon_blend_aless_zless },
},
},
{ // alpha test amore
{
{ ZB_fillTriangleFlat_xx_zon_blend_amore_znone,
ZB_fillTriangleMapping_xx_zon_blend_amore_znone,
ZB_fillTriangleMappingPerspective_xx_zon_blend_amore_znone },
{ ZB_fillTriangleFlat_xx_zon_blend_amore_znone,
ZB_fillTriangleMappingFlat_xx_zon_blend_amore_znone,
ZB_fillTriangleMappingPerspectiveFlat_xx_zon_blend_amore_znone },
{ ZB_fillTriangleSmooth_xx_zon_blend_amore_znone,
ZB_fillTriangleMappingSmooth_xx_zon_blend_amore_znone,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zon_blend_amore_znone },
},
{
{ ZB_fillTriangleFlat_xx_zon_blend_amore_zless,
ZB_fillTriangleMapping_xx_zon_blend_amore_zless,
ZB_fillTriangleMappingPerspective_xx_zon_blend_amore_zless },
{ ZB_fillTriangleFlat_xx_zon_blend_amore_zless,
ZB_fillTriangleMappingFlat_xx_zon_blend_amore_zless,
ZB_fillTriangleMappingPerspectiveFlat_xx_zon_blend_amore_zless },
{ ZB_fillTriangleSmooth_xx_zon_blend_amore_zless,
ZB_fillTriangleMappingSmooth_xx_zon_blend_amore_zless,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zon_blend_amore_zless },
},
},
},
{ // color write nocolor
{ // alpha test anone
{
{ ZB_fillTriangleFlat_xx_zon_nocolor_anone_znone,
ZB_fillTriangleMapping_xx_zon_nocolor_anone_znone,
ZB_fillTriangleMappingPerspective_xx_zon_nocolor_anone_znone },
{ ZB_fillTriangleFlat_xx_zon_nocolor_anone_znone,
ZB_fillTriangleMappingFlat_xx_zon_nocolor_anone_znone,
ZB_fillTriangleMappingPerspectiveFlat_xx_zon_nocolor_anone_znone },
{ ZB_fillTriangleSmooth_xx_zon_nocolor_anone_znone,
ZB_fillTriangleMappingSmooth_xx_zon_nocolor_anone_znone,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zon_nocolor_anone_znone },
},
{
{ ZB_fillTriangleFlat_xx_zon_nocolor_anone_zless,
ZB_fillTriangleMapping_xx_zon_nocolor_anone_zless,
ZB_fillTriangleMappingPerspective_xx_zon_nocolor_anone_zless },
{ ZB_fillTriangleFlat_xx_zon_nocolor_anone_zless,
ZB_fillTriangleMappingFlat_xx_zon_nocolor_anone_zless,
ZB_fillTriangleMappingPerspectiveFlat_xx_zon_nocolor_anone_zless },
{ ZB_fillTriangleSmooth_xx_zon_nocolor_anone_zless,
ZB_fillTriangleMappingSmooth_xx_zon_nocolor_anone_zless,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zon_nocolor_anone_zless },
},
},
{ // alpha test aless
{
{ ZB_fillTriangleFlat_xx_zon_nocolor_aless_znone,
ZB_fillTriangleMapping_xx_zon_nocolor_aless_znone,
ZB_fillTriangleMappingPerspective_xx_zon_nocolor_aless_znone },
{ ZB_fillTriangleFlat_xx_zon_nocolor_aless_znone,
ZB_fillTriangleMappingFlat_xx_zon_nocolor_aless_znone,
ZB_fillTriangleMappingPerspectiveFlat_xx_zon_nocolor_aless_znone },
{ ZB_fillTriangleSmooth_xx_zon_nocolor_aless_znone,
ZB_fillTriangleMappingSmooth_xx_zon_nocolor_aless_znone,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zon_nocolor_aless_znone },
},
{
{ ZB_fillTriangleFlat_xx_zon_nocolor_aless_zless,
ZB_fillTriangleMapping_xx_zon_nocolor_aless_zless,
ZB_fillTriangleMappingPerspective_xx_zon_nocolor_aless_zless },
{ ZB_fillTriangleFlat_xx_zon_nocolor_aless_zless,
ZB_fillTriangleMappingFlat_xx_zon_nocolor_aless_zless,
ZB_fillTriangleMappingPerspectiveFlat_xx_zon_nocolor_aless_zless },
{ ZB_fillTriangleSmooth_xx_zon_nocolor_aless_zless,
ZB_fillTriangleMappingSmooth_xx_zon_nocolor_aless_zless,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zon_nocolor_aless_zless },
},
},
{ // alpha test amore
{
{ ZB_fillTriangleFlat_xx_zon_nocolor_amore_znone,
ZB_fillTriangleMapping_xx_zon_nocolor_amore_znone,
ZB_fillTriangleMappingPerspective_xx_zon_nocolor_amore_znone },
{ ZB_fillTriangleFlat_xx_zon_nocolor_amore_znone,
ZB_fillTriangleMappingFlat_xx_zon_nocolor_amore_znone,
ZB_fillTriangleMappingPerspectiveFlat_xx_zon_nocolor_amore_znone },
{ ZB_fillTriangleSmooth_xx_zon_nocolor_amore_znone,
ZB_fillTriangleMappingSmooth_xx_zon_nocolor_amore_znone,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zon_nocolor_amore_znone },
},
{
{ ZB_fillTriangleFlat_xx_zon_nocolor_amore_zless,
ZB_fillTriangleMapping_xx_zon_nocolor_amore_zless,
ZB_fillTriangleMappingPerspective_xx_zon_nocolor_amore_zless },
{ ZB_fillTriangleFlat_xx_zon_nocolor_amore_zless,
ZB_fillTriangleMappingFlat_xx_zon_nocolor_amore_zless,
ZB_fillTriangleMappingPerspectiveFlat_xx_zon_nocolor_amore_zless },
{ ZB_fillTriangleSmooth_xx_zon_nocolor_amore_zless,
ZB_fillTriangleMappingSmooth_xx_zon_nocolor_amore_zless,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zon_nocolor_amore_zless },
},
},
},
},
{ // depth write zoff
{ // color write noblend
{ // alpha test anone
{
{ ZB_fillTriangleFlat_xx_zoff_noblend_anone_znone,
ZB_fillTriangleMapping_xx_zoff_noblend_anone_znone,
ZB_fillTriangleMappingPerspective_xx_zoff_noblend_anone_znone },
{ ZB_fillTriangleFlat_xx_zoff_noblend_anone_znone,
ZB_fillTriangleMappingFlat_xx_zoff_noblend_anone_znone,
ZB_fillTriangleMappingPerspectiveFlat_xx_zoff_noblend_anone_znone },
{ ZB_fillTriangleSmooth_xx_zoff_noblend_anone_znone,
ZB_fillTriangleMappingSmooth_xx_zoff_noblend_anone_znone,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zoff_noblend_anone_znone },
},
{
{ ZB_fillTriangleFlat_xx_zoff_noblend_anone_zless,
ZB_fillTriangleMapping_xx_zoff_noblend_anone_zless,
ZB_fillTriangleMappingPerspective_xx_zoff_noblend_anone_zless },
{ ZB_fillTriangleFlat_xx_zoff_noblend_anone_zless,
ZB_fillTriangleMappingFlat_xx_zoff_noblend_anone_zless,
ZB_fillTriangleMappingPerspectiveFlat_xx_zoff_noblend_anone_zless },
{ ZB_fillTriangleSmooth_xx_zoff_noblend_anone_zless,
ZB_fillTriangleMappingSmooth_xx_zoff_noblend_anone_zless,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zoff_noblend_anone_zless },
},
},
{ // alpha test aless
{
{ ZB_fillTriangleFlat_xx_zoff_noblend_aless_znone,
ZB_fillTriangleMapping_xx_zoff_noblend_aless_znone,
ZB_fillTriangleMappingPerspective_xx_zoff_noblend_aless_znone },
{ ZB_fillTriangleFlat_xx_zoff_noblend_aless_znone,
ZB_fillTriangleMappingFlat_xx_zoff_noblend_aless_znone,
ZB_fillTriangleMappingPerspectiveFlat_xx_zoff_noblend_aless_znone },
{ ZB_fillTriangleSmooth_xx_zoff_noblend_aless_znone,
ZB_fillTriangleMappingSmooth_xx_zoff_noblend_aless_znone,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zoff_noblend_aless_znone },
},
{
{ ZB_fillTriangleFlat_xx_zoff_noblend_aless_zless,
ZB_fillTriangleMapping_xx_zoff_noblend_aless_zless,
ZB_fillTriangleMappingPerspective_xx_zoff_noblend_aless_zless },
{ ZB_fillTriangleFlat_xx_zoff_noblend_aless_zless,
ZB_fillTriangleMappingFlat_xx_zoff_noblend_aless_zless,
ZB_fillTriangleMappingPerspectiveFlat_xx_zoff_noblend_aless_zless },
{ ZB_fillTriangleSmooth_xx_zoff_noblend_aless_zless,
ZB_fillTriangleMappingSmooth_xx_zoff_noblend_aless_zless,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zoff_noblend_aless_zless },
},
},
{ // alpha test amore
{
{ ZB_fillTriangleFlat_xx_zoff_noblend_amore_znone,
ZB_fillTriangleMapping_xx_zoff_noblend_amore_znone,
ZB_fillTriangleMappingPerspective_xx_zoff_noblend_amore_znone },
{ ZB_fillTriangleFlat_xx_zoff_noblend_amore_znone,
ZB_fillTriangleMappingFlat_xx_zoff_noblend_amore_znone,
ZB_fillTriangleMappingPerspectiveFlat_xx_zoff_noblend_amore_znone },
{ ZB_fillTriangleSmooth_xx_zoff_noblend_amore_znone,
ZB_fillTriangleMappingSmooth_xx_zoff_noblend_amore_znone,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zoff_noblend_amore_znone },
},
{
{ ZB_fillTriangleFlat_xx_zoff_noblend_amore_zless,
ZB_fillTriangleMapping_xx_zoff_noblend_amore_zless,
ZB_fillTriangleMappingPerspective_xx_zoff_noblend_amore_zless },
{ ZB_fillTriangleFlat_xx_zoff_noblend_amore_zless,
ZB_fillTriangleMappingFlat_xx_zoff_noblend_amore_zless,
ZB_fillTriangleMappingPerspectiveFlat_xx_zoff_noblend_amore_zless },
{ ZB_fillTriangleSmooth_xx_zoff_noblend_amore_zless,
ZB_fillTriangleMappingSmooth_xx_zoff_noblend_amore_zless,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zoff_noblend_amore_zless },
},
},
},
{ // color write blend
{ // alpha test anone
{
{ ZB_fillTriangleFlat_xx_zoff_blend_anone_znone,
ZB_fillTriangleMapping_xx_zoff_blend_anone_znone,
ZB_fillTriangleMappingPerspective_xx_zoff_blend_anone_znone },
{ ZB_fillTriangleFlat_xx_zoff_blend_anone_znone,
ZB_fillTriangleMappingFlat_xx_zoff_blend_anone_znone,
ZB_fillTriangleMappingPerspectiveFlat_xx_zoff_blend_anone_znone },
{ ZB_fillTriangleSmooth_xx_zoff_blend_anone_znone,
ZB_fillTriangleMappingSmooth_xx_zoff_blend_anone_znone,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zoff_blend_anone_znone },
},
{
{ ZB_fillTriangleFlat_xx_zoff_blend_anone_zless,
ZB_fillTriangleMapping_xx_zoff_blend_anone_zless,
ZB_fillTriangleMappingPerspective_xx_zoff_blend_anone_zless },
{ ZB_fillTriangleFlat_xx_zoff_blend_anone_zless,
ZB_fillTriangleMappingFlat_xx_zoff_blend_anone_zless,
ZB_fillTriangleMappingPerspectiveFlat_xx_zoff_blend_anone_zless },
{ ZB_fillTriangleSmooth_xx_zoff_blend_anone_zless,
ZB_fillTriangleMappingSmooth_xx_zoff_blend_anone_zless,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zoff_blend_anone_zless },
},
},
{ // alpha test aless
{
{ ZB_fillTriangleFlat_xx_zoff_blend_aless_znone,
ZB_fillTriangleMapping_xx_zoff_blend_aless_znone,
ZB_fillTriangleMappingPerspective_xx_zoff_blend_aless_znone },
{ ZB_fillTriangleFlat_xx_zoff_blend_aless_znone,
ZB_fillTriangleMappingFlat_xx_zoff_blend_aless_znone,
ZB_fillTriangleMappingPerspectiveFlat_xx_zoff_blend_aless_znone },
{ ZB_fillTriangleSmooth_xx_zoff_blend_aless_znone,
ZB_fillTriangleMappingSmooth_xx_zoff_blend_aless_znone,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zoff_blend_aless_znone },
},
{
{ ZB_fillTriangleFlat_xx_zoff_blend_aless_zless,
ZB_fillTriangleMapping_xx_zoff_blend_aless_zless,
ZB_fillTriangleMappingPerspective_xx_zoff_blend_aless_zless },
{ ZB_fillTriangleFlat_xx_zoff_blend_aless_zless,
ZB_fillTriangleMappingFlat_xx_zoff_blend_aless_zless,
ZB_fillTriangleMappingPerspectiveFlat_xx_zoff_blend_aless_zless },
{ ZB_fillTriangleSmooth_xx_zoff_blend_aless_zless,
ZB_fillTriangleMappingSmooth_xx_zoff_blend_aless_zless,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zoff_blend_aless_zless },
},
},
{ // alpha test amore
{
{ ZB_fillTriangleFlat_xx_zoff_blend_amore_znone,
ZB_fillTriangleMapping_xx_zoff_blend_amore_znone,
ZB_fillTriangleMappingPerspective_xx_zoff_blend_amore_znone },
{ ZB_fillTriangleFlat_xx_zoff_blend_amore_znone,
ZB_fillTriangleMappingFlat_xx_zoff_blend_amore_znone,
ZB_fillTriangleMappingPerspectiveFlat_xx_zoff_blend_amore_znone },
{ ZB_fillTriangleSmooth_xx_zoff_blend_amore_znone,
ZB_fillTriangleMappingSmooth_xx_zoff_blend_amore_znone,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zoff_blend_amore_znone },
},
{
{ ZB_fillTriangleFlat_xx_zoff_blend_amore_zless,
ZB_fillTriangleMapping_xx_zoff_blend_amore_zless,
ZB_fillTriangleMappingPerspective_xx_zoff_blend_amore_zless },
{ ZB_fillTriangleFlat_xx_zoff_blend_amore_zless,
ZB_fillTriangleMappingFlat_xx_zoff_blend_amore_zless,
ZB_fillTriangleMappingPerspectiveFlat_xx_zoff_blend_amore_zless },
{ ZB_fillTriangleSmooth_xx_zoff_blend_amore_zless,
ZB_fillTriangleMappingSmooth_xx_zoff_blend_amore_zless,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zoff_blend_amore_zless },
},
},
},
{ // color write nocolor
{ // alpha test anone
{
{ ZB_fillTriangleFlat_xx_zoff_nocolor_anone_znone,
ZB_fillTriangleMapping_xx_zoff_nocolor_anone_znone,
ZB_fillTriangleMappingPerspective_xx_zoff_nocolor_anone_znone },
{ ZB_fillTriangleFlat_xx_zoff_nocolor_anone_znone,
ZB_fillTriangleMappingFlat_xx_zoff_nocolor_anone_znone,
ZB_fillTriangleMappingPerspectiveFlat_xx_zoff_nocolor_anone_znone },
{ ZB_fillTriangleSmooth_xx_zoff_nocolor_anone_znone,
ZB_fillTriangleMappingSmooth_xx_zoff_nocolor_anone_znone,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zoff_nocolor_anone_znone },
},
{
{ ZB_fillTriangleFlat_xx_zoff_nocolor_anone_zless,
ZB_fillTriangleMapping_xx_zoff_nocolor_anone_zless,
ZB_fillTriangleMappingPerspective_xx_zoff_nocolor_anone_zless },
{ ZB_fillTriangleFlat_xx_zoff_nocolor_anone_zless,
ZB_fillTriangleMappingFlat_xx_zoff_nocolor_anone_zless,
ZB_fillTriangleMappingPerspectiveFlat_xx_zoff_nocolor_anone_zless },
{ ZB_fillTriangleSmooth_xx_zoff_nocolor_anone_zless,
ZB_fillTriangleMappingSmooth_xx_zoff_nocolor_anone_zless,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zoff_nocolor_anone_zless },
},
},
{ // alpha test aless
{
{ ZB_fillTriangleFlat_xx_zoff_nocolor_aless_znone,
ZB_fillTriangleMapping_xx_zoff_nocolor_aless_znone,
ZB_fillTriangleMappingPerspective_xx_zoff_nocolor_aless_znone },
{ ZB_fillTriangleFlat_xx_zoff_nocolor_aless_znone,
ZB_fillTriangleMappingFlat_xx_zoff_nocolor_aless_znone,
ZB_fillTriangleMappingPerspectiveFlat_xx_zoff_nocolor_aless_znone },
{ ZB_fillTriangleSmooth_xx_zoff_nocolor_aless_znone,
ZB_fillTriangleMappingSmooth_xx_zoff_nocolor_aless_znone,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zoff_nocolor_aless_znone },
},
{
{ ZB_fillTriangleFlat_xx_zoff_nocolor_aless_zless,
ZB_fillTriangleMapping_xx_zoff_nocolor_aless_zless,
ZB_fillTriangleMappingPerspective_xx_zoff_nocolor_aless_zless },
{ ZB_fillTriangleFlat_xx_zoff_nocolor_aless_zless,
ZB_fillTriangleMappingFlat_xx_zoff_nocolor_aless_zless,
ZB_fillTriangleMappingPerspectiveFlat_xx_zoff_nocolor_aless_zless },
{ ZB_fillTriangleSmooth_xx_zoff_nocolor_aless_zless,
ZB_fillTriangleMappingSmooth_xx_zoff_nocolor_aless_zless,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zoff_nocolor_aless_zless },
},
},
{ // alpha test amore
{
{ ZB_fillTriangleFlat_xx_zoff_nocolor_amore_znone,
ZB_fillTriangleMapping_xx_zoff_nocolor_amore_znone,
ZB_fillTriangleMappingPerspective_xx_zoff_nocolor_amore_znone },
{ ZB_fillTriangleFlat_xx_zoff_nocolor_amore_znone,
ZB_fillTriangleMappingFlat_xx_zoff_nocolor_amore_znone,
ZB_fillTriangleMappingPerspectiveFlat_xx_zoff_nocolor_amore_znone },
{ ZB_fillTriangleSmooth_xx_zoff_nocolor_amore_znone,
ZB_fillTriangleMappingSmooth_xx_zoff_nocolor_amore_znone,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zoff_nocolor_amore_znone },
},
{
{ ZB_fillTriangleFlat_xx_zoff_nocolor_amore_zless,
ZB_fillTriangleMapping_xx_zoff_nocolor_amore_zless,
ZB_fillTriangleMappingPerspective_xx_zoff_nocolor_amore_zless },
{ ZB_fillTriangleFlat_xx_zoff_nocolor_amore_zless,
ZB_fillTriangleMappingFlat_xx_zoff_nocolor_amore_zless,
ZB_fillTriangleMappingPerspectiveFlat_xx_zoff_nocolor_amore_zless },
{ ZB_fillTriangleSmooth_xx_zoff_nocolor_amore_zless,
ZB_fillTriangleMappingSmooth_xx_zoff_nocolor_amore_zless,
ZB_fillTriangleMappingPerspectiveSmooth_xx_zoff_nocolor_amore_zless },
},
},
},
},
};
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::Constructor
// Access: Public
// Description:
////////////////////////////////////////////////////////////////////
TinyGraphicsStateGuardian::
TinyGraphicsStateGuardian(GraphicsPipe *pipe,
TinyGraphicsStateGuardian *share_with) :
GraphicsStateGuardian(CS_yup_right, pipe),
_textures_lru("textures_lru", td_texture_ram)
{
_c = NULL;
_vertices = NULL;
_vertices_size = 0;
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::Destructor
// Access: Public
// Description:
////////////////////////////////////////////////////////////////////
TinyGraphicsStateGuardian::
~TinyGraphicsStateGuardian() {
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::reset
// Access: Public, Virtual
// Description: Resets all internal state as if the gsg were newly
// created.
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
reset() {
free_pointers();
GraphicsStateGuardian::reset();
if (_c != (GLContext *)NULL) {
glClose(_c);
_c = NULL;
}
_c = (GLContext *)gl_zalloc(sizeof(GLContext));
glInit(_c, _current_frame_buffer);
_c->draw_triangle_front = gl_draw_triangle_fill;
_c->draw_triangle_back = gl_draw_triangle_fill;
_supported_geom_rendering =
Geom::GR_point |
Geom::GR_indexed_other |
Geom::GR_flat_last_vertex;
_max_texture_dimension = (1 << ZB_POINT_ST_FRAC_BITS);
_max_lights = MAX_LIGHTS;
_color_scale_via_lighting = false;
_alpha_scale_via_texture = false;
_runtime_color_scale = true;
// Now that the GSG has been initialized, make it available for
// optimizations.
add_gsg(this);
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::free_pointers
// Access: Protected, Virtual
// Description: Frees some memory that was explicitly allocated
// within the glgsg.
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
free_pointers() {
if (_vertices != (GLVertex *)NULL) {
PANDA_FREE_ARRAY(_vertices);
_vertices = NULL;
}
_vertices_size = 0;
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::close_gsg
// Access: Protected, Virtual
// Description: This is called by the associated GraphicsWindow when
// close_window() is called. It should null out the
// _win pointer and possibly free any open resources
// associated with the GSG.
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
close_gsg() {
GraphicsStateGuardian::close_gsg();
if (_c != (GLContext *)NULL) {
glClose(_c);
_c = NULL;
}
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::depth_offset_decals
// Access: Public, Virtual
// Description: Returns true if this GSG can implement decals using a
// DepthOffsetAttrib, or false if that is unreliable
// and the three-step rendering process should be used
// instead.
////////////////////////////////////////////////////////////////////
bool TinyGraphicsStateGuardian::
depth_offset_decals() {
return false;
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::make_geom_munger
// Access: Public, Virtual
// Description: Creates a new GeomMunger object to munge vertices
// appropriate to this GSG for the indicated state.
////////////////////////////////////////////////////////////////////
PT(GeomMunger) TinyGraphicsStateGuardian::
make_geom_munger(const RenderState *state, Thread *current_thread) {
PT(TinyGeomMunger) munger = new TinyGeomMunger(this, state);
return GeomMunger::register_munger(munger, current_thread);
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::clear
// Access: Public
// Description: Clears the framebuffer within the current
// DisplayRegion, according to the flags indicated by
// the given DrawableRegion object.
//
// This does not set the DisplayRegion first. You
// should call prepare_display_region() to specify the
// region you wish the clear operation to apply to.
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
clear(DrawableRegion *clearable) {
PStatTimer timer(_clear_pcollector);
if ((!clearable->get_clear_color_active())&&
(!clearable->get_clear_depth_active())&&
(!clearable->get_clear_stencil_active())) {
return;
}
set_state_and_transform(RenderState::make_empty(), _internal_transform);
bool clear_color = false;
int r, g, b, a;
if (clearable->get_clear_color_active()) {
Colorf v = clearable->get_clear_color();
r = (int)(v[0] * 0xffff);
g = (int)(v[1] * 0xffff);
b = (int)(v[2] * 0xffff);
a = (int)(v[3] * 0xffff);
clear_color = true;
}
bool clear_z = false;
int z;
if (clearable->get_clear_depth_active()) {
// We ignore the specified depth clear value, since we don't
// support alternate depth compare functions anyway.
z = 0;
clear_z = true;
}
ZB_clear_viewport(_c->zb, clear_z, z,
clear_color, r, g, b, a,
_c->viewport.xmin, _c->viewport.ymin,
_c->viewport.xsize, _c->viewport.ysize);
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::prepare_display_region
// Access: Public, Virtual
// Description: Prepare a display region for rendering (set up
// scissor region and viewport)
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
prepare_display_region(DisplayRegionPipelineReader *dr,
Lens::StereoChannel stereo_channel) {
nassertv(dr != (DisplayRegionPipelineReader *)NULL);
GraphicsStateGuardian::prepare_display_region(dr, stereo_channel);
int xmin, ymin, xsize, ysize;
dr->get_region_pixels_i(xmin, ymin, xsize, ysize);
_c->viewport.xmin = xmin;
_c->viewport.ymin = ymin;
_c->viewport.xsize = xsize;
_c->viewport.ysize = ysize;
gl_eval_viewport(_c);
GLViewport *v = &_c->viewport;
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::calc_projection_mat
// Access: Public, Virtual
// Description: Given a lens, calculates the appropriate projection
// matrix for use with this gsg. Note that the
// projection matrix depends a lot upon the coordinate
// system of the rendering API.
//
// The return value is a TransformState if the lens is
// acceptable, NULL if it is not.
////////////////////////////////////////////////////////////////////
CPT(TransformState) TinyGraphicsStateGuardian::
calc_projection_mat(const Lens *lens) {
if (lens == (Lens *)NULL) {
return NULL;
}
if (!lens->is_linear()) {
return NULL;
}
// The projection matrix must always be right-handed Y-up, even if
// our coordinate system of choice is otherwise, because certain GL
// calls (specifically glTexGen(GL_SPHERE_MAP)) assume this kind of
// a coordinate system. Sigh. In order to implement a Z-up (or
// other arbitrary) coordinate system, we'll use a Y-up projection
// matrix, and store the conversion to our coordinate system of
// choice in the modelview matrix.
LMatrix4f result =
LMatrix4f::convert_mat(CS_yup_right, _current_lens->get_coordinate_system()) *
lens->get_projection_mat(_current_stereo_channel);
if (_scene_setup->get_inverted()) {
// If the scene is supposed to be inverted, then invert the
// projection matrix.
result *= LMatrix4f::scale_mat(1.0f, -1.0f, 1.0f);
}
return TransformState::make_mat(result);
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::prepare_lens
// Access: Public, Virtual
// Description: Makes the current lens (whichever lens was most
// recently specified with set_scene()) active, so
// that it will transform future rendered geometry.
// Normally this is only called from the draw process,
// and usually it is called by set_scene().
//
// The return value is true if the lens is acceptable,
// false if it is not.
////////////////////////////////////////////////////////////////////
bool TinyGraphicsStateGuardian::
prepare_lens() {
_transform_stale = true;
return true;
}
////////////////////////////////////////////////////////////////////
// Function: GraphicsStateGuardian::begin_frame
// Access: Public, Virtual
// Description: Called before each frame is rendered, to allow the
// GSG a chance to do any internal cleanup before
// beginning the frame.
//
// The return value is true if successful (in which case
// the frame will be drawn and end_frame() will be
// called later), or false if unsuccessful (in which
// case nothing will be drawn and end_frame() will not
// be called).
////////////////////////////////////////////////////////////////////
bool TinyGraphicsStateGuardian::
begin_frame(Thread *current_thread) {
if (!GraphicsStateGuardian::begin_frame(current_thread)) {
return false;
}
_c->zb = _current_frame_buffer;
#ifdef DO_PSTATS
_vertices_immediate_pcollector.clear_level();
#endif
return true;
}
////////////////////////////////////////////////////////////////////
// Function: GraphicsStateGuardian::begin_scene
// Access: Public, Virtual
// Description: Called between begin_frame() and end_frame() to mark
// the beginning of drawing commands for a "scene"
// (usually a particular DisplayRegion) within a frame.
// All 3-D drawing commands, except the clear operation,
// must be enclosed within begin_scene() .. end_scene().
//
// The return value is true if successful (in which case
// the scene will be drawn and end_scene() will be
// called later), or false if unsuccessful (in which
// case nothing will be drawn and end_scene() will not
// be called).
////////////////////////////////////////////////////////////////////
bool TinyGraphicsStateGuardian::
begin_scene() {
return GraphicsStateGuardian::begin_scene();
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::end_scene
// Access: Protected, Virtual
// Description: Called between begin_frame() and end_frame() to mark
// the end of drawing commands for a "scene" (usually a
// particular DisplayRegion) within a frame. All 3-D
// drawing commands, except the clear operation, must be
// enclosed within begin_scene() .. end_scene().
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
end_scene() {
GraphicsStateGuardian::end_scene();
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::end_frame
// Access: Public, Virtual
// Description: Called after each frame is rendered, to allow the
// GSG a chance to do any internal cleanup after
// rendering the frame, and before the window flips.
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
end_frame(Thread *current_thread) {
GraphicsStateGuardian::end_frame(current_thread);
// Flush any PCollectors specific to this kind of GSG.
_vertices_immediate_pcollector.flush_level();
// Evict any textures that exceed our texture memory.
_textures_lru.begin_epoch();
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::begin_draw_primitives
// Access: Public, Virtual
// Description: Called before a sequence of draw_primitive()
// functions are called, this should prepare the vertex
// data for rendering. It returns true if the vertices
// are ok, false to abort this group of primitives.
////////////////////////////////////////////////////////////////////
bool TinyGraphicsStateGuardian::
begin_draw_primitives(const GeomPipelineReader *geom_reader,
const GeomMunger *munger,
const GeomVertexDataPipelineReader *data_reader,
bool force) {
#ifndef NDEBUG
if (tinydisplay_cat.is_spam()) {
tinydisplay_cat.spam() << "begin_draw_primitives: " << *(data_reader->get_object()) << "\n";
}
#endif // NDEBUG
if (!GraphicsStateGuardian::begin_draw_primitives(geom_reader, munger, data_reader, force)) {
return false;
}
nassertr(_data_reader != (GeomVertexDataPipelineReader *)NULL, false);
PStatTimer timer(_draw_transform_pcollector);
// Set up the proper transform.
if (_data_reader->is_vertex_transformed()) {
// If the vertex data claims to be already transformed into clip
// coordinates, wipe out the current projection and modelview
// matrix (so we don't attempt to transform it again).
const TransformState *ident = TransformState::make_identity();
load_matrix(&_c->matrix_model_view, ident);
load_matrix(&_c->matrix_projection, ident);
load_matrix(&_c->matrix_model_view_inv, ident);
load_matrix(&_c->matrix_model_projection, ident);
_c->matrix_model_projection_no_w_transform = 1;
_transform_stale = true;
} else if (_transform_stale) {
// Load the actual transform.
if (_c->lighting_enabled) {
// With the lighting equation, we need to keep the modelview and
// projection matrices separate.
load_matrix(&_c->matrix_model_view, _internal_transform);
load_matrix(&_c->matrix_projection, _projection_mat);
/* precompute inverse modelview */
M4 tmp;
gl_M4_Inv(&tmp, &_c->matrix_model_view);
gl_M4_Transpose(&_c->matrix_model_view_inv, &tmp);
}
// Compose the modelview and projection matrices.
load_matrix(&_c->matrix_model_projection,
_projection_mat->compose(_internal_transform));
/* test to accelerate computation */
_c->matrix_model_projection_no_w_transform = 0;
float *m = &_c->matrix_model_projection.m[0][0];
if (m[12] == 0.0 && m[13] == 0.0 && m[14] == 0.0) {
_c->matrix_model_projection_no_w_transform = 1;
}
_transform_stale = false;
}
// Figure out the subset of vertices we will be using in this
// operation.
int num_vertices = data_reader->get_num_rows();
_min_vertex = num_vertices;
_max_vertex = 0;
int num_prims = geom_reader->get_num_primitives();
int i;
for (i = 0; i < num_prims; ++i) {
CPT(GeomPrimitive) prim = geom_reader->get_primitive(i);
int nv = prim->get_min_vertex();
_min_vertex = min(_min_vertex, nv);
int xv = prim->get_max_vertex();
_max_vertex = max(_max_vertex, xv);
}
if (_min_vertex > _max_vertex) {
return false;
}
// Now copy all of those vertices into our working table,
// transforming into screen space them as we go.
int num_used_vertices = _max_vertex - _min_vertex + 1;
if (_vertices_size < num_used_vertices) {
if (_vertices_size == 0) {
_vertices_size = 1;
}
while (_vertices_size < num_used_vertices) {
_vertices_size *= 2;
}
if (_vertices != (GLVertex *)NULL) {
PANDA_FREE_ARRAY(_vertices);
}
_vertices = (GLVertex *)PANDA_MALLOC_ARRAY(_vertices_size * sizeof(GLVertex));
}
GeomVertexReader rtexcoord, rcolor, rnormal;
// We only support single-texturing, so only bother with the first
// texture stage.
bool needs_texcoord = false;
bool needs_texmat = false;
LMatrix4f texmat;
const InternalName *texcoord_name = InternalName::get_texcoord();
int max_stage_index = _effective_texture->get_num_on_ff_stages();
if (max_stage_index > 0) {
TextureStage *stage = _effective_texture->get_on_ff_stage(0);
rtexcoord = GeomVertexReader(data_reader, stage->get_texcoord_name());
rtexcoord.set_row(_min_vertex);
needs_texcoord = rtexcoord.has_column();
if (needs_texcoord && _target._tex_matrix->has_stage(stage)) {
needs_texmat = true;
texmat = _target._tex_matrix->get_mat(stage);
}
}
bool needs_color = false;
if (_vertex_colors_enabled) {
rcolor = GeomVertexReader(data_reader, InternalName::get_color());
rcolor.set_row(_min_vertex);
needs_color = rcolor.has_column();
}
if (!needs_color) {
const Colorf &d = _scene_graph_color;
const Colorf &s = _current_color_scale;
_c->current_color.X = d[0] * s[0];
_c->current_color.Y = d[1] * s[1];
_c->current_color.Z = d[2] * s[2];
_c->current_color.W = d[3] * s[3];
}
bool needs_normal = false;
if (_c->lighting_enabled) {
rnormal = GeomVertexReader(data_reader, InternalName::get_normal());
rnormal.set_row(_min_vertex);
needs_normal = rnormal.has_column();
}
GeomVertexReader rvertex(data_reader, InternalName::get_vertex());
rvertex.set_row(_min_vertex);
if (!needs_color && _color_material_flags) {
if (_color_material_flags & CMF_ambient) {
_c->materials[0].ambient = _c->current_color;
_c->materials[1].ambient = _c->current_color;
}
if (_color_material_flags & CMF_diffuse) {
_c->materials[0].diffuse = _c->current_color;
_c->materials[1].diffuse = _c->current_color;
}
}
for (i = 0; i < num_used_vertices; ++i) {
GLVertex *v = &_vertices[i];
const LVecBase4f &d = rvertex.get_data4f();
v->coord.X = d[0];
v->coord.Y = d[1];
v->coord.Z = d[2];
v->coord.W = d[3];
if (needs_texmat) {
// Transform texcoords as a four-component vector for most generality.
LVecBase4f d = rtexcoord.get_data4f() * texmat;
v->tex_coord.X = d[0];
v->tex_coord.Y = d[1];
} else if (needs_texcoord) {
// No need to transform, so just extract as two-component.
const LVecBase2f &d = rtexcoord.get_data2f();
v->tex_coord.X = d[0];
v->tex_coord.Y = d[1];
}
if (needs_color) {
const Colorf &d = rcolor.get_data4f();
const Colorf &s = _current_color_scale;
_c->current_color.X = d[0] * s[0];
_c->current_color.Y = d[1] * s[1];
_c->current_color.Z = d[2] * s[2];
_c->current_color.W = d[3] * s[3];
if (_color_material_flags) {
if (_color_material_flags & CMF_ambient) {
_c->materials[0].ambient = _c->current_color;
_c->materials[1].ambient = _c->current_color;
}
if (_color_material_flags & CMF_diffuse) {
_c->materials[0].diffuse = _c->current_color;
_c->materials[1].diffuse = _c->current_color;
}
}
}
v->color = _c->current_color;
if (needs_normal) {
const LVecBase3f &d = rnormal.get_data3f();
_c->current_normal.X = d[0];
_c->current_normal.Y = d[1];
_c->current_normal.Z = d[2];
_c->current_normal.W = 0.0f;
}
gl_vertex_transform(_c, v);
if (_c->lighting_enabled) {
gl_shade_vertex(_c, v);
}
if (v->clip_code == 0) {
gl_transform_to_viewport(_c, v);
}
v->edge_flag = 1;
}
// Set up the appropriate function callback for filling triangles,
// according to the current state.
int depth_write_state = 0;
if (_target._depth_write->get_mode() != DepthWriteAttrib::M_on) {
depth_write_state = 1;
}
int color_write_state = 0;
switch (_target._transparency->get_mode()) {
case TransparencyAttrib::M_alpha:
case TransparencyAttrib::M_dual:
color_write_state = 1;
break;
default:
break;
}
unsigned int color_channels =
_target._color_write->get_channels() & _color_write_mask;
if (color_channels == ColorWriteAttrib::C_off) {
color_write_state = 2;
}
int alpha_test_state = 0;
switch (_target._alpha_test->get_mode()) {
case AlphaTestAttrib::M_none:
case AlphaTestAttrib::M_never:
case AlphaTestAttrib::M_always:
case AlphaTestAttrib::M_equal:
case AlphaTestAttrib::M_not_equal:
alpha_test_state = 0;
break;
case AlphaTestAttrib::M_less:
case AlphaTestAttrib::M_less_equal:
alpha_test_state = 1;
_c->zb->reference_alpha = (unsigned int)_target._alpha_test->get_reference_alpha() * 0xff00;
break;
case AlphaTestAttrib::M_greater:
case AlphaTestAttrib::M_greater_equal:
alpha_test_state = 2;
_c->zb->reference_alpha = (unsigned int)_target._alpha_test->get_reference_alpha() * 0xff00;
break;
}
int depth_test_state = 1;
_c->depth_test = 1; // set this for ZB_line
if (_target._depth_test->get_mode() == DepthTestAttrib::M_none) {
depth_test_state = 0;
_c->depth_test = 0;
}
ShadeModelAttrib::Mode shade_model = _target._shade_model->get_mode();
if (!needs_normal && !needs_color) {
// With no per-vertex lighting, and no per-vertex colors, we might
// as well use the flat shading model.
shade_model = ShadeModelAttrib::M_flat;
}
int shading_state = 2; // smooth
_c->smooth_shade_model = true;
if (shade_model == ShadeModelAttrib::M_flat) {
_c->smooth_shade_model = false;
shading_state = 1; // flat
if (_c->current_color.X == 1.0f &&
_c->current_color.Y == 1.0f &&
_c->current_color.Z == 1.0f &&
_c->current_color.W == 1.0f) {
shading_state = 0; // white
}
}
int texturing_state = 0; // untextured
if (_c->texture_2d_enabled) {
texturing_state = 2; // perspective-correct textures
if (_c->matrix_model_projection_no_w_transform) {
texturing_state = 1; // non-perspective-correct textures
}
}
_c->zb_fill_tri = fill_tri_funcs[depth_write_state][color_write_state][alpha_test_state][depth_test_state][shading_state][texturing_state];
return true;
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::draw_triangles
// Access: Public, Virtual
// Description: Draws a series of disconnected triangles.
////////////////////////////////////////////////////////////////////
bool TinyGraphicsStateGuardian::
draw_triangles(const GeomPrimitivePipelineReader *reader, bool force) {
PStatTimer timer(_draw_primitive_pcollector, reader->get_current_thread());
#ifndef NDEBUG
if (tinydisplay_cat.is_spam()) {
tinydisplay_cat.spam() << "draw_triangles: " << *(reader->get_object()) << "\n";
}
#endif // NDEBUG
int num_vertices = reader->get_num_vertices();
_vertices_immediate_pcollector.add_level(num_vertices);
if (reader->is_indexed()) {
switch (reader->get_index_type()) {
case Geom::NT_uint8:
{
PN_uint8 *index = (PN_uint8 *)reader->get_read_pointer(true);
for (int i = 0; i < num_vertices; i += 3) {
GLVertex *v0 = &_vertices[index[i] - _min_vertex];
GLVertex *v1 = &_vertices[index[i + 1] - _min_vertex];
GLVertex *v2 = &_vertices[index[i + 2] - _min_vertex];
gl_draw_triangle(_c, v0, v1, v2);
}
}
break;
case Geom::NT_uint16:
{
PN_uint16 *index = (PN_uint16 *)reader->get_read_pointer(true);
for (int i = 0; i < num_vertices; i += 3) {
GLVertex *v0 = &_vertices[index[i] - _min_vertex];
GLVertex *v1 = &_vertices[index[i + 1] - _min_vertex];
GLVertex *v2 = &_vertices[index[i + 2] - _min_vertex];
gl_draw_triangle(_c, v0, v1, v2);
}
}
break;
case Geom::NT_uint32:
{
PN_uint32 *index = (PN_uint32 *)reader->get_read_pointer(true);
for (int i = 0; i < num_vertices; i += 3) {
GLVertex *v0 = &_vertices[index[i] - _min_vertex];
GLVertex *v1 = &_vertices[index[i + 1] - _min_vertex];
GLVertex *v2 = &_vertices[index[i + 2] - _min_vertex];
gl_draw_triangle(_c, v0, v1, v2);
}
}
break;
default:
break;
}
} else {
int delta = reader->get_first_vertex() - _min_vertex;
for (int vi = 0; vi < num_vertices; vi += 3) {
GLVertex *v0 = &_vertices[vi + delta];
GLVertex *v1 = &_vertices[vi + delta + 1];
GLVertex *v2 = &_vertices[vi + delta + 2];
gl_draw_triangle(_c, v0, v1, v2);
}
}
return true;
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::draw_lines
// Access: Public, Virtual
// Description: Draws a series of disconnected line segments.
////////////////////////////////////////////////////////////////////
bool TinyGraphicsStateGuardian::
draw_lines(const GeomPrimitivePipelineReader *reader, bool force) {
PStatTimer timer(_draw_primitive_pcollector, reader->get_current_thread());
#ifndef NDEBUG
if (tinydisplay_cat.is_spam()) {
tinydisplay_cat.spam() << "draw_lines: " << *(reader->get_object()) << "\n";
}
#endif // NDEBUG
int num_vertices = reader->get_num_vertices();
_vertices_immediate_pcollector.add_level(num_vertices);
if (reader->is_indexed()) {
switch (reader->get_index_type()) {
case Geom::NT_uint8:
{
PN_uint8 *index = (PN_uint8 *)reader->get_read_pointer(true);
for (int i = 0; i < num_vertices; i += 2) {
GLVertex *v0 = &_vertices[index[i] - _min_vertex];
GLVertex *v1 = &_vertices[index[i + 1] - _min_vertex];
gl_draw_line(_c, v0, v1);
}
}
break;
case Geom::NT_uint16:
{
PN_uint16 *index = (PN_uint16 *)reader->get_read_pointer(true);
for (int i = 0; i < num_vertices; i += 2) {
GLVertex *v0 = &_vertices[index[i] - _min_vertex];
GLVertex *v1 = &_vertices[index[i + 1] - _min_vertex];
gl_draw_line(_c, v0, v1);
}
}
break;
case Geom::NT_uint32:
{
PN_uint32 *index = (PN_uint32 *)reader->get_read_pointer(true);
for (int i = 0; i < num_vertices; i += 2) {
GLVertex *v0 = &_vertices[index[i] - _min_vertex];
GLVertex *v1 = &_vertices[index[i + 1] - _min_vertex];
gl_draw_line(_c, v0, v1);
}
}
break;
default:
break;
}
} else {
int delta = reader->get_first_vertex() - _min_vertex;
for (int vi = 0; vi < num_vertices; vi += 2) {
GLVertex *v0 = &_vertices[vi + delta];
GLVertex *v1 = &_vertices[vi + delta + 1];
gl_draw_line(_c, v0, v1);
}
}
return true;
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::draw_points
// Access: Public, Virtual
// Description: Draws a series of disconnected points.
////////////////////////////////////////////////////////////////////
bool TinyGraphicsStateGuardian::
draw_points(const GeomPrimitivePipelineReader *reader, bool force) {
PStatTimer timer(_draw_primitive_pcollector, reader->get_current_thread());
#ifndef NDEBUG
if (tinydisplay_cat.is_spam()) {
tinydisplay_cat.spam() << "draw_points: " << *(reader->get_object()) << "\n";
}
#endif // NDEBUG
int num_vertices = reader->get_num_vertices();
_vertices_immediate_pcollector.add_level(num_vertices);
if (reader->is_indexed()) {
switch (reader->get_index_type()) {
case Geom::NT_uint8:
{
PN_uint8 *index = (PN_uint8 *)reader->get_read_pointer(true);
for (int i = 0; i < num_vertices; ++i) {
GLVertex *v0 = &_vertices[index[i] - _min_vertex];
gl_draw_point(_c, v0);
}
}
break;
case Geom::NT_uint16:
{
PN_uint16 *index = (PN_uint16 *)reader->get_read_pointer(true);
for (int i = 0; i < num_vertices; ++i) {
GLVertex *v0 = &_vertices[index[i] - _min_vertex];
gl_draw_point(_c, v0);
}
}
break;
case Geom::NT_uint32:
{
PN_uint32 *index = (PN_uint32 *)reader->get_read_pointer(true);
for (int i = 0; i < num_vertices; ++i) {
GLVertex *v0 = &_vertices[index[i] - _min_vertex];
gl_draw_point(_c, v0);
}
}
break;
default:
break;
}
} else {
int delta = reader->get_first_vertex() - _min_vertex;
for (int vi = 0; vi < num_vertices; ++vi) {
GLVertex *v0 = &_vertices[vi + delta];
gl_draw_point(_c, v0);
}
}
return true;
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::end_draw_primitives()
// Access: Public, Virtual
// Description: Called after a sequence of draw_primitive()
// functions are called, this should do whatever cleanup
// is appropriate.
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
end_draw_primitives() {
GraphicsStateGuardian::end_draw_primitives();
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::framebuffer_copy_to_texture
// Access: Public, Virtual
// Description: Copy the pixels within the indicated display
// region from the framebuffer into texture memory.
//
// If z > -1, it is the cube map index into which to
// copy.
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
framebuffer_copy_to_texture(Texture *tex, int z, const DisplayRegion *dr,
const RenderBuffer &rb) {
nassertv(tex != NULL && dr != NULL);
int xo, yo, w, h;
dr->get_region_pixels_i(xo, yo, w, h);
tex->setup_2d_texture(w, h, Texture::T_unsigned_byte, Texture::F_rgba);
TextureContext *tc = tex->prepare_now(get_prepared_objects(), this);
nassertv(tc != (TextureContext *)NULL);
TinyTextureContext *gtc = DCAST(TinyTextureContext, tc);
GLTexture *gltex = gtc->_gltex;
setup_gltex(gltex, tex->get_x_size(), tex->get_y_size());
PIXEL *ip = gltex->pixmap + gltex->xsize * gltex->ysize;
PIXEL *fo = _c->zb->pbuf + xo + yo * _c->zb->linesize / PSZB;
for (int y = 0; y < gltex->ysize; ++y) {
ip -= gltex->xsize;
memcpy(ip, fo, gltex->xsize * PSZB);
fo += _c->zb->linesize / PSZB;
}
gtc->update_data_size_bytes(gltex->xsize * gltex->ysize * 4);
gtc->mark_loaded();
gtc->enqueue_lru(&_textures_lru);
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::framebuffer_copy_to_ram
// Access: Public, Virtual
// Description: Copy the pixels within the indicated display region
// from the framebuffer into system memory, not texture
// memory. Returns true on success, false on failure.
//
// This completely redefines the ram image of the
// indicated texture.
////////////////////////////////////////////////////////////////////
bool TinyGraphicsStateGuardian::
framebuffer_copy_to_ram(Texture *tex, int z, const DisplayRegion *dr,
const RenderBuffer &rb) {
nassertr(tex != NULL && dr != NULL, false);
int xo, yo, w, h;
dr->get_region_pixels_i(xo, yo, w, h);
Texture::TextureType texture_type;
int z_size;
if (z >= 0) {
texture_type = Texture::TT_cube_map;
z_size = 6;
} else {
texture_type = Texture::TT_2d_texture;
z_size = 1;
}
Texture::ComponentType component_type = Texture::T_unsigned_byte;
Texture::Format format = Texture::F_rgba;
if (tex->get_x_size() != w || tex->get_y_size() != h ||
tex->get_z_size() != z_size ||
tex->get_component_type() != component_type ||
tex->get_format() != format ||
tex->get_texture_type() != texture_type) {
// Re-setup the texture; its properties have changed.
tex->setup_texture(texture_type, w, h, z_size,
component_type, format);
}
unsigned char *image_ptr = tex->modify_ram_image();
size_t image_size = tex->get_ram_image_size();
if (z >= 0) {
nassertr(z < tex->get_z_size(), false);
image_size = tex->get_expected_ram_page_size();
image_ptr += z * image_size;
}
PIXEL *ip = (PIXEL *)(image_ptr + image_size);
PIXEL *fo = _c->zb->pbuf + xo + yo * _c->zb->linesize / PSZB;
for (int y = 0; y < h; ++y) {
ip -= w;
memcpy(ip, fo, w * PSZB);
fo += _c->zb->linesize / PSZB;
}
return true;
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::set_state_and_transform
// Access: Public, Virtual
// Description: Simultaneously resets the render state and the
// transform state.
//
// This transform specified is the "internal" net
// transform, already converted into the GSG's internal
// coordinate space by composing it to
// get_cs_transform(). (Previously, this used to be the
// "external" net transform, with the assumption that
// that GSG would convert it internally, but that is no
// longer the case.)
//
// Special case: if (state==NULL), then the target
// state is already stored in _target.
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
set_state_and_transform(const RenderState *target,
const TransformState *transform) {
#ifndef NDEBUG
if (tinydisplay_cat.is_spam()) {
tinydisplay_cat.spam()
<< "Setting GSG state to " << (void *)target << ":\n";
target->write(tinydisplay_cat.spam(false), 2);
}
#endif
_state_pcollector.add_level(1);
PStatTimer timer1(_draw_set_state_pcollector);
if (transform != _internal_transform) {
PStatTimer timer(_draw_set_state_transform_pcollector);
_state_pcollector.add_level(1);
_internal_transform = transform;
do_issue_transform();
}
if (target == _state_rs) {
return;
}
_target_rs = target;
_target.clear_to_defaults();
target->store_into_slots(&_target);
_state_rs = 0;
if (_target._color != _state._color ||
_target._color_scale != _state._color_scale) {
PStatTimer timer(_draw_set_state_color_pcollector);
do_issue_color();
do_issue_color_scale();
_state._color = _target._color;
_state._color_scale = _target._color_scale;
}
if (_target._cull_face != _state._cull_face) {
PStatTimer timer(_draw_set_state_cull_face_pcollector);
do_issue_cull_face();
_state._cull_face = _target._cull_face;
}
if (_target._render_mode != _state._render_mode) {
PStatTimer timer(_draw_set_state_render_mode_pcollector);
do_issue_render_mode();
_state._render_mode = _target._render_mode;
}
if (_target._texture != _state._texture) {
PStatTimer timer(_draw_set_state_texture_pcollector);
determine_effective_texture();
do_issue_texture();
_state._texture = _target._texture;
}
if (_target._material != _state._material) {
PStatTimer timer(_draw_set_state_material_pcollector);
do_issue_material();
_state._material = _target._material;
}
if (_target._light != _state._light) {
PStatTimer timer(_draw_set_state_light_pcollector);
do_issue_light();
_state._light = _target._light;
}
_state_rs = _target_rs;
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::prepare_texture
// Access: Public, Virtual
// Description: Creates whatever structures the GSG requires to
// represent the texture internally, and returns a
// newly-allocated TextureContext object with this data.
// It is the responsibility of the calling function to
// later call release_texture() with this same pointer
// (which will also delete the pointer).
//
// This function should not be called directly to
// prepare a texture. Instead, call Texture::prepare().
////////////////////////////////////////////////////////////////////
TextureContext *TinyGraphicsStateGuardian::
prepare_texture(Texture *tex) {
if (tex->get_texture_type() != Texture::TT_2d_texture) {
tinydisplay_cat.info()
<< "not loading texture " << tex->get_name() << ": "
<< tex->get_texture_type() << "\n";
return NULL;
}
if (tex->get_ram_image_compression() != Texture::CM_off) {
tinydisplay_cat.info()
<< "not loading texture " << tex->get_name() << ": "
<< tex->get_ram_image_compression() << "\n";
return NULL;
}
TinyTextureContext *gtc = new TinyTextureContext(_prepared_objects, tex);
gtc->_gltex = (GLTexture *)gl_zalloc(sizeof(GLTexture));
return gtc;
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::release_texture
// Access: Public, Virtual
// Description: Frees the GL resources previously allocated for the
// texture. This function should never be called
// directly; instead, call Texture::release() (or simply
// let the Texture destruct).
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
release_texture(TextureContext *tc) {
TinyTextureContext *gtc = DCAST(TinyTextureContext, tc);
GLTexture *gltex = gtc->_gltex;
gtc->_gltex = NULL;
if (_c->current_texture == gltex) {
_c->current_texture = NULL;
_c->texture_2d_enabled = false;
}
if (gltex->pixmap != NULL) {
gl_free(gltex->pixmap);
}
gl_free(gltex);
gtc->dequeue_lru();
delete gtc;
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::do_issue_light
// Access: Protected, Virtual
// Description:
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
do_issue_light() {
// Initialize the current ambient light total and newly enabled
// light list
Colorf cur_ambient_light(0.0f, 0.0f, 0.0f, 0.0f);
int num_enabled = 0;
int num_on_lights = 0;
if (display_cat.is_spam()) {
display_cat.spam()
<< "do_issue_light: " << _target._light << "\n";
}
// First, release all of the previously-assigned lights.
_c->lighting_enabled = false;
GLLight *gl_light = _c->first_light;
while (gl_light != (GLLight *)NULL) {
GLLight *next = gl_light->next;
gl_light->next = NULL;
gl_light = next;
}
_c->first_light = NULL;
// Now, assign new lights.
if (_target._light != (LightAttrib *)NULL) {
CPT(LightAttrib) new_light = _target._light->filter_to_max(_max_lights);
if (display_cat.is_spam()) {
new_light->write(display_cat.spam(false), 2);
}
num_on_lights = new_light->get_num_on_lights();
for (int li = 0; li < num_on_lights; li++) {
NodePath light = new_light->get_on_light(li);
nassertv(!light.is_empty());
Light *light_obj = light.node()->as_light();
nassertv(light_obj != (Light *)NULL);
_lighting_enabled = true;
_c->lighting_enabled = true;
if (light_obj->get_type() == AmbientLight::get_class_type()) {
// Accumulate all of the ambient lights together into one.
cur_ambient_light += light_obj->get_color();
} else {
// Other kinds of lights each get their own GLLight object.
nassertv(num_enabled < MAX_LIGHTS);
GLLight *gl_light = &_c->lights[num_enabled];
memset(gl_light, 0, sizeof(GLLight));
gl_light->next = _c->first_light;
_c->first_light = gl_light;
const Colorf &diffuse = light_obj->get_color();
gl_light->diffuse.X = diffuse[0];
gl_light->diffuse.Y = diffuse[1];
gl_light->diffuse.Z = diffuse[2];
gl_light->diffuse.W = diffuse[3];
light_obj->bind(this, light, num_enabled);
num_enabled++;
}
}
}
_c->ambient_light_model.X = cur_ambient_light[0];
_c->ambient_light_model.Y = cur_ambient_light[1];
_c->ambient_light_model.Z = cur_ambient_light[2];
_c->ambient_light_model.W = cur_ambient_light[3];
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::bind_light
// Access: Public, Virtual
// Description: Called the first time a particular light has been
// bound to a given id within a frame, this should set
// up the associated hardware light with the light's
// properties.
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
bind_light(PointLight *light_obj, const NodePath &light, int light_id) {
GLLight *gl_light = _c->first_light;
nassertv(gl_light != (GLLight *)NULL);
const Colorf &specular = light_obj->get_specular_color();
gl_light->specular.X = specular[0];
gl_light->specular.Y = specular[1];
gl_light->specular.Z = specular[2];
gl_light->specular.W = specular[3];
// Position needs to specify x, y, z, and w
// w == 1 implies non-infinite position
CPT(TransformState) render_transform =
_cs_transform->compose(_scene_setup->get_world_transform());
CPT(TransformState) transform = light.get_transform(_scene_setup->get_scene_root().get_parent());
CPT(TransformState) net_transform = render_transform->compose(transform);
LPoint3f pos = light_obj->get_point() * net_transform->get_mat();
gl_light->position.X = pos[0];
gl_light->position.Y = pos[1];
gl_light->position.Z = pos[2];
gl_light->position.W = 1.0f;
// Exponent == 0 implies uniform light distribution
gl_light->spot_exponent = 0.0f;
// Cutoff == 180 means uniform point light source
gl_light->spot_cutoff = 180.0f;
const LVecBase3f &att = light_obj->get_attenuation();
gl_light->attenuation[0] = att[0];
gl_light->attenuation[1] = att[1];
gl_light->attenuation[2] = att[2];
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::bind_light
// Access: Public, Virtual
// Description: Called the first time a particular light has been
// bound to a given id within a frame, this should set
// up the associated hardware light with the light's
// properties.
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
bind_light(DirectionalLight *light_obj, const NodePath &light, int light_id) {
GLLight *gl_light = _c->first_light;
nassertv(gl_light != (GLLight *)NULL);
const Colorf &specular = light_obj->get_specular_color();
gl_light->specular.X = specular[0];
gl_light->specular.Y = specular[1];
gl_light->specular.Z = specular[2];
gl_light->specular.W = specular[3];
// Position needs to specify x, y, z, and w
// w == 0 implies light is at infinity
CPT(TransformState) render_transform =
_cs_transform->compose(_scene_setup->get_world_transform());
CPT(TransformState) transform = light.get_transform(_scene_setup->get_scene_root().get_parent());
CPT(TransformState) net_transform = render_transform->compose(transform);
LVector3f dir = light_obj->get_direction() * net_transform->get_mat();
gl_light->position.X = -dir[0];
gl_light->position.Y = -dir[1];
gl_light->position.Z = -dir[2];
gl_light->position.W = 0.0f;
gl_light->norm_position.X = -dir[0];
gl_light->norm_position.Y = -dir[1];
gl_light->norm_position.Z = -dir[2];
gl_V3_Norm(&gl_light->norm_position);
// Exponent == 0 implies uniform light distribution
gl_light->spot_exponent = 0.0f;
// Cutoff == 180 means uniform point light source
gl_light->spot_cutoff = 180.0f;
// Default attenuation values (only spotlight and point light can
// modify these)
gl_light->attenuation[0] = 1.0f;
gl_light->attenuation[1] = 0.0f;
gl_light->attenuation[2] = 0.0f;
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::bind_light
// Access: Public, Virtual
// Description: Called the first time a particular light has been
// bound to a given id within a frame, this should set
// up the associated hardware light with the light's
// properties.
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
bind_light(Spotlight *light_obj, const NodePath &light, int light_id) {
GLLight *gl_light = _c->first_light;
nassertv(gl_light != (GLLight *)NULL);
const Colorf &specular = light_obj->get_specular_color();
gl_light->specular.X = specular[0];
gl_light->specular.Y = specular[1];
gl_light->specular.Z = specular[2];
gl_light->specular.W = specular[3];
Lens *lens = light_obj->get_lens();
nassertv(lens != (Lens *)NULL);
// Position needs to specify x, y, z, and w
// w == 1 implies non-infinite position
CPT(TransformState) render_transform =
_cs_transform->compose(_scene_setup->get_world_transform());
CPT(TransformState) transform = light.get_transform(_scene_setup->get_scene_root().get_parent());
CPT(TransformState) net_transform = render_transform->compose(transform);
const LMatrix4f &light_mat = net_transform->get_mat();
LPoint3f pos = lens->get_nodal_point() * light_mat;
LVector3f dir = lens->get_view_vector() * light_mat;
gl_light->position.X = pos[0];
gl_light->position.Y = pos[1];
gl_light->position.Z = pos[2];
gl_light->position.W = 1.0f;
gl_light->spot_direction.X = dir[0];
gl_light->spot_direction.Y = dir[1];
gl_light->spot_direction.Z = dir[2];
gl_light->norm_spot_direction.X = dir[0];
gl_light->norm_spot_direction.Y = dir[1];
gl_light->norm_spot_direction.Z = dir[2];
gl_V3_Norm(&gl_light->norm_spot_direction);
gl_light->spot_exponent = light_obj->get_exponent();
gl_light->spot_cutoff = lens->get_hfov() * 0.5f;
const LVecBase3f &att = light_obj->get_attenuation();
gl_light->attenuation[0] = att[0];
gl_light->attenuation[1] = att[1];
gl_light->attenuation[2] = att[2];
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::do_issue_transform
// Access: Protected
// Description: Sends the indicated transform matrix to the graphics
// API to be applied to future vertices.
//
// This transform is the internal_transform, already
// converted into the GSG's internal coordinate system.
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
do_issue_transform() {
_transform_state_pcollector.add_level(1);
_transform_stale = true;
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::do_issue_render_mode
// Access: Protected
// Description:
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
do_issue_render_mode() {
const RenderModeAttrib *attrib = _target._render_mode;
switch (attrib->get_mode()) {
case RenderModeAttrib::M_unchanged:
case RenderModeAttrib::M_filled:
_c->draw_triangle_front = gl_draw_triangle_fill;
_c->draw_triangle_back = gl_draw_triangle_fill;
break;
case RenderModeAttrib::M_wireframe:
_c->draw_triangle_front = gl_draw_triangle_line;
_c->draw_triangle_back = gl_draw_triangle_line;
break;
case RenderModeAttrib::M_point:
_c->draw_triangle_front = gl_draw_triangle_point;
_c->draw_triangle_back = gl_draw_triangle_point;
break;
default:
tinydisplay_cat.error()
<< "Unknown render mode " << (int)attrib->get_mode() << endl;
}
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::do_issue_cull_face
// Access: Protected
// Description:
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
do_issue_cull_face() {
const CullFaceAttrib *attrib = _target._cull_face;
CullFaceAttrib::Mode mode = attrib->get_effective_mode();
switch (mode) {
case CullFaceAttrib::M_cull_none:
_c->cull_face_enabled = false;
break;
case CullFaceAttrib::M_cull_clockwise:
_c->cull_face_enabled = true;
_c->cull_clockwise = true;
break;
case CullFaceAttrib::M_cull_counter_clockwise:
_c->cull_face_enabled = true;
_c->cull_clockwise = false;
break;
default:
tinydisplay_cat.error()
<< "invalid cull face mode " << (int)mode << endl;
break;
}
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::do_issue_material
// Access: Protected
// Description:
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
do_issue_material() {
static Material empty;
const Material *material;
if (_target._material == (MaterialAttrib *)NULL ||
_target._material->is_off()) {
material = &empty;
} else {
material = _target._material->get_material();
}
// Apply the material parameters to the front face.
setup_material(&_c->materials[0], material);
if (material->get_twoside()) {
// Also apply the material parameters to the back face.
setup_material(&_c->materials[1], material);
}
_c->local_light_model = material->get_local();
_c->light_model_two_side = material->get_twoside();
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::do_issue_texture
// Access: Protected
// Description:
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
do_issue_texture() {
_c->texture_2d_enabled = false;
int num_stages = _effective_texture->get_num_on_ff_stages();
if (num_stages == 0) {
// No texturing.
return;
}
nassertv(num_stages == 1);
TextureStage *stage = _effective_texture->get_on_ff_stage(0);
Texture *texture = _effective_texture->get_on_texture(stage);
nassertv(texture != (Texture *)NULL);
TextureContext *tc = texture->prepare_now(_prepared_objects, this);
if (tc == (TextureContext *)NULL) {
// Something wrong with this texture; skip it.
return;
}
// Then, turn on the current texture mode.
apply_texture(tc);
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::apply_texture
// Access: Protected
// Description: Updates TinyGL with the current information for this
// texture, and makes it the current texture available
// for rendering.
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
apply_texture(TextureContext *tc) {
TinyTextureContext *gtc = DCAST(TinyTextureContext, tc);
gtc->set_active(true);
_c->current_texture = gtc->_gltex;
_c->texture_2d_enabled = true;
GLTexture *gltex = gtc->_gltex;
if (gtc->was_image_modified() || gltex->pixmap == NULL) {
// If the texture image was modified, reload the texture.
if (!upload_texture(gtc)) {
_c->texture_2d_enabled = false;
}
gtc->mark_loaded();
}
gtc->enqueue_lru(&_textures_lru);
_c->zb->current_texture.pixmap = gltex->pixmap;
_c->zb->current_texture.s_mask = gltex->s_mask;
_c->zb->current_texture.t_mask = gltex->t_mask;
_c->zb->current_texture.t_shift = gltex->t_shift;
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::upload_texture
// Access: Protected
// Description: Uploads the texture image to TinyGL.
//
// The return value is true if successful, or false if
// the texture has no image.
////////////////////////////////////////////////////////////////////
bool TinyGraphicsStateGuardian::
upload_texture(TinyTextureContext *gtc) {
Texture *tex = gtc->get_texture();
PStatTimer timer(_load_texture_pcollector);
CPTA_uchar src_image = tex->get_ram_image();
if (src_image.is_null()) {
return false;
}
if (tinydisplay_cat.is_debug()) {
tinydisplay_cat.debug()
<< "loading texture " << tex->get_name() << "\n";
}
#ifdef DO_PSTATS
_data_transferred_pcollector.add_level(tex->get_ram_image_size());
#endif
GLTexture *gltex = gtc->_gltex;
setup_gltex(gltex, tex->get_x_size(), tex->get_y_size());
switch (tex->get_format()) {
case Texture::F_rgb:
case Texture::F_rgb5:
case Texture::F_rgb8:
case Texture::F_rgb12:
case Texture::F_rgb332:
copy_rgb_image(gltex, tex);
break;
case Texture::F_rgba:
case Texture::F_rgbm:
case Texture::F_rgba4:
case Texture::F_rgba5:
case Texture::F_rgba8:
case Texture::F_rgba12:
case Texture::F_rgba16:
case Texture::F_rgba32:
copy_rgba_image(gltex, tex);
break;
case Texture::F_luminance:
copy_lum_image(gltex, tex);
break;
case Texture::F_red:
copy_one_channel_image(gltex, tex, 0);
break;
case Texture::F_green:
copy_one_channel_image(gltex, tex, 1);
break;
case Texture::F_blue:
copy_one_channel_image(gltex, tex, 2);
break;
case Texture::F_alpha:
copy_alpha_image(gltex, tex);
break;
case Texture::F_luminance_alphamask:
case Texture::F_luminance_alpha:
copy_la_image(gltex, tex);
break;
}
int bytecount = gltex->xsize * gltex->ysize * 4;
gtc->update_data_size_bytes(bytecount);
tex->texture_uploaded();
return true;
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::setup_gltex
// Access: Private
// Description: Sets the GLTexture size, bits, and masks appropriate,
// and allocates space for a pixmap. Does not fill the
// pixmap contents.
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
setup_gltex(GLTexture *gltex, int orig_x_size, int orig_y_size) {
// Ensure we have a power of two size, no more than our max.
int s_size, s_bits;
choose_tex_size(s_size, s_bits, orig_x_size);
int t_size, t_bits;
choose_tex_size(t_size, t_bits, orig_y_size);
int bytecount = s_size * t_size * 4;
gltex->xsize = s_size;
gltex->ysize = t_size;
if (gltex->pixmap != NULL) {
gl_free(gltex->pixmap);
}
gltex->pixmap = (PIXEL *)gl_malloc(bytecount);
gltex->s_max = 1 << (s_bits + ZB_POINT_ST_FRAC_BITS);
gltex->s_mask = (1 << (s_bits + ZB_POINT_ST_FRAC_BITS)) - (1 << ZB_POINT_ST_FRAC_BITS);
gltex->t_max = 1 << (t_bits + ZB_POINT_ST_FRAC_BITS);
gltex->t_mask = (1 << (t_bits + ZB_POINT_ST_FRAC_BITS)) - (1 << ZB_POINT_ST_FRAC_BITS);
gltex->t_shift = (ZB_POINT_ST_FRAC_BITS - s_bits);
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::choose_tex_size
// Access: Private
// Description: Chooses the suitable texture size that is the closest
// power-of-2 match to the indicated original size.
// Also calculates the bit shift count, such that (1 <<
// bits) == size.
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
choose_tex_size(int &size, int &bits, int orig_size) {
unsigned int filled = flood_bits_down((unsigned int)orig_size);
size = filled + 1;
if (size > orig_size) {
// Round down, not up, to next lowest power of 2.
size >>= 1;
}
if (size > _max_texture_dimension) {
size = _max_texture_dimension;
}
bits = count_bits_in_word((unsigned int)size - 1);
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::copy_lum_image
// Access: Private, Static
// Description: Copies and scales the one-channel luminance image
// from the texture into the indicated GLTexture.
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
copy_lum_image(GLTexture *gltex, Texture *tex) {
nassertv(tex->get_num_components() == 1);
int xsize_src = tex->get_x_size();
int ysize_src = tex->get_y_size();
CPTA_uchar src_image = tex->get_ram_image();
nassertv(!src_image.is_null());
const unsigned char *src = src_image.p();
// Component width, and offset to the high-order byte.
int cw = tex->get_component_width();
#ifdef WORDS_BIGENDIAN
// Big-endian: the high-order byte is always first.
static const int co = 0;
#else
// Little-endian: the high-order byte is last.
int co = cw - 1;
#endif
int xsize_dest = gltex->xsize;
int ysize_dest = gltex->ysize;
unsigned char *dest = (unsigned char *)gltex->pixmap;
nassertv(dest != NULL);
int sx_inc = (int)((float)(xsize_src) / (float)(xsize_dest));
int sy_inc = (int)((float)(ysize_src) / (float)(ysize_dest));
unsigned char *dpix = dest;
int syn = 0;
for (int dy = 0; dy < ysize_dest; dy++) {
int sy = syn / ysize_dest;
int sxn = 0;
for (int dx = 0; dx < xsize_dest; dx++) {
int sx = sxn / xsize_dest;
const unsigned char *spix = src + (sy * xsize_src + sx) * 1 * cw;
dpix[0] = spix[co];
dpix[1] = spix[co];
dpix[2] = spix[co];
dpix[3] = 0xff;
dpix += 4;
sxn += xsize_src;
}
syn += ysize_src;
}
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::copy_alpha_image
// Access: Private, Static
// Description: Copies and scales the one-channel alpha image
// from the texture into the indicated GLTexture pixmap.
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
copy_alpha_image(GLTexture *gltex, Texture *tex) {
nassertv(tex->get_num_components() == 1);
int xsize_src = tex->get_x_size();
int ysize_src = tex->get_y_size();
CPTA_uchar src_image = tex->get_ram_image();
nassertv(!src_image.is_null());
const unsigned char *src = src_image.p();
// Component width, and offset to the high-order byte.
int cw = tex->get_component_width();
#ifdef WORDS_BIGENDIAN
// Big-endian: the high-order byte is always first.
static const int co = 0;
#else
// Little-endian: the high-order byte is last.
int co = cw - 1;
#endif
int xsize_dest = gltex->xsize;
int ysize_dest = gltex->ysize;
unsigned char *dest = (unsigned char *)gltex->pixmap;
nassertv(dest != NULL);
int sx_inc = (int)((float)(xsize_src) / (float)(xsize_dest));
int sy_inc = (int)((float)(ysize_src) / (float)(ysize_dest));
unsigned char *dpix = dest;
int syn = 0;
for (int dy = 0; dy < ysize_dest; dy++) {
int sy = syn / ysize_dest;
int sxn = 0;
for (int dx = 0; dx < xsize_dest; dx++) {
int sx = sxn / xsize_dest;
const unsigned char *spix = src + (sy * xsize_src + sx) * 1 * cw;
dpix[0] = 0xff;
dpix[1] = 0xff;
dpix[2] = 0xff;
dpix[3] = spix[co];
dpix += 4;
sxn += xsize_src;
}
syn += ysize_src;
}
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::copy_one_channel_image
// Access: Private, Static
// Description: Copies and scales the one-channel image (with a
// single channel, e.g. red, green, or blue) from
// the texture into the indicated GLTexture pixmap.
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
copy_one_channel_image(GLTexture *gltex, Texture *tex, int channel) {
nassertv(tex->get_num_components() == 1);
int xsize_src = tex->get_x_size();
int ysize_src = tex->get_y_size();
CPTA_uchar src_image = tex->get_ram_image();
nassertv(!src_image.is_null());
const unsigned char *src = src_image.p();
// Component width, and offset to the high-order byte.
int cw = tex->get_component_width();
#ifdef WORDS_BIGENDIAN
// Big-endian: the high-order byte is always first.
static const int co = 0;
#else
// Little-endian: the high-order byte is last.
int co = cw - 1;
#endif
int xsize_dest = gltex->xsize;
int ysize_dest = gltex->ysize;
unsigned char *dest = (unsigned char *)gltex->pixmap;
nassertv(dest != NULL);
int sx_inc = (int)((float)(xsize_src) / (float)(xsize_dest));
int sy_inc = (int)((float)(ysize_src) / (float)(ysize_dest));
unsigned char *dpix = dest;
int syn = 0;
for (int dy = 0; dy < ysize_dest; dy++) {
int sy = syn / ysize_dest;
int sxn = 0;
for (int dx = 0; dx < xsize_dest; dx++) {
int sx = sxn / xsize_dest;
const unsigned char *spix = src + (sy * xsize_src + sx) * 1 * cw;
dpix[0] = 0;
dpix[1] = 0;
dpix[2] = 0;
dpix[3] = 0xff;
dpix[channel] = spix[co];
dpix += 4;
sxn += xsize_src;
}
syn += ysize_src;
}
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::copy_la_image
// Access: Private, Static
// Description: Copies and scales the two-channel luminance-alpha
// image from the texture into the indicated GLTexture
// pixmap.
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
copy_la_image(GLTexture *gltex, Texture *tex) {
nassertv(tex->get_num_components() == 2);
int xsize_src = tex->get_x_size();
int ysize_src = tex->get_y_size();
CPTA_uchar src_image = tex->get_ram_image();
nassertv(!src_image.is_null());
const unsigned char *src = src_image.p();
// Component width, and offset to the high-order byte.
int cw = tex->get_component_width();
#ifdef WORDS_BIGENDIAN
// Big-endian: the high-order byte is always first.
static const int co = 0;
#else
// Little-endian: the high-order byte is last.
int co = cw - 1;
#endif
int xsize_dest = gltex->xsize;
int ysize_dest = gltex->ysize;
unsigned char *dest = (unsigned char *)gltex->pixmap;
nassertv(dest != NULL);
int sx_inc = (int)((float)(xsize_src) / (float)(xsize_dest));
int sy_inc = (int)((float)(ysize_src) / (float)(ysize_dest));
unsigned char *dpix = dest;
int syn = 0;
for (int dy = 0; dy < ysize_dest; dy++) {
int sy = syn / ysize_dest;
int sxn = 0;
for (int dx = 0; dx < xsize_dest; dx++) {
int sx = sxn / xsize_dest;
const unsigned char *spix = src + (sy * xsize_src + sx) * 2 * cw;
dpix[0] = spix[co];
dpix[1] = spix[co];
dpix[2] = spix[co];
dpix[3] = spix[cw + co];
dpix += 4;
sxn += xsize_src;
}
syn += ysize_src;
}
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::copy_rgb_image
// Access: Private, Static
// Description: Copies and scales the three-channel RGB image from
// the texture into the indicated GLTexture pixmap.
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
copy_rgb_image(GLTexture *gltex, Texture *tex) {
nassertv(tex->get_num_components() == 3);
int xsize_src = tex->get_x_size();
int ysize_src = tex->get_y_size();
CPTA_uchar src_image = tex->get_ram_image();
nassertv(!src_image.is_null());
const unsigned char *src = src_image.p();
// Component width, and offset to the high-order byte.
int cw = tex->get_component_width();
#ifdef WORDS_BIGENDIAN
// Big-endian: the high-order byte is always first.
static const int co = 0;
#else
// Little-endian: the high-order byte is last.
int co = cw - 1;
#endif
int xsize_dest = gltex->xsize;
int ysize_dest = gltex->ysize;
unsigned char *dest = (unsigned char *)gltex->pixmap;
nassertv(dest != NULL);
int sx_inc = (int)((float)(xsize_src) / (float)(xsize_dest));
int sy_inc = (int)((float)(ysize_src) / (float)(ysize_dest));
unsigned char *dpix = dest;
int syn = 0;
for (int dy = 0; dy < ysize_dest; dy++) {
int sy = syn / ysize_dest;
int sxn = 0;
for (int dx = 0; dx < xsize_dest; dx++) {
int sx = sxn / xsize_dest;
const unsigned char *spix = src + (sy * xsize_src + sx) * 3 * cw;
dpix[0] = spix[co];
dpix[1] = spix[cw + co];
dpix[2] = spix[cw + cw + co];
dpix[3] = 0xff;
dpix += 4;
sxn += xsize_src;
}
syn += ysize_src;
}
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::copy_rgba_image
// Access: Private, Static
// Description: Copies and scales the four-channel RGBA image from
// the texture into the indicated GLTexture pixmap.
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
copy_rgba_image(GLTexture *gltex, Texture *tex) {
nassertv(tex->get_num_components() == 4);
int xsize_src = tex->get_x_size();
int ysize_src = tex->get_y_size();
CPTA_uchar src_image = tex->get_ram_image();
nassertv(!src_image.is_null());
const unsigned char *src = src_image.p();
// Component width, and offset to the high-order byte.
int cw = tex->get_component_width();
#ifdef WORDS_BIGENDIAN
// Big-endian: the high-order byte is always first.
static const int co = 0;
#else
// Little-endian: the high-order byte is last.
int co = cw - 1;
#endif
int xsize_dest = gltex->xsize;
int ysize_dest = gltex->ysize;
unsigned char *dest = (unsigned char *)gltex->pixmap;
nassertv(dest != NULL);
int sx_inc = (int)((float)(xsize_src) / (float)(xsize_dest));
int sy_inc = (int)((float)(ysize_src) / (float)(ysize_dest));
unsigned char *dpix = dest;
int syn = 0;
for (int dy = 0; dy < ysize_dest; dy++) {
int sy = syn / ysize_dest;
int sxn = 0;
for (int dx = 0; dx < xsize_dest; dx++) {
int sx = sxn / xsize_dest;
const unsigned char *spix = src + (sy * xsize_src + sx) * 4 * cw;
dpix[0] = spix[co];
dpix[1] = spix[cw + co];
dpix[2] = spix[cw + cw + co];
dpix[3] = spix[cw + cw + cw + co];
dpix += 4;
sxn += xsize_src;
}
syn += ysize_src;
}
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::setup_material
// Access: Private
// Description: Applies the desired parametesr to the indicated
// GLMaterial object.
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
setup_material(GLMaterial *gl_material, const Material *material) {
const Colorf &specular = material->get_specular();
gl_material->specular.X = specular[0];
gl_material->specular.Y = specular[1];
gl_material->specular.Z = specular[2];
gl_material->specular.W = specular[3];
const Colorf &emission = material->get_emission();
gl_material->emission.X = emission[0];
gl_material->emission.Y = emission[1];
gl_material->emission.Z = emission[2];
gl_material->emission.W = emission[3];
gl_material->shininess = material->get_shininess();
gl_material->shininess_i = (int)((material->get_shininess() / 128.0f) * SPECULAR_BUFFER_RESOLUTION);
_color_material_flags = CMF_ambient | CMF_diffuse;
if (material->has_ambient()) {
const Colorf &ambient = material->get_ambient();
gl_material->ambient.X = ambient[0];
gl_material->ambient.Y = ambient[1];
gl_material->ambient.Z = ambient[2];
gl_material->ambient.W = ambient[3];
_color_material_flags &= ~CMF_ambient;
}
if (material->has_diffuse()) {
const Colorf &diffuse = material->get_diffuse();
gl_material->diffuse.X = diffuse[0];
gl_material->diffuse.Y = diffuse[1];
gl_material->diffuse.Z = diffuse[2];
gl_material->diffuse.W = diffuse[3];
_color_material_flags &= ~CMF_diffuse;
}
}
////////////////////////////////////////////////////////////////////
// Function: TinyGraphicsStateGuardian::load_matrix
// Access: Private, Static
// Description: Copies the Panda matrix stored in the indicated
// TransformState object into the indicated TinyGL
// matrix.
////////////////////////////////////////////////////////////////////
void TinyGraphicsStateGuardian::
load_matrix(M4 *matrix, const TransformState *transform) {
const LMatrix4f &pm = transform->get_mat();
for (int i = 0; i < 4; ++i) {
matrix->m[0][i] = pm.get_cell(i, 0);
matrix->m[1][i] = pm.get_cell(i, 1);
matrix->m[2][i] = pm.get_cell(i, 2);
matrix->m[3][i] = pm.get_cell(i, 3);
}
}
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