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Fix crash in do_issue_scissor

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This commit is contained in:
rdb 2014-09-20 20:51:40 +00:00
parent d9c529a5d0
commit 0e785de0ff
2 changed files with 9 additions and 3 deletions
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11
panda/src/glstuff/glGraphicsStateGuardian_src.cxx
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@ -310,6 +310,8 @@ CLP(GraphicsStateGuardian)(GraphicsEngine *engine, GraphicsPipe *pipe) :
_check_errors = gl_check_errors;
_force_flush = gl_force_flush;
_scissor_enabled = false;
#ifdef DO_PSTATS
if (gl_finish) {
GLCAT.warning()
@ -2371,8 +2373,10 @@ prepare_display_region(DisplayRegionPipelineReader *dr) {
if (dr->get_scissor_enabled()) {
glEnable(GL_SCISSOR_TEST);
_scissor_enabled = true;
} else {
glDisable(GL_SCISSOR_TEST);
_scissor_enabled = false;
}
if (_supports_viewport_arrays) {
@ -11378,12 +11382,14 @@ do_issue_scissor() {
const ScissorAttrib *target_scissor = DCAST(ScissorAttrib, _target_rs->get_attrib_def(ScissorAttrib::get_class_slot()));
if (target_scissor->is_off()) {
if (_current_display_region->get_scissor_enabled()) {
if (_scissor_enabled) {
glDisable(GL_SCISSOR_TEST);
_scissor_enabled = false;
}
} else {
if (!_current_display_region->get_scissor_enabled()) {
if (!_scissor_enabled) {
glEnable(GL_SCISSOR_TEST);
_scissor_enabled = true;
}
const LVecBase4 &frame = target_scissor->get_frame();
@ -11393,7 +11399,6 @@ do_issue_scissor() {
int width = (int)(_viewport_width * (frame[1] - frame[0]) + 0.5f);
int height = (int)(_viewport_height * (frame[3] - frame[2]) + 0.5f);
glEnable(GL_SCISSOR_TEST);
glScissor(x, y, width, height);
}
}

1
panda/src/glstuff/glGraphicsStateGuardian_src.h
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@ -529,6 +529,7 @@ protected:
PN_stdfloat _point_size;
bool _point_perspective;
bool _vertex_blending_enabled;
bool _scissor_enabled;
#ifndef OPENGLES_1
PT(Shader) _current_shader;