TheCloud/panda3d
1
0
Fork 0
mirror of https://github.com/panda3d/panda3d.git synced 2025-10-02 09:52:27 -04:00
Code Issues Packages Projects Releases Wiki Activity

Changes to GLSL input handling that further assist in efforts to port from Cg to GLSL

Browse Source
This commit is contained in:
rdb 2015-07-14 21:00:12 +01:00
parent 9178ed2871
commit da6140a8cc
2 changed files with 107 additions and 54 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

159
panda/src/glstuff/glShaderContext_src.cxx
View File

@ -51,59 +51,51 @@ TypeHandle CLP(ShaderContext)::_type_handle;
// actually picked up and the appropriate ShaderMatSpec pushed onto _mat_spec.
////////////////////////////////////////////////////////////////////
bool CLP(ShaderContext)::
parse_and_set_short_hand_shader_vars(Shader::ShaderArgId &arg_id, Shader *objShader) {
parse_and_set_short_hand_shader_vars(Shader::ShaderArgId &arg_id, GLenum param_type, GLint param_size, Shader *objShader) {
Shader::ShaderArgInfo p;
p._id = arg_id;
p._cat = GLCAT;
string basename(arg_id._name);
// Split it at the underscores.
vector_string pieces;
tokenize(basename, pieces, "_");
if (pieces[0] == "mstrans") {
pieces[0] = "trans";
pieces.push_back("to");
pieces.push_back("model");
}
if (pieces[0] == "wstrans") {
pieces[0] = "trans";
pieces.push_back("to");
pieces.push_back("world");
}
if (pieces[0] == "vstrans") {
pieces[0] = "trans";
pieces.push_back("to");
pieces.push_back("view");
}
if (pieces[0] == "cstrans") {
pieces[0] = "trans";
pieces.push_back("to");
pieces.push_back("clip");
}
if (pieces[0] == "mspos") {
pieces[0] = "row3";
pieces.push_back("to");
pieces.push_back("model");
}
if (pieces[0] == "wspos") {
pieces[0] = "row3";
pieces.push_back("to");
pieces.push_back("world");
}
if (pieces[0] == "vspos") {
pieces[0] = "row3";
pieces.push_back("to");
pieces.push_back("view");
}
if (pieces[0] == "cspos") {
pieces[0] = "row3";
pieces.push_back("to");
pieces.push_back("clip");
if (pieces.size() == 0 || pieces[0].size() < 3) {
return false;
}
if ((pieces[0] == "mat") || (pieces[0] == "inv") ||
(pieces[0] == "tps") || (pieces[0] == "itp")) {
// mstrans, wstrans, vstrans, cstrans, mspos, wspos, vspos, cspos
if (strcmp(pieces[0].c_str() + 1, "strans") == 0 ||
strcmp(pieces[0].c_str() + 1, "spos") == 0) {
pieces.push_back("to");
switch (pieces[0][0]) {
case 'm':
pieces.push_back("model");
break;
case 'w':
pieces.push_back("world");
break;
case 'v':
pieces.push_back("view");
break;
case 'c':
pieces.push_back("clip");
break;
default:
return false;
}
if (strcmp(pieces[0].c_str() + 1, "strans") == 0) {
pieces[0] = "trans";
} else {
pieces[0] = "row3";
}
// mat_modelproj et al
} else if (pieces[0].size() == 3 &&
(pieces[0] == "mat" || pieces[0] == "inv" ||
pieces[0] == "tps" || pieces[0] == "itp")) {
if (!objShader->cp_errchk_parameter_words(p, 2)) {
return false;
}
@ -156,16 +148,58 @@ parse_and_set_short_hand_shader_vars(Shader::ShaderArgId &arg_id, Shader *objSha
pieces.push_back("");
// Decide whether this is a matrix or vector.
if (pieces[0] == "trans") bind._piece = Shader::SMP_whole;
else if (pieces[0] == "tpose") bind._piece = Shader::SMP_transpose;
else if (pieces[0] == "row0") bind._piece = Shader::SMP_row0;
else if (pieces[0] == "row1") bind._piece = Shader::SMP_row1;
else if (pieces[0] == "row2") bind._piece = Shader::SMP_row2;
else if (pieces[0] == "row3") bind._piece = Shader::SMP_row3;
else if (pieces[0] == "col0") bind._piece = Shader::SMP_col0;
else if (pieces[0] == "col1") bind._piece = Shader::SMP_col1;
else if (pieces[0] == "col2") bind._piece = Shader::SMP_col2;
else if (pieces[0] == "col3") bind._piece = Shader::SMP_col3;
if (param_type == GL_FLOAT_MAT4) {
if (pieces[0] == "trans") bind._piece = Shader::SMP_whole;
else if (pieces[0] == "tpose") bind._piece = Shader::SMP_transpose;
else {
GLCAT.error() << basename << " should be vec4, not mat3\n";
return false;
}
} else if (param_type == GL_FLOAT_MAT3) {
if (pieces[0] == "trans") bind._piece = Shader::SMP_upper3x3;
else if (pieces[0] == "tpose") bind._piece = Shader::SMP_transpose3x3;
else {
GLCAT.error() << basename << " should be vec4, not mat3\n";
return false;
}
} else if (param_type == GL_FLOAT_VEC4) {
if (pieces[0] == "trans") bind._piece = Shader::SMP_col0;
else if (pieces[0] == "tpose") bind._piece = Shader::SMP_row0;
else if (pieces[0] == "row0") bind._piece = Shader::SMP_row0;
else if (pieces[0] == "row1") bind._piece = Shader::SMP_row1;
else if (pieces[0] == "row2") bind._piece = Shader::SMP_row2;
else if (pieces[0] == "row3") bind._piece = Shader::SMP_row3;
else if (pieces[0] == "col0") bind._piece = Shader::SMP_col0;
else if (pieces[0] == "col1") bind._piece = Shader::SMP_col1;
else if (pieces[0] == "col2") bind._piece = Shader::SMP_col2;
else if (pieces[0] == "col3") bind._piece = Shader::SMP_col3;
else {
GLCAT.error() << basename << " should be mat4, not vec4\n";
return false;
}
} else if (pieces[0] == "row3") {
// We'll permit this too, simply because we can support it.
switch (param_type) {
case GL_FLOAT:
bind._piece = Shader::SMP_row3x1;
break;
case GL_FLOAT_VEC2:
bind._piece = Shader::SMP_row3x2;
break;
case GL_FLOAT_VEC3:
bind._piece = Shader::SMP_row3x3;
break;
default:
GLCAT.error() << basename << " should be vec4\n";
return false;
}
} else if (pieces[0] == "trans" || pieces[0] == "tpose") {
GLCAT.error() << basename << " should be mat4 or mat3\n";
return false;
} else {
GLCAT.error() << basename << " should be vec4\n";
return false;
}
if (!objShader->cp_parse_coord_sys(p, pieces, next, bind, true)) {
return false;
@ -194,6 +228,25 @@ parse_and_set_short_hand_shader_vars(Shader::ShaderArgId &arg_id, Shader *objSha
objShader->cp_optimize_mat_spec(bind);
objShader->_mat_spec.push_back(bind);
if (param_size > 1) {
// We support arrays of rows and arrays of columns, so we can
// run the GLSL shaders that cgc spits out.
if (bind._piece == Shader::SMP_row0 || bind._piece == Shader::SMP_col0) {
if (param_size > 4) {
GLCAT.warning() << basename << "[" << param_size << "] is too large, only the first four elements will be defined\n";
param_size = 4;
}
for (int i = 1; i < param_size; ++i) {
bind._id._seqno += 1;
bind._piece = (Shader::ShaderMatPiece)((int)bind._piece + 1);
objShader->_mat_spec.push_back(bind);
}
} else {
GLCAT.warning() << basename << "[" << param_size << "] should not be an array, only the first element will be defined\n";
}
}
return true;
}
return false;
@ -963,7 +1016,7 @@ reflect_uniform(int i, char *name_buffer, GLsizei name_buflen) {
} else {
// Tries to parse shorthand notations like mspos_XXX and trans_model_to_clip_of_XXX
if (parse_and_set_short_hand_shader_vars(arg_id, _shader)) {
if (parse_and_set_short_hand_shader_vars(arg_id, param_type, param_size, _shader)) {
return;
}
}

2
panda/src/glstuff/glShaderContext_src.h
View File

@ -98,7 +98,7 @@ private:
void glsl_report_program_errors(GLuint program, bool fatal);
bool glsl_compile_shader(Shader::ShaderType type);
bool glsl_compile_and_link();
bool parse_and_set_short_hand_shader_vars(Shader::ShaderArgId &arg_id, Shader *s);
bool parse_and_set_short_hand_shader_vars(Shader::ShaderArgId &arg_id, GLenum param_type, GLint param_size, Shader *s);
void release_resources();
public: