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open_toontown_panda3d/panda/src/glstuff/glShaderContext_src.cxx

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// Filename: glShaderContext_src.cxx
// Created by: jyelon (01Sep05)
// Updated by: fperazzi, PandaSE (29Apr10) (updated CLP with note that some
// parameter types only supported under Cg)
//
////////////////////////////////////////////////////////////////////
//
// PANDA 3D SOFTWARE
// Copyright (c) Carnegie Mellon University. All rights reserved.
//
// All use of this software is subject to the terms of the revised BSD
// license. You should have received a copy of this license along
// with this source code in a file named "LICENSE."
//
////////////////////////////////////////////////////////////////////
#ifndef OPENGLES_1
#if defined(HAVE_CG) && !defined(OPENGLES)
#include "Cg/cgGL.h"
#endif
#include "pStatTimer.h"
#define DEBUG_GL_SHADER 0
TypeHandle CLP(ShaderContext)::_type_handle;
#ifndef GL_GEOMETRY_SHADER_EXT
#define GL_GEOMETRY_SHADER_EXT 0x8DD9
#endif
#ifndef GL_GEOMETRY_VERTICES_OUT_EXT
#define GL_GEOMETRY_VERTICES_OUT_EXT 0x8DDA
#endif
#ifndef GL_MAX_GEOMETRY_OUTPUT_VERTICES_EXT
#define GL_MAX_GEOMETRY_OUTPUT_VERTICES_EXT 0x8DE0
#endif
#if defined(HAVE_CG) && !defined(OPENGLES)
#ifndef NDEBUG
#define cg_report_errors() { \
CGerror err = cgGetError(); \
if (err != CG_NO_ERROR) { \
GLCAT.error() << __FILE__ ", line " << __LINE__ << ": " << cgGetErrorString(err) << "\n"; \
} }
#else
#define cg_report_errors()
#endif
#endif
////////////////////////////////////////////////////////////////////
// Function: GLShaderContext::ParseAndSetShaderUniformVars
// Access: Public
// Description: The Panda CG shader syntax defines a useful set of shorthand notations for setting nodepath
// properties as shaderinputs. For example, float4 mspos_XXX refers to nodepath XXX's position
// in model space. This function is a rough attempt to reimplement some of the shorthand
// notations for GLSL. The code is ~99% composed of excerpts dealing with matrix shaderinputs
// from Shader::compile_parameter.
//
// Given a uniform variable name queried from the compiled shader passed in via arg_id,
// 1) parse the name
// 2a) if the name refers to a Panda shorthand notation
// push the appropriate matrix into shader._mat_spec
// returns True
// 2b) If the name doesn't refer to a Panda shorthand notation
// returns False
//
// The boolean return is used to notify down-river processing whether the shader var/parm was
// 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) {
Shader::ShaderArgInfo p;
p._id = arg_id;
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[0] == "mat") || (pieces[0] == "inv") ||
(pieces[0] == "tps") || (pieces[0] == "itp")) {
if (!objShader->cp_errchk_parameter_words(p, 2)) {
return false;
}
string trans = pieces[0];
string matrix = pieces[1];
pieces.clear();
if (matrix == "modelview") {
tokenize("trans_model_to_apiview", pieces, "_");
} else if (matrix == "projection") {
tokenize("trans_apiview_to_apiclip", pieces, "_");
} else if (matrix == "modelproj") {
tokenize("trans_model_to_apiclip", pieces, "_");
} else {
objShader->cp_report_error(p,"unrecognized matrix name");
return false;
}
if (trans == "mat") {
pieces[0] = "trans";
} else if (trans == "inv") {
string t = pieces[1];
pieces[1] = pieces[3];
pieces[3] = t;
} else if (trans == "tps") {
pieces[0] = "tpose";
} else if (trans == "itp") {
string t = pieces[1];
pieces[1] = pieces[3];
pieces[3] = t;
pieces[0] = "tpose";
}
}
// Implement the transform-matrix generator.
if ((pieces[0] == "trans") ||
(pieces[0] == "tpose") ||
(pieces[0] == "row0") ||
(pieces[0] == "row1") ||
(pieces[0] == "row2") ||
(pieces[0] == "row3") ||
(pieces[0] == "col0") ||
(pieces[0] == "col1") ||
(pieces[0] == "col2") ||
(pieces[0] == "col3")) {
Shader::ShaderMatSpec bind;
bind._id = arg_id;
bind._func = Shader::SMF_compose;
int next = 1;
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 (!objShader->cp_parse_coord_sys(p, pieces, next, bind, true)) {
return false;
}
if (!objShader->cp_parse_delimiter(p, pieces, next)) {
return false;
}
if (!objShader->cp_parse_coord_sys(p, pieces, next, bind, false)) {
return false;
}
if (!objShader->cp_parse_eol(p, pieces, next)) {
return false;
}
objShader->cp_optimize_mat_spec(bind);
objShader->_mat_spec.push_back(bind);
return true;
}
return false;
}
////////////////////////////////////////////////////////////////////
// Function: GLShaderContext::Constructor
// Access: Public
// Description: xyz
////////////////////////////////////////////////////////////////////
CLP(ShaderContext)::
CLP(ShaderContext)(Shader *s, GSG *gsg) : ShaderContext(s) {
_last_gsg = gsg;
_glsl_program = 0;
_glsl_vshader = 0;
_glsl_fshader = 0;
_glsl_gshader = 0;
_glsl_tcshader = 0;
_glsl_teshader = 0;
_uses_standard_vertex_arrays = false;
#if defined(HAVE_CG) && !defined(OPENGLES)
_cg_context = 0;
_cg_vprofile = CG_PROFILE_UNKNOWN;
_cg_fprofile = CG_PROFILE_UNKNOWN;
_cg_gprofile = CG_PROFILE_UNKNOWN;
if (s->get_language() == Shader::SL_Cg) {
// Ask the shader to compile itself for us and
// to give us the resulting Cg program objects.
if (!s->cg_compile_for(gsg->_shader_caps,
_cg_context,
_cg_vprogram,
_cg_fprogram,
_cg_gprogram,
_cg_parameter_map)) {
return;
}
// Load the program.
if (_cg_vprogram != 0) {
_cg_vprofile = cgGetProgramProfile(_cg_vprogram);
cgGLLoadProgram(_cg_vprogram);
CGerror verror = cgGetError();
if (verror != CG_NO_ERROR) {
const char *str = cgGetErrorString(verror);
GLCAT.error()
<< "Could not load Cg vertex program: " << s->get_filename(Shader::ST_vertex)
<< " (" << cgGetProfileString(_cg_vprofile) << " " << str << ")\n";
release_resources(gsg);
}
}
if (_cg_fprogram != 0) {
_cg_fprofile = cgGetProgramProfile(_cg_fprogram);
cgGLLoadProgram(_cg_fprogram);
CGerror ferror = cgGetError();
if (ferror != CG_NO_ERROR) {
const char *str = cgGetErrorString(ferror);
GLCAT.error()
<< "Could not load Cg fragment program: " << s->get_filename(Shader::ST_fragment)
<< " (" << cgGetProfileString(_cg_fprofile) << " " << str << ")\n";
release_resources(gsg);
}
}
if (_cg_gprogram != 0) {
_cg_gprofile = cgGetProgramProfile(_cg_gprogram);
cgGLLoadProgram(_cg_gprogram);
CGerror gerror = cgGetError();
if (gerror != CG_NO_ERROR) {
const char *str = cgGetErrorString(gerror);
GLCAT.error()
<< "Could not load Cg geometry program: " << s->get_filename(Shader::ST_geometry)
<< " (" << cgGetProfileString(_cg_gprofile) << " " << str << ")\n";
release_resources(gsg);
}
}
gsg->report_my_gl_errors();
}
#endif
if (s->get_language() == Shader::SL_GLSL) {
// We compile and analyze the shader here, instead of in shader.cxx, to avoid gobj getting a dependency on GL stuff.
if (_glsl_program == 0) {
gsg->report_my_gl_errors();
if (!glsl_compile_shader(gsg)) {
release_resources(gsg);
s->_error_flag = true;
return;
}
}
// Analyze the uniforms and put them in _glsl_parameter_map
if (_glsl_parameter_map.size() == 0) {
int seqno = 0, texunitno = 0;
string noprefix;
GLint param_count, param_maxlength, param_size;
GLenum param_type;
gsg->_glGetProgramiv(_glsl_program, GL_ACTIVE_UNIFORMS, &param_count);
gsg->_glGetProgramiv(_glsl_program, GL_ACTIVE_UNIFORM_MAX_LENGTH, &param_maxlength);
char* param_name_cstr = (char *)alloca(param_maxlength);
for (int i = 0; i < param_count; ++i) {
param_name_cstr[0] = 0;
gsg->_glGetActiveUniform(_glsl_program, i, param_maxlength, NULL, &param_size, &param_type, param_name_cstr);
string param_name(param_name_cstr);
GLint p = gsg->_glGetUniformLocation(_glsl_program, param_name_cstr);
if (GLCAT.is_debug()) {
GLCAT.debug()
<< "Active uniform " << param_name << " with size " << param_size
<< " and type " << param_type << " is bound to location " << p << "\n";
}
if (p > -1) {
// Strip off [0] suffix that some drivers append to arrays.
size_t size = param_name.size();
if (size > 3 && param_name.substr(size - 3, 3) == "[0]") {
param_name = param_name.substr(0, size - 3);
}
Shader::ShaderArgId arg_id;
arg_id._name = param_name;
arg_id._seqno = seqno++;
_glsl_parameter_map.push_back(p);
// Check for inputs with p3d_ prefix.
if (param_name.substr(0, 4) == "p3d_") {
noprefix = param_name.substr(4);
// Check for matrix inputs.
bool transpose = false;
bool inverse = false;
string matrix_name (noprefix);
// Check for and chop off any "Transpose" or "Inverse" suffix.
if (size > 15 && matrix_name.compare(size - 9, 9, "Transpose") == 0) {
transpose = true;
matrix_name = matrix_name.substr(0, size - 9);
}
size = matrix_name.size();
if (size > 13 && matrix_name.compare(size - 7, 7, "Inverse") == 0) {
inverse = true;
matrix_name = matrix_name.substr(0, size - 7);
}
size = matrix_name.size();
// Now if the suffix that is left over is "Matrix",
// we know that it is supposed to be a matrix input.
if (size > 6 && matrix_name.compare(size - 6, 6, "Matrix") == 0) {
Shader::ShaderMatSpec bind;
bind._id = arg_id;
if (transpose) {
bind._piece = Shader::SMP_transpose;
} else {
bind._piece = Shader::SMP_whole;
}
bind._arg[0] = NULL;
bind._arg[1] = NULL;
if (matrix_name == "ModelViewProjectionMatrix") {
bind._func = Shader::SMF_compose;
if (inverse) {
bind._part[0] = Shader::SMO_apiclip_to_view;
bind._part[1] = Shader::SMO_view_to_model;
} else {
bind._part[0] = Shader::SMO_model_to_view;
bind._part[1] = Shader::SMO_view_to_apiclip;
}
bind._dep[0] = Shader::SSD_general | Shader::SSD_transform;
bind._dep[1] = Shader::SSD_general | Shader::SSD_transform;
} else if (matrix_name == "ModelViewMatrix") {
bind._func = Shader::SMF_compose;
if (inverse) {
bind._part[0] = Shader::SMO_apiview_to_view;
bind._part[1] = Shader::SMO_view_to_model;
} else {
bind._part[0] = Shader::SMO_model_to_view;
bind._part[1] = Shader::SMO_view_to_apiview;
}
bind._dep[0] = Shader::SSD_general | Shader::SSD_transform;
bind._dep[1] = Shader::SSD_general | Shader::SSD_transform;
} else if (matrix_name == "ProjectionMatrix") {
bind._func = Shader::SMF_compose;
if (inverse) {
bind._part[0] = Shader::SMO_apiclip_to_view;
bind._part[1] = Shader::SMO_view_to_apiview;
} else {
bind._part[0] = Shader::SMO_apiview_to_view;
bind._part[1] = Shader::SMO_view_to_apiclip;
}
bind._dep[0] = Shader::SSD_general | Shader::SSD_transform;
bind._dep[1] = Shader::SSD_general | Shader::SSD_transform;
} else if (matrix_name == "NormalMatrix") {
// This is really the upper 3x3 of the ModelViewMatrixInverseTranspose.
bind._func = Shader::SMF_compose;
if (inverse) {
bind._part[0] = Shader::SMO_model_to_view;
bind._part[1] = Shader::SMO_view_to_apiview;
} else {
bind._part[0] = Shader::SMO_apiview_to_view;
bind._part[1] = Shader::SMO_view_to_model;
}
bind._dep[0] = Shader::SSD_general | Shader::SSD_transform;
bind._dep[1] = Shader::SSD_general | Shader::SSD_transform;
if (transpose) {
bind._piece = Shader::SMP_upper3x3;
} else {
bind._piece = Shader::SMP_transpose3x3;
}
} else {
GLCAT.error() << "Unrecognized uniform matrix name '" << matrix_name << "'!\n";
continue;
}
s->_mat_spec.push_back(bind);
continue;
}
if (size > 7 && noprefix.substr(0, 7) == "Texture") {
Shader::ShaderTexSpec bind;
bind._id = arg_id;
bind._name = 0;
bind._desired_type = Texture::TT_2d_texture;
bind._stage = atoi(noprefix.substr(7).c_str());
s->_tex_spec.push_back(bind);
continue;
}
if (size > 9 && noprefix.substr(0, 9) == "Material.") {
Shader::ShaderMatSpec bind;
bind._id = arg_id;
bind._func = Shader::SMF_first;
bind._part[0] = Shader::SMO_attr_material;
bind._arg[0] = NULL;
bind._dep[0] = Shader::SSD_general | Shader::SSD_material;
bind._part[1] = Shader::SMO_identity;
bind._arg[1] = NULL;
bind._dep[1] = Shader::SSD_NONE;
if (noprefix == "Material.ambient") {
bind._piece = Shader::SMP_row0;
s->_mat_spec.push_back(bind);
continue;
} else if (noprefix == "Material.diffuse") {
bind._piece = Shader::SMP_row1;
s->_mat_spec.push_back(bind);
continue;
} else if (noprefix == "Material.emission") {
bind._piece = Shader::SMP_row2;
s->_mat_spec.push_back(bind);
continue;
} else if (noprefix == "Material.specular") {
bind._piece = Shader::SMP_row3;
s->_mat_spec.push_back(bind);
continue;
}
}
if (noprefix == "ColorScale") {
Shader::ShaderMatSpec bind;
bind._id = arg_id;
bind._piece = Shader::SMP_row3;
bind._func = Shader::SMF_first;
bind._part[0] = Shader::SMO_attr_colorscale;
bind._arg[0] = NULL;
bind._dep[0] = Shader::SSD_general | Shader::SSD_colorscale;
bind._part[1] = Shader::SMO_identity;
bind._arg[1] = NULL;
bind._dep[1] = Shader::SSD_NONE;
s->_mat_spec.push_back(bind);
continue;
}
GLCAT.error() << "Unrecognized uniform name '" << param_name_cstr << "'!\n";
continue;
} else if (param_name.substr(0, 4) == "osg_") {
// These inputs are supported by OpenSceneGraph. We can support
// them as well, to increase compatibility.
// Other inputs we may support in the future:
// int osg_FrameNumber
Shader::ShaderMatSpec bind;
bind._id = arg_id;
bind._arg[0] = NULL;
bind._arg[1] = NULL;
if (param_name == "osg_ViewMatrix") {
bind._piece = Shader::SMP_whole;
bind._func = Shader::SMF_first;
bind._part[0] = Shader::SMO_world_to_view;
bind._part[1] = Shader::SMO_identity;
bind._dep[0] = Shader::SSD_general | Shader::SSD_transform;
bind._dep[1] = Shader::SSD_NONE;
s->_mat_spec.push_back(bind);
continue;
} else if (param_name == "osg_InverseViewMatrix") {
bind._piece = Shader::SMP_whole;
bind._func = Shader::SMF_first;
bind._part[0] = Shader::SMO_view_to_world;
bind._part[1] = Shader::SMO_identity;
bind._dep[0] = Shader::SSD_general | Shader::SSD_transform;
bind._dep[1] = Shader::SSD_NONE;
s->_mat_spec.push_back(bind);
continue;
} else if (param_name == "osg_FrameTime") {
bind._piece = Shader::SMP_row3x1;
bind._func = Shader::SMF_first;
bind._part[0] = Shader::SMO_frame_time;
bind._part[1] = Shader::SMO_identity;
bind._dep[0] = Shader::SSD_general;
bind._dep[1] = Shader::SSD_NONE;
s->_mat_spec.push_back(bind);
continue;
} else if (param_name == "osg_DeltaFrameTime") {
bind._piece = Shader::SMP_row3x1;
bind._func = Shader::SMF_first;
bind._part[0] = Shader::SMO_frame_delta;
bind._part[1] = Shader::SMO_identity;
bind._dep[0] = Shader::SSD_general;
bind._dep[1] = Shader::SSD_NONE;
s->_mat_spec.push_back(bind);
continue;
}
}
//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, s)) {
continue;
}
if (param_size == 1) {
switch (param_type) {
#ifndef OPENGLES
case GL_SAMPLER_1D_SHADOW:
case GL_SAMPLER_1D: {
Shader::ShaderTexSpec bind;
bind._id = arg_id;
bind._name = InternalName::make(param_name);
bind._desired_type = Texture::TT_1d_texture;
bind._stage = texunitno++;
s->_tex_spec.push_back(bind);
continue; }
case GL_SAMPLER_2D_SHADOW:
#endif
case GL_SAMPLER_2D: {
Shader::ShaderTexSpec bind;
bind._id = arg_id;
bind._name = InternalName::make(param_name);
bind._desired_type = Texture::TT_2d_texture;
bind._stage = texunitno++;
s->_tex_spec.push_back(bind);
continue; }
case GL_SAMPLER_3D: {
Shader::ShaderTexSpec bind;
bind._id = arg_id;
bind._name = InternalName::make(param_name);
bind._desired_type = Texture::TT_3d_texture;
bind._stage = texunitno++;
s->_tex_spec.push_back(bind);
continue; }
case GL_SAMPLER_CUBE: {
Shader::ShaderTexSpec bind;
bind._id = arg_id;
bind._name = InternalName::make(param_name);
bind._desired_type = Texture::TT_cube_map;
bind._stage = texunitno++;
s->_tex_spec.push_back(bind);
continue; }
#ifndef OPENGLES
case GL_SAMPLER_2D_ARRAY: {
Shader::ShaderTexSpec bind;
bind._id = arg_id;
bind._name = InternalName::make(param_name);
bind._desired_type = Texture::TT_2d_texture_array;
bind._stage = texunitno++;
s->_tex_spec.push_back(bind);
continue; }
#endif
case GL_FLOAT_MAT2:
#ifndef OPENGLES
case GL_FLOAT_MAT2x3:
case GL_FLOAT_MAT2x4:
case GL_FLOAT_MAT3x2:
case GL_FLOAT_MAT3x4:
case GL_FLOAT_MAT4x2:
case GL_FLOAT_MAT4x3:
#endif
GLCAT.warning() << "GLSL shader requested an unrecognized matrix type\n";
continue;
case GL_FLOAT_MAT3: {
Shader::ShaderMatSpec bind;
bind._id = arg_id;
bind._piece = Shader::SMP_upper3x3;
bind._func = Shader::SMF_first;
bind._part[0] = Shader::SMO_mat_constant_x;
bind._arg[0] = InternalName::make(param_name);
bind._dep[0] = Shader::SSD_general | Shader::SSD_shaderinputs;
bind._part[1] = Shader::SMO_identity;
bind._arg[1] = NULL;
bind._dep[1] = Shader::SSD_NONE;
s->_mat_spec.push_back(bind);
continue; }
case GL_FLOAT_MAT4: {
Shader::ShaderMatSpec bind;
bind._id = arg_id;
bind._piece = Shader::SMP_whole;
bind._func = Shader::SMF_first;
bind._part[0] = Shader::SMO_mat_constant_x;
bind._arg[0] = InternalName::make(param_name);
bind._dep[0] = Shader::SSD_general | Shader::SSD_shaderinputs;
bind._part[1] = Shader::SMO_identity;
bind._arg[1] = NULL;
bind._dep[1] = Shader::SSD_NONE;
s->_mat_spec.push_back(bind);
continue; }
case GL_BOOL:
case GL_BOOL_VEC2:
case GL_BOOL_VEC3:
case GL_BOOL_VEC4:
case GL_FLOAT:
case GL_FLOAT_VEC2:
case GL_FLOAT_VEC3:
case GL_FLOAT_VEC4: {
Shader::ShaderMatSpec bind;
bind._id = arg_id;
switch (param_type) {
case GL_BOOL:
case GL_FLOAT: bind._piece = Shader::SMP_row3x1; break;
case GL_BOOL_VEC2:
case GL_FLOAT_VEC2: bind._piece = Shader::SMP_row3x2; break;
case GL_BOOL_VEC3:
case GL_FLOAT_VEC3: bind._piece = Shader::SMP_row3x3; break;
case GL_BOOL_VEC4:
case GL_FLOAT_VEC4: bind._piece = Shader::SMP_row3 ; break;
}
bind._func = Shader::SMF_first;
bind._part[0] = Shader::SMO_vec_constant_x;
bind._arg[0] = InternalName::make(param_name);
bind._dep[0] = Shader::SSD_general | Shader::SSD_shaderinputs;
bind._part[1] = Shader::SMO_identity;
bind._arg[1] = NULL;
bind._dep[1] = Shader::SSD_NONE;
s->_mat_spec.push_back(bind);
continue; }
case GL_INT:
case GL_INT_VEC2:
case GL_INT_VEC3:
case GL_INT_VEC4:
GLCAT.warning() << "Panda does not support passing integers to shaders (yet)!\n";
continue;
default:
GLCAT.warning() << "Ignoring unrecognized GLSL parameter type!\n";
}
} else {
switch (param_type) {
case GL_FLOAT_MAT2:
#ifndef OPENGLES
case GL_FLOAT_MAT2x3:
case GL_FLOAT_MAT2x4:
case GL_FLOAT_MAT3x2:
case GL_FLOAT_MAT3x4:
case GL_FLOAT_MAT4x2:
case GL_FLOAT_MAT4x3:
#endif
GLCAT.warning() << "GLSL shader requested an unrecognized matrix array type\n";
continue;
case GL_BOOL:
case GL_BOOL_VEC2:
case GL_BOOL_VEC3:
case GL_BOOL_VEC4:
case GL_FLOAT:
case GL_FLOAT_VEC2:
case GL_FLOAT_VEC3:
case GL_FLOAT_VEC4:
case GL_FLOAT_MAT3:
case GL_FLOAT_MAT4: {
Shader::ShaderPtrSpec bind;
bind._id = arg_id;
switch (param_type) {
case GL_BOOL:
case GL_FLOAT: bind._dim[1] = 1; break;
case GL_BOOL_VEC2:
case GL_FLOAT_VEC2: bind._dim[1] = 2; break;
case GL_BOOL_VEC3:
case GL_FLOAT_VEC3: bind._dim[1] = 3; break;
case GL_BOOL_VEC4:
case GL_FLOAT_VEC4: bind._dim[1] = 4; break;
case GL_FLOAT_MAT3: bind._dim[1] = 9; break;
case GL_FLOAT_MAT4: bind._dim[1] = 16; break;
}
bind._arg = InternalName::make(param_name);
bind._dim[0] = param_size;
bind._dep[0] = Shader::SSD_general | Shader::SSD_shaderinputs;
bind._dep[1] = Shader::SSD_NONE;
s->_ptr_spec.push_back(bind);
continue; }
case GL_INT:
case GL_INT_VEC2:
case GL_INT_VEC3:
case GL_INT_VEC4:
GLCAT.warning() << "Panda does not support passing integer arrays to shaders (yet)!\n";
continue;
default:
GLCAT.warning() << "Ignoring unrecognized GLSL parameter array type!\n";
}
}
}
}
// Now we've processed the uniforms, we'll process the attribs.
gsg->_glGetProgramiv(_glsl_program, GL_ACTIVE_ATTRIBUTES, &param_count);
gsg->_glGetProgramiv(_glsl_program, GL_ACTIVE_ATTRIBUTE_MAX_LENGTH, &param_maxlength);
param_name_cstr = (char *)alloca(param_maxlength);
for (int i = 0; i < param_count; ++i) {
param_name_cstr[0] = 0;
gsg->_glGetActiveAttrib(_glsl_program, i, param_maxlength, NULL, &param_size, &param_type, param_name_cstr);
string param_name(param_name_cstr);
// Get the attrib location.
GLint p = gsg->_glGetAttribLocation(_glsl_program, param_name_cstr);
GLCAT.debug() <<
"Active attribute " << param_name << " is bound to location " << p << "\n";
if (p == -1) {
// A gl_ attribute such as gl_Vertex requires us to pass the
// standard vertex arrays as we would do without shader.
// This is not always the case, though -- see below.
_uses_standard_vertex_arrays = true;
continue;
}
Shader::ShaderArgId arg_id;
arg_id._name = param_name;
arg_id._seqno = seqno++;
_glsl_parameter_map.push_back(p);
Shader::ShaderVarSpec bind;
bind._id = arg_id;
bind._name = NULL;
bind._append_uv = -1;
if (param_name.substr(0, 3) == "gl_") {
// Not all drivers return -1 in glGetAttribLocation
// for gl_ prefixed attributes.
_uses_standard_vertex_arrays = true;
continue;
} else if (param_name.substr(0, 4) == "p3d_") {
noprefix = param_name.substr(4);
} else {
noprefix = "";
}
if (noprefix.empty()) {
// Arbitrarily named attribute.
bind._name = InternalName::make(param_name);
} else if (noprefix == "Vertex") {
bind._name = InternalName::get_vertex();
} else if (noprefix == "Normal") {
bind._name = InternalName::get_normal();
} else if (noprefix == "Color") {
bind._name = InternalName::get_color();
} else if (noprefix.substr(0, 7) == "Tangent") {
bind._name = InternalName::get_tangent();
if (noprefix.size() > 7) {
bind._append_uv = atoi(noprefix.substr(7).c_str());
}
} else if (noprefix.substr(0, 8) == "Binormal") {
bind._name = InternalName::get_binormal();
if (noprefix.size() > 8) {
bind._append_uv = atoi(noprefix.substr(8).c_str());
}
} else if (noprefix.substr(0, 13) == "MultiTexCoord") {
bind._name = InternalName::get_texcoord();
bind._append_uv = atoi(noprefix.substr(13).c_str());
} else {
GLCAT.error() << "Unrecognized vertex attrib '" << param_name << "'!\n";
continue;
}
s->_var_spec.push_back(bind);
}
}
}
gsg->report_my_gl_errors();
}
////////////////////////////////////////////////////////////////////
// Function: GLShaderContext::Destructor
// Access: Public
// Description: xyz
////////////////////////////////////////////////////////////////////
CLP(ShaderContext)::
~CLP(ShaderContext)() {
release_resources(_last_gsg);
}
////////////////////////////////////////////////////////////////////
// Function: GLShaderContext::release_resources
// Access: Public
// Description: Should deallocate all system resources (such as
// vertex program handles or Cg contexts).
////////////////////////////////////////////////////////////////////
void CLP(ShaderContext)::
release_resources(GSG *gsg) {
#if defined(HAVE_CG) && !defined(OPENGLES)
if (_cg_context) {
cgDestroyContext(_cg_context);
_cg_context = 0;
// Do *NOT* destroy the programs here! It causes problems.
// if (_cg_vprogram != 0) cgDestroyProgram(_cg_vprogram);
// if (_cg_fprogram != 0) cgDestroyProgram(_cg_fprogram);
// if (_cg_gprogram != 0) cgDestroyProgram(_cg_gprogram);
_cg_vprogram = 0;
_cg_fprogram = 0;
_cg_gprogram = 0;
_cg_parameter_map.clear();
}
if (gsg) {
gsg->report_my_gl_errors();
} else if (glGetError() != GL_NO_ERROR) {
GLCAT.error() << "GL error in ShaderContext destructor\n";
}
#endif
if (!gsg) {
return;
}
if (_glsl_program != 0) {
if (_glsl_vshader != 0) {
gsg->_glDetachShader(_glsl_program, _glsl_vshader);
}
if (_glsl_fshader != 0) {
gsg->_glDetachShader(_glsl_program, _glsl_fshader);
}
if (_glsl_gshader != 0) {
gsg->_glDetachShader(_glsl_program, _glsl_gshader);
}
if (_glsl_tcshader != 0) {
gsg->_glDetachShader(_glsl_program, _glsl_tcshader);
}
if (_glsl_teshader != 0) {
gsg->_glDetachShader(_glsl_program, _glsl_teshader);
}
gsg->_glDeleteProgram(_glsl_program);
_glsl_program = 0;
}
if (_glsl_vshader != 0) {
gsg->_glDeleteShader(_glsl_vshader);
_glsl_vshader = 0;
}
if (_glsl_fshader != 0) {
gsg->_glDeleteShader(_glsl_fshader);
_glsl_fshader = 0;
}
if (_glsl_gshader != 0) {
gsg->_glDeleteShader(_glsl_gshader);
_glsl_gshader = 0;
}
if (_glsl_tcshader != 0) {
gsg->_glDeleteShader(_glsl_tcshader);
_glsl_tcshader = 0;
}
if (_glsl_teshader != 0) {
gsg->_glDeleteShader(_glsl_teshader);
_glsl_teshader = 0;
}
gsg->report_my_gl_errors();
}
////////////////////////////////////////////////////////////////////
// Function: GLShaderContext::bind
// Access: Public
// Description: This function is to be called to enable a new
// shader. It also initializes all of the shader's
// input parameters.
////////////////////////////////////////////////////////////////////
void CLP(ShaderContext)::
bind(GSG *gsg, bool reissue_parameters) {
_last_gsg = gsg;
// GLSL shaders need to be bound before passing parameters.
if (_shader->get_language() == Shader::SL_GLSL && !_shader->get_error_flag()) {
gsg->_glUseProgram(_glsl_program);
}
if (reissue_parameters) {
// Pass in k-parameters and transform-parameters
issue_parameters(gsg, Shader::SSD_general);
}
#if defined(HAVE_CG) && !defined(OPENGLES)
if (_cg_context != 0) {
// Bind the shaders.
if (_cg_vprogram != 0) {
cgGLEnableProfile(_cg_vprofile);
cgGLBindProgram(_cg_vprogram);
}
if (_cg_fprogram != 0) {
cgGLEnableProfile(_cg_fprofile);
cgGLBindProgram(_cg_fprogram);
}
if (_cg_gprogram != 0) {
cgGLEnableProfile(_cg_gprofile);
cgGLBindProgram(_cg_gprogram);
}
cg_report_errors();
}
#endif
gsg->report_my_gl_errors();
}
////////////////////////////////////////////////////////////////////
// Function: GLShaderContext::unbind
// Access: Public
// Description: This function disables a currently-bound shader.
////////////////////////////////////////////////////////////////////
void CLP(ShaderContext)::
unbind(GSG *gsg) {
_last_gsg = gsg;
#if defined(HAVE_CG) && !defined(OPENGLES)
if (_cg_context != 0) {
if (_cg_vprogram != 0) {
cgGLUnbindProgram(_cg_vprofile);
cgGLDisableProfile(_cg_vprofile);
}
if (_cg_fprogram != 0) {
cgGLUnbindProgram(_cg_fprofile);
cgGLDisableProfile(_cg_fprofile);
}
if (_cg_gprogram != 0) {
cgGLUnbindProgram(_cg_gprofile);
cgGLDisableProfile(_cg_gprofile);
}
cg_report_errors();
}
#endif
if (_shader->get_language() == Shader::SL_GLSL) {
gsg->_glUseProgram(0);
}
gsg->report_my_gl_errors();
}
////////////////////////////////////////////////////////////////////
// Function: GLShaderContext::issue_parameters
// Access: Public
// Description: This function gets called whenever the RenderState
// or TransformState has changed, but the Shader
// itself has not changed. It loads new values into the
// shader's parameters.
//
// If "altered" is false, that means you promise that
// the parameters for this shader context have already
// been issued once, and that since the last time the
// parameters were issued, no part of the render
// state has changed except the external and internal
// transforms.
////////////////////////////////////////////////////////////////////
void CLP(ShaderContext)::
issue_parameters(GSG *gsg, int altered) {
_last_gsg = gsg;
PStatTimer timer(gsg->_draw_set_state_shader_parameters_pcollector);
if (!valid()) {
return;
}
// Iterate through _ptr parameters
for (int i=0; i<(int)_shader->_ptr_spec.size(); i++) {
if(altered & (_shader->_ptr_spec[i]._dep[0] | _shader->_ptr_spec[i]._dep[1])) {
if (_shader->get_language() == Shader::SL_GLSL) {
const Shader::ShaderPtrSpec& _ptr = _shader->_ptr_spec[i];
Shader::ShaderPtrData* _ptr_data =
const_cast< Shader::ShaderPtrData*>(gsg->fetch_ptr_parameter(_ptr));
if (_ptr_data == NULL) { //the input is not contained in ShaderPtrData
release_resources(gsg);
return;
}
GLint p = _glsl_parameter_map[_shader->_ptr_spec[i]._id._seqno];
switch (_ptr._dim[1]) {
case 1: gsg->_glUniform1fv(p, _ptr._dim[0], (float*)_ptr_data->_ptr); continue;
case 2: gsg->_glUniform2fv(p, _ptr._dim[0], (float*)_ptr_data->_ptr); continue;
case 3: gsg->_glUniform3fv(p, _ptr._dim[0], (float*)_ptr_data->_ptr); continue;
case 4: gsg->_glUniform4fv(p, _ptr._dim[0], (float*)_ptr_data->_ptr); continue;
case 9: gsg->_glUniformMatrix3fv(p, _ptr._dim[0], GL_FALSE, (float*)_ptr_data->_ptr); continue;
case 16: gsg->_glUniformMatrix4fv(p, _ptr._dim[0], GL_FALSE, (float*)_ptr_data->_ptr); continue;
}
}
#if defined(HAVE_CG) && !defined(OPENGLES)
else if (_shader->get_language() == Shader::SL_Cg) {
const Shader::ShaderPtrSpec& _ptr = _shader->_ptr_spec[i];
Shader::ShaderPtrData* ptr_data =
const_cast< Shader::ShaderPtrData*>(gsg->fetch_ptr_parameter(_ptr));
if (ptr_data == NULL){ //the input is not contained in ShaderPtrData
release_resources(gsg);
return;
}
//check if the data must be shipped to the GPU
/*if (!ptr_data->_updated)
continue;
ptr_data->_updated = false;*/
//Check if the size of the shader input and ptr_data match
int input_size = _ptr._dim[0] * _ptr._dim[1] * _ptr._dim[2];
// dimension is negative only if the parameter had the (deprecated)k_ prefix.
if ((input_size > ptr_data->_size) && (_ptr._dim[0] > 0)) {
GLCAT.error() << _ptr._id._name << ": incorrect number of elements, expected "
<< input_size <<" got " << ptr_data->_size << "\n";
release_resources(gsg);
return;
}
CGparameter p = _cg_parameter_map[_ptr._id._seqno];
switch (ptr_data->_type) {
case Shader::SPT_float:
switch(_ptr._info._class) {
case Shader::SAC_scalar: cgSetParameter1fv(p,(float*)ptr_data->_ptr); continue;
case Shader::SAC_vector:
switch(_ptr._info._type) {
case Shader::SAT_vec1: cgSetParameter1fv(p,(float*)ptr_data->_ptr); continue;
case Shader::SAT_vec2: cgSetParameter2fv(p,(float*)ptr_data->_ptr); continue;
case Shader::SAT_vec3: cgSetParameter3fv(p,(float*)ptr_data->_ptr); continue;
case Shader::SAT_vec4: cgSetParameter4fv(p,(float*)ptr_data->_ptr); continue;
}
case Shader::SAC_matrix: cgGLSetMatrixParameterfc(p,(float*)ptr_data->_ptr); continue;
case Shader::SAC_array: {
switch(_ptr._info._subclass) {
case Shader::SAC_scalar:
cgGLSetParameterArray1f(p,0,_ptr._dim[0],(float*)ptr_data->_ptr); continue;
case Shader::SAC_vector:
switch(_ptr._dim[2]) {
case 1: cgGLSetParameterArray1f(p,0,_ptr._dim[0],(float*)ptr_data->_ptr); continue;
case 2: cgGLSetParameterArray2f(p,0,_ptr._dim[0],(float*)ptr_data->_ptr); continue;
case 3: cgGLSetParameterArray3f(p,0,_ptr._dim[0],(float*)ptr_data->_ptr); continue;
case 4: cgGLSetParameterArray4f(p,0,_ptr._dim[0],(float*)ptr_data->_ptr); continue;
}
case Shader::SAC_matrix:
cgGLSetMatrixParameterArrayfc(p,0,_ptr._dim[0],(float*)ptr_data->_ptr); continue;
}
}
}
case Shader::SPT_double:
switch(_ptr._info._class) {
case Shader::SAC_scalar: cgSetParameter1dv(p,(double*)ptr_data->_ptr); continue;
case Shader::SAC_vector:
switch(_ptr._info._type) {
case Shader::SAT_vec1: cgSetParameter1dv(p,(double*)ptr_data->_ptr); continue;
case Shader::SAT_vec2: cgSetParameter2dv(p,(double*)ptr_data->_ptr); continue;
case Shader::SAT_vec3: cgSetParameter3dv(p,(double*)ptr_data->_ptr); continue;
case Shader::SAT_vec4: cgSetParameter4dv(p,(double*)ptr_data->_ptr); continue;
}
case Shader::SAC_matrix: cgGLSetMatrixParameterdc(p,(double*)ptr_data->_ptr); continue;
case Shader::SAC_array: {
switch(_ptr._info._subclass) {
case Shader::SAC_scalar:
cgGLSetParameterArray1d(p,0,_ptr._dim[0],(double*)ptr_data->_ptr); continue;
case Shader::SAC_vector:
switch(_ptr._dim[2]) {
case 1: cgGLSetParameterArray1d(p,0,_ptr._dim[0],(double*)ptr_data->_ptr); continue;
case 2: cgGLSetParameterArray2d(p,0,_ptr._dim[0],(double*)ptr_data->_ptr); continue;
case 3: cgGLSetParameterArray3d(p,0,_ptr._dim[0],(double*)ptr_data->_ptr); continue;
case 4: cgGLSetParameterArray4d(p,0,_ptr._dim[0],(double*)ptr_data->_ptr); continue;
}
case Shader::SAC_matrix:
cgGLSetMatrixParameterArraydc(p,0,_ptr._dim[0],(double*)ptr_data->_ptr); continue;
}
}
}
default: GLCAT.error() << _ptr._id._name << ":" << "unrecognized parameter type\n";
release_resources(gsg);
return;
}
}
#endif
}
}
//FIXME: this could be much faster if we used deferred parameter setting.
for (int i=0; i<(int)_shader->_mat_spec.size(); i++) {
if (altered & (_shader->_mat_spec[i]._dep[0] | _shader->_mat_spec[i]._dep[1])) {
const LMatrix4 *val = gsg->fetch_specified_value(_shader->_mat_spec[i], altered);
if (!val) continue;
#ifndef STDFLOAT_DOUBLE
// In this case, the data is already single-precision.
const PN_float32 *data = val->get_data();
#else
// In this case, we have to convert it.
LMatrix4f valf = LCAST(PN_float32, *val);
const PN_float32 *data = valf.get_data();
#endif
if (_shader->get_language() == Shader::SL_GLSL) {
GLint p = _glsl_parameter_map[_shader->_mat_spec[i]._id._seqno];
switch (_shader->_mat_spec[i]._piece) {
case Shader::SMP_whole: gsg->_glUniformMatrix4fv(p, 1, GL_FALSE, data); continue;
case Shader::SMP_transpose: gsg->_glUniformMatrix4fv(p, 1, GL_TRUE, data); continue;
case Shader::SMP_col0: gsg->_glUniform4f(p, data[0], data[4], data[ 8], data[12]); continue;
case Shader::SMP_col1: gsg->_glUniform4f(p, data[1], data[5], data[ 9], data[13]); continue;
case Shader::SMP_col2: gsg->_glUniform4f(p, data[2], data[6], data[10], data[14]); continue;
case Shader::SMP_col3: gsg->_glUniform4f(p, data[3], data[7], data[11], data[15]); continue;
case Shader::SMP_row0: gsg->_glUniform4fv(p, 1, data+ 0); continue;
case Shader::SMP_row1: gsg->_glUniform4fv(p, 1, data+ 4); continue;
case Shader::SMP_row2: gsg->_glUniform4fv(p, 1, data+ 8); continue;
case Shader::SMP_row3: gsg->_glUniform4fv(p, 1, data+12); continue;
case Shader::SMP_row3x1: gsg->_glUniform1fv(p, 1, data+12); continue;
case Shader::SMP_row3x2: gsg->_glUniform2fv(p, 1, data+12); continue;
case Shader::SMP_row3x3: gsg->_glUniform3fv(p, 1, data+12); continue;
case Shader::SMP_upper3x3:
{
LMatrix3f upper3 = val->get_upper_3();
gsg->_glUniformMatrix3fv(p, 1, false, upper3.get_data());
continue;
}
case Shader::SMP_transpose3x3:
{
LMatrix3f upper3 = val->get_upper_3();
gsg->_glUniformMatrix3fv(p, 1, true, upper3.get_data());
continue;
}
}
}
#if defined(HAVE_CG) && !defined(OPENGLES)
else if (_shader->get_language() == Shader::SL_Cg) {
CGparameter p = _cg_parameter_map[_shader->_mat_spec[i]._id._seqno];
switch (_shader->_mat_spec[i]._piece) {
case Shader::SMP_whole: GLfc(cgGLSetMatrixParameter)(p, data); continue;
case Shader::SMP_transpose: GLfr(cgGLSetMatrixParameter)(p, data); continue;
case Shader::SMP_col0: GLf(cgGLSetParameter4)(p, data[0], data[4], data[ 8], data[12]); continue;
case Shader::SMP_col1: GLf(cgGLSetParameter4)(p, data[1], data[5], data[ 9], data[13]); continue;
case Shader::SMP_col2: GLf(cgGLSetParameter4)(p, data[2], data[6], data[10], data[14]); continue;
case Shader::SMP_col3: GLf(cgGLSetParameter4)(p, data[3], data[7], data[11], data[15]); continue;
case Shader::SMP_row0: GLfv(cgGLSetParameter4)(p, data+ 0); continue;
case Shader::SMP_row1: GLfv(cgGLSetParameter4)(p, data+ 4); continue;
case Shader::SMP_row2: GLfv(cgGLSetParameter4)(p, data+ 8); continue;
case Shader::SMP_row3: GLfv(cgGLSetParameter4)(p, data+12); continue;
case Shader::SMP_row3x1: GLfv(cgGLSetParameter1)(p, data+12); continue;
case Shader::SMP_row3x2: GLfv(cgGLSetParameter2)(p, data+12); continue;
case Shader::SMP_row3x3: GLfv(cgGLSetParameter3)(p, data+12); continue;
case Shader::SMP_upper3x3:
{
LMatrix3f upper3 = val->get_upper_3();
GLfc(cgGLSetMatrixParameter)(p, upper3.get_data());
continue;
}
case Shader::SMP_transpose3x3:
{
LMatrix3f upper3 = val->get_upper_3();
GLfr(cgGLSetMatrixParameter)(p, upper3.get_data());
continue;
}
}
}
#endif
}
}
#if defined(HAVE_CG) && !defined(OPENGLES)
cg_report_errors();
#endif
gsg->report_my_gl_errors();
}
////////////////////////////////////////////////////////////////////
// Function: GLShaderContext::disable_shader_vertex_arrays
// Access: Public
// Description: Disable all the vertex arrays used by this shader.
////////////////////////////////////////////////////////////////////
void CLP(ShaderContext)::
disable_shader_vertex_arrays(GSG *gsg) {
_last_gsg = gsg;
if (!valid()) {
return;
}
if (_shader->get_language() == Shader::SL_GLSL) {
for (int i=0; i<(int)_shader->_var_spec.size(); i++) {
gsg->_glDisableVertexAttribArray(i);
}
}
#if defined(HAVE_CG) && !defined(OPENGLES)
else if (_shader->get_language() == Shader::SL_Cg) {
for (int i=0; i<(int)_shader->_var_spec.size(); i++) {
CGparameter p = _cg_parameter_map[_shader->_var_spec[i]._id._seqno];
if (p == 0) continue;
cgGLDisableClientState(p);
}
cg_report_errors();
}
#endif
gsg->report_my_gl_errors();
}
////////////////////////////////////////////////////////////////////
// Function: GLShaderContext::update_shader_vertex_arrays
// Access: Public
// Description: Disables all vertex arrays used by the previous
// shader, then enables all the vertex arrays needed
// by this shader. Extracts the relevant vertex array
// data from the gsg.
// The current implementation is inefficient, because
// it may unnecessarily disable arrays then immediately
// reenable them. We may optimize this someday.
////////////////////////////////////////////////////////////////////
bool CLP(ShaderContext)::
update_shader_vertex_arrays(CLP(ShaderContext) *prev, GSG *gsg,
bool force) {
_last_gsg = gsg;
if (prev) prev->disable_shader_vertex_arrays(gsg);
if (!valid()) {
return true;
}
#if defined(HAVE_CG) && !defined(OPENGLES)
cg_report_errors();
#endif
#ifdef SUPPORT_IMMEDIATE_MODE
if (gsg->_use_sender) {
GLCAT.error() << "immediate mode shaders not implemented yet\n";
} else
#endif // SUPPORT_IMMEDIATE_MODE
{
const GeomVertexArrayDataHandle *array_reader;
Geom::NumericType numeric_type;
int start, stride, num_values;
int nvarying = _shader->_var_spec.size();
for (int i = 0; i < nvarying; ++i) {
#if defined(HAVE_CG) && !defined(OPENGLES)
if (_shader->get_language() == Shader::SL_Cg) {
if (_cg_parameter_map[_shader->_var_spec[i]._id._seqno] == 0) {
continue;
}
}
#endif
InternalName *name = _shader->_var_spec[i]._name;
int texslot = _shader->_var_spec[i]._append_uv;
if (texslot >= 0 && texslot < gsg->_state_texture->get_num_on_stages()) {
TextureStage *stage = gsg->_state_texture->get_on_stage(texslot);
InternalName *texname = stage->get_texcoord_name();
if (name == InternalName::get_texcoord()) {
name = texname;
} else if (texname != InternalName::get_texcoord()) {
name = name->append(texname->get_basename());
}
}
if (gsg->_data_reader->get_array_info(name,
array_reader, num_values, numeric_type,
start, stride)) {
const unsigned char *client_pointer;
if (!gsg->setup_array_data(client_pointer, array_reader, force)) {
return false;
}
if (_shader->get_language() == Shader::SL_GLSL) {
const GLint p = _glsl_parameter_map[_shader->_var_spec[i]._id._seqno];
gsg->_glEnableVertexAttribArray(p);
gsg->_glVertexAttribPointer(p, num_values, gsg->get_numeric_type(numeric_type),
GL_TRUE, stride, client_pointer + start);
#if defined(HAVE_CG) && !defined(OPENGLES)
} else if (_shader->get_language() == Shader::SL_Cg) {
CGparameter p = _cg_parameter_map[_shader->_var_spec[i]._id._seqno];
cgGLSetParameterPointer(p,
num_values, gsg->get_numeric_type(numeric_type),
stride, client_pointer + start);
cgGLEnableClientState(p);
#endif
}
}
#if defined(HAVE_CG) && !defined(OPENGLES)
else if (_shader->get_language() == Shader::SL_Cg) {
CGparameter p = _cg_parameter_map[_shader->_var_spec[i]._id._seqno];
cgGLDisableClientState(p);
}
#endif
}
}
#if defined(HAVE_CG) && !defined(OPENGLES)
cg_report_errors();
#endif
gsg->report_my_gl_errors();
return true;
}
////////////////////////////////////////////////////////////////////
// Function: GLShaderContext::disable_shader_texture_bindings
// Access: Public
// Description: Disable all the texture bindings used by this shader.
////////////////////////////////////////////////////////////////////
void CLP(ShaderContext)::
disable_shader_texture_bindings(GSG *gsg) {
_last_gsg = gsg;
if (!valid()) {
return;
}
#ifndef OPENGLES_2
for (int i=0; i<(int)_shader->_tex_spec.size(); i++) {
if (_shader->get_language() == Shader::SL_GLSL) {
if (_shader->_tex_spec[i]._name == 0) {
gsg->_glActiveTexture(GL_TEXTURE0 + _shader->_tex_spec[i]._stage);
} else {
gsg->_glActiveTexture(GL_TEXTURE0 + _shader->_tex_spec[i]._stage + _stage_offset);
}
#if defined(HAVE_CG) && !defined(OPENGLES)
} else if (_shader->get_language() == Shader::SL_Cg) {
CGparameter p = _cg_parameter_map[_shader->_tex_spec[i]._id._seqno];
if (p == 0) continue;
int texunit = cgGetParameterResourceIndex(p);
gsg->_glActiveTexture(GL_TEXTURE0 + texunit);
#endif
} else {
return;
}
#ifndef OPENGLES
GLP(BindTexture)(GL_TEXTURE_1D, 0);
#endif // OPENGLES
GLP(BindTexture)(GL_TEXTURE_2D, 0);
#ifndef OPENGLES_1
if (gsg->_supports_3d_texture) {
GLP(BindTexture)(GL_TEXTURE_3D, 0);
}
#endif // OPENGLES_1
#ifndef OPENGLES
if (gsg->_supports_2d_texture_array) {
GLP(BindTexture)(GL_TEXTURE_2D_ARRAY_EXT, 0);
}
#endif
if (gsg->_supports_cube_map) {
GLP(BindTexture)(GL_TEXTURE_CUBE_MAP, 0);
}
// This is probably faster - but maybe not as safe?
// cgGLDisableTextureParameter(p);
}
#endif // OPENGLES_2
_stage_offset = 0;
#if defined(HAVE_CG) && !defined(OPENGLES)
cg_report_errors();
#endif
gsg->report_my_gl_errors();
}
////////////////////////////////////////////////////////////////////
// Function: GLShaderContext::update_shader_texture_bindings
// Access: Public
// Description: Disables all texture bindings used by the previous
// shader, then enables all the texture bindings needed
// by this shader. Extracts the relevant vertex array
// data from the gsg.
// The current implementation is inefficient, because
// it may unnecessarily disable textures then immediately
// reenable them. We may optimize this someday.
////////////////////////////////////////////////////////////////////
void CLP(ShaderContext)::
update_shader_texture_bindings(CLP(ShaderContext) *prev, GSG *gsg) {
_last_gsg = gsg;
if (prev) {
prev->disable_shader_texture_bindings(gsg);
}
if (!valid()) {
return;
}
// We get the TextureAttrib directly from the _target_rs, not the
// filtered TextureAttrib in _target_texture.
const TextureAttrib *texattrib = DCAST(TextureAttrib, gsg->_target_rs->get_attrib_def(TextureAttrib::get_class_slot()));
nassertv(texattrib != (TextureAttrib *)NULL);
_stage_offset = texattrib->get_num_on_stages();
for (int i = 0; i < (int)_shader->_tex_spec.size(); ++i) {
InternalName *id = _shader->_tex_spec[i]._name;
int texunit;
if (_shader->get_language() == Shader::SL_GLSL) {
texunit = _shader->_tex_spec[i]._stage;
if (id != 0) {
texunit += _stage_offset;
}
}
#if defined(HAVE_CG) && !defined(OPENGLES)
else if (_shader->get_language() == Shader::SL_Cg) {
CGparameter p = _cg_parameter_map[_shader->_tex_spec[i]._id._seqno];
if (p == 0) {
continue;
}
texunit = cgGetParameterResourceIndex(p);
}
#endif
Texture *tex = 0;
int view = gsg->get_current_tex_view_offset();
if (id != 0) {
const ShaderInput *input = gsg->_target_shader->get_shader_input(id);
tex = input->get_texture();
} else {
if (_shader->_tex_spec[i]._stage >= texattrib->get_num_on_stages()) {
continue;
}
TextureStage *stage = texattrib->get_on_stage(_shader->_tex_spec[i]._stage);
tex = texattrib->get_on_texture(stage);
view += stage->get_tex_view_offset();
}
if (_shader->_tex_spec[i]._suffix != 0) {
// The suffix feature is inefficient. It is a temporary hack.
if (tex == 0) {
continue;
}
tex = tex->load_related(_shader->_tex_spec[i]._suffix);
}
if ((tex == 0) || (tex->get_texture_type() != _shader->_tex_spec[i]._desired_type)) {
continue;
}
gsg->_glActiveTexture(GL_TEXTURE0 + texunit);
TextureContext *tc = tex->prepare_now(view, gsg->_prepared_objects, gsg);
if (tc == (TextureContext*)NULL) {
continue;
}
GLenum target = gsg->get_texture_target(tex->get_texture_type());
if (target == GL_NONE) {
// Unsupported texture mode.
continue;
}
if (_shader->get_language() == Shader::SL_GLSL) {
GLint p = _glsl_parameter_map[_shader->_tex_spec[i]._id._seqno];
gsg->_glUniform1i(p, texunit);
}
if (!gsg->update_texture(tc, false)) {
continue;
}
}
#if defined(HAVE_CG) && !defined(OPENGLES)
cg_report_errors();
#endif
gsg->report_my_gl_errors();
}
////////////////////////////////////////////////////////////////////
// Function: Shader::glsl_report_shader_errors
// Access: Private
// Description: This subroutine prints the infolog for a shader.
////////////////////////////////////////////////////////////////////
void CLP(ShaderContext)::
glsl_report_shader_errors(GSG *gsg, unsigned int shader) {
char *info_log;
GLint length = 0;
GLint num_chars = 0;
gsg->_glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &length);
if (length > 1) {
info_log = (char *) malloc(length);
gsg->_glGetShaderInfoLog(shader, length, &num_chars, info_log);
if (strcmp(info_log, "Success.\n") != 0 && strcmp(info_log, "No errors.\n") != 0) {
GLCAT.error(false) << info_log << "\n";
}
free(info_log);
}
}
////////////////////////////////////////////////////////////////////
// Function: Shader::glsl_report_program_errors
// Access: Private
// Description: This subroutine prints the infolog for a program.
////////////////////////////////////////////////////////////////////
void CLP(ShaderContext)::
glsl_report_program_errors(GSG *gsg, unsigned int program) {
char *info_log;
GLint length = 0;
GLint num_chars = 0;
gsg->_glGetProgramiv(program, GL_INFO_LOG_LENGTH, &length);
if (length > 1) {
info_log = (char *) malloc(length);
gsg->_glGetProgramInfoLog(program, length, &num_chars, info_log);
if (strcmp(info_log, "Success.\n") != 0 && strcmp(info_log, "No errors.\n") != 0) {
GLCAT.error(false) << info_log << "\n";
}
free(info_log);
}
}
////////////////////////////////////////////////////////////////////
// Function: Shader::glsl_compile_entry_point
// Access: Private
// Description:
////////////////////////////////////////////////////////////////////
unsigned int CLP(ShaderContext)::
glsl_compile_entry_point(GSG *gsg, Shader::ShaderType type) {
unsigned int handle = 0;
switch (type) {
case Shader::ST_vertex:
handle = gsg->_glCreateShader(GL_VERTEX_SHADER);
break;
case Shader::ST_fragment:
handle = gsg->_glCreateShader(GL_FRAGMENT_SHADER);
break;
#ifndef OPENGLES
case Shader::ST_geometry:
if (gsg->get_supports_geometry_shaders()) {
handle = gsg->_glCreateShader(GL_GEOMETRY_SHADER);
}
break;
case Shader::ST_tess_control:
if (gsg->get_supports_tessellation_shaders()) {
handle = gsg->_glCreateShader(GL_TESS_CONTROL_SHADER);
}
break;
case Shader::ST_tess_evaluation:
if (gsg->get_supports_tessellation_shaders()) {
handle = gsg->_glCreateShader(GL_TESS_EVALUATION_SHADER);
}
break;
#endif
}
if (!handle) {
gsg->report_my_gl_errors();
return 0;
}
string text_str = _shader->get_text(type);
const char* text = text_str.c_str();
gsg->_glShaderSource(handle, 1, &text, NULL);
gsg->_glCompileShader(handle);
GLint status;
gsg->_glGetShaderiv(handle, GL_COMPILE_STATUS, &status);
if (status != GL_TRUE) {
GLCAT.error()
<< "An error occurred while compiling shader "
<< _shader->get_filename(type) << "\n";
glsl_report_shader_errors(gsg, handle);
gsg->_glDeleteShader(handle);
gsg->report_my_gl_errors();
return 0;
}
gsg->report_my_gl_errors();
return handle;
}
////////////////////////////////////////////////////////////////////
// Function: Shader::glsl_compile_shader
// Access: Private
// Description: This subroutine compiles a GLSL shader.
////////////////////////////////////////////////////////////////////
bool CLP(ShaderContext)::
glsl_compile_shader(GSG *gsg) {
_glsl_program = gsg->_glCreateProgram();
if (!_glsl_program) return false;
if (!_shader->get_text(Shader::ST_vertex).empty()) {
_glsl_vshader = glsl_compile_entry_point(gsg, Shader::ST_vertex);
if (!_glsl_vshader) return false;
gsg->_glAttachShader(_glsl_program, _glsl_vshader);
}
if (!_shader->get_text(Shader::ST_fragment).empty()) {
_glsl_fshader = glsl_compile_entry_point(gsg, Shader::ST_fragment);
if (!_glsl_fshader) return false;
gsg->_glAttachShader(_glsl_program, _glsl_fshader);
}
if (!_shader->get_text(Shader::ST_geometry).empty()) {
_glsl_gshader = glsl_compile_entry_point(gsg, Shader::ST_geometry);
if (!_glsl_gshader) return false;
gsg->_glAttachShader(_glsl_program, _glsl_gshader);
#ifdef OPENGLES
nassertr(false, false); // OpenGL ES has no geometry shaders.
#else
// Set the vertex output limit to the maximum
nassertr(gsg->_glProgramParameteri != NULL, false);
GLint max_vertices;
glGetIntegerv(GL_MAX_GEOMETRY_OUTPUT_VERTICES, &max_vertices);
gsg->_glProgramParameteri(_glsl_program, GL_GEOMETRY_VERTICES_OUT_ARB, max_vertices);
#endif
gsg->report_my_gl_errors();
}
if (!_shader->get_text(Shader::ST_tess_control).empty()) {
_glsl_tcshader = glsl_compile_entry_point(gsg, Shader::ST_tess_control);
if (!_glsl_tcshader) return false;
gsg->_glAttachShader(_glsl_program, _glsl_tcshader);
}
if (!_shader->get_text(Shader::ST_tess_evaluation).empty()) {
_glsl_teshader = glsl_compile_entry_point(gsg, Shader::ST_tess_evaluation);
if (!_glsl_teshader) return false;
gsg->_glAttachShader(_glsl_program, _glsl_teshader);
}
// There might be warnings. Only report them for one shader program.
if (_glsl_vshader != 0) {
glsl_report_shader_errors(gsg, _glsl_vshader);
} else if (_glsl_fshader != 0) {
glsl_report_shader_errors(gsg, _glsl_fshader);
} else if (_glsl_gshader != 0) {
glsl_report_shader_errors(gsg, _glsl_gshader);
} else if (_glsl_tcshader != 0) {
glsl_report_shader_errors(gsg, _glsl_tcshader);
} else if (_glsl_teshader != 0) {
glsl_report_shader_errors(gsg, _glsl_teshader);
}
gsg->_glLinkProgram(_glsl_program);
GLint status;
gsg->_glGetProgramiv(_glsl_program, GL_LINK_STATUS, &status);
if (status != GL_TRUE) {
GLCAT.error() << "An error occurred while linking shader program!\n";
glsl_report_program_errors(gsg, _glsl_program);
return false;
}
gsg->report_my_gl_errors();
return true;
}
#endif // OPENGLES_1
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