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Move Cg calls out of GSG reset() function - do profile detection entirely without Cg functions

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This commit is contained in:
rdb 2015-07-20 19:59:26 +02:00
parent 9034682718
commit 3ad274639d
2 changed files with 110 additions and 68 deletions
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15
panda/src/glstuff/glCgShaderContext_src.cxx
View File

@ -49,7 +49,20 @@ CLP(CgShaderContext)(CLP(GraphicsStateGuardian) *glgsg, Shader *s) : ShaderConte
nassertv(s->get_language() == Shader::SL_Cg);
CGcontext context = _glgsg->_cg_context;
// Get a Cg context for this GSG.
CGcontext context = glgsg->_cg_context;
if (context == 0) {
// The GSG doesn't have a Cg context yet. Create one.
glgsg->_cg_context = context = cgCreateContext();
#if CG_VERSION_NUM >= 3100
// This just sounds like a good thing to do.
cgGLSetContextGLSLVersion(context, cgGLDetectGLSLVersion());
if (glgsg->_shader_caps._active_vprofile == CG_PROFILE_GLSLV) {
cgGLSetContextOptimalOptions(context, CG_PROFILE_GLSLC);
}
#endif
}
// Ask the shader to compile itself for us and
// to give us the resulting Cg program objects.

163
panda/src/glstuff/glGraphicsStateGuardian_src.cxx
View File

@ -1269,63 +1269,7 @@ reset() {
}
}
#if defined(HAVE_CG) && !defined(OPENGLES)
if (cgGLIsProfileSupported(CG_PROFILE_ARBFP1) &&
cgGLIsProfileSupported(CG_PROFILE_ARBVP1)) {
_supports_basic_shaders = true;
if (basic_shaders_only) {
_shader_caps._active_vprofile = (int)CG_PROFILE_ARBVP1;
_shader_caps._active_fprofile = (int)CG_PROFILE_ARBFP1;
_shader_caps._active_gprofile = (int)CG_PROFILE_UNKNOWN; // No geometry shader if only using basic
} else {
_shader_caps._active_vprofile = (int)cgGLGetLatestProfile(CG_GL_VERTEX);
_shader_caps._active_fprofile = (int)cgGLGetLatestProfile(CG_GL_FRAGMENT);
_shader_caps._active_gprofile = (int)cgGLGetLatestProfile(CG_GL_GEOMETRY);
// cgGLGetLatestProfile doesn't seem to return anything other
// arbvp1/arbfp1 on non-NVIDIA cards, which is severely limiting.
// So, if this happens, we set it to GLSL, which is
// usually supported on all cards.
// The GLSL profiles are horribly broken on non-NVIDIA cards, but
// I think I've worked around the issues sufficiently.
if ((_shader_caps._active_vprofile == CG_PROFILE_ARBVP1 ||
_shader_caps._active_fprofile == CG_PROFILE_ARBFP1) &&
cgGLIsProfileSupported(CG_PROFILE_GLSLV) &&
cgGLIsProfileSupported(CG_PROFILE_GLSLF)) {
_shader_caps._active_vprofile = (int)CG_PROFILE_GLSLV;
_shader_caps._active_fprofile = (int)CG_PROFILE_GLSLF;
#if CG_VERSION_NUM >= 2200
if (cgGLIsProfileSupported(CG_PROFILE_GLSLG)) {
_shader_caps._active_gprofile = (int)CG_PROFILE_GLSLG;
}
#endif
}
}
_shader_caps._ultimate_vprofile = (int)CG_PROFILE_VP40;
_shader_caps._ultimate_fprofile = (int)CG_PROFILE_FP40;
_shader_caps._ultimate_gprofile = (int)CG_PROFILE_GPU_GP;
_cg_context = cgCreateContext();
#if CG_VERSION_NUM >= 3100
// This just sounds like a good thing to do.
cgGLSetContextGLSLVersion(_cg_context, cgGLDetectGLSLVersion());
if (_shader_caps._active_vprofile == CG_PROFILE_GLSLV) {
cgGLSetContextOptimalOptions(_cg_context, CG_PROFILE_GLSLC);
}
#endif
// Bug workaround for radeons.
if (_shader_caps._active_fprofile == CG_PROFILE_ARBFP1) {
if (has_extension("GL_ATI_draw_buffers")) {
_shader_caps._bug_list.insert(Shader::SBUG_ati_draw_buffers);
}
}
}
#endif // HAVE_CG
// Check for GLSL support.
#if defined(OPENGLES_1)
_supports_glsl = false;
_supports_geometry_shaders = false;
@ -1335,7 +1279,7 @@ reset() {
_supports_geometry_shaders = false;
_supports_tessellation_shaders = false;
#else
_supports_glsl = is_at_least_gl_version(2, 0) || has_extension("GL_ARB_shading_language_100");
_supports_glsl = (_gl_shadlang_ver_major >= 1);
_supports_tessellation_shaders = is_at_least_gl_version(4, 0) || has_extension("GL_ARB_tessellation_shader");
if (is_at_least_gl_version(3, 2)) {
@ -1363,6 +1307,79 @@ reset() {
#endif
_shader_caps._supports_glsl = _supports_glsl;
// Check for support for other types of shaders that can be used by Cg.
_supports_basic_shaders = false;
#if defined(HAVE_CG) && !defined(OPENGLES)
if (has_extension("GL_ARB_vertex_program") &&
has_extension("GL_ARB_fragment_program")) {
_supports_basic_shaders = true;
_shader_caps._active_vprofile = (int)CG_PROFILE_ARBVP1;
_shader_caps._active_fprofile = (int)CG_PROFILE_ARBFP1;
_shader_caps._active_gprofile = (int)CG_PROFILE_UNKNOWN; // No geometry shader if only using basic
if (basic_shaders_only) {
// We're happy with ARB programs, thanks.
} else if (has_extension("GL_NV_gpu_program5")) {
_shader_caps._active_vprofile = (int)CG_PROFILE_GP5VP;
_shader_caps._active_fprofile = (int)CG_PROFILE_GP5FP;
_shader_caps._active_gprofile = (int)CG_PROFILE_GP5GP;
} else if (has_extension("GL_NV_gpu_program4")) {
_shader_caps._active_vprofile = (int)CG_PROFILE_GP4VP;
_shader_caps._active_fprofile = (int)CG_PROFILE_GP4FP;
_shader_caps._active_gprofile = (int)CG_PROFILE_GP4GP;
} else if (has_extension("GL_NV_vertex_program3") &&
has_extension("GL_NV_fragment_program2")) {
_shader_caps._active_vprofile = (int)CG_PROFILE_VP40;
_shader_caps._active_fprofile = (int)CG_PROFILE_FP40;
_shader_caps._active_gprofile = (int)CG_PROFILE_UNKNOWN;
} else if (has_extension("GL_NV_vertex_program2") &&
has_extension("GL_NV_fragment_program")) {
_shader_caps._active_vprofile = (int)CG_PROFILE_VP30;
_shader_caps._active_fprofile = (int)CG_PROFILE_FP30;
_shader_caps._active_gprofile = (int)CG_PROFILE_UNKNOWN;
} else if (has_extension("GL_NV_vertex_program1_1") &&
has_extension("GL_NV_texture_shader2") &&
has_extension("GL_NV_register_combiners2")) {
_shader_caps._active_vprofile = (int)CG_PROFILE_VP20;
_shader_caps._active_fprofile = (int)CG_PROFILE_FP20;
_shader_caps._active_gprofile = (int)CG_PROFILE_UNKNOWN;
} else if (_supports_glsl) {
// This is what will be available to non-NVIDIA cards. It is the last
// option since it is slower to compile GLSL than the other options.
_shader_caps._active_vprofile = (int)CG_PROFILE_GLSLV;
_shader_caps._active_fprofile = (int)CG_PROFILE_GLSLF;
if (_supports_geometry_shaders) {
_shader_caps._active_gprofile = (int)CG_PROFILE_GLSLG;
}
}
_shader_caps._ultimate_vprofile = (int)CG_PROFILE_VP40;
_shader_caps._ultimate_fprofile = (int)CG_PROFILE_FP40;
_shader_caps._ultimate_gprofile = (int)CG_PROFILE_GPU_GP;
// Bug workaround for radeons.
if (_shader_caps._active_fprofile == CG_PROFILE_ARBFP1) {
if (has_extension("GL_ATI_draw_buffers")) {
_shader_caps._bug_list.insert(Shader::SBUG_ati_draw_buffers);
}
}
} else if (_supports_glsl) {
// No, but we do support GLSL...
_shader_caps._active_vprofile = (int)CG_PROFILE_GLSLV;
_shader_caps._active_fprofile = (int)CG_PROFILE_GLSLF;
if (_supports_geometry_shaders) {
_shader_caps._active_gprofile = (int)CG_PROFILE_GLSLG;
} else {
_shader_caps._active_gprofile = (int)CG_PROFILE_UNKNOWN;
}
}
#endif // HAVE_CG
_supports_compute_shaders = false;
#ifndef OPENGLES
if (is_at_least_gl_version(4, 3) || has_extension("GL_ARB_compute_shader")) {
@ -2517,19 +2534,31 @@ reset() {
#endif // CG_VERSION_NUM >= 2200
#if CG_VERSION_NUM >= 3100
CGGLglslversion ver = cgGLGetContextGLSLVersion(_cg_context);
GLCAT.debug()
<< "Cg GLSL version: " << cgGLGetGLSLVersionString(ver) << "\n";
GLCAT.debug() << "Cg GLSL version = "
<< cgGLGetGLSLVersionString(cgGLDetectGLSLVersion()) << "\n";
#endif
CGprofile vertex_profile = cgGLGetLatestProfile(CG_GL_VERTEX);
CGprofile pixel_profile = cgGLGetLatestProfile(CG_GL_FRAGMENT);
GLCAT.debug()
<< "Cg latest vertex profile = " << cgGetProfileString(vertex_profile)
<< " (" << vertex_profile << ")\n";
<< "Cg latest vertex profile = "
<< cgGetProfileString(cgGLGetLatestProfile(CG_GL_VERTEX)) << "\n";
GLCAT.debug()
<< "Cg latest pixel profile = " << cgGetProfileString(pixel_profile)
<< " (" << pixel_profile << ")\n";
<< "Cg latest fragment profile = "
<< cgGetProfileString(cgGLGetLatestProfile(CG_GL_FRAGMENT)) << "\n";
#if CG_VERSION_NUM >= 2000
GLCAT.debug()
<< "Cg latest geometry profile = "
<< cgGetProfileString(cgGLGetLatestProfile(CG_GL_GEOMETRY)) << "\n";
#endif
GLCAT.debug() << "basic-shaders-only " << basic_shaders_only << "\n";
GLCAT.debug()
<< "Cg active vertex profile = "
<< cgGetProfileString((CGprofile)_shader_caps._active_vprofile) << "\n";
GLCAT.debug()
<< "Cg active fragment profile = "
<< cgGetProfileString((CGprofile)_shader_caps._active_fprofile) << "\n";
GLCAT.debug()
<< "Cg active geometry profile = "
<< cgGetProfileString((CGprofile)_shader_caps._active_gprofile) << "\n";
#endif // HAVE_CG
GLCAT.debug() << "shader model = " << _shader_model << "\n";