diff options
Diffstat (limited to 'src/mesa')
| -rw-r--r-- | src/mesa/main/pipelineobj.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/src/mesa/main/pipelineobj.c b/src/mesa/main/pipelineobj.c index 849c7818d1f..b639e9bc913 100644 --- a/src/mesa/main/pipelineobj.c +++ b/src/mesa/main/pipelineobj.c @@ -222,6 +222,108 @@ _mesa_reference_pipeline_object_(struct gl_context *ctx, void GLAPIENTRY _mesa_UseProgramStages(GLuint pipeline, GLbitfield stages, GLuint program) { + GET_CURRENT_CONTEXT(ctx); + + struct gl_pipeline_object *pipe = lookup_pipeline_object(ctx, pipeline); + struct gl_shader_program *shProg = NULL; + + if (!pipe) { + _mesa_error(ctx, GL_INVALID_OPERATION, "glUseProgramStages(pipeline)"); + return; + } + + /* Object is created by any Pipeline call but glGenProgramPipelines, + * glIsProgramPipeline and GetProgramPipelineInfoLog + */ + pipe->EverBound = GL_TRUE; + + /* Section 2.11.4 (Program Pipeline Objects) of the OpenGL 4.1 spec says: + * + * "If stages is not the special value ALL_SHADER_BITS, and has a bit + * set that is not recognized, the error INVALID_VALUE is generated." + * + * NOT YET SUPPORTED: + * GL_TESS_CONTROL_SHADER_BIT + * GL_TESS_EVALUATION_SHADER_BIT + */ + GLbitfield any_valid_stages = GL_VERTEX_SHADER_BIT | GL_FRAGMENT_SHADER_BIT; + if (_mesa_has_geometry_shaders(ctx)) + any_valid_stages |= GL_GEOMETRY_SHADER_BIT; + + if (stages != GL_ALL_SHADER_BITS && (stages & ~any_valid_stages) != 0) { + _mesa_error(ctx, GL_INVALID_VALUE, "glUseProgramStages(Stages)"); + return; + } + + /* Section 2.17.2 (Transform Feedback Primitive Capture) of the OpenGL 4.1 + * spec says: + * + * "The error INVALID_OPERATION is generated: + * + * ... + * + * - by UseProgramStages if the program pipeline object it refers + * to is current and the current transform feedback object is + * active and not paused; + */ + if (ctx->_Shader == pipe) { + if (_mesa_is_xfb_active_and_unpaused(ctx)) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glUseProgramStages(transform feedback active)"); + return; + } + } + + if (program) { + shProg = _mesa_lookup_shader_program_err(ctx, program, + "glUseProgramStages"); + if (shProg == NULL) + return; + + /* Section 2.11.4 (Program Pipeline Objects) of the OpenGL 4.1 spec + * says: + * + * "If the program object named by program was linked without the + * PROGRAM_SEPARABLE parameter set, or was not linked successfully, + * the error INVALID_OPERATION is generated and the corresponding + * shader stages in the pipeline program pipeline object are not + * modified." + */ + if (!shProg->LinkStatus) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glUseProgramStages(program not linked)"); + return; + } + + if (!shProg->SeparateShader) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glUseProgramStages(program wasn't linked with the " + "PROGRAM_SEPARABLE flag)"); + return; + } + } + + /* Enable individual stages from the program as requested by the + * application. If there is no shader for a requested stage in the + * program, _mesa_use_shader_program will enable fixed-function processing + * as dictated by the spec. + * + * Section 2.11.4 (Program Pipeline Objects) of the OpenGL 4.1 spec + * says: + * + * "If UseProgramStages is called with program set to zero or with a + * program object that contains no executable code for the given + * stages, it is as if the pipeline object has no programmable stage + * configured for the indicated shader stages." + */ + if ((stages & GL_VERTEX_SHADER_BIT) != 0) + _mesa_use_shader_program(ctx, GL_VERTEX_SHADER, shProg, pipe); + + if ((stages & GL_FRAGMENT_SHADER_BIT) != 0) + _mesa_use_shader_program(ctx, GL_FRAGMENT_SHADER, shProg, pipe); + + if ((stages & GL_GEOMETRY_SHADER_BIT) != 0) + _mesa_use_shader_program(ctx, GL_GEOMETRY_SHADER, shProg, pipe); } /** |