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Diffstat (limited to 'src/mesa/main/shaderobj.c')
| -rw-r--r-- | src/mesa/main/shaderobj.c | 390 |
1 files changed, 390 insertions, 0 deletions
diff --git a/src/mesa/main/shaderobj.c b/src/mesa/main/shaderobj.c new file mode 100644 index 00000000000..129d9742247 --- /dev/null +++ b/src/mesa/main/shaderobj.c @@ -0,0 +1,390 @@ +/* + * Mesa 3-D graphics library + * + * Copyright (C) 2004-2008 Brian Paul All Rights Reserved. + * Copyright (C) 2009-2010 VMware, Inc. All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN + * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +/** + * \file shaderobj.c + * \author Brian Paul + * + */ + + +#include "main/glheader.h" +#include "main/context.h" +#include "main/hash.h" +#include "main/shaderobj.h" +#include "program/program.h" +#include "program/prog_parameter.h" +#include "program/prog_uniform.h" +#include "talloc.h" + +/**********************************************************************/ +/*** Shader object functions ***/ +/**********************************************************************/ + + +/** + * Set ptr to point to sh. + * If ptr is pointing to another shader, decrement its refcount (and delete + * if refcount hits zero). + * Then set ptr to point to sh, incrementing its refcount. + */ +void +_mesa_reference_shader(GLcontext *ctx, struct gl_shader **ptr, + struct gl_shader *sh) +{ + assert(ptr); + if (*ptr == sh) { + /* no-op */ + return; + } + if (*ptr) { + /* Unreference the old shader */ + GLboolean deleteFlag = GL_FALSE; + struct gl_shader *old = *ptr; + + ASSERT(old->RefCount > 0); + old->RefCount--; + /*printf("SHADER DECR %p (%d) to %d\n", + (void*) old, old->Name, old->RefCount);*/ + deleteFlag = (old->RefCount == 0); + + if (deleteFlag) { + _mesa_HashRemove(ctx->Shared->ShaderObjects, old->Name); + ctx->Driver.DeleteShader(ctx, old); + } + + *ptr = NULL; + } + assert(!*ptr); + + if (sh) { + /* reference new */ + sh->RefCount++; + /*printf("SHADER INCR %p (%d) to %d\n", + (void*) sh, sh->Name, sh->RefCount);*/ + *ptr = sh; + } +} + + +/** + * Allocate a new gl_shader object, initialize it. + * Called via ctx->Driver.NewShader() + */ +struct gl_shader * +_mesa_new_shader(GLcontext *ctx, GLuint name, GLenum type) +{ + struct gl_shader *shader; + assert(type == GL_FRAGMENT_SHADER || type == GL_VERTEX_SHADER || + type == GL_GEOMETRY_SHADER_ARB); + shader = talloc_zero(NULL, struct gl_shader); + if (shader) { + shader->Type = type; + shader->Name = name; + shader->RefCount = 1; + } + return shader; +} + + +/** + * Delete a shader object. + * Called via ctx->Driver.DeleteShader(). + */ +static void +__mesa_delete_shader(GLcontext *ctx, struct gl_shader *sh) +{ + if (sh->Source) + free((void *) sh->Source); + _mesa_reference_program(ctx, &sh->Program, NULL); + talloc_free(sh); +} + + +/** + * Lookup a GLSL shader object. + */ +struct gl_shader * +_mesa_lookup_shader(GLcontext *ctx, GLuint name) +{ + if (name) { + struct gl_shader *sh = (struct gl_shader *) + _mesa_HashLookup(ctx->Shared->ShaderObjects, name); + /* Note that both gl_shader and gl_shader_program objects are kept + * in the same hash table. Check the object's type to be sure it's + * what we're expecting. + */ + if (sh && sh->Type == GL_SHADER_PROGRAM_MESA) { + return NULL; + } + return sh; + } + return NULL; +} + + +/** + * As above, but record an error if shader is not found. + */ +struct gl_shader * +_mesa_lookup_shader_err(GLcontext *ctx, GLuint name, const char *caller) +{ + if (!name) { + _mesa_error(ctx, GL_INVALID_VALUE, caller); + return NULL; + } + else { + struct gl_shader *sh = (struct gl_shader *) + _mesa_HashLookup(ctx->Shared->ShaderObjects, name); + if (!sh) { + _mesa_error(ctx, GL_INVALID_VALUE, caller); + return NULL; + } + if (sh->Type == GL_SHADER_PROGRAM_MESA) { + _mesa_error(ctx, GL_INVALID_OPERATION, caller); + return NULL; + } + return sh; + } +} + + + +/**********************************************************************/ +/*** Shader Program object functions ***/ +/**********************************************************************/ + + +/** + * Set ptr to point to shProg. + * If ptr is pointing to another object, decrement its refcount (and delete + * if refcount hits zero). + * Then set ptr to point to shProg, incrementing its refcount. + */ +void +_mesa_reference_shader_program(GLcontext *ctx, + struct gl_shader_program **ptr, + struct gl_shader_program *shProg) +{ + assert(ptr); + if (*ptr == shProg) { + /* no-op */ + return; + } + if (*ptr) { + /* Unreference the old shader program */ + GLboolean deleteFlag = GL_FALSE; + struct gl_shader_program *old = *ptr; + + ASSERT(old->RefCount > 0); + old->RefCount--; +#if 0 + printf("ShaderProgram %p ID=%u RefCount-- to %d\n", + (void *) old, old->Name, old->RefCount); +#endif + deleteFlag = (old->RefCount == 0); + + if (deleteFlag) { + _mesa_HashRemove(ctx->Shared->ShaderObjects, old->Name); + ctx->Driver.DeleteShaderProgram(ctx, old); + } + + *ptr = NULL; + } + assert(!*ptr); + + if (shProg) { + shProg->RefCount++; +#if 0 + printf("ShaderProgram %p ID=%u RefCount++ to %d\n", + (void *) shProg, shProg->Name, shProg->RefCount); +#endif + *ptr = shProg; + } +} + + +/** + * Allocate a new gl_shader_program object, initialize it. + * Called via ctx->Driver.NewShaderProgram() + */ +static struct gl_shader_program * +_mesa_new_shader_program(GLcontext *ctx, GLuint name) +{ + struct gl_shader_program *shProg; + shProg = talloc_zero(NULL, struct gl_shader_program); + if (shProg) { + shProg->Type = GL_SHADER_PROGRAM_MESA; + shProg->Name = name; + shProg->RefCount = 1; + shProg->Attributes = _mesa_new_parameter_list(); +#if FEATURE_ARB_geometry_shader4 + shProg->Geom.VerticesOut = 0; + shProg->Geom.InputType = GL_TRIANGLES; + shProg->Geom.OutputType = GL_TRIANGLE_STRIP; +#endif + } + return shProg; +} + + +/** + * Clear (free) the shader program state that gets produced by linking. + */ +void +_mesa_clear_shader_program_data(GLcontext *ctx, + struct gl_shader_program *shProg) +{ + _mesa_reference_vertprog(ctx, &shProg->VertexProgram, NULL); + _mesa_reference_fragprog(ctx, &shProg->FragmentProgram, NULL); + _mesa_reference_geomprog(ctx, &shProg->GeometryProgram, NULL); + + if (shProg->Uniforms) { + _mesa_free_uniform_list(shProg->Uniforms); + shProg->Uniforms = NULL; + } + + if (shProg->Varying) { + _mesa_free_parameter_list(shProg->Varying); + shProg->Varying = NULL; + } +} + + +/** + * Free all the data that hangs off a shader program object, but not the + * object itself. + */ +void +_mesa_free_shader_program_data(GLcontext *ctx, + struct gl_shader_program *shProg) +{ + GLuint i; + + assert(shProg->Type == GL_SHADER_PROGRAM_MESA); + + _mesa_clear_shader_program_data(ctx, shProg); + + if (shProg->Attributes) { + _mesa_free_parameter_list(shProg->Attributes); + shProg->Attributes = NULL; + } + + /* detach shaders */ + for (i = 0; i < shProg->NumShaders; i++) { + _mesa_reference_shader(ctx, &shProg->Shaders[i], NULL); + } + shProg->NumShaders = 0; + + if (shProg->Shaders) { + free(shProg->Shaders); + shProg->Shaders = NULL; + } + + if (shProg->InfoLog) { + talloc_free(shProg->InfoLog); + shProg->InfoLog = NULL; + } + + /* Transform feedback varying vars */ + for (i = 0; i < shProg->TransformFeedback.NumVarying; i++) { + free(shProg->TransformFeedback.VaryingNames[i]); + } + free(shProg->TransformFeedback.VaryingNames); + shProg->TransformFeedback.VaryingNames = NULL; + shProg->TransformFeedback.NumVarying = 0; +} + + +/** + * Free/delete a shader program object. + * Called via ctx->Driver.DeleteShaderProgram(). + */ +static void +__mesa_delete_shader_program(GLcontext *ctx, struct gl_shader_program *shProg) +{ + _mesa_free_shader_program_data(ctx, shProg); + + talloc_free(shProg); +} + + +/** + * Lookup a GLSL program object. + */ +struct gl_shader_program * +_mesa_lookup_shader_program(GLcontext *ctx, GLuint name) +{ + struct gl_shader_program *shProg; + if (name) { + shProg = (struct gl_shader_program *) + _mesa_HashLookup(ctx->Shared->ShaderObjects, name); + /* Note that both gl_shader and gl_shader_program objects are kept + * in the same hash table. Check the object's type to be sure it's + * what we're expecting. + */ + if (shProg && shProg->Type != GL_SHADER_PROGRAM_MESA) { + return NULL; + } + return shProg; + } + return NULL; +} + + +/** + * As above, but record an error if program is not found. + */ +struct gl_shader_program * +_mesa_lookup_shader_program_err(GLcontext *ctx, GLuint name, + const char *caller) +{ + if (!name) { + _mesa_error(ctx, GL_INVALID_VALUE, caller); + return NULL; + } + else { + struct gl_shader_program *shProg = (struct gl_shader_program *) + _mesa_HashLookup(ctx->Shared->ShaderObjects, name); + if (!shProg) { + _mesa_error(ctx, GL_INVALID_VALUE, caller); + return NULL; + } + if (shProg->Type != GL_SHADER_PROGRAM_MESA) { + _mesa_error(ctx, GL_INVALID_OPERATION, caller); + return NULL; + } + return shProg; + } +} + + +void +_mesa_init_shader_object_functions(struct dd_function_table *driver) +{ + driver->NewShader = _mesa_new_shader; + driver->DeleteShader = __mesa_delete_shader; + driver->NewShaderProgram = _mesa_new_shader_program; + driver->DeleteShaderProgram = __mesa_delete_shader_program; +} |