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Diffstat (limited to 'src/mesa/main/shaderapi.c')
| -rw-r--r-- | src/mesa/main/shaderapi.c | 1552 |
1 files changed, 1552 insertions, 0 deletions
diff --git a/src/mesa/main/shaderapi.c b/src/mesa/main/shaderapi.c new file mode 100644 index 00000000000..88edb541ac6 --- /dev/null +++ b/src/mesa/main/shaderapi.c @@ -0,0 +1,1552 @@ +/* + * 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 shaderapi.c + * \author Brian Paul + * + * Implementation of GLSL-related API functions. + * The glUniform* functions are in uniforms.c + * + * + * XXX things to do: + * 1. Check that the right error code is generated for all _mesa_error() calls. + * 2. Insert FLUSH_VERTICES calls in various places + */ + + +#include "main/glheader.h" +#include "main/context.h" +#include "main/dispatch.h" +#include "main/hash.h" +#include "main/shaderapi.h" +#include "main/shaderobj.h" +#include "shader/program.h" +#include "shader/prog_parameter.h" +#include "shader/prog_uniform.h" +#include "shader/slang/slang_compile.h" +#include "shader/slang/slang_link.h" + + +/** Define this to enable shader substitution (see below) */ +#define SHADER_SUBST 0 + + +/** + * Return mask of GLSL_x flags by examining the MESA_GLSL env var. + */ +static GLbitfield +get_shader_flags(void) +{ + GLbitfield flags = 0x0; + const char *env = _mesa_getenv("MESA_GLSL"); + + if (env) { + if (strstr(env, "dump")) + flags |= GLSL_DUMP; + if (strstr(env, "log")) + flags |= GLSL_LOG; + if (strstr(env, "nopvert")) + flags |= GLSL_NOP_VERT; + if (strstr(env, "nopfrag")) + flags |= GLSL_NOP_FRAG; + if (strstr(env, "nopt")) + flags |= GLSL_NO_OPT; + else if (strstr(env, "opt")) + flags |= GLSL_OPT; + if (strstr(env, "uniform")) + flags |= GLSL_UNIFORMS; + if (strstr(env, "useprog")) + flags |= GLSL_USE_PROG; + } + + return flags; +} + + +/** + * Initialize context's shader state. + */ +void +_mesa_init_shader_state(GLcontext *ctx) +{ + /* Device drivers may override these to control what kind of instructions + * are generated by the GLSL compiler. + */ + ctx->Shader.EmitHighLevelInstructions = GL_TRUE; + ctx->Shader.EmitContReturn = GL_TRUE; + ctx->Shader.EmitCondCodes = GL_FALSE; + ctx->Shader.EmitComments = GL_FALSE; + ctx->Shader.Flags = get_shader_flags(); + + /* Default pragma settings */ + ctx->Shader.DefaultPragmas.IgnoreOptimize = GL_FALSE; + ctx->Shader.DefaultPragmas.IgnoreDebug = GL_FALSE; + ctx->Shader.DefaultPragmas.Optimize = GL_TRUE; + ctx->Shader.DefaultPragmas.Debug = GL_FALSE; +} + + +/** + * Free the per-context shader-related state. + */ +void +_mesa_free_shader_state(GLcontext *ctx) +{ + _mesa_reference_shader_program(ctx, &ctx->Shader.CurrentProgram, NULL); +} + + +/** + * Return the size of the given GLSL datatype, in floats (components). + */ +GLint +_mesa_sizeof_glsl_type(GLenum type) +{ + switch (type) { + case GL_FLOAT: + case GL_INT: + case GL_BOOL: + case GL_SAMPLER_1D: + case GL_SAMPLER_2D: + case GL_SAMPLER_3D: + case GL_SAMPLER_CUBE: + case GL_SAMPLER_1D_SHADOW: + case GL_SAMPLER_2D_SHADOW: + case GL_SAMPLER_2D_RECT_ARB: + case GL_SAMPLER_2D_RECT_SHADOW_ARB: + case GL_SAMPLER_1D_ARRAY_EXT: + case GL_SAMPLER_2D_ARRAY_EXT: + case GL_SAMPLER_1D_ARRAY_SHADOW_EXT: + case GL_SAMPLER_2D_ARRAY_SHADOW_EXT: + case GL_SAMPLER_CUBE_SHADOW_EXT: + return 1; + case GL_FLOAT_VEC2: + case GL_INT_VEC2: + case GL_UNSIGNED_INT_VEC2: + case GL_BOOL_VEC2: + return 2; + case GL_FLOAT_VEC3: + case GL_INT_VEC3: + case GL_UNSIGNED_INT_VEC3: + case GL_BOOL_VEC3: + return 3; + case GL_FLOAT_VEC4: + case GL_INT_VEC4: + case GL_UNSIGNED_INT_VEC4: + case GL_BOOL_VEC4: + return 4; + case GL_FLOAT_MAT2: + case GL_FLOAT_MAT2x3: + case GL_FLOAT_MAT2x4: + return 8; /* two float[4] vectors */ + case GL_FLOAT_MAT3: + case GL_FLOAT_MAT3x2: + case GL_FLOAT_MAT3x4: + return 12; /* three float[4] vectors */ + case GL_FLOAT_MAT4: + case GL_FLOAT_MAT4x2: + case GL_FLOAT_MAT4x3: + return 16; /* four float[4] vectors */ + default: + _mesa_problem(NULL, "Invalid type in _mesa_sizeof_glsl_type()"); + return 1; + } +} + + +/** + * Copy string from <src> to <dst>, up to maxLength characters, returning + * length of <dst> in <length>. + * \param src the strings source + * \param maxLength max chars to copy + * \param length returns number of chars copied + * \param dst the string destination + */ +void +_mesa_copy_string(GLchar *dst, GLsizei maxLength, + GLsizei *length, const GLchar *src) +{ + GLsizei len; + for (len = 0; len < maxLength - 1 && src && src[len]; len++) + dst[len] = src[len]; + if (maxLength > 0) + dst[len] = 0; + if (length) + *length = len; +} + + + +/** + * Find the length of the longest transform feedback varying name + * which was specified with glTransformFeedbackVaryings(). + */ +static GLint +longest_feedback_varying_name(const struct gl_shader_program *shProg) +{ + GLuint i; + GLint max = 0; + for (i = 0; i < shProg->TransformFeedback.NumVarying; i++) { + GLint len = strlen(shProg->TransformFeedback.VaryingNames[i]); + if (len > max) + max = len; + } + return max; +} + + + +static GLboolean +is_program(GLcontext *ctx, GLuint name) +{ + struct gl_shader_program *shProg = _mesa_lookup_shader_program(ctx, name); + return shProg ? GL_TRUE : GL_FALSE; +} + + +static GLboolean +is_shader(GLcontext *ctx, GLuint name) +{ + struct gl_shader *shader = _mesa_lookup_shader(ctx, name); + return shader ? GL_TRUE : GL_FALSE; +} + + +/** + * Attach shader to a shader program. + */ +static void +attach_shader(GLcontext *ctx, GLuint program, GLuint shader) +{ + struct gl_shader_program *shProg; + struct gl_shader *sh; + GLuint i, n; + + shProg = _mesa_lookup_shader_program_err(ctx, program, "glAttachShader"); + if (!shProg) + return; + + sh = _mesa_lookup_shader_err(ctx, shader, "glAttachShader"); + if (!sh) { + return; + } + + n = shProg->NumShaders; + for (i = 0; i < n; i++) { + if (shProg->Shaders[i] == sh) { + /* The shader is already attched to this program. The + * GL_ARB_shader_objects spec says: + * + * "The error INVALID_OPERATION is generated by AttachObjectARB + * if <obj> is already attached to <containerObj>." + */ + _mesa_error(ctx, GL_INVALID_OPERATION, "glAttachShader"); + return; + } + } + + /* grow list */ + shProg->Shaders = (struct gl_shader **) + _mesa_realloc(shProg->Shaders, + n * sizeof(struct gl_shader *), + (n + 1) * sizeof(struct gl_shader *)); + if (!shProg->Shaders) { + _mesa_error(ctx, GL_OUT_OF_MEMORY, "glAttachShader"); + return; + } + + /* append */ + shProg->Shaders[n] = NULL; /* since realloc() didn't zero the new space */ + _mesa_reference_shader(ctx, &shProg->Shaders[n], sh); + shProg->NumShaders++; +} + + +static GLint +get_attrib_location(GLcontext *ctx, GLuint program, const GLchar *name) +{ + struct gl_shader_program *shProg + = _mesa_lookup_shader_program_err(ctx, program, "glGetAttribLocation"); + + if (!shProg) { + return -1; + } + + if (!shProg->LinkStatus) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glGetAttribLocation(program not linked)"); + return -1; + } + + if (!name) + return -1; + + if (shProg->VertexProgram) { + const struct gl_program_parameter_list *attribs = + shProg->VertexProgram->Base.Attributes; + if (attribs) { + GLint i = _mesa_lookup_parameter_index(attribs, -1, name); + if (i >= 0) { + return attribs->Parameters[i].StateIndexes[0]; + } + } + } + return -1; +} + + +static void +bind_attrib_location(GLcontext *ctx, GLuint program, GLuint index, + const GLchar *name) +{ + struct gl_shader_program *shProg; + const GLint size = -1; /* unknown size */ + GLint i, oldIndex; + GLenum datatype = GL_FLOAT_VEC4; + + shProg = _mesa_lookup_shader_program_err(ctx, program, + "glBindAttribLocation"); + if (!shProg) { + return; + } + + if (!name) + return; + + if (strncmp(name, "gl_", 3) == 0) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glBindAttribLocation(illegal name)"); + return; + } + + if (index >= ctx->Const.VertexProgram.MaxAttribs) { + _mesa_error(ctx, GL_INVALID_VALUE, "glBindAttribLocation(index)"); + return; + } + + if (shProg->LinkStatus) { + /* get current index/location for the attribute */ + oldIndex = get_attrib_location(ctx, program, name); + } + else { + oldIndex = -1; + } + + /* this will replace the current value if it's already in the list */ + i = _mesa_add_attribute(shProg->Attributes, name, size, datatype, index); + if (i < 0) { + _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindAttribLocation"); + return; + } + + /* + * Note that this attribute binding won't go into effect until + * glLinkProgram is called again. + */ +} + + +static GLuint +create_shader(GLcontext *ctx, GLenum type) +{ + struct gl_shader *sh; + GLuint name; + + name = _mesa_HashFindFreeKeyBlock(ctx->Shared->ShaderObjects, 1); + + switch (type) { + case GL_FRAGMENT_SHADER: + case GL_VERTEX_SHADER: + sh = ctx->Driver.NewShader(ctx, name, type); + break; + default: + _mesa_error(ctx, GL_INVALID_ENUM, "CreateShader(type)"); + return 0; + } + + _mesa_HashInsert(ctx->Shared->ShaderObjects, name, sh); + + return name; +} + + +static GLuint +create_shader_program(GLcontext *ctx) +{ + GLuint name; + struct gl_shader_program *shProg; + + name = _mesa_HashFindFreeKeyBlock(ctx->Shared->ShaderObjects, 1); + + shProg = ctx->Driver.NewShaderProgram(ctx, name); + + _mesa_HashInsert(ctx->Shared->ShaderObjects, name, shProg); + + assert(shProg->RefCount == 1); + + return name; +} + + +/** + * Named w/ "2" to indicate OpenGL 2.x vs GL_ARB_fragment_programs's + * DeleteProgramARB. + */ +static void +delete_shader_program(GLcontext *ctx, GLuint name) +{ + /* + * NOTE: deleting shaders/programs works a bit differently than + * texture objects (and buffer objects, etc). Shader/program + * handles/IDs exist in the hash table until the object is really + * deleted (refcount==0). With texture objects, the handle/ID is + * removed from the hash table in glDeleteTextures() while the tex + * object itself might linger until its refcount goes to zero. + */ + struct gl_shader_program *shProg; + + shProg = _mesa_lookup_shader_program_err(ctx, name, "glDeleteProgram"); + if (!shProg) + return; + + shProg->DeletePending = GL_TRUE; + + /* effectively, decr shProg's refcount */ + _mesa_reference_shader_program(ctx, &shProg, NULL); +} + + +static void +delete_shader(GLcontext *ctx, GLuint shader) +{ + struct gl_shader *sh; + + sh = _mesa_lookup_shader_err(ctx, shader, "glDeleteShader"); + if (!sh) + return; + + sh->DeletePending = GL_TRUE; + + /* effectively, decr sh's refcount */ + _mesa_reference_shader(ctx, &sh, NULL); +} + + +static void +detach_shader(GLcontext *ctx, GLuint program, GLuint shader) +{ + struct gl_shader_program *shProg; + GLuint n; + GLuint i, j; + + shProg = _mesa_lookup_shader_program_err(ctx, program, "glDetachShader"); + if (!shProg) + return; + + n = shProg->NumShaders; + + for (i = 0; i < n; i++) { + if (shProg->Shaders[i]->Name == shader) { + /* found it */ + struct gl_shader **newList; + + /* release */ + _mesa_reference_shader(ctx, &shProg->Shaders[i], NULL); + + /* alloc new, smaller array */ + newList = (struct gl_shader **) + malloc((n - 1) * sizeof(struct gl_shader *)); + if (!newList) { + _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDetachShader"); + return; + } + for (j = 0; j < i; j++) { + newList[j] = shProg->Shaders[j]; + } + while (++i < n) + newList[j++] = shProg->Shaders[i]; + free(shProg->Shaders); + + shProg->Shaders = newList; + shProg->NumShaders = n - 1; + +#ifdef DEBUG + /* sanity check */ + { + for (j = 0; j < shProg->NumShaders; j++) { + assert(shProg->Shaders[j]->Type == GL_VERTEX_SHADER || + shProg->Shaders[j]->Type == GL_FRAGMENT_SHADER); + assert(shProg->Shaders[j]->RefCount > 0); + } + } +#endif + + return; + } + } + + /* not found */ + { + GLenum err; + if (is_shader(ctx, shader)) + err = GL_INVALID_OPERATION; + else if (is_program(ctx, shader)) + err = GL_INVALID_OPERATION; + else + err = GL_INVALID_VALUE; + _mesa_error(ctx, err, "glDetachProgram(shader)"); + return; + } +} + + +static void +get_active_attrib(GLcontext *ctx, GLuint program, GLuint index, + GLsizei maxLength, GLsizei *length, GLint *size, + GLenum *type, GLchar *nameOut) +{ + const struct gl_program_parameter_list *attribs = NULL; + struct gl_shader_program *shProg; + + shProg = _mesa_lookup_shader_program_err(ctx, program, "glGetActiveAttrib"); + if (!shProg) + return; + + if (shProg->VertexProgram) + attribs = shProg->VertexProgram->Base.Attributes; + + if (!attribs || index >= attribs->NumParameters) { + _mesa_error(ctx, GL_INVALID_VALUE, "glGetActiveAttrib(index)"); + return; + } + + _mesa_copy_string(nameOut, maxLength, length, + attribs->Parameters[index].Name); + + if (size) + *size = attribs->Parameters[index].Size + / _mesa_sizeof_glsl_type(attribs->Parameters[index].DataType); + + if (type) + *type = attribs->Parameters[index].DataType; +} + + +/** + * Return list of shaders attached to shader program. + */ +static void +get_attached_shaders(GLcontext *ctx, GLuint program, GLsizei maxCount, + GLsizei *count, GLuint *obj) +{ + struct gl_shader_program *shProg = + _mesa_lookup_shader_program_err(ctx, program, "glGetAttachedShaders"); + if (shProg) { + GLuint i; + for (i = 0; i < (GLuint) maxCount && i < shProg->NumShaders; i++) { + obj[i] = shProg->Shaders[i]->Name; + } + if (count) + *count = i; + } +} + + +/** + * glGetHandleARB() - return ID/name of currently bound shader program. + */ +static GLuint +get_handle(GLcontext *ctx, GLenum pname) +{ + if (pname == GL_PROGRAM_OBJECT_ARB) { + if (ctx->Shader.CurrentProgram) + return ctx->Shader.CurrentProgram->Name; + else + return 0; + } + else { + _mesa_error(ctx, GL_INVALID_ENUM, "glGetHandleARB"); + return 0; + } +} + + +/** + * glGetProgramiv() - get shader program state. + * Note that this is for GLSL shader programs, not ARB vertex/fragment + * programs (see glGetProgramivARB). + */ +static void +get_programiv(GLcontext *ctx, GLuint program, GLenum pname, GLint *params) +{ + const struct gl_program_parameter_list *attribs; + struct gl_shader_program *shProg + = _mesa_lookup_shader_program(ctx, program); + + if (!shProg) { + _mesa_error(ctx, GL_INVALID_VALUE, "glGetProgramiv(program)"); + return; + } + + if (shProg->VertexProgram) + attribs = shProg->VertexProgram->Base.Attributes; + else + attribs = NULL; + + switch (pname) { + case GL_DELETE_STATUS: + *params = shProg->DeletePending; + break; + case GL_LINK_STATUS: + *params = shProg->LinkStatus; + break; + case GL_VALIDATE_STATUS: + *params = shProg->Validated; + break; + case GL_INFO_LOG_LENGTH: + *params = shProg->InfoLog ? strlen(shProg->InfoLog) + 1 : 0; + break; + case GL_ATTACHED_SHADERS: + *params = shProg->NumShaders; + break; + case GL_ACTIVE_ATTRIBUTES: + *params = attribs ? attribs->NumParameters : 0; + break; + case GL_ACTIVE_ATTRIBUTE_MAX_LENGTH: + *params = _mesa_longest_parameter_name(attribs, PROGRAM_INPUT) + 1; + break; + case GL_ACTIVE_UNIFORMS: + *params = shProg->Uniforms ? shProg->Uniforms->NumUniforms : 0; + break; + case GL_ACTIVE_UNIFORM_MAX_LENGTH: + *params = _mesa_longest_uniform_name(shProg->Uniforms); + if (*params > 0) + (*params)++; /* add one for terminating zero */ + break; + case GL_PROGRAM_BINARY_LENGTH_OES: + *params = 0; + break; +#if FEATURE_EXT_transform_feedback + case GL_TRANSFORM_FEEDBACK_VARYINGS: + *params = shProg->TransformFeedback.NumVarying; + break; + case GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH: + *params = longest_feedback_varying_name(shProg) + 1; + break; + case GL_TRANSFORM_FEEDBACK_BUFFER_MODE: + *params = shProg->TransformFeedback.BufferMode; + break; +#endif + default: + _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramiv(pname)"); + return; + } +} + + +/** + * glGetShaderiv() - get GLSL shader state + */ +static void +get_shaderiv(GLcontext *ctx, GLuint name, GLenum pname, GLint *params) +{ + struct gl_shader *shader = + _mesa_lookup_shader_err(ctx, name, "glGetShaderiv"); + + if (!shader) { + return; + } + + switch (pname) { + case GL_SHADER_TYPE: + *params = shader->Type; + break; + case GL_DELETE_STATUS: + *params = shader->DeletePending; + break; + case GL_COMPILE_STATUS: + *params = shader->CompileStatus; + break; + case GL_INFO_LOG_LENGTH: + *params = shader->InfoLog ? strlen(shader->InfoLog) + 1 : 0; + break; + case GL_SHADER_SOURCE_LENGTH: + *params = shader->Source ? strlen((char *) shader->Source) + 1 : 0; + break; + default: + _mesa_error(ctx, GL_INVALID_ENUM, "glGetShaderiv(pname)"); + return; + } +} + + +static void +get_program_info_log(GLcontext *ctx, GLuint program, GLsizei bufSize, + GLsizei *length, GLchar *infoLog) +{ + struct gl_shader_program *shProg + = _mesa_lookup_shader_program(ctx, program); + if (!shProg) { + _mesa_error(ctx, GL_INVALID_VALUE, "glGetProgramInfoLog(program)"); + return; + } + _mesa_copy_string(infoLog, bufSize, length, shProg->InfoLog); +} + + +static void +get_shader_info_log(GLcontext *ctx, GLuint shader, GLsizei bufSize, + GLsizei *length, GLchar *infoLog) +{ + struct gl_shader *sh = _mesa_lookup_shader(ctx, shader); + if (!sh) { + _mesa_error(ctx, GL_INVALID_VALUE, "glGetShaderInfoLog(shader)"); + return; + } + _mesa_copy_string(infoLog, bufSize, length, sh->InfoLog); +} + + +/** + * Return shader source code. + */ +static void +get_shader_source(GLcontext *ctx, GLuint shader, GLsizei maxLength, + GLsizei *length, GLchar *sourceOut) +{ + struct gl_shader *sh; + sh = _mesa_lookup_shader_err(ctx, shader, "glGetShaderSource"); + if (!sh) { + return; + } + _mesa_copy_string(sourceOut, maxLength, length, sh->Source); +} + + +/** + * Set/replace shader source code. + */ +static void +shader_source(GLcontext *ctx, GLuint shader, const GLchar *source) +{ + struct gl_shader *sh; + + sh = _mesa_lookup_shader_err(ctx, shader, "glShaderSource"); + if (!sh) + return; + + /* free old shader source string and install new one */ + if (sh->Source) { + free((void *) sh->Source); + } + sh->Source = source; + sh->CompileStatus = GL_FALSE; +#ifdef DEBUG + sh->SourceChecksum = _mesa_str_checksum(sh->Source); +#endif +} + + +/** + * Compile a shader. + */ +static void +compile_shader(GLcontext *ctx, GLuint shaderObj) +{ + struct gl_shader *sh; + + sh = _mesa_lookup_shader_err(ctx, shaderObj, "glCompileShader"); + if (!sh) + return; + + /* set default pragma state for shader */ + sh->Pragmas = ctx->Shader.DefaultPragmas; + + /* this call will set the sh->CompileStatus field to indicate if + * compilation was successful. + */ + (void) _slang_compile(ctx, sh); +} + + +/** + * Link a program's shaders. + */ +static void +link_program(GLcontext *ctx, GLuint program) +{ + struct gl_shader_program *shProg; + struct gl_transform_feedback_object *obj = + ctx->TransformFeedback.CurrentObject; + + shProg = _mesa_lookup_shader_program_err(ctx, program, "glLinkProgram"); + if (!shProg) + return; + + if (obj->Active && shProg == ctx->Shader.CurrentProgram) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glLinkProgram(transform feedback active"); + return; + } + + FLUSH_VERTICES(ctx, _NEW_PROGRAM); + + _slang_link(ctx, program, shProg); + + /* debug code */ + if (0) { + GLuint i; + + printf("Link %u shaders in program %u: %s\n", + shProg->NumShaders, shProg->Name, + shProg->LinkStatus ? "Success" : "Failed"); + + for (i = 0; i < shProg->NumShaders; i++) { + printf(" shader %u, type 0x%x\n", + shProg->Shaders[i]->Name, + shProg->Shaders[i]->Type); + } + } +} + + +/** + * Print basic shader info (for debug). + */ +static void +print_shader_info(const struct gl_shader_program *shProg) +{ + GLuint i; + + printf("Mesa: glUseProgram(%u)\n", shProg->Name); + for (i = 0; i < shProg->NumShaders; i++) { + const char *s; + switch (shProg->Shaders[i]->Type) { + case GL_VERTEX_SHADER: + s = "vertex"; + break; + case GL_FRAGMENT_SHADER: + s = "fragment"; + break; + case GL_GEOMETRY_SHADER: + s = "geometry"; + break; + default: + s = ""; + } + printf(" %s shader %u, checksum %u\n", s, + shProg->Shaders[i]->Name, + shProg->Shaders[i]->SourceChecksum); + } + if (shProg->VertexProgram) + printf(" vert prog %u\n", shProg->VertexProgram->Base.Id); + if (shProg->FragmentProgram) + printf(" frag prog %u\n", shProg->FragmentProgram->Base.Id); +} + + +/** + * Use the named shader program for subsequent rendering. + */ +void +_mesa_use_program(GLcontext *ctx, GLuint program) +{ + struct gl_shader_program *shProg; + struct gl_transform_feedback_object *obj = + ctx->TransformFeedback.CurrentObject; + + if (obj->Active) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glUseProgram(transform feedback active)"); + return; + } + + if (ctx->Shader.CurrentProgram && + ctx->Shader.CurrentProgram->Name == program) { + /* no-op */ + return; + } + + if (program) { + shProg = _mesa_lookup_shader_program_err(ctx, program, "glUseProgram"); + if (!shProg) { + return; + } + if (!shProg->LinkStatus) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glUseProgram(program %u not linked)", program); + return; + } + + /* debug code */ + if (ctx->Shader.Flags & GLSL_USE_PROG) { + print_shader_info(shProg); + } + } + else { + shProg = NULL; + } + + if (ctx->Shader.CurrentProgram != shProg) { + FLUSH_VERTICES(ctx, _NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS); + _mesa_reference_shader_program(ctx, &ctx->Shader.CurrentProgram, shProg); + } + + if (ctx->Driver.UseProgram) + ctx->Driver.UseProgram(ctx, shProg); +} + + +/** + * Validate a program's samplers. + * Specifically, check that there aren't two samplers of different types + * pointing to the same texture unit. + * \return GL_TRUE if valid, GL_FALSE if invalid + */ +static GLboolean +validate_samplers(GLcontext *ctx, const struct gl_program *prog, char *errMsg) +{ + static const char *targetName[] = { + "TEXTURE_2D_ARRAY", + "TEXTURE_1D_ARRAY", + "TEXTURE_CUBE", + "TEXTURE_3D", + "TEXTURE_RECT", + "TEXTURE_2D", + "TEXTURE_1D", + }; + GLint targetUsed[MAX_TEXTURE_IMAGE_UNITS]; + GLbitfield samplersUsed = prog->SamplersUsed; + GLuint i; + + assert(Elements(targetName) == NUM_TEXTURE_TARGETS); + + if (samplersUsed == 0x0) + return GL_TRUE; + + for (i = 0; i < Elements(targetUsed); i++) + targetUsed[i] = -1; + + /* walk over bits which are set in 'samplers' */ + while (samplersUsed) { + GLuint unit; + gl_texture_index target; + GLint sampler = _mesa_ffs(samplersUsed) - 1; + assert(sampler >= 0); + assert(sampler < MAX_TEXTURE_IMAGE_UNITS); + unit = prog->SamplerUnits[sampler]; + target = prog->SamplerTargets[sampler]; + if (targetUsed[unit] != -1 && targetUsed[unit] != target) { + _mesa_snprintf(errMsg, 100, + "Texture unit %d is accessed both as %s and %s", + unit, targetName[targetUsed[unit]], targetName[target]); + return GL_FALSE; + } + targetUsed[unit] = target; + samplersUsed ^= (1 << sampler); + } + + return GL_TRUE; +} + + +/** + * Do validation of the given shader program. + * \param errMsg returns error message if validation fails. + * \return GL_TRUE if valid, GL_FALSE if invalid (and set errMsg) + */ +static GLboolean +validate_shader_program(GLcontext *ctx, + const struct gl_shader_program *shProg, + char *errMsg) +{ + const struct gl_vertex_program *vp = shProg->VertexProgram; + const struct gl_fragment_program *fp = shProg->FragmentProgram; + + if (!shProg->LinkStatus) { + return GL_FALSE; + } + + /* From the GL spec, a program is invalid if any of these are true: + + any two active samplers in the current program object are of + different types, but refer to the same texture image unit, + + any active sampler in the current program object refers to a texture + image unit where fixed-function fragment processing accesses a + texture target that does not match the sampler type, or + + the sum of the number of active samplers in the program and the + number of texture image units enabled for fixed-function fragment + processing exceeds the combined limit on the total number of texture + image units allowed. + */ + + + /* + * Check: any two active samplers in the current program object are of + * different types, but refer to the same texture image unit, + */ + if (vp && !validate_samplers(ctx, &vp->Base, errMsg)) { + return GL_FALSE; + } + if (fp && !validate_samplers(ctx, &fp->Base, errMsg)) { + return GL_FALSE; + } + + return GL_TRUE; +} + + +/** + * Called via glValidateProgram() + */ +static void +validate_program(GLcontext *ctx, GLuint program) +{ + struct gl_shader_program *shProg; + char errMsg[100]; + + shProg = _mesa_lookup_shader_program_err(ctx, program, "glValidateProgram"); + if (!shProg) { + return; + } + + shProg->Validated = validate_shader_program(ctx, shProg, errMsg); + if (!shProg->Validated) { + /* update info log */ + if (shProg->InfoLog) { + free(shProg->InfoLog); + } + shProg->InfoLog = _mesa_strdup(errMsg); + } +} + + + +void GLAPIENTRY +_mesa_AttachObjectARB(GLhandleARB program, GLhandleARB shader) +{ + GET_CURRENT_CONTEXT(ctx); + attach_shader(ctx, program, shader); +} + + +void GLAPIENTRY +_mesa_AttachShader(GLuint program, GLuint shader) +{ + GET_CURRENT_CONTEXT(ctx); + attach_shader(ctx, program, shader); +} + + +void GLAPIENTRY +_mesa_BindAttribLocationARB(GLhandleARB program, GLuint index, + const GLcharARB *name) +{ + GET_CURRENT_CONTEXT(ctx); + bind_attrib_location(ctx, program, index, name); +} + + +void GLAPIENTRY +_mesa_CompileShaderARB(GLhandleARB shaderObj) +{ + GET_CURRENT_CONTEXT(ctx); + compile_shader(ctx, shaderObj); +} + + +GLuint GLAPIENTRY +_mesa_CreateShader(GLenum type) +{ + GET_CURRENT_CONTEXT(ctx); + return create_shader(ctx, type); +} + + +GLhandleARB GLAPIENTRY +_mesa_CreateShaderObjectARB(GLenum type) +{ + GET_CURRENT_CONTEXT(ctx); + return create_shader(ctx, type); +} + + +GLuint GLAPIENTRY +_mesa_CreateProgram(void) +{ + GET_CURRENT_CONTEXT(ctx); + return create_shader_program(ctx); +} + + +GLhandleARB GLAPIENTRY +_mesa_CreateProgramObjectARB(void) +{ + GET_CURRENT_CONTEXT(ctx); + return create_shader_program(ctx); +} + + +void GLAPIENTRY +_mesa_DeleteObjectARB(GLhandleARB obj) +{ + if (obj) { + GET_CURRENT_CONTEXT(ctx); + if (is_program(ctx, obj)) { + delete_shader_program(ctx, obj); + } + else if (is_shader(ctx, obj)) { + delete_shader(ctx, obj); + } + else { + /* error? */ + } + } +} + + +void GLAPIENTRY +_mesa_DeleteProgram(GLuint name) +{ + if (name) { + GET_CURRENT_CONTEXT(ctx); + delete_shader_program(ctx, name); + } +} + + +void GLAPIENTRY +_mesa_DeleteShader(GLuint name) +{ + if (name) { + GET_CURRENT_CONTEXT(ctx); + delete_shader(ctx, name); + } +} + + +void GLAPIENTRY +_mesa_DetachObjectARB(GLhandleARB program, GLhandleARB shader) +{ + GET_CURRENT_CONTEXT(ctx); + detach_shader(ctx, program, shader); +} + + +void GLAPIENTRY +_mesa_DetachShader(GLuint program, GLuint shader) +{ + GET_CURRENT_CONTEXT(ctx); + detach_shader(ctx, program, shader); +} + + +void GLAPIENTRY +_mesa_GetActiveAttribARB(GLhandleARB program, GLuint index, + GLsizei maxLength, GLsizei * length, GLint * size, + GLenum * type, GLcharARB * name) +{ + GET_CURRENT_CONTEXT(ctx); + get_active_attrib(ctx, program, index, maxLength, length, size, type, name); +} + + +void GLAPIENTRY +_mesa_GetAttachedObjectsARB(GLhandleARB container, GLsizei maxCount, + GLsizei * count, GLhandleARB * obj) +{ + GET_CURRENT_CONTEXT(ctx); + get_attached_shaders(ctx, container, maxCount, count, obj); +} + + +void GLAPIENTRY +_mesa_GetAttachedShaders(GLuint program, GLsizei maxCount, + GLsizei *count, GLuint *obj) +{ + GET_CURRENT_CONTEXT(ctx); + get_attached_shaders(ctx, program, maxCount, count, obj); +} + + +GLint GLAPIENTRY +_mesa_GetAttribLocationARB(GLhandleARB program, const GLcharARB * name) +{ + GET_CURRENT_CONTEXT(ctx); + return get_attrib_location(ctx, program, name); +} + + +void GLAPIENTRY +_mesa_GetInfoLogARB(GLhandleARB object, GLsizei maxLength, GLsizei * length, + GLcharARB * infoLog) +{ + GET_CURRENT_CONTEXT(ctx); + if (is_program(ctx, object)) { + get_program_info_log(ctx, object, maxLength, length, infoLog); + } + else if (is_shader(ctx, object)) { + get_shader_info_log(ctx, object, maxLength, length, infoLog); + } + else { + _mesa_error(ctx, GL_INVALID_OPERATION, "glGetInfoLogARB"); + } +} + + +void GLAPIENTRY +_mesa_GetObjectParameterivARB(GLhandleARB object, GLenum pname, GLint *params) +{ + GET_CURRENT_CONTEXT(ctx); + /* Implement in terms of GetProgramiv, GetShaderiv */ + if (is_program(ctx, object)) { + if (pname == GL_OBJECT_TYPE_ARB) { + *params = GL_PROGRAM_OBJECT_ARB; + } + else { + get_programiv(ctx, object, pname, params); + } + } + else if (is_shader(ctx, object)) { + if (pname == GL_OBJECT_TYPE_ARB) { + *params = GL_SHADER_OBJECT_ARB; + } + else { + get_shaderiv(ctx, object, pname, params); + } + } + else { + _mesa_error(ctx, GL_INVALID_VALUE, "glGetObjectParameterivARB"); + } +} + + +void GLAPIENTRY +_mesa_GetObjectParameterfvARB(GLhandleARB object, GLenum pname, + GLfloat *params) +{ + GLint iparams[1]; /* XXX is one element enough? */ + _mesa_GetObjectParameterivARB(object, pname, iparams); + params[0] = (GLfloat) iparams[0]; +} + + +void GLAPIENTRY +_mesa_GetProgramiv(GLuint program, GLenum pname, GLint *params) +{ + GET_CURRENT_CONTEXT(ctx); + get_programiv(ctx, program, pname, params); +} + + +void GLAPIENTRY +_mesa_GetShaderiv(GLuint shader, GLenum pname, GLint *params) +{ + GET_CURRENT_CONTEXT(ctx); + get_shaderiv(ctx, shader, pname, params); +} + + +void GLAPIENTRY +_mesa_GetProgramInfoLog(GLuint program, GLsizei bufSize, + GLsizei *length, GLchar *infoLog) +{ + GET_CURRENT_CONTEXT(ctx); + get_program_info_log(ctx, program, bufSize, length, infoLog); +} + + +void GLAPIENTRY +_mesa_GetShaderInfoLog(GLuint shader, GLsizei bufSize, + GLsizei *length, GLchar *infoLog) +{ + GET_CURRENT_CONTEXT(ctx); + get_shader_info_log(ctx, shader, bufSize, length, infoLog); +} + + +void GLAPIENTRY +_mesa_GetShaderSourceARB(GLhandleARB shader, GLsizei maxLength, + GLsizei *length, GLcharARB *sourceOut) +{ + GET_CURRENT_CONTEXT(ctx); + get_shader_source(ctx, shader, maxLength, length, sourceOut); +} + + +GLhandleARB GLAPIENTRY +_mesa_GetHandleARB(GLenum pname) +{ + GET_CURRENT_CONTEXT(ctx); + return get_handle(ctx, pname); +} + + +GLboolean GLAPIENTRY +_mesa_IsProgram(GLuint name) +{ + GET_CURRENT_CONTEXT(ctx); + return is_program(ctx, name); +} + + +GLboolean GLAPIENTRY +_mesa_IsShader(GLuint name) +{ + GET_CURRENT_CONTEXT(ctx); + return is_shader(ctx, name); +} + + +void GLAPIENTRY +_mesa_LinkProgramARB(GLhandleARB programObj) +{ + GET_CURRENT_CONTEXT(ctx); + link_program(ctx, programObj); +} + + + +/** + * Read shader source code from a file. + * Useful for debugging to override an app's shader. + */ +static GLcharARB * +read_shader(const char *fname) +{ + const int max = 50*1000; + FILE *f = fopen(fname, "r"); + GLcharARB *buffer, *shader; + int len; + + if (!f) { + return NULL; + } + + buffer = (char *) malloc(max); + len = fread(buffer, 1, max, f); + buffer[len] = 0; + + fclose(f); + + shader = _mesa_strdup(buffer); + free(buffer); + + return shader; +} + + +/** + * Called via glShaderSource() and glShaderSourceARB() API functions. + * Basically, concatenate the source code strings into one long string + * and pass it to _mesa_shader_source(). + */ +void GLAPIENTRY +_mesa_ShaderSourceARB(GLhandleARB shaderObj, GLsizei count, + const GLcharARB ** string, const GLint * length) +{ + GET_CURRENT_CONTEXT(ctx); + GLint *offsets; + GLsizei i, totalLength; + GLcharARB *source; + GLuint checksum; + + if (!shaderObj || string == NULL) { + _mesa_error(ctx, GL_INVALID_VALUE, "glShaderSourceARB"); + return; + } + + /* + * This array holds offsets of where the appropriate string ends, thus the + * last element will be set to the total length of the source code. + */ + offsets = (GLint *) malloc(count * sizeof(GLint)); + if (offsets == NULL) { + _mesa_error(ctx, GL_OUT_OF_MEMORY, "glShaderSourceARB"); + return; + } + + for (i = 0; i < count; i++) { + if (string[i] == NULL) { + free((GLvoid *) offsets); + _mesa_error(ctx, GL_INVALID_OPERATION, "glShaderSourceARB(null string)"); + return; + } + if (length == NULL || length[i] < 0) + offsets[i] = strlen(string[i]); + else + offsets[i] = length[i]; + /* accumulate string lengths */ + if (i > 0) + offsets[i] += offsets[i - 1]; + } + + /* Total length of source string is sum off all strings plus two. + * One extra byte for terminating zero, another extra byte to silence + * valgrind warnings in the parser/grammer code. + */ + totalLength = offsets[count - 1] + 2; + source = (GLcharARB *) malloc(totalLength * sizeof(GLcharARB)); + if (source == NULL) { + free((GLvoid *) offsets); + _mesa_error(ctx, GL_OUT_OF_MEMORY, "glShaderSourceARB"); + return; + } + + for (i = 0; i < count; i++) { + GLint start = (i > 0) ? offsets[i - 1] : 0; + memcpy(source + start, string[i], + (offsets[i] - start) * sizeof(GLcharARB)); + } + source[totalLength - 1] = '\0'; + source[totalLength - 2] = '\0'; + + if (SHADER_SUBST) { + /* Compute the shader's source code checksum then try to open a file + * named newshader_<CHECKSUM>. If it exists, use it in place of the + * original shader source code. For debugging. + */ + char filename[100]; + GLcharARB *newSource; + + checksum = _mesa_str_checksum(source); + + _mesa_snprintf(filename, sizeof(filename), "newshader_%d", checksum); + + newSource = read_shader(filename); + if (newSource) { + fprintf(stderr, "Mesa: Replacing shader %u chksum=%d with %s\n", + shaderObj, checksum, filename); + free(source); + source = newSource; + } + } + + shader_source(ctx, shaderObj, source); + + if (SHADER_SUBST) { + struct gl_shader *sh = _mesa_lookup_shader(ctx, shaderObj); + if (sh) + sh->SourceChecksum = checksum; /* save original checksum */ + } + + free(offsets); +} + + +void GLAPIENTRY +_mesa_UseProgramObjectARB(GLhandleARB program) +{ + GET_CURRENT_CONTEXT(ctx); + FLUSH_VERTICES(ctx, _NEW_PROGRAM); + _mesa_use_program(ctx, program); +} + + +void GLAPIENTRY +_mesa_ValidateProgramARB(GLhandleARB program) +{ + GET_CURRENT_CONTEXT(ctx); + validate_program(ctx, program); +} + +#ifdef FEATURE_ES2 + +void GLAPIENTRY +_mesa_GetShaderPrecisionFormat(GLenum shadertype, GLenum precisiontype, + GLint* range, GLint* precision) +{ + GET_CURRENT_CONTEXT(ctx); + _mesa_error(ctx, GL_INVALID_OPERATION, __FUNCTION__); +} + + +void GLAPIENTRY +_mesa_ReleaseShaderCompiler(void) +{ + GET_CURRENT_CONTEXT(ctx); + _mesa_error(ctx, GL_INVALID_OPERATION, __FUNCTION__); +} + + +void GLAPIENTRY +_mesa_ShaderBinary(GLint n, const GLuint* shaders, GLenum binaryformat, + const void* binary, GLint length) +{ + GET_CURRENT_CONTEXT(ctx); + _mesa_error(ctx, GL_INVALID_OPERATION, __FUNCTION__); +} + +#endif /* FEATURE_ES2 */ + + +/** + * Plug in shader-related functions into API dispatch table. + */ +void +_mesa_init_shader_dispatch(struct _glapi_table *exec) +{ + /* GL_ARB_vertex/fragment_shader */ + SET_DeleteObjectARB(exec, _mesa_DeleteObjectARB); + SET_GetHandleARB(exec, _mesa_GetHandleARB); + SET_DetachObjectARB(exec, _mesa_DetachObjectARB); + SET_CreateShaderObjectARB(exec, _mesa_CreateShaderObjectARB); + SET_ShaderSourceARB(exec, _mesa_ShaderSourceARB); + SET_CompileShaderARB(exec, _mesa_CompileShaderARB); + SET_CreateProgramObjectARB(exec, _mesa_CreateProgramObjectARB); + SET_AttachObjectARB(exec, _mesa_AttachObjectARB); + SET_LinkProgramARB(exec, _mesa_LinkProgramARB); + SET_UseProgramObjectARB(exec, _mesa_UseProgramObjectARB); + SET_ValidateProgramARB(exec, _mesa_ValidateProgramARB); + SET_GetObjectParameterfvARB(exec, _mesa_GetObjectParameterfvARB); + SET_GetObjectParameterivARB(exec, _mesa_GetObjectParameterivARB); + SET_GetInfoLogARB(exec, _mesa_GetInfoLogARB); + SET_GetAttachedObjectsARB(exec, _mesa_GetAttachedObjectsARB); + SET_GetShaderSourceARB(exec, _mesa_GetShaderSourceARB); + + /* OpenGL 2.0 */ + SET_AttachShader(exec, _mesa_AttachShader); + SET_CreateProgram(exec, _mesa_CreateProgram); + SET_CreateShader(exec, _mesa_CreateShader); + SET_DeleteProgram(exec, _mesa_DeleteProgram); + SET_DeleteShader(exec, _mesa_DeleteShader); + SET_DetachShader(exec, _mesa_DetachShader); + SET_GetAttachedShaders(exec, _mesa_GetAttachedShaders); + SET_GetProgramiv(exec, _mesa_GetProgramiv); + SET_GetProgramInfoLog(exec, _mesa_GetProgramInfoLog); + SET_GetShaderiv(exec, _mesa_GetShaderiv); + SET_GetShaderInfoLog(exec, _mesa_GetShaderInfoLog); + SET_IsProgram(exec, _mesa_IsProgram); + SET_IsShader(exec, _mesa_IsShader); + +#if FEATURE_ARB_vertex_shader + SET_BindAttribLocationARB(exec, _mesa_BindAttribLocationARB); + SET_GetActiveAttribARB(exec, _mesa_GetActiveAttribARB); + SET_GetAttribLocationARB(exec, _mesa_GetAttribLocationARB); +#endif +} + |