| /* |
| * Mesa 3-D graphics library |
| * Version: 7.3 |
| * |
| * Copyright (C) 2008 Brian Paul All Rights Reserved. |
| * Copyright (C) 2009 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 slang_link.c |
| * GLSL linker |
| * \author Brian Paul |
| */ |
| |
| #include "main/imports.h" |
| #include "main/context.h" |
| #include "main/hash.h" |
| #include "main/macros.h" |
| #include "shader/program.h" |
| #include "shader/prog_instruction.h" |
| #include "shader/prog_parameter.h" |
| #include "shader/prog_print.h" |
| #include "shader/prog_statevars.h" |
| #include "shader/prog_uniform.h" |
| #include "shader/shader_api.h" |
| #include "slang_builtin.h" |
| #include "slang_link.h" |
| |
| |
| /** cast wrapper */ |
| static struct gl_vertex_program * |
| vertex_program(struct gl_program *prog) |
| { |
| assert(prog->Target == GL_VERTEX_PROGRAM_ARB); |
| return (struct gl_vertex_program *) prog; |
| } |
| |
| |
| /** cast wrapper */ |
| static struct gl_fragment_program * |
| fragment_program(struct gl_program *prog) |
| { |
| assert(prog->Target == GL_FRAGMENT_PROGRAM_ARB); |
| return (struct gl_fragment_program *) prog; |
| } |
| |
| |
| /** |
| * Record a linking error. |
| */ |
| static void |
| link_error(struct gl_shader_program *shProg, const char *msg) |
| { |
| if (shProg->InfoLog) { |
| _mesa_free(shProg->InfoLog); |
| } |
| shProg->InfoLog = _mesa_strdup(msg); |
| shProg->LinkStatus = GL_FALSE; |
| } |
| |
| |
| |
| /** |
| * Check if the given bit is either set or clear in both bitfields. |
| */ |
| static GLboolean |
| bits_agree(GLbitfield flags1, GLbitfield flags2, GLbitfield bit) |
| { |
| return (flags1 & bit) == (flags2 & bit); |
| } |
| |
| |
| /** |
| * Linking varying vars involves rearranging varying vars so that the |
| * vertex program's output varyings matches the order of the fragment |
| * program's input varyings. |
| * We'll then rewrite instructions to replace PROGRAM_VARYING with either |
| * PROGRAM_INPUT or PROGRAM_OUTPUT depending on whether it's a vertex or |
| * fragment shader. |
| * This is also where we set program Input/OutputFlags to indicate |
| * which inputs are centroid-sampled, invariant, etc. |
| */ |
| static GLboolean |
| link_varying_vars(GLcontext *ctx, |
| struct gl_shader_program *shProg, struct gl_program *prog) |
| { |
| GLuint *map, i, firstVarying, newFile; |
| GLbitfield *inOutFlags; |
| |
| map = (GLuint *) _mesa_malloc(prog->Varying->NumParameters * sizeof(GLuint)); |
| if (!map) |
| return GL_FALSE; |
| |
| /* Varying variables are treated like other vertex program outputs |
| * (and like other fragment program inputs). The position of the |
| * first varying differs for vertex/fragment programs... |
| * Also, replace File=PROGRAM_VARYING with File=PROGRAM_INPUT/OUTPUT. |
| */ |
| if (prog->Target == GL_VERTEX_PROGRAM_ARB) { |
| firstVarying = VERT_RESULT_VAR0; |
| newFile = PROGRAM_OUTPUT; |
| inOutFlags = prog->OutputFlags; |
| } |
| else { |
| assert(prog->Target == GL_FRAGMENT_PROGRAM_ARB); |
| firstVarying = FRAG_ATTRIB_VAR0; |
| newFile = PROGRAM_INPUT; |
| inOutFlags = prog->InputFlags; |
| } |
| |
| for (i = 0; i < prog->Varying->NumParameters; i++) { |
| /* see if this varying is in the linked varying list */ |
| const struct gl_program_parameter *var = prog->Varying->Parameters + i; |
| GLint j = _mesa_lookup_parameter_index(shProg->Varying, -1, var->Name); |
| if (j >= 0) { |
| /* varying is already in list, do some error checking */ |
| const struct gl_program_parameter *v = |
| &shProg->Varying->Parameters[j]; |
| if (var->Size != v->Size) { |
| link_error(shProg, "mismatched varying variable types"); |
| _mesa_free(map); |
| return GL_FALSE; |
| } |
| if (!bits_agree(var->Flags, v->Flags, PROG_PARAM_BIT_CENTROID)) { |
| char msg[100]; |
| _mesa_snprintf(msg, sizeof(msg), |
| "centroid modifier mismatch for '%s'", var->Name); |
| link_error(shProg, msg); |
| _mesa_free(map); |
| return GL_FALSE; |
| } |
| if (!bits_agree(var->Flags, v->Flags, PROG_PARAM_BIT_INVARIANT)) { |
| char msg[100]; |
| _mesa_snprintf(msg, sizeof(msg), |
| "invariant modifier mismatch for '%s'", var->Name); |
| link_error(shProg, msg); |
| _mesa_free(map); |
| return GL_FALSE; |
| } |
| } |
| else { |
| /* not already in linked list */ |
| j = _mesa_add_varying(shProg->Varying, var->Name, var->Size, |
| var->Flags); |
| } |
| |
| if (shProg->Varying->NumParameters > ctx->Const.MaxVarying) { |
| link_error(shProg, "Too many varying variables"); |
| _mesa_free(map); |
| return GL_FALSE; |
| } |
| |
| /* Map varying[i] to varying[j]. |
| * Note: the loop here takes care of arrays or large (sz>4) vars. |
| */ |
| { |
| GLint sz = var->Size; |
| while (sz > 0) { |
| inOutFlags[firstVarying + j] = var->Flags; |
| /*printf("Link varying from %d to %d\n", i, j);*/ |
| map[i++] = j++; |
| sz -= 4; |
| } |
| i--; /* go back one */ |
| } |
| } |
| |
| |
| /* OK, now scan the program/shader instructions looking for varying vars, |
| * replacing the old index with the new index. |
| */ |
| for (i = 0; i < prog->NumInstructions; i++) { |
| struct prog_instruction *inst = prog->Instructions + i; |
| GLuint j; |
| |
| if (inst->DstReg.File == PROGRAM_VARYING) { |
| inst->DstReg.File = newFile; |
| inst->DstReg.Index = map[ inst->DstReg.Index ] + firstVarying; |
| } |
| |
| for (j = 0; j < 3; j++) { |
| if (inst->SrcReg[j].File == PROGRAM_VARYING) { |
| inst->SrcReg[j].File = newFile; |
| inst->SrcReg[j].Index = map[ inst->SrcReg[j].Index ] + firstVarying; |
| } |
| } |
| } |
| |
| _mesa_free(map); |
| |
| /* these will get recomputed before linking is completed */ |
| prog->InputsRead = 0x0; |
| prog->OutputsWritten = 0x0; |
| |
| return GL_TRUE; |
| } |
| |
| |
| /** |
| * Build the shProg->Uniforms list. |
| * This is basically a list/index of all uniforms found in either/both of |
| * the vertex and fragment shaders. |
| * |
| * About uniforms: |
| * Each uniform has two indexes, one that points into the vertex |
| * program's parameter array and another that points into the fragment |
| * program's parameter array. When the user changes a uniform's value |
| * we have to change the value in the vertex and/or fragment program's |
| * parameter array. |
| * |
| * This function will be called twice to set up the two uniform->parameter |
| * mappings. |
| * |
| * If a uniform is only present in the vertex program OR fragment program |
| * then the fragment/vertex parameter index, respectively, will be -1. |
| */ |
| static GLboolean |
| link_uniform_vars(GLcontext *ctx, |
| struct gl_shader_program *shProg, |
| struct gl_program *prog, |
| GLuint *numSamplers) |
| { |
| GLuint samplerMap[200]; /* max number of samplers declared, not used */ |
| GLuint i; |
| |
| for (i = 0; i < prog->Parameters->NumParameters; i++) { |
| const struct gl_program_parameter *p = prog->Parameters->Parameters + i; |
| |
| /* |
| * XXX FIX NEEDED HERE |
| * We should also be adding a uniform if p->Type == PROGRAM_STATE_VAR. |
| * For example, modelview matrix, light pos, etc. |
| * Also, we need to update the state-var name-generator code to |
| * generate GLSL-style names, like "gl_LightSource[0].position". |
| * Furthermore, we'll need to fix the state-var's size/datatype info. |
| */ |
| |
| if ((p->Type == PROGRAM_UNIFORM || p->Type == PROGRAM_SAMPLER) |
| && p->Used) { |
| /* add this uniform, indexing into the target's Parameters list */ |
| struct gl_uniform *uniform = |
| _mesa_append_uniform(shProg->Uniforms, p->Name, prog->Target, i); |
| if (uniform) |
| uniform->Initialized = p->Initialized; |
| } |
| |
| /* The samplerMap[] table we build here is used to remap/re-index |
| * sampler references by TEX instructions. |
| */ |
| if (p->Type == PROGRAM_SAMPLER && p->Used) { |
| /* Allocate a new sampler index */ |
| GLuint oldSampNum = (GLuint) prog->Parameters->ParameterValues[i][0]; |
| GLuint newSampNum = *numSamplers; |
| if (newSampNum >= ctx->Const.MaxTextureImageUnits) { |
| char s[100]; |
| _mesa_sprintf(s, "Too many texture samplers (%u, max is %u)", |
| newSampNum, ctx->Const.MaxTextureImageUnits); |
| link_error(shProg, s); |
| return GL_FALSE; |
| } |
| /* save old->new mapping in the table */ |
| if (oldSampNum < Elements(samplerMap)) |
| samplerMap[oldSampNum] = newSampNum; |
| /* update parameter's sampler index */ |
| prog->Parameters->ParameterValues[i][0] = (GLfloat) newSampNum; |
| (*numSamplers)++; |
| } |
| } |
| |
| /* OK, now scan the program/shader instructions looking for texture |
| * instructions using sampler vars. Replace old sampler indexes with |
| * new ones. |
| */ |
| prog->SamplersUsed = 0x0; |
| for (i = 0; i < prog->NumInstructions; i++) { |
| struct prog_instruction *inst = prog->Instructions + i; |
| if (_mesa_is_tex_instruction(inst->Opcode)) { |
| /* here, inst->TexSrcUnit is really the sampler unit */ |
| const GLint oldSampNum = inst->TexSrcUnit; |
| |
| #if 0 |
| printf("====== remap sampler from %d to %d\n", |
| inst->TexSrcUnit, samplerMap[ inst->TexSrcUnit ]); |
| #endif |
| |
| if (oldSampNum < Elements(samplerMap)) { |
| const GLuint newSampNum = samplerMap[oldSampNum]; |
| inst->TexSrcUnit = newSampNum; |
| prog->SamplerTargets[newSampNum] = inst->TexSrcTarget; |
| prog->SamplersUsed |= (1 << newSampNum); |
| if (inst->TexShadow) { |
| prog->ShadowSamplers |= (1 << newSampNum); |
| } |
| } |
| } |
| } |
| |
| return GL_TRUE; |
| } |
| |
| |
| /** |
| * Resolve binding of generic vertex attributes. |
| * For example, if the vertex shader declared "attribute vec4 foobar" we'll |
| * allocate a generic vertex attribute for "foobar" and plug that value into |
| * the vertex program instructions. |
| * But if the user called glBindAttributeLocation(), those bindings will |
| * have priority. |
| */ |
| static GLboolean |
| _slang_resolve_attributes(struct gl_shader_program *shProg, |
| const struct gl_program *origProg, |
| struct gl_program *linkedProg) |
| { |
| GLint attribMap[MAX_VERTEX_GENERIC_ATTRIBS]; |
| GLuint i, j; |
| GLbitfield usedAttributes; /* generics only, not legacy attributes */ |
| GLbitfield inputsRead = 0x0; |
| |
| assert(origProg != linkedProg); |
| assert(origProg->Target == GL_VERTEX_PROGRAM_ARB); |
| assert(linkedProg->Target == GL_VERTEX_PROGRAM_ARB); |
| |
| if (!shProg->Attributes) |
| shProg->Attributes = _mesa_new_parameter_list(); |
| |
| if (linkedProg->Attributes) { |
| _mesa_free_parameter_list(linkedProg->Attributes); |
| } |
| linkedProg->Attributes = _mesa_new_parameter_list(); |
| |
| |
| /* Build a bitmask indicating which attribute indexes have been |
| * explicitly bound by the user with glBindAttributeLocation(). |
| */ |
| usedAttributes = 0x0; |
| for (i = 0; i < shProg->Attributes->NumParameters; i++) { |
| GLint attr = shProg->Attributes->Parameters[i].StateIndexes[0]; |
| usedAttributes |= (1 << attr); |
| } |
| |
| /* If gl_Vertex is used, that actually counts against the limit |
| * on generic vertex attributes. This avoids the ambiguity of |
| * whether glVertexAttrib4fv(0, v) sets legacy attribute 0 (vert pos) |
| * or generic attribute[0]. If gl_Vertex is used, we want the former. |
| */ |
| if (origProg->InputsRead & VERT_BIT_POS) { |
| usedAttributes |= 0x1; |
| } |
| |
| /* initialize the generic attribute map entries to -1 */ |
| for (i = 0; i < MAX_VERTEX_GENERIC_ATTRIBS; i++) { |
| attribMap[i] = -1; |
| } |
| |
| /* |
| * Scan program for generic attribute references |
| */ |
| for (i = 0; i < linkedProg->NumInstructions; i++) { |
| struct prog_instruction *inst = linkedProg->Instructions + i; |
| for (j = 0; j < 3; j++) { |
| if (inst->SrcReg[j].File == PROGRAM_INPUT) { |
| inputsRead |= (1 << inst->SrcReg[j].Index); |
| } |
| |
| if (inst->SrcReg[j].File == PROGRAM_INPUT && |
| inst->SrcReg[j].Index >= VERT_ATTRIB_GENERIC0) { |
| /* |
| * OK, we've found a generic vertex attribute reference. |
| */ |
| const GLint k = inst->SrcReg[j].Index - VERT_ATTRIB_GENERIC0; |
| |
| GLint attr = attribMap[k]; |
| |
| if (attr < 0) { |
| /* Need to figure out attribute mapping now. |
| */ |
| const char *name = origProg->Attributes->Parameters[k].Name; |
| const GLint size = origProg->Attributes->Parameters[k].Size; |
| const GLenum type =origProg->Attributes->Parameters[k].DataType; |
| GLint index; |
| |
| /* See if there's a user-defined attribute binding for |
| * this name. |
| */ |
| index = _mesa_lookup_parameter_index(shProg->Attributes, |
| -1, name); |
| if (index >= 0) { |
| /* Found a user-defined binding */ |
| attr = shProg->Attributes->Parameters[index].StateIndexes[0]; |
| } |
| else { |
| /* No user-defined binding, choose our own attribute number. |
| * Start at 1 since generic attribute 0 always aliases |
| * glVertex/position. |
| */ |
| for (attr = 0; attr < MAX_VERTEX_GENERIC_ATTRIBS; attr++) { |
| if (((1 << attr) & usedAttributes) == 0) |
| break; |
| } |
| if (attr == MAX_VERTEX_GENERIC_ATTRIBS) { |
| link_error(shProg, "Too many vertex attributes"); |
| return GL_FALSE; |
| } |
| |
| /* mark this attribute as used */ |
| usedAttributes |= (1 << attr); |
| } |
| |
| attribMap[k] = attr; |
| |
| /* Save the final name->attrib binding so it can be queried |
| * with glGetAttributeLocation(). |
| */ |
| _mesa_add_attribute(linkedProg->Attributes, name, |
| size, type, attr); |
| } |
| |
| assert(attr >= 0); |
| |
| /* update the instruction's src reg */ |
| inst->SrcReg[j].Index = VERT_ATTRIB_GENERIC0 + attr; |
| } |
| } |
| } |
| |
| /* Handle pre-defined attributes here (gl_Vertex, gl_Normal, etc). |
| * When the user queries the active attributes we need to include both |
| * the user-defined attributes and the built-in ones. |
| */ |
| for (i = VERT_ATTRIB_POS; i < VERT_ATTRIB_GENERIC0; i++) { |
| if (inputsRead & (1 << i)) { |
| _mesa_add_attribute(linkedProg->Attributes, |
| _slang_vert_attrib_name(i), |
| 4, /* size in floats */ |
| _slang_vert_attrib_type(i), |
| -1 /* attrib/input */); |
| } |
| } |
| |
| return GL_TRUE; |
| } |
| |
| |
| /** |
| * Scan program instructions to update the program's NumTemporaries field. |
| * Note: this implemenation relies on the code generator allocating |
| * temps in increasing order (0, 1, 2, ... ). |
| */ |
| static void |
| _slang_count_temporaries(struct gl_program *prog) |
| { |
| GLuint i, j; |
| GLint maxIndex = -1; |
| |
| for (i = 0; i < prog->NumInstructions; i++) { |
| const struct prog_instruction *inst = prog->Instructions + i; |
| const GLuint numSrc = _mesa_num_inst_src_regs(inst->Opcode); |
| for (j = 0; j < numSrc; j++) { |
| if (inst->SrcReg[j].File == PROGRAM_TEMPORARY) { |
| if (maxIndex < inst->SrcReg[j].Index) |
| maxIndex = inst->SrcReg[j].Index; |
| } |
| if (inst->DstReg.File == PROGRAM_TEMPORARY) { |
| if (maxIndex < (GLint) inst->DstReg.Index) |
| maxIndex = inst->DstReg.Index; |
| } |
| } |
| } |
| |
| prog->NumTemporaries = (GLuint) (maxIndex + 1); |
| } |
| |
| |
| /** |
| * Scan program instructions to update the program's InputsRead and |
| * OutputsWritten fields. |
| */ |
| static void |
| _slang_update_inputs_outputs(struct gl_program *prog) |
| { |
| GLuint i, j; |
| GLuint maxAddrReg = 0; |
| |
| prog->InputsRead = 0x0; |
| prog->OutputsWritten = 0x0; |
| |
| for (i = 0; i < prog->NumInstructions; i++) { |
| const struct prog_instruction *inst = prog->Instructions + i; |
| const GLuint numSrc = _mesa_num_inst_src_regs(inst->Opcode); |
| for (j = 0; j < numSrc; j++) { |
| if (inst->SrcReg[j].File == PROGRAM_INPUT) { |
| prog->InputsRead |= 1 << inst->SrcReg[j].Index; |
| } |
| else if (inst->SrcReg[j].File == PROGRAM_ADDRESS) { |
| maxAddrReg = MAX2(maxAddrReg, (GLuint) (inst->SrcReg[j].Index + 1)); |
| } |
| } |
| |
| if (inst->DstReg.File == PROGRAM_OUTPUT) { |
| prog->OutputsWritten |= 1 << inst->DstReg.Index; |
| if (inst->DstReg.RelAddr) { |
| /* If the output attribute is indexed with relative addressing |
| * we know that it must be a varying or texcoord such as |
| * gl_TexCoord[i] = v; In this case, mark all the texcoords |
| * or varying outputs as being written. It's not an error if |
| * a vertex shader writes varying vars that aren't used by the |
| * fragment shader. But it is an error for a fragment shader |
| * to use varyings that are not written by the vertex shader. |
| */ |
| if (prog->Target == GL_VERTEX_PROGRAM_ARB) { |
| if (inst->DstReg.Index == VERT_RESULT_TEX0) { |
| /* mark all texcoord outputs as written */ |
| const GLbitfield mask = |
| ((1 << MAX_TEXTURE_COORD_UNITS) - 1) << VERT_RESULT_TEX0; |
| prog->OutputsWritten |= mask; |
| } |
| else if (inst->DstReg.Index == VERT_RESULT_VAR0) { |
| /* mark all generic varying outputs as written */ |
| const GLbitfield mask = |
| ((1 << MAX_VARYING) - 1) << VERT_RESULT_VAR0; |
| prog->OutputsWritten |= mask; |
| } |
| } |
| } |
| } |
| else if (inst->DstReg.File == PROGRAM_ADDRESS) { |
| maxAddrReg = MAX2(maxAddrReg, inst->DstReg.Index + 1); |
| } |
| } |
| prog->NumAddressRegs = maxAddrReg; |
| } |
| |
| |
| |
| /** |
| * Remove extra #version directives from the concatenated source string. |
| * Disable the extra ones by converting first two chars to //, a comment. |
| * This is a bit of hack to work around a preprocessor bug that only |
| * allows one #version directive per source. |
| */ |
| static void |
| remove_extra_version_directives(GLchar *source) |
| { |
| GLuint verCount = 0; |
| while (1) { |
| char *ver = _mesa_strstr(source, "#version"); |
| if (ver) { |
| verCount++; |
| if (verCount > 1) { |
| ver[0] = '/'; |
| ver[1] = '/'; |
| } |
| source += 8; |
| } |
| else { |
| break; |
| } |
| } |
| } |
| |
| |
| |
| /** |
| * Return a new shader whose source code is the concatenation of |
| * all the shader sources of the given type. |
| */ |
| static struct gl_shader * |
| concat_shaders(struct gl_shader_program *shProg, GLenum shaderType) |
| { |
| struct gl_shader *newShader; |
| const struct gl_shader *firstShader = NULL; |
| GLuint shaderLengths[100]; |
| GLchar *source; |
| GLuint totalLen = 0, len = 0; |
| GLuint i; |
| |
| /* compute total size of new shader source code */ |
| for (i = 0; i < shProg->NumShaders; i++) { |
| const struct gl_shader *shader = shProg->Shaders[i]; |
| if (shader->Type == shaderType) { |
| shaderLengths[i] = _mesa_strlen(shader->Source); |
| totalLen += shaderLengths[i]; |
| if (!firstShader) |
| firstShader = shader; |
| } |
| } |
| |
| if (totalLen == 0) |
| return NULL; |
| |
| source = (GLchar *) _mesa_malloc(totalLen + 1); |
| if (!source) |
| return NULL; |
| |
| /* concatenate shaders */ |
| for (i = 0; i < shProg->NumShaders; i++) { |
| const struct gl_shader *shader = shProg->Shaders[i]; |
| if (shader->Type == shaderType) { |
| _mesa_memcpy(source + len, shader->Source, shaderLengths[i]); |
| len += shaderLengths[i]; |
| } |
| } |
| source[len] = '\0'; |
| /* |
| _mesa_printf("---NEW CONCATENATED SHADER---:\n%s\n------------\n", source); |
| */ |
| |
| remove_extra_version_directives(source); |
| |
| newShader = CALLOC_STRUCT(gl_shader); |
| newShader->Type = shaderType; |
| newShader->Source = source; |
| newShader->Pragmas = firstShader->Pragmas; |
| |
| return newShader; |
| } |
| |
| |
| /** |
| * Search the shader program's list of shaders to find the one that |
| * defines main(). |
| * This will involve shader concatenation and recompilation if needed. |
| */ |
| static struct gl_shader * |
| get_main_shader(GLcontext *ctx, |
| struct gl_shader_program *shProg, GLenum type) |
| { |
| struct gl_shader *shader = NULL; |
| GLuint i; |
| |
| /* |
| * Look for a shader that defines main() and has no unresolved references. |
| */ |
| for (i = 0; i < shProg->NumShaders; i++) { |
| shader = shProg->Shaders[i]; |
| if (shader->Type == type && |
| shader->Main && |
| !shader->UnresolvedRefs) { |
| /* All set! */ |
| return shader; |
| } |
| } |
| |
| /* |
| * There must have been unresolved references during the original |
| * compilation. Try concatenating all the shaders of the given type |
| * and recompile that. |
| */ |
| shader = concat_shaders(shProg, type); |
| |
| if (shader) { |
| _slang_compile(ctx, shader); |
| |
| /* Finally, check if recompiling failed */ |
| if (!shader->CompileStatus || |
| !shader->Main || |
| shader->UnresolvedRefs) { |
| link_error(shProg, "Unresolved symbols"); |
| _mesa_free_shader(ctx, shader); |
| return NULL; |
| } |
| } |
| |
| return shader; |
| } |
| |
| |
| /** |
| * Shader linker. Currently: |
| * |
| * 1. The last attached vertex shader and fragment shader are linked. |
| * 2. Varying vars in the two shaders are combined so their locations |
| * agree between the vertex and fragment stages. They're treated as |
| * vertex program output attribs and as fragment program input attribs. |
| * 3. The vertex and fragment programs are cloned and modified to update |
| * src/dst register references so they use the new, linked varying |
| * storage locations. |
| */ |
| void |
| _slang_link(GLcontext *ctx, |
| GLhandleARB programObj, |
| struct gl_shader_program *shProg) |
| { |
| const struct gl_vertex_program *vertProg = NULL; |
| const struct gl_fragment_program *fragProg = NULL; |
| GLuint numSamplers = 0; |
| GLuint i; |
| |
| _mesa_clear_shader_program_data(ctx, shProg); |
| |
| /* Initialize LinkStatus to "success". Will be cleared if error. */ |
| shProg->LinkStatus = GL_TRUE; |
| |
| /* check that all programs compiled successfully */ |
| for (i = 0; i < shProg->NumShaders; i++) { |
| if (!shProg->Shaders[i]->CompileStatus) { |
| link_error(shProg, "linking with uncompiled shader\n"); |
| return; |
| } |
| } |
| |
| shProg->Uniforms = _mesa_new_uniform_list(); |
| shProg->Varying = _mesa_new_parameter_list(); |
| |
| /* |
| * Find the vertex and fragment shaders which define main() |
| */ |
| { |
| struct gl_shader *vertShader, *fragShader; |
| vertShader = get_main_shader(ctx, shProg, GL_VERTEX_SHADER); |
| fragShader = get_main_shader(ctx, shProg, GL_FRAGMENT_SHADER); |
| if (vertShader) |
| vertProg = vertex_program(vertShader->Program); |
| if (fragShader) |
| fragProg = fragment_program(fragShader->Program); |
| if (!shProg->LinkStatus) |
| return; |
| } |
| |
| #if FEATURE_es2_glsl |
| /* must have both a vertex and fragment program for ES2 */ |
| if (!vertProg) { |
| link_error(shProg, "missing vertex shader\n"); |
| return; |
| } |
| if (!fragProg) { |
| link_error(shProg, "missing fragment shader\n"); |
| return; |
| } |
| #endif |
| |
| /* |
| * Make copies of the vertex/fragment programs now since we'll be |
| * changing src/dst registers after merging the uniforms and varying vars. |
| */ |
| _mesa_reference_vertprog(ctx, &shProg->VertexProgram, NULL); |
| if (vertProg) { |
| struct gl_vertex_program *linked_vprog = |
| vertex_program(_mesa_clone_program(ctx, &vertProg->Base)); |
| shProg->VertexProgram = linked_vprog; /* refcount OK */ |
| /* vertex program ID not significant; just set Id for debugging purposes */ |
| shProg->VertexProgram->Base.Id = shProg->Name; |
| ASSERT(shProg->VertexProgram->Base.RefCount == 1); |
| } |
| |
| _mesa_reference_fragprog(ctx, &shProg->FragmentProgram, NULL); |
| if (fragProg) { |
| struct gl_fragment_program *linked_fprog = |
| fragment_program(_mesa_clone_program(ctx, &fragProg->Base)); |
| shProg->FragmentProgram = linked_fprog; /* refcount OK */ |
| /* vertex program ID not significant; just set Id for debugging purposes */ |
| shProg->FragmentProgram->Base.Id = shProg->Name; |
| ASSERT(shProg->FragmentProgram->Base.RefCount == 1); |
| } |
| |
| /* link varying vars */ |
| if (shProg->VertexProgram) { |
| if (!link_varying_vars(ctx, shProg, &shProg->VertexProgram->Base)) |
| return; |
| } |
| if (shProg->FragmentProgram) { |
| if (!link_varying_vars(ctx, shProg, &shProg->FragmentProgram->Base)) |
| return; |
| } |
| |
| /* link uniform vars */ |
| if (shProg->VertexProgram) { |
| if (!link_uniform_vars(ctx, shProg, &shProg->VertexProgram->Base, |
| &numSamplers)) { |
| return; |
| } |
| } |
| if (shProg->FragmentProgram) { |
| if (!link_uniform_vars(ctx, shProg, &shProg->FragmentProgram->Base, |
| &numSamplers)) { |
| return; |
| } |
| } |
| |
| /*_mesa_print_uniforms(shProg->Uniforms);*/ |
| |
| if (shProg->VertexProgram) { |
| if (!_slang_resolve_attributes(shProg, &vertProg->Base, |
| &shProg->VertexProgram->Base)) { |
| return; |
| } |
| } |
| |
| if (shProg->VertexProgram) { |
| _slang_update_inputs_outputs(&shProg->VertexProgram->Base); |
| _slang_count_temporaries(&shProg->VertexProgram->Base); |
| if (!(shProg->VertexProgram->Base.OutputsWritten & (1 << VERT_RESULT_HPOS))) { |
| /* the vertex program did not compute a vertex position */ |
| link_error(shProg, |
| "gl_Position was not written by vertex shader\n"); |
| return; |
| } |
| } |
| if (shProg->FragmentProgram) { |
| _slang_count_temporaries(&shProg->FragmentProgram->Base); |
| _slang_update_inputs_outputs(&shProg->FragmentProgram->Base); |
| } |
| |
| /* Check that all the varying vars needed by the fragment shader are |
| * actually produced by the vertex shader. |
| */ |
| if (shProg->FragmentProgram) { |
| const GLbitfield varyingRead |
| = shProg->FragmentProgram->Base.InputsRead >> FRAG_ATTRIB_VAR0; |
| const GLbitfield varyingWritten = shProg->VertexProgram ? |
| shProg->VertexProgram->Base.OutputsWritten >> VERT_RESULT_VAR0 : 0x0; |
| if ((varyingRead & varyingWritten) != varyingRead) { |
| link_error(shProg, |
| "Fragment program using varying vars not written by vertex shader\n"); |
| return; |
| } |
| } |
| |
| /* check that gl_FragColor and gl_FragData are not both written to */ |
| if (shProg->FragmentProgram) { |
| GLbitfield outputsWritten = shProg->FragmentProgram->Base.OutputsWritten; |
| if ((outputsWritten & ((1 << FRAG_RESULT_COLOR))) && |
| (outputsWritten >= (1 << FRAG_RESULT_DATA0))) { |
| link_error(shProg, "Fragment program cannot write both gl_FragColor" |
| " and gl_FragData[].\n"); |
| return; |
| } |
| } |
| |
| |
| if (fragProg && shProg->FragmentProgram) { |
| /* Compute initial program's TexturesUsed info */ |
| _mesa_update_shader_textures_used(&shProg->FragmentProgram->Base); |
| |
| /* notify driver that a new fragment program has been compiled/linked */ |
| ctx->Driver.ProgramStringNotify(ctx, GL_FRAGMENT_PROGRAM_ARB, |
| &shProg->FragmentProgram->Base); |
| if (ctx->Shader.Flags & GLSL_DUMP) { |
| _mesa_printf("Mesa pre-link fragment program:\n"); |
| _mesa_print_program(&fragProg->Base); |
| _mesa_print_program_parameters(ctx, &fragProg->Base); |
| |
| _mesa_printf("Mesa post-link fragment program:\n"); |
| _mesa_print_program(&shProg->FragmentProgram->Base); |
| _mesa_print_program_parameters(ctx, &shProg->FragmentProgram->Base); |
| } |
| } |
| |
| if (vertProg && shProg->VertexProgram) { |
| /* Compute initial program's TexturesUsed info */ |
| _mesa_update_shader_textures_used(&shProg->VertexProgram->Base); |
| |
| /* notify driver that a new vertex program has been compiled/linked */ |
| ctx->Driver.ProgramStringNotify(ctx, GL_VERTEX_PROGRAM_ARB, |
| &shProg->VertexProgram->Base); |
| if (ctx->Shader.Flags & GLSL_DUMP) { |
| _mesa_printf("Mesa pre-link vertex program:\n"); |
| _mesa_print_program(&vertProg->Base); |
| _mesa_print_program_parameters(ctx, &vertProg->Base); |
| |
| _mesa_printf("Mesa post-link vertex program:\n"); |
| _mesa_print_program(&shProg->VertexProgram->Base); |
| _mesa_print_program_parameters(ctx, &shProg->VertexProgram->Base); |
| } |
| } |
| |
| /* Debug: */ |
| if (0) { |
| if (shProg->VertexProgram) |
| _mesa_postprocess_program(ctx, &shProg->VertexProgram->Base); |
| if (shProg->FragmentProgram) |
| _mesa_postprocess_program(ctx, &shProg->FragmentProgram->Base); |
| } |
| |
| if (ctx->Shader.Flags & GLSL_DUMP) { |
| _mesa_printf("Varying vars:\n"); |
| _mesa_print_parameter_list(shProg->Varying); |
| if (shProg->InfoLog) { |
| _mesa_printf("Info Log: %s\n", shProg->InfoLog); |
| } |
| } |
| |
| shProg->LinkStatus = (shProg->VertexProgram || shProg->FragmentProgram); |
| } |
| |