/*
* Mesa 3-D graphics library
- * Version: 7.2
+ * 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"),
+/**
+ * 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(struct gl_shader_program *shProg, struct gl_program *prog)
{
GLuint *map, i, firstVarying, newFile;
+ GLbitfield *inOutFlags;
map = (GLuint *) 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) {
- /* already in list, check size */
- if (var->Size != shProg->Varying->Parameters[j].Size) {
- /* error */
+ /* 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");
return GL_FALSE;
}
+ if (!bits_agree(var->Flags, v->Flags, PROG_PARAM_BIT_CENTROID)) {
+ char msg[100];
+ snprintf(msg, sizeof(msg),
+ "centroid modifier mismatch for '%s'", var->Name);
+ link_error(shProg, msg);
+ return GL_FALSE;
+ }
+ if (!bits_agree(var->Flags, v->Flags, PROG_PARAM_BIT_INVARIANT)) {
+ char msg[100];
+ snprintf(msg, sizeof(msg),
+ "invariant modifier mismatch for '%s'", var->Name);
+ link_error(shProg, msg);
+ return GL_FALSE;
+ }
}
else {
/* not already in linked list */
- j = _mesa_add_varying(shProg->Varying, var->Name, var->Size);
+ j = _mesa_add_varying(shProg->Varying, var->Name, var->Size,
+ var->Flags);
}
- /* map varying[i] to varying[j].
+ /* Map varying[i] to varying[j].
+ * Plus, set prog->Input/OutputFlags[] as described above.
* 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;
}
- /* 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;
- }
- else {
- assert(prog->Target == GL_FRAGMENT_PROGRAM_ARB);
- firstVarying = FRAG_ATTRIB_VAR0;
- newFile = PROGRAM_INPUT;
- }
-
/* OK, now scan the program/shader instructions looking for varying vars,
* replacing the old index with the new index.
*/
* 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 void
-link_uniform_vars(struct gl_shader_program *shProg,
+static GLboolean
+link_uniform_vars(GLcontext *ctx,
+ struct gl_shader_program *shProg,
struct gl_program *prog,
GLuint *numSamplers)
{
- GLuint samplerMap[MAX_SAMPLERS];
+ GLuint samplerMap[200]; /* max number of samplers declared, not used */
GLuint i;
for (i = 0; i < prog->Parameters->NumParameters; i++) {
* Furthermore, we'll need to fix the state-var's size/datatype info.
*/
- if ((p->Type == PROGRAM_UNIFORM && p->Used) ||
- p->Type == PROGRAM_SAMPLER) {
+ 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;
}
- if (p->Type == PROGRAM_SAMPLER) {
+ /* 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 sampNum = *numSamplers;
GLuint oldSampNum = (GLuint) prog->Parameters->ParameterValues[i][0];
- assert(oldSampNum < MAX_SAMPLERS);
- samplerMap[oldSampNum] = sampNum;
+ GLuint newSampNum = *numSamplers;
+ if (newSampNum >= ctx->Const.MaxTextureImageUnits) {
+ char s[100];
+ 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 sampler vars,
- * replacing the old index with the new index.
+ /* 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++) {
inst->Sampler, map[ inst->Sampler ]);
*/
/* here, texUnit is really samplerUnit */
- assert(inst->TexSrcUnit < MAX_SAMPLERS);
- inst->TexSrcUnit = samplerMap[inst->TexSrcUnit];
- prog->SamplerTargets[inst->TexSrcUnit] = inst->TexSrcTarget;
- prog->SamplersUsed |= (1 << inst->TexSrcUnit);
+ const GLint oldSampNum = inst->TexSrcUnit;
+ if (oldSampNum < Elements(samplerMap)) {
+ const GLuint newSampNum = samplerMap[oldSampNum];
+ inst->TexSrcUnit = newSampNum;
+ prog->SamplerTargets[newSampNum] = inst->TexSrcTarget;
+ prog->SamplersUsed |= (1 << newSampNum);
+ }
}
}
+ return GL_TRUE;
}
maxAddrReg = MAX2(maxAddrReg, inst->DstReg.Index + 1);
}
}
-
prog->NumAddressRegs = maxAddrReg;
}
}
/* link uniform vars */
- if (shProg->VertexProgram)
- link_uniform_vars(shProg, &shProg->VertexProgram->Base, &numSamplers);
- if (shProg->FragmentProgram)
- link_uniform_vars(shProg, &shProg->FragmentProgram->Base, &numSamplers);
+ 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 (MESA_VERBOSE & VERBOSE_GLSL_DUMP) {
+ printf("Varying vars:\n");
+ _mesa_print_parameter_list(shProg->Varying);
+ }
+
shProg->LinkStatus = (shProg->VertexProgram || shProg->FragmentProgram);
}
projects / mesa.git / blobdiff