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mesa: added _mesa_insert_instructions()

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Also, use new _mesa_free_instructions() in a few places.

cherry-picked from gallium-0.1
This commit is contained in:
Brian Paul
2008-05-14 12:39:41 -06:00
parent 450136d368
commit 19ad9cf774
2 changed files with 52 additions and 10 deletions
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60
src/mesa/shader/program.c
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@@ -304,16 +304,7 @@ _mesa_delete_program(GLcontext *ctx, struct gl_program *prog)
if (prog->String)
_mesa_free(prog->String);
if (prog->Instructions) {
GLuint i;
for (i = 0; i < prog->NumInstructions; i++) {
if (prog->Instructions[i].Data)
_mesa_free(prog->Instructions[i].Data);
if (prog->Instructions[i].Comment)
_mesa_free((char *) prog->Instructions[i].Comment);
}
_mesa_free(prog->Instructions);
}
_mesa_free_instructions(prog->Instructions, prog->NumInstructions);
if (prog->Parameters) {
_mesa_free_parameter_list(prog->Parameters);
@@ -485,6 +476,55 @@ _mesa_clone_program(GLcontext *ctx, const struct gl_program *prog)
}
/**
* Insert 'count' NOP instructions at 'start' in the given program.
* Adjust branch targets accordingly.
*/
GLboolean
_mesa_insert_instructions(struct gl_program *prog, GLuint start, GLuint count)
{
const GLuint origLen = prog->NumInstructions;
const GLuint newLen = origLen + count;
struct prog_instruction *newInst;
GLuint i;
/* adjust branches */
for (i = 0; i < prog->NumInstructions; i++) {
struct prog_instruction *inst = prog->Instructions + i;
if (inst->BranchTarget > 0) {
if (inst->BranchTarget >= start) {
inst->BranchTarget += count;
}
}
}
/* Alloc storage for new instructions */
newInst = _mesa_alloc_instructions(newLen);
if (!newInst) {
return GL_FALSE;
}
/* Copy 'start' instructions into new instruction buffer */
_mesa_copy_instructions(newInst, prog->Instructions, start);
/* init the new instructions */
_mesa_init_instructions(newInst + start, count);
/* Copy the remaining/tail instructions to new inst buffer */
_mesa_copy_instructions(newInst + start + count,
prog->Instructions + start,
origLen - start);
/* free old instructions */
_mesa_free_instructions(prog->Instructions, origLen);
/* install new instructions */
prog->Instructions = newInst;
prog->NumInstructions = newLen;
return GL_TRUE;
}
/**
* Mixing ARB and NV vertex/fragment programs can be tricky.