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implement SWZ and TXB. some code clean-up

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This commit is contained in:
Brian Paul
2003-09-04 23:55:33 +00:00
parent 0d08399d8d
commit d402cb97bd
1 changed files with 55 additions and 46 deletions
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99
src/mesa/swrast/s_nvfragprog.c
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@@ -92,20 +92,17 @@ fetch_texel_deriv( GLcontext *ctx, const GLfloat texcoord[4],
}
/**
* Fetch a 4-element float vector from the given source register.
* Apply swizzling and negating as needed.
* Return a pointer to the 4-element float vector specified by the given
* source register.
*/
static void
fetch_vector4( GLcontext *ctx,
static INLINE const GLfloat *
get_register_pointer( GLcontext *ctx,
const struct fp_src_register *source,
struct fp_machine *machine,
const struct fragment_program *program,
GLfloat result[4] )
const struct fp_machine *machine,
const struct fragment_program *program )
{
const GLfloat *src;
switch (source->File) {
case PROGRAM_TEMPORARY:
ASSERT(source->Index < MAX_NV_FRAGMENT_PROGRAM_TEMPS);
@@ -128,11 +125,29 @@ fetch_vector4( GLcontext *ctx,
src = program->Parameters->Parameters[source->Index].Values;
break;
case PROGRAM_STATE_VAR:
abort();
src = NULL;
break;
default:
_mesa_problem(ctx, "Invalid input register file in fetch_vector4");
return;
src = NULL;
}
return src;
}
/**
* Fetch a 4-element float vector from the given source register.
* Apply swizzling and negating as needed.
*/
static void
fetch_vector4( GLcontext *ctx,
const struct fp_src_register *source,
const struct fp_machine *machine,
const struct fragment_program *program,
GLfloat result[4] )
{
const GLfloat *src = get_register_pointer(ctx, source, machine, program);
ASSERT(src);
result[0] = src[source->Swizzle[0]];
result[1] = src[source->Swizzle[1]];
@@ -297,35 +312,8 @@ fetch_vector1( GLcontext *ctx,
const struct fragment_program *program,
GLfloat result[4] )
{
const GLfloat *src;
switch (source->File) {
case PROGRAM_TEMPORARY:
ASSERT(source->Index < MAX_NV_FRAGMENT_PROGRAM_TEMPS);
src = machine->Temporaries[source->Index];
break;
case PROGRAM_INPUT:
ASSERT(source->Index < MAX_NV_FRAGMENT_PROGRAM_INPUTS);
src = machine->Inputs[source->Index];
break;
case PROGRAM_LOCAL_PARAM:
ASSERT(source->Index < MAX_PROGRAM_LOCAL_PARAMS);
src = program->Base.LocalParams[source->Index];
break;
case PROGRAM_ENV_PARAM:
ASSERT(source->Index < MAX_NV_FRAGMENT_PROGRAM_PARAMS);
src = ctx->FragmentProgram.Parameters[source->Index];
break;
case PROGRAM_NAMED_PARAM:
ASSERT(source->Index < program->Parameters->NumParameters);
src = program->Parameters->Parameters[source->Index].Values;
break;
case PROGRAM_STATE_VAR:
abort();
default:
_mesa_problem(ctx, "Invalid input register file in fetch_vector1");
return;
}
const GLfloat *src = get_register_pointer(ctx, source, machine, program);
ASSERT(src);
result[0] = src[source->Swizzle[0]];
@@ -1104,7 +1092,24 @@ execute_program( GLcontext *ctx,
break;
case FP_OPCODE_SWZ:
{
/* XXX to do: extended swizzle */
const struct fp_src_register *source = &inst->SrcReg[0];
const GLfloat *src = get_register_pointer(ctx, source,
machine, program);
GLfloat result[4];
GLuint i;
/* do extended swizzling here */
for (i = 0; i < 3; i++) {
if (source->Swizzle[i] == SWIZZLE_ZERO)
result[i] = 0.0;
else if (source->Swizzle[i] == SWIZZLE_ONE)
result[i] = -1.0;
else
result[i] = -src[source->Swizzle[i]];
if (source->NegateBase)
result[i] = -result[i];
}
store_vector4( inst, machine, result );
}
break;
case FP_OPCODE_TEX:
@@ -1122,11 +1127,15 @@ execute_program( GLcontext *ctx,
case FP_OPCODE_TXB:
/* Texel lookup with LOD bias */
{
GLfloat texcoord[4], color[4];
GLfloat texcoord[4], color[4], bias, lambda;
fetch_vector4( ctx, &inst->SrcReg[0], machine, program, texcoord );
/* XXX: apply bias from texcoord[3]!!! */
fetch_texel( ctx, texcoord,
span->array->lambda[inst->TexSrcUnit][column],
/* texcoord[3] is the bias to add to lambda */
bias = ctx->Texture.Unit[inst->TexSrcUnit].LodBias
+ ctx->Texture.Unit[inst->TexSrcUnit]._Current->LodBias
+ texcoord[3];
lambda = span->array->lambda[inst->TexSrcUnit][column] + bias;
fetch_texel( ctx, texcoord, lambda,
inst->TexSrcUnit, color );
store_vector4( inst, machine, color );
}