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authorBrian Paul <brian.paul@tungstengraphics.com>2003-09-04 23:55:33 +0000
committerBrian Paul <brian.paul@tungstengraphics.com>2003-09-04 23:55:33 +0000
commitd402cb97bd241d8bb762ace76967eb084f2021a6 (patch)
treedc73382b56e93dcd959810957aee9bfc9252b8b0 /src/mesa/swrast/s_nvfragprog.c
parent0d08399d8df6d7c52b1d85b0b54ec8d4c4fa6a28 (diff)
implement SWZ and TXB. some code clean-up
Diffstat (limited to 'src/mesa/swrast/s_nvfragprog.c')
-rw-r--r--src/mesa/swrast/s_nvfragprog.c101
1 files changed, 55 insertions, 46 deletions
diff --git a/src/mesa/swrast/s_nvfragprog.c b/src/mesa/swrast/s_nvfragprog.c
index c230ff38de..9e5bcafd71 100644
--- a/src/mesa/swrast/s_nvfragprog.c
+++ b/src/mesa/swrast/s_nvfragprog.c
@@ -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,
- const struct fp_src_register *source,
- struct fp_machine *machine,
- const struct fragment_program *program,
- GLfloat result[4] )
+static INLINE const GLfloat *
+get_register_pointer( GLcontext *ctx,
+ const struct fp_src_register *source,
+ 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 );
}