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svga: add comments and reformat code in svga_tgsi_decl_sm30.c

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This commit is contained in:
Brian Paul
2011-11-04 13:39:19 -06:00
parent d2633af696
commit 0bc15650c1
1 changed files with 85 additions and 47 deletions
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src/gallium/drivers/svga/svga_tgsi_decl_sm30.c
+85 -47
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@@ -31,10 +31,15 @@
#include "svga_tgsi_emit.h"
static boolean translate_vs_ps_semantic( struct svga_shader_emitter *emit,
struct tgsi_declaration_semantic semantic,
unsigned *usage,
unsigned *idx )
/**
* Translate TGSI semantic info into SVGA3d semantic info.
* This is called for VS outputs and PS inputs only.
*/
static boolean
translate_vs_ps_semantic(struct svga_shader_emitter *emit,
struct tgsi_declaration_semantic semantic,
unsigned *usage,
unsigned *idx)
{
switch (semantic.Name) {
case TGSI_SEMANTIC_POSITION:
@@ -42,7 +47,6 @@ static boolean translate_vs_ps_semantic( struct svga_shader_emitter *emit,
*usage = SVGA3D_DECLUSAGE_POSITION;
break;
case TGSI_SEMANTIC_COLOR:
*idx = semantic.Index;
*usage = SVGA3D_DECLUSAGE_COLOR;
break;
@@ -79,10 +83,16 @@ static boolean translate_vs_ps_semantic( struct svga_shader_emitter *emit,
}
static boolean emit_decl( struct svga_shader_emitter *emit,
SVGA3dShaderDestToken reg,
unsigned usage,
unsigned index )
/**
* Emit a PS input (or VS depth/fog output) register declaration.
* For example, if usage = SVGA3D_DECLUSAGE_TEXCOORD, reg.num = 1, and
* index = 3, we'll emit "dcl_texcoord3 v1".
*/
static boolean
emit_decl(struct svga_shader_emitter *emit,
SVGA3dShaderDestToken reg,
unsigned usage,
unsigned index)
{
SVGA3DOpDclArgs dcl;
SVGA3dShaderInstToken opcode;
@@ -100,16 +110,20 @@ static boolean emit_decl( struct svga_shader_emitter *emit,
dcl.index = index;
dcl.values[0] |= 1<<31;
return (emit_instruction(emit, opcode) &&
svga_shader_emit_dwords( emit, dcl.values, Elements(dcl.values)));
return (emit_instruction(emit, opcode) &&
svga_shader_emit_dwords( emit, dcl.values, Elements(dcl.values)));
}
static boolean emit_vface_decl( struct svga_shader_emitter *emit )
/**
* Emit declaration for PS front/back-face input register.
*/
static boolean
emit_vface_decl(struct svga_shader_emitter *emit)
{
if (!emit->emitted_vface) {
SVGA3dShaderDestToken reg =
dst_register( SVGA3DREG_MISCTYPE,
SVGA3DMISCREG_FACE );
dst_register(SVGA3DREG_MISCTYPE, SVGA3DMISCREG_FACE);
if (!emit_decl( emit, reg, 0, 0 ))
return FALSE;
@@ -119,13 +133,17 @@ static boolean emit_vface_decl( struct svga_shader_emitter *emit )
return TRUE;
}
/**
* Emit PS input register to pass depth/fog coordinates.
* Note that this always goes into texcoord[0].
*/
static boolean
ps30_input_emit_depth_fog( struct svga_shader_emitter *emit,
struct src_register *out )
{
struct src_register reg;
if (emit->emitted_depth_fog) {
*out = emit->ps_depth_fog;
return TRUE;
@@ -144,9 +162,15 @@ ps30_input_emit_depth_fog( struct svga_shader_emitter *emit,
return emit_decl( emit, dst( reg ), SVGA3D_DECLUSAGE_TEXCOORD, 0 );
}
static boolean ps30_input( struct svga_shader_emitter *emit,
struct tgsi_declaration_semantic semantic,
unsigned idx )
/**
* Process a PS input declaration.
* We'll emit a declaration like "dcl_texcoord1 v2"
*/
static boolean
ps30_input(struct svga_shader_emitter *emit,
struct tgsi_declaration_semantic semantic,
unsigned idx)
{
unsigned usage, index;
SVGA3dShaderDestToken reg;
@@ -285,11 +309,14 @@ static boolean ps30_input( struct svga_shader_emitter *emit,
}
/* PS output registers are the same as 2.0
/**
* Process a PS output declaration.
* Note that we don't actually emit a SVGA3DOpDcl for PS outputs.
*/
static boolean ps30_output( struct svga_shader_emitter *emit,
struct tgsi_declaration_semantic semantic,
unsigned idx )
static boolean
ps30_output(struct svga_shader_emitter *emit,
struct tgsi_declaration_semantic semantic,
unsigned idx)
{
SVGA3dShaderDestToken reg;
@@ -326,11 +353,14 @@ static boolean ps30_output( struct svga_shader_emitter *emit,
}
/* We still make up the input semantics the same as in 2.0
/**
* Declare a VS input register.
* We still make up the input semantics the same as in 2.0
*/
static boolean vs30_input( struct svga_shader_emitter *emit,
struct tgsi_declaration_semantic semantic,
unsigned idx )
static boolean
vs30_input(struct svga_shader_emitter *emit,
struct tgsi_declaration_semantic semantic,
unsigned idx)
{
SVGA3DOpDclArgs dcl;
SVGA3dShaderInstToken opcode;
@@ -365,14 +395,19 @@ static boolean vs30_input( struct svga_shader_emitter *emit,
dcl.index = index;
dcl.values[0] |= 1<<31;
return (emit_instruction(emit, opcode) &&
svga_shader_emit_dwords( emit, dcl.values, Elements(dcl.values)));
return (emit_instruction(emit, opcode) &&
svga_shader_emit_dwords( emit, dcl.values, Elements(dcl.values)));
}
return TRUE;
}
static boolean vs30_output_emit_depth_fog( struct svga_shader_emitter *emit,
SVGA3dShaderDestToken *out )
/**
* Declare VS output for holding depth/fog.
*/
static boolean
vs30_output_emit_depth_fog(struct svga_shader_emitter *emit,
SVGA3dShaderDestToken *out)
{
SVGA3dShaderDestToken reg;
@@ -390,12 +425,16 @@ static boolean vs30_output_emit_depth_fog( struct svga_shader_emitter *emit,
return emit_decl( emit, reg, SVGA3D_DECLUSAGE_TEXCOORD, 0 );
}
/* VS3.0 outputs have proper declarations and semantic info for
/**
* Declare a VS output.
* VS3.0 outputs have proper declarations and semantic info for
* matching against PS inputs.
*/
static boolean vs30_output( struct svga_shader_emitter *emit,
struct tgsi_declaration_semantic semantic,
unsigned idx )
static boolean
vs30_output(struct svga_shader_emitter *emit,
struct tgsi_declaration_semantic semantic,
unsigned idx)
{
SVGA3DOpDclArgs dcl;
SVGA3dShaderInstToken opcode;
@@ -457,14 +496,15 @@ static boolean vs30_output( struct svga_shader_emitter *emit,
emit->output_map[idx] = dcl.dst;
}
return (emit_instruction(emit, opcode) &&
svga_shader_emit_dwords( emit, dcl.values, Elements(dcl.values)));
return (emit_instruction(emit, opcode) &&
svga_shader_emit_dwords( emit, dcl.values, Elements(dcl.values)));
}
static boolean ps30_sampler( struct svga_shader_emitter *emit,
struct tgsi_declaration_semantic semantic,
unsigned idx )
static boolean
ps30_sampler( struct svga_shader_emitter *emit,
struct tgsi_declaration_semantic semantic,
unsigned idx )
{
SVGA3DOpDclArgs dcl;
SVGA3dShaderInstToken opcode;
@@ -477,13 +517,14 @@ static boolean ps30_sampler( struct svga_shader_emitter *emit,
dcl.type = svga_tgsi_sampler_type( emit, idx );
dcl.values[0] |= 1<<31;
return (emit_instruction(emit, opcode) &&
svga_shader_emit_dwords( emit, dcl.values, Elements(dcl.values)));
return (emit_instruction(emit, opcode) &&
svga_shader_emit_dwords( emit, dcl.values, Elements(dcl.values)));
}
boolean svga_translate_decl_sm30( struct svga_shader_emitter *emit,
const struct tgsi_full_declaration *decl )
boolean
svga_translate_decl_sm30( struct svga_shader_emitter *emit,
const struct tgsi_full_declaration *decl )
{
unsigned first = decl->Range.First;
unsigned last = decl->Range.Last;
@@ -530,6 +571,3 @@ boolean svga_translate_decl_sm30( struct svga_shader_emitter *emit,
return TRUE;
}