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-rw-r--r--src/mesa/main/texenvprogram.c772
1 files changed, 772 insertions, 0 deletions
diff --git a/src/mesa/main/texenvprogram.c b/src/mesa/main/texenvprogram.c
new file mode 100644
index 0000000000..448c577b79
--- /dev/null
+++ b/src/mesa/main/texenvprogram.c
@@ -0,0 +1,772 @@
+/**************************************************************************
+ *
+ * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+#include <strings.h>
+
+#include "glheader.h"
+#include "macros.h"
+#include "enums.h"
+#include "texenvprogram.h"
+
+#include "shader/program.h"
+#include "shader/nvfragprog.h"
+#include "shader/arbfragparse.h"
+
+
+#define DISASSEM 1
+
+/* Use uregs to represent registers internally, translate to Mesa's
+ * expected formats on emit.
+ *
+ * NOTE: These are passed by value extensively in this file rather
+ * than as usual by pointer reference. If this disturbs you, try
+ * remembering they are just 32bits in size.
+ *
+ * GCC is smart enough to deal with these dword-sized structures in
+ * much the same way as if I had defined them as dwords and was using
+ * macros to access and set the fields. This is much nicer and easier
+ * to evolve.
+ */
+struct ureg {
+ GLuint file:4;
+ GLuint idx:8;
+ GLuint negatebase:1;
+ GLuint abs:1;
+ GLuint negateabs:1;
+ GLuint swz:12;
+ GLuint pad:5;
+};
+
+const static struct ureg undef = {
+ ~0,
+ ~0,
+ 0,
+ 0,
+ 0,
+ 0,
+ 0
+};
+
+#define X 0
+#define Y 1
+#define Z 2
+#define W 3
+
+#define MAX_CONSTANT 32
+
+/* State used to build the fragment program:
+ */
+struct texenv_fragment_program {
+ struct fragment_program *prog;
+ GLcontext *ctx;
+
+ GLfloat constant[MAX_CONSTANT][4];
+ GLuint constant_flags[MAX_CONSTANT];
+ GLuint nr_constants;
+
+ GLuint temp_flag; /* Tracks temporary regs which are in
+ * use.
+ */
+
+
+ struct {
+ GLuint reg; /* Hardware constant idx */
+ const GLfloat *values; /* Pointer to tracked values */
+ } param[MAX_CONSTANT];
+ GLuint nr_params;
+
+
+ GLboolean error;
+
+ struct ureg src_texture; /* Reg containing sampled texture color,
+ * else undef.
+ */
+
+ struct ureg src_previous; /* Reg containing color from previous
+ * stage. May need to be decl'd.
+ */
+
+ GLuint last_tex_stage; /* Number of last enabled texture unit */
+};
+
+
+
+static struct ureg make_ureg(GLuint file, GLuint idx)
+{
+ struct ureg reg;
+ reg.file = file;
+ reg.idx = idx;
+ reg.negatebase = 0;
+ reg.abs = 0;
+ reg.negateabs = 0;
+ reg.swz = SWIZZLE_NOOP;
+ reg.pad = 0;
+ return reg;
+}
+
+static struct ureg swizzle( struct ureg reg, int x, int y, int z, int w )
+{
+ reg.swz = MAKE_SWIZZLE4(GET_SWZ(reg.swz, x),
+ GET_SWZ(reg.swz, y),
+ GET_SWZ(reg.swz, z),
+ GET_SWZ(reg.swz, w));
+
+ return reg;
+}
+
+static struct ureg swizzle1( struct ureg reg, int x )
+{
+ return swizzle(reg, x, x, x, x);
+}
+
+static GLboolean is_undef( struct ureg reg )
+{
+ return reg.file == 0xf;
+}
+
+static struct ureg get_temp( struct texenv_fragment_program *p )
+{
+ int bit = ffs( ~p->temp_flag );
+ if (!bit) {
+ fprintf(stderr, "%s: out of temporaries\n", __FILE__);
+ exit(1);
+ }
+
+ p->temp_flag |= 1<<(bit-1);
+ return make_ureg(PROGRAM_TEMPORARY, (bit-1));
+}
+
+
+static void release_temps( struct texenv_fragment_program *p )
+{
+ p->temp_flag = ~0x7;
+}
+
+
+static struct ureg emit_decl( struct texenv_fragment_program *p,
+ GLuint type, GLuint nr )
+{
+ struct ureg reg = make_ureg(type, nr);
+
+ if (type == PROGRAM_INPUT) {
+ p->prog->InputsRead |= 1<<nr;
+ }
+ else {
+ /* Other ???
+ */
+ }
+
+ return reg;
+}
+
+static void emit_arg( struct fp_src_register *reg,
+ struct ureg ureg )
+{
+ reg->File = ureg.file;
+ reg->Index = ureg.idx;
+ reg->Swizzle = ureg.swz;
+ reg->NegateBase = ureg.negatebase;
+ reg->Abs = ureg.abs;
+ reg->NegateAbs = ureg.negateabs;
+}
+
+static void emit_dst( struct fp_dst_register *dst,
+ struct ureg ureg, GLuint mask )
+{
+ dst->File = ureg.file;
+ dst->Index = ureg.idx;
+ dst->WriteMask = mask;
+ dst->CondMask = 0;
+ dst->CondSwizzle = 0;
+}
+
+static struct fp_instruction *
+emit_op(struct texenv_fragment_program *p,
+ GLuint op,
+ struct ureg dest,
+ GLuint mask,
+ GLuint saturate,
+ struct ureg src0,
+ struct ureg src1,
+ struct ureg src2 )
+{
+ GLuint nr = p->prog->Base.NumInstructions++;
+ struct fp_instruction *inst = &p->prog->Instructions[nr];
+
+ memset(inst, 0, sizeof(*inst));
+ inst->Opcode = op;
+
+ if (!is_undef(src0)) emit_arg( &inst->SrcReg[0], src0 );
+ if (!is_undef(src1)) emit_arg( &inst->SrcReg[1], src1 );
+ if (!is_undef(src2)) emit_arg( &inst->SrcReg[2], src2 );
+
+ inst->Saturate = saturate;
+
+ emit_dst( &inst->DstReg, dest, mask );
+
+ return inst;
+}
+
+
+static struct ureg emit_arith( struct texenv_fragment_program *p,
+ GLuint op,
+ struct ureg dest,
+ GLuint mask,
+ GLuint saturate,
+ struct ureg src0,
+ struct ureg src1,
+ struct ureg src2 )
+{
+ emit_op(p, op, dest, mask, saturate, src0, src1, src2);
+
+ p->prog->NumAluInstructions++;
+ return dest;
+}
+
+static struct ureg emit_texld( struct texenv_fragment_program *p,
+ GLuint op,
+ struct ureg dest,
+ GLuint destmask,
+ GLuint tex_unit,
+ GLuint tex_idx,
+ struct ureg coord )
+{
+ struct fp_instruction *inst = emit_op( p, op,
+ dest, destmask,
+ 0, /* don't saturate? */
+ coord, /* arg 0? */
+ undef,
+ undef);
+
+ inst->TexSrcIdx = tex_idx;
+ inst->TexSrcUnit = tex_unit;
+
+ p->prog->NumTexInstructions++;
+
+ if (coord.file != PROGRAM_INPUT &&
+ (coord.idx < VERT_ATTRIB_TEX0 ||
+ coord.idx > VERT_ATTRIB_TEX7)) {
+ p->prog->NumTexIndirections++;
+ }
+
+ return dest;
+}
+
+
+static struct ureg emit_const1f( struct texenv_fragment_program *p, GLfloat c0 )
+{
+ GLint reg, idx;
+
+ for (reg = 0; reg < MAX_CONSTANT; reg++) {
+ for (idx = 0; idx < 4; idx++) {
+ if (!(p->constant_flags[reg] & (1<<idx)) ||
+ p->constant[reg][idx] == c0) {
+ p->constant[reg][idx] = c0;
+ p->constant_flags[reg] |= 1<<idx;
+ if (reg+1 > p->nr_constants) p->nr_constants = reg+1;
+ return swizzle1(make_ureg(PROGRAM_LOCAL_PARAM, reg),idx);
+ }
+ }
+ }
+
+ fprintf(stderr, "%s: out of constants\n", __FUNCTION__);
+ p->error = 1;
+ return undef;
+}
+
+static struct ureg emit_const2f( struct texenv_fragment_program *p,
+ GLfloat c0, GLfloat c1 )
+{
+ GLint reg, idx;
+
+ for (reg = 0; reg < MAX_CONSTANT; reg++) {
+ if (p->constant_flags[reg] == 0xf)
+ continue;
+ for (idx = 0; idx < 3; idx++) {
+ if (!(p->constant_flags[reg] & (3<<idx))) {
+ p->constant[reg][idx] = c0;
+ p->constant[reg][idx+1] = c1;
+ p->constant_flags[reg] |= 3<<idx;
+ if (reg+1 > p->nr_constants) p->nr_constants = reg+1;
+ return swizzle(make_ureg(PROGRAM_LOCAL_PARAM, reg),idx,idx+1,idx,idx+1);
+ }
+ }
+ }
+
+ fprintf(stderr, "%s: out of constants\n", __FUNCTION__);
+ p->error = 1;
+ return undef;
+}
+
+
+
+static struct ureg emit_const4f( struct texenv_fragment_program *p,
+ GLfloat c0, GLfloat c1, GLfloat c2, GLfloat c3 )
+{
+ GLint reg;
+
+ for (reg = 0; reg < MAX_CONSTANT; reg++) {
+ if (p->constant_flags[reg] == 0xf &&
+ p->constant[reg][0] == c0 &&
+ p->constant[reg][1] == c1 &&
+ p->constant[reg][2] == c2 &&
+ p->constant[reg][3] == c3) {
+ return make_ureg(PROGRAM_LOCAL_PARAM, reg);
+ }
+ else if (p->constant_flags[reg] == 0) {
+ p->constant[reg][0] = c0;
+ p->constant[reg][1] = c1;
+ p->constant[reg][2] = c2;
+ p->constant[reg][3] = c3;
+ p->constant_flags[reg] = 0xf;
+ if (reg+1 > p->nr_constants) p->nr_constants = reg+1;
+ return make_ureg(PROGRAM_LOCAL_PARAM, reg);
+ }
+ }
+
+ fprintf(stderr, "%s: out of constants\n", __FUNCTION__);
+ p->error = 1;
+ return undef;
+}
+
+
+static struct ureg emit_const4fv( struct texenv_fragment_program *p, const GLfloat *c )
+{
+ return emit_const4f( p, c[0], c[1], c[2], c[3] );
+}
+
+
+
+
+
+
+static void program_error( struct texenv_fragment_program *p, const char *msg )
+{
+ fprintf(stderr, "%s\n", msg);
+ p->error = 1;
+}
+
+
+static GLuint translate_tex_src_bit( struct texenv_fragment_program *p,
+ GLuint bit )
+{
+ switch (bit) {
+ case TEXTURE_1D_BIT: return TEXTURE_1D_INDEX;
+ case TEXTURE_2D_BIT: return TEXTURE_2D_INDEX;
+ case TEXTURE_RECT_BIT: return TEXTURE_RECT_INDEX;
+ case TEXTURE_3D_BIT: return TEXTURE_3D_INDEX;
+ case TEXTURE_CUBE_BIT: return TEXTURE_CUBE_INDEX;
+ default: program_error(p, "TexSrcBit"); return 0;
+ }
+}
+
+
+static struct ureg get_source( struct texenv_fragment_program *p,
+ GLenum src, GLuint unit )
+{
+ switch (src) {
+ case GL_TEXTURE:
+ if (is_undef(p->src_texture)) {
+
+ GLuint dim = translate_tex_src_bit( p, p->ctx->Texture.Unit[unit]._ReallyEnabled);
+ struct ureg texcoord = emit_decl(p,
+ PROGRAM_INPUT,
+ VERT_ATTRIB_TEX0+unit);
+ struct ureg tmp = get_temp( p );
+
+ /* TODO: Use D0_MASK_XY where possible.
+ */
+ p->src_texture = emit_texld( p, FP_OPCODE_TXP,
+ tmp, WRITEMASK_XYZW,
+ unit, dim, texcoord );
+ }
+
+ return p->src_texture;
+
+ /* Crossbar: */
+ case GL_TEXTURE0:
+ case GL_TEXTURE1:
+ case GL_TEXTURE2:
+ case GL_TEXTURE3:
+ case GL_TEXTURE4:
+ case GL_TEXTURE5:
+ case GL_TEXTURE6:
+ case GL_TEXTURE7: {
+ return undef;
+ }
+
+ case GL_CONSTANT:
+ return emit_const4fv( p, p->ctx->Texture.Unit[unit].EnvColor );
+ case GL_PRIMARY_COLOR:
+ return emit_decl(p, PROGRAM_INPUT, VERT_ATTRIB_COLOR0);
+ case GL_PREVIOUS:
+ default:
+ return emit_decl(p,
+ p->src_previous.file,
+ p->src_previous.idx);
+ }
+}
+
+
+static struct ureg emit_combine_source( struct texenv_fragment_program *p,
+ GLuint mask,
+ GLuint unit,
+ GLenum source,
+ GLenum operand )
+{
+ struct ureg arg, src, one;
+
+ src = get_source(p, source, unit);
+
+ switch (operand) {
+ case GL_ONE_MINUS_SRC_COLOR:
+ /* Get unused tmp,
+ * Emit tmp = 1.0 - arg.xyzw
+ */
+ arg = get_temp( p );
+ one = emit_const1f(p, 1);
+ return emit_arith( p, FP_OPCODE_SUB, arg, mask, 0, one, src, undef);
+
+ case GL_SRC_ALPHA:
+ if (mask == WRITEMASK_W)
+ return src;
+ else
+ return swizzle1( src, W );
+ case GL_ONE_MINUS_SRC_ALPHA:
+ /* Get unused tmp,
+ * Emit tmp = 1.0 - arg.wwww
+ */
+ arg = get_temp( p );
+ one = emit_const1f(p, 1);
+ return emit_arith( p, FP_OPCODE_SUB, arg, mask, 0,
+ one, swizzle1(src, W), undef);
+ case GL_SRC_COLOR:
+ default:
+ return src;
+ }
+}
+
+
+
+static int nr_args( GLenum mode )
+{
+ switch (mode) {
+ case GL_REPLACE: return 1;
+ case GL_MODULATE: return 2;
+ case GL_ADD: return 2;
+ case GL_ADD_SIGNED: return 2;
+ case GL_INTERPOLATE: return 3;
+ case GL_SUBTRACT: return 2;
+ case GL_DOT3_RGB_EXT: return 2;
+ case GL_DOT3_RGBA_EXT: return 2;
+ case GL_DOT3_RGB: return 2;
+ case GL_DOT3_RGBA: return 2;
+ default: return 0;
+ }
+}
+
+
+static GLboolean args_match( struct gl_texture_unit *texUnit )
+{
+ int i, nr = nr_args(texUnit->_CurrentCombine->ModeRGB);
+
+ for (i = 0 ; i < nr ; i++) {
+ if (texUnit->_CurrentCombine->SourceA[i] != texUnit->_CurrentCombine->SourceRGB[i])
+ return GL_FALSE;
+
+ switch(texUnit->_CurrentCombine->OperandA[i]) {
+ case GL_SRC_ALPHA:
+ switch(texUnit->_CurrentCombine->OperandRGB[i]) {
+ case GL_SRC_COLOR:
+ case GL_SRC_ALPHA:
+ break;
+ default:
+ return GL_FALSE;
+ }
+ break;
+ case GL_ONE_MINUS_SRC_ALPHA:
+ switch(texUnit->_CurrentCombine->OperandRGB[i]) {
+ case GL_ONE_MINUS_SRC_COLOR:
+ case GL_ONE_MINUS_SRC_ALPHA:
+ break;
+ default:
+ return GL_FALSE;
+ }
+ break;
+ default:
+ return GL_FALSE; /* impossible */
+ }
+ }
+
+ return GL_TRUE;
+}
+
+
+static struct ureg emit_combine( struct texenv_fragment_program *p,
+ struct ureg dest,
+ GLuint mask,
+ GLuint saturate,
+ GLuint unit,
+ GLenum mode,
+ const GLenum *source,
+ const GLenum *operand)
+{
+ int nr = nr_args(mode);
+ struct ureg src[3];
+ struct ureg tmp;
+ int i;
+
+ for (i = 0; i < nr; i++)
+ src[i] = emit_combine_source( p, mask, unit, source[i], operand[i] );
+
+ switch (mode) {
+ case GL_REPLACE:
+ if (mask == WRITEMASK_XYZW && !saturate)
+ return src[0];
+ else
+ return emit_arith( p, FP_OPCODE_MOV, dest, mask, saturate, src[0], undef, undef );
+ case GL_MODULATE:
+ return emit_arith( p, FP_OPCODE_MUL, dest, mask, saturate,
+ src[0], src[1], undef );
+ case GL_ADD:
+ return emit_arith( p, FP_OPCODE_ADD, dest, mask, saturate,
+ src[0], src[1], undef );
+ case GL_ADD_SIGNED:
+ /* tmp = arg0 + arg1
+ * result = tmp + -.5
+ */
+ tmp = emit_const1f(p, .5);
+ tmp = swizzle1(tmp,X);
+ emit_arith( p, FP_OPCODE_ADD, dest, mask, 0, src[0], src[1], undef );
+ emit_arith( p, FP_OPCODE_SUB, dest, mask, saturate, dest, tmp, undef );
+ return dest;
+ case GL_INTERPOLATE:
+ /* Arg0 * (Arg2) + Arg1 * (1-Arg2) -- note arguments are reordered:
+ */
+ return emit_arith( p, FP_OPCODE_LRP, dest, mask, saturate, src[2], src[0], src[1] );
+
+ case GL_SUBTRACT:
+ return emit_arith( p, FP_OPCODE_SUB, dest, mask, saturate, src[0], src[1], undef );
+
+ case GL_DOT3_RGBA:
+ case GL_DOT3_RGBA_EXT:
+ case GL_DOT3_RGB_EXT:
+ case GL_DOT3_RGB: {
+ struct ureg tmp0 = get_temp( p );
+ struct ureg tmp1 = get_temp( p );
+ struct ureg neg1 = emit_const1f(p, -1);
+ struct ureg two = emit_const1f(p, 2);
+
+ /* tmp0 = 2*src0 - 1
+ * tmp1 = 2*src1 - 1
+ *
+ * dst = tmp0 dot3 tmp1
+ */
+ emit_arith( p, FP_OPCODE_MAD, tmp0, WRITEMASK_XYZW, 0,
+ two, src[0], neg1);
+
+ if (memcmp(&src[0], &src[1], sizeof(struct ureg)) == 0)
+ tmp1 = tmp0;
+ else
+ emit_arith( p, FP_OPCODE_MAD, tmp1, WRITEMASK_XYZW, 0,
+ two, src[1], neg1);
+ emit_arith( p, FP_OPCODE_DP3, dest, mask, saturate, tmp0, tmp1, undef);
+ return dest;
+ }
+
+ default:
+ return src[0];
+ }
+}
+
+static struct ureg get_dest( struct texenv_fragment_program *p, int unit )
+{
+ if (p->ctx->_TriangleCaps & DD_SEPARATE_SPECULAR)
+ return get_temp( p );
+ else if (unit != p->last_tex_stage)
+ return get_temp( p );
+ else
+ return make_ureg(PROGRAM_OUTPUT, VERT_ATTRIB_COLOR0);
+}
+
+
+
+static struct ureg emit_texenv( struct texenv_fragment_program *p, int unit )
+{
+ struct gl_texture_unit *texUnit = &p->ctx->Texture.Unit[unit];
+ GLuint saturate = (unit < p->last_tex_stage);
+ GLuint rgb_shift, alpha_shift;
+ struct ureg out, shift;
+ struct ureg dest = get_dest(p, unit);
+
+ if (!texUnit->_ReallyEnabled) {
+ return get_source(p, GL_PREVIOUS, 0);
+ }
+
+ switch (texUnit->_CurrentCombine->ModeRGB) {
+ case GL_DOT3_RGB_EXT:
+ alpha_shift = texUnit->_CurrentCombine->ScaleShiftA;
+ rgb_shift = 0;
+ break;
+
+ case GL_DOT3_RGBA_EXT:
+ alpha_shift = 0;
+ rgb_shift = 0;
+ break;
+
+ default:
+ rgb_shift = texUnit->_CurrentCombine->ScaleShiftRGB;
+ alpha_shift = texUnit->_CurrentCombine->ScaleShiftA;
+ break;
+ }
+
+
+ /* Emit the RGB and A combine ops
+ */
+ if (texUnit->_CurrentCombine->ModeRGB == texUnit->_CurrentCombine->ModeA &&
+ args_match( texUnit )) {
+ out = emit_combine( p, dest, WRITEMASK_XYZW, saturate,
+ unit,
+ texUnit->_CurrentCombine->ModeRGB,
+ texUnit->_CurrentCombine->SourceRGB,
+ texUnit->_CurrentCombine->OperandRGB );
+ }
+ else if (texUnit->_CurrentCombine->ModeRGB == GL_DOT3_RGBA_EXT ||
+ texUnit->_CurrentCombine->ModeRGB == GL_DOT3_RGBA) {
+
+ out = emit_combine( p, dest, WRITEMASK_XYZW, saturate,
+ unit,
+ texUnit->_CurrentCombine->ModeRGB,
+ texUnit->_CurrentCombine->SourceRGB,
+ texUnit->_CurrentCombine->OperandRGB );
+ }
+ else {
+ /* Need to do something to stop from re-emitting identical
+ * argument calculations here:
+ */
+ out = emit_combine( p, dest, WRITEMASK_XYZ, saturate,
+ unit,
+ texUnit->_CurrentCombine->ModeRGB,
+ texUnit->_CurrentCombine->SourceRGB,
+ texUnit->_CurrentCombine->OperandRGB );
+ out = emit_combine( p, dest, WRITEMASK_W, saturate,
+ unit,
+ texUnit->_CurrentCombine->ModeA,
+ texUnit->_CurrentCombine->SourceA,
+ texUnit->_CurrentCombine->OperandA );
+ }
+
+ /* Deal with the final shift:
+ */
+ if (alpha_shift || rgb_shift) {
+ if (rgb_shift == alpha_shift) {
+ shift = emit_const1f(p, 1<<rgb_shift);
+ shift = swizzle1(shift,X);
+ }
+ else {
+ shift = emit_const2f(p, 1<<rgb_shift, 1<<alpha_shift);
+ shift = swizzle(shift,X,X,X,Y);
+ }
+ return emit_arith( p, FP_OPCODE_MUL, dest, WRITEMASK_XYZW,
+ saturate, out, shift, undef );
+ }
+ else
+ return out;
+}
+
+void _mesa_UpdateTexEnvProgram( GLcontext *ctx )
+{
+ struct texenv_fragment_program p;
+ GLuint unit;
+ struct ureg cf, out;
+
+ p.ctx = ctx;
+ p.prog = &ctx->_TexEnvProgram;
+
+ if (p.prog->Instructions == NULL) {
+ p.prog->Instructions = MALLOC(sizeof(struct fp_instruction) * 100);
+ }
+
+ p.prog->Base.NumInstructions = 0;
+ p.prog->NumTexIndirections = 1; /* correct? */
+ p.prog->NumTexInstructions = 0;
+ p.prog->NumAluInstructions = 0;
+
+ memset( p.constant_flags, 0, sizeof(p.constant_flags) );
+
+ p.src_texture = undef;
+ p.src_previous = make_ureg(PROGRAM_INPUT, VERT_ATTRIB_COLOR0);
+ p.last_tex_stage = 0;
+
+ if (ctx->Texture._EnabledUnits) {
+ for (unit = 0 ; unit < ctx->Const.MaxTextureUnits ; unit++)
+ if (ctx->Texture.Unit[unit]._ReallyEnabled) {
+ p.last_tex_stage = unit;
+ }
+
+ for (unit = 0 ; unit < ctx->Const.MaxTextureUnits; unit++)
+ if (ctx->Texture.Unit[unit]._ReallyEnabled) {
+ p.src_previous = emit_texenv( &p, unit );
+ p.src_texture = undef;
+ p.temp_flag = 0xffff000;
+ p.temp_flag |= 1 << p.src_previous.idx;
+ }
+ }
+
+ cf = get_source( &p, GL_PREVIOUS, 0 );
+ out = make_ureg( PROGRAM_OUTPUT, VERT_ATTRIB_COLOR0 );
+
+ if (ctx->_TriangleCaps & DD_SEPARATE_SPECULAR) {
+ /* Emit specular add.
+ */
+ struct ureg s = emit_decl(&p, PROGRAM_INPUT, VERT_ATTRIB_COLOR1);
+ emit_arith( &p, FP_OPCODE_ADD, out, WRITEMASK_XYZ, 0, cf, s, undef );
+ }
+ else if (memcmp(&cf, &out, sizeof(cf)) != 0) {
+ /* Will wind up in here if no texture enabled or a couple of
+ * other scenarios (GL_REPLACE for instance).
+ */
+ emit_arith( &p, FP_OPCODE_MOV, out, WRITEMASK_XYZW, 0, cf, undef, undef );
+ }
+
+ if (p.prog->NumTexIndirections > ctx->Const.MaxFragmentProgramTexIndirections)
+ program_error(&p, "Exceeded max nr indirect texture lookups");
+
+ if (p.prog->NumTexInstructions > ctx->Const.MaxFragmentProgramTexInstructions)
+ program_error(&p, "Exceeded max TEX instructions");
+
+ if (p.prog->NumAluInstructions > ctx->Const.MaxFragmentProgramAluInstructions)
+ program_error(&p, "Exceeded max ALU instructions");
+
+#if DISASSEM
+ _mesa_debug_fp_inst(p.prog->NumTexInstructions + p.prog->NumAluInstructions,
+ p.prog->Instructions);
+ _mesa_printf("\n");
+#endif
+}
+
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-20 09:54:46 +0000