| /************************************************************************** |
| * |
| * 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 "glheader.h" |
| #include "macros.h" |
| #include "enums.h" |
| #include "shader/program.h" |
| #include "shader/prog_parameter.h" |
| #include "shader/prog_instruction.h" |
| #include "shader/prog_print.h" |
| #include "shader/prog_statevars.h" |
| #include "texenvprogram.h" |
| |
| |
| struct texenvprog_cache_item |
| { |
| GLuint hash; |
| void *key; |
| struct gl_fragment_program *data; |
| struct texenvprog_cache_item *next; |
| }; |
| |
| |
| /** |
| * This MAX is probably a bit generous, but that's OK. There can be |
| * up to four instructions per texture unit (TEX + 3 for combine), |
| * then there's fog and specular add. |
| */ |
| #define MAX_INSTRUCTIONS ((MAX_TEXTURE_UNITS * 4) + 12) |
| |
| #define DISASSEM (MESA_VERBOSE & VERBOSE_DISASSEM) |
| |
| struct mode_opt { |
| GLuint Source:4; |
| GLuint Operand:3; |
| }; |
| |
| struct state_key { |
| GLbitfield enabled_units; |
| GLuint separate_specular:1; |
| GLuint fog_enabled:1; |
| GLuint fog_mode:2; |
| |
| struct { |
| GLuint enabled:1; |
| GLuint source_index:3; /* one of TEXTURE_1D/2D/3D/CUBE/RECT_INDEX */ |
| GLuint shadow:1; |
| GLuint ScaleShiftRGB:2; |
| GLuint ScaleShiftA:2; |
| |
| GLuint NumArgsRGB:2; |
| GLuint ModeRGB:4; |
| struct mode_opt OptRGB[3]; |
| |
| GLuint NumArgsA:2; |
| GLuint ModeA:4; |
| struct mode_opt OptA[3]; |
| } unit[8]; |
| }; |
| |
| #define FOG_LINEAR 0 |
| #define FOG_EXP 1 |
| #define FOG_EXP2 2 |
| #define FOG_UNKNOWN 3 |
| |
| static GLuint translate_fog_mode( GLenum mode ) |
| { |
| switch (mode) { |
| case GL_LINEAR: return FOG_LINEAR; |
| case GL_EXP: return FOG_EXP; |
| case GL_EXP2: return FOG_EXP2; |
| default: return FOG_UNKNOWN; |
| } |
| } |
| |
| #define OPR_SRC_COLOR 0 |
| #define OPR_ONE_MINUS_SRC_COLOR 1 |
| #define OPR_SRC_ALPHA 2 |
| #define OPR_ONE_MINUS_SRC_ALPHA 3 |
| #define OPR_ZERO 4 |
| #define OPR_ONE 5 |
| #define OPR_UNKNOWN 7 |
| |
| static GLuint translate_operand( GLenum operand ) |
| { |
| switch (operand) { |
| case GL_SRC_COLOR: return OPR_SRC_COLOR; |
| case GL_ONE_MINUS_SRC_COLOR: return OPR_ONE_MINUS_SRC_COLOR; |
| case GL_SRC_ALPHA: return OPR_SRC_ALPHA; |
| case GL_ONE_MINUS_SRC_ALPHA: return OPR_ONE_MINUS_SRC_ALPHA; |
| case GL_ZERO: return OPR_ZERO; |
| case GL_ONE: return OPR_ONE; |
| default: return OPR_UNKNOWN; |
| } |
| } |
| |
| #define SRC_TEXTURE 0 |
| #define SRC_TEXTURE0 1 |
| #define SRC_TEXTURE1 2 |
| #define SRC_TEXTURE2 3 |
| #define SRC_TEXTURE3 4 |
| #define SRC_TEXTURE4 5 |
| #define SRC_TEXTURE5 6 |
| #define SRC_TEXTURE6 7 |
| #define SRC_TEXTURE7 8 |
| #define SRC_CONSTANT 9 |
| #define SRC_PRIMARY_COLOR 10 |
| #define SRC_PREVIOUS 11 |
| #define SRC_UNKNOWN 15 |
| |
| static GLuint translate_source( GLenum src ) |
| { |
| switch (src) { |
| case GL_TEXTURE: return SRC_TEXTURE; |
| 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 SRC_TEXTURE0 + (src - GL_TEXTURE0); |
| case GL_CONSTANT: return SRC_CONSTANT; |
| case GL_PRIMARY_COLOR: return SRC_PRIMARY_COLOR; |
| case GL_PREVIOUS: return SRC_PREVIOUS; |
| default: return SRC_UNKNOWN; |
| } |
| } |
| |
| #define MODE_REPLACE 0 |
| #define MODE_MODULATE 1 |
| #define MODE_ADD 2 |
| #define MODE_ADD_SIGNED 3 |
| #define MODE_INTERPOLATE 4 |
| #define MODE_SUBTRACT 5 |
| #define MODE_DOT3_RGB 6 |
| #define MODE_DOT3_RGB_EXT 7 |
| #define MODE_DOT3_RGBA 8 |
| #define MODE_DOT3_RGBA_EXT 9 |
| #define MODE_MODULATE_ADD_ATI 10 |
| #define MODE_MODULATE_SIGNED_ADD_ATI 11 |
| #define MODE_MODULATE_SUBTRACT_ATI 12 |
| #define MODE_UNKNOWN 15 |
| |
| static GLuint translate_mode( GLenum mode ) |
| { |
| switch (mode) { |
| case GL_REPLACE: return MODE_REPLACE; |
| case GL_MODULATE: return MODE_MODULATE; |
| case GL_ADD: return MODE_ADD; |
| case GL_ADD_SIGNED: return MODE_ADD_SIGNED; |
| case GL_INTERPOLATE: return MODE_INTERPOLATE; |
| case GL_SUBTRACT: return MODE_SUBTRACT; |
| case GL_DOT3_RGB: return MODE_DOT3_RGB; |
| case GL_DOT3_RGB_EXT: return MODE_DOT3_RGB_EXT; |
| case GL_DOT3_RGBA: return MODE_DOT3_RGBA; |
| case GL_DOT3_RGBA_EXT: return MODE_DOT3_RGBA_EXT; |
| case GL_MODULATE_ADD_ATI: return MODE_MODULATE_ADD_ATI; |
| case GL_MODULATE_SIGNED_ADD_ATI: return MODE_MODULATE_SIGNED_ADD_ATI; |
| case GL_MODULATE_SUBTRACT_ATI: return MODE_MODULATE_SUBTRACT_ATI; |
| default: return MODE_UNKNOWN; |
| } |
| } |
| |
| #define TEXTURE_UNKNOWN_INDEX 7 |
| static GLuint translate_tex_src_bit( GLbitfield 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: return TEXTURE_UNKNOWN_INDEX; |
| } |
| } |
| |
| /** |
| * Examine current texture environment state and generate a unique |
| * key to identify it. |
| */ |
| static void make_state_key( GLcontext *ctx, struct state_key *key ) |
| { |
| GLuint i, j; |
| |
| memset(key, 0, sizeof(*key)); |
| |
| for (i=0;i<MAX_TEXTURE_UNITS;i++) { |
| const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i]; |
| |
| if (!texUnit->_ReallyEnabled || !texUnit->Enabled) |
| continue; |
| |
| key->unit[i].enabled = 1; |
| key->enabled_units |= (1<<i); |
| |
| key->unit[i].source_index = |
| translate_tex_src_bit(texUnit->_ReallyEnabled); |
| key->unit[i].shadow = texUnit->_Current->CompareMode == GL_COMPARE_R_TO_TEXTURE; |
| |
| key->unit[i].NumArgsRGB = texUnit->_CurrentCombine->_NumArgsRGB; |
| key->unit[i].NumArgsA = texUnit->_CurrentCombine->_NumArgsA; |
| |
| key->unit[i].ModeRGB = |
| translate_mode(texUnit->_CurrentCombine->ModeRGB); |
| key->unit[i].ModeA = |
| translate_mode(texUnit->_CurrentCombine->ModeA); |
| |
| key->unit[i].ScaleShiftRGB = texUnit->_CurrentCombine->ScaleShiftRGB; |
| key->unit[i].ScaleShiftA = texUnit->_CurrentCombine->ScaleShiftA; |
| |
| for (j=0;j<3;j++) { |
| key->unit[i].OptRGB[j].Operand = |
| translate_operand(texUnit->_CurrentCombine->OperandRGB[j]); |
| key->unit[i].OptA[j].Operand = |
| translate_operand(texUnit->_CurrentCombine->OperandA[j]); |
| key->unit[i].OptRGB[j].Source = |
| translate_source(texUnit->_CurrentCombine->SourceRGB[j]); |
| key->unit[i].OptA[j].Source = |
| translate_source(texUnit->_CurrentCombine->SourceA[j]); |
| } |
| } |
| |
| if (ctx->_TriangleCaps & DD_SEPARATE_SPECULAR) |
| key->separate_specular = 1; |
| |
| if (ctx->Fog.Enabled) { |
| key->fog_enabled = 1; |
| key->fog_mode = translate_fog_mode(ctx->Fog.Mode); |
| } |
| } |
| |
| /* 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; |
| }; |
| |
| static const struct ureg undef = { |
| PROGRAM_UNDEFINED, |
| ~0, |
| 0, |
| 0, |
| 0, |
| 0, |
| 0 |
| }; |
| |
| |
| /* State used to build the fragment program: |
| */ |
| struct texenv_fragment_program { |
| struct gl_fragment_program *program; |
| GLcontext *ctx; |
| struct state_key *state; |
| |
| GLbitfield alu_temps; /* Track texture indirections, see spec. */ |
| GLbitfield temps_output; /* Track texture indirections, see spec. */ |
| GLbitfield temp_in_use; /* Tracks temporary regs which are in use. */ |
| GLboolean error; |
| |
| struct ureg src_texture[MAX_TEXTURE_UNITS]; |
| /* Reg containing each texture unit's 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 */ |
| |
| struct ureg half; |
| struct ureg one; |
| struct ureg zero; |
| }; |
| |
| |
| |
| 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 struct ureg negate( struct ureg reg ) |
| { |
| reg.negatebase ^= 1; |
| return reg; |
| } |
| |
| static GLboolean is_undef( struct ureg reg ) |
| { |
| return reg.file == PROGRAM_UNDEFINED; |
| } |
| |
| |
| static struct ureg get_temp( struct texenv_fragment_program *p ) |
| { |
| GLint bit; |
| |
| /* First try and reuse temps which have been used already: |
| */ |
| bit = _mesa_ffs( ~p->temp_in_use & p->alu_temps ); |
| |
| /* Then any unused temporary: |
| */ |
| if (!bit) |
| bit = _mesa_ffs( ~p->temp_in_use ); |
| |
| if (!bit) { |
| _mesa_problem(NULL, "%s: out of temporaries\n", __FILE__); |
| _mesa_exit(1); |
| } |
| |
| if ((GLuint) bit > p->program->Base.NumTemporaries) |
| p->program->Base.NumTemporaries = bit; |
| |
| p->temp_in_use |= 1<<(bit-1); |
| return make_ureg(PROGRAM_TEMPORARY, (bit-1)); |
| } |
| |
| static struct ureg get_tex_temp( struct texenv_fragment_program *p ) |
| { |
| int bit; |
| |
| /* First try to find availble temp not previously used (to avoid |
| * starting a new texture indirection). According to the spec, the |
| * ~p->temps_output isn't necessary, but will keep it there for |
| * now: |
| */ |
| bit = _mesa_ffs( ~p->temp_in_use & ~p->alu_temps & ~p->temps_output ); |
| |
| /* Then any unused temporary: |
| */ |
| if (!bit) |
| bit = _mesa_ffs( ~p->temp_in_use ); |
| |
| if (!bit) { |
| _mesa_problem(NULL, "%s: out of temporaries\n", __FILE__); |
| _mesa_exit(1); |
| } |
| |
| if ((GLuint) bit > p->program->Base.NumTemporaries) |
| p->program->Base.NumTemporaries = bit; |
| |
| p->temp_in_use |= 1<<(bit-1); |
| return make_ureg(PROGRAM_TEMPORARY, (bit-1)); |
| } |
| |
| |
| static void release_temps( struct texenv_fragment_program *p ) |
| { |
| GLuint max_temp = p->ctx->Const.FragmentProgram.MaxTemps; |
| |
| /* KW: To support tex_env_crossbar, don't release the registers in |
| * temps_output. |
| */ |
| if (max_temp >= sizeof(int) * 8) |
| p->temp_in_use = p->temps_output; |
| else |
| p->temp_in_use = ~((1<<max_temp)-1) | p->temps_output; |
| } |
| |
| |
| static struct ureg register_param5( struct texenv_fragment_program *p, |
| GLint s0, |
| GLint s1, |
| GLint s2, |
| GLint s3, |
| GLint s4) |
| { |
| gl_state_index tokens[STATE_LENGTH]; |
| GLuint idx; |
| tokens[0] = s0; |
| tokens[1] = s1; |
| tokens[2] = s2; |
| tokens[3] = s3; |
| tokens[4] = s4; |
| idx = _mesa_add_state_reference( p->program->Base.Parameters, tokens ); |
| return make_ureg(PROGRAM_STATE_VAR, idx); |
| } |
| |
| |
| #define register_param1(p,s0) register_param5(p,s0,0,0,0,0) |
| #define register_param2(p,s0,s1) register_param5(p,s0,s1,0,0,0) |
| #define register_param3(p,s0,s1,s2) register_param5(p,s0,s1,s2,0,0) |
| #define register_param4(p,s0,s1,s2,s3) register_param5(p,s0,s1,s2,s3,0) |
| |
| |
| static struct ureg register_input( struct texenv_fragment_program *p, GLuint input ) |
| { |
| p->program->Base.InputsRead |= (1 << input); |
| return make_ureg(PROGRAM_INPUT, input); |
| } |
| |
| |
| static void emit_arg( struct prog_src_register *reg, |
| struct ureg ureg ) |
| { |
| reg->File = ureg.file; |
| reg->Index = ureg.idx; |
| reg->Swizzle = ureg.swz; |
| reg->NegateBase = ureg.negatebase ? 0xf : 0x0; |
| reg->Abs = ureg.abs; |
| reg->NegateAbs = ureg.negateabs; |
| } |
| |
| static void emit_dst( struct prog_dst_register *dst, |
| struct ureg ureg, GLuint mask ) |
| { |
| dst->File = ureg.file; |
| dst->Index = ureg.idx; |
| dst->WriteMask = mask; |
| dst->CondMask = COND_TR; /* always pass cond test */ |
| dst->CondSwizzle = SWIZZLE_NOOP; |
| } |
| |
| static struct prog_instruction * |
| emit_op(struct texenv_fragment_program *p, |
| enum prog_opcode op, |
| struct ureg dest, |
| GLuint mask, |
| GLboolean saturate, |
| struct ureg src0, |
| struct ureg src1, |
| struct ureg src2 ) |
| { |
| GLuint nr = p->program->Base.NumInstructions++; |
| struct prog_instruction *inst = &p->program->Base.Instructions[nr]; |
| |
| assert(nr < MAX_INSTRUCTIONS); |
| |
| _mesa_init_instructions(inst, 1); |
| inst->Opcode = op; |
| |
| emit_arg( &inst->SrcReg[0], src0 ); |
| emit_arg( &inst->SrcReg[1], src1 ); |
| emit_arg( &inst->SrcReg[2], src2 ); |
| |
| inst->SaturateMode = saturate ? SATURATE_ZERO_ONE : SATURATE_OFF; |
| |
| emit_dst( &inst->DstReg, dest, mask ); |
| |
| /* Accounting for indirection tracking: |
| */ |
| if (dest.file == PROGRAM_TEMPORARY) |
| p->temps_output |= 1 << dest.idx; |
| |
| return inst; |
| } |
| |
| |
| static struct ureg emit_arith( struct texenv_fragment_program *p, |
| enum prog_opcode op, |
| struct ureg dest, |
| GLuint mask, |
| GLboolean saturate, |
| struct ureg src0, |
| struct ureg src1, |
| struct ureg src2 ) |
| { |
| emit_op(p, op, dest, mask, saturate, src0, src1, src2); |
| |
| /* Accounting for indirection tracking: |
| */ |
| if (src0.file == PROGRAM_TEMPORARY) |
| p->alu_temps |= 1 << src0.idx; |
| |
| if (!is_undef(src1) && src1.file == PROGRAM_TEMPORARY) |
| p->alu_temps |= 1 << src1.idx; |
| |
| if (!is_undef(src2) && src2.file == PROGRAM_TEMPORARY) |
| p->alu_temps |= 1 << src2.idx; |
| |
| if (dest.file == PROGRAM_TEMPORARY) |
| p->alu_temps |= 1 << dest.idx; |
| |
| p->program->Base.NumAluInstructions++; |
| return dest; |
| } |
| |
| static struct ureg emit_texld( struct texenv_fragment_program *p, |
| enum prog_opcode op, |
| struct ureg dest, |
| GLuint destmask, |
| GLuint tex_unit, |
| GLuint tex_idx, |
| struct ureg coord ) |
| { |
| struct prog_instruction *inst = emit_op( p, op, |
| dest, destmask, |
| GL_FALSE, /* don't saturate? */ |
| coord, /* arg 0? */ |
| undef, |
| undef); |
| |
| inst->TexSrcTarget = tex_idx; |
| inst->TexSrcUnit = tex_unit; |
| |
| p->program->Base.NumTexInstructions++; |
| |
| /* Is this a texture indirection? |
| */ |
| if ((coord.file == PROGRAM_TEMPORARY && |
| (p->temps_output & (1<<coord.idx))) || |
| (dest.file == PROGRAM_TEMPORARY && |
| (p->alu_temps & (1<<dest.idx)))) { |
| p->program->Base.NumTexIndirections++; |
| p->temps_output = 1<<coord.idx; |
| p->alu_temps = 0; |
| assert(0); /* KW: texture env crossbar */ |
| } |
| |
| return dest; |
| } |
| |
| |
| static struct ureg register_const4f( struct texenv_fragment_program *p, |
| GLfloat s0, |
| GLfloat s1, |
| GLfloat s2, |
| GLfloat s3) |
| { |
| GLfloat values[4]; |
| GLuint idx, swizzle; |
| values[0] = s0; |
| values[1] = s1; |
| values[2] = s2; |
| values[3] = s3; |
| idx = _mesa_add_unnamed_constant( p->program->Base.Parameters, values, 4, |
| &swizzle ); |
| ASSERT(swizzle == SWIZZLE_NOOP); |
| return make_ureg(PROGRAM_STATE_VAR, idx); |
| } |
| |
| #define register_scalar_const(p, s0) register_const4f(p, s0, s0, s0, s0) |
| #define register_const1f(p, s0) register_const4f(p, s0, 0, 0, 1) |
| #define register_const2f(p, s0, s1) register_const4f(p, s0, s1, 0, 1) |
| #define register_const3f(p, s0, s1, s2) register_const4f(p, s0, s1, s2, 1) |
| |
| |
| static struct ureg get_one( struct texenv_fragment_program *p ) |
| { |
| if (is_undef(p->one)) |
| p->one = register_scalar_const(p, 1.0); |
| return p->one; |
| } |
| |
| static struct ureg get_half( struct texenv_fragment_program *p ) |
| { |
| if (is_undef(p->half)) |
| p->half = register_scalar_const(p, 0.5); |
| return p->half; |
| } |
| |
| static struct ureg get_zero( struct texenv_fragment_program *p ) |
| { |
| if (is_undef(p->zero)) |
| p->zero = register_scalar_const(p, 0.0); |
| return p->zero; |
| } |
| |
| |
| static void program_error( struct texenv_fragment_program *p, const char *msg ) |
| { |
| _mesa_problem(NULL, msg); |
| p->error = 1; |
| } |
| |
| static struct ureg get_source( struct texenv_fragment_program *p, |
| GLuint src, GLuint unit ) |
| { |
| switch (src) { |
| case SRC_TEXTURE: |
| assert(!is_undef(p->src_texture[unit])); |
| return p->src_texture[unit]; |
| |
| case SRC_TEXTURE0: |
| case SRC_TEXTURE1: |
| case SRC_TEXTURE2: |
| case SRC_TEXTURE3: |
| case SRC_TEXTURE4: |
| case SRC_TEXTURE5: |
| case SRC_TEXTURE6: |
| case SRC_TEXTURE7: |
| assert(!is_undef(p->src_texture[src - SRC_TEXTURE0])); |
| return p->src_texture[src - SRC_TEXTURE0]; |
| |
| case SRC_CONSTANT: |
| return register_param2(p, STATE_TEXENV_COLOR, unit); |
| |
| case SRC_PRIMARY_COLOR: |
| return register_input(p, FRAG_ATTRIB_COL0); |
| |
| case SRC_PREVIOUS: |
| default: |
| if (is_undef(p->src_previous)) |
| return register_input(p, FRAG_ATTRIB_COL0); |
| else |
| return p->src_previous; |
| } |
| } |
| |
| static struct ureg emit_combine_source( struct texenv_fragment_program *p, |
| GLuint mask, |
| GLuint unit, |
| GLuint source, |
| GLuint operand ) |
| { |
| struct ureg arg, src, one; |
| |
| src = get_source(p, source, unit); |
| |
| switch (operand) { |
| case OPR_ONE_MINUS_SRC_COLOR: |
| /* Get unused tmp, |
| * Emit tmp = 1.0 - arg.xyzw |
| */ |
| arg = get_temp( p ); |
| one = get_one( p ); |
| return emit_arith( p, OPCODE_SUB, arg, mask, 0, one, src, undef); |
| |
| case OPR_SRC_ALPHA: |
| if (mask == WRITEMASK_W) |
| return src; |
| else |
| return swizzle1( src, SWIZZLE_W ); |
| case OPR_ONE_MINUS_SRC_ALPHA: |
| /* Get unused tmp, |
| * Emit tmp = 1.0 - arg.wwww |
| */ |
| arg = get_temp(p); |
| one = get_one(p); |
| return emit_arith(p, OPCODE_SUB, arg, mask, 0, |
| one, swizzle1(src, SWIZZLE_W), undef); |
| case OPR_ZERO: |
| return get_zero(p); |
| case OPR_ONE: |
| return get_one(p); |
| case OPR_SRC_COLOR: |
| default: |
| return src; |
| } |
| } |
| |
| static GLboolean args_match( struct state_key *key, GLuint unit ) |
| { |
| GLuint i, nr = key->unit[unit].NumArgsRGB; |
| |
| for (i = 0 ; i < nr ; i++) { |
| if (key->unit[unit].OptA[i].Source != key->unit[unit].OptRGB[i].Source) |
| return GL_FALSE; |
| |
| switch(key->unit[unit].OptA[i].Operand) { |
| case OPR_SRC_ALPHA: |
| switch(key->unit[unit].OptRGB[i].Operand) { |
| case OPR_SRC_COLOR: |
| case OPR_SRC_ALPHA: |
| break; |
| default: |
| return GL_FALSE; |
| } |
| break; |
| case OPR_ONE_MINUS_SRC_ALPHA: |
| switch(key->unit[unit].OptRGB[i].Operand) { |
| case OPR_ONE_MINUS_SRC_COLOR: |
| case OPR_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, |
| GLboolean saturate, |
| GLuint unit, |
| GLuint nr, |
| GLuint mode, |
| const struct mode_opt *opt) |
| { |
| struct ureg src[3]; |
| struct ureg tmp, half; |
| GLuint i; |
| |
| tmp = undef; /* silence warning (bug 5318) */ |
| |
| for (i = 0; i < nr; i++) |
| src[i] = emit_combine_source( p, mask, unit, opt[i].Source, opt[i].Operand ); |
| |
| switch (mode) { |
| case MODE_REPLACE: |
| if (mask == WRITEMASK_XYZW && !saturate) |
| return src[0]; |
| else |
| return emit_arith( p, OPCODE_MOV, dest, mask, saturate, src[0], undef, undef ); |
| case MODE_MODULATE: |
| return emit_arith( p, OPCODE_MUL, dest, mask, saturate, |
| src[0], src[1], undef ); |
| case MODE_ADD: |
| return emit_arith( p, OPCODE_ADD, dest, mask, saturate, |
| src[0], src[1], undef ); |
| case MODE_ADD_SIGNED: |
| /* tmp = arg0 + arg1 |
| * result = tmp - .5 |
| */ |
| half = get_half(p); |
| tmp = get_temp( p ); |
| emit_arith( p, OPCODE_ADD, tmp, mask, 0, src[0], src[1], undef ); |
| emit_arith( p, OPCODE_SUB, dest, mask, saturate, tmp, half, undef ); |
| return dest; |
| case MODE_INTERPOLATE: |
| /* Arg0 * (Arg2) + Arg1 * (1-Arg2) -- note arguments are reordered: |
| */ |
| return emit_arith( p, OPCODE_LRP, dest, mask, saturate, src[2], src[0], src[1] ); |
| |
| case MODE_SUBTRACT: |
| return emit_arith( p, OPCODE_SUB, dest, mask, saturate, src[0], src[1], undef ); |
| |
| case MODE_DOT3_RGBA: |
| case MODE_DOT3_RGBA_EXT: |
| case MODE_DOT3_RGB_EXT: |
| case MODE_DOT3_RGB: { |
| struct ureg tmp0 = get_temp( p ); |
| struct ureg tmp1 = get_temp( p ); |
| struct ureg neg1 = register_scalar_const(p, -1); |
| struct ureg two = register_scalar_const(p, 2); |
| |
| /* tmp0 = 2*src0 - 1 |
| * tmp1 = 2*src1 - 1 |
| * |
| * dst = tmp0 dot3 tmp1 |
| */ |
| emit_arith( p, OPCODE_MAD, tmp0, WRITEMASK_XYZW, 0, |
| two, src[0], neg1); |
| |
| if (_mesa_memcmp(&src[0], &src[1], sizeof(struct ureg)) == 0) |
| tmp1 = tmp0; |
| else |
| emit_arith( p, OPCODE_MAD, tmp1, WRITEMASK_XYZW, 0, |
| two, src[1], neg1); |
| emit_arith( p, OPCODE_DP3, dest, mask, saturate, tmp0, tmp1, undef); |
| return dest; |
| } |
| case MODE_MODULATE_ADD_ATI: |
| /* Arg0 * Arg2 + Arg1 */ |
| return emit_arith( p, OPCODE_MAD, dest, mask, saturate, |
| src[0], src[2], src[1] ); |
| case MODE_MODULATE_SIGNED_ADD_ATI: { |
| /* Arg0 * Arg2 + Arg1 - 0.5 */ |
| struct ureg tmp0 = get_temp(p); |
| half = get_half(p); |
| emit_arith( p, OPCODE_MAD, tmp0, mask, 0, src[0], src[2], src[1] ); |
| emit_arith( p, OPCODE_SUB, dest, mask, saturate, tmp0, half, undef ); |
| return dest; |
| } |
| case MODE_MODULATE_SUBTRACT_ATI: |
| /* Arg0 * Arg2 - Arg1 */ |
| emit_arith( p, OPCODE_MAD, dest, mask, 0, src[0], src[2], negate(src[1]) ); |
| return dest; |
| default: |
| return src[0]; |
| } |
| } |
| |
| |
| /** |
| * Generate instructions for one texture unit's env/combiner mode. |
| */ |
| static struct ureg |
| emit_texenv(struct texenv_fragment_program *p, GLuint unit) |
| { |
| struct state_key *key = p->state; |
| GLboolean saturate = (unit < p->last_tex_stage); |
| GLuint rgb_shift, alpha_shift; |
| struct ureg out, shift; |
| struct ureg dest; |
| |
| if (!key->unit[unit].enabled) { |
| return get_source(p, SRC_PREVIOUS, 0); |
| } |
| |
| switch (key->unit[unit].ModeRGB) { |
| case MODE_DOT3_RGB_EXT: |
| alpha_shift = key->unit[unit].ScaleShiftA; |
| rgb_shift = 0; |
| break; |
| case MODE_DOT3_RGBA_EXT: |
| alpha_shift = 0; |
| rgb_shift = 0; |
| break; |
| default: |
| rgb_shift = key->unit[unit].ScaleShiftRGB; |
| alpha_shift = key->unit[unit].ScaleShiftA; |
| break; |
| } |
| |
| /* If this is the very last calculation, emit direct to output reg: |
| */ |
| if (key->separate_specular || |
| unit != p->last_tex_stage || |
| alpha_shift || |
| rgb_shift) |
| dest = get_temp( p ); |
| else |
| dest = make_ureg(PROGRAM_OUTPUT, FRAG_RESULT_COLR); |
| |
| /* Emit the RGB and A combine ops |
| */ |
| if (key->unit[unit].ModeRGB == key->unit[unit].ModeA && |
| args_match(key, unit)) { |
| out = emit_combine( p, dest, WRITEMASK_XYZW, saturate, |
| unit, |
| key->unit[unit].NumArgsRGB, |
| key->unit[unit].ModeRGB, |
| key->unit[unit].OptRGB); |
| } |
| else if (key->unit[unit].ModeRGB == MODE_DOT3_RGBA_EXT || |
| key->unit[unit].ModeRGB == MODE_DOT3_RGBA) { |
| |
| out = emit_combine( p, dest, WRITEMASK_XYZW, saturate, |
| unit, |
| key->unit[unit].NumArgsRGB, |
| key->unit[unit].ModeRGB, |
| key->unit[unit].OptRGB); |
| } |
| else { |
| /* Need to do something to stop from re-emitting identical |
| * argument calculations here: |
| */ |
| out = emit_combine( p, dest, WRITEMASK_XYZ, saturate, |
| unit, |
| key->unit[unit].NumArgsRGB, |
| key->unit[unit].ModeRGB, |
| key->unit[unit].OptRGB); |
| out = emit_combine( p, dest, WRITEMASK_W, saturate, |
| unit, |
| key->unit[unit].NumArgsA, |
| key->unit[unit].ModeA, |
| key->unit[unit].OptA); |
| } |
| |
| /* Deal with the final shift: |
| */ |
| if (alpha_shift || rgb_shift) { |
| if (rgb_shift == alpha_shift) { |
| shift = register_scalar_const(p, 1<<rgb_shift); |
| } |
| else { |
| shift = register_const4f(p, |
| 1<<rgb_shift, |
| 1<<rgb_shift, |
| 1<<rgb_shift, |
| 1<<alpha_shift); |
| } |
| return emit_arith( p, OPCODE_MUL, dest, WRITEMASK_XYZW, |
| saturate, out, shift, undef ); |
| } |
| else |
| return out; |
| } |
| |
| |
| /** |
| * Generate instruction for getting a texture source term. |
| */ |
| static void load_texture( struct texenv_fragment_program *p, GLuint unit ) |
| { |
| if (is_undef(p->src_texture[unit])) { |
| GLuint dim = p->state->unit[unit].source_index; |
| struct ureg texcoord = register_input(p, FRAG_ATTRIB_TEX0+unit); |
| struct ureg tmp = get_tex_temp( p ); |
| |
| if (dim == TEXTURE_UNKNOWN_INDEX) |
| program_error(p, "TexSrcBit"); |
| |
| /* TODO: Use D0_MASK_XY where possible. |
| */ |
| if (p->state->unit[unit].enabled) { |
| p->src_texture[unit] = emit_texld( p, OPCODE_TXP, |
| tmp, WRITEMASK_XYZW, |
| unit, dim, texcoord ); |
| if (p->state->unit[unit].shadow) |
| p->program->Base.ShadowSamplers |= 1 << unit; |
| } else |
| p->src_texture[unit] = get_zero(p); |
| } |
| } |
| |
| static GLboolean load_texenv_source( struct texenv_fragment_program *p, |
| GLuint src, GLuint unit ) |
| { |
| switch (src) { |
| case SRC_TEXTURE: |
| load_texture(p, unit); |
| break; |
| |
| case SRC_TEXTURE0: |
| case SRC_TEXTURE1: |
| case SRC_TEXTURE2: |
| case SRC_TEXTURE3: |
| case SRC_TEXTURE4: |
| case SRC_TEXTURE5: |
| case SRC_TEXTURE6: |
| case SRC_TEXTURE7: |
| load_texture(p, src - SRC_TEXTURE0); |
| break; |
| |
| default: |
| break; |
| } |
| |
| return GL_TRUE; |
| } |
| |
| |
| /** |
| * Generate instructions for loading all texture source terms. |
| */ |
| static GLboolean |
| load_texunit_sources( struct texenv_fragment_program *p, int unit ) |
| { |
| struct state_key *key = p->state; |
| GLuint i; |
| |
| for (i = 0; i < key->unit[unit].NumArgsRGB; i++) { |
| load_texenv_source( p, key->unit[unit].OptRGB[i].Source, unit); |
| } |
| |
| for (i = 0; i < key->unit[unit].NumArgsA; i++) { |
| load_texenv_source( p, key->unit[unit].OptA[i].Source, unit ); |
| } |
| |
| return GL_TRUE; |
| } |
| |
| |
| /** |
| * Generate a new fragment program which implements the context's |
| * current texture env/combine mode. |
| */ |
| static void |
| create_new_program(GLcontext *ctx, struct state_key *key, |
| struct gl_fragment_program *program) |
| { |
| struct prog_instruction instBuffer[MAX_INSTRUCTIONS]; |
| struct texenv_fragment_program p; |
| GLuint unit; |
| struct ureg cf, out; |
| |
| _mesa_memset(&p, 0, sizeof(p)); |
| p.ctx = ctx; |
| p.state = key; |
| p.program = program; |
| |
| /* During code generation, use locally-allocated instruction buffer, |
| * then alloc dynamic storage below. |
| */ |
| p.program->Base.Instructions = instBuffer; |
| p.program->Base.Target = GL_FRAGMENT_PROGRAM_ARB; |
| p.program->Base.NumTexIndirections = 1; /* correct? */ |
| p.program->Base.NumTexInstructions = 0; |
| p.program->Base.NumAluInstructions = 0; |
| p.program->Base.String = NULL; |
| p.program->Base.NumInstructions = |
| p.program->Base.NumTemporaries = |
| p.program->Base.NumParameters = |
| p.program->Base.NumAttributes = p.program->Base.NumAddressRegs = 0; |
| p.program->Base.Parameters = _mesa_new_parameter_list(); |
| |
| p.program->Base.InputsRead = 0; |
| p.program->Base.OutputsWritten = 1 << FRAG_RESULT_COLR; |
| |
| for (unit = 0; unit < MAX_TEXTURE_UNITS; unit++) |
| p.src_texture[unit] = undef; |
| |
| p.src_previous = undef; |
| p.half = undef; |
| p.zero = undef; |
| p.one = undef; |
| |
| p.last_tex_stage = 0; |
| release_temps(&p); |
| |
| if (key->enabled_units) { |
| /* First pass - to support texture_env_crossbar, first identify |
| * all referenced texture sources and emit texld instructions |
| * for each: |
| */ |
| for (unit = 0 ; unit < ctx->Const.MaxTextureUnits ; unit++) |
| if (key->unit[unit].enabled) { |
| load_texunit_sources( &p, unit ); |
| p.last_tex_stage = unit; |
| } |
| |
| /* Second pass - emit combine instructions to build final color: |
| */ |
| for (unit = 0 ; unit < ctx->Const.MaxTextureUnits; unit++) |
| if (key->enabled_units & (1<<unit)) { |
| p.src_previous = emit_texenv( &p, unit ); |
| release_temps(&p); /* release all temps */ |
| } |
| } |
| |
| cf = get_source( &p, SRC_PREVIOUS, 0 ); |
| out = make_ureg( PROGRAM_OUTPUT, FRAG_RESULT_COLR ); |
| |
| if (key->separate_specular) { |
| /* Emit specular add. |
| */ |
| struct ureg s = register_input(&p, FRAG_ATTRIB_COL1); |
| emit_arith( &p, OPCODE_ADD, out, WRITEMASK_XYZ, 0, cf, s, undef ); |
| emit_arith( &p, OPCODE_MOV, out, WRITEMASK_W, 0, cf, undef, undef ); |
| } |
| else if (_mesa_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, OPCODE_MOV, out, WRITEMASK_XYZW, 0, cf, undef, undef ); |
| } |
| |
| /* Finish up: |
| */ |
| emit_arith( &p, OPCODE_END, undef, WRITEMASK_XYZW, 0, undef, undef, undef); |
| |
| if (key->fog_enabled) { |
| /* Pull fog mode from GLcontext, the value in the state key is |
| * a reduced value and not what is expected in FogOption |
| */ |
| p.program->FogOption = ctx->Fog.Mode; |
| } else |
| p.program->FogOption = GL_NONE; |
| |
| if (p.program->Base.NumTexIndirections > ctx->Const.FragmentProgram.MaxTexIndirections) |
| program_error(&p, "Exceeded max nr indirect texture lookups"); |
| |
| if (p.program->Base.NumTexInstructions > ctx->Const.FragmentProgram.MaxTexInstructions) |
| program_error(&p, "Exceeded max TEX instructions"); |
| |
| if (p.program->Base.NumAluInstructions > ctx->Const.FragmentProgram.MaxAluInstructions) |
| program_error(&p, "Exceeded max ALU instructions"); |
| |
| ASSERT(p.program->Base.NumInstructions <= MAX_INSTRUCTIONS); |
| |
| /* Allocate final instruction array */ |
| program->Base.Instructions |
| = _mesa_alloc_instructions(program->Base.NumInstructions); |
| if (!program->Base.Instructions) { |
| _mesa_error(ctx, GL_OUT_OF_MEMORY, |
| "generating tex env program"); |
| return; |
| } |
| _mesa_copy_instructions(program->Base.Instructions, instBuffer, |
| program->Base.NumInstructions); |
| |
| /* Notify driver the fragment program has (actually) changed. |
| */ |
| if (ctx->Driver.ProgramStringNotify) { |
| ctx->Driver.ProgramStringNotify( ctx, GL_FRAGMENT_PROGRAM_ARB, |
| &p.program->Base ); |
| } |
| |
| if (DISASSEM) { |
| _mesa_print_program(&p.program->Base); |
| _mesa_printf("\n"); |
| } |
| } |
| |
| |
| static struct gl_fragment_program * |
| search_cache(const struct texenvprog_cache *cache, |
| GLuint hash, |
| const void *key, |
| GLuint keysize) |
| { |
| struct texenvprog_cache_item *c; |
| |
| for (c = cache->items[hash % cache->size]; c; c = c->next) { |
| if (c->hash == hash && memcmp(c->key, key, keysize) == 0) |
| return c->data; |
| } |
| |
| return NULL; |
| } |
| |
| static void rehash( struct texenvprog_cache *cache ) |
| { |
| struct texenvprog_cache_item **items; |
| struct texenvprog_cache_item *c, *next; |
| GLuint size, i; |
| |
| size = cache->size * 3; |
| items = (struct texenvprog_cache_item**) _mesa_malloc(size * sizeof(*items)); |
| _mesa_memset(items, 0, size * sizeof(*items)); |
| |
| for (i = 0; i < cache->size; i++) |
| for (c = cache->items[i]; c; c = next) { |
| next = c->next; |
| c->next = items[c->hash % size]; |
| items[c->hash % size] = c; |
| } |
| |
| _mesa_free(cache->items); |
| cache->items = items; |
| cache->size = size; |
| } |
| |
| static void clear_cache(GLcontext *ctx, struct texenvprog_cache *cache) |
| { |
| struct texenvprog_cache_item *c, *next; |
| GLuint i; |
| |
| for (i = 0; i < cache->size; i++) { |
| for (c = cache->items[i]; c; c = next) { |
| next = c->next; |
| _mesa_free(c->key); |
| _mesa_reference_fragprog(ctx, &c->data, NULL); |
| _mesa_free(c); |
| } |
| cache->items[i] = NULL; |
| } |
| |
| |
| cache->n_items = 0; |
| } |
| |
| |
| static void cache_item( GLcontext *ctx, |
| struct texenvprog_cache *cache, |
| GLuint hash, |
| const struct state_key *key, |
| struct gl_fragment_program *prog) |
| { |
| struct texenvprog_cache_item *c = CALLOC_STRUCT(texenvprog_cache_item); |
| c->hash = hash; |
| |
| c->key = _mesa_malloc(sizeof(*key)); |
| memcpy(c->key, key, sizeof(*key)); |
| |
| c->data = prog; |
| |
| if (cache->n_items > cache->size * 1.5) { |
| if (cache->size < 1000) |
| rehash(cache); |
| else |
| clear_cache(ctx, cache); |
| } |
| |
| cache->n_items++; |
| c->next = cache->items[hash % cache->size]; |
| cache->items[hash % cache->size] = c; |
| } |
| |
| static GLuint hash_key( const struct state_key *key ) |
| { |
| GLuint *ikey = (GLuint *)key; |
| GLuint hash = 0, i; |
| |
| /* Make a slightly better attempt at a hash function: |
| */ |
| for (i = 0; i < sizeof(*key)/sizeof(*ikey); i++) |
| { |
| hash += ikey[i]; |
| hash += (hash << 10); |
| hash ^= (hash >> 6); |
| } |
| |
| return hash; |
| } |
| |
| |
| /** |
| * If _MaintainTexEnvProgram is set we'll generate a fragment program that |
| * implements the current texture env/combine mode. |
| * This function generates that program and puts it into effect. |
| */ |
| void |
| _mesa_UpdateTexEnvProgram( GLcontext *ctx ) |
| { |
| struct state_key key; |
| GLuint hash; |
| const struct gl_fragment_program *prev = ctx->FragmentProgram._Current; |
| |
| ASSERT(ctx->FragmentProgram._MaintainTexEnvProgram); |
| |
| /* If a conventional fragment program/shader isn't in effect... */ |
| if (!ctx->FragmentProgram._Enabled && |
| (!ctx->Shader.CurrentProgram || !ctx->Shader.CurrentProgram->FragmentProgram)) { |
| struct gl_fragment_program *newProg; |
| |
| make_state_key(ctx, &key); |
| hash = hash_key(&key); |
| |
| newProg = search_cache(&ctx->Texture.env_fp_cache, hash, &key, sizeof(key)); |
| |
| if (!newProg) { |
| /* create new tex env program */ |
| |
| if (0) |
| _mesa_printf("Building new texenv proggy for key %x\n", hash); |
| |
| newProg = (struct gl_fragment_program *) |
| ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0); |
| |
| create_new_program(ctx, &key, newProg); |
| |
| /* Our ownership of newProg is transferred to the cache */ |
| cache_item(ctx, &ctx->Texture.env_fp_cache, hash, &key, newProg); |
| } |
| |
| _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current, newProg); |
| _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._TexEnvProgram, newProg); |
| } |
| else { |
| /* _Current pointer has been updated in update_program */ |
| /* ctx->FragmentProgram._Current = ctx->FragmentProgram.Current; */ |
| } |
| |
| /* Tell the driver about the change. Could define a new target for |
| * this? |
| */ |
| if (ctx->FragmentProgram._Current != prev && ctx->Driver.BindProgram) { |
| ctx->Driver.BindProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, |
| (struct gl_program *) ctx->FragmentProgram._Current); |
| } |
| } |
| |
| |
| void _mesa_TexEnvProgramCacheInit( GLcontext *ctx ) |
| { |
| ctx->Texture.env_fp_cache.ctx = ctx; |
| ctx->Texture.env_fp_cache.size = 17; |
| ctx->Texture.env_fp_cache.n_items = 0; |
| ctx->Texture.env_fp_cache.items = (struct texenvprog_cache_item **) |
| _mesa_calloc(ctx->Texture.env_fp_cache.size * |
| sizeof(struct texenvprog_cache_item)); |
| } |
| |
| |
| void _mesa_TexEnvProgramCacheDestroy( GLcontext *ctx ) |
| { |
| clear_cache(ctx, &ctx->Texture.env_fp_cache); |
| _mesa_free(ctx->Texture.env_fp_cache.items); |
| } |