diff options
Diffstat (limited to 'src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c')
| -rw-r--r-- | src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c | 321 |
1 files changed, 321 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c b/src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c new file mode 100644 index 0000000000..b95cea26cf --- /dev/null +++ b/src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c @@ -0,0 +1,321 @@ +/* + * Copyright (C) 2010 Corbin Simpson + * + * 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, sublicense, 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 NONINFRINGEMENT. + * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) 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 "radeon_program_tex.h" + +#include "../r300_reg.h" + +/* Series of transformations to be done on textures. */ + +static struct rc_src_register shadow_ambient(struct radeon_compiler * c, int tmu) +{ + struct rc_src_register reg = { 0, }; + + reg.File = RC_FILE_CONSTANT; + reg.Index = rc_constants_add_state(&c->Program.Constants, RC_STATE_SHADOW_AMBIENT, tmu); + reg.Swizzle = RC_SWIZZLE_WWWW; + return reg; +} + +/** + * Transform TEX, TXP, TXB, and KIL instructions in the following ways: + * - implement texture compare (shadow extensions) + * - extract non-native source / destination operands + * - premultiply texture coordinates for RECT + * - extract operand swizzles + * - introduce a temporary register when write masks are needed + */ +int radeonTransformTEX( + struct radeon_compiler * c, + struct rc_instruction * inst, + void* data) +{ + struct r300_fragment_program_compiler *compiler = + (struct r300_fragment_program_compiler*)data; + + if (inst->U.I.Opcode != RC_OPCODE_TEX && + inst->U.I.Opcode != RC_OPCODE_TXB && + inst->U.I.Opcode != RC_OPCODE_TXP && + inst->U.I.Opcode != RC_OPCODE_KIL) + return 0; + + /* ARB_shadow & EXT_shadow_funcs */ + if (inst->U.I.Opcode != RC_OPCODE_KIL && + c->Program.ShadowSamplers & (1 << inst->U.I.TexSrcUnit)) { + rc_compare_func comparefunc = compiler->state.unit[inst->U.I.TexSrcUnit].texture_compare_func; + + if (comparefunc == RC_COMPARE_FUNC_NEVER || comparefunc == RC_COMPARE_FUNC_ALWAYS) { + inst->U.I.Opcode = RC_OPCODE_MOV; + + if (comparefunc == RC_COMPARE_FUNC_ALWAYS) { + inst->U.I.SrcReg[0].File = RC_FILE_NONE; + inst->U.I.SrcReg[0].Swizzle = RC_SWIZZLE_1111; + } else { + inst->U.I.SrcReg[0] = shadow_ambient(c, inst->U.I.TexSrcUnit); + } + + return 1; + } else { + rc_compare_func comparefunc = compiler->state.unit[inst->U.I.TexSrcUnit].texture_compare_func; + unsigned int depthmode = compiler->state.unit[inst->U.I.TexSrcUnit].depth_texture_mode; + struct rc_instruction * inst_rcp = rc_insert_new_instruction(c, inst); + struct rc_instruction * inst_mad = rc_insert_new_instruction(c, inst_rcp); + struct rc_instruction * inst_cmp = rc_insert_new_instruction(c, inst_mad); + int pass, fail; + + inst_rcp->U.I.Opcode = RC_OPCODE_RCP; + inst_rcp->U.I.DstReg.File = RC_FILE_TEMPORARY; + inst_rcp->U.I.DstReg.Index = rc_find_free_temporary(c); + inst_rcp->U.I.DstReg.WriteMask = RC_MASK_W; + inst_rcp->U.I.SrcReg[0] = inst->U.I.SrcReg[0]; + inst_rcp->U.I.SrcReg[0].Swizzle = RC_SWIZZLE_WWWW; + + inst_cmp->U.I.DstReg = inst->U.I.DstReg; + inst->U.I.DstReg.File = RC_FILE_TEMPORARY; + inst->U.I.DstReg.Index = rc_find_free_temporary(c); + inst->U.I.DstReg.WriteMask = RC_MASK_XYZW; + + inst_mad->U.I.Opcode = RC_OPCODE_MAD; + inst_mad->U.I.DstReg.File = RC_FILE_TEMPORARY; + inst_mad->U.I.DstReg.Index = rc_find_free_temporary(c); + inst_mad->U.I.SrcReg[0] = inst->U.I.SrcReg[0]; + inst_mad->U.I.SrcReg[0].Swizzle = RC_SWIZZLE_ZZZZ; + inst_mad->U.I.SrcReg[1].File = RC_FILE_TEMPORARY; + inst_mad->U.I.SrcReg[1].Index = inst_rcp->U.I.DstReg.Index; + inst_mad->U.I.SrcReg[1].Swizzle = RC_SWIZZLE_WWWW; + inst_mad->U.I.SrcReg[2].File = RC_FILE_TEMPORARY; + inst_mad->U.I.SrcReg[2].Index = inst->U.I.DstReg.Index; + if (depthmode == 0) /* GL_LUMINANCE */ + inst_mad->U.I.SrcReg[2].Swizzle = RC_MAKE_SWIZZLE(RC_SWIZZLE_X, RC_SWIZZLE_Y, RC_SWIZZLE_Z, RC_SWIZZLE_Z); + else if (depthmode == 2) /* GL_ALPHA */ + inst_mad->U.I.SrcReg[2].Swizzle = RC_SWIZZLE_WWWW; + + /* Recall that SrcReg[0] is tex, SrcReg[2] is r and: + * r < tex <=> -tex+r < 0 + * r >= tex <=> not (-tex+r < 0 */ + if (comparefunc == RC_COMPARE_FUNC_LESS || comparefunc == RC_COMPARE_FUNC_GEQUAL) + inst_mad->U.I.SrcReg[2].Negate = inst_mad->U.I.SrcReg[2].Negate ^ RC_MASK_XYZW; + else + inst_mad->U.I.SrcReg[0].Negate = inst_mad->U.I.SrcReg[0].Negate ^ RC_MASK_XYZW; + + inst_cmp->U.I.Opcode = RC_OPCODE_CMP; + /* DstReg has been filled out above */ + inst_cmp->U.I.SrcReg[0].File = RC_FILE_TEMPORARY; + inst_cmp->U.I.SrcReg[0].Index = inst_mad->U.I.DstReg.Index; + + if (comparefunc == RC_COMPARE_FUNC_LESS || comparefunc == RC_COMPARE_FUNC_GREATER) { + pass = 1; + fail = 2; + } else { + pass = 2; + fail = 1; + } + + inst_cmp->U.I.SrcReg[pass].File = RC_FILE_NONE; + inst_cmp->U.I.SrcReg[pass].Swizzle = RC_SWIZZLE_1111; + inst_cmp->U.I.SrcReg[fail] = shadow_ambient(c, inst->U.I.TexSrcUnit); + } + } + + /* Texture wrap modes don't work on NPOT textures or texrects. + * + * The game plan is simple. We have two flags, fake_npot and + * non_normalized_coords, as well as a tex target. The RECT tex target + * will make the emitted code use non-scaled texcoords. + * + * Non-wrapped/clamped texcoords with NPOT are free in HW. Repeat and + * mirroring are not. If we need to repeat, we do: + * + * MUL temp, texcoord, <scaling factor constant> + * FRC temp, temp ; Discard integer portion of coords + * + * This gives us coords in [0, 1]. + * + * Mirroring is trickier. We're going to start out like repeat: + * + * MUL temp0, texcoord, <scaling factor constant> ; De-mirror across axes + * MUL temp0, abs(temp0), 0.5 ; Pattern repeats in [0, 2] + * ; so scale to [0, 1] + * FRC temp0, temp0 ; Make the pattern repeat + * SGE temp1, temp0, 0.5 ; Select components that need to be "reflected" + * ; across the mirror + * MAD temp0, neg(0.5), temp1, temp0 ; Add -0.5 to the + * ; selected components + * ADD temp0, temp0, temp0 ; Poor man's 2x to undo earlier MUL + * + * This gives us coords in [0, 1]. + * + * ~ C. + */ + if (inst->U.I.Opcode != RC_OPCODE_KIL && + (inst->U.I.TexSrcTarget == RC_TEXTURE_RECT || + compiler->state.unit[inst->U.I.TexSrcUnit].fake_npot || + compiler->state.unit[inst->U.I.TexSrcUnit].non_normalized_coords)) { + rc_wrap_mode wrapmode = compiler->state.unit[inst->U.I.TexSrcUnit].wrap_mode; + struct rc_instruction *inst_rect = NULL; + unsigned temp = rc_find_free_temporary(c); + + if (inst->U.I.TexSrcTarget == RC_TEXTURE_RECT || + compiler->state.unit[inst->U.I.TexSrcUnit].non_normalized_coords) { + inst_rect = rc_insert_new_instruction(c, inst->Prev); + + inst_rect->U.I.Opcode = RC_OPCODE_MUL; + inst_rect->U.I.DstReg.File = RC_FILE_TEMPORARY; + inst_rect->U.I.DstReg.Index = temp; + inst_rect->U.I.SrcReg[0] = inst->U.I.SrcReg[0]; + inst_rect->U.I.SrcReg[1].File = RC_FILE_CONSTANT; + inst_rect->U.I.SrcReg[1].Index = + rc_constants_add_state(&c->Program.Constants, + RC_STATE_R300_TEXRECT_FACTOR, inst->U.I.TexSrcUnit); + + reset_srcreg(&inst->U.I.SrcReg[0]); + inst->U.I.SrcReg[0].File = RC_FILE_TEMPORARY; + inst->U.I.SrcReg[0].Index = temp; + + inst->U.I.TexSrcTarget = RC_TEXTURE_2D; + } + + if (compiler->state.unit[inst->U.I.TexSrcUnit].fake_npot && + wrapmode != RC_WRAP_NONE) { + if (wrapmode == RC_WRAP_REPEAT) { + /* Both instructions will be paired up. */ + struct rc_instruction *inst_frc = rc_insert_new_instruction(c, inst->Prev); + struct rc_instruction *inst_mov = rc_insert_new_instruction(c, inst_frc); + + inst_frc->U.I.Opcode = RC_OPCODE_FRC; + inst_frc->U.I.DstReg.File = RC_FILE_TEMPORARY; + inst_frc->U.I.DstReg.Index = temp; + inst_frc->U.I.DstReg.WriteMask = RC_MASK_XYZ; + inst_frc->U.I.SrcReg[0] = inst->U.I.SrcReg[0]; + + /* Preserve W for TXP. */ + inst_mov->U.I.Opcode = RC_OPCODE_MOV; + inst_mov->U.I.DstReg.File = RC_FILE_TEMPORARY; + inst_mov->U.I.DstReg.Index = temp; + inst_mov->U.I.DstReg.WriteMask = RC_MASK_W; + inst_mov->U.I.SrcReg[0] = inst->U.I.SrcReg[0]; + + reset_srcreg(&inst->U.I.SrcReg[0]); + inst->U.I.SrcReg[0].File = RC_FILE_TEMPORARY; + inst->U.I.SrcReg[0].Index = temp; + } else if (wrapmode == RC_WRAP_MIRROR) { + unsigned temp1; + /* + * MUL temp0, abs(temp0), 0.5 + * FRC temp0, temp0 + * SGE temp1, temp0, 0.5 + * MAD temp0, neg(0.5), temp1, temp0 + * ADD temp0, temp0, temp0 + */ + + inst_rect = rc_insert_new_instruction(c, inst->Prev); + + inst_rect->U.I.Opcode = RC_OPCODE_MUL; + inst_rect->U.I.DstReg.File = RC_FILE_TEMPORARY; + inst_rect->U.I.DstReg.Index = temp; + inst_rect->U.I.SrcReg[0] = inst->U.I.SrcReg[0]; + inst_rect->U.I.SrcReg[1].Swizzle = RC_MAKE_SWIZZLE_SMEAR(RC_SWIZZLE_HALF); + + inst_rect = rc_insert_new_instruction(c, inst->Prev); + + inst_rect->U.I.Opcode = RC_OPCODE_FRC; + inst_rect->U.I.DstReg.File = RC_FILE_TEMPORARY; + inst_rect->U.I.DstReg.Index = temp; + inst_rect->U.I.SrcReg[0].File = RC_FILE_TEMPORARY; + inst_rect->U.I.SrcReg[0].Index = temp; + + temp1 = rc_find_free_temporary(c); + inst_rect = rc_insert_new_instruction(c, inst->Prev); + + inst_rect->U.I.Opcode = RC_OPCODE_SGE; + inst_rect->U.I.DstReg.File = RC_FILE_TEMPORARY; + inst_rect->U.I.DstReg.Index = temp1; + inst_rect->U.I.SrcReg[0].File = RC_FILE_TEMPORARY; + inst_rect->U.I.SrcReg[0].Index = temp; + inst_rect->U.I.SrcReg[1].Swizzle = RC_MAKE_SWIZZLE_SMEAR(RC_SWIZZLE_HALF); + + inst_rect = rc_insert_new_instruction(c, inst->Prev); + + inst_rect->U.I.Opcode = RC_OPCODE_MAD; + inst_rect->U.I.DstReg.File = RC_FILE_TEMPORARY; + inst_rect->U.I.DstReg.Index = temp; + inst_rect->U.I.SrcReg[0].File = RC_FILE_TEMPORARY; + inst_rect->U.I.SrcReg[0].Index = temp1; + inst_rect->U.I.SrcReg[1].Swizzle = RC_MAKE_SWIZZLE_SMEAR(RC_SWIZZLE_HALF); + inst_rect->U.I.SrcReg[1].Negate = 1; + inst_rect->U.I.SrcReg[2].File = RC_FILE_TEMPORARY; + inst_rect->U.I.SrcReg[2].Index = temp; + + inst_rect = rc_insert_new_instruction(c, inst->Prev); + + inst_rect->U.I.Opcode = RC_OPCODE_ADD; + inst_rect->U.I.DstReg.File = RC_FILE_TEMPORARY; + inst_rect->U.I.DstReg.Index = temp; + inst_rect->U.I.SrcReg[0].File = RC_FILE_TEMPORARY; + inst_rect->U.I.SrcReg[0].Index = temp; + inst_rect->U.I.SrcReg[1].File = RC_FILE_TEMPORARY; + inst_rect->U.I.SrcReg[1].Index = temp; + + reset_srcreg(&inst->U.I.SrcReg[0]); + inst->U.I.SrcReg[0].File = RC_FILE_TEMPORARY; + inst->U.I.SrcReg[0].Index = temp; + } + } + } + + /* Cannot write texture to output registers or with masks */ + if (inst->U.I.Opcode != RC_OPCODE_KIL && + (inst->U.I.DstReg.File != RC_FILE_TEMPORARY || inst->U.I.DstReg.WriteMask != RC_MASK_XYZW)) { + struct rc_instruction * inst_mov = rc_insert_new_instruction(c, inst); + + inst_mov->U.I.Opcode = RC_OPCODE_MOV; + inst_mov->U.I.DstReg = inst->U.I.DstReg; + inst_mov->U.I.SrcReg[0].File = RC_FILE_TEMPORARY; + inst_mov->U.I.SrcReg[0].Index = rc_find_free_temporary(c); + + inst->U.I.DstReg.File = RC_FILE_TEMPORARY; + inst->U.I.DstReg.Index = inst_mov->U.I.SrcReg[0].Index; + inst->U.I.DstReg.WriteMask = RC_MASK_XYZW; + } + + + /* Cannot read texture coordinate from constants file */ + if (inst->U.I.SrcReg[0].File != RC_FILE_TEMPORARY && inst->U.I.SrcReg[0].File != RC_FILE_INPUT) { + struct rc_instruction * inst_mov = rc_insert_new_instruction(c, inst->Prev); + + inst_mov->U.I.Opcode = RC_OPCODE_MOV; + inst_mov->U.I.DstReg.File = RC_FILE_TEMPORARY; + inst_mov->U.I.DstReg.Index = rc_find_free_temporary(c); + inst_mov->U.I.SrcReg[0] = inst->U.I.SrcReg[0]; + + reset_srcreg(&inst->U.I.SrcReg[0]); + inst->U.I.SrcReg[0].File = RC_FILE_TEMPORARY; + inst->U.I.SrcReg[0].Index = inst_mov->U.I.DstReg.Index; + } + + return 1; +} |