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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.c360
1 files changed, 360 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 00000000000..b4ba0b3f870
--- /dev/null
+++ b/src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c
@@ -0,0 +1,360 @@
+/*
+ * 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"
+
+/* Series of transformations to be done on textures. */
+
+static struct rc_src_register shadow_ambient(struct r300_fragment_program_compiler *compiler,
+ int tmu)
+{
+ struct rc_src_register reg = { 0, };
+
+ if (compiler->enable_shadow_ambient) {
+ reg.File = RC_FILE_CONSTANT;
+ reg.Index = rc_constants_add_state(&compiler->Base.Program.Constants,
+ RC_STATE_SHADOW_AMBIENT, tmu);
+ reg.Swizzle = RC_SWIZZLE_WWWW;
+ } else {
+ reg.File = RC_FILE_NONE;
+ reg.Swizzle = RC_SWIZZLE_0000;
+ }
+ return reg;
+}
+
+static void lower_texture_rect(struct r300_fragment_program_compiler *compiler,
+ struct rc_instruction *inst)
+{
+ struct rc_instruction *inst_rect;
+ unsigned temp = rc_find_free_temporary(&compiler->Base);
+
+ if (inst->U.I.TexSrcTarget == RC_TEXTURE_RECT ||
+ compiler->state.unit[inst->U.I.TexSrcUnit].non_normalized_coords) {
+ inst_rect = rc_insert_new_instruction(&compiler->Base, 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(&compiler->Base.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;
+ }
+}
+
+/**
+ * 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(compiler, 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(compiler, 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 temp, texcoord, <scaling factor constant> ; De-mirror across axes
+ * MUL temp, temp, 0.5 ; Pattern repeats in [0, 2]
+ * ; so scale to [0, 1]
+ * FRC temp, temp ; Make the pattern repeat
+ * MAD temp, temp, 2, -1 ; Move the pattern to [-1, 1]
+ * ADD temp, 1, -abs(temp) ; Now comes a neat trick: use abs to mirror the pattern.
+ * ; The pattern is backwards, so reverse it (1-x).
+ *
+ * This gives us coords in [0, 1].
+ *
+ * ~ C & M. ;)
+ */
+ 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;
+
+ /* R300 cannot sample from rectangles. */
+ if (!compiler->is_r500) {
+ lower_texture_rect(compiler, inst);
+ }
+
+ if (compiler->state.unit[inst->U.I.TexSrcUnit].fake_npot &&
+ wrapmode != RC_WRAP_NONE) {
+ struct rc_instruction *inst_mov;
+ unsigned temp = rc_find_free_temporary(c);
+
+ /* For NPOT fallback, we need normalized coordinates anyway. */
+ if (compiler->is_r500) {
+ lower_texture_rect(compiler, inst);
+ }
+
+ if (wrapmode == RC_WRAP_REPEAT) {
+ /* Both instructions will be paired up. */
+ struct rc_instruction *inst_frc = rc_insert_new_instruction(c, inst->Prev);
+
+ 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];
+ } else if (wrapmode == RC_WRAP_MIRRORED_REPEAT) {
+ /*
+ * Function:
+ * f(v) = 1 - abs(frac(v * 0.5) * 2 - 1)
+ *
+ * Code:
+ * MUL temp, src0, 0.5
+ * FRC temp, temp
+ * MAD temp, temp, 2, -1
+ * ADD temp, 1, -abs(temp)
+ */
+
+ struct rc_instruction *inst_mul, *inst_frc, *inst_mad, *inst_add;
+ unsigned two, two_swizzle;
+
+ inst_mul = rc_insert_new_instruction(c, inst->Prev);
+
+ inst_mul->U.I.Opcode = RC_OPCODE_MUL;
+ inst_mul->U.I.DstReg.File = RC_FILE_TEMPORARY;
+ inst_mul->U.I.DstReg.Index = temp;
+ inst_mul->U.I.DstReg.WriteMask = RC_MASK_XYZ;
+ inst_mul->U.I.SrcReg[0] = inst->U.I.SrcReg[0];
+ inst_mul->U.I.SrcReg[1].Swizzle = RC_SWIZZLE_HHHH;
+
+ inst_frc = rc_insert_new_instruction(c, inst->Prev);
+
+ 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].File = RC_FILE_TEMPORARY;
+ inst_frc->U.I.SrcReg[0].Index = temp;
+ inst_frc->U.I.SrcReg[0].Swizzle = RC_SWIZZLE_XYZ0;
+
+ two = rc_constants_add_immediate_scalar(&c->Program.Constants, 2, &two_swizzle);
+ inst_mad = rc_insert_new_instruction(c, inst->Prev);
+
+ inst_mad->U.I.Opcode = RC_OPCODE_MAD;
+ inst_mad->U.I.DstReg.File = RC_FILE_TEMPORARY;
+ inst_mad->U.I.DstReg.Index = temp;
+ inst_mad->U.I.DstReg.WriteMask = RC_MASK_XYZ;
+ inst_mad->U.I.SrcReg[0].File = RC_FILE_TEMPORARY;
+ inst_mad->U.I.SrcReg[0].Index = temp;
+ inst_mad->U.I.SrcReg[0].Swizzle = RC_SWIZZLE_XYZ0;
+ inst_mad->U.I.SrcReg[1].File = RC_FILE_CONSTANT;
+ inst_mad->U.I.SrcReg[1].Index = two;
+ inst_mad->U.I.SrcReg[1].Swizzle = two_swizzle;
+ inst_mad->U.I.SrcReg[2].Swizzle = RC_SWIZZLE_1111;
+ inst_mad->U.I.SrcReg[2].Negate = RC_MASK_XYZ;
+
+ inst_add = rc_insert_new_instruction(c, inst->Prev);
+
+ inst_add->U.I.Opcode = RC_OPCODE_ADD;
+ inst_add->U.I.DstReg.File = RC_FILE_TEMPORARY;
+ inst_add->U.I.DstReg.Index = temp;
+ inst_add->U.I.DstReg.WriteMask = RC_MASK_XYZ;
+ inst_add->U.I.SrcReg[0].Swizzle = RC_SWIZZLE_1111;
+ inst_add->U.I.SrcReg[1].File = RC_FILE_TEMPORARY;
+ inst_add->U.I.SrcReg[1].Index = temp;
+ inst_add->U.I.SrcReg[1].Swizzle = RC_SWIZZLE_XYZ0;
+ inst_add->U.I.SrcReg[1].Abs = 1;
+ inst_add->U.I.SrcReg[1].Negate = RC_MASK_XYZ;
+ } else if (wrapmode == RC_WRAP_MIRRORED_CLAMP) {
+ /*
+ * Mirrored clamp modes are bloody simple, we just use abs
+ * to mirror [0, 1] into [-1, 0]. This works for
+ * all modes i.e. CLAMP, CLAMP_TO_EDGE, and CLAMP_TO_BORDER.
+ */
+ struct rc_instruction *inst_mov;
+
+ 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 = temp;
+ inst_mov->U.I.DstReg.WriteMask = RC_MASK_XYZ;
+ inst_mov->U.I.SrcReg[0] = inst->U.I.SrcReg[0];
+ inst_mov->U.I.SrcReg[0].Abs = 1;
+ }
+
+ /* Preserve W for TXP/TXB. */
+ 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 = 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;
+ }
+ }
+
+ /* Cannot write texture to output registers (all chips) or with masks (non-r500) */
+ if (inst->U.I.Opcode != RC_OPCODE_KIL &&
+ (inst->U.I.DstReg.File != RC_FILE_TEMPORARY ||
+ (!compiler->is_r500 && 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;
+}
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