--- /dev/null
+/*
+ * Copyright 2014 VMware, Inc.
+ * 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 THE AUTHORS 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.
+ */
+
+
+/**
+ * This utility transforms the geometry shader to emulate point sprite by
+ * drawing a quad. It also adds an extra output for the original point position
+ * if the point position is to be written to a stream output buffer.
+ * Note: It assumes the driver will add a constant for the inverse viewport
+ * after the user defined constants.
+ */
+
+#include "util/u_debug.h"
+#include "util/u_math.h"
+#include "tgsi_info.h"
+#include "tgsi_point_sprite.h"
+#include "tgsi_transform.h"
+#include "pipe/p_state.h"
+
+#define INVALID_INDEX 9999
+
+/* Set swizzle based on the immediates (0, 1, 0, -1) */
+static inline unsigned
+set_swizzle(int x, int y, int z, int w)
+{
+ static const unsigned map[3] = {TGSI_SWIZZLE_W, TGSI_SWIZZLE_X,
+ TGSI_SWIZZLE_Y};
+ assert(x >= -1);
+ assert(x <= 1);
+ assert(y >= -1);
+ assert(y <= 1);
+ assert(z >= -1);
+ assert(z <= 1);
+ assert(w >= -1);
+ assert(w <= 1);
+
+ return map[x+1] | (map[y+1] << 2) | (map[z+1] << 4) | (map[w+1] << 6);
+}
+
+static inline unsigned
+get_swizzle(unsigned swizzle, unsigned component)
+{
+ assert(component < 4);
+ return (swizzle >> (component * 2)) & 0x3;
+}
+
+struct psprite_transform_context
+{
+ struct tgsi_transform_context base;
+ unsigned num_tmp;
+ unsigned num_out;
+ unsigned num_orig_out;
+ unsigned num_const;
+ unsigned num_imm;
+ unsigned point_size_in; // point size input
+ unsigned point_size_out; // point size output
+ unsigned point_size_tmp; // point size temp
+ unsigned point_pos_in; // point pos input
+ unsigned point_pos_out; // point pos output
+ unsigned point_pos_sout; // original point pos for streamout
+ unsigned point_pos_tmp; // point pos temp
+ unsigned point_scale_tmp; // point scale temp
+ unsigned point_color_out; // point color output
+ unsigned point_color_tmp; // point color temp
+ unsigned point_imm; // point immediates
+ unsigned point_ivp; // point inverseViewport constant
+ unsigned point_dir_swz[4]; // point direction swizzle
+ unsigned point_coord_swz[4]; // point coord swizzle
+ unsigned point_coord_enable; // point coord enable mask
+ unsigned point_coord_decl; // point coord output declared mask
+ unsigned point_coord_out; // point coord output starting index
+ unsigned point_coord_aa; // aa point coord semantic index
+ unsigned point_coord_k; // aa point coord threshold distance
+ unsigned stream_out_point_pos:1; // set if to stream out original point pos
+ unsigned aa_point:1; // set if doing aa point
+ unsigned out_tmp_index[PIPE_MAX_SHADER_OUTPUTS];
+ int max_generic;
+};
+
+static inline struct psprite_transform_context *
+psprite_transform_context(struct tgsi_transform_context *ctx)
+{
+ return (struct psprite_transform_context *) ctx;
+}
+
+
+/**
+ * TGSI declaration transform callback.
+ */
+static void
+psprite_decl(struct tgsi_transform_context *ctx,
+ struct tgsi_full_declaration *decl)
+{
+ struct psprite_transform_context *ts = psprite_transform_context(ctx);
+
+ if (decl->Declaration.File == TGSI_FILE_INPUT) {
+ if (decl->Semantic.Name == TGSI_SEMANTIC_PSIZE) {
+ ts->point_size_in = decl->Range.First;
+ }
+ else if (decl->Semantic.Name == TGSI_SEMANTIC_POSITION) {
+ ts->point_pos_in = decl->Range.First;
+ }
+ }
+ else if (decl->Declaration.File == TGSI_FILE_OUTPUT) {
+ if (decl->Semantic.Name == TGSI_SEMANTIC_PSIZE) {
+ ts->point_size_out = decl->Range.First;
+ }
+ else if (decl->Semantic.Name == TGSI_SEMANTIC_POSITION) {
+ ts->point_pos_out = decl->Range.First;
+ }
+ else if (decl->Semantic.Name == TGSI_SEMANTIC_GENERIC &&
+ decl->Semantic.Index < 32) {
+ ts->point_coord_decl |= 1 << decl->Semantic.Index;
+ ts->max_generic = MAX2(ts->max_generic, decl->Semantic.Index);
+ }
+ ts->num_out = MAX2(ts->num_out, decl->Range.Last + 1);
+ }
+ else if (decl->Declaration.File == TGSI_FILE_TEMPORARY) {
+ ts->num_tmp = MAX2(ts->num_tmp, decl->Range.Last + 1);
+ }
+ else if (decl->Declaration.File == TGSI_FILE_CONSTANT) {
+ ts->num_const = MAX2(ts->num_const, decl->Range.Last + 1);
+ }
+
+ ctx->emit_declaration(ctx, decl);
+}
+
+/**
+ * TGSI immediate declaration transform callback.
+ */
+static void
+psprite_immediate(struct tgsi_transform_context *ctx,
+ struct tgsi_full_immediate *imm)
+{
+ struct psprite_transform_context *ts = psprite_transform_context(ctx);
+
+ ctx->emit_immediate(ctx, imm);
+ ts->num_imm++;
+}
+
+
+/**
+ * TGSI transform prolog callback.
+ */
+static void
+psprite_prolog(struct tgsi_transform_context *ctx)
+{
+ struct psprite_transform_context *ts = psprite_transform_context(ctx);
+ unsigned point_coord_enable, en;
+ int i;
+
+ /* Replace output registers with temporary registers */
+ for (i = 0; i < ts->num_out; i++) {
+ ts->out_tmp_index[i] = ts->num_tmp++;
+ }
+ ts->num_orig_out = ts->num_out;
+
+ /* Declare a tmp register for point scale */
+ ts->point_scale_tmp = ts->num_tmp++;
+
+ if (ts->point_size_out != INVALID_INDEX)
+ ts->point_size_tmp = ts->out_tmp_index[ts->point_size_out];
+ else
+ ts->point_size_tmp = ts->num_tmp++;
+
+ assert(ts->point_pos_out != INVALID_INDEX);
+ ts->point_pos_tmp = ts->out_tmp_index[ts->point_pos_out];
+ ts->out_tmp_index[ts->point_pos_out] = INVALID_INDEX;
+
+ /* Declare one more tmp register for point coord threshold distance
+ * if we are generating anti-aliased point.
+ */
+ if (ts->aa_point)
+ ts->point_coord_k = ts->num_tmp++;
+
+ tgsi_transform_temps_decl(ctx, ts->point_size_tmp, ts->num_tmp-1);
+
+ /* Declare an extra output for the original point position for stream out */
+ if (ts->stream_out_point_pos) {
+ ts->point_pos_sout = ts->num_out++;
+ tgsi_transform_output_decl(ctx, ts->point_pos_sout,
+ TGSI_SEMANTIC_GENERIC, 0, 0);
+ }
+
+ /* point coord outputs to be declared */
+ point_coord_enable = ts->point_coord_enable & ~ts->point_coord_decl;
+
+ /* Declare outputs for those point coord that are enabled but are not
+ * already declared in this shader.
+ */
+ ts->point_coord_out = ts->num_out;
+ if (point_coord_enable) {
+ for (i = 0, en = point_coord_enable; en; en>>=1, i++) {
+ if (en & 0x1) {
+ tgsi_transform_output_decl(ctx, ts->num_out++,
+ TGSI_SEMANTIC_GENERIC, i, 0);
+ ts->max_generic = MAX2(ts->max_generic, i);
+ }
+ }
+ }
+
+ /* add an extra generic output for aa point texcoord */
+ if (ts->aa_point) {
+ ts->point_coord_aa = ts->max_generic + 1;
+ assert((ts->point_coord_enable & (1 << ts->point_coord_aa)) == 0);
+ ts->point_coord_enable |= 1 << (ts->point_coord_aa);
+ tgsi_transform_output_decl(ctx, ts->num_out++, TGSI_SEMANTIC_GENERIC,
+ ts->point_coord_aa, 0);
+ }
+
+ /* Declare extra immediates */
+ ts->point_imm = ts->num_imm;
+ tgsi_transform_immediate_decl(ctx, 0, 1, 0.5, -1);
+
+ /* Declare point constant -
+ * constant.xy -- inverseViewport
+ * constant.z -- current point size
+ * constant.w -- max point size
+ * The driver needs to add this constant to the constant buffer
+ */
+ ts->point_ivp = ts->num_const++;
+ tgsi_transform_const_decl(ctx, ts->point_ivp, ts->point_ivp);
+
+ /* If this geometry shader does not specify point size,
+ * get the current point size from the point constant.
+ */
+ if (ts->point_size_out == INVALID_INDEX) {
+ struct tgsi_full_instruction inst;
+
+ inst = tgsi_default_full_instruction();
+ inst.Instruction.Opcode = TGSI_OPCODE_MOV;
+ inst.Instruction.NumDstRegs = 1;
+ tgsi_transform_dst_reg(&inst.Dst[0], TGSI_FILE_TEMPORARY,
+ ts->point_size_tmp, TGSI_WRITEMASK_XYZW);
+ inst.Instruction.NumSrcRegs = 1;
+ tgsi_transform_src_reg(&inst.Src[0], TGSI_FILE_CONSTANT,
+ ts->point_ivp, TGSI_SWIZZLE_Z,
+ TGSI_SWIZZLE_Z, TGSI_SWIZZLE_Z, TGSI_SWIZZLE_Z);
+ ctx->emit_instruction(ctx, &inst);
+ }
+}
+
+
+/**
+ * Add the point sprite emulation instructions at the emit vertex instruction
+ */
+static void
+psprite_emit_vertex_inst(struct tgsi_transform_context *ctx,
+ struct tgsi_full_instruction *vert_inst)
+{
+ struct psprite_transform_context *ts = psprite_transform_context(ctx);
+ struct tgsi_full_instruction inst;
+ unsigned point_coord_enable, en;
+ unsigned i, j, s;
+
+ /* new point coord outputs */
+ point_coord_enable = ts->point_coord_enable & ~ts->point_coord_decl;
+
+ /* OUTPUT[pos_sout] = TEMP[pos] */
+ if (ts->point_pos_sout != INVALID_INDEX) {
+ tgsi_transform_op1_inst(ctx, TGSI_OPCODE_MOV,
+ TGSI_FILE_OUTPUT, ts->point_pos_sout,
+ TGSI_WRITEMASK_XYZW,
+ TGSI_FILE_TEMPORARY, ts->point_pos_tmp);
+ }
+
+ /**
+ * Set up the point scale vector
+ * scale = pointSize * pos.w * inverseViewport
+ */
+
+ /* MUL point_scale.x, point_size.x, point_pos.w */
+ tgsi_transform_op2_swz_inst(ctx, TGSI_OPCODE_MUL,
+ TGSI_FILE_TEMPORARY, ts->point_scale_tmp, TGSI_WRITEMASK_X,
+ TGSI_FILE_TEMPORARY, ts->point_size_tmp, TGSI_SWIZZLE_X,
+ TGSI_FILE_TEMPORARY, ts->point_pos_tmp, TGSI_SWIZZLE_W);
+
+ /* MUL point_scale.xy, point_scale.xx, inverseViewport.xy */
+ inst = tgsi_default_full_instruction();
+ inst.Instruction.Opcode = TGSI_OPCODE_MUL;
+ inst.Instruction.NumDstRegs = 1;
+ tgsi_transform_dst_reg(&inst.Dst[0], TGSI_FILE_TEMPORARY,
+ ts->point_scale_tmp, TGSI_WRITEMASK_XY);
+ inst.Instruction.NumSrcRegs = 2;
+ tgsi_transform_src_reg(&inst.Src[0], TGSI_FILE_TEMPORARY,
+ ts->point_scale_tmp, TGSI_SWIZZLE_X,
+ TGSI_SWIZZLE_X, TGSI_SWIZZLE_X, TGSI_SWIZZLE_X);
+ tgsi_transform_src_reg(&inst.Src[1], TGSI_FILE_CONSTANT,
+ ts->point_ivp, TGSI_SWIZZLE_X,
+ TGSI_SWIZZLE_Y, TGSI_SWIZZLE_Z, TGSI_SWIZZLE_Z);
+ ctx->emit_instruction(ctx, &inst);
+
+ /**
+ * Set up the point coord threshold distance
+ * k = 0.5 - 1 / pointsize
+ */
+ if (ts->aa_point) {
+ tgsi_transform_op2_swz_inst(ctx, TGSI_OPCODE_DIV,
+ TGSI_FILE_TEMPORARY, ts->point_coord_k,
+ TGSI_WRITEMASK_X,
+ TGSI_FILE_IMMEDIATE, ts->point_imm,
+ TGSI_SWIZZLE_Y,
+ TGSI_FILE_TEMPORARY, ts->point_size_tmp,
+ TGSI_SWIZZLE_X);
+
+ tgsi_transform_op2_swz_inst(ctx, TGSI_OPCODE_SUB,
+ TGSI_FILE_TEMPORARY, ts->point_coord_k,
+ TGSI_WRITEMASK_X,
+ TGSI_FILE_IMMEDIATE, ts->point_imm,
+ TGSI_SWIZZLE_Z,
+ TGSI_FILE_TEMPORARY, ts->point_coord_k,
+ TGSI_SWIZZLE_X);
+ }
+
+
+ for (i = 0; i < 4; i++) {
+ unsigned point_dir_swz = ts->point_dir_swz[i];
+ unsigned point_coord_swz = ts->point_coord_swz[i];
+
+ /* All outputs need to be emitted for each vertex */
+ for (j = 0; j < ts->num_orig_out; j++) {
+ if (ts->out_tmp_index[j] != INVALID_INDEX) {
+ tgsi_transform_op1_inst(ctx, TGSI_OPCODE_MOV,
+ TGSI_FILE_OUTPUT, j,
+ TGSI_WRITEMASK_XYZW,
+ TGSI_FILE_TEMPORARY, ts->out_tmp_index[j]);
+ }
+ }
+
+ /* pos = point_scale * point_dir + point_pos */
+ inst = tgsi_default_full_instruction();
+ inst.Instruction.Opcode = TGSI_OPCODE_MAD;
+ inst.Instruction.NumDstRegs = 1;
+ tgsi_transform_dst_reg(&inst.Dst[0], TGSI_FILE_OUTPUT, ts->point_pos_out,
+ TGSI_WRITEMASK_XYZW);
+ inst.Instruction.NumSrcRegs = 3;
+ tgsi_transform_src_reg(&inst.Src[0], TGSI_FILE_TEMPORARY, ts->point_scale_tmp,
+ TGSI_SWIZZLE_X, TGSI_SWIZZLE_Y, TGSI_SWIZZLE_X,
+ TGSI_SWIZZLE_X);
+ tgsi_transform_src_reg(&inst.Src[1], TGSI_FILE_IMMEDIATE, ts->point_imm,
+ get_swizzle(point_dir_swz, 0),
+ get_swizzle(point_dir_swz, 1),
+ get_swizzle(point_dir_swz, 2),
+ get_swizzle(point_dir_swz, 3));
+ tgsi_transform_src_reg(&inst.Src[2], TGSI_FILE_TEMPORARY, ts->point_pos_tmp,
+ TGSI_SWIZZLE_X, TGSI_SWIZZLE_Y, TGSI_SWIZZLE_Z,
+ TGSI_SWIZZLE_W);
+ ctx->emit_instruction(ctx, &inst);
+
+ /* point coord */
+ for (j = 0, s = 0, en = point_coord_enable; en; en>>=1, s++) {
+ unsigned dstReg;
+
+ if (en & 0x1) {
+ dstReg = ts->point_coord_out + j;
+
+ inst = tgsi_default_full_instruction();
+ inst.Instruction.Opcode = TGSI_OPCODE_MOV;
+ inst.Instruction.NumDstRegs = 1;
+ tgsi_transform_dst_reg(&inst.Dst[0], TGSI_FILE_OUTPUT,
+ dstReg, TGSI_WRITEMASK_XYZW);
+ inst.Instruction.NumSrcRegs = 1;
+ tgsi_transform_src_reg(&inst.Src[0], TGSI_FILE_IMMEDIATE, ts->point_imm,
+ get_swizzle(point_coord_swz, 0),
+ get_swizzle(point_coord_swz, 1),
+ get_swizzle(point_coord_swz, 2),
+ get_swizzle(point_coord_swz, 3));
+ ctx->emit_instruction(ctx, &inst);
+
+ /* MOV point_coord.z point_coord_k.x */
+ if (s == ts->point_coord_aa) {
+ tgsi_transform_op1_swz_inst(ctx, TGSI_OPCODE_MOV,
+ TGSI_FILE_OUTPUT, dstReg, TGSI_WRITEMASK_Z,
+ TGSI_FILE_TEMPORARY, ts->point_coord_k,
+ TGSI_SWIZZLE_X);
+ }
+ j++; /* the next point coord output offset */
+ }
+ }
+
+ /* Emit the EMIT instruction for each vertex of the quad */
+ ctx->emit_instruction(ctx, vert_inst);
+ }
+
+ /* Emit the ENDPRIM instruction for the quad */
+ inst = tgsi_default_full_instruction();
+ inst.Instruction.Opcode = TGSI_OPCODE_ENDPRIM;
+ inst.Instruction.NumDstRegs = 0;
+ inst.Instruction.NumSrcRegs = 1;
+ inst.Src[0] = vert_inst->Src[0];
+ ctx->emit_instruction(ctx, &inst);
+}
+
+
+/**
+ * TGSI instruction transform callback.
+ */
+static void
+psprite_inst(struct tgsi_transform_context *ctx,
+ struct tgsi_full_instruction *inst)
+{
+ struct psprite_transform_context *ts = psprite_transform_context(ctx);
+
+ if (inst->Instruction.Opcode == TGSI_OPCODE_EMIT) {
+ psprite_emit_vertex_inst(ctx, inst);
+ }
+ else if (inst->Dst[0].Register.File == TGSI_FILE_OUTPUT &&
+ inst->Dst[0].Register.Index == ts->point_size_out) {
+ /**
+ * Replace point size output reg with tmp reg.
+ * The tmp reg will be later used as a src reg for computing
+ * the point scale factor.
+ */
+ inst->Dst[0].Register.File = TGSI_FILE_TEMPORARY;
+ inst->Dst[0].Register.Index = ts->point_size_tmp;
+ ctx->emit_instruction(ctx, inst);
+
+ /* Clamp the point size */
+ /* MAX point_size_tmp.x, point_size_tmp.x, point_imm.y */
+ tgsi_transform_op2_swz_inst(ctx, TGSI_OPCODE_MAX,
+ TGSI_FILE_TEMPORARY, ts->point_size_tmp, TGSI_WRITEMASK_X,
+ TGSI_FILE_TEMPORARY, ts->point_size_tmp, TGSI_SWIZZLE_X,
+ TGSI_FILE_IMMEDIATE, ts->point_imm, TGSI_SWIZZLE_Y);
+
+ /* MIN point_size_tmp.x, point_size_tmp.x, point_ivp.w */
+ tgsi_transform_op2_swz_inst(ctx, TGSI_OPCODE_MIN,
+ TGSI_FILE_TEMPORARY, ts->point_size_tmp, TGSI_WRITEMASK_X,
+ TGSI_FILE_TEMPORARY, ts->point_size_tmp, TGSI_SWIZZLE_X,
+ TGSI_FILE_CONSTANT, ts->point_ivp, TGSI_SWIZZLE_W);
+ }
+ else if (inst->Dst[0].Register.File == TGSI_FILE_OUTPUT &&
+ inst->Dst[0].Register.Index == ts->point_pos_out) {
+ /**
+ * Replace point pos output reg with tmp reg.
+ */
+ inst->Dst[0].Register.File = TGSI_FILE_TEMPORARY;
+ inst->Dst[0].Register.Index = ts->point_pos_tmp;
+ ctx->emit_instruction(ctx, inst);
+ }
+ else if (inst->Dst[0].Register.File == TGSI_FILE_OUTPUT) {
+ /**
+ * Replace output reg with tmp reg.
+ */
+ inst->Dst[0].Register.File = TGSI_FILE_TEMPORARY;
+ inst->Dst[0].Register.Index = ts->out_tmp_index[inst->Dst[0].Register.Index];
+ ctx->emit_instruction(ctx, inst);
+ }
+ else {
+ ctx->emit_instruction(ctx, inst);
+ }
+}
+
+
+/**
+ * TGSI property instruction transform callback.
+ * Transforms a point into a 4-vertex triangle strip.
+ */
+static void
+psprite_property(struct tgsi_transform_context *ctx,
+ struct tgsi_full_property *prop)
+{
+ switch (prop->Property.PropertyName) {
+ case TGSI_PROPERTY_GS_OUTPUT_PRIM:
+ prop->u[0].Data = PIPE_PRIM_TRIANGLE_STRIP;
+ break;
+ case TGSI_PROPERTY_GS_MAX_OUTPUT_VERTICES:
+ prop->u[0].Data *= 4;
+ break;
+ default:
+ break;
+ }
+ ctx->emit_property(ctx, prop);
+}
+
+/**
+ * TGSI utility to transform a geometry shader to support point sprite.
+ */
+struct tgsi_token *
+tgsi_add_point_sprite(const struct tgsi_token *tokens_in,
+ const unsigned point_coord_enable,
+ const bool sprite_origin_lower_left,
+ const bool stream_out_point_pos,
+ int *aa_point_coord_index)
+{
+ struct psprite_transform_context transform;
+ const uint num_new_tokens = 200; /* should be enough */
+ const uint new_len = tgsi_num_tokens(tokens_in) + num_new_tokens;
+ struct tgsi_token *new_tokens;
+
+ /* setup transformation context */
+ memset(&transform, 0, sizeof(transform));
+ transform.base.transform_declaration = psprite_decl;
+ transform.base.transform_instruction = psprite_inst;
+ transform.base.transform_property = psprite_property;
+ transform.base.transform_immediate = psprite_immediate;
+ transform.base.prolog = psprite_prolog;
+
+ transform.point_size_in = INVALID_INDEX;
+ transform.point_size_out = INVALID_INDEX;
+ transform.point_size_tmp = INVALID_INDEX;
+ transform.point_pos_in = INVALID_INDEX;
+ transform.point_pos_out = INVALID_INDEX;
+ transform.point_pos_sout = INVALID_INDEX;
+ transform.point_pos_tmp = INVALID_INDEX;
+ transform.point_scale_tmp = INVALID_INDEX;
+ transform.point_imm = INVALID_INDEX;
+ transform.point_coord_aa = INVALID_INDEX;
+ transform.point_coord_k = INVALID_INDEX;
+
+ transform.stream_out_point_pos = stream_out_point_pos;
+ transform.point_coord_enable = point_coord_enable;
+ transform.aa_point = aa_point_coord_index != NULL;
+ transform.max_generic = -1;
+
+ /* point sprite directions based on the immediates (0, 1, 0.5, -1) */
+ /* (-1, -1, 0, 0) */
+ transform.point_dir_swz[0] = set_swizzle(-1, -1, 0, 0);
+ /* (-1, 1, 0, 0) */
+ transform.point_dir_swz[1] = set_swizzle(-1, 1, 0, 0);
+ /* (1, -1, 0, 0) */
+ transform.point_dir_swz[2] = set_swizzle(1, -1, 0, 0);
+ /* (1, 1, 0, 0) */
+ transform.point_dir_swz[3] = set_swizzle(1, 1, 0, 0);
+
+ /* point coord based on the immediates (0, 1, 0, -1) */
+ if (sprite_origin_lower_left) {
+ /* (0, 0, 0, 1) */
+ transform.point_coord_swz[0] = set_swizzle(0, 0, 0, 1);
+ /* (0, 1, 0, 1) */
+ transform.point_coord_swz[1] = set_swizzle(0, 1, 0, 1);
+ /* (1, 0, 0, 1) */
+ transform.point_coord_swz[2] = set_swizzle(1, 0, 0, 1);
+ /* (1, 1, 0, 1) */
+ transform.point_coord_swz[3] = set_swizzle(1, 1, 0, 1);
+ }
+ else {
+ /* (0, 1, 0, 1) */
+ transform.point_coord_swz[0] = set_swizzle(0, 1, 0, 1);
+ /* (0, 0, 0, 1) */
+ transform.point_coord_swz[1] = set_swizzle(0, 0, 0, 1);
+ /* (1, 1, 0, 1) */
+ transform.point_coord_swz[2] = set_swizzle(1, 1, 0, 1);
+ /* (1, 0, 0, 1) */
+ transform.point_coord_swz[3] = set_swizzle(1, 0, 0, 1);
+ }
+
+
+ /* allocate new tokens buffer */
+ new_tokens = tgsi_alloc_tokens(new_len);
+ if (!new_tokens)
+ return NULL;
+
+ /* transform the shader */
+ tgsi_transform_shader(tokens_in, new_tokens, new_len, &transform.base);
+
+ if (aa_point_coord_index)
+ *aa_point_coord_index = transform.point_coord_aa;
+
+ return new_tokens;
+}
projects / mesa.git / commitdiff