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-rw-r--r--src/gallium/auxiliary/draw/draw_pipe_pstipple.c770
1 files changed, 770 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/draw/draw_pipe_pstipple.c b/src/gallium/auxiliary/draw/draw_pipe_pstipple.c
new file mode 100644
index 0000000000..b764d9c518
--- /dev/null
+++ b/src/gallium/auxiliary/draw/draw_pipe_pstipple.c
@@ -0,0 +1,770 @@
+/**************************************************************************
+ *
+ * Copyright 2008 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.
+ *
+ **************************************************************************/
+
+/**
+ * Polygon stipple stage: implement polygon stipple with texture map and
+ * fragment program. The fragment program samples the texture and does
+ * a fragment kill for the stipple-failing fragments.
+ *
+ * Authors: Brian Paul
+ */
+
+
+#include "pipe/p_inlines.h"
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_shader_tokens.h"
+
+#include "util/u_math.h"
+#include "util/u_memory.h"
+
+#include "tgsi/tgsi_transform.h"
+#include "tgsi/tgsi_dump.h"
+
+#include "draw_context.h"
+#include "draw_pipe.h"
+
+
+
+/**
+ * Subclass of pipe_shader_state to carry extra fragment shader info.
+ */
+struct pstip_fragment_shader
+{
+ struct pipe_shader_state state;
+ void *driver_fs;
+ void *pstip_fs;
+ uint sampler_unit;
+};
+
+
+/**
+ * Subclass of draw_stage
+ */
+struct pstip_stage
+{
+ struct draw_stage stage;
+
+ void *sampler_cso;
+ struct pipe_texture *texture;
+ uint num_samplers;
+ uint num_textures;
+
+ /*
+ * Currently bound state
+ */
+ struct pstip_fragment_shader *fs;
+ struct {
+ void *samplers[PIPE_MAX_SAMPLERS];
+ struct pipe_texture *textures[PIPE_MAX_SAMPLERS];
+ const struct pipe_poly_stipple *stipple;
+ } state;
+
+ /*
+ * Driver interface/override functions
+ */
+ void * (*driver_create_fs_state)(struct pipe_context *,
+ const struct pipe_shader_state *);
+ void (*driver_bind_fs_state)(struct pipe_context *, void *);
+ void (*driver_delete_fs_state)(struct pipe_context *, void *);
+
+ void (*driver_bind_sampler_states)(struct pipe_context *, unsigned, void **);
+
+ void (*driver_set_sampler_textures)(struct pipe_context *, unsigned,
+ struct pipe_texture **);
+
+ void (*driver_set_polygon_stipple)(struct pipe_context *,
+ const struct pipe_poly_stipple *);
+
+ struct pipe_context *pipe;
+};
+
+
+
+/**
+ * Subclass of tgsi_transform_context, used for transforming the
+ * user's fragment shader to add the special AA instructions.
+ */
+struct pstip_transform_context {
+ struct tgsi_transform_context base;
+ uint tempsUsed; /**< bitmask */
+ int wincoordInput;
+ int maxInput;
+ uint samplersUsed; /**< bitfield of samplers used */
+ int freeSampler; /** an available sampler for the pstipple */
+ int texTemp; /**< temp registers */
+ int numImmed;
+ boolean firstInstruction;
+};
+
+
+/**
+ * TGSI declaration transform callback.
+ * Look for a free sampler, a free input attrib, and two free temp regs.
+ */
+static void
+pstip_transform_decl(struct tgsi_transform_context *ctx,
+ struct tgsi_full_declaration *decl)
+{
+ struct pstip_transform_context *pctx = (struct pstip_transform_context *) ctx;
+
+ if (decl->Declaration.File == TGSI_FILE_SAMPLER) {
+ uint i;
+ for (i = decl->DeclarationRange.First;
+ i <= decl->DeclarationRange.Last; i++) {
+ pctx->samplersUsed |= 1 << i;
+ }
+ }
+ else if (decl->Declaration.File == TGSI_FILE_INPUT) {
+ pctx->maxInput = MAX2(pctx->maxInput, (int) decl->DeclarationRange.Last);
+ if (decl->Semantic.SemanticName == TGSI_SEMANTIC_POSITION)
+ pctx->wincoordInput = (int) decl->DeclarationRange.First;
+ }
+ else if (decl->Declaration.File == TGSI_FILE_TEMPORARY) {
+ uint i;
+ for (i = decl->DeclarationRange.First;
+ i <= decl->DeclarationRange.Last; i++) {
+ pctx->tempsUsed |= (1 << i);
+ }
+ }
+
+ ctx->emit_declaration(ctx, decl);
+}
+
+
+static void
+pstip_transform_immed(struct tgsi_transform_context *ctx,
+ struct tgsi_full_immediate *immed)
+{
+ struct pstip_transform_context *pctx = (struct pstip_transform_context *) ctx;
+ pctx->numImmed++;
+}
+
+
+/**
+ * Find the lowest zero bit in the given word, or -1 if bitfield is all ones.
+ */
+static int
+free_bit(uint bitfield)
+{
+ int i;
+ for (i = 0; i < 32; i++) {
+ if ((bitfield & (1 << i)) == 0)
+ return i;
+ }
+ return -1;
+}
+
+
+/**
+ * TGSI instruction transform callback.
+ * Replace writes to result.color w/ a temp reg.
+ * Upon END instruction, insert texture sampling code for antialiasing.
+ */
+static void
+pstip_transform_inst(struct tgsi_transform_context *ctx,
+ struct tgsi_full_instruction *inst)
+{
+ struct pstip_transform_context *pctx = (struct pstip_transform_context *) ctx;
+
+ if (pctx->firstInstruction) {
+ /* emit our new declarations before the first instruction */
+
+ struct tgsi_full_declaration decl;
+ struct tgsi_full_instruction newInst;
+ uint i;
+ int wincoordInput;
+
+ /* find free sampler */
+ pctx->freeSampler = free_bit(pctx->samplersUsed);
+ if (pctx->freeSampler >= PIPE_MAX_SAMPLERS)
+ pctx->freeSampler = PIPE_MAX_SAMPLERS - 1;
+
+ if (pctx->wincoordInput < 0)
+ wincoordInput = pctx->maxInput + 1;
+ else
+ wincoordInput = pctx->wincoordInput;
+
+ /* find one free temp reg */
+ for (i = 0; i < 32; i++) {
+ if ((pctx->tempsUsed & (1 << i)) == 0) {
+ /* found a free temp */
+ if (pctx->texTemp < 0)
+ pctx->texTemp = i;
+ else
+ break;
+ }
+ }
+ assert(pctx->texTemp >= 0);
+
+ if (pctx->wincoordInput < 0) {
+ /* declare new position input reg */
+ decl = tgsi_default_full_declaration();
+ decl.Declaration.File = TGSI_FILE_INPUT;
+ decl.Declaration.Interpolate = TGSI_INTERPOLATE_LINEAR; /* XXX? */
+ decl.Declaration.Semantic = 1;
+ decl.Semantic.SemanticName = TGSI_SEMANTIC_POSITION;
+ decl.Semantic.SemanticIndex = 0;
+ decl.DeclarationRange.First =
+ decl.DeclarationRange.Last = wincoordInput;
+ ctx->emit_declaration(ctx, &decl);
+ }
+
+ /* declare new sampler */
+ decl = tgsi_default_full_declaration();
+ decl.Declaration.File = TGSI_FILE_SAMPLER;
+ decl.DeclarationRange.First =
+ decl.DeclarationRange.Last = pctx->freeSampler;
+ ctx->emit_declaration(ctx, &decl);
+
+ /* declare new temp regs */
+ decl = tgsi_default_full_declaration();
+ decl.Declaration.File = TGSI_FILE_TEMPORARY;
+ decl.DeclarationRange.First =
+ decl.DeclarationRange.Last = pctx->texTemp;
+ ctx->emit_declaration(ctx, &decl);
+
+ /* emit immediate = {1/32, 1/32, 1, 1}
+ * The index/position of this immediate will be pctx->numImmed
+ */
+ {
+ static const float value[4] = { 1.0/32, 1.0/32, 1.0, 1.0 };
+ struct tgsi_full_immediate immed;
+ uint size = 4;
+ immed = tgsi_default_full_immediate();
+ immed.Immediate.Size = 1 + size; /* one for the token itself */
+ immed.u.Pointer = (void *) value;
+ ctx->emit_immediate(ctx, &immed);
+ }
+
+ pctx->firstInstruction = FALSE;
+
+
+ /*
+ * Insert new MUL/TEX/KILP instructions at start of program
+ * Take gl_FragCoord, divide by 32 (stipple size), sample the
+ * texture and kill fragment if needed.
+ *
+ * We'd like to use non-normalized texcoords to index into a RECT
+ * texture, but we can only use GL_REPEAT wrap mode with normalized
+ * texcoords. Darn.
+ */
+
+ /* MUL texTemp, INPUT[wincoord], 1/32; */
+ newInst = tgsi_default_full_instruction();
+ newInst.Instruction.Opcode = TGSI_OPCODE_MUL;
+ newInst.Instruction.NumDstRegs = 1;
+ newInst.FullDstRegisters[0].DstRegister.File = TGSI_FILE_TEMPORARY;
+ newInst.FullDstRegisters[0].DstRegister.Index = pctx->texTemp;
+ newInst.Instruction.NumSrcRegs = 2;
+ newInst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_INPUT;
+ newInst.FullSrcRegisters[0].SrcRegister.Index = wincoordInput;
+ newInst.FullSrcRegisters[1].SrcRegister.File = TGSI_FILE_IMMEDIATE;
+ newInst.FullSrcRegisters[1].SrcRegister.Index = pctx->numImmed;
+ ctx->emit_instruction(ctx, &newInst);
+
+ /* TEX texTemp, texTemp, sampler; */
+ newInst = tgsi_default_full_instruction();
+ newInst.Instruction.Opcode = TGSI_OPCODE_TEX;
+ newInst.Instruction.NumDstRegs = 1;
+ newInst.FullDstRegisters[0].DstRegister.File = TGSI_FILE_TEMPORARY;
+ newInst.FullDstRegisters[0].DstRegister.Index = pctx->texTemp;
+ newInst.Instruction.NumSrcRegs = 2;
+ newInst.InstructionExtTexture.Texture = TGSI_TEXTURE_2D;
+ newInst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_TEMPORARY;
+ newInst.FullSrcRegisters[0].SrcRegister.Index = pctx->texTemp;
+ newInst.FullSrcRegisters[1].SrcRegister.File = TGSI_FILE_SAMPLER;
+ newInst.FullSrcRegisters[1].SrcRegister.Index = pctx->freeSampler;
+ ctx->emit_instruction(ctx, &newInst);
+
+ /* KIL -texTemp; # if -texTemp < 0, KILL fragment */
+ newInst = tgsi_default_full_instruction();
+ newInst.Instruction.Opcode = TGSI_OPCODE_KIL;
+ newInst.Instruction.NumDstRegs = 0;
+ newInst.Instruction.NumSrcRegs = 1;
+ newInst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_TEMPORARY;
+ newInst.FullSrcRegisters[0].SrcRegister.Index = pctx->texTemp;
+ newInst.FullSrcRegisters[0].SrcRegister.Negate = 1;
+ ctx->emit_instruction(ctx, &newInst);
+ }
+
+ /* emit this instruction */
+ ctx->emit_instruction(ctx, inst);
+}
+
+
+/**
+ * Generate the frag shader we'll use for doing polygon stipple.
+ * This will be the user's shader prefixed with a TEX and KIL instruction.
+ */
+static boolean
+generate_pstip_fs(struct pstip_stage *pstip)
+{
+ const struct pipe_shader_state *orig_fs = &pstip->fs->state;
+ /*struct draw_context *draw = pstip->stage.draw;*/
+ struct pipe_shader_state pstip_fs;
+ struct pstip_transform_context transform;
+
+#define MAX 1000
+
+ pstip_fs = *orig_fs; /* copy to init */
+ pstip_fs.tokens = MALLOC(sizeof(struct tgsi_token) * MAX);
+ if (pstip_fs.tokens == NULL)
+ return FALSE;
+
+ memset(&transform, 0, sizeof(transform));
+ transform.wincoordInput = -1;
+ transform.maxInput = -1;
+ transform.texTemp = -1;
+ transform.firstInstruction = TRUE;
+ transform.base.transform_instruction = pstip_transform_inst;
+ transform.base.transform_declaration = pstip_transform_decl;
+ transform.base.transform_immediate = pstip_transform_immed;
+
+ tgsi_transform_shader(orig_fs->tokens,
+ (struct tgsi_token *) pstip_fs.tokens,
+ MAX, &transform.base);
+
+#if 0 /* DEBUG */
+ tgsi_dump(orig_fs->tokens, 0);
+ tgsi_dump(pstip_fs.tokens, 0);
+#endif
+
+ pstip->fs->sampler_unit = transform.freeSampler;
+ assert(pstip->fs->sampler_unit < PIPE_MAX_SAMPLERS);
+
+ pstip->fs->pstip_fs = pstip->driver_create_fs_state(pstip->pipe, &pstip_fs);
+
+ return TRUE;
+}
+
+
+/**
+ * Load texture image with current stipple pattern.
+ */
+static void
+pstip_update_texture(struct pstip_stage *pstip)
+{
+ static const uint bit31 = 1 << 31;
+ struct pipe_context *pipe = pstip->pipe;
+ struct pipe_screen *screen = pipe->screen;
+ struct pipe_surface *surface;
+ const uint *stipple = pstip->state.stipple->stipple;
+ uint i, j;
+ ubyte *data;
+
+ /* XXX: want to avoid flushing just because we use stipple:
+ */
+ pipe->flush( pipe, PIPE_FLUSH_TEXTURE_CACHE, NULL );
+
+ surface = screen->get_tex_surface(screen, pstip->texture, 0, 0, 0,
+ PIPE_BUFFER_USAGE_CPU_WRITE);
+ data = screen->surface_map(screen, surface,
+ PIPE_BUFFER_USAGE_CPU_WRITE);
+
+ /*
+ * Load alpha texture.
+ * Note: 0 means keep the fragment, 255 means kill it.
+ * We'll negate the texel value and use KILP which kills if value
+ * is negative.
+ */
+ for (i = 0; i < 32; i++) {
+ for (j = 0; j < 32; j++) {
+ if (stipple[i] & (bit31 >> j)) {
+ /* fragment "on" */
+ data[i * surface->stride + j] = 0;
+ }
+ else {
+ /* fragment "off" */
+ data[i * surface->stride + j] = 255;
+ }
+ }
+ }
+
+ /* unmap */
+ screen->surface_unmap(screen, surface);
+ screen->tex_surface_release(screen, &surface);
+}
+
+
+/**
+ * Create the texture map we'll use for stippling.
+ */
+static boolean
+pstip_create_texture(struct pstip_stage *pstip)
+{
+ struct pipe_context *pipe = pstip->pipe;
+ struct pipe_screen *screen = pipe->screen;
+ struct pipe_texture texTemp;
+
+ memset(&texTemp, 0, sizeof(texTemp));
+ texTemp.target = PIPE_TEXTURE_2D;
+ texTemp.format = PIPE_FORMAT_A8_UNORM; /* XXX verify supported by driver! */
+ texTemp.last_level = 0;
+ texTemp.width[0] = 32;
+ texTemp.height[0] = 32;
+ texTemp.depth[0] = 1;
+ pf_get_block(texTemp.format, &texTemp.block);
+
+ pstip->texture = screen->texture_create(screen, &texTemp);
+ if (pstip->texture == NULL)
+ return FALSE;
+
+ return TRUE;
+}
+
+
+/**
+ * Create the sampler CSO that'll be used for stippling.
+ */
+static boolean
+pstip_create_sampler(struct pstip_stage *pstip)
+{
+ struct pipe_sampler_state sampler;
+ struct pipe_context *pipe = pstip->pipe;
+
+ memset(&sampler, 0, sizeof(sampler));
+ sampler.wrap_s = PIPE_TEX_WRAP_REPEAT;
+ sampler.wrap_t = PIPE_TEX_WRAP_REPEAT;
+ sampler.wrap_r = PIPE_TEX_WRAP_REPEAT;
+ sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
+ sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;
+ sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
+ sampler.normalized_coords = 1;
+ sampler.min_lod = 0.0f;
+ sampler.max_lod = 0.0f;
+
+ pstip->sampler_cso = pipe->create_sampler_state(pipe, &sampler);
+ if (pstip->sampler_cso == NULL)
+ return FALSE;
+
+ return TRUE;
+}
+
+
+/**
+ * When we're about to draw our first stipple polygon in a batch, this function
+ * is called to tell the driver to bind our modified fragment shader.
+ */
+static boolean
+bind_pstip_fragment_shader(struct pstip_stage *pstip)
+{
+ struct draw_context *draw = pstip->stage.draw;
+ if (!pstip->fs->pstip_fs &&
+ !generate_pstip_fs(pstip))
+ return FALSE;
+
+ draw->suspend_flushing = TRUE;
+ pstip->driver_bind_fs_state(pstip->pipe, pstip->fs->pstip_fs);
+ draw->suspend_flushing = FALSE;
+ return TRUE;
+}
+
+
+static INLINE struct pstip_stage *
+pstip_stage( struct draw_stage *stage )
+{
+ return (struct pstip_stage *) stage;
+}
+
+
+static void
+pstip_first_tri(struct draw_stage *stage, struct prim_header *header)
+{
+ struct pstip_stage *pstip = pstip_stage(stage);
+ struct pipe_context *pipe = pstip->pipe;
+ struct draw_context *draw = stage->draw;
+ uint num_samplers;
+
+ assert(stage->draw->rasterizer->poly_stipple_enable);
+
+ /* bind our fragprog */
+ if (!bind_pstip_fragment_shader(pstip)) {
+ stage->tri = draw_pipe_passthrough_tri;
+ stage->tri(stage, header);
+ return;
+ }
+
+
+ /* how many samplers? */
+ /* we'll use sampler/texture[pstip->sampler_unit] for the stipple */
+ num_samplers = MAX2(pstip->num_textures, pstip->num_samplers);
+ num_samplers = MAX2(num_samplers, pstip->fs->sampler_unit + 1);
+
+ /* plug in our sampler, texture */
+ pstip->state.samplers[pstip->fs->sampler_unit] = pstip->sampler_cso;
+ pipe_texture_reference(&pstip->state.textures[pstip->fs->sampler_unit],
+ pstip->texture);
+
+ assert(num_samplers <= PIPE_MAX_SAMPLERS);
+
+ draw->suspend_flushing = TRUE;
+ pstip->driver_bind_sampler_states(pipe, num_samplers, pstip->state.samplers);
+ pstip->driver_set_sampler_textures(pipe, num_samplers, pstip->state.textures);
+ draw->suspend_flushing = FALSE;
+
+ /* now really draw first triangle */
+ stage->tri = draw_pipe_passthrough_tri;
+ stage->tri(stage, header);
+}
+
+
+static void
+pstip_flush(struct draw_stage *stage, unsigned flags)
+{
+ struct draw_context *draw = stage->draw;
+ struct pstip_stage *pstip = pstip_stage(stage);
+ struct pipe_context *pipe = pstip->pipe;
+
+ stage->tri = pstip_first_tri;
+ stage->next->flush( stage->next, flags );
+
+ /* restore original frag shader, texture, sampler state */
+ draw->suspend_flushing = TRUE;
+ pstip->driver_bind_fs_state(pipe, pstip->fs->driver_fs);
+ pstip->driver_bind_sampler_states(pipe, pstip->num_samplers,
+ pstip->state.samplers);
+ pstip->driver_set_sampler_textures(pipe, pstip->num_textures,
+ pstip->state.textures);
+ draw->suspend_flushing = FALSE;
+}
+
+
+static void
+pstip_reset_stipple_counter(struct draw_stage *stage)
+{
+ stage->next->reset_stipple_counter( stage->next );
+}
+
+
+static void
+pstip_destroy(struct draw_stage *stage)
+{
+ struct pstip_stage *pstip = pstip_stage(stage);
+ uint i;
+
+ for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
+ pipe_texture_reference(&pstip->state.textures[i], NULL);
+ }
+
+ pstip->pipe->delete_sampler_state(pstip->pipe, pstip->sampler_cso);
+
+ pipe_texture_release(&pstip->texture);
+
+ draw_free_temp_verts( stage );
+ FREE( stage );
+}
+
+
+static struct pstip_stage *
+draw_pstip_stage(struct draw_context *draw)
+{
+ struct pstip_stage *pstip = CALLOC_STRUCT(pstip_stage);
+
+ draw_alloc_temp_verts( &pstip->stage, 8 );
+
+ pstip->stage.draw = draw;
+ pstip->stage.next = NULL;
+ pstip->stage.point = draw_pipe_passthrough_point;
+ pstip->stage.line = draw_pipe_passthrough_line;
+ pstip->stage.tri = pstip_first_tri;
+ pstip->stage.flush = pstip_flush;
+ pstip->stage.reset_stipple_counter = pstip_reset_stipple_counter;
+ pstip->stage.destroy = pstip_destroy;
+
+ return pstip;
+}
+
+
+static struct pstip_stage *
+pstip_stage_from_pipe(struct pipe_context *pipe)
+{
+ struct draw_context *draw = (struct draw_context *) pipe->draw;
+ return pstip_stage(draw->pipeline.pstipple);
+}
+
+
+/**
+ * This function overrides the driver's create_fs_state() function and
+ * will typically be called by the state tracker.
+ */
+static void *
+pstip_create_fs_state(struct pipe_context *pipe,
+ const struct pipe_shader_state *fs)
+{
+ struct pstip_stage *pstip = pstip_stage_from_pipe(pipe);
+ struct pstip_fragment_shader *aafs = CALLOC_STRUCT(pstip_fragment_shader);
+
+ if (aafs) {
+ aafs->state = *fs;
+
+ /* pass-through */
+ aafs->driver_fs = pstip->driver_create_fs_state(pstip->pipe, fs);
+ }
+
+ return aafs;
+}
+
+
+static void
+pstip_bind_fs_state(struct pipe_context *pipe, void *fs)
+{
+ struct pstip_stage *pstip = pstip_stage_from_pipe(pipe);
+ struct pstip_fragment_shader *aafs = (struct pstip_fragment_shader *) fs;
+ /* save current */
+ pstip->fs = aafs;
+ /* pass-through */
+ pstip->driver_bind_fs_state(pstip->pipe,
+ (aafs ? aafs->driver_fs : NULL));
+}
+
+
+static void
+pstip_delete_fs_state(struct pipe_context *pipe, void *fs)
+{
+ struct pstip_stage *pstip = pstip_stage_from_pipe(pipe);
+ struct pstip_fragment_shader *aafs = (struct pstip_fragment_shader *) fs;
+ /* pass-through */
+ pstip->driver_delete_fs_state(pstip->pipe, aafs->driver_fs);
+ FREE(aafs);
+}
+
+
+static void
+pstip_bind_sampler_states(struct pipe_context *pipe,
+ unsigned num, void **sampler)
+{
+ struct pstip_stage *pstip = pstip_stage_from_pipe(pipe);
+ uint i;
+
+ /* save current */
+ memcpy(pstip->state.samplers, sampler, num * sizeof(void *));
+ for (i = num; i < PIPE_MAX_SAMPLERS; i++) {
+ pstip->state.samplers[i] = NULL;
+ }
+
+ pstip->num_samplers = num;
+ /* pass-through */
+ pstip->driver_bind_sampler_states(pstip->pipe, num, sampler);
+}
+
+
+static void
+pstip_set_sampler_textures(struct pipe_context *pipe,
+ unsigned num, struct pipe_texture **texture)
+{
+ struct pstip_stage *pstip = pstip_stage_from_pipe(pipe);
+ uint i;
+
+ /* save current */
+ for (i = 0; i < num; i++) {
+ pipe_texture_reference(&pstip->state.textures[i], texture[i]);
+ }
+ for (; i < PIPE_MAX_SAMPLERS; i++) {
+ pipe_texture_reference(&pstip->state.textures[i], NULL);
+ }
+
+ pstip->num_textures = num;
+
+ /* pass-through */
+ pstip->driver_set_sampler_textures(pstip->pipe, num, texture);
+}
+
+
+static void
+pstip_set_polygon_stipple(struct pipe_context *pipe,
+ const struct pipe_poly_stipple *stipple)
+{
+ struct pstip_stage *pstip = pstip_stage_from_pipe(pipe);
+
+ /* save current */
+ pstip->state.stipple = stipple;
+
+ /* pass-through */
+ pstip->driver_set_polygon_stipple(pstip->pipe, stipple);
+
+ pstip_update_texture(pstip);
+}
+
+
+/**
+ * Called by drivers that want to install this polygon stipple stage
+ * into the draw module's pipeline. This will not be used if the
+ * hardware has native support for polygon stipple.
+ */
+boolean
+draw_install_pstipple_stage(struct draw_context *draw,
+ struct pipe_context *pipe)
+{
+ struct pstip_stage *pstip;
+
+ pipe->draw = (void *) draw;
+
+ /*
+ * Create / install pgon stipple drawing / prim stage
+ */
+ pstip = draw_pstip_stage( draw );
+ if (pstip == NULL)
+ goto fail;
+
+ draw->pipeline.pstipple = &pstip->stage;
+
+ pstip->pipe = pipe;
+
+ /* create special texture, sampler state */
+ if (!pstip_create_texture(pstip))
+ goto fail;
+
+ if (!pstip_create_sampler(pstip))
+ goto fail;
+
+ /* save original driver functions */
+ pstip->driver_create_fs_state = pipe->create_fs_state;
+ pstip->driver_bind_fs_state = pipe->bind_fs_state;
+ pstip->driver_delete_fs_state = pipe->delete_fs_state;
+
+ pstip->driver_bind_sampler_states = pipe->bind_sampler_states;
+ pstip->driver_set_sampler_textures = pipe->set_sampler_textures;
+ pstip->driver_set_polygon_stipple = pipe->set_polygon_stipple;
+
+ /* override the driver's functions */
+ pipe->create_fs_state = pstip_create_fs_state;
+ pipe->bind_fs_state = pstip_bind_fs_state;
+ pipe->delete_fs_state = pstip_delete_fs_state;
+
+ pipe->bind_sampler_states = pstip_bind_sampler_states;
+ pipe->set_sampler_textures = pstip_set_sampler_textures;
+ pipe->set_polygon_stipple = pstip_set_polygon_stipple;
+
+ return TRUE;
+
+ fail:
+ if (pstip)
+ pstip->stage.destroy( &pstip->stage );
+
+ return FALSE;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-23 17:25:44 +0000