diff options
Diffstat (limited to 'src/gallium/auxiliary/draw/draw_pipe_pstipple.c')
| -rw-r--r-- | src/gallium/auxiliary/draw/draw_pipe_pstipple.c | 770 |
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 00000000000..b764d9c518c --- /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; +} |