| /************************************************************************** |
| * |
| * Copyright 2007-2018 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 VMWARE 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. |
| * |
| **************************************************************************/ |
| |
| /** |
| * AA line stage: AA lines are converted triangles (with extra generic) |
| * |
| * Authors: Brian Paul |
| */ |
| |
| |
| #include "pipe/p_context.h" |
| #include "pipe/p_defines.h" |
| #include "pipe/p_shader_tokens.h" |
| #include "util/u_inlines.h" |
| |
| #include "util/format/u_format.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_private.h" |
| #include "draw_pipe.h" |
| |
| #include "nir.h" |
| #include "nir/nir_draw_helpers.h" |
| |
| /** Approx number of new tokens for instructions in aa_transform_inst() */ |
| #define NUM_NEW_TOKENS 53 |
| |
| |
| /** |
| * Subclass of pipe_shader_state to carry extra fragment shader info. |
| */ |
| struct aaline_fragment_shader |
| { |
| struct pipe_shader_state state; |
| void *driver_fs; |
| void *aaline_fs; |
| int generic_attrib; /**< generic used for distance */ |
| }; |
| |
| |
| /** |
| * Subclass of draw_stage |
| */ |
| struct aaline_stage |
| { |
| struct draw_stage stage; |
| |
| float half_line_width; |
| |
| /** For AA lines, this is the vertex attrib slot for new generic */ |
| uint coord_slot; |
| /** position, not necessarily output zero */ |
| uint pos_slot; |
| |
| |
| /* |
| * Currently bound state |
| */ |
| struct aaline_fragment_shader *fs; |
| |
| /* |
| * 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 *); |
| }; |
| |
| |
| |
| /** |
| * Subclass of tgsi_transform_context, used for transforming the |
| * user's fragment shader to add the special AA instructions. |
| */ |
| struct aa_transform_context { |
| struct tgsi_transform_context base; |
| uint64_t tempsUsed; /**< bitmask */ |
| int colorOutput; /**< which output is the primary color */ |
| int maxInput, maxGeneric; /**< max input index found */ |
| int colorTemp, aaTemp; /**< temp registers */ |
| }; |
| |
| /** |
| * TGSI declaration transform callback. |
| * Look for a free input attrib, and two free temp regs. |
| */ |
| static void |
| aa_transform_decl(struct tgsi_transform_context *ctx, |
| struct tgsi_full_declaration *decl) |
| { |
| struct aa_transform_context *aactx = (struct aa_transform_context *)ctx; |
| |
| if (decl->Declaration.File == TGSI_FILE_OUTPUT && |
| decl->Semantic.Name == TGSI_SEMANTIC_COLOR && |
| decl->Semantic.Index == 0) { |
| aactx->colorOutput = decl->Range.First; |
| } |
| else if (decl->Declaration.File == TGSI_FILE_INPUT) { |
| if ((int) decl->Range.Last > aactx->maxInput) |
| aactx->maxInput = decl->Range.Last; |
| if (decl->Semantic.Name == TGSI_SEMANTIC_GENERIC && |
| (int) decl->Semantic.Index > aactx->maxGeneric) { |
| aactx->maxGeneric = decl->Semantic.Index; |
| } |
| } |
| else if (decl->Declaration.File == TGSI_FILE_TEMPORARY) { |
| uint i; |
| for (i = decl->Range.First; |
| i <= decl->Range.Last; i++) { |
| /* |
| * XXX this bitfield doesn't really cut it... |
| */ |
| aactx->tempsUsed |= UINT64_C(1) << i; |
| } |
| } |
| |
| ctx->emit_declaration(ctx, decl); |
| } |
| |
| |
| /** |
| * Find the lowest zero bit, or -1 if bitfield is all ones. |
| */ |
| static int |
| free_bit(uint64_t bitfield) |
| { |
| return ffsll(~bitfield) - 1; |
| } |
| |
| |
| /** |
| * TGSI transform prolog callback. |
| */ |
| static void |
| aa_transform_prolog(struct tgsi_transform_context *ctx) |
| { |
| struct aa_transform_context *aactx = (struct aa_transform_context *) ctx; |
| uint64_t usedTemps = aactx->tempsUsed; |
| |
| /* find two free temp regs */ |
| aactx->colorTemp = free_bit(usedTemps); |
| usedTemps |= UINT64_C(1) << aactx->colorTemp; |
| aactx->aaTemp = free_bit(usedTemps); |
| assert(aactx->colorTemp >= 0); |
| assert(aactx->aaTemp >= 0); |
| |
| /* declare new generic input/texcoord */ |
| tgsi_transform_input_decl(ctx, aactx->maxInput + 1, |
| TGSI_SEMANTIC_GENERIC, aactx->maxGeneric + 1, |
| TGSI_INTERPOLATE_LINEAR); |
| |
| /* declare new temp regs */ |
| tgsi_transform_temp_decl(ctx, aactx->aaTemp); |
| tgsi_transform_temp_decl(ctx, aactx->colorTemp); |
| } |
| |
| |
| /** |
| * TGSI transform epilog callback. |
| */ |
| static void |
| aa_transform_epilog(struct tgsi_transform_context *ctx) |
| { |
| struct aa_transform_context *aactx = (struct aa_transform_context *) ctx; |
| |
| if (aactx->colorOutput != -1) { |
| struct tgsi_full_instruction inst; |
| /* insert distance-based coverage code for antialiasing. */ |
| |
| /* saturate(linewidth - fabs(interpx), linelength - fabs(interpz) */ |
| inst = tgsi_default_full_instruction(); |
| inst.Instruction.Saturate = true; |
| inst.Instruction.Opcode = TGSI_OPCODE_ADD; |
| inst.Instruction.NumDstRegs = 1; |
| tgsi_transform_dst_reg(&inst.Dst[0], TGSI_FILE_TEMPORARY, |
| aactx->aaTemp, TGSI_WRITEMASK_XZ); |
| inst.Instruction.NumSrcRegs = 2; |
| tgsi_transform_src_reg(&inst.Src[1], TGSI_FILE_INPUT, aactx->maxInput + 1, |
| TGSI_SWIZZLE_X, TGSI_SWIZZLE_X, |
| TGSI_SWIZZLE_Z, TGSI_SWIZZLE_Z); |
| tgsi_transform_src_reg(&inst.Src[0], TGSI_FILE_INPUT, aactx->maxInput + 1, |
| TGSI_SWIZZLE_Y, TGSI_SWIZZLE_Y, |
| TGSI_SWIZZLE_W, TGSI_SWIZZLE_W); |
| inst.Src[1].Register.Absolute = true; |
| inst.Src[1].Register.Negate = true; |
| ctx->emit_instruction(ctx, &inst); |
| |
| /* MUL width / height alpha */ |
| tgsi_transform_op2_swz_inst(ctx, TGSI_OPCODE_MUL, |
| TGSI_FILE_TEMPORARY, aactx->aaTemp, |
| TGSI_WRITEMASK_W, |
| TGSI_FILE_TEMPORARY, aactx->aaTemp, |
| TGSI_SWIZZLE_X, |
| TGSI_FILE_TEMPORARY, aactx->aaTemp, |
| TGSI_SWIZZLE_Z, false); |
| |
| /* MOV rgb */ |
| tgsi_transform_op1_inst(ctx, TGSI_OPCODE_MOV, |
| TGSI_FILE_OUTPUT, aactx->colorOutput, |
| TGSI_WRITEMASK_XYZ, |
| TGSI_FILE_TEMPORARY, aactx->colorTemp); |
| |
| /* MUL alpha */ |
| tgsi_transform_op2_inst(ctx, TGSI_OPCODE_MUL, |
| TGSI_FILE_OUTPUT, aactx->colorOutput, |
| TGSI_WRITEMASK_W, |
| TGSI_FILE_TEMPORARY, aactx->colorTemp, |
| TGSI_FILE_TEMPORARY, aactx->aaTemp, false); |
| } |
| } |
| |
| |
| /** |
| * TGSI instruction transform callback. |
| * Replace writes to result.color w/ a temp reg. |
| */ |
| static void |
| aa_transform_inst(struct tgsi_transform_context *ctx, |
| struct tgsi_full_instruction *inst) |
| { |
| struct aa_transform_context *aactx = (struct aa_transform_context *) ctx; |
| uint i; |
| |
| /* |
| * Look for writes to result.color and replace with colorTemp reg. |
| */ |
| for (i = 0; i < inst->Instruction.NumDstRegs; i++) { |
| struct tgsi_full_dst_register *dst = &inst->Dst[i]; |
| if (dst->Register.File == TGSI_FILE_OUTPUT && |
| dst->Register.Index == aactx->colorOutput) { |
| dst->Register.File = TGSI_FILE_TEMPORARY; |
| dst->Register.Index = aactx->colorTemp; |
| } |
| } |
| |
| ctx->emit_instruction(ctx, inst); |
| } |
| |
| |
| /** |
| * Generate the frag shader we'll use for drawing AA lines. |
| * This will be the user's shader plus some arithmetic instructions. |
| */ |
| static boolean |
| generate_aaline_fs(struct aaline_stage *aaline) |
| { |
| struct pipe_context *pipe = aaline->stage.draw->pipe; |
| const struct pipe_shader_state *orig_fs = &aaline->fs->state; |
| struct pipe_shader_state aaline_fs; |
| struct aa_transform_context transform; |
| const uint newLen = tgsi_num_tokens(orig_fs->tokens) + NUM_NEW_TOKENS; |
| |
| aaline_fs = *orig_fs; /* copy to init */ |
| aaline_fs.tokens = tgsi_alloc_tokens(newLen); |
| if (aaline_fs.tokens == NULL) |
| return FALSE; |
| |
| memset(&transform, 0, sizeof(transform)); |
| transform.colorOutput = -1; |
| transform.maxInput = -1; |
| transform.maxGeneric = -1; |
| transform.colorTemp = -1; |
| transform.aaTemp = -1; |
| transform.base.prolog = aa_transform_prolog; |
| transform.base.epilog = aa_transform_epilog; |
| transform.base.transform_instruction = aa_transform_inst; |
| transform.base.transform_declaration = aa_transform_decl; |
| |
| tgsi_transform_shader(orig_fs->tokens, |
| (struct tgsi_token *) aaline_fs.tokens, |
| newLen, &transform.base); |
| |
| #if 0 /* DEBUG */ |
| debug_printf("draw_aaline, orig shader:\n"); |
| tgsi_dump(orig_fs->tokens, 0); |
| debug_printf("draw_aaline, new shader:\n"); |
| tgsi_dump(aaline_fs.tokens, 0); |
| #endif |
| |
| aaline->fs->aaline_fs = aaline->driver_create_fs_state(pipe, &aaline_fs); |
| if (aaline->fs->aaline_fs == NULL) |
| goto fail; |
| |
| aaline->fs->generic_attrib = transform.maxGeneric + 1; |
| FREE((void *)aaline_fs.tokens); |
| return TRUE; |
| |
| fail: |
| FREE((void *)aaline_fs.tokens); |
| return FALSE; |
| } |
| |
| static boolean |
| generate_aaline_fs_nir(struct aaline_stage *aaline) |
| { |
| #ifdef LLVM_AVAILABLE |
| struct pipe_context *pipe = aaline->stage.draw->pipe; |
| const struct pipe_shader_state *orig_fs = &aaline->fs->state; |
| struct pipe_shader_state aaline_fs; |
| |
| aaline_fs = *orig_fs; /* copy to init */ |
| aaline_fs.ir.nir = nir_shader_clone(NULL, orig_fs->ir.nir); |
| if (!aaline_fs.ir.nir) |
| return FALSE; |
| |
| nir_lower_aaline_fs(aaline_fs.ir.nir, &aaline->fs->generic_attrib); |
| aaline->fs->aaline_fs = aaline->driver_create_fs_state(pipe, &aaline_fs); |
| if (aaline->fs->aaline_fs == NULL) |
| goto fail; |
| |
| return TRUE; |
| |
| fail: |
| #endif |
| return FALSE; |
| } |
| |
| /** |
| * When we're about to draw our first AA line in a batch, this function is |
| * called to tell the driver to bind our modified fragment shader. |
| */ |
| static boolean |
| bind_aaline_fragment_shader(struct aaline_stage *aaline) |
| { |
| struct draw_context *draw = aaline->stage.draw; |
| struct pipe_context *pipe = draw->pipe; |
| |
| if (!aaline->fs->aaline_fs) { |
| if (aaline->fs->state.type == PIPE_SHADER_IR_NIR) { |
| if (!generate_aaline_fs_nir(aaline)) |
| return FALSE; |
| } else |
| if (!generate_aaline_fs(aaline)) |
| return FALSE; |
| } |
| |
| draw->suspend_flushing = TRUE; |
| aaline->driver_bind_fs_state(pipe, aaline->fs->aaline_fs); |
| draw->suspend_flushing = FALSE; |
| |
| return TRUE; |
| } |
| |
| |
| |
| static inline struct aaline_stage * |
| aaline_stage(struct draw_stage *stage) |
| { |
| return (struct aaline_stage *) stage; |
| } |
| |
| |
| /** |
| * Draw a wide line by drawing a quad, using geometry which will |
| * fullfill GL's antialiased line requirements. |
| */ |
| static void |
| aaline_line(struct draw_stage *stage, struct prim_header *header) |
| { |
| const struct aaline_stage *aaline = aaline_stage(stage); |
| const float half_width = aaline->half_line_width; |
| struct prim_header tri; |
| struct vertex_header *v[8]; |
| uint coordPos = aaline->coord_slot; |
| uint posPos = aaline->pos_slot; |
| float *pos, *tex; |
| float dx = header->v[1]->data[posPos][0] - header->v[0]->data[posPos][0]; |
| float dy = header->v[1]->data[posPos][1] - header->v[0]->data[posPos][1]; |
| float a = atan2f(dy, dx); |
| float c_a = cosf(a), s_a = sinf(a); |
| float half_length; |
| float t_l, t_w; |
| uint i; |
| |
| half_length = 0.5f * sqrtf(dx * dx + dy * dy); |
| |
| if (half_length < 0.5f) { |
| /* |
| * The logic we use for "normal" sized segments is incorrect |
| * for very short segments (basically because we only have |
| * one value to interpolate, not a distance to each endpoint). |
| * Therefore, we calculate half_length differently, so that for |
| * original line length (near) 0, we get alpha 0 - otherwise |
| * max alpha would still be 0.5. This also prevents us from |
| * artifacts due to degenerated lines (the endpoints being |
| * identical, which would still receive anywhere from alpha |
| * 0-0.5 otherwise) (at least the pstipple stage may generate |
| * such lines due to float inaccuracies if line length is very |
| * close to a integer). |
| * Might not be fully accurate neither (because the "strength" of |
| * the line is going to be determined by how close to the pixel |
| * center those 1 or 2 fragments are) but it's probably the best |
| * we can do. |
| */ |
| half_length = 2.0f * half_length; |
| } else { |
| half_length = half_length + 0.5f; |
| } |
| |
| t_w = half_width; |
| t_l = 0.5f; |
| |
| /* allocate/dup new verts */ |
| for (i = 0; i < 4; i++) { |
| v[i] = dup_vert(stage, header->v[i/2], i); |
| } |
| |
| /* |
| * Quad strip for line from v0 to v1 (*=endpoints): |
| * |
| * 1 3 |
| * +-----------------------------+ |
| * | | |
| * | *v0 v1* | |
| * | | |
| * +-----------------------------+ |
| * 0 2 |
| */ |
| |
| /* |
| * We increase line length by 0.5 pixels (at each endpoint), |
| * and calculate the tri endpoints by moving them half-width |
| * distance away perpendicular to the line. |
| * XXX: since we change line endpoints (by 0.5 pixel), should |
| * actually re-interpolate all other values? |
| */ |
| |
| /* new verts */ |
| pos = v[0]->data[posPos]; |
| pos[0] += (-t_l * c_a - t_w * s_a); |
| pos[1] += (-t_l * s_a + t_w * c_a); |
| |
| pos = v[1]->data[posPos]; |
| pos[0] += (-t_l * c_a - -t_w * s_a); |
| pos[1] += (-t_l * s_a + -t_w * c_a); |
| |
| pos = v[2]->data[posPos]; |
| pos[0] += (t_l * c_a - t_w * s_a); |
| pos[1] += (t_l * s_a + t_w * c_a); |
| |
| pos = v[3]->data[posPos]; |
| pos[0] += (t_l * c_a - -t_w * s_a); |
| pos[1] += (t_l * s_a + -t_w * c_a); |
| |
| /* new texcoords */ |
| tex = v[0]->data[coordPos]; |
| ASSIGN_4V(tex, -half_width, half_width, -half_length, half_length); |
| |
| tex = v[1]->data[coordPos]; |
| ASSIGN_4V(tex, half_width, half_width, -half_length, half_length); |
| |
| tex = v[2]->data[coordPos]; |
| ASSIGN_4V(tex, -half_width, half_width, half_length, half_length); |
| |
| tex = v[3]->data[coordPos]; |
| ASSIGN_4V(tex, half_width, half_width, half_length, half_length); |
| |
| tri.v[0] = v[2]; tri.v[1] = v[1]; tri.v[2] = v[0]; |
| stage->next->tri(stage->next, &tri); |
| |
| tri.v[0] = v[3]; tri.v[1] = v[1]; tri.v[2] = v[2]; |
| stage->next->tri(stage->next, &tri); |
| } |
| |
| |
| static void |
| aaline_first_line(struct draw_stage *stage, struct prim_header *header) |
| { |
| auto struct aaline_stage *aaline = aaline_stage(stage); |
| struct draw_context *draw = stage->draw; |
| struct pipe_context *pipe = draw->pipe; |
| const struct pipe_rasterizer_state *rast = draw->rasterizer; |
| void *r; |
| |
| assert(draw->rasterizer->line_smooth && !draw->rasterizer->multisample); |
| |
| if (draw->rasterizer->line_width <= 1.0) |
| aaline->half_line_width = 1.0; |
| else |
| aaline->half_line_width = 0.5f * draw->rasterizer->line_width + 0.5f; |
| |
| if (!draw->rasterizer->half_pixel_center) |
| /* |
| * The tex coords probably would need adjustments? |
| */ |
| debug_printf("aa lines without half pixel center may be wrong\n"); |
| |
| /* |
| * Bind (generate) our fragprog |
| */ |
| if (!bind_aaline_fragment_shader(aaline)) { |
| stage->line = draw_pipe_passthrough_line; |
| stage->line(stage, header); |
| return; |
| } |
| |
| draw_aaline_prepare_outputs(draw, draw->pipeline.aaline); |
| |
| draw->suspend_flushing = TRUE; |
| |
| /* Disable triangle culling, stippling, unfilled mode etc. */ |
| r = draw_get_rasterizer_no_cull(draw, rast->scissor, rast->flatshade); |
| pipe->bind_rasterizer_state(pipe, r); |
| |
| draw->suspend_flushing = FALSE; |
| |
| /* now really draw first line */ |
| stage->line = aaline_line; |
| stage->line(stage, header); |
| } |
| |
| |
| static void |
| aaline_flush(struct draw_stage *stage, unsigned flags) |
| { |
| struct draw_context *draw = stage->draw; |
| struct aaline_stage *aaline = aaline_stage(stage); |
| struct pipe_context *pipe = draw->pipe; |
| |
| stage->line = aaline_first_line; |
| stage->next->flush(stage->next, flags); |
| |
| /* restore original frag shader */ |
| draw->suspend_flushing = TRUE; |
| aaline->driver_bind_fs_state(pipe, aaline->fs ? aaline->fs->driver_fs : NULL); |
| |
| /* restore original rasterizer state */ |
| if (draw->rast_handle) { |
| pipe->bind_rasterizer_state(pipe, draw->rast_handle); |
| } |
| |
| draw->suspend_flushing = FALSE; |
| |
| draw_remove_extra_vertex_attribs(draw); |
| } |
| |
| |
| static void |
| aaline_reset_stipple_counter(struct draw_stage *stage) |
| { |
| stage->next->reset_stipple_counter(stage->next); |
| } |
| |
| |
| static void |
| aaline_destroy(struct draw_stage *stage) |
| { |
| struct aaline_stage *aaline = aaline_stage(stage); |
| struct pipe_context *pipe = stage->draw->pipe; |
| |
| draw_free_temp_verts(stage); |
| |
| /* restore the old entry points */ |
| pipe->create_fs_state = aaline->driver_create_fs_state; |
| pipe->bind_fs_state = aaline->driver_bind_fs_state; |
| pipe->delete_fs_state = aaline->driver_delete_fs_state; |
| |
| FREE(stage); |
| } |
| |
| |
| static struct aaline_stage * |
| draw_aaline_stage(struct draw_context *draw) |
| { |
| struct aaline_stage *aaline = CALLOC_STRUCT(aaline_stage); |
| if (!aaline) |
| return NULL; |
| |
| aaline->stage.draw = draw; |
| aaline->stage.name = "aaline"; |
| aaline->stage.next = NULL; |
| aaline->stage.point = draw_pipe_passthrough_point; |
| aaline->stage.line = aaline_first_line; |
| aaline->stage.tri = draw_pipe_passthrough_tri; |
| aaline->stage.flush = aaline_flush; |
| aaline->stage.reset_stipple_counter = aaline_reset_stipple_counter; |
| aaline->stage.destroy = aaline_destroy; |
| |
| if (!draw_alloc_temp_verts(&aaline->stage, 8)) |
| goto fail; |
| |
| return aaline; |
| |
| fail: |
| aaline->stage.destroy(&aaline->stage); |
| |
| return NULL; |
| } |
| |
| |
| static struct aaline_stage * |
| aaline_stage_from_pipe(struct pipe_context *pipe) |
| { |
| struct draw_context *draw = (struct draw_context *) pipe->draw; |
| |
| if (draw) { |
| return aaline_stage(draw->pipeline.aaline); |
| } else { |
| return NULL; |
| } |
| } |
| |
| |
| /** |
| * This function overrides the driver's create_fs_state() function and |
| * will typically be called by the gallium frontend. |
| */ |
| static void * |
| aaline_create_fs_state(struct pipe_context *pipe, |
| const struct pipe_shader_state *fs) |
| { |
| struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); |
| struct aaline_fragment_shader *aafs = NULL; |
| |
| if (!aaline) |
| return NULL; |
| |
| aafs = CALLOC_STRUCT(aaline_fragment_shader); |
| |
| if (!aafs) |
| return NULL; |
| |
| aafs->state.type = fs->type; |
| if (fs->type == PIPE_SHADER_IR_TGSI) |
| aafs->state.tokens = tgsi_dup_tokens(fs->tokens); |
| #ifdef LLVM_AVAILABLE |
| else |
| aafs->state.ir.nir = nir_shader_clone(NULL, fs->ir.nir); |
| #endif |
| |
| /* pass-through */ |
| aafs->driver_fs = aaline->driver_create_fs_state(pipe, fs); |
| |
| return aafs; |
| } |
| |
| |
| static void |
| aaline_bind_fs_state(struct pipe_context *pipe, void *fs) |
| { |
| struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); |
| struct aaline_fragment_shader *aafs = (struct aaline_fragment_shader *) fs; |
| |
| if (!aaline) { |
| return; |
| } |
| |
| /* save current */ |
| aaline->fs = aafs; |
| /* pass-through */ |
| aaline->driver_bind_fs_state(pipe, (aafs ? aafs->driver_fs : NULL)); |
| } |
| |
| |
| static void |
| aaline_delete_fs_state(struct pipe_context *pipe, void *fs) |
| { |
| struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); |
| struct aaline_fragment_shader *aafs = (struct aaline_fragment_shader *) fs; |
| |
| if (!aafs) { |
| return; |
| } |
| |
| if (aaline) { |
| /* pass-through */ |
| aaline->driver_delete_fs_state(pipe, aafs->driver_fs); |
| |
| if (aafs->aaline_fs) |
| aaline->driver_delete_fs_state(pipe, aafs->aaline_fs); |
| } |
| |
| if (aafs->state.type == PIPE_SHADER_IR_TGSI) |
| FREE((void*)aafs->state.tokens); |
| else |
| ralloc_free(aafs->state.ir.nir); |
| FREE(aafs); |
| } |
| |
| |
| void |
| draw_aaline_prepare_outputs(struct draw_context *draw, |
| struct draw_stage *stage) |
| { |
| struct aaline_stage *aaline = aaline_stage(stage); |
| const struct pipe_rasterizer_state *rast = draw->rasterizer; |
| |
| /* update vertex attrib info */ |
| aaline->pos_slot = draw_current_shader_position_output(draw); |
| |
| if (!rast->line_smooth || rast->multisample) |
| return; |
| |
| /* allocate the extra post-transformed vertex attribute */ |
| if (aaline->fs && aaline->fs->aaline_fs) |
| aaline->coord_slot = draw_alloc_extra_vertex_attrib(draw, |
| TGSI_SEMANTIC_GENERIC, |
| aaline->fs->generic_attrib); |
| else |
| aaline->coord_slot = -1; |
| } |
| |
| /** |
| * Called by drivers that want to install this AA line prim stage |
| * into the draw module's pipeline. This will not be used if the |
| * hardware has native support for AA lines. |
| */ |
| boolean |
| draw_install_aaline_stage(struct draw_context *draw, struct pipe_context *pipe) |
| { |
| struct aaline_stage *aaline; |
| |
| pipe->draw = (void *) draw; |
| |
| /* |
| * Create / install AA line drawing / prim stage |
| */ |
| aaline = draw_aaline_stage(draw); |
| if (!aaline) |
| return FALSE; |
| |
| /* save original driver functions */ |
| aaline->driver_create_fs_state = pipe->create_fs_state; |
| aaline->driver_bind_fs_state = pipe->bind_fs_state; |
| aaline->driver_delete_fs_state = pipe->delete_fs_state; |
| |
| /* override the driver's functions */ |
| pipe->create_fs_state = aaline_create_fs_state; |
| pipe->bind_fs_state = aaline_bind_fs_state; |
| pipe->delete_fs_state = aaline_delete_fs_state; |
| |
| /* Install once everything is known to be OK: |
| */ |
| draw->pipeline.aaline = &aaline->stage; |
| |
| return TRUE; |
| } |