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| /************************************************************************** |
| * |
| * 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. |
| * |
| **************************************************************************/ |
| |
| /** |
| * AA point stage: AA points are converted to quads and rendered with a |
| * special fragment shader. Another approach would be to use a texture |
| * map image of a point, but experiments indicate the quality isn't nearly |
| * as good as this approach. |
| * |
| * Note: this looks a lot like draw_aaline.c but there's actually little |
| * if any code that can be shared. |
| * |
| * Authors: Brian Paul |
| */ |
| |
| |
| #include "pipe/p_context.h" |
| #include "pipe/p_defines.h" |
| #include "pipe/p_shader_tokens.h" |
| |
| #include "tgsi/tgsi_transform.h" |
| #include "tgsi/tgsi_dump.h" |
| |
| #include "util/u_math.h" |
| #include "util/u_memory.h" |
| |
| #include "draw_context.h" |
| #include "draw_vs.h" |
| #include "draw_pipe.h" |
| |
| |
| /** Approx number of new tokens for instructions in aa_transform_inst() */ |
| #define NUM_NEW_TOKENS 200 |
| |
| |
| /* |
| * Enabling NORMALIZE might give _slightly_ better results. |
| * Basically, it controls whether we compute distance as d=sqrt(x*x+y*y) or |
| * d=x*x+y*y. Since we're working with a unit circle, the later seems |
| * close enough and saves some costly instructions. |
| */ |
| #define NORMALIZE 0 |
| |
| |
| /** |
| * Subclass of pipe_shader_state to carry extra fragment shader info. |
| */ |
| struct aapoint_fragment_shader |
| { |
| struct pipe_shader_state state; |
| void *driver_fs; /**< the regular shader */ |
| void *aapoint_fs; /**< the aa point-augmented shader */ |
| int generic_attrib; /**< The generic input attrib/texcoord we'll use */ |
| }; |
| |
| |
| /** |
| * Subclass of draw_stage |
| */ |
| struct aapoint_stage |
| { |
| struct draw_stage stage; |
| |
| /** half of pipe_rasterizer_state::point_size */ |
| float radius; |
| |
| /** vertex attrib slot containing point size */ |
| int psize_slot; |
| |
| /** this is the vertex attrib slot for the new texcoords */ |
| uint tex_slot; |
| |
| /** vertex attrib slot containing position */ |
| uint pos_slot; |
| |
| /** Currently bound fragment shader */ |
| struct aapoint_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; |
| uint tempsUsed; /**< bitmask */ |
| int colorOutput; /**< which output is the primary color */ |
| int maxInput, maxGeneric; /**< max input index found */ |
| int tmp0, colorTemp; /**< temp registers */ |
| boolean firstInstruction; |
| }; |
| |
| |
| /** |
| * TGSI declaration transform callback. |
| * Look for two free temp regs and available input reg for new texcoords. |
| */ |
| 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++) { |
| aactx->tempsUsed |= (1 << i); |
| } |
| } |
| |
| ctx->emit_declaration(ctx, decl); |
| } |
| |
| |
| /** |
| * TGSI instruction transform callback. |
| * Replace writes to result.color w/ a temp reg. |
| * Upon END instruction, insert texture sampling code for antialiasing. |
| */ |
| 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; |
| struct tgsi_full_instruction newInst; |
| |
| if (aactx->firstInstruction) { |
| /* emit our new declarations before the first instruction */ |
| |
| struct tgsi_full_declaration decl; |
| const int texInput = aactx->maxInput + 1; |
| int tmp0; |
| uint i; |
| |
| /* find two free temp regs */ |
| for (i = 0; i < 32; i++) { |
| if ((aactx->tempsUsed & (1 << i)) == 0) { |
| /* found a free temp */ |
| if (aactx->tmp0 < 0) |
| aactx->tmp0 = i; |
| else if (aactx->colorTemp < 0) |
| aactx->colorTemp = i; |
| else |
| break; |
| } |
| } |
| |
| assert(aactx->colorTemp != aactx->tmp0); |
| |
| tmp0 = aactx->tmp0; |
| |
| /* declare new generic input/texcoord */ |
| decl = tgsi_default_full_declaration(); |
| decl.Declaration.File = TGSI_FILE_INPUT; |
| /* XXX this could be linear... */ |
| decl.Declaration.Interpolate = 1; |
| decl.Declaration.Semantic = 1; |
| decl.Semantic.Name = TGSI_SEMANTIC_GENERIC; |
| decl.Semantic.Index = aactx->maxGeneric + 1; |
| decl.Range.First = |
| decl.Range.Last = texInput; |
| decl.Interp.Interpolate = TGSI_INTERPOLATE_PERSPECTIVE; |
| ctx->emit_declaration(ctx, &decl); |
| |
| /* declare new temp regs */ |
| decl = tgsi_default_full_declaration(); |
| decl.Declaration.File = TGSI_FILE_TEMPORARY; |
| decl.Range.First = |
| decl.Range.Last = tmp0; |
| ctx->emit_declaration(ctx, &decl); |
| |
| decl = tgsi_default_full_declaration(); |
| decl.Declaration.File = TGSI_FILE_TEMPORARY; |
| decl.Range.First = |
| decl.Range.Last = aactx->colorTemp; |
| ctx->emit_declaration(ctx, &decl); |
| |
| aactx->firstInstruction = FALSE; |
| |
| |
| /* |
| * Emit code to compute fragment coverage, kill if outside point radius |
| * |
| * Temp reg0 usage: |
| * t0.x = distance of fragment from center point |
| * t0.y = boolean, is t0.x > 1.0, also misc temp usage |
| * t0.z = temporary for computing 1/(1-k) value |
| * t0.w = final coverage value |
| */ |
| |
| /* MUL t0.xy, tex, tex; # compute x^2, y^2 */ |
| newInst = tgsi_default_full_instruction(); |
| newInst.Instruction.Opcode = TGSI_OPCODE_MUL; |
| newInst.Instruction.NumDstRegs = 1; |
| newInst.Dst[0].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Dst[0].Register.Index = tmp0; |
| newInst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XY; |
| newInst.Instruction.NumSrcRegs = 2; |
| newInst.Src[0].Register.File = TGSI_FILE_INPUT; |
| newInst.Src[0].Register.Index = texInput; |
| newInst.Src[1].Register.File = TGSI_FILE_INPUT; |
| newInst.Src[1].Register.Index = texInput; |
| ctx->emit_instruction(ctx, &newInst); |
| |
| /* ADD t0.x, t0.x, t0.y; # x^2 + y^2 */ |
| newInst = tgsi_default_full_instruction(); |
| newInst.Instruction.Opcode = TGSI_OPCODE_ADD; |
| newInst.Instruction.NumDstRegs = 1; |
| newInst.Dst[0].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Dst[0].Register.Index = tmp0; |
| newInst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_X; |
| newInst.Instruction.NumSrcRegs = 2; |
| newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Src[0].Register.Index = tmp0; |
| newInst.Src[0].Register.SwizzleX = TGSI_SWIZZLE_X; |
| newInst.Src[1].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Src[1].Register.Index = tmp0; |
| newInst.Src[1].Register.SwizzleX = TGSI_SWIZZLE_Y; |
| ctx->emit_instruction(ctx, &newInst); |
| |
| #if NORMALIZE /* OPTIONAL normalization of length */ |
| /* RSQ t0.x, t0.x; */ |
| newInst = tgsi_default_full_instruction(); |
| newInst.Instruction.Opcode = TGSI_OPCODE_RSQ; |
| newInst.Instruction.NumDstRegs = 1; |
| newInst.Dst[0].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Dst[0].Register.Index = tmp0; |
| newInst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_X; |
| newInst.Instruction.NumSrcRegs = 1; |
| newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Src[0].Register.Index = tmp0; |
| ctx->emit_instruction(ctx, &newInst); |
| |
| /* RCP t0.x, t0.x; */ |
| newInst = tgsi_default_full_instruction(); |
| newInst.Instruction.Opcode = TGSI_OPCODE_RCP; |
| newInst.Instruction.NumDstRegs = 1; |
| newInst.Dst[0].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Dst[0].Register.Index = tmp0; |
| newInst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_X; |
| newInst.Instruction.NumSrcRegs = 1; |
| newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Src[0].Register.Index = tmp0; |
| ctx->emit_instruction(ctx, &newInst); |
| #endif |
| |
| /* SGT t0.y, t0.xxxx, tex.wwww; # bool b = d > 1 (NOTE tex.w == 1) */ |
| newInst = tgsi_default_full_instruction(); |
| newInst.Instruction.Opcode = TGSI_OPCODE_SGT; |
| newInst.Instruction.NumDstRegs = 1; |
| newInst.Dst[0].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Dst[0].Register.Index = tmp0; |
| newInst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_Y; |
| newInst.Instruction.NumSrcRegs = 2; |
| newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Src[0].Register.Index = tmp0; |
| newInst.Src[0].Register.SwizzleY = TGSI_SWIZZLE_X; |
| newInst.Src[1].Register.File = TGSI_FILE_INPUT; |
| newInst.Src[1].Register.Index = texInput; |
| newInst.Src[1].Register.SwizzleY = TGSI_SWIZZLE_W; |
| ctx->emit_instruction(ctx, &newInst); |
| |
| /* KIL -tmp0.yyyy; # if -tmp0.y < 0, KILL */ |
| newInst = tgsi_default_full_instruction(); |
| newInst.Instruction.Opcode = TGSI_OPCODE_KIL; |
| newInst.Instruction.NumDstRegs = 0; |
| newInst.Instruction.NumSrcRegs = 1; |
| newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Src[0].Register.Index = tmp0; |
| newInst.Src[0].Register.SwizzleX = TGSI_SWIZZLE_Y; |
| newInst.Src[0].Register.SwizzleY = TGSI_SWIZZLE_Y; |
| newInst.Src[0].Register.SwizzleZ = TGSI_SWIZZLE_Y; |
| newInst.Src[0].Register.SwizzleW = TGSI_SWIZZLE_Y; |
| newInst.Src[0].Register.Negate = 1; |
| ctx->emit_instruction(ctx, &newInst); |
| |
| |
| /* compute coverage factor = (1-d)/(1-k) */ |
| |
| /* SUB t0.z, tex.w, tex.z; # m = 1 - k */ |
| newInst = tgsi_default_full_instruction(); |
| newInst.Instruction.Opcode = TGSI_OPCODE_SUB; |
| newInst.Instruction.NumDstRegs = 1; |
| newInst.Dst[0].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Dst[0].Register.Index = tmp0; |
| newInst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_Z; |
| newInst.Instruction.NumSrcRegs = 2; |
| newInst.Src[0].Register.File = TGSI_FILE_INPUT; |
| newInst.Src[0].Register.Index = texInput; |
| newInst.Src[0].Register.SwizzleZ = TGSI_SWIZZLE_W; |
| newInst.Src[1].Register.File = TGSI_FILE_INPUT; |
| newInst.Src[1].Register.Index = texInput; |
| newInst.Src[1].Register.SwizzleZ = TGSI_SWIZZLE_Z; |
| ctx->emit_instruction(ctx, &newInst); |
| |
| /* RCP t0.z, t0.z; # t0.z = 1 / m */ |
| newInst = tgsi_default_full_instruction(); |
| newInst.Instruction.Opcode = TGSI_OPCODE_RCP; |
| newInst.Instruction.NumDstRegs = 1; |
| newInst.Dst[0].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Dst[0].Register.Index = tmp0; |
| newInst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_Z; |
| newInst.Instruction.NumSrcRegs = 1; |
| newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Src[0].Register.Index = tmp0; |
| newInst.Src[0].Register.SwizzleX = TGSI_SWIZZLE_Z; |
| ctx->emit_instruction(ctx, &newInst); |
| |
| /* SUB t0.y, 1, t0.x; # d = 1 - d */ |
| newInst = tgsi_default_full_instruction(); |
| newInst.Instruction.Opcode = TGSI_OPCODE_SUB; |
| newInst.Instruction.NumDstRegs = 1; |
| newInst.Dst[0].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Dst[0].Register.Index = tmp0; |
| newInst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_Y; |
| newInst.Instruction.NumSrcRegs = 2; |
| newInst.Src[0].Register.File = TGSI_FILE_INPUT; |
| newInst.Src[0].Register.Index = texInput; |
| newInst.Src[0].Register.SwizzleY = TGSI_SWIZZLE_W; |
| newInst.Src[1].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Src[1].Register.Index = tmp0; |
| newInst.Src[1].Register.SwizzleY = TGSI_SWIZZLE_X; |
| ctx->emit_instruction(ctx, &newInst); |
| |
| /* MUL t0.w, t0.y, t0.z; # coverage = d * m */ |
| newInst = tgsi_default_full_instruction(); |
| newInst.Instruction.Opcode = TGSI_OPCODE_MUL; |
| newInst.Instruction.NumDstRegs = 1; |
| newInst.Dst[0].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Dst[0].Register.Index = tmp0; |
| newInst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_W; |
| newInst.Instruction.NumSrcRegs = 2; |
| newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Src[0].Register.Index = tmp0; |
| newInst.Src[0].Register.SwizzleW = TGSI_SWIZZLE_Y; |
| newInst.Src[1].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Src[1].Register.Index = tmp0; |
| newInst.Src[1].Register.SwizzleW = TGSI_SWIZZLE_Z; |
| ctx->emit_instruction(ctx, &newInst); |
| |
| /* SLE t0.y, t0.x, tex.z; # bool b = distance <= k */ |
| newInst = tgsi_default_full_instruction(); |
| newInst.Instruction.Opcode = TGSI_OPCODE_SLE; |
| newInst.Instruction.NumDstRegs = 1; |
| newInst.Dst[0].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Dst[0].Register.Index = tmp0; |
| newInst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_Y; |
| newInst.Instruction.NumSrcRegs = 2; |
| newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Src[0].Register.Index = tmp0; |
| newInst.Src[0].Register.SwizzleY = TGSI_SWIZZLE_X; |
| newInst.Src[1].Register.File = TGSI_FILE_INPUT; |
| newInst.Src[1].Register.Index = texInput; |
| newInst.Src[1].Register.SwizzleY = TGSI_SWIZZLE_Z; |
| ctx->emit_instruction(ctx, &newInst); |
| |
| /* CMP t0.w, -t0.y, tex.w, t0.w; |
| * # if -t0.y < 0 then |
| * t0.w = 1 |
| * else |
| * t0.w = t0.w |
| */ |
| newInst = tgsi_default_full_instruction(); |
| newInst.Instruction.Opcode = TGSI_OPCODE_CMP; |
| newInst.Instruction.NumDstRegs = 1; |
| newInst.Dst[0].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Dst[0].Register.Index = tmp0; |
| newInst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_W; |
| newInst.Instruction.NumSrcRegs = 3; |
| newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Src[0].Register.Index = tmp0; |
| newInst.Src[0].Register.SwizzleX = TGSI_SWIZZLE_Y; |
| newInst.Src[0].Register.SwizzleY = TGSI_SWIZZLE_Y; |
| newInst.Src[0].Register.SwizzleZ = TGSI_SWIZZLE_Y; |
| newInst.Src[0].Register.SwizzleW = TGSI_SWIZZLE_Y; |
| newInst.Src[0].Register.Negate = 1; |
| newInst.Src[1].Register.File = TGSI_FILE_INPUT; |
| newInst.Src[1].Register.Index = texInput; |
| newInst.Src[1].Register.SwizzleX = TGSI_SWIZZLE_W; |
| newInst.Src[1].Register.SwizzleY = TGSI_SWIZZLE_W; |
| newInst.Src[1].Register.SwizzleZ = TGSI_SWIZZLE_W; |
| newInst.Src[1].Register.SwizzleW = TGSI_SWIZZLE_W; |
| newInst.Src[2].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Src[2].Register.Index = tmp0; |
| newInst.Src[2].Register.SwizzleX = TGSI_SWIZZLE_W; |
| newInst.Src[2].Register.SwizzleY = TGSI_SWIZZLE_W; |
| newInst.Src[2].Register.SwizzleZ = TGSI_SWIZZLE_W; |
| newInst.Src[2].Register.SwizzleW = TGSI_SWIZZLE_W; |
| ctx->emit_instruction(ctx, &newInst); |
| |
| } |
| |
| if (inst->Instruction.Opcode == TGSI_OPCODE_END) { |
| /* add alpha modulation code at tail of program */ |
| |
| /* MOV result.color.xyz, colorTemp; */ |
| newInst = tgsi_default_full_instruction(); |
| newInst.Instruction.Opcode = TGSI_OPCODE_MOV; |
| newInst.Instruction.NumDstRegs = 1; |
| newInst.Dst[0].Register.File = TGSI_FILE_OUTPUT; |
| newInst.Dst[0].Register.Index = aactx->colorOutput; |
| newInst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZ; |
| newInst.Instruction.NumSrcRegs = 1; |
| newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Src[0].Register.Index = aactx->colorTemp; |
| ctx->emit_instruction(ctx, &newInst); |
| |
| /* MUL result.color.w, colorTemp, tmp0.w; */ |
| newInst = tgsi_default_full_instruction(); |
| newInst.Instruction.Opcode = TGSI_OPCODE_MUL; |
| newInst.Instruction.NumDstRegs = 1; |
| newInst.Dst[0].Register.File = TGSI_FILE_OUTPUT; |
| newInst.Dst[0].Register.Index = aactx->colorOutput; |
| newInst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_W; |
| newInst.Instruction.NumSrcRegs = 2; |
| newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Src[0].Register.Index = aactx->colorTemp; |
| newInst.Src[1].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Src[1].Register.Index = aactx->tmp0; |
| ctx->emit_instruction(ctx, &newInst); |
| } |
| else { |
| /* Not an END instruction. |
| * Look for writes to result.color and replace with colorTemp reg. |
| */ |
| uint i; |
| |
| 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 points. |
| * This will be the user's shader plus some texture/modulate instructions. |
| */ |
| static boolean |
| generate_aapoint_fs(struct aapoint_stage *aapoint) |
| { |
| const struct pipe_shader_state *orig_fs = &aapoint->fs->state; |
| struct pipe_shader_state aapoint_fs; |
| struct aa_transform_context transform; |
| const uint newLen = tgsi_num_tokens(orig_fs->tokens) + NUM_NEW_TOKENS; |
| struct pipe_context *pipe = aapoint->stage.draw->pipe; |
| |
| aapoint_fs = *orig_fs; /* copy to init */ |
| aapoint_fs.tokens = tgsi_alloc_tokens(newLen); |
| if (aapoint_fs.tokens == NULL) |
| return FALSE; |
| |
| memset(&transform, 0, sizeof(transform)); |
| transform.colorOutput = -1; |
| transform.maxInput = -1; |
| transform.maxGeneric = -1; |
| transform.colorTemp = -1; |
| transform.tmp0 = -1; |
| transform.firstInstruction = TRUE; |
| transform.base.transform_instruction = aa_transform_inst; |
| transform.base.transform_declaration = aa_transform_decl; |
| |
| tgsi_transform_shader(orig_fs->tokens, |
| (struct tgsi_token *) aapoint_fs.tokens, |
| newLen, &transform.base); |
| |
| #if 0 /* DEBUG */ |
| debug_printf("draw_aapoint, orig shader:\n"); |
| tgsi_dump(orig_fs->tokens, 0); |
| debug_printf("draw_aapoint, new shader:\n"); |
| tgsi_dump(aapoint_fs.tokens, 0); |
| #endif |
| |
| aapoint->fs->aapoint_fs |
| = aapoint->driver_create_fs_state(pipe, &aapoint_fs); |
| if (aapoint->fs->aapoint_fs == NULL) |
| goto fail; |
| |
| aapoint->fs->generic_attrib = transform.maxGeneric + 1; |
| FREE((void *)aapoint_fs.tokens); |
| return TRUE; |
| |
| fail: |
| FREE((void *)aapoint_fs.tokens); |
| return FALSE; |
| } |
| |
| |
| /** |
| * When we're about to draw our first AA point in a batch, this function is |
| * called to tell the driver to bind our modified fragment shader. |
| */ |
| static boolean |
| bind_aapoint_fragment_shader(struct aapoint_stage *aapoint) |
| { |
| struct draw_context *draw = aapoint->stage.draw; |
| struct pipe_context *pipe = draw->pipe; |
| |
| if (!aapoint->fs->aapoint_fs && |
| !generate_aapoint_fs(aapoint)) |
| return FALSE; |
| |
| draw->suspend_flushing = TRUE; |
| aapoint->driver_bind_fs_state(pipe, aapoint->fs->aapoint_fs); |
| draw->suspend_flushing = FALSE; |
| |
| return TRUE; |
| } |
| |
| |
| |
| static INLINE struct aapoint_stage * |
| aapoint_stage( struct draw_stage *stage ) |
| { |
| return (struct aapoint_stage *) stage; |
| } |
| |
| |
| |
| |
| /** |
| * Draw an AA point by drawing a quad. |
| */ |
| static void |
| aapoint_point(struct draw_stage *stage, struct prim_header *header) |
| { |
| const struct aapoint_stage *aapoint = aapoint_stage(stage); |
| struct prim_header tri; |
| struct vertex_header *v[4]; |
| const uint tex_slot = aapoint->tex_slot; |
| const uint pos_slot = aapoint->pos_slot; |
| float radius, *pos, *tex; |
| uint i; |
| float k; |
| |
| if (aapoint->psize_slot >= 0) { |
| radius = 0.5f * header->v[0]->data[aapoint->psize_slot][0]; |
| } |
| else { |
| radius = aapoint->radius; |
| } |
| |
| /* |
| * Note: the texcoords (generic attrib, really) we use are special: |
| * The S and T components simply vary from -1 to +1. |
| * The R component is k, below. |
| * The Q component is 1.0 and will used as a handy constant in the |
| * fragment shader. |
| */ |
| |
| /* |
| * k is the threshold distance from the point's center at which |
| * we begin alpha attenuation (the coverage value). |
| * Operating within a unit circle, we'll compute the fragment's |
| * distance 'd' from the center point using the texcoords. |
| * IF d > 1.0 THEN |
| * KILL fragment |
| * ELSE IF d > k THEN |
| * compute coverage in [0,1] proportional to d in [k, 1]. |
| * ELSE |
| * coverage = 1.0; // full coverage |
| * ENDIF |
| * |
| * Note: the ELSEIF and ELSE clauses are actually implemented with CMP to |
| * avoid using IF/ELSE/ENDIF TGSI opcodes. |
| */ |
| |
| #if !NORMALIZE |
| k = 1.0f / radius; |
| k = 1.0f - 2.0f * k + k * k; |
| #else |
| k = 1.0f - 1.0f / radius; |
| #endif |
| |
| /* allocate/dup new verts */ |
| for (i = 0; i < 4; i++) { |
| v[i] = dup_vert(stage, header->v[0], i); |
| } |
| |
| /* new verts */ |
| pos = v[0]->data[pos_slot]; |
| pos[0] -= radius; |
| pos[1] -= radius; |
| |
| pos = v[1]->data[pos_slot]; |
| pos[0] += radius; |
| pos[1] -= radius; |
| |
| pos = v[2]->data[pos_slot]; |
| pos[0] += radius; |
| pos[1] += radius; |
| |
| pos = v[3]->data[pos_slot]; |
| pos[0] -= radius; |
| pos[1] += radius; |
| |
| /* new texcoords */ |
| tex = v[0]->data[tex_slot]; |
| ASSIGN_4V(tex, -1, -1, k, 1); |
| |
| tex = v[1]->data[tex_slot]; |
| ASSIGN_4V(tex, 1, -1, k, 1); |
| |
| tex = v[2]->data[tex_slot]; |
| ASSIGN_4V(tex, 1, 1, k, 1); |
| |
| tex = v[3]->data[tex_slot]; |
| ASSIGN_4V(tex, -1, 1, k, 1); |
| |
| /* emit 2 tris for the quad strip */ |
| tri.v[0] = v[0]; |
| tri.v[1] = v[1]; |
| tri.v[2] = v[2]; |
| stage->next->tri( stage->next, &tri ); |
| |
| tri.v[0] = v[0]; |
| tri.v[1] = v[2]; |
| tri.v[2] = v[3]; |
| stage->next->tri( stage->next, &tri ); |
| } |
| |
| |
| static void |
| aapoint_first_point(struct draw_stage *stage, struct prim_header *header) |
| { |
| auto struct aapoint_stage *aapoint = aapoint_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->point_smooth); |
| |
| if (draw->rasterizer->point_size <= 2.0) |
| aapoint->radius = 1.0; |
| else |
| aapoint->radius = 0.5f * draw->rasterizer->point_size; |
| |
| /* |
| * Bind (generate) our fragprog. |
| */ |
| bind_aapoint_fragment_shader(aapoint); |
| |
| /* update vertex attrib info */ |
| aapoint->pos_slot = draw_current_shader_position_output(draw); |
| |
| /* allocate the extra post-transformed vertex attribute */ |
| aapoint->tex_slot = draw_alloc_extra_vertex_attrib(draw, |
| TGSI_SEMANTIC_GENERIC, |
| aapoint->fs->generic_attrib); |
| assert(aapoint->tex_slot > 0); /* output[0] is vertex pos */ |
| |
| /* find psize slot in post-transform vertex */ |
| aapoint->psize_slot = -1; |
| if (draw->rasterizer->point_size_per_vertex) { |
| const struct tgsi_shader_info *info = draw_get_shader_info(draw); |
| uint i; |
| /* find PSIZ vertex output */ |
| for (i = 0; i < info->num_outputs; i++) { |
| if (info->output_semantic_name[i] == TGSI_SEMANTIC_PSIZE) { |
| aapoint->psize_slot = i; |
| break; |
| } |
| } |
| } |
| |
| 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 point */ |
| stage->point = aapoint_point; |
| stage->point(stage, header); |
| } |
| |
| |
| static void |
| aapoint_flush(struct draw_stage *stage, unsigned flags) |
| { |
| struct draw_context *draw = stage->draw; |
| struct aapoint_stage *aapoint = aapoint_stage(stage); |
| struct pipe_context *pipe = draw->pipe; |
| |
| stage->point = aapoint_first_point; |
| stage->next->flush( stage->next, flags ); |
| |
| /* restore original frag shader */ |
| draw->suspend_flushing = TRUE; |
| aapoint->driver_bind_fs_state(pipe, aapoint->fs ? aapoint->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 |
| aapoint_reset_stipple_counter(struct draw_stage *stage) |
| { |
| stage->next->reset_stipple_counter( stage->next ); |
| } |
| |
| |
| static void |
| aapoint_destroy(struct draw_stage *stage) |
| { |
| struct aapoint_stage* aapoint = aapoint_stage(stage); |
| struct pipe_context *pipe = stage->draw->pipe; |
| |
| draw_free_temp_verts( stage ); |
| |
| /* restore the old entry points */ |
| pipe->create_fs_state = aapoint->driver_create_fs_state; |
| pipe->bind_fs_state = aapoint->driver_bind_fs_state; |
| pipe->delete_fs_state = aapoint->driver_delete_fs_state; |
| |
| FREE( stage ); |
| } |
| |
| |
| static struct aapoint_stage * |
| draw_aapoint_stage(struct draw_context *draw) |
| { |
| struct aapoint_stage *aapoint = CALLOC_STRUCT(aapoint_stage); |
| if (aapoint == NULL) |
| goto fail; |
| |
| aapoint->stage.draw = draw; |
| aapoint->stage.name = "aapoint"; |
| aapoint->stage.next = NULL; |
| aapoint->stage.point = aapoint_first_point; |
| aapoint->stage.line = draw_pipe_passthrough_line; |
| aapoint->stage.tri = draw_pipe_passthrough_tri; |
| aapoint->stage.flush = aapoint_flush; |
| aapoint->stage.reset_stipple_counter = aapoint_reset_stipple_counter; |
| aapoint->stage.destroy = aapoint_destroy; |
| |
| if (!draw_alloc_temp_verts( &aapoint->stage, 4 )) |
| goto fail; |
| |
| return aapoint; |
| |
| fail: |
| if (aapoint) |
| aapoint->stage.destroy(&aapoint->stage); |
| |
| return NULL; |
| |
| } |
| |
| |
| static struct aapoint_stage * |
| aapoint_stage_from_pipe(struct pipe_context *pipe) |
| { |
| struct draw_context *draw = (struct draw_context *) pipe->draw; |
| return aapoint_stage(draw->pipeline.aapoint); |
| } |
| |
| |
| /** |
| * This function overrides the driver's create_fs_state() function and |
| * will typically be called by the state tracker. |
| */ |
| static void * |
| aapoint_create_fs_state(struct pipe_context *pipe, |
| const struct pipe_shader_state *fs) |
| { |
| struct aapoint_stage *aapoint = aapoint_stage_from_pipe(pipe); |
| struct aapoint_fragment_shader *aafs = CALLOC_STRUCT(aapoint_fragment_shader); |
| if (aafs == NULL) |
| return NULL; |
| |
| aafs->state.tokens = tgsi_dup_tokens(fs->tokens); |
| |
| /* pass-through */ |
| aafs->driver_fs = aapoint->driver_create_fs_state(pipe, fs); |
| |
| return aafs; |
| } |
| |
| |
| static void |
| aapoint_bind_fs_state(struct pipe_context *pipe, void *fs) |
| { |
| struct aapoint_stage *aapoint = aapoint_stage_from_pipe(pipe); |
| struct aapoint_fragment_shader *aafs = (struct aapoint_fragment_shader *) fs; |
| /* save current */ |
| aapoint->fs = aafs; |
| /* pass-through */ |
| aapoint->driver_bind_fs_state(pipe, |
| (aafs ? aafs->driver_fs : NULL)); |
| } |
| |
| |
| static void |
| aapoint_delete_fs_state(struct pipe_context *pipe, void *fs) |
| { |
| struct aapoint_stage *aapoint = aapoint_stage_from_pipe(pipe); |
| struct aapoint_fragment_shader *aafs = (struct aapoint_fragment_shader *) fs; |
| |
| /* pass-through */ |
| aapoint->driver_delete_fs_state(pipe, aafs->driver_fs); |
| |
| if (aafs->aapoint_fs) |
| aapoint->driver_delete_fs_state(pipe, aafs->aapoint_fs); |
| |
| FREE((void*)aafs->state.tokens); |
| |
| FREE(aafs); |
| } |
| |
| |
| /** |
| * Called by drivers that want to install this AA point prim stage |
| * into the draw module's pipeline. This will not be used if the |
| * hardware has native support for AA points. |
| */ |
| boolean |
| draw_install_aapoint_stage(struct draw_context *draw, |
| struct pipe_context *pipe) |
| { |
| struct aapoint_stage *aapoint; |
| |
| pipe->draw = (void *) draw; |
| |
| /* |
| * Create / install AA point drawing / prim stage |
| */ |
| aapoint = draw_aapoint_stage( draw ); |
| if (aapoint == NULL) |
| return FALSE; |
| |
| /* save original driver functions */ |
| aapoint->driver_create_fs_state = pipe->create_fs_state; |
| aapoint->driver_bind_fs_state = pipe->bind_fs_state; |
| aapoint->driver_delete_fs_state = pipe->delete_fs_state; |
| |
| /* override the driver's functions */ |
| pipe->create_fs_state = aapoint_create_fs_state; |
| pipe->bind_fs_state = aapoint_bind_fs_state; |
| pipe->delete_fs_state = aapoint_delete_fs_state; |
| |
| draw->pipeline.aapoint = &aapoint->stage; |
| |
| return TRUE; |
| } |