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| /************************************************************************** |
| * |
| * Copyright 2007 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. |
| * |
| **************************************************************************/ |
| |
| /* |
| * Generate fragment programs to implement pixel transfer ops, such as |
| * scale/bias, colortable, convolution... |
| * |
| * Authors: |
| * Brian Paul |
| */ |
| |
| #include "main/imports.h" |
| #include "main/image.h" |
| #include "main/macros.h" |
| #include "program/program.h" |
| #include "program/prog_cache.h" |
| #include "program/prog_instruction.h" |
| #include "program/prog_parameter.h" |
| #include "program/prog_print.h" |
| |
| #include "st_context.h" |
| #include "st_format.h" |
| #include "st_texture.h" |
| |
| #include "pipe/p_screen.h" |
| #include "pipe/p_context.h" |
| #include "util/u_inlines.h" |
| #include "util/u_pack_color.h" |
| |
| |
| struct state_key |
| { |
| GLuint scaleAndBias:1; |
| GLuint pixelMaps:1; |
| |
| #if 0 |
| GLfloat Maps[3][256][4]; |
| int NumMaps; |
| GLint NumStages; |
| pipeline_stage Stages[STAGE_MAX]; |
| GLboolean StagesUsed[STAGE_MAX]; |
| GLfloat Scale1[4], Bias1[4]; |
| GLfloat Scale2[4], Bias2[4]; |
| #endif |
| }; |
| |
| static void |
| make_state_key(struct gl_context *ctx, struct state_key *key) |
| { |
| memset(key, 0, sizeof(*key)); |
| |
| if (ctx->Pixel.RedBias != 0.0 || ctx->Pixel.RedScale != 1.0 || |
| ctx->Pixel.GreenBias != 0.0 || ctx->Pixel.GreenScale != 1.0 || |
| ctx->Pixel.BlueBias != 0.0 || ctx->Pixel.BlueScale != 1.0 || |
| ctx->Pixel.AlphaBias != 0.0 || ctx->Pixel.AlphaScale != 1.0) { |
| key->scaleAndBias = 1; |
| } |
| |
| key->pixelMaps = ctx->Pixel.MapColorFlag; |
| } |
| |
| |
| static struct pipe_resource * |
| create_color_map_texture(struct gl_context *ctx) |
| { |
| struct st_context *st = st_context(ctx); |
| struct pipe_context *pipe = st->pipe; |
| struct pipe_resource *pt; |
| enum pipe_format format; |
| const uint texSize = 256; /* simple, and usually perfect */ |
| |
| /* find an RGBA texture format */ |
| format = st_choose_format(pipe->screen, GL_RGBA, |
| PIPE_TEXTURE_2D, 0, PIPE_BIND_SAMPLER_VIEW); |
| |
| /* create texture for color map/table */ |
| pt = st_texture_create(st, PIPE_TEXTURE_2D, format, 0, |
| texSize, texSize, 1, PIPE_BIND_SAMPLER_VIEW); |
| return pt; |
| } |
| |
| |
| /** |
| * Update the pixelmap texture with the contents of the R/G/B/A pixel maps. |
| */ |
| static void |
| load_color_map_texture(struct gl_context *ctx, struct pipe_resource *pt) |
| { |
| struct st_context *st = st_context(ctx); |
| struct pipe_context *pipe = st->pipe; |
| struct pipe_transfer *transfer; |
| const GLuint rSize = ctx->PixelMaps.RtoR.Size; |
| const GLuint gSize = ctx->PixelMaps.GtoG.Size; |
| const GLuint bSize = ctx->PixelMaps.BtoB.Size; |
| const GLuint aSize = ctx->PixelMaps.AtoA.Size; |
| const uint texSize = pt->width0; |
| uint *dest; |
| uint i, j; |
| |
| transfer = pipe_get_transfer(st_context(ctx)->pipe, |
| pt, 0, 0, PIPE_TRANSFER_WRITE, |
| 0, 0, texSize, texSize); |
| dest = (uint *) pipe_transfer_map(pipe, transfer); |
| |
| /* Pack four 1D maps into a 2D texture: |
| * R map is placed horizontally, indexed by S, in channel 0 |
| * G map is placed vertically, indexed by T, in channel 1 |
| * B map is placed horizontally, indexed by S, in channel 2 |
| * A map is placed vertically, indexed by T, in channel 3 |
| */ |
| for (i = 0; i < texSize; i++) { |
| for (j = 0; j < texSize; j++) { |
| union util_color uc; |
| int k = (i * texSize + j); |
| ubyte r = ctx->PixelMaps.RtoR.Map8[j * rSize / texSize]; |
| ubyte g = ctx->PixelMaps.GtoG.Map8[i * gSize / texSize]; |
| ubyte b = ctx->PixelMaps.BtoB.Map8[j * bSize / texSize]; |
| ubyte a = ctx->PixelMaps.AtoA.Map8[i * aSize / texSize]; |
| util_pack_color_ub(r, g, b, a, pt->format, &uc); |
| *(dest + k) = uc.ui; |
| } |
| } |
| |
| pipe_transfer_unmap(pipe, transfer); |
| pipe->transfer_destroy(pipe, transfer); |
| } |
| |
| |
| |
| #define MAX_INST 100 |
| |
| /** |
| * Returns a fragment program which implements the current pixel transfer ops. |
| */ |
| static struct gl_fragment_program * |
| get_pixel_transfer_program(struct gl_context *ctx, const struct state_key *key) |
| { |
| struct st_context *st = st_context(ctx); |
| struct prog_instruction inst[MAX_INST]; |
| struct gl_program_parameter_list *params; |
| struct gl_fragment_program *fp; |
| GLuint ic = 0; |
| const GLuint colorTemp = 0; |
| |
| fp = (struct gl_fragment_program *) |
| ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0); |
| if (!fp) |
| return NULL; |
| |
| params = _mesa_new_parameter_list(); |
| |
| /* |
| * Get initial pixel color from the texture. |
| * TEX colorTemp, fragment.texcoord[0], texture[0], 2D; |
| */ |
| _mesa_init_instructions(inst + ic, 1); |
| inst[ic].Opcode = OPCODE_TEX; |
| inst[ic].DstReg.File = PROGRAM_TEMPORARY; |
| inst[ic].DstReg.Index = colorTemp; |
| inst[ic].SrcReg[0].File = PROGRAM_INPUT; |
| inst[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0; |
| inst[ic].TexSrcUnit = 0; |
| inst[ic].TexSrcTarget = TEXTURE_2D_INDEX; |
| ic++; |
| fp->Base.InputsRead = (1 << FRAG_ATTRIB_TEX0); |
| fp->Base.OutputsWritten = (1 << FRAG_RESULT_COLOR); |
| fp->Base.SamplersUsed = 0x1; /* sampler 0 (bit 0) is used */ |
| |
| if (key->scaleAndBias) { |
| static const gl_state_index scale_state[STATE_LENGTH] = |
| { STATE_INTERNAL, STATE_PT_SCALE, 0, 0, 0 }; |
| static const gl_state_index bias_state[STATE_LENGTH] = |
| { STATE_INTERNAL, STATE_PT_BIAS, 0, 0, 0 }; |
| GLfloat scale[4], bias[4]; |
| GLint scale_p, bias_p; |
| |
| scale[0] = ctx->Pixel.RedScale; |
| scale[1] = ctx->Pixel.GreenScale; |
| scale[2] = ctx->Pixel.BlueScale; |
| scale[3] = ctx->Pixel.AlphaScale; |
| bias[0] = ctx->Pixel.RedBias; |
| bias[1] = ctx->Pixel.GreenBias; |
| bias[2] = ctx->Pixel.BlueBias; |
| bias[3] = ctx->Pixel.AlphaBias; |
| |
| scale_p = _mesa_add_state_reference(params, scale_state); |
| bias_p = _mesa_add_state_reference(params, bias_state); |
| |
| /* MAD colorTemp, colorTemp, scale, bias; */ |
| _mesa_init_instructions(inst + ic, 1); |
| inst[ic].Opcode = OPCODE_MAD; |
| inst[ic].DstReg.File = PROGRAM_TEMPORARY; |
| inst[ic].DstReg.Index = colorTemp; |
| inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY; |
| inst[ic].SrcReg[0].Index = colorTemp; |
| inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR; |
| inst[ic].SrcReg[1].Index = scale_p; |
| inst[ic].SrcReg[2].File = PROGRAM_STATE_VAR; |
| inst[ic].SrcReg[2].Index = bias_p; |
| ic++; |
| } |
| |
| if (key->pixelMaps) { |
| const GLuint temp = 1; |
| |
| /* create the colormap/texture now if not already done */ |
| if (!st->pixel_xfer.pixelmap_texture) { |
| st->pixel_xfer.pixelmap_texture = create_color_map_texture(ctx); |
| st->pixel_xfer.pixelmap_sampler_view = |
| st_create_texture_sampler_view(st->pipe, |
| st->pixel_xfer.pixelmap_texture); |
| } |
| |
| /* with a little effort, we can do four pixel map look-ups with |
| * two TEX instructions: |
| */ |
| |
| /* TEX temp.rg, colorTemp.rgba, texture[1], 2D; */ |
| _mesa_init_instructions(inst + ic, 1); |
| inst[ic].Opcode = OPCODE_TEX; |
| inst[ic].DstReg.File = PROGRAM_TEMPORARY; |
| inst[ic].DstReg.Index = temp; |
| inst[ic].DstReg.WriteMask = WRITEMASK_XY; /* write R,G */ |
| inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY; |
| inst[ic].SrcReg[0].Index = colorTemp; |
| inst[ic].TexSrcUnit = 1; |
| inst[ic].TexSrcTarget = TEXTURE_2D_INDEX; |
| ic++; |
| |
| /* TEX temp.ba, colorTemp.baba, texture[1], 2D; */ |
| _mesa_init_instructions(inst + ic, 1); |
| inst[ic].Opcode = OPCODE_TEX; |
| inst[ic].DstReg.File = PROGRAM_TEMPORARY; |
| inst[ic].DstReg.Index = temp; |
| inst[ic].DstReg.WriteMask = WRITEMASK_ZW; /* write B,A */ |
| inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY; |
| inst[ic].SrcReg[0].Index = colorTemp; |
| inst[ic].SrcReg[0].Swizzle = MAKE_SWIZZLE4(SWIZZLE_Z, SWIZZLE_W, |
| SWIZZLE_Z, SWIZZLE_W); |
| inst[ic].TexSrcUnit = 1; |
| inst[ic].TexSrcTarget = TEXTURE_2D_INDEX; |
| ic++; |
| |
| /* MOV colorTemp, temp; */ |
| _mesa_init_instructions(inst + ic, 1); |
| inst[ic].Opcode = OPCODE_MOV; |
| inst[ic].DstReg.File = PROGRAM_TEMPORARY; |
| inst[ic].DstReg.Index = colorTemp; |
| inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY; |
| inst[ic].SrcReg[0].Index = temp; |
| ic++; |
| |
| fp->Base.SamplersUsed |= (1 << 1); /* sampler 1 is used */ |
| } |
| |
| /* Modify last instruction's dst reg to write to result.color */ |
| { |
| struct prog_instruction *last = &inst[ic - 1]; |
| last->DstReg.File = PROGRAM_OUTPUT; |
| last->DstReg.Index = FRAG_RESULT_COLOR; |
| } |
| |
| /* END; */ |
| _mesa_init_instructions(inst + ic, 1); |
| inst[ic].Opcode = OPCODE_END; |
| ic++; |
| |
| assert(ic <= MAX_INST); |
| |
| |
| fp->Base.Instructions = _mesa_alloc_instructions(ic); |
| if (!fp->Base.Instructions) { |
| _mesa_error(ctx, GL_OUT_OF_MEMORY, |
| "generating pixel transfer program"); |
| return NULL; |
| } |
| |
| _mesa_copy_instructions(fp->Base.Instructions, inst, ic); |
| fp->Base.NumInstructions = ic; |
| fp->Base.Parameters = params; |
| |
| #if 0 |
| printf("========= pixel transfer prog\n"); |
| _mesa_print_program(&fp->Base); |
| _mesa_print_parameter_list(fp->Base.Parameters); |
| #endif |
| |
| return fp; |
| } |
| |
| |
| |
| /** |
| * Update st->pixel_xfer.program in response to new pixel-transfer state. |
| */ |
| static void |
| update_pixel_transfer(struct st_context *st) |
| { |
| struct gl_context *ctx = st->ctx; |
| struct state_key key; |
| struct gl_fragment_program *fp; |
| |
| make_state_key(st->ctx, &key); |
| |
| fp = (struct gl_fragment_program *) |
| _mesa_search_program_cache(st->pixel_xfer.cache, &key, sizeof(key)); |
| if (!fp) { |
| fp = get_pixel_transfer_program(st->ctx, &key); |
| _mesa_program_cache_insert(st->ctx, st->pixel_xfer.cache, |
| &key, sizeof(key), &fp->Base); |
| } |
| |
| if (ctx->Pixel.MapColorFlag) { |
| load_color_map_texture(ctx, st->pixel_xfer.pixelmap_texture); |
| } |
| st->pixel_xfer.pixelmap_enabled = ctx->Pixel.MapColorFlag; |
| |
| st->pixel_xfer.program = (struct st_fragment_program *) fp; |
| } |
| |
| |
| |
| const struct st_tracked_state st_update_pixel_transfer = { |
| "st_update_pixel_transfer", /* name */ |
| { /* dirty */ |
| _NEW_PIXEL, /* mesa */ |
| 0, /* st */ |
| }, |
| update_pixel_transfer /* update */ |
| }; |