/************************************************************************** * * 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, 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 */ };