reactos/dll/opengl/mesa/src/mesa/state_tracker/st_atom_pixeltransfer.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /*
  29  * Generate fragment programs to implement pixel transfer ops, such as
  30  * scale/bias, colortable, convolution...
  31  *
  32  * Authors:
  33  *   Brian Paul
  34  */
  35
  36 #include "main/imports.h"
  37 #include "main/image.h"
  38 #include "main/macros.h"
  39 #include "program/program.h"
  40 #include "program/prog_cache.h"
  41 #include "program/prog_instruction.h"
  42 #include "program/prog_parameter.h"
  43 #include "program/prog_print.h"
  44
  45 #include "st_context.h"
  46 #include "st_format.h"
  47 #include "st_texture.h"
  48
  49 #include "pipe/p_screen.h"
  50 #include "pipe/p_context.h"
  51 #include "util/u_inlines.h"
  52 #include "util/u_pack_color.h"
  53
  54
  55 struct state_key
  56 {
  57    GLuint scaleAndBias:1;
  58    GLuint pixelMaps:1;
  59
  60 #if 0
  61    GLfloat Maps[3][256][4];
  62    int NumMaps;
  63    GLint NumStages;
  64    pipeline_stage Stages[STAGE_MAX];
  65    GLboolean StagesUsed[STAGE_MAX];
  66    GLfloat Scale1[4], Bias1[4];
  67    GLfloat Scale2[4], Bias2[4];
  68 #endif
  69 };
  70
  71 static void
  72 make_state_key(struct gl_context *ctx,  struct state_key *key)
  73 {
  74    memset(key, 0, sizeof(*key));
  75
  76    if (ctx->Pixel.RedBias != 0.0 || ctx->Pixel.RedScale != 1.0 ||
  77        ctx->Pixel.GreenBias != 0.0 || ctx->Pixel.GreenScale != 1.0 ||
  78        ctx->Pixel.BlueBias != 0.0 || ctx->Pixel.BlueScale != 1.0 ||
  79        ctx->Pixel.AlphaBias != 0.0 || ctx->Pixel.AlphaScale != 1.0) {
  80       key->scaleAndBias = 1;
  81    }
  82
  83    key->pixelMaps = ctx->Pixel.MapColorFlag;
  84 }
  85
  86
  87 /**
  88  * Update the pixelmap texture with the contents of the R/G/B/A pixel maps.
  89  */
  90 static void
  91 load_color_map_texture(struct gl_context *ctx, struct pipe_resource *pt)
  92 {
  93    struct st_context *st = st_context(ctx);
  94    struct pipe_context *pipe = st->pipe;
  95    struct pipe_transfer *transfer;
  96    const GLuint rSize = ctx->PixelMaps.RtoR.Size;
  97    const GLuint gSize = ctx->PixelMaps.GtoG.Size;
  98    const GLuint bSize = ctx->PixelMaps.BtoB.Size;
  99    const GLuint aSize = ctx->PixelMaps.AtoA.Size;
 100    const uint texSize = pt->width0;
 101    uint *dest;
 102    uint i, j;
 103
 104    transfer = pipe_get_transfer(pipe,
 105                                 pt, 0, 0, PIPE_TRANSFER_WRITE,
 106                                 0, 0, texSize, texSize);
 107    dest = (uint *) pipe_transfer_map(pipe, transfer);
 108
 109    /* Pack four 1D maps into a 2D texture:
 110     * R map is placed horizontally, indexed by S, in channel 0
 111     * G map is placed vertically, indexed by T, in channel 1
 112     * B map is placed horizontally, indexed by S, in channel 2
 113     * A map is placed vertically, indexed by T, in channel 3
 114     */
 115    for (i = 0; i < texSize; i++) {
 116       for (j = 0; j < texSize; j++) {
 117          union util_color uc;
 118          int k = (i * texSize + j);
 119          ubyte r = ctx->PixelMaps.RtoR.Map8[j * rSize / texSize];
 120          ubyte g = ctx->PixelMaps.GtoG.Map8[i * gSize / texSize];
 121          ubyte b = ctx->PixelMaps.BtoB.Map8[j * bSize / texSize];
 122          ubyte a = ctx->PixelMaps.AtoA.Map8[i * aSize / texSize];
 123          util_pack_color_ub(r, g, b, a, pt->format, &uc);
 124          *(dest + k) = uc.ui;
 125       }
 126    }
 127
 128    pipe_transfer_unmap(pipe, transfer);
 129    pipe->transfer_destroy(pipe, transfer);
 130 }
 131
 132
 133
 134 #define MAX_INST 100
 135
 136 /**
 137  * Returns a fragment program which implements the current pixel transfer ops.
 138  */
 139 static struct gl_fragment_program *
 140 get_pixel_transfer_program(struct gl_context *ctx, const struct state_key *key)
 141 {
 142    struct st_context *st = st_context(ctx);
 143    struct prog_instruction inst[MAX_INST];
 144    struct gl_program_parameter_list *params;
 145    struct gl_fragment_program *fp;
 146    GLuint ic = 0;
 147    const GLuint colorTemp = 0;
 148
 149    fp = (struct gl_fragment_program *)
 150       ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0);
 151    if (!fp)
 152       return NULL;
 153
 154    params = _mesa_new_parameter_list();
 155
 156    /*
 157     * Get initial pixel color from the texture.
 158     * TEX colorTemp, fragment.texcoord[0], texture[0], 2D;
 159     */
 160    _mesa_init_instructions(inst + ic, 1);
 161    inst[ic].Opcode = OPCODE_TEX;
 162    inst[ic].DstReg.File = PROGRAM_TEMPORARY;
 163    inst[ic].DstReg.Index = colorTemp;
 164    inst[ic].SrcReg[0].File = PROGRAM_INPUT;
 165    inst[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0;
 166    inst[ic].TexSrcUnit = 0;
 167    inst[ic].TexSrcTarget = TEXTURE_2D_INDEX;
 168    ic++;
 169    fp->Base.InputsRead = BITFIELD64_BIT(FRAG_ATTRIB_TEX0);
 170    fp->Base.OutputsWritten = BITFIELD64_BIT(FRAG_RESULT_COLOR);
 171    fp->Base.SamplersUsed = 0x1;  /* sampler 0 (bit 0) is used */
 172
 173    if (key->scaleAndBias) {
 174       static const gl_state_index scale_state[STATE_LENGTH] =
 175          { STATE_INTERNAL, STATE_PT_SCALE, 0, 0, 0 };
 176       static const gl_state_index bias_state[STATE_LENGTH] =
 177          { STATE_INTERNAL, STATE_PT_BIAS, 0, 0, 0 };
 178       GLint scale_p, bias_p;
 179
 180       scale_p = _mesa_add_state_reference(params, scale_state);
 181       bias_p = _mesa_add_state_reference(params, bias_state);
 182
 183       /* MAD colorTemp, colorTemp, scale, bias; */
 184       _mesa_init_instructions(inst + ic, 1);
 185       inst[ic].Opcode = OPCODE_MAD;
 186       inst[ic].DstReg.File = PROGRAM_TEMPORARY;
 187       inst[ic].DstReg.Index = colorTemp;
 188       inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
 189       inst[ic].SrcReg[0].Index = colorTemp;
 190       inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
 191       inst[ic].SrcReg[1].Index = scale_p;
 192       inst[ic].SrcReg[2].File = PROGRAM_STATE_VAR;
 193       inst[ic].SrcReg[2].Index = bias_p;
 194       ic++;
 195    }
 196
 197    if (key->pixelMaps) {
 198       const GLuint temp = 1;
 199
 200       /* create the colormap/texture now if not already done */
 201       if (!st->pixel_xfer.pixelmap_texture) {
 202          st->pixel_xfer.pixelmap_texture = st_create_color_map_texture(ctx);
 203          st->pixel_xfer.pixelmap_sampler_view =
 204             st_create_texture_sampler_view(st->pipe,
 205                                            st->pixel_xfer.pixelmap_texture);
 206       }
 207
 208       /* with a little effort, we can do four pixel map look-ups with
 209        * two TEX instructions:
 210        */
 211
 212       /* TEX temp.rg, colorTemp.rgba, texture[1], 2D; */
 213       _mesa_init_instructions(inst + ic, 1);
 214       inst[ic].Opcode = OPCODE_TEX;
 215       inst[ic].DstReg.File = PROGRAM_TEMPORARY;
 216       inst[ic].DstReg.Index = temp;
 217       inst[ic].DstReg.WriteMask = WRITEMASK_XY; /* write R,G */
 218       inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
 219       inst[ic].SrcReg[0].Index = colorTemp;
 220       inst[ic].TexSrcUnit = 1;
 221       inst[ic].TexSrcTarget = TEXTURE_2D_INDEX;
 222       ic++;
 223
 224       /* TEX temp.ba, colorTemp.baba, texture[1], 2D; */
 225       _mesa_init_instructions(inst + ic, 1);
 226       inst[ic].Opcode = OPCODE_TEX;
 227       inst[ic].DstReg.File = PROGRAM_TEMPORARY;
 228       inst[ic].DstReg.Index = temp;
 229       inst[ic].DstReg.WriteMask = WRITEMASK_ZW; /* write B,A */
 230       inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
 231       inst[ic].SrcReg[0].Index = colorTemp;
 232       inst[ic].SrcReg[0].Swizzle = MAKE_SWIZZLE4(SWIZZLE_Z, SWIZZLE_W,
 233                                                  SWIZZLE_Z, SWIZZLE_W);
 234       inst[ic].TexSrcUnit = 1;
 235       inst[ic].TexSrcTarget = TEXTURE_2D_INDEX;
 236       ic++;
 237
 238       /* MOV colorTemp, temp; */
 239       _mesa_init_instructions(inst + ic, 1);
 240       inst[ic].Opcode = OPCODE_MOV;
 241       inst[ic].DstReg.File = PROGRAM_TEMPORARY;
 242       inst[ic].DstReg.Index = colorTemp;
 243       inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
 244       inst[ic].SrcReg[0].Index = temp;
 245       ic++;
 246
 247       fp->Base.SamplersUsed |= (1 << 1);  /* sampler 1 is used */
 248    }
 249
 250    /* Modify last instruction's dst reg to write to result.color */
 251    {
 252       struct prog_instruction *last = &inst[ic - 1];
 253       last->DstReg.File = PROGRAM_OUTPUT;
 254       last->DstReg.Index = FRAG_RESULT_COLOR;
 255    }
 256
 257    /* END; */
 258    _mesa_init_instructions(inst + ic, 1);
 259    inst[ic].Opcode = OPCODE_END;
 260    ic++;
 261
 262    assert(ic <= MAX_INST);
 263
 264
 265    fp->Base.Instructions = _mesa_alloc_instructions(ic);
 266    if (!fp->Base.Instructions) {
 267       _mesa_error(ctx, GL_OUT_OF_MEMORY,
 268                   "generating pixel transfer program");
 269       _mesa_free_parameter_list(params);
 270       return NULL;
 271    }
 272
 273    _mesa_copy_instructions(fp->Base.Instructions, inst, ic);
 274    fp->Base.NumInstructions = ic;
 275    fp->Base.Parameters = params;
 276
 277 #if 0
 278    printf("========= pixel transfer prog\n");
 279    _mesa_print_program(&fp->Base);
 280    _mesa_print_parameter_list(fp->Base.Parameters);
 281 #endif
 282
 283    return fp;
 284 }
 285
 286
 287
 288 /**
 289  * Update st->pixel_xfer.program in response to new pixel-transfer state.
 290  */
 291 static void
 292 update_pixel_transfer(struct st_context *st)
 293 {
 294    struct gl_context *ctx = st->ctx;
 295    struct state_key key;
 296    struct gl_fragment_program *fp;
 297
 298    make_state_key(st->ctx, &key);
 299
 300    fp = (struct gl_fragment_program *)
 301       _mesa_search_program_cache(st->pixel_xfer.cache, &key, sizeof(key));
 302    if (!fp) {
 303       fp = get_pixel_transfer_program(st->ctx, &key);
 304       _mesa_program_cache_insert(st->ctx, st->pixel_xfer.cache,
 305                                  &key, sizeof(key), &fp->Base);
 306    }
 307
 308    if (ctx->Pixel.MapColorFlag) {
 309       load_color_map_texture(ctx, st->pixel_xfer.pixelmap_texture);
 310    }
 311    st->pixel_xfer.pixelmap_enabled = ctx->Pixel.MapColorFlag;
 312
 313    st->pixel_xfer.program = (struct st_fragment_program *) fp;
 314 }
 315
 316
 317
 318 const struct st_tracked_state st_update_pixel_transfer = {
 319    "st_update_pixel_transfer",                          /* name */
 320    {                                                    /* dirty */
 321       _NEW_PIXEL,                                       /* mesa */
 322       0,                                                /* st */
 323    },
 324    update_pixel_transfer                                /* update */
 325 };