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, colormatrix, 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 "shader/program.h"
  40 #include "shader/prog_instruction.h"
  41 #include "shader/prog_parameter.h"
  42 #include "shader/prog_print.h"
  43
  44 #include "st_context.h"
  45 #include "st_format.h"
  46 #include "st_texture.h"
  47 #include "st_inlines.h"
  48
  49 #include "pipe/p_screen.h"
  50 #include "pipe/p_context.h"
  51 #include "util/u_pack_color.h"
  52
  53
  54 struct state_key
  55 {
  56    GLuint scaleAndBias:1;
  57    GLuint colorMatrix:1;
  58    GLuint colorMatrixPostScaleBias:1;
  59    GLuint pixelMaps:1;
  60
  61 #if 0
  62    GLfloat Maps[3][256][4];
  63    int NumMaps;
  64    GLint NumStages;
  65    pipeline_stage Stages[STAGE_MAX];
  66    GLboolean StagesUsed[STAGE_MAX];
  67    GLfloat Scale1[4], Bias1[4];
  68    GLfloat Scale2[4], Bias2[4];
  69 #endif
  70 };
  71
  72
  73 static GLboolean
  74 is_identity(const GLfloat m[16])
  75 {
  76    GLuint i;
  77    for (i = 0; i < 16; i++) {
  78       const int row = i % 4, col = i / 4;
  79       const float val = (GLfloat)(row == col);
  80       if (m[i] != val)
  81          return GL_FALSE;
  82    }
  83    return GL_TRUE;
  84 }
  85
  86
  87 static void
  88 make_state_key(GLcontext *ctx,  struct state_key *key)
  89 {
  90    static const GLfloat zero[4] = { 0.0f, 0.0f, 0.0f, 0.0f };
  91    static const GLfloat one[4] = { 1.0f, 1.0f, 1.0f, 1.0f };
  92
  93    memset(key, 0, sizeof(*key));
  94
  95    if (ctx->Pixel.RedBias != 0.0 || ctx->Pixel.RedScale != 1.0 ||
  96        ctx->Pixel.GreenBias != 0.0 || ctx->Pixel.GreenScale != 1.0 ||
  97        ctx->Pixel.BlueBias != 0.0 || ctx->Pixel.BlueScale != 1.0 ||
  98        ctx->Pixel.AlphaBias != 0.0 || ctx->Pixel.AlphaScale != 1.0) {
  99       key->scaleAndBias = 1;
 100    }
 101
 102    if (!is_identity(ctx->ColorMatrixStack.Top->m)) {
 103       key->colorMatrix = 1;
 104    }
 105
 106    if (!TEST_EQ_4V(ctx->Pixel.PostColorMatrixScale, one) ||
 107        !TEST_EQ_4V(ctx->Pixel.PostColorMatrixBias, zero)) {
 108       key->colorMatrixPostScaleBias = 1;
 109    }
 110
 111    key->pixelMaps = ctx->Pixel.MapColorFlag;
 112 }
 113
 114
 115 static struct pipe_resource *
 116 create_color_map_texture(GLcontext *ctx)
 117 {
 118    struct st_context *st = st_context(ctx);
 119    struct pipe_context *pipe = st->pipe;
 120    struct pipe_resource *pt;
 121    enum pipe_format format;
 122    const uint texSize = 256; /* simple, and usually perfect */
 123
 124    /* find an RGBA texture format */
 125    format = st_choose_format(pipe->screen, GL_RGBA,
 126                              PIPE_TEXTURE_2D, PIPE_BIND_SAMPLER_VIEW);
 127
 128    /* create texture for color map/table */
 129    pt = st_texture_create(st, PIPE_TEXTURE_2D, format, 0,
 130                           texSize, texSize, 1, PIPE_BIND_SAMPLER_VIEW);
 131    return pt;
 132 }
 133
 134
 135 /**
 136  * Update the pixelmap texture with the contents of the R/G/B/A pixel maps.
 137  */
 138 static void
 139 load_color_map_texture(GLcontext *ctx, struct pipe_resource *pt)
 140 {
 141    struct st_context *st = st_context(ctx);
 142    struct pipe_context *pipe = st->pipe;
 143    struct pipe_transfer *transfer;
 144    const GLuint rSize = ctx->PixelMaps.RtoR.Size;
 145    const GLuint gSize = ctx->PixelMaps.GtoG.Size;
 146    const GLuint bSize = ctx->PixelMaps.BtoB.Size;
 147    const GLuint aSize = ctx->PixelMaps.AtoA.Size;
 148    const uint texSize = pt->width0;
 149    uint *dest;
 150    uint i, j;
 151
 152    transfer = st_cond_flush_get_tex_transfer(st_context(ctx),
 153                                              pt, 0, 0, 0, PIPE_TRANSFER_WRITE,
 154                                              0, 0, texSize, texSize);
 155    dest = (uint *) pipe_transfer_map(pipe, transfer);
 156
 157    /* Pack four 1D maps into a 2D texture:
 158     * R map is placed horizontally, indexed by S, in channel 0
 159     * G map is placed vertically, indexed by T, in channel 1
 160     * B map is placed horizontally, indexed by S, in channel 2
 161     * A map is placed vertically, indexed by T, in channel 3
 162     */
 163    for (i = 0; i < texSize; i++) {
 164       for (j = 0; j < texSize; j++) {
 165          union util_color uc;
 166          int k = (i * texSize + j);
 167          ubyte r = ctx->PixelMaps.RtoR.Map8[j * rSize / texSize];
 168          ubyte g = ctx->PixelMaps.GtoG.Map8[i * gSize / texSize];
 169          ubyte b = ctx->PixelMaps.BtoB.Map8[j * bSize / texSize];
 170          ubyte a = ctx->PixelMaps.AtoA.Map8[i * aSize / texSize];
 171          util_pack_color_ub(r, g, b, a, pt->format, &uc);
 172          *(dest + k) = uc.ui;
 173       }
 174    }
 175
 176    pipe_transfer_unmap(pipe, transfer);
 177    pipe->transfer_destroy(pipe, transfer);
 178 }
 179
 180
 181
 182 #define MAX_INST 100
 183
 184 /**
 185  * Returns a fragment program which implements the current pixel transfer ops.
 186  */
 187 static struct gl_fragment_program *
 188 get_pixel_transfer_program(GLcontext *ctx, const struct state_key *key)
 189 {
 190    struct st_context *st = st_context(ctx);
 191    struct prog_instruction inst[MAX_INST];
 192    struct gl_program_parameter_list *params;
 193    struct gl_fragment_program *fp;
 194    GLuint ic = 0;
 195    const GLuint colorTemp = 0;
 196
 197    fp = (struct gl_fragment_program *)
 198       ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0);
 199    if (!fp)
 200       return NULL;
 201
 202    params = _mesa_new_parameter_list();
 203
 204    /*
 205     * Get initial pixel color from the texture.
 206     * TEX colorTemp, fragment.texcoord[0], texture[0], 2D;
 207     */
 208    _mesa_init_instructions(inst + ic, 1);
 209    inst[ic].Opcode = OPCODE_TEX;
 210    inst[ic].DstReg.File = PROGRAM_TEMPORARY;
 211    inst[ic].DstReg.Index = colorTemp;
 212    inst[ic].SrcReg[0].File = PROGRAM_INPUT;
 213    inst[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0;
 214    inst[ic].TexSrcUnit = 0;
 215    inst[ic].TexSrcTarget = TEXTURE_2D_INDEX;
 216    ic++;
 217    fp->Base.InputsRead = (1 << FRAG_ATTRIB_TEX0);
 218    fp->Base.OutputsWritten = (1 << FRAG_RESULT_COLOR);
 219    fp->Base.SamplersUsed = 0x1;  /* sampler 0 (bit 0) is used */
 220
 221    if (key->scaleAndBias) {
 222       static const gl_state_index scale_state[STATE_LENGTH] =
 223          { STATE_INTERNAL, STATE_PT_SCALE, 0, 0, 0 };
 224       static const gl_state_index bias_state[STATE_LENGTH] =
 225          { STATE_INTERNAL, STATE_PT_BIAS, 0, 0, 0 };
 226       GLfloat scale[4], bias[4];
 227       GLint scale_p, bias_p;
 228
 229       scale[0] = ctx->Pixel.RedScale;
 230       scale[1] = ctx->Pixel.GreenScale;
 231       scale[2] = ctx->Pixel.BlueScale;
 232       scale[3] = ctx->Pixel.AlphaScale;
 233       bias[0] = ctx->Pixel.RedBias;
 234       bias[1] = ctx->Pixel.GreenBias;
 235       bias[2] = ctx->Pixel.BlueBias;
 236       bias[3] = ctx->Pixel.AlphaBias;
 237
 238       scale_p = _mesa_add_state_reference(params, scale_state);
 239       bias_p = _mesa_add_state_reference(params, bias_state);
 240
 241       /* MAD colorTemp, colorTemp, scale, bias; */
 242       _mesa_init_instructions(inst + ic, 1);
 243       inst[ic].Opcode = OPCODE_MAD;
 244       inst[ic].DstReg.File = PROGRAM_TEMPORARY;
 245       inst[ic].DstReg.Index = colorTemp;
 246       inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
 247       inst[ic].SrcReg[0].Index = colorTemp;
 248       inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
 249       inst[ic].SrcReg[1].Index = scale_p;
 250       inst[ic].SrcReg[2].File = PROGRAM_STATE_VAR;
 251       inst[ic].SrcReg[2].Index = bias_p;
 252       ic++;
 253    }
 254
 255    if (key->pixelMaps) {
 256       const GLuint temp = 1;
 257
 258       /* create the colormap/texture now if not already done */
 259       if (!st->pixel_xfer.pixelmap_texture) {
 260          st->pixel_xfer.pixelmap_texture = create_color_map_texture(ctx);
 261          st->pixel_xfer.pixelmap_sampler_view =
 262             st_create_texture_sampler_view(st->pipe,
 263                                            st->pixel_xfer.pixelmap_texture);
 264       }
 265
 266       /* with a little effort, we can do four pixel map look-ups with
 267        * two TEX instructions:
 268        */
 269
 270       /* TEX temp.rg, colorTemp.rgba, texture[1], 2D; */
 271       _mesa_init_instructions(inst + ic, 1);
 272       inst[ic].Opcode = OPCODE_TEX;
 273       inst[ic].DstReg.File = PROGRAM_TEMPORARY;
 274       inst[ic].DstReg.Index = temp;
 275       inst[ic].DstReg.WriteMask = WRITEMASK_XY; /* write R,G */
 276       inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
 277       inst[ic].SrcReg[0].Index = colorTemp;
 278       inst[ic].TexSrcUnit = 1;
 279       inst[ic].TexSrcTarget = TEXTURE_2D_INDEX;
 280       ic++;
 281
 282       /* TEX temp.ba, colorTemp.baba, texture[1], 2D; */
 283       _mesa_init_instructions(inst + ic, 1);
 284       inst[ic].Opcode = OPCODE_TEX;
 285       inst[ic].DstReg.File = PROGRAM_TEMPORARY;
 286       inst[ic].DstReg.Index = temp;
 287       inst[ic].DstReg.WriteMask = WRITEMASK_ZW; /* write B,A */
 288       inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
 289       inst[ic].SrcReg[0].Index = colorTemp;
 290       inst[ic].SrcReg[0].Swizzle = MAKE_SWIZZLE4(SWIZZLE_Z, SWIZZLE_W,
 291                                                  SWIZZLE_Z, SWIZZLE_W);
 292       inst[ic].TexSrcUnit = 1;
 293       inst[ic].TexSrcTarget = TEXTURE_2D_INDEX;
 294       ic++;
 295
 296       /* MOV colorTemp, temp; */
 297       _mesa_init_instructions(inst + ic, 1);
 298       inst[ic].Opcode = OPCODE_MOV;
 299       inst[ic].DstReg.File = PROGRAM_TEMPORARY;
 300       inst[ic].DstReg.Index = colorTemp;
 301       inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
 302       inst[ic].SrcReg[0].Index = temp;
 303       ic++;
 304
 305       fp->Base.SamplersUsed |= (1 << 1);  /* sampler 1 is used */
 306    }
 307
 308    if (key->colorMatrix) {
 309       static const gl_state_index row0_state[STATE_LENGTH] =
 310          { STATE_COLOR_MATRIX, 0, 0, 0, 0 };
 311       static const gl_state_index row1_state[STATE_LENGTH] =
 312          { STATE_COLOR_MATRIX, 0, 1, 1, 0 };
 313       static const gl_state_index row2_state[STATE_LENGTH] =
 314          { STATE_COLOR_MATRIX, 0, 2, 2, 0 };
 315       static const gl_state_index row3_state[STATE_LENGTH] =
 316          { STATE_COLOR_MATRIX, 0, 3, 3, 0 };
 317
 318       GLint row0_p = _mesa_add_state_reference(params, row0_state);
 319       GLint row1_p = _mesa_add_state_reference(params, row1_state);
 320       GLint row2_p = _mesa_add_state_reference(params, row2_state);
 321       GLint row3_p = _mesa_add_state_reference(params, row3_state);
 322       const GLuint temp = 1;
 323
 324       /* DP4 temp.x, colorTemp, matrow0; */
 325       _mesa_init_instructions(inst + ic, 1);
 326       inst[ic].Opcode = OPCODE_DP4;
 327       inst[ic].DstReg.File = PROGRAM_TEMPORARY;
 328       inst[ic].DstReg.Index = temp;
 329       inst[ic].DstReg.WriteMask = WRITEMASK_X;
 330       inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
 331       inst[ic].SrcReg[0].Index = colorTemp;
 332       inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
 333       inst[ic].SrcReg[1].Index = row0_p;
 334       ic++;
 335
 336       /* DP4 temp.y, colorTemp, matrow1; */
 337       _mesa_init_instructions(inst + ic, 1);
 338       inst[ic].Opcode = OPCODE_DP4;
 339       inst[ic].DstReg.File = PROGRAM_TEMPORARY;
 340       inst[ic].DstReg.Index = temp;
 341       inst[ic].DstReg.WriteMask = WRITEMASK_Y;
 342       inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
 343       inst[ic].SrcReg[0].Index = colorTemp;
 344       inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
 345       inst[ic].SrcReg[1].Index = row1_p;
 346       ic++;
 347
 348       /* DP4 temp.z, colorTemp, matrow2; */
 349       _mesa_init_instructions(inst + ic, 1);
 350       inst[ic].Opcode = OPCODE_DP4;
 351       inst[ic].DstReg.File = PROGRAM_TEMPORARY;
 352       inst[ic].DstReg.Index = temp;
 353       inst[ic].DstReg.WriteMask = WRITEMASK_Z;
 354       inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
 355       inst[ic].SrcReg[0].Index = colorTemp;
 356       inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
 357       inst[ic].SrcReg[1].Index = row2_p;
 358       ic++;
 359
 360       /* DP4 temp.w, colorTemp, matrow3; */
 361       _mesa_init_instructions(inst + ic, 1);
 362       inst[ic].Opcode = OPCODE_DP4;
 363       inst[ic].DstReg.File = PROGRAM_TEMPORARY;
 364       inst[ic].DstReg.Index = temp;
 365       inst[ic].DstReg.WriteMask = WRITEMASK_W;
 366       inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
 367       inst[ic].SrcReg[0].Index = colorTemp;
 368       inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
 369       inst[ic].SrcReg[1].Index = row3_p;
 370       ic++;
 371
 372       /* MOV colorTemp, temp; */
 373       _mesa_init_instructions(inst + ic, 1);
 374       inst[ic].Opcode = OPCODE_MOV;
 375       inst[ic].DstReg.File = PROGRAM_TEMPORARY;
 376       inst[ic].DstReg.Index = colorTemp;
 377       inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
 378       inst[ic].SrcReg[0].Index = temp;
 379       ic++;
 380    }
 381
 382    if (key->colorMatrixPostScaleBias) {
 383       static const gl_state_index scale_state[STATE_LENGTH] =
 384          { STATE_INTERNAL, STATE_PT_SCALE, 0, 0, 0 };
 385       static const gl_state_index bias_state[STATE_LENGTH] =
 386          { STATE_INTERNAL, STATE_PT_BIAS, 0, 0, 0 };
 387       GLint scale_param, bias_param;
 388
 389       scale_param = _mesa_add_state_reference(params, scale_state);
 390       bias_param = _mesa_add_state_reference(params, bias_state);
 391
 392       _mesa_init_instructions(inst + ic, 1);
 393       inst[ic].Opcode = OPCODE_MAD;
 394       inst[ic].DstReg.File = PROGRAM_TEMPORARY;
 395       inst[ic].DstReg.Index = colorTemp;
 396       inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
 397       inst[ic].SrcReg[0].Index = colorTemp;
 398       inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
 399       inst[ic].SrcReg[1].Index = scale_param;
 400       inst[ic].SrcReg[2].File = PROGRAM_STATE_VAR;
 401       inst[ic].SrcReg[2].Index = bias_param;
 402       ic++;
 403    }
 404
 405    /* Modify last instruction's dst reg to write to result.color */
 406    {
 407       struct prog_instruction *last = &inst[ic - 1];
 408       last->DstReg.File = PROGRAM_OUTPUT;
 409       last->DstReg.Index = FRAG_RESULT_COLOR;
 410    }
 411
 412    /* END; */
 413    _mesa_init_instructions(inst + ic, 1);
 414    inst[ic].Opcode = OPCODE_END;
 415    ic++;
 416
 417    assert(ic <= MAX_INST);
 418
 419
 420    fp->Base.Instructions = _mesa_alloc_instructions(ic);
 421    if (!fp->Base.Instructions) {
 422       _mesa_error(ctx, GL_OUT_OF_MEMORY,
 423                   "generating pixel transfer program");
 424       return NULL;
 425    }
 426
 427    _mesa_copy_instructions(fp->Base.Instructions, inst, ic);
 428    fp->Base.NumInstructions = ic;
 429    fp->Base.Parameters = params;
 430
 431 #if 0
 432    printf("========= pixel transfer prog\n");
 433    _mesa_print_program(&fp->Base);
 434    _mesa_print_parameter_list(fp->Base.Parameters);
 435 #endif
 436
 437    return fp;
 438 }
 439
 440
 441
 442 /**
 443  * Update st->pixel_xfer.program in response to new pixel-transfer state.
 444  */
 445 static void
 446 update_pixel_transfer(struct st_context *st)
 447 {
 448    GLcontext *ctx = st->ctx;
 449    struct state_key key;
 450    struct gl_fragment_program *fp;
 451
 452    make_state_key(st->ctx, &key);
 453
 454    fp = (struct gl_fragment_program *)
 455       _mesa_search_program_cache(st->pixel_xfer.cache, &key, sizeof(key));
 456    if (!fp) {
 457       fp = get_pixel_transfer_program(st->ctx, &key);
 458       _mesa_program_cache_insert(st->ctx, st->pixel_xfer.cache,
 459                                  &key, sizeof(key), &fp->Base);
 460    }
 461
 462    if (ctx->Pixel.MapColorFlag) {
 463       load_color_map_texture(ctx, st->pixel_xfer.pixelmap_texture);
 464    }
 465    st->pixel_xfer.pixelmap_enabled = ctx->Pixel.MapColorFlag;
 466
 467    st->pixel_xfer.program = (struct st_fragment_program *) fp;
 468 }
 469
 470
 471
 472 const struct st_tracked_state st_update_pixel_transfer = {
 473    "st_update_pixel_transfer",                          /* name */
 474    {                                                    /* dirty */
 475       _NEW_PIXEL | _NEW_COLOR_MATRIX,                   /* mesa */
 476       0,                                                /* st */
 477    },
 478    update_pixel_transfer                                /* update */
 479 };