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    dest = (uint *) pipe_transfer_map(pipe,
 105                                      pt, 0, 0, PIPE_TRANSFER_WRITE,
 106                                      0, 0, texSize, texSize, &transfer);
 107
 108    /* Pack four 1D maps into a 2D texture:
 109     * R map is placed horizontally, indexed by S, in channel 0
 110     * G map is placed vertically, indexed by T, in channel 1
 111     * B map is placed horizontally, indexed by S, in channel 2
 112     * A map is placed vertically, indexed by T, in channel 3
 113     */
 114    for (i = 0; i < texSize; i++) {
 115       for (j = 0; j < texSize; j++) {
 116          union util_color uc;
 117          int k = (i * texSize + j);
 118          float rgba[4];
 119          rgba[0] = ctx->PixelMaps.RtoR.Map[j * rSize / texSize];
 120          rgba[1] = ctx->PixelMaps.GtoG.Map[i * gSize / texSize];
 121          rgba[2] = ctx->PixelMaps.BtoB.Map[j * bSize / texSize];
 122          rgba[3] = ctx->PixelMaps.AtoA.Map[i * aSize / texSize];
 123          util_pack_color(rgba, pt->format, &uc);
 124          *(dest + k) = uc.ui;
 125       }
 126    }
 127
 128    pipe_transfer_unmap(pipe, transfer);
 129 }
 130
 131
 132
 133 #define MAX_INST 100
 134
 135 /**
 136  * Returns a fragment program which implements the current pixel transfer ops.
 137  */
 138 static struct gl_fragment_program *
 139 get_pixel_transfer_program(struct gl_context *ctx, const struct state_key *key)
 140 {
 141    struct st_context *st = st_context(ctx);
 142    struct prog_instruction inst[MAX_INST];
 143    struct gl_program_parameter_list *params;
 144    struct gl_fragment_program *fp;
 145    GLuint ic = 0;
 146    const GLuint colorTemp = 0;
 147
 148    fp = (struct gl_fragment_program *)
 149       ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0);
 150    if (!fp)
 151       return NULL;
 152
 153    params = _mesa_new_parameter_list();
 154
 155    /*
 156     * Get initial pixel color from the texture.
 157     * TEX colorTemp, fragment.texcoord[0], texture[0], 2D;
 158     */
 159    _mesa_init_instructions(inst + ic, 1);
 160    inst[ic].Opcode = OPCODE_TEX;
 161    inst[ic].DstReg.File = PROGRAM_TEMPORARY;
 162    inst[ic].DstReg.Index = colorTemp;
 163    inst[ic].SrcReg[0].File = PROGRAM_INPUT;
 164    inst[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0;
 165    inst[ic].TexSrcUnit = 0;
 166    inst[ic].TexSrcTarget = TEXTURE_2D_INDEX;
 167    ic++;
 168    fp->Base.InputsRead = BITFIELD64_BIT(FRAG_ATTRIB_TEX0);
 169    fp->Base.OutputsWritten = BITFIELD64_BIT(FRAG_RESULT_COLOR);
 170    fp->Base.SamplersUsed = 0x1;  /* sampler 0 (bit 0) is used */
 171
 172    if (key->scaleAndBias) {
 173       static const gl_state_index scale_state[STATE_LENGTH] =
 174          { STATE_INTERNAL, STATE_PT_SCALE, 0, 0, 0 };
 175       static const gl_state_index bias_state[STATE_LENGTH] =
 176          { STATE_INTERNAL, STATE_PT_BIAS, 0, 0, 0 };
 177       GLint scale_p, bias_p;
 178
 179       scale_p = _mesa_add_state_reference(params, scale_state);
 180       bias_p = _mesa_add_state_reference(params, bias_state);
 181
 182       /* MAD colorTemp, colorTemp, scale, bias; */
 183       _mesa_init_instructions(inst + ic, 1);
 184       inst[ic].Opcode = OPCODE_MAD;
 185       inst[ic].DstReg.File = PROGRAM_TEMPORARY;
 186       inst[ic].DstReg.Index = colorTemp;
 187       inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
 188       inst[ic].SrcReg[0].Index = colorTemp;
 189       inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
 190       inst[ic].SrcReg[1].Index = scale_p;
 191       inst[ic].SrcReg[2].File = PROGRAM_STATE_VAR;
 192       inst[ic].SrcReg[2].Index = bias_p;
 193       ic++;
 194    }
 195
 196    if (key->pixelMaps) {
 197       const GLuint temp = 1;
 198
 199       /* create the colormap/texture now if not already done */
 200       if (!st->pixel_xfer.pixelmap_texture) {
 201          st->pixel_xfer.pixelmap_texture = st_create_color_map_texture(ctx);
 202          st->pixel_xfer.pixelmap_sampler_view =
 203             st_create_texture_sampler_view(st->pipe,
 204                                            st->pixel_xfer.pixelmap_texture);
 205       }
 206
 207       /* with a little effort, we can do four pixel map look-ups with
 208        * two TEX instructions:
 209        */
 210
 211       /* TEX temp.rg, colorTemp.rgba, texture[1], 2D; */
 212       _mesa_init_instructions(inst + ic, 1);
 213       inst[ic].Opcode = OPCODE_TEX;
 214       inst[ic].DstReg.File = PROGRAM_TEMPORARY;
 215       inst[ic].DstReg.Index = temp;
 216       inst[ic].DstReg.WriteMask = WRITEMASK_XY; /* write R,G */
 217       inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
 218       inst[ic].SrcReg[0].Index = colorTemp;
 219       inst[ic].TexSrcUnit = 1;
 220       inst[ic].TexSrcTarget = TEXTURE_2D_INDEX;
 221       ic++;
 222
 223       /* TEX temp.ba, colorTemp.baba, texture[1], 2D; */
 224       _mesa_init_instructions(inst + ic, 1);
 225       inst[ic].Opcode = OPCODE_TEX;
 226       inst[ic].DstReg.File = PROGRAM_TEMPORARY;
 227       inst[ic].DstReg.Index = temp;
 228       inst[ic].DstReg.WriteMask = WRITEMASK_ZW; /* write B,A */
 229       inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
 230       inst[ic].SrcReg[0].Index = colorTemp;
 231       inst[ic].SrcReg[0].Swizzle = MAKE_SWIZZLE4(SWIZZLE_Z, SWIZZLE_W,
 232                                                  SWIZZLE_Z, SWIZZLE_W);
 233       inst[ic].TexSrcUnit = 1;
 234       inst[ic].TexSrcTarget = TEXTURE_2D_INDEX;
 235       ic++;
 236
 237       /* MOV colorTemp, temp; */
 238       _mesa_init_instructions(inst + ic, 1);
 239       inst[ic].Opcode = OPCODE_MOV;
 240       inst[ic].DstReg.File = PROGRAM_TEMPORARY;
 241       inst[ic].DstReg.Index = colorTemp;
 242       inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
 243       inst[ic].SrcReg[0].Index = temp;
 244       ic++;
 245
 246       fp->Base.SamplersUsed |= (1 << 1);  /* sampler 1 is used */
 247    }
 248
 249    /* Modify last instruction's dst reg to write to result.color */
 250    {
 251       struct prog_instruction *last = &inst[ic - 1];
 252       last->DstReg.File = PROGRAM_OUTPUT;
 253       last->DstReg.Index = FRAG_RESULT_COLOR;
 254    }
 255
 256    /* END; */
 257    _mesa_init_instructions(inst + ic, 1);
 258    inst[ic].Opcode = OPCODE_END;
 259    ic++;
 260
 261    assert(ic <= MAX_INST);
 262
 263
 264    fp->Base.Instructions = _mesa_alloc_instructions(ic);
 265    if (!fp->Base.Instructions) {
 266       _mesa_error(ctx, GL_OUT_OF_MEMORY,
 267                   "generating pixel transfer program");
 268       _mesa_free_parameter_list(params);
 269       return NULL;
 270    }
 271
 272    _mesa_copy_instructions(fp->Base.Instructions, inst, ic);
 273    fp->Base.NumInstructions = ic;
 274    fp->Base.Parameters = params;
 275
 276 #if 0
 277    printf("========= pixel transfer prog\n");
 278    _mesa_print_program(&fp->Base);
 279    _mesa_print_parameter_list(fp->Base.Parameters);
 280 #endif
 281
 282    return fp;
 283 }
 284
 285
 286
 287 /**
 288  * Update st->pixel_xfer.program in response to new pixel-transfer state.
 289  */
 290 static void
 291 update_pixel_transfer(struct st_context *st)
 292 {
 293    struct gl_context *ctx = st->ctx;
 294    struct state_key key;
 295    struct gl_fragment_program *fp;
 296
 297    make_state_key(st->ctx, &key);
 298
 299    fp = (struct gl_fragment_program *)
 300       _mesa_search_program_cache(st->pixel_xfer.cache, &key, sizeof(key));
 301    if (!fp) {
 302       fp = get_pixel_transfer_program(st->ctx, &key);
 303       _mesa_program_cache_insert(st->ctx, st->pixel_xfer.cache,
 304                                  &key, sizeof(key), &fp->Base);
 305    }
 306
 307    if (ctx->Pixel.MapColorFlag) {
 308       load_color_map_texture(ctx, st->pixel_xfer.pixelmap_texture);
 309    }
 310    st->pixel_xfer.pixelmap_enabled = ctx->Pixel.MapColorFlag;
 311
 312    st->pixel_xfer.program = (struct st_fragment_program *) fp;
 313 }
 314
 315
 316
 317 const struct st_tracked_state st_update_pixel_transfer = {
 318    "st_update_pixel_transfer",                          /* name */
 319    {                                                    /* dirty */
 320       _NEW_PIXEL,                                       /* mesa */
 321       0,                                                /* st */
 322    },
 323    update_pixel_transfer                                /* update */
 324 };