src/gallium/state_trackers/wgl/stw_pixelformat.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 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 #include "main/mtypes.h"
  29 #include "main/context.h"
  30
  31 #include "pipe/p_format.h"
  32 #include "pipe/p_defines.h"
  33 #include "pipe/p_screen.h"
  34
  35 #include "util/u_debug.h"
  36
  37 #include "stw_icd.h"
  38 #include "stw_device.h"
  39 #include "stw_pixelformat.h"
  40 #include "stw_tls.h"
  41
  42
  43 struct stw_pf_color_info
  44 {
  45    enum pipe_format format;
  46    struct {
  47       unsigned char red;
  48       unsigned char green;
  49       unsigned char blue;
  50       unsigned char alpha;
  51    } bits;
  52    struct {
  53       unsigned char red;
  54       unsigned char green;
  55       unsigned char blue;
  56       unsigned char alpha;
  57    } shift;
  58 };
  59
  60 struct stw_pf_depth_info
  61 {
  62    enum pipe_format format;
  63    struct {
  64       unsigned char depth;
  65       unsigned char stencil;
  66    } bits;
  67 };
  68
  69
  70 /* NOTE: order matters, since in otherwise equal circumstances the first
  71  * format listed will get chosen */
  72
  73 static const struct stw_pf_color_info
  74 stw_pf_color[] = {
  75    /* no-alpha */
  76    { PIPE_FORMAT_X8R8G8B8_UNORM,    { 8,  8,  8,  0}, {16,  8,  0,  0} },
  77    { PIPE_FORMAT_B8G8R8X8_UNORM,    { 8,  8,  8,  0}, { 8, 16, 24,  0} },
  78    { PIPE_FORMAT_R5G6B5_UNORM,      { 5,  6,  5,  0}, {11,  5,  0,  0} },
  79    /* alpha */
  80    { PIPE_FORMAT_A8R8G8B8_UNORM,    { 8,  8,  8,  8}, {16,  8,  0, 24} },
  81    { PIPE_FORMAT_B8G8R8A8_UNORM,    { 8,  8,  8,  8}, { 8, 16, 24,  0} },
  82 #if 0
  83    { PIPE_FORMAT_A2B10G10R10_UNORM, {10, 10, 10,  2}, { 0, 10, 20, 30} },
  84 #endif
  85    { PIPE_FORMAT_A1R5G5B5_UNORM,    { 5,  5,  5,  1}, {10,  5,  0, 15} },
  86    { PIPE_FORMAT_A4R4G4B4_UNORM,    { 4,  4,  4,  4}, {16,  4,  0, 12} }
  87 };
  88
  89
  90 static const struct stw_pf_depth_info
  91 stw_pf_depth_stencil[] = {
  92    /* pure depth */
  93    { PIPE_FORMAT_Z32_UNORM,   {32, 0} },
  94    { PIPE_FORMAT_Z24X8_UNORM, {24, 0} },
  95    { PIPE_FORMAT_X8Z24_UNORM, {24, 0} },
  96    { PIPE_FORMAT_Z16_UNORM,   {16, 0} },
  97    /* pure stencil */
  98    { PIPE_FORMAT_S8_UNORM,    { 0, 8} },
  99    /* combined depth-stencil */
 100    { PIPE_FORMAT_S8Z24_UNORM, {24, 8} },
 101    { PIPE_FORMAT_Z24S8_UNORM, {24, 8} }
 102 };
 103
 104
 105 static const boolean
 106 stw_pf_doublebuffer[] = {
 107    FALSE,
 108    TRUE,
 109 };
 110
 111
 112 const unsigned
 113 stw_pf_multisample[] = {
 114    0,
 115    4
 116 };
 117
 118
 119 static void
 120 stw_pixelformat_add(
 121    struct stw_device *stw_dev,
 122    const struct stw_pf_color_info *color,
 123    const struct stw_pf_depth_info *depth,
 124    unsigned accum,
 125    boolean doublebuffer,
 126    unsigned samples )
 127 {
 128    boolean extended = FALSE;
 129    struct stw_pixelformat_info *pfi;
 130
 131    assert(stw_dev->pixelformat_extended_count < STW_MAX_PIXELFORMATS);
 132    if(stw_dev->pixelformat_extended_count >= STW_MAX_PIXELFORMATS)
 133       return;
 134
 135    assert(pf_layout( color->format ) == PIPE_FORMAT_LAYOUT_RGBAZS );
 136    assert(pf_get_component_bits( color->format, PIPE_FORMAT_COMP_R ) == color->bits.red );
 137    assert(pf_get_component_bits( color->format, PIPE_FORMAT_COMP_G ) == color->bits.green );
 138    assert(pf_get_component_bits( color->format, PIPE_FORMAT_COMP_B ) == color->bits.blue );
 139    assert(pf_get_component_bits( color->format, PIPE_FORMAT_COMP_A ) == color->bits.alpha );
 140    assert(pf_layout( depth->format ) == PIPE_FORMAT_LAYOUT_RGBAZS );
 141    assert(pf_get_component_bits( depth->format, PIPE_FORMAT_COMP_Z ) == depth->bits.depth );
 142    assert(pf_get_component_bits( depth->format, PIPE_FORMAT_COMP_S ) == depth->bits.stencil );
 143
 144    pfi = &stw_dev->pixelformats[stw_dev->pixelformat_extended_count];
 145
 146    memset(pfi, 0, sizeof *pfi);
 147
 148    pfi->color_format = color->format;
 149    pfi->depth_stencil_format = depth->format;
 150
 151    pfi->pfd.nSize = sizeof pfi->pfd;
 152    pfi->pfd.nVersion = 1;
 153
 154    pfi->pfd.dwFlags = PFD_SUPPORT_OPENGL;
 155
 156    /* TODO: also support non-native pixel formats */
 157    pfi->pfd.dwFlags |= PFD_DRAW_TO_WINDOW ;
 158
 159    if (doublebuffer)
 160       pfi->pfd.dwFlags |= PFD_DOUBLEBUFFER | PFD_SWAP_COPY;
 161
 162    pfi->pfd.iPixelType = PFD_TYPE_RGBA;
 163
 164    pfi->pfd.cColorBits = color->bits.red + color->bits.green + color->bits.blue + color->bits.alpha;
 165    pfi->pfd.cRedBits = color->bits.red;
 166    pfi->pfd.cRedShift = color->shift.red;
 167    pfi->pfd.cGreenBits = color->bits.green;
 168    pfi->pfd.cGreenShift = color->shift.green;
 169    pfi->pfd.cBlueBits = color->bits.blue;
 170    pfi->pfd.cBlueShift = color->shift.blue;
 171    pfi->pfd.cAlphaBits = color->bits.alpha;
 172    pfi->pfd.cAlphaShift = color->shift.alpha;
 173    pfi->pfd.cAccumBits = 4*accum;
 174    pfi->pfd.cAccumRedBits = accum;
 175    pfi->pfd.cAccumGreenBits = accum;
 176    pfi->pfd.cAccumBlueBits = accum;
 177    pfi->pfd.cAccumAlphaBits = accum;
 178    pfi->pfd.cDepthBits = depth->bits.depth;
 179    pfi->pfd.cStencilBits = depth->bits.stencil;
 180    pfi->pfd.cAuxBuffers = 0;
 181    pfi->pfd.iLayerType = 0;
 182    pfi->pfd.bReserved = 0;
 183    pfi->pfd.dwLayerMask = 0;
 184    pfi->pfd.dwVisibleMask = 0;
 185    pfi->pfd.dwDamageMask = 0;
 186
 187    if(samples) {
 188       pfi->numSampleBuffers = 1;
 189       pfi->numSamples = samples;
 190       extended = TRUE;
 191    }
 192
 193    ++stw_dev->pixelformat_extended_count;
 194
 195    if(!extended) {
 196       ++stw_dev->pixelformat_count;
 197       assert(stw_dev->pixelformat_count == stw_dev->pixelformat_extended_count);
 198    }
 199 }
 200
 201 void
 202 stw_pixelformat_init( void )
 203 {
 204    struct pipe_screen *screen = stw_dev->screen;
 205    unsigned i, j, k, l;
 206
 207    assert( !stw_dev->pixelformat_count );
 208    assert( !stw_dev->pixelformat_extended_count );
 209
 210    for(i = 0; i < Elements(stw_pf_multisample); ++i) {
 211       unsigned samples = stw_pf_multisample[i];
 212
 213       /* FIXME: re-enabled MSAA when we can query it */
 214       if(samples)
 215          continue;
 216
 217       for(j = 0; j < Elements(stw_pf_color); ++j) {
 218          const struct stw_pf_color_info *color = &stw_pf_color[j];
 219
 220          if(!screen->is_format_supported(screen, color->format, PIPE_TEXTURE_2D,
 221                                          PIPE_TEXTURE_USAGE_RENDER_TARGET, 0))
 222             continue;
 223
 224          for(k = 0; k < Elements(stw_pf_doublebuffer); ++k) {
 225             unsigned doublebuffer = stw_pf_doublebuffer[k];
 226
 227             for(l = 0; l < Elements(stw_pf_depth_stencil); ++l) {
 228                const struct stw_pf_depth_info *depth = &stw_pf_depth_stencil[l];
 229
 230                if(!screen->is_format_supported(screen, depth->format, PIPE_TEXTURE_2D,
 231                                                PIPE_TEXTURE_USAGE_DEPTH_STENCIL, 0))
 232                   continue;
 233
 234                stw_pixelformat_add( stw_dev, color, depth,  0, doublebuffer, samples );
 235                stw_pixelformat_add( stw_dev, color, depth, 16, doublebuffer, samples );
 236             }
 237          }
 238       }
 239    }
 240
 241    assert( stw_dev->pixelformat_count <= stw_dev->pixelformat_extended_count );
 242    assert( stw_dev->pixelformat_extended_count <= STW_MAX_PIXELFORMATS );
 243 }
 244
 245 uint
 246 stw_pixelformat_get_count( void )
 247 {
 248    return stw_dev->pixelformat_count;
 249 }
 250
 251 uint
 252 stw_pixelformat_get_extended_count( void )
 253 {
 254    return stw_dev->pixelformat_extended_count;
 255 }
 256
 257 const struct stw_pixelformat_info *
 258 stw_pixelformat_get_info( uint index )
 259 {
 260    assert( index < stw_dev->pixelformat_extended_count );
 261
 262    return &stw_dev->pixelformats[index];
 263 }
 264
 265
 266 void
 267 stw_pixelformat_visual(GLvisual *visual,
 268                        const struct stw_pixelformat_info *pfi )
 269 {
 270    memset(visual, 0, sizeof *visual);
 271    _mesa_initialize_visual(
 272       visual,
 273       (pfi->pfd.iPixelType == PFD_TYPE_RGBA) ? GL_TRUE : GL_FALSE,
 274       (pfi->pfd.dwFlags & PFD_DOUBLEBUFFER) ? GL_TRUE : GL_FALSE,
 275       (pfi->pfd.dwFlags & PFD_STEREO) ? GL_TRUE : GL_FALSE,
 276       pfi->pfd.cRedBits,
 277       pfi->pfd.cGreenBits,
 278       pfi->pfd.cBlueBits,
 279       pfi->pfd.cAlphaBits,
 280       (pfi->pfd.iPixelType == PFD_TYPE_COLORINDEX) ? pfi->pfd.cColorBits : 0,
 281       pfi->pfd.cDepthBits,
 282       pfi->pfd.cStencilBits,
 283       pfi->pfd.cAccumRedBits,
 284       pfi->pfd.cAccumGreenBits,
 285       pfi->pfd.cAccumBlueBits,
 286       pfi->pfd.cAccumAlphaBits,
 287       pfi->numSamples );
 288 }
 289
 290
 291 LONG APIENTRY
 292 DrvDescribePixelFormat(
 293    HDC hdc,
 294    INT iPixelFormat,
 295    ULONG cjpfd,
 296    PIXELFORMATDESCRIPTOR *ppfd )
 297 {
 298    uint count;
 299    uint index;
 300    const struct stw_pixelformat_info *pfi;
 301
 302    (void) hdc;
 303
 304    count = stw_pixelformat_get_extended_count();
 305    index = (uint) iPixelFormat - 1;
 306
 307    if (ppfd == NULL)
 308       return count;
 309    if (index >= count || cjpfd != sizeof( PIXELFORMATDESCRIPTOR ))
 310       return 0;
 311
 312    pfi = stw_pixelformat_get_info( index );
 313
 314    memcpy(ppfd, &pfi->pfd, sizeof( PIXELFORMATDESCRIPTOR ));
 315
 316    return count;
 317 }
 318
 319 BOOL APIENTRY
 320 DrvDescribeLayerPlane(
 321    HDC hdc,
 322    INT iPixelFormat,
 323    INT iLayerPlane,
 324    UINT nBytes,
 325    LPLAYERPLANEDESCRIPTOR plpd )
 326 {
 327    assert(0);
 328    return FALSE;
 329 }
 330
 331 int APIENTRY
 332 DrvGetLayerPaletteEntries(
 333    HDC hdc,
 334    INT iLayerPlane,
 335    INT iStart,
 336    INT cEntries,
 337    COLORREF *pcr )
 338 {
 339    assert(0);
 340    return 0;
 341 }
 342
 343 int APIENTRY
 344 DrvSetLayerPaletteEntries(
 345    HDC hdc,
 346    INT iLayerPlane,
 347    INT iStart,
 348    INT cEntries,
 349    CONST COLORREF *pcr )
 350 {
 351    assert(0);
 352    return 0;
 353 }
 354
 355 BOOL APIENTRY
 356 DrvRealizeLayerPalette(
 357    HDC hdc,
 358    INT iLayerPlane,
 359    BOOL bRealize )
 360 {
 361    assert(0);
 362    return FALSE;
 363 }
 364
 365 /* Only used by the wgl code, but have it here to avoid exporting the
 366  * pixelformat.h functionality.
 367  */
 368 int stw_pixelformat_choose( HDC hdc,
 369                             CONST PIXELFORMATDESCRIPTOR *ppfd )
 370 {
 371    uint count;
 372    uint index;
 373    uint bestindex;
 374    uint bestdelta;
 375
 376    (void) hdc;
 377
 378    count = stw_pixelformat_get_count();
 379    bestindex = count;
 380    bestdelta = ~0U;
 381
 382    for (index = 0; index < count; index++) {
 383       uint delta = 0;
 384       const struct stw_pixelformat_info *pfi = stw_pixelformat_get_info( index );
 385
 386       if (!(ppfd->dwFlags & PFD_DOUBLEBUFFER_DONTCARE) &&
 387           !!(ppfd->dwFlags & PFD_DOUBLEBUFFER) !=
 388           !!(pfi->pfd.dwFlags & PFD_DOUBLEBUFFER))
 389          continue;
 390
 391       /* FIXME: Take in account individual channel bits */
 392       if (ppfd->cColorBits != pfi->pfd.cColorBits)
 393          delta += 8;
 394
 395       if (ppfd->cDepthBits != pfi->pfd.cDepthBits)
 396          delta += 4;
 397
 398       if (ppfd->cStencilBits != pfi->pfd.cStencilBits)
 399          delta += 2;
 400
 401       if (ppfd->cAlphaBits != pfi->pfd.cAlphaBits)
 402          delta++;
 403
 404       if (delta < bestdelta) {
 405          bestindex = index;
 406          bestdelta = delta;
 407          if (bestdelta == 0)
 408             break;
 409       }
 410    }
 411
 412    if (bestindex == count)
 413       return 0;
 414
 415    return bestindex + 1;
 416 }