reactos/dll/opengl/mesa/src/mesa/state_tracker/st_atom_texture.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   * Authors:
  30   *   Keith Whitwell <keith@tungstengraphics.com>
  31   *   Brian Paul
  32   */
  33
  34
  35 #include "main/macros.h"
  36 #include "main/mtypes.h"
  37 #include "main/samplerobj.h"
  38 #include "program/prog_instruction.h"
  39
  40 #include "st_context.h"
  41 #include "st_atom.h"
  42 #include "st_texture.h"
  43 #include "st_format.h"
  44 #include "st_cb_texture.h"
  45 #include "pipe/p_context.h"
  46 #include "util/u_format.h"
  47 #include "util/u_inlines.h"
  48 #include "cso_cache/cso_context.h"
  49
  50
  51 /**
  52  * Combine depth texture mode with "swizzle" so that depth mode swizzling
  53  * takes place before texture swizzling, and return the resulting swizzle.
  54  * If the format is not a depth format, return "swizzle" unchanged.
  55  *
  56  * \param format     PIPE_FORMAT_*.
  57  * \param swizzle    Texture swizzle, a bitmask computed using MAKE_SWIZZLE4.
  58  * \param depthmode  One of GL_LUMINANCE, GL_INTENSITY, GL_ALPHA, GL_RED.
  59  */
  60 static GLuint
  61 apply_depthmode(enum pipe_format format, GLuint swizzle, GLenum depthmode)
  62 {
  63    const struct util_format_description *desc =
  64          util_format_description(format);
  65    unsigned char swiz[4];
  66    unsigned i;
  67
  68    if (desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS ||
  69        desc->swizzle[0] == UTIL_FORMAT_SWIZZLE_NONE) {
  70       /* Not a depth format. */
  71       return swizzle;
  72    }
  73
  74    for (i = 0; i < 4; i++)
  75       swiz[i] = GET_SWZ(swizzle, i);
  76
  77    switch (depthmode) {
  78       case GL_LUMINANCE:
  79          /* Rewrite reads from W to ONE, and reads from XYZ to XXX. */
  80          for (i = 0; i < 4; i++)
  81             if (swiz[i] == SWIZZLE_W)
  82                swiz[i] = SWIZZLE_ONE;
  83             else if (swiz[i] < SWIZZLE_W)
  84                swiz[i] = SWIZZLE_X;
  85          break;
  86
  87       case GL_INTENSITY:
  88          /* Rewrite reads from XYZW to XXXX. */
  89          for (i = 0; i < 4; i++)
  90             if (swiz[i] <= SWIZZLE_W)
  91                swiz[i] = SWIZZLE_X;
  92          break;
  93
  94       case GL_ALPHA:
  95          /* Rewrite reads from W to X, and reads from XYZ to 000. */
  96          for (i = 0; i < 4; i++)
  97             if (swiz[i] == SWIZZLE_W)
  98                swiz[i] = SWIZZLE_X;
  99             else if (swiz[i] < SWIZZLE_W)
 100                swiz[i] = SWIZZLE_ZERO;
 101          break;
 102       case GL_RED:
 103          /* Rewrite reads W to 1, XYZ to X00 */
 104          for (i = 0; i < 4; i++)
 105             if (swiz[i] == SWIZZLE_W)
 106                swiz[i] = SWIZZLE_ONE;
 107             else if (swiz[i] == SWIZZLE_Y || swiz[i] == SWIZZLE_Z)
 108                swiz[i] = SWIZZLE_ZERO;
 109          break;
 110    }
 111
 112    return MAKE_SWIZZLE4(swiz[0], swiz[1], swiz[2], swiz[3]);
 113 }
 114
 115
 116 /**
 117  * Return TRUE if the swizzling described by "swizzle" and
 118  * "depthmode" (for depth textures only) is different from the swizzling
 119  * set in the given sampler view.
 120  *
 121  * \param sv         A sampler view.
 122  * \param swizzle    Texture swizzle, a bitmask computed using MAKE_SWIZZLE4.
 123  * \param depthmode  One of GL_LUMINANCE, GL_INTENSITY, GL_ALPHA.
 124  */
 125 static boolean
 126 check_sampler_swizzle(struct pipe_sampler_view *sv,
 127                       GLuint swizzle, GLenum depthmode)
 128 {
 129    swizzle = apply_depthmode(sv->texture->format, swizzle, depthmode);
 130
 131    if ((sv->swizzle_r != GET_SWZ(swizzle, 0)) ||
 132        (sv->swizzle_g != GET_SWZ(swizzle, 1)) ||
 133        (sv->swizzle_b != GET_SWZ(swizzle, 2)) ||
 134        (sv->swizzle_a != GET_SWZ(swizzle, 3)))
 135       return TRUE;
 136    return FALSE;
 137 }
 138
 139
 140 static INLINE struct pipe_sampler_view *
 141 st_create_texture_sampler_view_from_stobj(struct pipe_context *pipe,
 142                                           struct st_texture_object *stObj,
 143                                           const struct gl_sampler_object *samp,
 144                                           enum pipe_format format)
 145 {
 146    struct pipe_sampler_view templ;
 147    GLuint swizzle = apply_depthmode(stObj->pt->format,
 148                                     stObj->base._Swizzle,
 149                                     samp->DepthMode);
 150
 151    u_sampler_view_default_template(&templ,
 152                                    stObj->pt,
 153                                    format);
 154    templ.u.tex.first_level = stObj->base.BaseLevel;
 155
 156    if (swizzle != SWIZZLE_NOOP) {
 157       templ.swizzle_r = GET_SWZ(swizzle, 0);
 158       templ.swizzle_g = GET_SWZ(swizzle, 1);
 159       templ.swizzle_b = GET_SWZ(swizzle, 2);
 160       templ.swizzle_a = GET_SWZ(swizzle, 3);
 161    }
 162
 163    return pipe->create_sampler_view(pipe, stObj->pt, &templ);
 164 }
 165
 166
 167 static INLINE struct pipe_sampler_view *
 168 st_get_texture_sampler_view_from_stobj(struct st_texture_object *stObj,
 169                                        struct pipe_context *pipe,
 170                                        const struct gl_sampler_object *samp,
 171                                        enum pipe_format format)
 172 {
 173    if (!stObj || !stObj->pt) {
 174       return NULL;
 175    }
 176
 177    if (!stObj->sampler_view) {
 178       stObj->sampler_view =
 179          st_create_texture_sampler_view_from_stobj(pipe, stObj, samp, format);
 180    }
 181
 182    return stObj->sampler_view;
 183 }
 184
 185 static GLboolean
 186 update_single_texture(struct st_context *st, struct pipe_sampler_view **sampler_view,
 187                       GLuint texUnit)
 188 {
 189    struct pipe_context *pipe = st->pipe;
 190    struct gl_context *ctx = st->ctx;
 191    const struct gl_sampler_object *samp;
 192    struct gl_texture_object *texObj;
 193    struct st_texture_object *stObj;
 194    enum pipe_format st_view_format;
 195    GLboolean retval;
 196
 197    samp = _mesa_get_samplerobj(ctx, texUnit);
 198
 199    texObj = ctx->Texture.Unit[texUnit]._Current;
 200
 201    if (!texObj) {
 202       texObj = st_get_default_texture(st);
 203       samp = &texObj->Sampler;
 204    }
 205    stObj = st_texture_object(texObj);
 206
 207    retval = st_finalize_texture(ctx, st->pipe, texObj);
 208    if (!retval) {
 209       /* out of mem */
 210       return GL_FALSE;
 211    }
 212
 213    /* Determine the format of the texture sampler view */
 214    st_view_format = stObj->pt->format;
 215    {
 216       const struct st_texture_image *firstImage =
 217          st_texture_image(stObj->base.Image[0][stObj->base.BaseLevel]);
 218       const gl_format texFormat = firstImage->base.TexFormat;
 219       enum pipe_format firstImageFormat =
 220          st_mesa_format_to_pipe_format(texFormat);
 221
 222       if ((samp->sRGBDecode == GL_SKIP_DECODE_EXT) &&
 223           (_mesa_get_format_color_encoding(texFormat) == GL_SRGB)) {
 224          /* Don't do sRGB->RGB conversion.  Interpret the texture data as
 225           * linear values.
 226           */
 227          const gl_format linearFormat =
 228             _mesa_get_srgb_format_linear(texFormat);
 229          firstImageFormat = st_mesa_format_to_pipe_format(linearFormat);
 230       }
 231
 232       if (firstImageFormat != stObj->pt->format)
 233          st_view_format = firstImageFormat;
 234    }
 235
 236
 237    /* if sampler view has changed dereference it */
 238    if (stObj->sampler_view) {
 239       if (check_sampler_swizzle(stObj->sampler_view,
 240                                 stObj->base._Swizzle,
 241                                 samp->DepthMode) ||
 242           (st_view_format != stObj->sampler_view->format) ||
 243           stObj->base.BaseLevel != stObj->sampler_view->u.tex.first_level) {
 244          pipe_sampler_view_reference(&stObj->sampler_view, NULL);
 245       }
 246    }
 247
 248    *sampler_view = st_get_texture_sampler_view_from_stobj(stObj, pipe,
 249                                                           samp,
 250                                                           st_view_format);
 251    return GL_TRUE;
 252 }
 253
 254 static void
 255 update_vertex_textures(struct st_context *st)
 256 {
 257    const struct gl_context *ctx = st->ctx;
 258    struct gl_vertex_program *vprog = ctx->VertexProgram._Current;
 259    GLuint su;
 260
 261    st->state.num_vertex_textures = 0;
 262
 263    /* loop over sampler units (aka tex image units) */
 264    for (su = 0; su < ctx->Const.MaxTextureImageUnits; su++) {
 265       struct pipe_sampler_view *sampler_view = NULL;
 266       if (vprog->Base.SamplersUsed & (1 << su)) {
 267          GLboolean retval;
 268          GLuint texUnit;
 269
 270          texUnit = vprog->Base.SamplerUnits[su];
 271
 272          retval = update_single_texture(st, &sampler_view, texUnit);
 273          if (retval == GL_FALSE)
 274             continue;
 275
 276          st->state.num_vertex_textures = su + 1;
 277       }
 278       pipe_sampler_view_reference(&st->state.sampler_vertex_views[su], sampler_view);
 279    }
 280
 281    if (ctx->Const.MaxVertexTextureImageUnits > 0) {
 282       GLuint numUnits = MIN2(st->state.num_vertex_textures,
 283                              ctx->Const.MaxVertexTextureImageUnits);
 284       cso_set_vertex_sampler_views(st->cso_context,
 285                                    numUnits,
 286                                    st->state.sampler_vertex_views);
 287    }
 288 }
 289
 290 static void
 291 update_fragment_textures(struct st_context *st)
 292 {
 293    const struct gl_context *ctx = st->ctx;
 294    struct gl_fragment_program *fprog = ctx->FragmentProgram._Current;
 295    GLuint su;
 296
 297    st->state.num_textures = 0;
 298
 299    /* loop over sampler units (aka tex image units) */
 300    for (su = 0; su < ctx->Const.MaxTextureImageUnits; su++) {
 301       struct pipe_sampler_view *sampler_view = NULL;
 302       if (fprog->Base.SamplersUsed & (1 << su)) {
 303          GLboolean retval;
 304          GLuint texUnit;
 305
 306          texUnit = fprog->Base.SamplerUnits[su];
 307
 308          retval = update_single_texture(st, &sampler_view, texUnit);
 309          if (retval == GL_FALSE)
 310             continue;
 311
 312          st->state.num_textures = su + 1;
 313       }
 314       pipe_sampler_view_reference(&st->state.sampler_views[su], sampler_view);
 315    }
 316
 317    cso_set_fragment_sampler_views(st->cso_context,
 318                                   st->state.num_textures,
 319                                   st->state.sampler_views);
 320 }
 321
 322 const struct st_tracked_state st_update_texture = {
 323    "st_update_texture",                                 /* name */
 324    {                                                    /* dirty */
 325       _NEW_TEXTURE,                                     /* mesa */
 326       ST_NEW_FRAGMENT_PROGRAM,                          /* st */
 327    },
 328    update_fragment_textures                             /* update */
 329 };
 330
 331 const struct st_tracked_state st_update_vertex_texture = {
 332    "st_update_vertex_texture",                                  /* name */
 333    {                                                    /* dirty */
 334       _NEW_TEXTURE,                                     /* mesa */
 335       ST_NEW_VERTEX_PROGRAM,                            /* st */
 336    },
 337    update_vertex_textures                               /* update */
 338 };
 339
 340 static void
 341 finalize_textures(struct st_context *st)
 342 {
 343    struct gl_context *ctx = st->ctx;
 344    struct gl_fragment_program *fprog = ctx->FragmentProgram._Current;
 345    const GLboolean prev_missing_textures = st->missing_textures;
 346    GLuint su;
 347
 348    st->missing_textures = GL_FALSE;
 349
 350    for (su = 0; su < ctx->Const.MaxTextureCoordUnits; su++) {
 351       if (fprog->Base.SamplersUsed & (1 << su)) {
 352          const GLuint texUnit = fprog->Base.SamplerUnits[su];
 353          struct gl_texture_object *texObj
 354             = ctx->Texture.Unit[texUnit]._Current;
 355
 356          if (texObj) {
 357             GLboolean retval;
 358
 359             retval = st_finalize_texture(ctx, st->pipe, texObj);
 360             if (!retval) {
 361                /* out of mem */
 362                st->missing_textures = GL_TRUE;
 363                continue;
 364             }
 365          }
 366       }
 367    }
 368
 369    if (prev_missing_textures != st->missing_textures)
 370       st->dirty.st |= ST_NEW_FRAGMENT_PROGRAM;
 371 }
 372
 373
 374
 375 const struct st_tracked_state st_finalize_textures = {
 376    "st_finalize_textures",              /* name */
 377    {                                    /* dirty */
 378       _NEW_TEXTURE,                     /* mesa */
 379       0,                                /* st */
 380    },
 381    finalize_textures                    /* update */
 382 };