src/gallium/auxiliary/util/u_surface.c

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  26
  27 /**
  28  * @file
  29  * Surface utility functions.
  30  *
  31  * @author Brian Paul
  32  */
  33
  34
  35 #include "pipe/p_defines.h"
  36 #include "pipe/p_screen.h"
  37 #include "pipe/p_state.h"
  38
  39 #include "util/u_format.h"
  40 #include "util/u_inlines.h"
  41 #include "util/u_rect.h"
  42 #include "util/u_surface.h"
  43 #include "util/u_pack_color.h"
  44
  45 void
  46 u_surface_default_template(struct pipe_surface *view,
  47                            const struct pipe_resource *texture,
  48                            unsigned bind)
  49 {
  50    view->format = texture->format;
  51    view->u.tex.level = 0;
  52    view->u.tex.first_layer = 0;
  53    view->u.tex.last_layer = 0;
  54    /* XXX should filter out all non-rt/ds bind flags ? */
  55    view->usage = bind;
  56 }
  57
  58 /**
  59  * Helper to quickly create an RGBA rendering surface of a certain size.
  60  * \param textureOut  returns the new texture
  61  * \param surfaceOut  returns the new surface
  62  * \return TRUE for success, FALSE if failure
  63  */
  64 boolean
  65 util_create_rgba_surface(struct pipe_context *pipe,
  66                          uint width, uint height,
  67                          uint bind,
  68                          struct pipe_resource **textureOut,
  69                          struct pipe_surface **surfaceOut)
  70 {
  71    static const enum pipe_format rgbaFormats[] = {
  72       PIPE_FORMAT_B8G8R8A8_UNORM,
  73       PIPE_FORMAT_A8R8G8B8_UNORM,
  74       PIPE_FORMAT_A8B8G8R8_UNORM,
  75       PIPE_FORMAT_NONE
  76    };
  77    const uint target = PIPE_TEXTURE_2D;
  78    enum pipe_format format = PIPE_FORMAT_NONE;
  79    struct pipe_resource templ;
  80    struct pipe_surface surf_templ;
  81    struct pipe_screen *screen = pipe->screen;
  82    uint i;
  83
  84    /* Choose surface format */
  85    for (i = 0; rgbaFormats[i]; i++) {
  86       if (screen->is_format_supported(screen, rgbaFormats[i],
  87                                       target, 0, bind)) {
  88          format = rgbaFormats[i];
  89          break;
  90       }
  91    }
  92    if (format == PIPE_FORMAT_NONE)
  93       return FALSE;  /* unable to get an rgba format!?! */
  94
  95    /* create texture */
  96    memset(&templ, 0, sizeof(templ));
  97    templ.target = target;
  98    templ.format = format;
  99    templ.last_level = 0;
 100    templ.width0 = width;
 101    templ.height0 = height;
 102    templ.depth0 = 1;
 103    templ.array_size = 1;
 104    templ.bind = bind;
 105
 106    *textureOut = screen->resource_create(screen, &templ);
 107    if (!*textureOut)
 108       return FALSE;
 109
 110    /* create surface */
 111    memset(&surf_templ, 0, sizeof(surf_templ));
 112    u_surface_default_template(&surf_templ, *textureOut, bind);
 113    /* create surface / view into texture */
 114    *surfaceOut = pipe->create_surface(pipe,
 115                                       *textureOut,
 116                                       &surf_templ);
 117    if (!*surfaceOut) {
 118       pipe_resource_reference(textureOut, NULL);
 119       return FALSE;
 120    }
 121
 122    return TRUE;
 123 }
 124
 125
 126 /**
 127  * Release the surface and texture from util_create_rgba_surface().
 128  */
 129 void
 130 util_destroy_rgba_surface(struct pipe_resource *texture,
 131                           struct pipe_surface *surface)
 132 {
 133    pipe_surface_reference(&surface, NULL);
 134    pipe_resource_reference(&texture, NULL);
 135 }
 136
 137
 138
 139 /**
 140  * Fallback function for pipe->resource_copy_region().
 141  * Note: (X,Y)=(0,0) is always the upper-left corner.
 142  */
 143 void
 144 util_resource_copy_region(struct pipe_context *pipe,
 145                           struct pipe_resource *dst,
 146                           unsigned dst_level,
 147                           unsigned dst_x, unsigned dst_y, unsigned dst_z,
 148                           struct pipe_resource *src,
 149                           unsigned src_level,
 150                           const struct pipe_box *src_box)
 151 {
 152    struct pipe_transfer *src_trans, *dst_trans;
 153    void *dst_map;
 154    const void *src_map;
 155    enum pipe_format src_format, dst_format;
 156    unsigned w = src_box->width;
 157    unsigned h = src_box->height;
 158
 159    assert(src && dst);
 160    assert((src->target == PIPE_BUFFER && dst->target == PIPE_BUFFER) ||
 161           (src->target != PIPE_BUFFER && dst->target != PIPE_BUFFER));
 162
 163    if (!src || !dst)
 164       return;
 165
 166    src_format = src->format;
 167    dst_format = dst->format;
 168
 169    src_trans = pipe_get_transfer(pipe,
 170                                  src,
 171                                  src_level,
 172                                  src_box->z,
 173                                  PIPE_TRANSFER_READ,
 174                                  src_box->x, src_box->y, w, h);
 175
 176    dst_trans = pipe_get_transfer(pipe,
 177                                  dst,
 178                                  dst_level,
 179                                  dst_z,
 180                                  PIPE_TRANSFER_WRITE,
 181                                  dst_x, dst_y, w, h);
 182
 183    assert(util_format_get_blocksize(dst_format) == util_format_get_blocksize(src_format));
 184    assert(util_format_get_blockwidth(dst_format) == util_format_get_blockwidth(src_format));
 185    assert(util_format_get_blockheight(dst_format) == util_format_get_blockheight(src_format));
 186
 187    src_map = pipe->transfer_map(pipe, src_trans);
 188    dst_map = pipe->transfer_map(pipe, dst_trans);
 189
 190    assert(src_map);
 191    assert(dst_map);
 192
 193    if (src_map && dst_map) {
 194       if (dst->target == PIPE_BUFFER && src->target == PIPE_BUFFER) {
 195          memcpy(dst_map, src_map, w);
 196       } else {
 197          util_copy_rect(dst_map,
 198                         dst_format,
 199                         dst_trans->stride,
 200                         0, 0,
 201                         w, h,
 202                         src_map,
 203                         src_trans->stride,
 204                         0,
 205                         0);
 206       }
 207    }
 208
 209    pipe->transfer_unmap(pipe, src_trans);
 210    pipe->transfer_unmap(pipe, dst_trans);
 211
 212    pipe->transfer_destroy(pipe, src_trans);
 213    pipe->transfer_destroy(pipe, dst_trans);
 214 }
 215
 216
 217
 218 #define UBYTE_TO_USHORT(B) ((B) | ((B) << 8))
 219
 220
 221 /**
 222  * Fallback for pipe->clear_render_target() function.
 223  * XXX this looks too hackish to be really useful.
 224  * cpp > 4 looks like a gross hack at best...
 225  * Plus can't use these transfer fallbacks when clearing
 226  * multisampled surfaces for instance.
 227  */
 228 void
 229 util_clear_render_target(struct pipe_context *pipe,
 230                          struct pipe_surface *dst,
 231                          const float *rgba,
 232                          unsigned dstx, unsigned dsty,
 233                          unsigned width, unsigned height)
 234 {
 235    struct pipe_transfer *dst_trans;
 236    void *dst_map;
 237    union util_color uc;
 238
 239    assert(dst->texture);
 240    if (!dst->texture)
 241       return;
 242    /* XXX: should handle multiple layers */
 243    dst_trans = pipe_get_transfer(pipe,
 244                                  dst->texture,
 245                                  dst->u.tex.level,
 246                                  dst->u.tex.first_layer,
 247                                  PIPE_TRANSFER_WRITE,
 248                                  dstx, dsty, width, height);
 249
 250    dst_map = pipe->transfer_map(pipe, dst_trans);
 251
 252    assert(dst_map);
 253
 254    if (dst_map) {
 255       assert(dst_trans->stride > 0);
 256
 257       util_pack_color(rgba, dst->texture->format, &uc);
 258       util_fill_rect(dst_map, dst->texture->format,
 259                      dst_trans->stride,
 260                      0, 0, width, height, &uc);
 261    }
 262
 263    pipe->transfer_unmap(pipe, dst_trans);
 264    pipe->transfer_destroy(pipe, dst_trans);
 265 }
 266
 267 /**
 268  * Fallback for pipe->clear_stencil() function.
 269  * sw fallback doesn't look terribly useful here.
 270  * Plus can't use these transfer fallbacks when clearing
 271  * multisampled surfaces for instance.
 272  */
 273 void
 274 util_clear_depth_stencil(struct pipe_context *pipe,
 275                          struct pipe_surface *dst,
 276                          unsigned clear_flags,
 277                          double depth,
 278                          unsigned stencil,
 279                          unsigned dstx, unsigned dsty,
 280                          unsigned width, unsigned height)
 281 {
 282    struct pipe_transfer *dst_trans;
 283    ubyte *dst_map;
 284    boolean need_rmw = FALSE;
 285
 286    if ((clear_flags & PIPE_CLEAR_DEPTHSTENCIL) &&
 287        ((clear_flags & PIPE_CLEAR_DEPTHSTENCIL) != PIPE_CLEAR_DEPTHSTENCIL) &&
 288        util_format_is_depth_and_stencil(dst->format))
 289       need_rmw = TRUE;
 290
 291    assert(dst->texture);
 292    if (!dst->texture)
 293       return;
 294    dst_trans = pipe_get_transfer(pipe,
 295                                  dst->texture,
 296                                  dst->u.tex.level,
 297                                  dst->u.tex.first_layer,
 298                                  (need_rmw ? PIPE_TRANSFER_READ_WRITE :
 299                                      PIPE_TRANSFER_WRITE),
 300                                  dstx, dsty, width, height);
 301
 302    dst_map = pipe->transfer_map(pipe, dst_trans);
 303
 304    assert(dst_map);
 305
 306    if (dst_map) {
 307       unsigned dst_stride = dst_trans->stride;
 308       unsigned zstencil = util_pack_z_stencil(dst->texture->format, depth, stencil);
 309       unsigned i, j;
 310       assert(dst_trans->stride > 0);
 311
 312       switch (util_format_get_blocksize(dst->format)) {
 313       case 1:
 314          assert(dst->format == PIPE_FORMAT_S8_USCALED);
 315          if(dst_stride == width)
 316             memset(dst_map, (ubyte) zstencil, height * width);
 317          else {
 318             for (i = 0; i < height; i++) {
 319                memset(dst_map, (ubyte) zstencil, width);
 320                dst_map += dst_stride;
 321             }
 322          }
 323          break;
 324       case 2:
 325          assert(dst->format == PIPE_FORMAT_Z16_UNORM);
 326          for (i = 0; i < height; i++) {
 327             uint16_t *row = (uint16_t *)dst_map;
 328             for (j = 0; j < width; j++)
 329                *row++ = (uint16_t) zstencil;
 330             dst_map += dst_stride;
 331             }
 332          break;
 333       case 4:
 334          if (!need_rmw) {
 335             for (i = 0; i < height; i++) {
 336                uint32_t *row = (uint32_t *)dst_map;
 337                for (j = 0; j < width; j++)
 338                   *row++ = zstencil;
 339                dst_map += dst_stride;
 340             }
 341          }
 342          else {
 343             uint32_t dst_mask;
 344             if (dst->format == PIPE_FORMAT_Z24_UNORM_S8_USCALED)
 345                dst_mask = 0xffffff00;
 346             else {
 347                assert(dst->format == PIPE_FORMAT_S8_USCALED_Z24_UNORM);
 348                dst_mask = 0xffffff;
 349             }
 350             if (clear_flags & PIPE_CLEAR_DEPTH)
 351                dst_mask = ~dst_mask;
 352             for (i = 0; i < height; i++) {
 353                uint32_t *row = (uint32_t *)dst_map;
 354                for (j = 0; j < width; j++) {
 355                   uint32_t tmp = *row & dst_mask;
 356                   *row++ = tmp | (zstencil & ~dst_mask);
 357                }
 358                dst_map += dst_stride;
 359             }
 360          }
 361         break;
 362       case 8:
 363       default:
 364          assert(0);
 365          break;
 366       }
 367    }
 368
 369    pipe->transfer_unmap(pipe, dst_trans);
 370    pipe->transfer_destroy(pipe, dst_trans);
 371 }