src/gallium/auxiliary/util/u_surface.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 VMware, Inc.  All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sub license, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial portions
  15  * of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  20  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  21  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  22  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  23  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  **************************************************************************/
  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_memory.h"
  42 #include "util/u_rect.h"
  43 #include "util/u_surface.h"
  44
  45
  46 /**
  47  * Helper to quickly create an RGBA rendering surface of a certain size.
  48  * \param textureOut  returns the new texture
  49  * \param surfaceOut  returns the new surface
  50  * \return TRUE for success, FALSE if failure
  51  */
  52 boolean
  53 util_create_rgba_surface(struct pipe_screen *screen,
  54                          uint width, uint height,
  55                          uint bind,
  56                          struct pipe_resource **textureOut,
  57                          struct pipe_surface **surfaceOut)
  58 {
  59    static const enum pipe_format rgbaFormats[] = {
  60       PIPE_FORMAT_B8G8R8A8_UNORM,
  61       PIPE_FORMAT_A8R8G8B8_UNORM,
  62       PIPE_FORMAT_A8B8G8R8_UNORM,
  63       PIPE_FORMAT_NONE
  64    };
  65    const uint target = PIPE_TEXTURE_2D;
  66    enum pipe_format format = PIPE_FORMAT_NONE;
  67    struct pipe_resource templ;
  68    uint i;
  69
  70    /* Choose surface format */
  71    for (i = 0; rgbaFormats[i]; i++) {
  72       if (screen->is_format_supported(screen, rgbaFormats[i],
  73                                       target, 0, bind, 0)) {
  74          format = rgbaFormats[i];
  75          break;
  76       }
  77    }
  78    if (format == PIPE_FORMAT_NONE)
  79       return FALSE;  /* unable to get an rgba format!?! */
  80
  81    /* create texture */
  82    memset(&templ, 0, sizeof(templ));
  83    templ.target = target;
  84    templ.format = format;
  85    templ.last_level = 0;
  86    templ.width0 = width;
  87    templ.height0 = height;
  88    templ.depth0 = 1;
  89    templ.bind = bind;
  90
  91    *textureOut = screen->resource_create(screen, &templ);
  92    if (!*textureOut)
  93       return FALSE;
  94
  95    /* create surface / view into texture */
  96    *surfaceOut = screen->get_tex_surface(screen,
  97                                          *textureOut,
  98                                          0, 0, 0,
  99                                          bind);
 100    if (!*surfaceOut) {
 101       pipe_resource_reference(textureOut, NULL);
 102       return FALSE;
 103    }
 104
 105    return TRUE;
 106 }
 107
 108
 109 /**
 110  * Release the surface and texture from util_create_rgba_surface().
 111  */
 112 void
 113 util_destroy_rgba_surface(struct pipe_resource *texture,
 114                           struct pipe_surface *surface)
 115 {
 116    pipe_surface_reference(&surface, NULL);
 117    pipe_resource_reference(&texture, NULL);
 118 }
 119
 120
 121
 122 /**
 123  * Fallback function for pipe->surface_copy().
 124  * Note: (X,Y)=(0,0) is always the upper-left corner.
 125  */
 126 void
 127 util_resource_copy_region(struct pipe_context *pipe,
 128                           struct pipe_resource *dst,
 129                           struct pipe_subresource subdst,
 130                           unsigned dst_x, unsigned dst_y, unsigned dst_z,
 131                           struct pipe_resource *src,
 132                           struct pipe_subresource subsrc,
 133                           unsigned src_x, unsigned src_y, unsigned src_z,
 134                           unsigned w, unsigned h)
 135 {
 136    struct pipe_transfer *src_trans, *dst_trans;
 137    void *dst_map;
 138    const void *src_map;
 139    enum pipe_format src_format, dst_format;
 140
 141    assert(src && dst);
 142    if (!src || !dst)
 143       return;
 144
 145    src_format = src->format;
 146    dst_format = dst->format;
 147
 148    src_trans = pipe_get_transfer(pipe,
 149                                  src,
 150                                  subsrc.face,
 151                                  subsrc.level,
 152                                  src_z,
 153                                  PIPE_TRANSFER_READ,
 154                                  src_x, src_y, w, h);
 155
 156    dst_trans = pipe_get_transfer(pipe,
 157                                  dst,
 158                                  subdst.face,
 159                                  subdst.level,
 160                                  src_z,
 161                                  PIPE_TRANSFER_WRITE,
 162                                  dst_x, dst_y, w, h);
 163
 164    assert(util_format_get_blocksize(dst_format) == util_format_get_blocksize(src_format));
 165    assert(util_format_get_blockwidth(dst_format) == util_format_get_blockwidth(src_format));
 166    assert(util_format_get_blockheight(dst_format) == util_format_get_blockheight(src_format));
 167
 168    src_map = pipe->transfer_map(pipe, src_trans);
 169    dst_map = pipe->transfer_map(pipe, dst_trans);
 170
 171    assert(src_map);
 172    assert(dst_map);
 173
 174    if (src_map && dst_map) {
 175       util_copy_rect(dst_map,
 176                      dst_format,
 177                      dst_trans->stride,
 178                      0, 0,
 179                      w, h,
 180                      src_map,
 181                      src_trans->stride,
 182                      0,
 183                      0);
 184    }
 185
 186    pipe->transfer_unmap(pipe, src_trans);
 187    pipe->transfer_unmap(pipe, dst_trans);
 188
 189    pipe->transfer_destroy(pipe, src_trans);
 190    pipe->transfer_destroy(pipe, dst_trans);
 191 }
 192
 193
 194
 195 #define UBYTE_TO_USHORT(B) ((B) | ((B) << 8))
 196
 197
 198 /**
 199  * Fallback for pipe->surface_fill() function.
 200  */
 201 void
 202 util_resource_fill_region(struct pipe_context *pipe,
 203                           struct pipe_resource *dst,
 204                           struct pipe_subresource subdst,
 205                           unsigned dstx, unsigned dsty, unsigned dstz,
 206                           unsigned width, unsigned height, unsigned value)
 207 {
 208    struct pipe_transfer *dst_trans;
 209    void *dst_map;
 210
 211    assert(dst);
 212    if (!dst)
 213       return;
 214    dst_trans = pipe_get_transfer(pipe,
 215                                  dst,
 216                                  subdst.face,
 217                                  subdst.level,
 218                                  dstz,
 219                                  PIPE_TRANSFER_WRITE,
 220                                  dstx, dsty, width, height);
 221
 222    dst_map = pipe->transfer_map(pipe, dst_trans);
 223
 224    assert(dst_map);
 225
 226    if (dst_map) {
 227       assert(dst_trans->stride > 0);
 228
 229       switch (util_format_get_blocksize(dst->format)) {
 230       case 1:
 231       case 2:
 232       case 4:
 233          util_fill_rect(dst_map, dst->format,
 234                         dst_trans->stride,
 235                         0, 0, width, height, value);
 236          break;
 237       case 8:
 238       {
 239          /* expand the 4-byte clear value to an 8-byte value */
 240          ushort *row = (ushort *) dst_map;
 241          ushort val0 = UBYTE_TO_USHORT((value >>  0) & 0xff);
 242          ushort val1 = UBYTE_TO_USHORT((value >>  8) & 0xff);
 243          ushort val2 = UBYTE_TO_USHORT((value >> 16) & 0xff);
 244          ushort val3 = UBYTE_TO_USHORT((value >> 24) & 0xff);
 245          unsigned i, j;
 246          val0 = (val0 << 8) | val0;
 247          val1 = (val1 << 8) | val1;
 248          val2 = (val2 << 8) | val2;
 249          val3 = (val3 << 8) | val3;
 250          for (i = 0; i < height; i++) {
 251             for (j = 0; j < width; j++) {
 252                row[j*4+0] = val0;
 253                row[j*4+1] = val1;
 254                row[j*4+2] = val2;
 255                row[j*4+3] = val3;
 256             }
 257             row += dst_trans->stride/2;
 258          }
 259       }
 260       break;
 261       default:
 262          assert(0);
 263          break;
 264       }
 265    }
 266
 267    pipe->transfer_unmap(pipe, dst_trans);
 268    pipe->transfer_destroy(pipe, dst_trans);
 269 }