src/gallium/auxiliary/util/u_rect.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 /**
  29  * Rectangle-related helper functions.
  30  */
  31
  32
  33 #include "pipe/p_defines.h"
  34 #include "pipe/p_format.h"
  35 #include "pipe/p_context.h"
  36 #include "pipe/p_screen.h"
  37 #include "util/u_format.h"
  38 #include "util/u_rect.h"
  39
  40
  41 /**
  42  * Copy 2D rect from one place to another.
  43  * Position and sizes are in pixels.
  44  * src_stride may be negative to do vertical flip of pixels from source.
  45  */
  46 void
  47 util_copy_rect(ubyte * dst,
  48                enum pipe_format format,
  49                unsigned dst_stride,
  50                unsigned dst_x,
  51                unsigned dst_y,
  52                unsigned width,
  53                unsigned height,
  54                const ubyte * src,
  55                int src_stride,
  56                unsigned src_x,
  57                unsigned src_y)
  58 {
  59    unsigned i;
  60    int src_stride_pos = src_stride < 0 ? -src_stride : src_stride;
  61    int blocksize = util_format_get_blocksize(format);
  62    int blockwidth = util_format_get_blockwidth(format);
  63    int blockheight = util_format_get_blockheight(format);
  64
  65    assert(blocksize > 0);
  66    assert(blockwidth > 0);
  67    assert(blockheight > 0);
  68
  69    dst_x /= blockwidth;
  70    dst_y /= blockheight;
  71    width = (width + blockwidth - 1)/blockwidth;
  72    height = (height + blockheight - 1)/blockheight;
  73    src_x /= blockwidth;
  74    src_y /= blockheight;
  75
  76    dst += dst_x * blocksize;
  77    src += src_x * blocksize;
  78    dst += dst_y * dst_stride;
  79    src += src_y * src_stride_pos;
  80    width *= blocksize;
  81
  82    if (width == dst_stride && width == src_stride)
  83       memcpy(dst, src, height * width);
  84    else {
  85       for (i = 0; i < height; i++) {
  86          memcpy(dst, src, width);
  87          dst += dst_stride;
  88          src += src_stride;
  89       }
  90    }
  91 }
  92
  93 void
  94 util_fill_rect(ubyte * dst,
  95                enum pipe_format format,
  96                unsigned dst_stride,
  97                unsigned dst_x,
  98                unsigned dst_y,
  99                unsigned width,
 100                unsigned height,
 101                uint32_t value)
 102 {
 103    unsigned i, j;
 104    unsigned width_size;
 105    int blocksize = util_format_get_blocksize(format);
 106    int blockwidth = util_format_get_blockwidth(format);
 107    int blockheight = util_format_get_blockheight(format);
 108
 109    assert(blocksize > 0);
 110    assert(blockwidth > 0);
 111    assert(blockheight > 0);
 112
 113    dst_x /= blockwidth;
 114    dst_y /= blockheight;
 115    width = (width + blockwidth - 1)/blockwidth;
 116    height = (height + blockheight - 1)/blockheight;
 117
 118    dst += dst_x * blocksize;
 119    dst += dst_y * dst_stride;
 120    width_size = width * blocksize;
 121
 122    switch (blocksize) {
 123    case 1:
 124       if(dst_stride == width_size)
 125          memset(dst, (ubyte) value, height * width_size);
 126       else {
 127          for (i = 0; i < height; i++) {
 128             memset(dst, (ubyte) value, width_size);
 129             dst += dst_stride;
 130          }
 131       }
 132       break;
 133    case 2:
 134       for (i = 0; i < height; i++) {
 135          uint16_t *row = (uint16_t *)dst;
 136          for (j = 0; j < width; j++)
 137             *row++ = (uint16_t) value;
 138          dst += dst_stride;
 139       }
 140       break;
 141    case 4:
 142       for (i = 0; i < height; i++) {
 143          uint32_t *row = (uint32_t *)dst;
 144          for (j = 0; j < width; j++)
 145             *row++ = value;
 146          dst += dst_stride;
 147       }
 148       break;
 149    default:
 150          assert(0);
 151          break;
 152    }
 153 }
 154
 155
 156
 157 /**
 158  * Fallback function for pipe->surface_copy().
 159  * Note: (X,Y)=(0,0) is always the upper-left corner.
 160  * if do_flip, flip the image vertically on its way from src rect to dst rect.
 161  * XXX should probably put this in new u_surface.c file...
 162  */
 163 void
 164 util_surface_copy(struct pipe_context *pipe,
 165                   boolean do_flip,
 166                   struct pipe_surface *dst,
 167                   unsigned dst_x, unsigned dst_y,
 168                   struct pipe_surface *src,
 169                   unsigned src_x, unsigned src_y,
 170                   unsigned w, unsigned h)
 171 {
 172    struct pipe_screen *screen = pipe->screen;
 173    struct pipe_transfer *src_trans, *dst_trans;
 174    void *dst_map;
 175    const void *src_map;
 176    enum pipe_format src_format, dst_format;
 177
 178    assert(src->texture && dst->texture);
 179    if (!src->texture || !dst->texture)
 180       return;
 181
 182    src_format = src->texture->format;
 183    dst_format = dst->texture->format;
 184
 185    src_trans = screen->get_tex_transfer(screen,
 186                                         src->texture,
 187                                         src->face,
 188                                         src->level,
 189                                         src->zslice,
 190                                         PIPE_TRANSFER_READ,
 191                                         src_x, src_y, w, h);
 192
 193    dst_trans = screen->get_tex_transfer(screen,
 194                                         dst->texture,
 195                                         dst->face,
 196                                         dst->level,
 197                                         dst->zslice,
 198                                         PIPE_TRANSFER_WRITE,
 199                                         dst_x, dst_y, w, h);
 200
 201    assert(util_format_get_blocksize(dst_format) == util_format_get_blocksize(src_format));
 202    assert(util_format_get_blockwidth(dst_format) == util_format_get_blockwidth(src_format));
 203    assert(util_format_get_blockheight(dst_format) == util_format_get_blockheight(src_format));
 204
 205    src_map = pipe->screen->transfer_map(screen, src_trans);
 206    dst_map = pipe->screen->transfer_map(screen, dst_trans);
 207
 208    assert(src_map);
 209    assert(dst_map);
 210
 211    if (src_map && dst_map) {
 212       /* If do_flip, invert src_y position and pass negative src stride */
 213       util_copy_rect(dst_map,
 214                      dst_format,
 215                      dst_trans->stride,
 216                      0, 0,
 217                      w, h,
 218                      src_map,
 219                      do_flip ? -(int) src_trans->stride : src_trans->stride,
 220                      0,
 221                      do_flip ? h - 1 : 0);
 222    }
 223
 224    pipe->screen->transfer_unmap(pipe->screen, src_trans);
 225    pipe->screen->transfer_unmap(pipe->screen, dst_trans);
 226
 227    screen->tex_transfer_destroy(src_trans);
 228    screen->tex_transfer_destroy(dst_trans);
 229 }
 230
 231
 232
 233 #define UBYTE_TO_USHORT(B) ((B) | ((B) << 8))
 234
 235
 236 /**
 237  * Fallback for pipe->surface_fill() function.
 238  * XXX should probably put this in new u_surface.c file...
 239  */
 240 void
 241 util_surface_fill(struct pipe_context *pipe,
 242                   struct pipe_surface *dst,
 243                   unsigned dstx, unsigned dsty,
 244                   unsigned width, unsigned height, unsigned value)
 245 {
 246    struct pipe_screen *screen = pipe->screen;
 247    struct pipe_transfer *dst_trans;
 248    void *dst_map;
 249
 250    assert(dst->texture);
 251    if (!dst->texture)
 252       return;
 253    dst_trans = screen->get_tex_transfer(screen,
 254                                         dst->texture,
 255                                         dst->face,
 256                                         dst->level,
 257                                         dst->zslice,
 258                                         PIPE_TRANSFER_WRITE,
 259                                         dstx, dsty, width, height);
 260
 261    dst_map = pipe->screen->transfer_map(screen, dst_trans);
 262
 263    assert(dst_map);
 264
 265    if (dst_map) {
 266       assert(dst_trans->stride > 0);
 267
 268       switch (util_format_get_blocksize(dst_trans->texture->format)) {
 269       case 1:
 270       case 2:
 271       case 4:
 272          util_fill_rect(dst_map, dst_trans->texture->format, dst_trans->stride,
 273                         0, 0, width, height, value);
 274          break;
 275       case 8:
 276          {
 277             /* expand the 4-byte clear value to an 8-byte value */
 278             ushort *row = (ushort *) dst_map;
 279             ushort val0 = UBYTE_TO_USHORT((value >>  0) & 0xff);
 280             ushort val1 = UBYTE_TO_USHORT((value >>  8) & 0xff);
 281             ushort val2 = UBYTE_TO_USHORT((value >> 16) & 0xff);
 282             ushort val3 = UBYTE_TO_USHORT((value >> 24) & 0xff);
 283             unsigned i, j;
 284             val0 = (val0 << 8) | val0;
 285             val1 = (val1 << 8) | val1;
 286             val2 = (val2 << 8) | val2;
 287             val3 = (val3 << 8) | val3;
 288             for (i = 0; i < height; i++) {
 289                for (j = 0; j < width; j++) {
 290                   row[j*4+0] = val0;
 291                   row[j*4+1] = val1;
 292                   row[j*4+2] = val2;
 293                   row[j*4+3] = val3;
 294                }
 295                row += dst_trans->stride/2;
 296             }
 297          }
 298          break;
 299       default:
 300          assert(0);
 301          break;
 302       }
 303    }
 304
 305    pipe->screen->transfer_unmap(pipe->screen, dst_trans);
 306    screen->tex_transfer_destroy(dst_trans);
 307 }