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_pitch 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                int 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    assert(src_x >= 0);
  69    assert(src_y >= 0);
  70    assert(dst_x >= 0);
  71    assert(dst_y >= 0);
  72
  73    dst_x /= blockwidth;
  74    dst_y /= blockheight;
  75    width = (width + blockwidth - 1)/blockwidth;
  76    height = (height + blockheight - 1)/blockheight;
  77    src_x /= blockwidth;
  78    src_y /= blockheight;
  79
  80    dst += dst_x * blocksize;
  81    src += src_x * blocksize;
  82    dst += dst_y * dst_stride;
  83    src += src_y * src_stride_pos;
  84    width *= blocksize;
  85
  86    if (width == dst_stride && width == src_stride)
  87       memcpy(dst, src, height * width);
  88    else {
  89       for (i = 0; i < height; i++) {
  90          memcpy(dst, src, width);
  91          dst += dst_stride;
  92          src += src_stride;
  93       }
  94    }
  95 }
  96
  97 void
  98 util_fill_rect(ubyte * dst,
  99                enum pipe_format format,
 100                unsigned dst_stride,
 101                unsigned dst_x,
 102                unsigned dst_y,
 103                unsigned width,
 104                unsigned height,
 105                uint32_t value)
 106 {
 107    unsigned i, j;
 108    unsigned width_size;
 109    int blocksize = util_format_get_blocksize(format);
 110    int blockwidth = util_format_get_blockwidth(format);
 111    int blockheight = util_format_get_blockheight(format);
 112
 113    assert(blocksize > 0);
 114    assert(blockwidth > 0);
 115    assert(blockheight > 0);
 116    assert(dst_x >= 0);
 117    assert(dst_y >= 0);
 118
 119    dst_x /= blockwidth;
 120    dst_y /= blockheight;
 121    width = (width + blockwidth - 1)/blockwidth;
 122    height = (height + blockheight - 1)/blockheight;
 123
 124    dst += dst_x * blocksize;
 125    dst += dst_y * dst_stride;
 126    width_size = width * blocksize;
 127
 128    switch (blocksize) {
 129    case 1:
 130       if(dst_stride == width_size)
 131          memset(dst, (ubyte) value, height * width_size);
 132       else {
 133          for (i = 0; i < height; i++) {
 134             memset(dst, (ubyte) value, width_size);
 135             dst += dst_stride;
 136          }
 137       }
 138       break;
 139    case 2:
 140       for (i = 0; i < height; i++) {
 141          uint16_t *row = (uint16_t *)dst;
 142          for (j = 0; j < width; j++)
 143             *row++ = (uint16_t) value;
 144          dst += dst_stride;
 145       }
 146       break;
 147    case 4:
 148       for (i = 0; i < height; i++) {
 149          uint32_t *row = (uint32_t *)dst;
 150          for (j = 0; j < width; j++)
 151             *row++ = value;
 152          dst += dst_stride;
 153       }
 154       break;
 155    default:
 156          assert(0);
 157          break;
 158    }
 159 }
 160
 161
 162
 163 /**
 164  * Fallback function for pipe->surface_copy().
 165  * Note: (X,Y)=(0,0) is always the upper-left corner.
 166  * if do_flip, flip the image vertically on its way from src rect to dst rect.
 167  * XXX should probably put this in new u_surface.c file...
 168  */
 169 void
 170 util_surface_copy(struct pipe_context *pipe,
 171                   boolean do_flip,
 172                   struct pipe_surface *dst,
 173                   unsigned dst_x, unsigned dst_y,
 174                   struct pipe_surface *src,
 175                   unsigned src_x, unsigned src_y,
 176                   unsigned w, unsigned h)
 177 {
 178    struct pipe_screen *screen = pipe->screen;
 179    struct pipe_transfer *src_trans, *dst_trans;
 180    void *dst_map;
 181    const void *src_map;
 182    enum pipe_format src_format, dst_format;
 183
 184    assert(src->texture && dst->texture);
 185    if (!src->texture || !dst->texture)
 186       return;
 187
 188    src_format = src->texture->format;
 189    dst_format = dst->texture->format;
 190
 191    src_trans = screen->get_tex_transfer(screen,
 192                                         src->texture,
 193                                         src->face,
 194                                         src->level,
 195                                         src->zslice,
 196                                         PIPE_TRANSFER_READ,
 197                                         src_x, src_y, w, h);
 198
 199    dst_trans = screen->get_tex_transfer(screen,
 200                                         dst->texture,
 201                                         dst->face,
 202                                         dst->level,
 203                                         dst->zslice,
 204                                         PIPE_TRANSFER_WRITE,
 205                                         dst_x, dst_y, w, h);
 206
 207    assert(util_format_get_blocksize(dst_format) == util_format_get_blocksize(src_format));
 208    assert(util_format_get_blockwidth(dst_format) == util_format_get_blockwidth(src_format));
 209    assert(util_format_get_blockheight(dst_format) == util_format_get_blockheight(src_format));
 210
 211    src_map = pipe->screen->transfer_map(screen, src_trans);
 212    dst_map = pipe->screen->transfer_map(screen, dst_trans);
 213
 214    assert(src_map);
 215    assert(dst_map);
 216
 217    if (src_map && dst_map) {
 218       /* If do_flip, invert src_y position and pass negative src stride */
 219       util_copy_rect(dst_map,
 220                      dst_format,
 221                      dst_trans->stride,
 222                      0, 0,
 223                      w, h,
 224                      src_map,
 225                      do_flip ? -(int) src_trans->stride : src_trans->stride,
 226                      0,
 227                      do_flip ? h - 1 : 0);
 228    }
 229
 230    pipe->screen->transfer_unmap(pipe->screen, src_trans);
 231    pipe->screen->transfer_unmap(pipe->screen, dst_trans);
 232
 233    screen->tex_transfer_destroy(src_trans);
 234    screen->tex_transfer_destroy(dst_trans);
 235 }
 236
 237
 238
 239 #define UBYTE_TO_USHORT(B) ((B) | ((B) << 8))
 240
 241
 242 /**
 243  * Fallback for pipe->surface_fill() function.
 244  * XXX should probably put this in new u_surface.c file...
 245  */
 246 void
 247 util_surface_fill(struct pipe_context *pipe,
 248                   struct pipe_surface *dst,
 249                   unsigned dstx, unsigned dsty,
 250                   unsigned width, unsigned height, unsigned value)
 251 {
 252    struct pipe_screen *screen = pipe->screen;
 253    struct pipe_transfer *dst_trans;
 254    void *dst_map;
 255
 256    assert(dst->texture);
 257    if (!dst->texture)
 258       return;
 259    dst_trans = screen->get_tex_transfer(screen,
 260                                         dst->texture,
 261                                         dst->face,
 262                                         dst->level,
 263                                         dst->zslice,
 264                                         PIPE_TRANSFER_WRITE,
 265                                         dstx, dsty, width, height);
 266
 267    dst_map = pipe->screen->transfer_map(screen, dst_trans);
 268
 269    assert(dst_map);
 270
 271    if (dst_map) {
 272       assert(dst_trans->stride > 0);
 273
 274       switch (util_format_get_blocksize(dst_trans->texture->format)) {
 275       case 1:
 276       case 2:
 277       case 4:
 278          util_fill_rect(dst_map, dst_trans->texture->format, dst_trans->stride,
 279                         0, 0, width, height, value);
 280          break;
 281       case 8:
 282          {
 283             /* expand the 4-byte clear value to an 8-byte value */
 284             ushort *row = (ushort *) dst_map;
 285             ushort val0 = UBYTE_TO_USHORT((value >>  0) & 0xff);
 286             ushort val1 = UBYTE_TO_USHORT((value >>  8) & 0xff);
 287             ushort val2 = UBYTE_TO_USHORT((value >> 16) & 0xff);
 288             ushort val3 = UBYTE_TO_USHORT((value >> 24) & 0xff);
 289             unsigned i, j;
 290             val0 = (val0 << 8) | val0;
 291             val1 = (val1 << 8) | val1;
 292             val2 = (val2 << 8) | val2;
 293             val3 = (val3 << 8) | val3;
 294             for (i = 0; i < height; i++) {
 295                for (j = 0; j < width; j++) {
 296                   row[j*4+0] = val0;
 297                   row[j*4+1] = val1;
 298                   row[j*4+2] = val2;
 299                   row[j*4+3] = val3;
 300                }
 301                row += dst_trans->stride/2;
 302             }
 303          }
 304          break;
 305       default:
 306          assert(0);
 307          break;
 308       }
 309    }
 310
 311    pipe->screen->transfer_unmap(pipe->screen, dst_trans);
 312    screen->tex_transfer_destroy(dst_trans);
 313 }