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_rect.h"
  38
  39
  40 /**
  41  * Copy 2D rect from one place to another.
  42  * Position and sizes are in pixels.
  43  * src_pitch may be negative to do vertical flip of pixels from source.
  44  */
  45 void
  46 util_copy_rect(ubyte * dst,
  47                enum pipe_format format,
  48                unsigned dst_stride,
  49                unsigned dst_x,
  50                unsigned dst_y,
  51                unsigned width,
  52                unsigned height,
  53                const ubyte * src,
  54                int src_stride,
  55                unsigned src_x,
  56                int src_y)
  57 {
  58    unsigned i;
  59    int src_stride_pos = src_stride < 0 ? -src_stride : src_stride;
  60    int blocksize = pf_get_blocksize(format);
  61    int blockwidth = pf_get_blockwidth(format);
  62    int blockheight = pf_get_blockheight(format);
  63
  64    assert(blocksize > 0);
  65    assert(blockwidth > 0);
  66    assert(blockheight > 0);
  67    assert(src_x >= 0);
  68    assert(src_y >= 0);
  69    assert(dst_x >= 0);
  70    assert(dst_y >= 0);
  71
  72    dst_x /= blockwidth;
  73    dst_y /= blockheight;
  74    width = (width + blockwidth - 1)/blockwidth;
  75    height = (height + blockheight - 1)/blockheight;
  76    src_x /= blockwidth;
  77    src_y /= blockheight;
  78
  79    dst += dst_x * blocksize;
  80    src += src_x * blocksize;
  81    dst += dst_y * dst_stride;
  82    src += src_y * src_stride_pos;
  83    width *= blocksize;
  84
  85    if (width == dst_stride && width == src_stride)
  86       memcpy(dst, src, height * width);
  87    else {
  88       for (i = 0; i < height; i++) {
  89          memcpy(dst, src, width);
  90          dst += dst_stride;
  91          src += src_stride;
  92       }
  93    }
  94 }
  95
  96 void
  97 util_fill_rect(ubyte * dst,
  98                enum pipe_format format,
  99                unsigned dst_stride,
 100                unsigned dst_x,
 101                unsigned dst_y,
 102                unsigned width,
 103                unsigned height,
 104                uint32_t value)
 105 {
 106    unsigned i, j;
 107    unsigned width_size;
 108    int blocksize = pf_get_blocksize(format);
 109    int blockwidth = pf_get_blockwidth(format);
 110    int blockheight = pf_get_blockheight(format);
 111
 112    assert(blocksize > 0);
 113    assert(blockwidth > 0);
 114    assert(blockheight > 0);
 115    assert(dst_x >= 0);
 116    assert(dst_y >= 0);
 117
 118    dst_x /= blockwidth;
 119    dst_y /= blockheight;
 120    width = (width + blockwidth - 1)/blockwidth;
 121    height = (height + blockheight - 1)/blockheight;
 122
 123    dst += dst_x * blocksize;
 124    dst += dst_y * dst_stride;
 125    width_size = width * blocksize;
 126
 127    switch (blocksize) {
 128    case 1:
 129       if(dst_stride == width_size)
 130          memset(dst, (ubyte) value, height * width_size);
 131       else {
 132          for (i = 0; i < height; i++) {
 133             memset(dst, (ubyte) value, width_size);
 134             dst += dst_stride;
 135          }
 136       }
 137       break;
 138    case 2:
 139       for (i = 0; i < height; i++) {
 140          uint16_t *row = (uint16_t *)dst;
 141          for (j = 0; j < width; j++)
 142             *row++ = (uint16_t) value;
 143          dst += dst_stride;
 144       }
 145       break;
 146    case 4:
 147       for (i = 0; i < height; i++) {
 148          uint32_t *row = (uint32_t *)dst;
 149          for (j = 0; j < width; j++)
 150             *row++ = value;
 151          dst += dst_stride;
 152       }
 153       break;
 154    default:
 155          assert(0);
 156          break;
 157    }
 158 }
 159
 160
 161
 162 /**
 163  * Fallback function for pipe->surface_copy().
 164  * Note: (X,Y)=(0,0) is always the upper-left corner.
 165  * if do_flip, flip the image vertically on its way from src rect to dst rect.
 166  * XXX should probably put this in new u_surface.c file...
 167  */
 168 void
 169 util_surface_copy(struct pipe_context *pipe,
 170                   boolean do_flip,
 171                   struct pipe_surface *dst,
 172                   unsigned dst_x, unsigned dst_y,
 173                   struct pipe_surface *src,
 174                   unsigned src_x, unsigned src_y,
 175                   unsigned w, unsigned h)
 176 {
 177    struct pipe_screen *screen = pipe->screen;
 178    struct pipe_transfer *src_trans, *dst_trans;
 179    void *dst_map;
 180    const void *src_map;
 181    enum pipe_format src_format, dst_format;
 182
 183    assert(src->texture && dst->texture);
 184    if (!src->texture || !dst->texture)
 185       return;
 186
 187    src_format = src->texture->format;
 188    dst_format = dst->texture->format;
 189
 190    src_trans = screen->get_tex_transfer(screen,
 191                                         src->texture,
 192                                         src->face,
 193                                         src->level,
 194                                         src->zslice,
 195                                         PIPE_TRANSFER_READ,
 196                                         src_x, src_y, w, h);
 197
 198    dst_trans = screen->get_tex_transfer(screen,
 199                                         dst->texture,
 200                                         dst->face,
 201                                         dst->level,
 202                                         dst->zslice,
 203                                         PIPE_TRANSFER_WRITE,
 204                                         dst_x, dst_y, w, h);
 205
 206    assert(pf_get_blocksize(dst_format) == pf_get_blocksize(src_format));
 207    assert(pf_get_blockwidth(dst_format) == pf_get_blockwidth(src_format));
 208    assert(pf_get_blockheight(dst_format) == pf_get_blockheight(src_format));
 209
 210    src_map = pipe->screen->transfer_map(screen, src_trans);
 211    dst_map = pipe->screen->transfer_map(screen, dst_trans);
 212
 213    assert(src_map);
 214    assert(dst_map);
 215
 216    if (src_map && dst_map) {
 217       /* If do_flip, invert src_y position and pass negative src stride */
 218       util_copy_rect(dst_map,
 219                      dst_format,
 220                      dst_trans->stride,
 221                      0, 0,
 222                      w, h,
 223                      src_map,
 224                      do_flip ? -(int) src_trans->stride : src_trans->stride,
 225                      0,
 226                      do_flip ? h - 1 : 0);
 227    }
 228
 229    pipe->screen->transfer_unmap(pipe->screen, src_trans);
 230    pipe->screen->transfer_unmap(pipe->screen, dst_trans);
 231
 232    screen->tex_transfer_destroy(src_trans);
 233    screen->tex_transfer_destroy(dst_trans);
 234 }
 235
 236
 237
 238 #define UBYTE_TO_USHORT(B) ((B) | ((B) << 8))
 239
 240
 241 /**
 242  * Fallback for pipe->surface_fill() function.
 243  * XXX should probably put this in new u_surface.c file...
 244  */
 245 void
 246 util_surface_fill(struct pipe_context *pipe,
 247                   struct pipe_surface *dst,
 248                   unsigned dstx, unsigned dsty,
 249                   unsigned width, unsigned height, unsigned value)
 250 {
 251    struct pipe_screen *screen = pipe->screen;
 252    struct pipe_transfer *dst_trans;
 253    void *dst_map;
 254
 255    assert(dst->texture);
 256    if (!dst->texture)
 257       return;
 258    dst_trans = screen->get_tex_transfer(screen,
 259                                         dst->texture,
 260                                         dst->face,
 261                                         dst->level,
 262                                         dst->zslice,
 263                                         PIPE_TRANSFER_WRITE,
 264                                         dstx, dsty, width, height);
 265
 266    dst_map = pipe->screen->transfer_map(screen, dst_trans);
 267
 268    assert(dst_map);
 269
 270    if (dst_map) {
 271       assert(dst_trans->stride > 0);
 272
 273       switch (pf_get_blocksize(dst_trans->texture->format)) {
 274       case 1:
 275       case 2:
 276       case 4:
 277          util_fill_rect(dst_map, dst_trans->texture->format, dst_trans->stride,
 278                         0, 0, width, height, value);
 279          break;
 280       case 8:
 281          {
 282             /* expand the 4-byte clear value to an 8-byte value */
 283             ushort *row = (ushort *) dst_map;
 284             ushort val0 = UBYTE_TO_USHORT((value >>  0) & 0xff);
 285             ushort val1 = UBYTE_TO_USHORT((value >>  8) & 0xff);
 286             ushort val2 = UBYTE_TO_USHORT((value >> 16) & 0xff);
 287             ushort val3 = UBYTE_TO_USHORT((value >> 24) & 0xff);
 288             unsigned i, j;
 289             val0 = (val0 << 8) | val0;
 290             val1 = (val1 << 8) | val1;
 291             val2 = (val2 << 8) | val2;
 292             val3 = (val3 << 8) | val3;
 293             for (i = 0; i < height; i++) {
 294                for (j = 0; j < width; j++) {
 295                   row[j*4+0] = val0;
 296                   row[j*4+1] = val1;
 297                   row[j*4+2] = val2;
 298                   row[j*4+3] = val3;
 299                }
 300                row += dst_trans->stride/2;
 301             }
 302          }
 303          break;
 304       default:
 305          assert(0);
 306          break;
 307       }
 308    }
 309
 310    pipe->screen->transfer_unmap(pipe->screen, dst_trans);
 311    screen->tex_transfer_destroy(dst_trans);
 312 }