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_inlines.h"
  39 #include "util/u_rect.h"
  40
  41
  42 /**
  43  * Copy 2D rect from one place to another.
  44  * Position and sizes are in pixels.
  45  * src_stride may be negative to do vertical flip of pixels from source.
  46  */
  47 void
  48 util_copy_rect(ubyte * dst,
  49                enum pipe_format format,
  50                unsigned dst_stride,
  51                unsigned dst_x,
  52                unsigned dst_y,
  53                unsigned width,
  54                unsigned height,
  55                const ubyte * src,
  56                int src_stride,
  57                unsigned src_x,
  58                unsigned src_y)
  59 {
  60    unsigned i;
  61    int src_stride_pos = src_stride < 0 ? -src_stride : src_stride;
  62    int blocksize = util_format_get_blocksize(format);
  63    int blockwidth = util_format_get_blockwidth(format);
  64    int blockheight = util_format_get_blockheight(format);
  65
  66    assert(blocksize > 0);
  67    assert(blockwidth > 0);
  68    assert(blockheight > 0);
  69
  70    dst_x /= blockwidth;
  71    dst_y /= blockheight;
  72    width = (width + blockwidth - 1)/blockwidth;
  73    height = (height + blockheight - 1)/blockheight;
  74    src_x /= blockwidth;
  75    src_y /= blockheight;
  76
  77    dst += dst_x * blocksize;
  78    src += src_x * blocksize;
  79    dst += dst_y * dst_stride;
  80    src += src_y * src_stride_pos;
  81    width *= blocksize;
  82
  83    if (width == dst_stride && width == src_stride)
  84       memcpy(dst, src, height * width);
  85    else {
  86       for (i = 0; i < height; i++) {
  87          memcpy(dst, src, width);
  88          dst += dst_stride;
  89          src += src_stride;
  90       }
  91    }
  92 }
  93
  94 void
  95 util_fill_rect(ubyte * dst,
  96                enum pipe_format format,
  97                unsigned dst_stride,
  98                unsigned dst_x,
  99                unsigned dst_y,
 100                unsigned width,
 101                unsigned height,
 102                uint32_t value)
 103 {
 104    unsigned i, j;
 105    unsigned width_size;
 106    int blocksize = util_format_get_blocksize(format);
 107    int blockwidth = util_format_get_blockwidth(format);
 108    int blockheight = util_format_get_blockheight(format);
 109
 110    assert(blocksize > 0);
 111    assert(blockwidth > 0);
 112    assert(blockheight > 0);
 113
 114    dst_x /= blockwidth;
 115    dst_y /= blockheight;
 116    width = (width + blockwidth - 1)/blockwidth;
 117    height = (height + blockheight - 1)/blockheight;
 118
 119    dst += dst_x * blocksize;
 120    dst += dst_y * dst_stride;
 121    width_size = width * blocksize;
 122
 123    switch (blocksize) {
 124    case 1:
 125       if(dst_stride == width_size)
 126          memset(dst, (ubyte) value, height * width_size);
 127       else {
 128          for (i = 0; i < height; i++) {
 129             memset(dst, (ubyte) value, width_size);
 130             dst += dst_stride;
 131          }
 132       }
 133       break;
 134    case 2:
 135       for (i = 0; i < height; i++) {
 136          uint16_t *row = (uint16_t *)dst;
 137          for (j = 0; j < width; j++)
 138             *row++ = (uint16_t) value;
 139          dst += dst_stride;
 140       }
 141       break;
 142    case 4:
 143       for (i = 0; i < height; i++) {
 144          uint32_t *row = (uint32_t *)dst;
 145          for (j = 0; j < width; j++)
 146             *row++ = value;
 147          dst += dst_stride;
 148       }
 149       break;
 150    default:
 151          assert(0);
 152          break;
 153    }
 154 }
 155
 156
 157
 158 /**
 159  * Fallback function for pipe->surface_copy().
 160  * Note: (X,Y)=(0,0) is always the upper-left corner.
 161  * if do_flip, flip the image vertically on its way from src rect to dst rect.
 162  * XXX should probably put this in new u_surface.c file...
 163  */
 164 void
 165 util_surface_copy(struct pipe_context *pipe,
 166                   boolean do_flip,
 167                   struct pipe_surface *dst,
 168                   unsigned dst_x, unsigned dst_y,
 169                   struct pipe_surface *src,
 170                   unsigned src_x, unsigned src_y,
 171                   unsigned w, unsigned h)
 172 {
 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 = pipe_get_transfer(pipe,
 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 = pipe_get_transfer(pipe,
 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->transfer_map(pipe, src_trans);
 206    dst_map = pipe->transfer_map(pipe, 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->transfer_unmap(pipe, src_trans);
 225    pipe->transfer_unmap(pipe, dst_trans);
 226
 227    pipe->transfer_destroy(pipe, src_trans);
 228    pipe->transfer_destroy(pipe, 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_transfer *dst_trans;
 247    void *dst_map;
 248
 249    assert(dst->texture);
 250    if (!dst->texture)
 251       return;
 252    dst_trans = pipe_get_transfer(pipe,
 253                                  dst->texture,
 254                                  dst->face,
 255                                  dst->level,
 256                                  dst->zslice,
 257                                  PIPE_TRANSFER_WRITE,
 258                                  dstx, dsty, width, height);
 259
 260    dst_map = pipe->transfer_map(pipe, dst_trans);
 261
 262    assert(dst_map);
 263
 264    if (dst_map) {
 265       assert(dst_trans->stride > 0);
 266
 267       switch (util_format_get_blocksize(dst->texture->format)) {
 268       case 1:
 269       case 2:
 270       case 4:
 271          util_fill_rect(dst_map, dst->texture->format,
 272                         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->transfer_unmap(pipe, dst_trans);
 306    pipe->transfer_destroy(pipe, dst_trans);
 307 }