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 pipe_copy_rect(ubyte * dst,
  47                const struct pipe_format_block *block,
  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
  61    assert(block->size > 0);
  62    assert(block->width > 0);
  63    assert(block->height > 0);
  64    assert(src_x >= 0);
  65    assert(src_y >= 0);
  66    assert(dst_x >= 0);
  67    assert(dst_y >= 0);
  68
  69    dst_x /= block->width;
  70    dst_y /= block->height;
  71    width = (width + block->width - 1)/block->width;
  72    height = (height + block->height - 1)/block->height;
  73    src_x /= block->width;
  74    src_y /= block->height;
  75
  76    dst += dst_x * block->size;
  77    src += src_x * block->size;
  78    dst += dst_y * dst_stride;
  79    src += src_y * src_stride_pos;
  80    width *= block->size;
  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 pipe_fill_rect(ubyte * dst,
  95                const struct pipe_format_block *block,
  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
 106    assert(block->size > 0);
 107    assert(block->width > 0);
 108    assert(block->height > 0);
 109    assert(dst_x >= 0);
 110    assert(dst_y >= 0);
 111
 112    dst_x /= block->width;
 113    dst_y /= block->height;
 114    width = (width + block->width - 1)/block->width;
 115    height = (height + block->height - 1)/block->height;
 116
 117    dst += dst_x * block->size;
 118    dst += dst_y * dst_stride;
 119    width_size = width * block->size;
 120
 121    switch (block->size) {
 122    case 1:
 123       if(dst_stride == width_size)
 124          memset(dst, (ubyte) value, height * width_size);
 125       else {
 126          for (i = 0; i < height; i++) {
 127             memset(dst, (ubyte) value, width_size);
 128             dst += dst_stride;
 129          }
 130       }
 131       break;
 132    case 2:
 133       for (i = 0; i < height; i++) {
 134          uint16_t *row = (uint16_t *)dst;
 135          for (j = 0; j < width; j++)
 136             *row++ = (uint16_t) value;
 137          dst += dst_stride;
 138       }
 139       break;
 140    case 4:
 141       for (i = 0; i < height; i++) {
 142          uint32_t *row = (uint32_t *)dst;
 143          for (j = 0; j < width; j++)
 144             *row++ = value;
 145          dst += dst_stride;
 146       }
 147       break;
 148    default:
 149          assert(0);
 150          break;
 151    }
 152 }
 153
 154
 155
 156 /**
 157  * Fallback function for pipe->surface_copy().
 158  * Note: (X,Y)=(0,0) is always the upper-left corner.
 159  * if do_flip, flip the image vertically on its way from src rect to dst rect.
 160  * XXX should probably put this in new u_surface.c file...
 161  */
 162 void
 163 util_surface_copy(struct pipe_context *pipe,
 164                   boolean do_flip,
 165                   struct pipe_surface *dst,
 166                   unsigned dst_x, unsigned dst_y,
 167                   struct pipe_surface *src,
 168                   unsigned src_x, unsigned src_y,
 169                   unsigned w, unsigned h)
 170 {
 171    struct pipe_screen *screen = pipe->screen;
 172    struct pipe_transfer *src_trans, *dst_trans;
 173    void *dst_map;
 174    const void *src_map;
 175
 176    assert(src->texture && dst->texture);
 177    if (!src->texture || !dst->texture)
 178       return;
 179    src_trans = screen->get_tex_transfer(screen,
 180                                         src->texture,
 181                                         src->face,
 182                                         src->level,
 183                                         src->zslice,
 184                                         PIPE_TRANSFER_READ,
 185                                         src_x, src_y, w, h);
 186
 187    dst_trans = screen->get_tex_transfer(screen,
 188                                         dst->texture,
 189                                         dst->face,
 190                                         dst->level,
 191                                         dst->zslice,
 192                                         PIPE_TRANSFER_WRITE,
 193                                         dst_x, dst_y, w, h);
 194
 195    assert(dst_trans->block.size == src_trans->block.size);
 196    assert(dst_trans->block.width == src_trans->block.width);
 197    assert(dst_trans->block.height == src_trans->block.height);
 198
 199    src_map = pipe->screen->transfer_map(screen, src_trans);
 200    dst_map = pipe->screen->transfer_map(screen, dst_trans);
 201
 202    assert(src_map);
 203    assert(dst_map);
 204
 205    if (src_map && dst_map) {
 206       /* If do_flip, invert src_y position and pass negative src stride */
 207       pipe_copy_rect(dst_map,
 208                      &dst_trans->block,
 209                      dst_trans->stride,
 210                      0, 0,
 211                      w, h,
 212                      src_map,
 213                      do_flip ? -(int) src_trans->stride : src_trans->stride,
 214                      0,
 215                      do_flip ? h - 1 : 0);
 216    }
 217
 218    pipe->screen->transfer_unmap(pipe->screen, src_trans);
 219    pipe->screen->transfer_unmap(pipe->screen, dst_trans);
 220
 221    screen->tex_transfer_destroy(src_trans);
 222    screen->tex_transfer_destroy(dst_trans);
 223 }
 224
 225
 226
 227 #define UBYTE_TO_USHORT(B) ((B) | ((B) << 8))
 228
 229
 230 /**
 231  * Fallback for pipe->surface_fill() function.
 232  * XXX should probably put this in new u_surface.c file...
 233  */
 234 void
 235 util_surface_fill(struct pipe_context *pipe,
 236                   struct pipe_surface *dst,
 237                   unsigned dstx, unsigned dsty,
 238                   unsigned width, unsigned height, unsigned value)
 239 {
 240    struct pipe_screen *screen = pipe->screen;
 241    struct pipe_transfer *dst_trans;
 242    void *dst_map;
 243
 244    assert(dst->texture);
 245    if (!dst->texture)
 246       return;
 247    dst_trans = screen->get_tex_transfer(screen,
 248                                         dst->texture,
 249                                         dst->face,
 250                                         dst->level,
 251                                         dst->zslice,
 252                                         PIPE_TRANSFER_WRITE,
 253                                         dstx, dsty, width, height);
 254
 255    dst_map = pipe->screen->transfer_map(screen, dst_trans);
 256
 257    assert(dst_map);
 258
 259    if (dst_map) {
 260       assert(dst_trans->stride > 0);
 261
 262       switch (dst_trans->block.size) {
 263       case 1:
 264       case 2:
 265       case 4:
 266          pipe_fill_rect(dst_map, &dst_trans->block, dst_trans->stride,
 267                         0, 0, width, height, value);
 268          break;
 269       case 8:
 270          {
 271             /* expand the 4-byte clear value to an 8-byte value */
 272             ushort *row = (ushort *) dst_map;
 273             ushort val0 = UBYTE_TO_USHORT((value >>  0) & 0xff);
 274             ushort val1 = UBYTE_TO_USHORT((value >>  8) & 0xff);
 275             ushort val2 = UBYTE_TO_USHORT((value >> 16) & 0xff);
 276             ushort val3 = UBYTE_TO_USHORT((value >> 24) & 0xff);
 277             unsigned i, j;
 278             val0 = (val0 << 8) | val0;
 279             val1 = (val1 << 8) | val1;
 280             val2 = (val2 << 8) | val2;
 281             val3 = (val3 << 8) | val3;
 282             for (i = 0; i < height; i++) {
 283                for (j = 0; j < width; j++) {
 284                   row[j*4+0] = val0;
 285                   row[j*4+1] = val1;
 286                   row[j*4+2] = val2;
 287                   row[j*4+3] = val3;
 288                }
 289                row += dst_trans->stride/2;
 290             }
 291          }
 292          break;
 293       default:
 294          assert(0);
 295          break;
 296       }
 297    }
 298
 299    pipe->screen->transfer_unmap(pipe->screen, dst_trans);
 300    screen->tex_transfer_destroy(dst_trans);
 301 }