src/gallium/drivers/softpipe/sp_surface.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 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 #include "pipe/p_defines.h"
  29 #include "pipe/p_inlines.h"
  30 #include "pipe/p_winsys.h"
  31 #include "util/u_tile.h"
  32 #include "util/u_rect.h"
  33 #include "sp_context.h"
  34 #include "sp_surface.h"
  35
  36
  37
  38 /**
  39  * Copy a rectangular region from one surface to another.
  40  * Surfaces must have same bpp.
  41  *
  42  * Note that it's always the case that Y=0=top of the raster.
  43  * If do_flip is non-zero, the region being copied will be flipped vertically.
  44  *
  45  * Assumes all values are within bounds -- no checking at this level -
  46  * do it higher up if required.
  47  */
  48 static void
  49 sp_surface_copy(struct pipe_context *pipe,
  50                 boolean do_flip,
  51                 struct pipe_surface *dst,
  52                 unsigned dstx, unsigned dsty,
  53                 struct pipe_surface *src,
  54                 unsigned srcx, unsigned srcy, unsigned width, unsigned height)
  55 {
  56    void *dst_map = pipe->screen->surface_map( pipe->screen,
  57                                               dst,
  58                                               PIPE_BUFFER_USAGE_CPU_WRITE );
  59
  60    const void *src_map = pipe->screen->surface_map( pipe->screen,
  61                                                     src,
  62                                                     PIPE_BUFFER_USAGE_CPU_READ );
  63
  64    assert(dst->block.size == src->block.size);
  65    assert(dst->block.width == src->block.width);
  66    assert(dst->block.height == src->block.height);
  67    assert(src_map);
  68    assert(dst_map);
  69
  70    /* If do_flip, invert src_y position and pass negative src stride */
  71    pipe_copy_rect(dst_map,
  72                   &dst->block,
  73                   dst->stride,
  74                   dstx, dsty,
  75                   width, height,
  76                   src_map,
  77                   do_flip ? -(int) src->stride : src->stride,
  78                   srcx, srcy);
  79
  80    pipe->screen->surface_unmap(pipe->screen, src);
  81    pipe->screen->surface_unmap(pipe->screen, dst);
  82 }
  83
  84
  85 static void *
  86 get_pointer(struct pipe_surface *dst, void *dst_map, unsigned x, unsigned y)
  87 {
  88    return (char *)dst_map + y / dst->block.height * dst->stride + x / dst->block.width * dst->block.size;
  89 }
  90
  91
  92 #define UBYTE_TO_USHORT(B) ((B) | ((B) << 8))
  93
  94
  95 /**
  96  * Fill a rectangular sub-region.  Need better logic about when to
  97  * push buffers into AGP - will currently do so whenever possible.
  98  */
  99 static void
 100 sp_surface_fill(struct pipe_context *pipe,
 101                 struct pipe_surface *dst,
 102                 unsigned dstx, unsigned dsty,
 103                 unsigned width, unsigned height, unsigned value)
 104 {
 105    unsigned i, j;
 106    void *dst_map = pipe->screen->surface_map( pipe->screen,
 107                                               dst,
 108                                               PIPE_BUFFER_USAGE_CPU_WRITE );
 109
 110    assert(dst->stride > 0);
 111
 112
 113    switch (dst->block.size) {
 114    case 1:
 115    case 2:
 116    case 4:
 117       pipe_fill_rect(dst_map, &dst->block, dst->stride, dstx, dsty, width, height, value);
 118       break;
 119    case 8:
 120       {
 121          /* expand the 4-byte clear value to an 8-byte value */
 122          ushort *row = (ushort *) get_pointer(dst, dst_map, dstx, dsty);
 123          ushort val0 = UBYTE_TO_USHORT((value >>  0) & 0xff);
 124          ushort val1 = UBYTE_TO_USHORT((value >>  8) & 0xff);
 125          ushort val2 = UBYTE_TO_USHORT((value >> 16) & 0xff);
 126          ushort val3 = UBYTE_TO_USHORT((value >> 24) & 0xff);
 127          val0 = (val0 << 8) | val0;
 128          val1 = (val1 << 8) | val1;
 129          val2 = (val2 << 8) | val2;
 130          val3 = (val3 << 8) | val3;
 131          for (i = 0; i < height; i++) {
 132             for (j = 0; j < width; j++) {
 133                row[j*4+0] = val0;
 134                row[j*4+1] = val1;
 135                row[j*4+2] = val2;
 136                row[j*4+3] = val3;
 137             }
 138             row += dst->stride/2;
 139          }
 140       }
 141       break;
 142    default:
 143       assert(0);
 144       break;
 145    }
 146
 147    pipe->screen->surface_unmap(pipe->screen, dst);
 148 }
 149
 150
 151 void
 152 sp_init_surface_functions(struct softpipe_context *sp)
 153 {
 154    sp->pipe.surface_copy = sp_surface_copy;
 155    sp->pipe.surface_fill = sp_surface_fill;
 156 }