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_util.h"
  30 #include "pipe/p_inlines.h"
  31 #include "pipe/p_winsys.h"
  32 #include "util/p_tile.h"
  33 #include "sp_context.h"
  34 #include "sp_surface.h"
  35
  36
  37
  38 /* Assumes all values are within bounds -- no checking at this level -
  39  * do it higher up if required.
  40  */
  41 static void
  42 sp_surface_copy(struct pipe_context *pipe,
  43                 unsigned do_flip,
  44                 struct pipe_surface *dst,
  45                 unsigned dstx, unsigned dsty,
  46                 struct pipe_surface *src,
  47                 unsigned srcx, unsigned srcy, unsigned width, unsigned height)
  48 {
  49    assert( dst->cpp == src->cpp );
  50
  51    pipe_copy_rect(pipe_surface_map(dst),
  52                   dst->cpp,
  53                   dst->pitch,
  54                   dstx, dsty,
  55                   width, height,
  56                   pipe_surface_map(src),
  57                   do_flip ? -(int) src->pitch : src->pitch,
  58                   srcx, do_flip ? 1 - srcy - height : srcy);
  59
  60    pipe_surface_unmap(src);
  61    pipe_surface_unmap(dst);
  62 }
  63
  64
  65 static void *
  66 get_pointer(struct pipe_surface *dst, void *dst_map, unsigned x, unsigned y)
  67 {
  68    return (char *)dst_map + (y * dst->pitch + x) * dst->cpp;
  69 }
  70
  71
  72 #define UBYTE_TO_USHORT(B) ((B) | ((B) << 8))
  73
  74
  75 /**
  76  * Fill a rectangular sub-region.  Need better logic about when to
  77  * push buffers into AGP - will currently do so whenever possible.
  78  */
  79 static void
  80 sp_surface_fill(struct pipe_context *pipe,
  81                 struct pipe_surface *dst,
  82                 unsigned dstx, unsigned dsty,
  83                 unsigned width, unsigned height, unsigned value)
  84 {
  85    unsigned i, j;
  86    void *dst_map = pipe_surface_map(dst);
  87
  88    assert(dst->pitch > 0);
  89    assert(width <= dst->pitch);
  90
  91
  92    switch (dst->cpp) {
  93    case 1:
  94       {
  95          ubyte *row = get_pointer(dst, dst_map, dstx, dsty);
  96          for (i = 0; i < height; i++) {
  97             memset(row, value, width);
  98          row += dst->pitch;
  99          }
 100       }
 101       break;
 102    case 2:
 103       {
 104          ushort *row = get_pointer(dst, dst_map, dstx, dsty);
 105          for (i = 0; i < height; i++) {
 106             for (j = 0; j < width; j++)
 107                row[j] = (ushort) value;
 108             row += dst->pitch;
 109          }
 110       }
 111       break;
 112    case 4:
 113       {
 114          unsigned *row = get_pointer(dst, dst_map, dstx, dsty);
 115          for (i = 0; i < height; i++) {
 116             for (j = 0; j < width; j++)
 117                row[j] = value;
 118             row += dst->pitch;
 119          }
 120       }
 121       break;
 122    case 8:
 123       {
 124          /* expand the 4-byte clear value to an 8-byte value */
 125          ushort *row = (ushort *) get_pointer(dst, dst_map, dstx, dsty);
 126          ushort val0 = UBYTE_TO_USHORT((value >>  0) & 0xff);
 127          ushort val1 = UBYTE_TO_USHORT((value >>  8) & 0xff);
 128          ushort val2 = UBYTE_TO_USHORT((value >> 16) & 0xff);
 129          ushort val3 = UBYTE_TO_USHORT((value >> 24) & 0xff);
 130          val0 = (val0 << 8) | val0;
 131          val1 = (val1 << 8) | val1;
 132          val2 = (val2 << 8) | val2;
 133          val3 = (val3 << 8) | val3;
 134          for (i = 0; i < height; i++) {
 135             for (j = 0; j < width; j++) {
 136                row[j*4+0] = val0;
 137                row[j*4+1] = val1;
 138                row[j*4+2] = val2;
 139                row[j*4+3] = val3;
 140             }
 141             row += dst->pitch * 4;
 142          }
 143       }
 144       break;
 145    default:
 146       assert(0);
 147       break;
 148    }
 149
 150    pipe_surface_unmap( dst );
 151 }
 152
 153
 154 void
 155 sp_init_surface_functions(struct softpipe_context *sp)
 156 {
 157    sp->pipe.surface_copy = sp_surface_copy;
 158    sp->pipe.surface_fill = sp_surface_fill;
 159 }