workbench/libs/mesa/src/gallium/auxiliary/util/u_linear.c

   1 /**************************************************************************
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   3  * Copyright 2009 VMware, Inc.
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  16  * of the Software.
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  26  **************************************************************************/
  27
  28 /**
  29  * Functions for converting tiled data to linear and vice versa.
  30  */
  31
  32
  33 #include "util/u_debug.h"
  34 #include "u_linear.h"
  35
  36 void
  37 pipe_linear_to_tile(size_t src_stride, const void *src_ptr,
  38                     struct pipe_tile_info *t, void *dst_ptr)
  39 {
  40    int x, y, z;
  41    char *ptr;
  42    size_t bytes = t->cols * t->block.size;
  43    char *dst_ptr2 = (char *) dst_ptr;
  44
  45    assert(pipe_linear_check_tile(t));
  46
  47    /* lets write lineary to the tiled buffer */
  48    for (y = 0; y < t->tiles_y; y++) {
  49       for (x = 0; x < t->tiles_x; x++) {
  50          /* this inner loop could be replace with SSE magic */
  51          ptr = (char*)src_ptr + src_stride * t->rows * y + bytes * x;
  52          for (z = 0; z < t->rows; z++) {
  53             memcpy(dst_ptr2, ptr, bytes);
  54             dst_ptr2 += bytes;
  55             ptr += src_stride;
  56          }
  57       }
  58    }
  59 }
  60
  61 void pipe_linear_from_tile(struct pipe_tile_info *t, const void *src_ptr,
  62                            size_t dst_stride, void *dst_ptr)
  63 {
  64    int x, y, z;
  65    char *ptr;
  66    size_t bytes = t->cols * t->block.size;
  67    const char *src_ptr2 = (const char *) src_ptr;
  68
  69    /* lets read lineary from the tiled buffer */
  70    for (y = 0; y < t->tiles_y; y++) {
  71       for (x = 0; x < t->tiles_x; x++) {
  72          /* this inner loop could be replace with SSE magic */
  73          ptr = (char*)dst_ptr + dst_stride * t->rows * y + bytes * x;
  74          for (z = 0; z < t->rows; z++) {
  75             memcpy(ptr, src_ptr2, bytes);
  76             src_ptr2 += bytes;
  77             ptr += dst_stride;
  78          }
  79       }
  80    }
  81 }
  82
  83 void
  84 pipe_linear_fill_info(struct pipe_tile_info *t,
  85                       const struct u_linear_format_block *block,
  86                       unsigned tile_width, unsigned tile_height,
  87                       unsigned tiles_x, unsigned tiles_y)
  88 {
  89    t->block = *block;
  90
  91    t->tile.width = tile_width;
  92    t->tile.height = tile_height;
  93    t->cols = t->tile.width / t->block.width;
  94    t->rows = t->tile.height / t->block.height;
  95    t->tile.size = t->cols * t->rows * t->block.size;
  96
  97    t->tiles_x = tiles_x;
  98    t->tiles_y = tiles_y;
  99    t->stride = t->cols * t->tiles_x * t->block.size;
 100    t->size = t->tiles_x * t->tiles_y * t->tile.size;
 101 }