src/gallium/auxiliary/util/u_linear.c

   1
   2 #include "pipe/p_debug.h"
   3 #include "u_linear.h"
   4
   5 void
   6 pipe_linear_to_tile(size_t src_stride, void *src_ptr,
   7                     struct pipe_tile_info *t, void *dst_ptr)
   8 {
   9    int x, y, z;
  10    char *ptr;
  11    size_t bytes = t->cols * t->block.size;
  12
  13
  14    assert(pipe_linear_check_tile(t));
  15
  16    /* lets write lineary to the tiled buffer */
  17    for (y = 0; y < t->tiles_y; y++) {
  18       for (x = 0; x < t->tiles_x; x++) {
  19          /* this inner loop could be replace with SSE magic */
  20          ptr = (char*)src_ptr + src_stride * t->rows * y + bytes * x;
  21          for (z = 0; z < t->rows; z++) {
  22             memcpy(dst_ptr, ptr, bytes);
  23             dst_ptr += bytes;
  24             ptr += src_stride;
  25          }
  26       }
  27    }
  28 }
  29
  30 void pipe_linear_from_tile(struct pipe_tile_info *t, void  *src_ptr,
  31                            size_t dst_stride, void *dst_ptr)
  32 {
  33    int x, y, z;
  34    char *ptr;
  35    size_t bytes = t->cols * t->block.size;
  36
  37    /* lets read lineary from the tiled buffer */
  38    for (y = 0; y < t->tiles_y; y++) {
  39       for (x = 0; x < t->tiles_x; x++) {
  40          /* this inner loop could be replace with SSE magic */
  41          ptr = (char*)dst_ptr + dst_stride * t->rows * y + bytes * x;
  42          for (z = 0; z < t->rows; z++) {
  43             memcpy(ptr, src_ptr, bytes);
  44             src_ptr += bytes;
  45             ptr += dst_stride;
  46          }
  47       }
  48    }
  49 }
  50
  51 void
  52 pipe_linear_fill_info(struct pipe_tile_info *t,
  53                       struct pipe_format_block *block,
  54                       unsigned tile_width, unsigned tile_height,
  55                       unsigned tiles_x, unsigned tiles_y)
  56 {
  57    t->block = *block;
  58
  59    t->tile.width = tile_width;
  60    t->tile.height = tile_height;
  61    t->cols = t->tile.width / t->block.width;
  62    t->rows = t->tile.height / t->block.height;
  63    t->tile.size = t->cols * t->rows * t->block.size;
  64
  65    t->tiles_x = tiles_x;
  66    t->tiles_y = tiles_y;
  67    t->stride = t->cols * t->tiles_x * t->block.size;
  68    t->size = t->tiles_x * t->tiles_y * t->tile.size;
  69 }