src/gallium/auxiliary/util/u_linear.h

   1
   2 #ifndef U_LINEAR_H
   3 #define U_LINEAR_H
   4
   5 #include "pipe/p_format.h"
   6
   7 struct pipe_tile_info
   8 {
   9    unsigned size;
  10    unsigned stride;
  11
  12    /* The number of tiles */
  13    unsigned tiles_x;
  14    unsigned tiles_y;
  15
  16    /* size of each tile expressed in blocks */
  17    unsigned cols;
  18    unsigned rows;
  19
  20    /* Describe the tile in pixels */
  21    struct pipe_format_block tile;
  22
  23    /* Describe each block within the tile */
  24    struct pipe_format_block block;
  25 };
  26
  27 void pipe_linear_to_tile(size_t src_stride, const void *src_ptr,
  28                          struct pipe_tile_info *t, void  *dst_ptr);
  29
  30 void pipe_linear_from_tile(struct pipe_tile_info *t, const void *src_ptr,
  31                            size_t dst_stride, void *dst_ptr);
  32
  33 /**
  34  * Convenience function to fillout a pipe_tile_info struct.
  35  * @t info to fill out.
  36  * @block block info about pixel layout
  37  * @tile_width the width of the tile in pixels
  38  * @tile_height the height of the tile in pixels
  39  * @tiles_x number of tiles in x axis
  40  * @tiles_y number of tiles in y axis
  41  */
  42 void pipe_linear_fill_info(struct pipe_tile_info *t,
  43                            const struct pipe_format_block *block,
  44                            unsigned tile_width, unsigned tile_height,
  45                            unsigned tiles_x, unsigned tiles_y);
  46
  47 static INLINE boolean pipe_linear_check_tile(const struct pipe_tile_info *t)
  48 {
  49    if (t->tile.size != t->block.size * t->cols * t->rows)
  50       return FALSE;
  51
  52    if (t->stride != t->block.size * t->cols * t->tiles_x)
  53       return FALSE;
  54
  55    if (t->size < t->stride * t->rows * t->tiles_y)
  56       return FALSE;
  57
  58    return TRUE;
  59 }
  60
  61 #endif /* U_LINEAR_H */