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  1. /**************************************************************************
  2.  *
  3.  * Copyright 2009 VMware, Inc.
  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 VMWARE 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. /**
  29.  * Functions for converting tiled data to linear and vice versa.
  30.  */
  31.  
  32.  
  33. #ifndef U_LINEAR_H
  34. #define U_LINEAR_H
  35.  
  36. #include "pipe/p_compiler.h"
  37. #include "pipe/p_format.h"
  38.  
  39. struct u_linear_format_block
  40. {
  41.    /** Block size in bytes */
  42.    unsigned size;
  43.    
  44.    /** Block width in pixels */
  45.    unsigned width;
  46.    
  47.    /** Block height in pixels */
  48.    unsigned height;
  49. };
  50.  
  51.  
  52. struct pipe_tile_info
  53. {
  54.    unsigned size;
  55.    unsigned stride;
  56.  
  57.    /* The number of tiles */
  58.    unsigned tiles_x;
  59.    unsigned tiles_y;
  60.  
  61.    /* size of each tile expressed in blocks */
  62.    unsigned cols;
  63.    unsigned rows;
  64.  
  65.    /* Describe the tile in pixels */
  66.    struct u_linear_format_block tile;
  67.  
  68.    /* Describe each block within the tile */
  69.    struct u_linear_format_block block;
  70. };
  71.  
  72. void pipe_linear_to_tile(size_t src_stride, const void *src_ptr,
  73.                          struct pipe_tile_info *t, void  *dst_ptr);
  74.  
  75. void pipe_linear_from_tile(struct pipe_tile_info *t, const void *src_ptr,
  76.                            size_t dst_stride, void *dst_ptr);
  77.  
  78. /**
  79.  * Convenience function to fillout a pipe_tile_info struct.
  80.  * @t info to fill out.
  81.  * @block block info about pixel layout
  82.  * @tile_width the width of the tile in pixels
  83.  * @tile_height the height of the tile in pixels
  84.  * @tiles_x number of tiles in x axis
  85.  * @tiles_y number of tiles in y axis
  86.  */
  87. void pipe_linear_fill_info(struct pipe_tile_info *t,
  88.                            const struct u_linear_format_block *block,
  89.                            unsigned tile_width, unsigned tile_height,
  90.                            unsigned tiles_x, unsigned tiles_y);
  91.  
  92. static INLINE boolean pipe_linear_check_tile(const struct pipe_tile_info *t)
  93. {
  94.    if (t->tile.size != t->block.size * t->cols * t->rows)
  95.       return FALSE;
  96.  
  97.    if (t->stride != t->block.size * t->cols * t->tiles_x)
  98.       return FALSE;
  99.  
  100.    if (t->size < t->stride * t->rows * t->tiles_y)
  101.       return FALSE;
  102.  
  103.    return TRUE;
  104. }
  105.  
  106. #endif /* U_LINEAR_H */
  107.