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mesa: added _mesa_get_format_block_size()

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This commit is contained in:
Brian Paul 2009-10-24 11:33:10 -06:00
parent 51bc12d623
commit 7b16c43e43
2 changed files with 19 additions and 0 deletions
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16
src/mesa/main/formats.c
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@ -753,6 +753,22 @@ _mesa_get_format_base_format(gl_format format)
}
/**
* Return the block size (in pixels) for the given format. Normally
* the block size is 1x1. But compressed formats will have block sizes
* of 4x4 or 8x4 pixels, etc.
* \param bw returns block width in pixels
* \param bh returns block height in pixels
*/
void
_mesa_get_format_block_size(gl_format format, GLuint *bw, GLuint *bh)
{
const struct gl_format_info *info = _mesa_get_format_info(format);
*bw = info->BlockWidth;
*bh = info->BlockHeight;
}
/** Is the given format a compressed format? */
GLboolean
_mesa_is_format_compressed(gl_format format)

3
src/mesa/main/formats.h
View file

@ -155,6 +155,9 @@ _mesa_get_format_datatype(gl_format format);
extern GLenum
_mesa_get_format_base_format(gl_format format);
extern void
_mesa_get_format_block_size(gl_format format, GLuint *bw, GLuint *bh);
extern GLboolean
_mesa_is_format_compressed(gl_format format);