diff options
Diffstat (limited to 'src/gallium/include/pipe/p_format.h')
-rw-r--r-- | src/gallium/include/pipe/p_format.h | 123 |
1 files changed, 52 insertions, 71 deletions
diff --git a/src/gallium/include/pipe/p_format.h b/src/gallium/include/pipe/p_format.h index af230809201..e6bba777d34 100644 --- a/src/gallium/include/pipe/p_format.h +++ b/src/gallium/include/pipe/p_format.h @@ -422,10 +422,11 @@ static INLINE uint pf_get_component_bits( enum pipe_format format, uint comp ) return size << (pf_mixed_scale8( format ) * 3); } + /** - * Return total bits needed for the pixel format. + * Return total bits needed for the pixel format per block. */ -static INLINE uint pf_get_bits( enum pipe_format format ) +static INLINE uint pf_get_blocksizebits( enum pipe_format format ) { switch (pf_layout(format)) { case PIPE_FORMAT_LAYOUT_RGBAZS: @@ -441,8 +442,24 @@ static INLINE uint pf_get_bits( enum pipe_format format ) pf_get_component_bits( format, PIPE_FORMAT_COMP_S ); case PIPE_FORMAT_LAYOUT_YCBCR: assert( format == PIPE_FORMAT_YCBCR || format == PIPE_FORMAT_YCBCR_REV ); - /* return effective bits per pixel */ - return 16; + return 32; + case PIPE_FORMAT_LAYOUT_DXT: + switch(format) { + case PIPE_FORMAT_DXT1_RGBA: + case PIPE_FORMAT_DXT1_RGB: + case PIPE_FORMAT_DXT1_SRGBA: + case PIPE_FORMAT_DXT1_SRGB: + return 64; + case PIPE_FORMAT_DXT3_RGBA: + case PIPE_FORMAT_DXT5_RGBA: + case PIPE_FORMAT_DXT3_SRGBA: + case PIPE_FORMAT_DXT5_SRGBA: + return 128; + default: + assert( 0 ); + return 0; + } + default: assert( 0 ); return 0; @@ -450,102 +467,66 @@ static INLINE uint pf_get_bits( enum pipe_format format ) } /** - * Return bytes per pixel for the given format. + * Return bytes per element for the given format. */ -static INLINE uint pf_get_size( enum pipe_format format ) +static INLINE uint pf_get_blocksize( enum pipe_format format ) { - assert(pf_get_bits(format) % 8 == 0); - return pf_get_bits(format) / 8; + assert(pf_get_blocksizebits(format) % 8 == 0); + return pf_get_blocksizebits(format) / 8; } -/** - * Describe accurately the pixel format. - * - * The chars-per-pixel concept falls apart with compressed and yuv images, where - * more than one pixel are coded in a single data block. This structure - * describes that block. - * - * Simple pixel formats are effectively a 1x1xcpp block. - */ -struct pipe_format_block +static INLINE uint pf_get_blockwidth( enum pipe_format format ) { - /** Block size in bytes */ - unsigned size; - - /** Block width in pixels */ - unsigned width; - - /** Block height in pixels */ - unsigned height; -}; + switch (pf_layout(format)) { + case PIPE_FORMAT_LAYOUT_YCBCR: + return 2; + case PIPE_FORMAT_LAYOUT_DXT: + return 4; + default: + return 1; + } +} -/** - * Describe pixel format's block. - * - * @sa http://msdn2.microsoft.com/en-us/library/ms796147.aspx - */ -static INLINE void -pf_get_block(enum pipe_format format, struct pipe_format_block *block) +static INLINE uint pf_get_blockheight( enum pipe_format format ) { - switch(format) { - case PIPE_FORMAT_DXT1_RGBA: - case PIPE_FORMAT_DXT1_RGB: - case PIPE_FORMAT_DXT1_SRGBA: - case PIPE_FORMAT_DXT1_SRGB: - block->size = 8; - block->width = 4; - block->height = 4; - break; - case PIPE_FORMAT_DXT3_RGBA: - case PIPE_FORMAT_DXT5_RGBA: - case PIPE_FORMAT_DXT3_SRGBA: - case PIPE_FORMAT_DXT5_SRGBA: - block->size = 16; - block->width = 4; - block->height = 4; - break; - case PIPE_FORMAT_YCBCR: - case PIPE_FORMAT_YCBCR_REV: - block->size = 4; /* 2*cpp */ - block->width = 2; - block->height = 1; - break; + switch (pf_layout(format)) { + case PIPE_FORMAT_LAYOUT_DXT: + return 4; default: - block->size = pf_get_size(format); - block->width = 1; - block->height = 1; - break; + return 1; } } static INLINE unsigned -pf_get_nblocksx(const struct pipe_format_block *block, unsigned x) +pf_get_nblocksx(enum pipe_format format, unsigned x) { - return (x + block->width - 1)/block->width; + unsigned blockwidth = pf_get_blockwidth(format); + return (x + blockwidth - 1) / blockwidth; } static INLINE unsigned -pf_get_nblocksy(const struct pipe_format_block *block, unsigned y) +pf_get_nblocksy(enum pipe_format format, unsigned y) { - return (y + block->height - 1)/block->height; + unsigned blockheight = pf_get_blockheight(format); + return (y + blockheight - 1) / blockheight; } static INLINE unsigned -pf_get_nblocks(const struct pipe_format_block *block, unsigned width, unsigned height) +pf_get_nblocks(enum pipe_format format, unsigned width, unsigned height) { - return pf_get_nblocksx(block, width)*pf_get_nblocksy(block, height); + return pf_get_nblocksx(format, width) * pf_get_nblocksy(format, height); } static INLINE size_t -pf_get_stride(const struct pipe_format_block *block, unsigned width) +pf_get_stride(enum pipe_format format, unsigned width) { - return pf_get_nblocksx(block, width)*block->size; + return pf_get_nblocksx(format, width) * pf_get_blocksize(format); } static INLINE size_t -pf_get_2d_size(const struct pipe_format_block *block, size_t stride, unsigned height) +pf_get_2d_size(enum pipe_format format, size_t stride, unsigned height) { - return pf_get_nblocksy(block, height)*stride; + return pf_get_nblocksy(format, height) * stride; } static INLINE boolean |