diff options
Diffstat (limited to 'src/gallium/auxiliary/util/u_format.h')
-rw-r--r-- | src/gallium/auxiliary/util/u_format.h | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_format.h b/src/gallium/auxiliary/util/u_format.h index 19b902db98..f5e8eec045 100644 --- a/src/gallium/auxiliary/util/u_format.h +++ b/src/gallium/auxiliary/util/u_format.h @@ -147,6 +147,155 @@ const struct util_format_description * util_format_description(enum pipe_format format); +/* + * Format query functions. + */ + +static INLINE boolean +util_format_is_compressed(enum pipe_format format) +{ + const struct util_format_description *desc = util_format_description(format); + + assert(format); + if (!format) { + return FALSE; + } + + return desc->layout == UTIL_FORMAT_LAYOUT_DXT ? TRUE : FALSE; +} + +static INLINE boolean +util_format_is_depth_or_stencil(enum pipe_format format) +{ + const struct util_format_description *desc = util_format_description(format); + + assert(format); + if (!format) { + return FALSE; + } + + return desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS ? TRUE : FALSE; +} + +static INLINE boolean +util_format_is_depth_and_stencil(enum pipe_format format) +{ + const struct util_format_description *desc = util_format_description(format); + + assert(format); + if (!format) { + return FALSE; + } + + if (desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS) { + return FALSE; + } + + return (desc->swizzle[0] != UTIL_FORMAT_SWIZZLE_NONE && + desc->swizzle[1] != UTIL_FORMAT_SWIZZLE_NONE) ? TRUE : FALSE; +} + +/** + * Describe pixel format's block. + * + * @sa http://msdn2.microsoft.com/en-us/library/ms796147.aspx + */ +static INLINE void +util_format_get_block(enum pipe_format format, + struct pipe_format_block *block) +{ + const struct util_format_description *desc = util_format_description(format); + + assert(format); + if (!format) { + block->size = 0; + block->width = 1; + block->height = 1; + return; + } + + block->size = desc->block.bits / 8; + block->width = desc->block.width; + block->height = desc->block.height; +} + +/** + * Return total bits needed for the pixel format. + */ +static INLINE uint +util_format_get_bits(enum pipe_format format) +{ + const struct util_format_description *desc = util_format_description(format); + + assert(format); + if (!format) { + return 0; + } + + return desc->block.bits / (desc->block.width * desc->block.height); +} + +/** + * Return bytes per pixel for the given format. + */ +static INLINE uint +util_format_get_size(enum pipe_format format) +{ + uint bits = util_format_get_bits(format); + + assert(bits % 8 == 0); + + return bits / 8; +} + +static INLINE uint +util_format_get_component_bits(enum pipe_format format, + enum util_format_colorspace colorspace, + uint component) +{ + const struct util_format_description *desc = util_format_description(format); + enum util_format_colorspace desc_colorspace; + + assert(format); + if (!format) { + return 0; + } + + assert(component < 4); + + /* Treat RGB and SRGB as equivalent. */ + if (colorspace == UTIL_FORMAT_COLORSPACE_SRGB) { + colorspace = UTIL_FORMAT_COLORSPACE_RGB; + } + if (desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB) { + desc_colorspace = UTIL_FORMAT_COLORSPACE_RGB; + } else { + desc_colorspace = desc->colorspace; + } + + if (desc_colorspace != colorspace) { + return 0; + } + + switch (desc->swizzle[component]) { + case UTIL_FORMAT_SWIZZLE_X: + return desc->channel[0].size; + case UTIL_FORMAT_SWIZZLE_Y: + return desc->channel[1].size; + case UTIL_FORMAT_SWIZZLE_Z: + return desc->channel[2].size; + case UTIL_FORMAT_SWIZZLE_W: + return desc->channel[3].size; + default: + return 0; + } +} + + +/* + * Format access functions. + */ + void util_format_read_4f(enum pipe_format format, float *dst, unsigned dst_stride, |