--- /dev/null
+/**************************************************************************
+ *
+ * Copyright 2009-2010 Vmware, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+
+#ifndef U_FORMAT_H
+#define U_FORMAT_H
+
+
+#include "pipe/p_format.h"
+#include "pipe/p_defines.h"
+#include "util/u_debug.h"
+
+union pipe_color_union;
+struct pipe_screen;
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/**
+ * Describe how to pack/unpack pixels into/from the prescribed format.
+ *
+ * XXX: This could be renamed to something like util_format_pack, or broke down
+ * in flags inside util_format_block that said exactly what we want.
+ */
+enum util_format_layout {
+ /**
+ * Formats with util_format_block::width == util_format_block::height == 1
+ * that can be described as an ordinary data structure.
+ */
+ UTIL_FORMAT_LAYOUT_PLAIN,
+
+ /**
+ * Formats with sub-sampled channels.
+ *
+ * This is for formats like YVYU where there is less than one sample per
+ * pixel.
+ */
+ UTIL_FORMAT_LAYOUT_SUBSAMPLED,
+
+ /**
+ * S3 Texture Compression formats.
+ */
+ UTIL_FORMAT_LAYOUT_S3TC,
+
+ /**
+ * Red-Green Texture Compression formats.
+ */
+ UTIL_FORMAT_LAYOUT_RGTC,
+
+ /**
+ * Ericsson Texture Compression
+ */
+ UTIL_FORMAT_LAYOUT_ETC,
+
+ /**
+ * BC6/7 Texture Compression
+ */
+ UTIL_FORMAT_LAYOUT_BPTC,
+
+ UTIL_FORMAT_LAYOUT_ASTC,
+
+ UTIL_FORMAT_LAYOUT_ATC,
+
+ /** Formats with 2 or more planes. */
+ UTIL_FORMAT_LAYOUT_PLANAR2,
+ UTIL_FORMAT_LAYOUT_PLANAR3,
+
+ UTIL_FORMAT_LAYOUT_FXT1 = 10,
+
+ /**
+ * Everything else that doesn't fit in any of the above layouts.
+ */
+ UTIL_FORMAT_LAYOUT_OTHER,
+};
+
+
+struct util_format_block
+{
+ /** Block width in pixels */
+ unsigned width;
+
+ /** Block height in pixels */
+ unsigned height;
+
+ /** Block depth in pixels */
+ unsigned depth;
+
+ /** Block size in bits */
+ unsigned bits;
+};
+
+
+enum util_format_type {
+ UTIL_FORMAT_TYPE_VOID = 0,
+ UTIL_FORMAT_TYPE_UNSIGNED = 1,
+ UTIL_FORMAT_TYPE_SIGNED = 2,
+ UTIL_FORMAT_TYPE_FIXED = 3,
+ UTIL_FORMAT_TYPE_FLOAT = 4
+};
+
+
+enum util_format_colorspace {
+ UTIL_FORMAT_COLORSPACE_RGB = 0,
+ UTIL_FORMAT_COLORSPACE_SRGB = 1,
+ UTIL_FORMAT_COLORSPACE_YUV = 2,
+ UTIL_FORMAT_COLORSPACE_ZS = 3
+};
+
+
+struct util_format_channel_description
+{
+ unsigned type:5; /**< UTIL_FORMAT_TYPE_x */
+ unsigned normalized:1;
+ unsigned pure_integer:1;
+ unsigned size:9; /**< bits per channel */
+ unsigned shift:16; /** number of bits from lsb */
+};
+
+
+struct util_format_description
+{
+ enum pipe_format format;
+
+ const char *name;
+
+ /**
+ * Short name, striped of the prefix, lower case.
+ */
+ const char *short_name;
+
+ /**
+ * Pixel block dimensions.
+ */
+ struct util_format_block block;
+
+ enum util_format_layout layout;
+
+ /**
+ * The number of channels.
+ */
+ unsigned nr_channels:3;
+
+ /**
+ * Whether all channels have the same number of (whole) bytes and type.
+ */
+ unsigned is_array:1;
+
+ /**
+ * Whether the pixel format can be described as a bitfield structure.
+ *
+ * In particular:
+ * - pixel depth must be 8, 16, or 32 bits;
+ * - all channels must be unsigned, signed, or void
+ */
+ unsigned is_bitmask:1;
+
+ /**
+ * Whether channels have mixed types (ignoring UTIL_FORMAT_TYPE_VOID).
+ */
+ unsigned is_mixed:1;
+
+ /**
+ * Whether the format contains UNORM channels
+ */
+ unsigned is_unorm:1;
+
+ /**
+ * Whether the format contains SNORM channels
+ */
+ unsigned is_snorm:1;
+
+ /**
+ * Input channel description, in the order XYZW.
+ *
+ * Only valid for UTIL_FORMAT_LAYOUT_PLAIN formats.
+ *
+ * If each channel is accessed as an individual N-byte value, X is always
+ * at the lowest address in memory, Y is always next, and so on. For all
+ * currently-defined formats, the N-byte value has native endianness.
+ *
+ * If instead a group of channels is accessed as a single N-byte value,
+ * the order of the channels within that value depends on endianness.
+ * For big-endian targets, X is the most significant subvalue,
+ * otherwise it is the least significant one.
+ *
+ * For example, if X is 8 bits and Y is 24 bits, the memory order is:
+ *
+ * 0 1 2 3
+ * little-endian: X Yl Ym Yu (l = lower, m = middle, u = upper)
+ * big-endian: X Yu Ym Yl
+ *
+ * If X is 5 bits, Y is 5 bits, Z is 5 bits and W is 1 bit, the layout is:
+ *
+ * 0 1
+ * msb lsb msb lsb
+ * little-endian: YYYXXXXX WZZZZZYY
+ * big-endian: XXXXXYYY YYZZZZZW
+ */
+ struct util_format_channel_description channel[4];
+
+ /**
+ * Output channel swizzle.
+ *
+ * The order is either:
+ * - RGBA
+ * - YUV(A)
+ * - ZS
+ * depending on the colorspace.
+ */
+ unsigned char swizzle[4];
+
+ /**
+ * Colorspace transformation.
+ */
+ enum util_format_colorspace colorspace;
+
+ /**
+ * Unpack pixel blocks to R8G8B8A8_UNORM.
+ * Note: strides are in bytes.
+ *
+ * Only defined for non-depth-stencil formats.
+ */
+ void
+ (*unpack_rgba_8unorm)(uint8_t *dst, unsigned dst_stride,
+ const uint8_t *src, unsigned src_stride,
+ unsigned width, unsigned height);
+
+ /**
+ * Pack pixel blocks from R8G8B8A8_UNORM.
+ * Note: strides are in bytes.
+ *
+ * Only defined for non-depth-stencil formats.
+ */
+ void
+ (*pack_rgba_8unorm)(uint8_t *dst, unsigned dst_stride,
+ const uint8_t *src, unsigned src_stride,
+ unsigned width, unsigned height);
+
+ /**
+ * Fetch a single pixel (i, j) from a block.
+ *
+ * XXX: Only defined for a very few select formats.
+ */
+ void
+ (*fetch_rgba_8unorm)(uint8_t *dst,
+ const uint8_t *src,
+ unsigned i, unsigned j);
+
+ /**
+ * Unpack pixel blocks to R32G32B32A32_FLOAT.
+ * Note: strides are in bytes.
+ *
+ * Only defined for non-depth-stencil formats.
+ */
+ void
+ (*unpack_rgba_float)(float *dst, unsigned dst_stride,
+ const uint8_t *src, unsigned src_stride,
+ unsigned width, unsigned height);
+
+ /**
+ * Pack pixel blocks from R32G32B32A32_FLOAT.
+ * Note: strides are in bytes.
+ *
+ * Only defined for non-depth-stencil formats.
+ */
+ void
+ (*pack_rgba_float)(uint8_t *dst, unsigned dst_stride,
+ const float *src, unsigned src_stride,
+ unsigned width, unsigned height);
+
+ /**
+ * Fetch a single pixel (i, j) from a block.
+ *
+ * Only defined for non-depth-stencil and non-integer formats.
+ */
+ void
+ (*fetch_rgba_float)(float *dst,
+ const uint8_t *src,
+ unsigned i, unsigned j);
+
+ /**
+ * Unpack pixels to Z32_UNORM.
+ * Note: strides are in bytes.
+ *
+ * Only defined for depth formats.
+ */
+ void
+ (*unpack_z_32unorm)(uint32_t *dst, unsigned dst_stride,
+ const uint8_t *src, unsigned src_stride,
+ unsigned width, unsigned height);
+
+ /**
+ * Pack pixels from Z32_FLOAT.
+ * Note: strides are in bytes.
+ *
+ * Only defined for depth formats.
+ */
+ void
+ (*pack_z_32unorm)(uint8_t *dst, unsigned dst_stride,
+ const uint32_t *src, unsigned src_stride,
+ unsigned width, unsigned height);
+
+ /**
+ * Unpack pixels to Z32_FLOAT.
+ * Note: strides are in bytes.
+ *
+ * Only defined for depth formats.
+ */
+ void
+ (*unpack_z_float)(float *dst, unsigned dst_stride,
+ const uint8_t *src, unsigned src_stride,
+ unsigned width, unsigned height);
+
+ /**
+ * Pack pixels from Z32_FLOAT.
+ * Note: strides are in bytes.
+ *
+ * Only defined for depth formats.
+ */
+ void
+ (*pack_z_float)(uint8_t *dst, unsigned dst_stride,
+ const float *src, unsigned src_stride,
+ unsigned width, unsigned height);
+
+ /**
+ * Unpack pixels to S8_UINT.
+ * Note: strides are in bytes.
+ *
+ * Only defined for stencil formats.
+ */
+ void
+ (*unpack_s_8uint)(uint8_t *dst, unsigned dst_stride,
+ const uint8_t *src, unsigned src_stride,
+ unsigned width, unsigned height);
+
+ /**
+ * Pack pixels from S8_UINT.
+ * Note: strides are in bytes.
+ *
+ * Only defined for stencil formats.
+ */
+ void
+ (*pack_s_8uint)(uint8_t *dst, unsigned dst_stride,
+ const uint8_t *src, unsigned src_stride,
+ unsigned width, unsigned height);
+
+ /**
+ * Unpack pixel blocks to R32G32B32A32_UINT.
+ * Note: strides are in bytes.
+ *
+ * Only defined for INT formats.
+ */
+ void
+ (*unpack_rgba_uint)(uint32_t *dst, unsigned dst_stride,
+ const uint8_t *src, unsigned src_stride,
+ unsigned width, unsigned height);
+
+ void
+ (*pack_rgba_uint)(uint8_t *dst, unsigned dst_stride,
+ const uint32_t *src, unsigned src_stride,
+ unsigned width, unsigned height);
+
+ /**
+ * Unpack pixel blocks to R32G32B32A32_SINT.
+ * Note: strides are in bytes.
+ *
+ * Only defined for INT formats.
+ */
+ void
+ (*unpack_rgba_sint)(int32_t *dst, unsigned dst_stride,
+ const uint8_t *src, unsigned src_stride,
+ unsigned width, unsigned height);
+
+ void
+ (*pack_rgba_sint)(uint8_t *dst, unsigned dst_stride,
+ const int32_t *src, unsigned src_stride,
+ unsigned width, unsigned height);
+
+ /**
+ * Fetch a single pixel (i, j) from a block.
+ *
+ * Only defined for unsigned (pure) integer formats.
+ */
+ void
+ (*fetch_rgba_uint)(uint32_t *dst,
+ const uint8_t *src,
+ unsigned i, unsigned j);
+
+ /**
+ * Fetch a single pixel (i, j) from a block.
+ *
+ * Only defined for signed (pure) integer formats.
+ */
+ void
+ (*fetch_rgba_sint)(int32_t *dst,
+ const uint8_t *src,
+ unsigned i, unsigned j);
+};
+
+
+extern const struct util_format_description
+util_format_description_table[];
+
+
+const struct util_format_description *
+util_format_description(enum pipe_format format);
+
+
+/*
+ * Format query functions.
+ */
+
+static inline const char *
+util_format_name(enum pipe_format format)
+{
+ const struct util_format_description *desc = util_format_description(format);
+
+ assert(desc);
+ if (!desc) {
+ return "PIPE_FORMAT_???";
+ }
+
+ return desc->name;
+}
+
+static inline const char *
+util_format_short_name(enum pipe_format format)
+{
+ const struct util_format_description *desc = util_format_description(format);
+
+ assert(desc);
+ if (!desc) {
+ return "???";
+ }
+
+ return desc->short_name;
+}
+
+/**
+ * Whether this format is plain, see UTIL_FORMAT_LAYOUT_PLAIN for more info.
+ */
+static inline boolean
+util_format_is_plain(enum pipe_format format)
+{
+ const struct util_format_description *desc = util_format_description(format);
+
+ if (!format) {
+ return FALSE;
+ }
+
+ return desc->layout == UTIL_FORMAT_LAYOUT_PLAIN ? TRUE : FALSE;
+}
+
+static inline boolean
+util_format_is_compressed(enum pipe_format format)
+{
+ const struct util_format_description *desc = util_format_description(format);
+
+ assert(desc);
+ if (!desc) {
+ return FALSE;
+ }
+
+ switch (desc->layout) {
+ case UTIL_FORMAT_LAYOUT_S3TC:
+ case UTIL_FORMAT_LAYOUT_RGTC:
+ case UTIL_FORMAT_LAYOUT_ETC:
+ case UTIL_FORMAT_LAYOUT_BPTC:
+ case UTIL_FORMAT_LAYOUT_ASTC:
+ case UTIL_FORMAT_LAYOUT_ATC:
+ /* XXX add other formats in the future */
+ return TRUE;
+ default:
+ return FALSE;
+ }
+}
+
+static inline boolean
+util_format_is_s3tc(enum pipe_format format)
+{
+ const struct util_format_description *desc = util_format_description(format);
+
+ assert(desc);
+ if (!desc) {
+ return FALSE;
+ }
+
+ return desc->layout == UTIL_FORMAT_LAYOUT_S3TC ? TRUE : FALSE;
+}
+
+static inline boolean
+util_format_is_etc(enum pipe_format format)
+{
+ const struct util_format_description *desc = util_format_description(format);
+
+ assert(desc);
+ if (!desc) {
+ return FALSE;
+ }
+
+ return desc->layout == UTIL_FORMAT_LAYOUT_ETC ? TRUE : FALSE;
+}
+
+static inline boolean
+util_format_is_srgb(enum pipe_format format)
+{
+ const struct util_format_description *desc = util_format_description(format);
+ return desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB;
+}
+
+static inline boolean
+util_format_has_depth(const struct util_format_description *desc)
+{
+ return desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS &&
+ desc->swizzle[0] != PIPE_SWIZZLE_NONE;
+}
+
+static inline boolean
+util_format_has_stencil(const struct util_format_description *desc)
+{
+ return desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS &&
+ desc->swizzle[1] != PIPE_SWIZZLE_NONE;
+}
+
+static inline boolean
+util_format_is_depth_or_stencil(enum pipe_format format)
+{
+ const struct util_format_description *desc = util_format_description(format);
+
+ assert(desc);
+ if (!desc) {
+ return FALSE;
+ }
+
+ return util_format_has_depth(desc) ||
+ util_format_has_stencil(desc);
+}
+
+static inline boolean
+util_format_is_depth_and_stencil(enum pipe_format format)
+{
+ const struct util_format_description *desc = util_format_description(format);
+
+ assert(desc);
+ if (!desc) {
+ return FALSE;
+ }
+
+ return util_format_has_depth(desc) &&
+ util_format_has_stencil(desc);
+}
+
+/**
+ * For depth-stencil formats, return the equivalent depth-only format.
+ */
+static inline enum pipe_format
+util_format_get_depth_only(enum pipe_format format)
+{
+ switch (format) {
+ case PIPE_FORMAT_Z24_UNORM_S8_UINT:
+ return PIPE_FORMAT_Z24X8_UNORM;
+
+ case PIPE_FORMAT_S8_UINT_Z24_UNORM:
+ return PIPE_FORMAT_X8Z24_UNORM;
+
+ case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
+ return PIPE_FORMAT_Z32_FLOAT;
+
+ default:
+ return format;
+ }
+}
+
+static inline boolean
+util_format_is_yuv(enum pipe_format format)
+{
+ const struct util_format_description *desc = util_format_description(format);
+
+ assert(desc);
+ if (!desc) {
+ return FALSE;
+ }
+
+ return desc->colorspace == UTIL_FORMAT_COLORSPACE_YUV;
+}
+
+/**
+ * Calculates the depth format type based upon the incoming format description.
+ */
+static inline unsigned
+util_get_depth_format_type(const struct util_format_description *desc)
+{
+ unsigned depth_channel = desc->swizzle[0];
+ if (desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS &&
+ depth_channel != PIPE_SWIZZLE_NONE) {
+ return desc->channel[depth_channel].type;
+ } else {
+ return UTIL_FORMAT_TYPE_VOID;
+ }
+}
+
+
+/**
+ * Calculates the MRD for the depth format. MRD is used in depth bias
+ * for UNORM and unbound depth buffers. When the depth buffer is floating
+ * point, the depth bias calculation does not use the MRD. However, the
+ * default MRD will be 1.0 / ((1 << 24) - 1).
+ */
+double
+util_get_depth_format_mrd(const struct util_format_description *desc);
+
+
+/**
+ * Return whether this is an RGBA, Z, S, or combined ZS format.
+ * Useful for initializing pipe_blit_info::mask.
+ */
+static inline unsigned
+util_format_get_mask(enum pipe_format format)
+{
+ const struct util_format_description *desc =
+ util_format_description(format);
+
+ if (!desc)
+ return 0;
+
+ if (util_format_has_depth(desc)) {
+ if (util_format_has_stencil(desc)) {
+ return PIPE_MASK_ZS;
+ } else {
+ return PIPE_MASK_Z;
+ }
+ } else {
+ if (util_format_has_stencil(desc)) {
+ return PIPE_MASK_S;
+ } else {
+ return PIPE_MASK_RGBA;
+ }
+ }
+}
+
+/**
+ * Give the RGBA colormask of the channels that can be represented in this
+ * format.
+ *
+ * That is, the channels whose values are preserved.
+ */
+static inline unsigned
+util_format_colormask(const struct util_format_description *desc)
+{
+ unsigned colormask;
+ unsigned chan;
+
+ switch (desc->colorspace) {
+ case UTIL_FORMAT_COLORSPACE_RGB:
+ case UTIL_FORMAT_COLORSPACE_SRGB:
+ case UTIL_FORMAT_COLORSPACE_YUV:
+ colormask = 0;
+ for (chan = 0; chan < 4; ++chan) {
+ if (desc->swizzle[chan] < 4) {
+ colormask |= (1 << chan);
+ }
+ }
+ return colormask;
+ case UTIL_FORMAT_COLORSPACE_ZS:
+ return 0;
+ default:
+ assert(0);
+ return 0;
+ }
+}
+
+
+/**
+ * Checks if color mask covers every channel for the specified format
+ *
+ * @param desc a format description to check colormask with
+ * @param colormask a bit mask for channels, matches format of PIPE_MASK_RGBA
+ */
+static inline boolean
+util_format_colormask_full(const struct util_format_description *desc, unsigned colormask)
+{
+ return (~colormask & util_format_colormask(desc)) == 0;
+}
+
+
+boolean
+util_format_is_float(enum pipe_format format);
+
+
+boolean
+util_format_has_alpha(enum pipe_format format);
+
+
+boolean
+util_format_is_luminance(enum pipe_format format);
+
+boolean
+util_format_is_alpha(enum pipe_format format);
+
+boolean
+util_format_is_luminance_alpha(enum pipe_format format);
+
+
+boolean
+util_format_is_intensity(enum pipe_format format);
+
+boolean
+util_format_is_subsampled_422(enum pipe_format format);
+
+boolean
+util_format_is_pure_integer(enum pipe_format format);
+
+boolean
+util_format_is_pure_sint(enum pipe_format format);
+
+boolean
+util_format_is_pure_uint(enum pipe_format format);
+
+boolean
+util_format_is_snorm(enum pipe_format format);
+
+boolean
+util_format_is_unorm(enum pipe_format format);
+
+boolean
+util_format_is_snorm8(enum pipe_format format);
+
+/**
+ * Check if the src format can be blitted to the destination format with
+ * a simple memcpy. For example, blitting from RGBA to RGBx is OK, but not
+ * the reverse.
+ */
+boolean
+util_is_format_compatible(const struct util_format_description *src_desc,
+ const struct util_format_description *dst_desc);
+
+/**
+ * Whether this format is a rgab8 variant.
+ *
+ * That is, any format that matches the
+ *
+ * PIPE_FORMAT_?8?8?8?8_UNORM
+ */
+static inline boolean
+util_format_is_rgba8_variant(const struct util_format_description *desc)
+{
+ unsigned chan;
+
+ if(desc->block.width != 1 ||
+ desc->block.height != 1 ||
+ desc->block.bits != 32)
+ return FALSE;
+
+ for(chan = 0; chan < 4; ++chan) {
+ if(desc->channel[chan].type != UTIL_FORMAT_TYPE_UNSIGNED &&
+ desc->channel[chan].type != UTIL_FORMAT_TYPE_VOID)
+ return FALSE;
+ if(desc->channel[chan].type == UTIL_FORMAT_TYPE_UNSIGNED &&
+ !desc->channel[chan].normalized)
+ return FALSE;
+ if(desc->channel[chan].size != 8)
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+/**
+ * Return total bits needed for the pixel format per block.
+ */
+static inline uint
+util_format_get_blocksizebits(enum pipe_format format)
+{
+ const struct util_format_description *desc = util_format_description(format);
+
+ assert(desc);
+ if (!desc) {
+ return 0;
+ }
+
+ return desc->block.bits;
+}
+
+/**
+ * Return bytes per block (not pixel) for the given format.
+ */
+static inline uint
+util_format_get_blocksize(enum pipe_format format)
+{
+ uint bits = util_format_get_blocksizebits(format);
+ uint bytes = bits / 8;
+
+ assert(bits % 8 == 0);
+ assert(bytes > 0);
+ if (bytes == 0) {
+ bytes = 1;
+ }
+
+ return bytes;
+}
+
+static inline uint
+util_format_get_blockwidth(enum pipe_format format)
+{
+ const struct util_format_description *desc = util_format_description(format);
+
+ assert(desc);
+ if (!desc) {
+ return 1;
+ }
+
+ return desc->block.width;
+}
+
+static inline uint
+util_format_get_blockheight(enum pipe_format format)
+{
+ const struct util_format_description *desc = util_format_description(format);
+
+ assert(desc);
+ if (!desc) {
+ return 1;
+ }
+
+ return desc->block.height;
+}
+
+static inline uint
+util_format_get_blockdepth(enum pipe_format format)
+{
+ const struct util_format_description *desc = util_format_description(format);
+
+ assert(desc);
+ if (!desc) {
+ return 1;
+ }
+
+ return desc->block.depth;
+}
+
+static inline unsigned
+util_format_get_nblocksx(enum pipe_format format,
+ unsigned x)
+{
+ unsigned blockwidth = util_format_get_blockwidth(format);
+ return (x + blockwidth - 1) / blockwidth;
+}
+
+static inline unsigned
+util_format_get_nblocksy(enum pipe_format format,
+ unsigned y)
+{
+ unsigned blockheight = util_format_get_blockheight(format);
+ return (y + blockheight - 1) / blockheight;
+}
+
+static inline unsigned
+util_format_get_nblocksz(enum pipe_format format,
+ unsigned z)
+{
+ unsigned blockdepth = util_format_get_blockdepth(format);
+ return (z + blockdepth - 1) / blockdepth;
+}
+
+static inline unsigned
+util_format_get_nblocks(enum pipe_format format,
+ unsigned width,
+ unsigned height)
+{
+ assert(util_format_get_blockdepth(format) == 1);
+ return util_format_get_nblocksx(format, width) * util_format_get_nblocksy(format, height);
+}
+
+static inline size_t
+util_format_get_stride(enum pipe_format format,
+ unsigned width)
+{
+ return (size_t)util_format_get_nblocksx(format, width) * util_format_get_blocksize(format);
+}
+
+static inline size_t
+util_format_get_2d_size(enum pipe_format format,
+ size_t stride,
+ unsigned height)
+{
+ return util_format_get_nblocksy(format, height) * stride;
+}
+
+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 PIPE_SWIZZLE_X:
+ return desc->channel[0].size;
+ case PIPE_SWIZZLE_Y:
+ return desc->channel[1].size;
+ case PIPE_SWIZZLE_Z:
+ return desc->channel[2].size;
+ case PIPE_SWIZZLE_W:
+ return desc->channel[3].size;
+ default:
+ return 0;
+ }
+}
+
+/**
+ * Given a linear RGB colorspace format, return the corresponding SRGB
+ * format, or PIPE_FORMAT_NONE if none.
+ */
+static inline enum pipe_format
+util_format_srgb(enum pipe_format format)
+{
+ if (util_format_is_srgb(format))
+ return format;
+
+ switch (format) {
+ case PIPE_FORMAT_L8_UNORM:
+ return PIPE_FORMAT_L8_SRGB;
+ case PIPE_FORMAT_R8_UNORM:
+ return PIPE_FORMAT_R8_SRGB;
+ case PIPE_FORMAT_L8A8_UNORM:
+ return PIPE_FORMAT_L8A8_SRGB;
+ case PIPE_FORMAT_R8G8B8_UNORM:
+ return PIPE_FORMAT_R8G8B8_SRGB;
+ case PIPE_FORMAT_A8B8G8R8_UNORM:
+ return PIPE_FORMAT_A8B8G8R8_SRGB;
+ case PIPE_FORMAT_X8B8G8R8_UNORM:
+ return PIPE_FORMAT_X8B8G8R8_SRGB;
+ case PIPE_FORMAT_B8G8R8A8_UNORM:
+ return PIPE_FORMAT_B8G8R8A8_SRGB;
+ case PIPE_FORMAT_B8G8R8X8_UNORM:
+ return PIPE_FORMAT_B8G8R8X8_SRGB;
+ case PIPE_FORMAT_A8R8G8B8_UNORM:
+ return PIPE_FORMAT_A8R8G8B8_SRGB;
+ case PIPE_FORMAT_X8R8G8B8_UNORM:
+ return PIPE_FORMAT_X8R8G8B8_SRGB;
+ case PIPE_FORMAT_R8G8B8A8_UNORM:
+ return PIPE_FORMAT_R8G8B8A8_SRGB;
+ case PIPE_FORMAT_R8G8B8X8_UNORM:
+ return PIPE_FORMAT_R8G8B8X8_SRGB;
+ case PIPE_FORMAT_DXT1_RGB:
+ return PIPE_FORMAT_DXT1_SRGB;
+ case PIPE_FORMAT_DXT1_RGBA:
+ return PIPE_FORMAT_DXT1_SRGBA;
+ case PIPE_FORMAT_DXT3_RGBA:
+ return PIPE_FORMAT_DXT3_SRGBA;
+ case PIPE_FORMAT_DXT5_RGBA:
+ return PIPE_FORMAT_DXT5_SRGBA;
+ case PIPE_FORMAT_B5G6R5_UNORM:
+ return PIPE_FORMAT_B5G6R5_SRGB;
+ case PIPE_FORMAT_BPTC_RGBA_UNORM:
+ return PIPE_FORMAT_BPTC_SRGBA;
+ case PIPE_FORMAT_ETC2_RGB8:
+ return PIPE_FORMAT_ETC2_SRGB8;
+ case PIPE_FORMAT_ETC2_RGB8A1:
+ return PIPE_FORMAT_ETC2_SRGB8A1;
+ case PIPE_FORMAT_ETC2_RGBA8:
+ return PIPE_FORMAT_ETC2_SRGBA8;
+ case PIPE_FORMAT_ASTC_4x4:
+ return PIPE_FORMAT_ASTC_4x4_SRGB;
+ case PIPE_FORMAT_ASTC_5x4:
+ return PIPE_FORMAT_ASTC_5x4_SRGB;
+ case PIPE_FORMAT_ASTC_5x5:
+ return PIPE_FORMAT_ASTC_5x5_SRGB;
+ case PIPE_FORMAT_ASTC_6x5:
+ return PIPE_FORMAT_ASTC_6x5_SRGB;
+ case PIPE_FORMAT_ASTC_6x6:
+ return PIPE_FORMAT_ASTC_6x6_SRGB;
+ case PIPE_FORMAT_ASTC_8x5:
+ return PIPE_FORMAT_ASTC_8x5_SRGB;
+ case PIPE_FORMAT_ASTC_8x6:
+ return PIPE_FORMAT_ASTC_8x6_SRGB;
+ case PIPE_FORMAT_ASTC_8x8:
+ return PIPE_FORMAT_ASTC_8x8_SRGB;
+ case PIPE_FORMAT_ASTC_10x5:
+ return PIPE_FORMAT_ASTC_10x5_SRGB;
+ case PIPE_FORMAT_ASTC_10x6:
+ return PIPE_FORMAT_ASTC_10x6_SRGB;
+ case PIPE_FORMAT_ASTC_10x8:
+ return PIPE_FORMAT_ASTC_10x8_SRGB;
+ case PIPE_FORMAT_ASTC_10x10:
+ return PIPE_FORMAT_ASTC_10x10_SRGB;
+ case PIPE_FORMAT_ASTC_12x10:
+ return PIPE_FORMAT_ASTC_12x10_SRGB;
+ case PIPE_FORMAT_ASTC_12x12:
+ return PIPE_FORMAT_ASTC_12x12_SRGB;
+
+ default:
+ return PIPE_FORMAT_NONE;
+ }
+}
+
+/**
+ * Given an sRGB format, return the corresponding linear colorspace format.
+ * For non sRGB formats, return the format unchanged.
+ */
+static inline enum pipe_format
+util_format_linear(enum pipe_format format)
+{
+ switch (format) {
+ case PIPE_FORMAT_L8_SRGB:
+ return PIPE_FORMAT_L8_UNORM;
+ case PIPE_FORMAT_R8_SRGB:
+ return PIPE_FORMAT_R8_UNORM;
+ case PIPE_FORMAT_L8A8_SRGB:
+ return PIPE_FORMAT_L8A8_UNORM;
+ case PIPE_FORMAT_R8G8B8_SRGB:
+ return PIPE_FORMAT_R8G8B8_UNORM;
+ case PIPE_FORMAT_A8B8G8R8_SRGB:
+ return PIPE_FORMAT_A8B8G8R8_UNORM;
+ case PIPE_FORMAT_X8B8G8R8_SRGB:
+ return PIPE_FORMAT_X8B8G8R8_UNORM;
+ case PIPE_FORMAT_B8G8R8A8_SRGB:
+ return PIPE_FORMAT_B8G8R8A8_UNORM;
+ case PIPE_FORMAT_B8G8R8X8_SRGB:
+ return PIPE_FORMAT_B8G8R8X8_UNORM;
+ case PIPE_FORMAT_A8R8G8B8_SRGB:
+ return PIPE_FORMAT_A8R8G8B8_UNORM;
+ case PIPE_FORMAT_X8R8G8B8_SRGB:
+ return PIPE_FORMAT_X8R8G8B8_UNORM;
+ case PIPE_FORMAT_R8G8B8A8_SRGB:
+ return PIPE_FORMAT_R8G8B8A8_UNORM;
+ case PIPE_FORMAT_R8G8B8X8_SRGB:
+ return PIPE_FORMAT_R8G8B8X8_UNORM;
+ case PIPE_FORMAT_DXT1_SRGB:
+ return PIPE_FORMAT_DXT1_RGB;
+ case PIPE_FORMAT_DXT1_SRGBA:
+ return PIPE_FORMAT_DXT1_RGBA;
+ case PIPE_FORMAT_DXT3_SRGBA:
+ return PIPE_FORMAT_DXT3_RGBA;
+ case PIPE_FORMAT_DXT5_SRGBA:
+ return PIPE_FORMAT_DXT5_RGBA;
+ case PIPE_FORMAT_B5G6R5_SRGB:
+ return PIPE_FORMAT_B5G6R5_UNORM;
+ case PIPE_FORMAT_BPTC_SRGBA:
+ return PIPE_FORMAT_BPTC_RGBA_UNORM;
+ case PIPE_FORMAT_ETC2_SRGB8:
+ return PIPE_FORMAT_ETC2_RGB8;
+ case PIPE_FORMAT_ETC2_SRGB8A1:
+ return PIPE_FORMAT_ETC2_RGB8A1;
+ case PIPE_FORMAT_ETC2_SRGBA8:
+ return PIPE_FORMAT_ETC2_RGBA8;
+ case PIPE_FORMAT_ASTC_4x4_SRGB:
+ return PIPE_FORMAT_ASTC_4x4;
+ case PIPE_FORMAT_ASTC_5x4_SRGB:
+ return PIPE_FORMAT_ASTC_5x4;
+ case PIPE_FORMAT_ASTC_5x5_SRGB:
+ return PIPE_FORMAT_ASTC_5x5;
+ case PIPE_FORMAT_ASTC_6x5_SRGB:
+ return PIPE_FORMAT_ASTC_6x5;
+ case PIPE_FORMAT_ASTC_6x6_SRGB:
+ return PIPE_FORMAT_ASTC_6x6;
+ case PIPE_FORMAT_ASTC_8x5_SRGB:
+ return PIPE_FORMAT_ASTC_8x5;
+ case PIPE_FORMAT_ASTC_8x6_SRGB:
+ return PIPE_FORMAT_ASTC_8x6;
+ case PIPE_FORMAT_ASTC_8x8_SRGB:
+ return PIPE_FORMAT_ASTC_8x8;
+ case PIPE_FORMAT_ASTC_10x5_SRGB:
+ return PIPE_FORMAT_ASTC_10x5;
+ case PIPE_FORMAT_ASTC_10x6_SRGB:
+ return PIPE_FORMAT_ASTC_10x6;
+ case PIPE_FORMAT_ASTC_10x8_SRGB:
+ return PIPE_FORMAT_ASTC_10x8;
+ case PIPE_FORMAT_ASTC_10x10_SRGB:
+ return PIPE_FORMAT_ASTC_10x10;
+ case PIPE_FORMAT_ASTC_12x10_SRGB:
+ return PIPE_FORMAT_ASTC_12x10;
+ case PIPE_FORMAT_ASTC_12x12_SRGB:
+ return PIPE_FORMAT_ASTC_12x12;
+ default:
+ return format;
+ }
+}
+
+/**
+ * Given a depth-stencil format, return the corresponding stencil-only format.
+ * For stencil-only formats, return the format unchanged.
+ */
+static inline enum pipe_format
+util_format_stencil_only(enum pipe_format format)
+{
+ switch (format) {
+ /* mask out the depth component */
+ case PIPE_FORMAT_Z24_UNORM_S8_UINT:
+ return PIPE_FORMAT_X24S8_UINT;
+ case PIPE_FORMAT_S8_UINT_Z24_UNORM:
+ return PIPE_FORMAT_S8X24_UINT;
+ case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
+ return PIPE_FORMAT_X32_S8X24_UINT;
+
+ /* stencil only formats */
+ case PIPE_FORMAT_X24S8_UINT:
+ case PIPE_FORMAT_S8X24_UINT:
+ case PIPE_FORMAT_X32_S8X24_UINT:
+ case PIPE_FORMAT_S8_UINT:
+ return format;
+
+ default:
+ assert(0);
+ return PIPE_FORMAT_NONE;
+ }
+}
+
+/**
+ * Converts PIPE_FORMAT_*I* to PIPE_FORMAT_*R*.
+ * This is identity for non-intensity formats.
+ */
+static inline enum pipe_format
+util_format_intensity_to_red(enum pipe_format format)
+{
+ switch (format) {
+ case PIPE_FORMAT_I8_UNORM:
+ return PIPE_FORMAT_R8_UNORM;
+ case PIPE_FORMAT_I8_SNORM:
+ return PIPE_FORMAT_R8_SNORM;
+ case PIPE_FORMAT_I16_UNORM:
+ return PIPE_FORMAT_R16_UNORM;
+ case PIPE_FORMAT_I16_SNORM:
+ return PIPE_FORMAT_R16_SNORM;
+ case PIPE_FORMAT_I16_FLOAT:
+ return PIPE_FORMAT_R16_FLOAT;
+ case PIPE_FORMAT_I32_FLOAT:
+ return PIPE_FORMAT_R32_FLOAT;
+ case PIPE_FORMAT_I8_UINT:
+ return PIPE_FORMAT_R8_UINT;
+ case PIPE_FORMAT_I8_SINT:
+ return PIPE_FORMAT_R8_SINT;
+ case PIPE_FORMAT_I16_UINT:
+ return PIPE_FORMAT_R16_UINT;
+ case PIPE_FORMAT_I16_SINT:
+ return PIPE_FORMAT_R16_SINT;
+ case PIPE_FORMAT_I32_UINT:
+ return PIPE_FORMAT_R32_UINT;
+ case PIPE_FORMAT_I32_SINT:
+ return PIPE_FORMAT_R32_SINT;
+ default:
+ assert(!util_format_is_intensity(format));
+ return format;
+ }
+}
+
+/**
+ * Converts PIPE_FORMAT_*L* to PIPE_FORMAT_*R*.
+ * This is identity for non-luminance formats.
+ */
+static inline enum pipe_format
+util_format_luminance_to_red(enum pipe_format format)
+{
+ switch (format) {
+ case PIPE_FORMAT_L8_UNORM:
+ return PIPE_FORMAT_R8_UNORM;
+ case PIPE_FORMAT_L8_SNORM:
+ return PIPE_FORMAT_R8_SNORM;
+ case PIPE_FORMAT_L16_UNORM:
+ return PIPE_FORMAT_R16_UNORM;
+ case PIPE_FORMAT_L16_SNORM:
+ return PIPE_FORMAT_R16_SNORM;
+ case PIPE_FORMAT_L16_FLOAT:
+ return PIPE_FORMAT_R16_FLOAT;
+ case PIPE_FORMAT_L32_FLOAT:
+ return PIPE_FORMAT_R32_FLOAT;
+ case PIPE_FORMAT_L8_UINT:
+ return PIPE_FORMAT_R8_UINT;
+ case PIPE_FORMAT_L8_SINT:
+ return PIPE_FORMAT_R8_SINT;
+ case PIPE_FORMAT_L16_UINT:
+ return PIPE_FORMAT_R16_UINT;
+ case PIPE_FORMAT_L16_SINT:
+ return PIPE_FORMAT_R16_SINT;
+ case PIPE_FORMAT_L32_UINT:
+ return PIPE_FORMAT_R32_UINT;
+ case PIPE_FORMAT_L32_SINT:
+ return PIPE_FORMAT_R32_SINT;
+
+ case PIPE_FORMAT_LATC1_UNORM:
+ return PIPE_FORMAT_RGTC1_UNORM;
+ case PIPE_FORMAT_LATC1_SNORM:
+ return PIPE_FORMAT_RGTC1_SNORM;
+
+ case PIPE_FORMAT_L4A4_UNORM:
+ return PIPE_FORMAT_R4A4_UNORM;
+
+ case PIPE_FORMAT_L8A8_UNORM:
+ return PIPE_FORMAT_R8A8_UNORM;
+ case PIPE_FORMAT_L8A8_SNORM:
+ return PIPE_FORMAT_R8A8_SNORM;
+ case PIPE_FORMAT_L16A16_UNORM:
+ return PIPE_FORMAT_R16A16_UNORM;
+ case PIPE_FORMAT_L16A16_SNORM:
+ return PIPE_FORMAT_R16A16_SNORM;
+ case PIPE_FORMAT_L16A16_FLOAT:
+ return PIPE_FORMAT_R16A16_FLOAT;
+ case PIPE_FORMAT_L32A32_FLOAT:
+ return PIPE_FORMAT_R32A32_FLOAT;
+ case PIPE_FORMAT_L8A8_UINT:
+ return PIPE_FORMAT_R8A8_UINT;
+ case PIPE_FORMAT_L8A8_SINT:
+ return PIPE_FORMAT_R8A8_SINT;
+ case PIPE_FORMAT_L16A16_UINT:
+ return PIPE_FORMAT_R16A16_UINT;
+ case PIPE_FORMAT_L16A16_SINT:
+ return PIPE_FORMAT_R16A16_SINT;
+ case PIPE_FORMAT_L32A32_UINT:
+ return PIPE_FORMAT_R32A32_UINT;
+ case PIPE_FORMAT_L32A32_SINT:
+ return PIPE_FORMAT_R32A32_SINT;
+
+ /* We don't have compressed red-alpha variants for these. */
+ case PIPE_FORMAT_LATC2_UNORM:
+ case PIPE_FORMAT_LATC2_SNORM:
+ return PIPE_FORMAT_NONE;
+
+ default:
+ assert(!util_format_is_luminance(format) &&
+ !util_format_is_luminance_alpha(format));
+ return format;
+ }
+}
+
+static inline unsigned
+util_format_get_num_planes(enum pipe_format format)
+{
+ switch (util_format_description(format)->layout) {
+ case UTIL_FORMAT_LAYOUT_PLANAR3:
+ return 3;
+ case UTIL_FORMAT_LAYOUT_PLANAR2:
+ return 2;
+ default:
+ return 1;
+ }
+}
+
+static inline enum pipe_format
+util_format_get_plane_format(enum pipe_format format, unsigned plane)
+{
+ switch (format) {
+ case PIPE_FORMAT_YV12:
+ case PIPE_FORMAT_YV16:
+ case PIPE_FORMAT_IYUV:
+ return PIPE_FORMAT_R8_UNORM;
+ case PIPE_FORMAT_NV12:
+ return !plane ? PIPE_FORMAT_R8_UNORM : PIPE_FORMAT_RG88_UNORM;
+ case PIPE_FORMAT_NV21:
+ return !plane ? PIPE_FORMAT_R8_UNORM : PIPE_FORMAT_GR88_UNORM;
+ case PIPE_FORMAT_P016:
+ return !plane ? PIPE_FORMAT_R16_UNORM : PIPE_FORMAT_R16G16_UNORM;
+ default:
+ return format;
+ }
+}
+
+static inline unsigned
+util_format_get_plane_width(enum pipe_format format, unsigned plane,
+ unsigned width)
+{
+ switch (format) {
+ case PIPE_FORMAT_YV12:
+ case PIPE_FORMAT_YV16:
+ case PIPE_FORMAT_IYUV:
+ case PIPE_FORMAT_NV12:
+ case PIPE_FORMAT_NV21:
+ case PIPE_FORMAT_P016:
+ return !plane ? width : (width + 1) / 2;
+ default:
+ return width;
+ }
+}
+
+static inline unsigned
+util_format_get_plane_height(enum pipe_format format, unsigned plane,
+ unsigned height)
+{
+ switch (format) {
+ case PIPE_FORMAT_YV12:
+ case PIPE_FORMAT_IYUV:
+ case PIPE_FORMAT_NV12:
+ case PIPE_FORMAT_NV21:
+ case PIPE_FORMAT_P016:
+ return !plane ? height : (height + 1) / 2;
+ case PIPE_FORMAT_YV16:
+ default:
+ return height;
+ }
+}
+
+bool util_format_planar_is_supported(struct pipe_screen *screen,
+ enum pipe_format format,
+ enum pipe_texture_target target,
+ unsigned sample_count,
+ unsigned storage_sample_count,
+ unsigned bind);
+
+/**
+ * Return the number of components stored.
+ * Formats with block size != 1x1 will always have 1 component (the block).
+ */
+static inline unsigned
+util_format_get_nr_components(enum pipe_format format)
+{
+ const struct util_format_description *desc = util_format_description(format);
+ return desc->nr_channels;
+}
+
+/**
+ * Return the index of the first non-void channel
+ * -1 if no non-void channels
+ */
+static inline int
+util_format_get_first_non_void_channel(enum pipe_format format)
+{
+ const struct util_format_description *desc = util_format_description(format);
+ int i;
+
+ for (i = 0; i < 4; i++)
+ if (desc->channel[i].type != UTIL_FORMAT_TYPE_VOID)
+ break;
+
+ if (i == 4)
+ return -1;
+
+ return i;
+}
+
+/**
+ * Whether this format is any 8-bit UNORM variant. Looser than
+ * util_is_rgba8_variant (also includes alpha textures, for instance).
+ */
+
+static inline bool
+util_format_is_unorm8(const struct util_format_description *desc)
+{
+ int c = util_format_get_first_non_void_channel(desc->format);
+
+ if (c == -1)
+ return false;
+
+ return desc->is_unorm && desc->is_array && desc->channel[c].size == 8;
+}
+
+/*
+ * Format access functions.
+ */
+
+void
+util_format_read_4f(enum pipe_format format,
+ float *dst, unsigned dst_stride,
+ const void *src, unsigned src_stride,
+ unsigned x, unsigned y, unsigned w, unsigned h);
+
+void
+util_format_write_4f(enum pipe_format format,
+ const float *src, unsigned src_stride,
+ void *dst, unsigned dst_stride,
+ unsigned x, unsigned y, unsigned w, unsigned h);
+
+void
+util_format_read_4ub(enum pipe_format format,
+ uint8_t *dst, unsigned dst_stride,
+ const void *src, unsigned src_stride,
+ unsigned x, unsigned y, unsigned w, unsigned h);
+
+void
+util_format_write_4ub(enum pipe_format format,
+ const uint8_t *src, unsigned src_stride,
+ void *dst, unsigned dst_stride,
+ unsigned x, unsigned y, unsigned w, unsigned h);
+
+void
+util_format_read_4ui(enum pipe_format format,
+ unsigned *dst, unsigned dst_stride,
+ const void *src, unsigned src_stride,
+ unsigned x, unsigned y, unsigned w, unsigned h);
+
+void
+util_format_write_4ui(enum pipe_format format,
+ const unsigned int *src, unsigned src_stride,
+ void *dst, unsigned dst_stride,
+ unsigned x, unsigned y, unsigned w, unsigned h);
+
+void
+util_format_read_4i(enum pipe_format format,
+ int *dst, unsigned dst_stride,
+ const void *src, unsigned src_stride,
+ unsigned x, unsigned y, unsigned w, unsigned h);
+
+void
+util_format_write_4i(enum pipe_format format,
+ const int *src, unsigned src_stride,
+ void *dst, unsigned dst_stride,
+ unsigned x, unsigned y, unsigned w, unsigned h);
+
+/*
+ * Generic format conversion;
+ */
+
+boolean
+util_format_fits_8unorm(const struct util_format_description *format_desc);
+
+boolean
+util_format_translate(enum pipe_format dst_format,
+ void *dst, unsigned dst_stride,
+ unsigned dst_x, unsigned dst_y,
+ enum pipe_format src_format,
+ const void *src, unsigned src_stride,
+ unsigned src_x, unsigned src_y,
+ unsigned width, unsigned height);
+
+boolean
+util_format_translate_3d(enum pipe_format dst_format,
+ void *dst, unsigned dst_stride,
+ unsigned dst_slice_stride,
+ unsigned dst_x, unsigned dst_y,
+ unsigned dst_z,
+ enum pipe_format src_format,
+ const void *src, unsigned src_stride,
+ unsigned src_slice_stride,
+ unsigned src_x, unsigned src_y,
+ unsigned src_z, unsigned width,
+ unsigned height, unsigned depth);
+
+/*
+ * Swizzle operations.
+ */
+
+/* Compose two sets of swizzles.
+ * If V is a 4D vector and the function parameters represent functions that
+ * swizzle vector components, this holds:
+ * swz2(swz1(V)) = dst(V)
+ */
+void util_format_compose_swizzles(const unsigned char swz1[4],
+ const unsigned char swz2[4],
+ unsigned char dst[4]);
+
+/* Apply the swizzle provided in \param swz (which is one of PIPE_SWIZZLE_x)
+ * to \param src and store the result in \param dst.
+ * \param is_integer determines the value written for PIPE_SWIZZLE_1.
+ */
+void util_format_apply_color_swizzle(union pipe_color_union *dst,
+ const union pipe_color_union *src,
+ const unsigned char swz[4],
+ const boolean is_integer);
+
+void pipe_swizzle_4f(float *dst, const float *src,
+ const unsigned char swz[4]);
+
+void util_format_unswizzle_4f(float *dst, const float *src,
+ const unsigned char swz[4]);
+
+enum pipe_format
+util_format_snorm8_to_sint8(enum pipe_format format);
+
+
+extern void
+util_copy_rect(ubyte * dst, enum pipe_format format,
+ unsigned dst_stride, unsigned dst_x, unsigned dst_y,
+ unsigned width, unsigned height, const ubyte * src,
+ int src_stride, unsigned src_x, unsigned src_y);
+
+#ifdef __cplusplus
+} // extern "C" {
+#endif
+
+#endif /* ! U_FORMAT_H */
projects / mesa.git / blobdiff