*
* This is for formats like YV12 where there is less than one sample per
* pixel.
- *
- * XXX: This could actually b
*/
UTIL_FORMAT_LAYOUT_SUBSAMPLED = 3,
/**
- * An unspecified compression algorithm.
+ * S3 Texture Compression formats.
+ */
+ UTIL_FORMAT_LAYOUT_S3TC = 4,
+
+ /**
+ * Red-Green Texture Compression formats.
+ */
+ UTIL_FORMAT_LAYOUT_RGTC = 5,
+
+ /**
+ * Everything else that doesn't fit in any of the above layouts.
*/
- UTIL_FORMAT_LAYOUT_COMPRESSED = 4
+ UTIL_FORMAT_LAYOUT_OTHER = 6
};
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.
*/
*/
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).
*/
* 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 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_USCALED.
+ * Note: strides are in bytes.
+ *
+ * Only defined for stencil formats.
+ */
+ void
+ (*unpack_s_8uscaled)(uint8_t *dst, unsigned dst_stride,
+ const uint8_t *src, unsigned src_stride,
+ unsigned width, unsigned height);
+
+ /**
+ * Pack pixels from S8_USCALED.
+ * Note: strides are in bytes.
+ *
+ * Only defined for stencil formats.
+ */
+ void
+ (*pack_s_8uscaled)(uint8_t *dst, unsigned dst_stride,
+ const uint8_t *src, unsigned src_stride,
+ unsigned width, unsigned height);
+
};
{
const struct util_format_description *desc = util_format_description(format);
- assert(format);
- if (!format) {
- return "???";
+ 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(format);
- if (!format) {
+ assert(desc);
+ if (!desc) {
return FALSE;
}
- return desc->layout == UTIL_FORMAT_LAYOUT_COMPRESSED ? TRUE : FALSE;
+ switch (desc->layout) {
+ case UTIL_FORMAT_LAYOUT_S3TC:
+ case UTIL_FORMAT_LAYOUT_RGTC:
+ /* 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
{
const struct util_format_description *desc = util_format_description(format);
- assert(format);
- if (!format) {
+ assert(desc);
+ if (!desc) {
return FALSE;
}
{
const struct util_format_description *desc = util_format_description(format);
- assert(format);
- if (!format) {
+ assert(desc);
+ if (!desc) {
return FALSE;
}
}
+/**
+ * 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;
+ }
+}
+
+
+boolean
+util_format_is_float(enum pipe_format format);
+
+
+/**
+ * Whether the src format can be blitted to destation format with a simple
+ * memcpy.
+ */
+boolean
+util_is_format_compatible(const struct util_format_description *src_desc,
+ const struct util_format_description *dst_desc);
+
+/**
+ * Whether the format is supported by Gallium for the given bindings.
+ * This covers S3TC textures and floating-point render targets.
+ */
+boolean
+util_format_is_supported(enum pipe_format format, unsigned bind);
+
+/**
+ * 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].size != 8)
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+
/**
* Return total bits needed for the pixel format per block.
*/
{
const struct util_format_description *desc = util_format_description(format);
- assert(format);
- if (!format) {
+ assert(desc);
+ if (!desc) {
return 0;
}
{
const struct util_format_description *desc = util_format_description(format);
- assert(format);
- if (!format) {
+ assert(desc);
+ if (!desc) {
return 1;
}
{
const struct util_format_description *desc = util_format_description(format);
- assert(format);
- if (!format) {
+ assert(desc);
+ if (!desc) {
return 1;
}
}
}
+/**
+ * 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)
+{
+ switch (format) {
+ case PIPE_FORMAT_L8_UNORM:
+ return PIPE_FORMAT_L8_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_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;
+ 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_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_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;
+ default:
+ return format;
+ }
+}
+
+/**
+ * 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;
+}
/*
* Format access functions.
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);
+
+void
+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);
+
#ifdef __cplusplus
} // extern "C" {
#endif
projects / mesa.git / blobdiff