#include "format_utils.h"
#include "glformats.h"
+#include "format_pack.h"
+#include "format_unpack.h"
+
+const mesa_array_format RGBA8888_FLOAT =
+ MESA_ARRAY_FORMAT(4, 1, 1, 1, 4, 0, 1, 2, 3);
+
+const mesa_array_format RGBA8888_UBYTE =
+ MESA_ARRAY_FORMAT(1, 0, 0, 1, 4, 0, 1, 2, 3);
+
+const mesa_array_format RGBA8888_UINT =
+ MESA_ARRAY_FORMAT(4, 0, 0, 0, 4, 0, 1, 2, 3);
+
+const mesa_array_format RGBA8888_INT =
+ MESA_ARRAY_FORMAT(4, 1, 0, 0, 4, 0, 1, 2, 3);
+
+static void
+invert_swizzle(uint8_t dst[4], const uint8_t src[4])
+{
+ int i, j;
+
+ dst[0] = MESA_FORMAT_SWIZZLE_NONE;
+ dst[1] = MESA_FORMAT_SWIZZLE_NONE;
+ dst[2] = MESA_FORMAT_SWIZZLE_NONE;
+ dst[3] = MESA_FORMAT_SWIZZLE_NONE;
+
+ for (i = 0; i < 4; ++i)
+ for (j = 0; j < 4; ++j)
+ if (src[j] == i && dst[i] == MESA_FORMAT_SWIZZLE_NONE)
+ dst[i] = j;
+}
+
+static GLenum
+gl_type_for_array_format_datatype(enum mesa_array_format_datatype type)
+{
+ switch (type) {
+ case MESA_ARRAY_FORMAT_TYPE_UBYTE:
+ return GL_UNSIGNED_BYTE;
+ case MESA_ARRAY_FORMAT_TYPE_USHORT:
+ return GL_UNSIGNED_SHORT;
+ case MESA_ARRAY_FORMAT_TYPE_UINT:
+ return GL_UNSIGNED_INT;
+ case MESA_ARRAY_FORMAT_TYPE_BYTE:
+ return GL_BYTE;
+ case MESA_ARRAY_FORMAT_TYPE_SHORT:
+ return GL_SHORT;
+ case MESA_ARRAY_FORMAT_TYPE_INT:
+ return GL_INT;
+ case MESA_ARRAY_FORMAT_TYPE_HALF:
+ return GL_HALF_FLOAT;
+ case MESA_ARRAY_FORMAT_TYPE_FLOAT:
+ return GL_FLOAT;
+ default:
+ assert(!"Invalid datatype");
+ return GL_NONE;
+ }
+}
+
+/**
+ * This can be used to convert between most color formats.
+ *
+ * Limitations:
+ * - This function doesn't handle GL_COLOR_INDEX or YCBCR formats.
+ * - This function doesn't handle byte-swapping or transferOps, these should
+ * be handled by the caller.
+ *
+ * \param void_dst The address where converted color data will be stored.
+ * The caller must ensure that the buffer is large enough
+ * to hold the converted pixel data.
+ * \param dst_format The destination color format. It can be a mesa_format
+ * or a mesa_array_format represented as an uint32_t.
+ * \param dst_stride The stride of the destination format in bytes.
+ * \param void_src The address of the source color data to convert.
+ * \param src_format The source color format. It can be a mesa_format
+ * or a mesa_array_format represented as an uint32_t.
+ * \param src_stride The stride of the source format in bytes.
+ * \param width The width, in pixels, of the source image to convert.
+ * \param height The height, in pixels, of the source image to convert.
+ */
+void
+_mesa_format_convert(void *void_dst, uint32_t dst_format, size_t dst_stride,
+ void *void_src, uint32_t src_format, size_t src_stride,
+ size_t width, size_t height)
+{
+ uint8_t *dst = (uint8_t *)void_dst;
+ uint8_t *src = (uint8_t *)void_src;
+ mesa_array_format src_array_format, dst_array_format;
+ bool src_format_is_mesa_array_format, dst_format_is_mesa_array_format;
+ uint8_t src2dst[4], src2rgba[4], rgba2dst[4], dst2rgba[4];
+ GLenum src_gl_type, dst_gl_type, common_gl_type;
+ bool normalized, dst_integer, src_integer, is_signed;
+ int src_num_channels = 0, dst_num_channels = 0;
+ uint8_t (*tmp_ubyte)[4];
+ float (*tmp_float)[4];
+ uint32_t (*tmp_uint)[4];
+ int i, bits;
+ size_t row;
+
+ if (_mesa_format_is_mesa_array_format(src_format)) {
+ src_format_is_mesa_array_format = true;
+ src_array_format = src_format;
+ } else {
+ assert(_mesa_is_format_color_format(src_format));
+ src_format_is_mesa_array_format = false;
+ src_array_format = _mesa_format_to_array_format(src_format);
+ }
+
+ if (_mesa_format_is_mesa_array_format(dst_format)) {
+ dst_format_is_mesa_array_format = true;
+ dst_array_format = dst_format;
+ } else {
+ assert(_mesa_is_format_color_format(dst_format));
+ dst_format_is_mesa_array_format = false;
+ dst_array_format = _mesa_format_to_array_format(dst_format);
+ }
+
+ /* Handle the cases where we can directly unpack */
+ if (!src_format_is_mesa_array_format) {
+ if (dst_array_format == RGBA8888_FLOAT) {
+ for (row = 0; row < height; ++row) {
+ _mesa_unpack_rgba_row(src_format, width,
+ src, (float (*)[4])dst);
+ src += src_stride;
+ dst += dst_stride;
+ }
+ return;
+ } else if (dst_array_format == RGBA8888_UBYTE) {
+ assert(!_mesa_is_format_integer_color(src_format));
+ for (row = 0; row < height; ++row) {
+ _mesa_unpack_ubyte_rgba_row(src_format, width,
+ src, (uint8_t (*)[4])dst);
+ src += src_stride;
+ dst += dst_stride;
+ }
+ return;
+ } else if (dst_array_format == RGBA8888_UINT &&
+ _mesa_is_format_unsigned(src_format)) {
+ assert(_mesa_is_format_integer_color(src_format));
+ for (row = 0; row < height; ++row) {
+ _mesa_unpack_uint_rgba_row(src_format, width,
+ src, (uint32_t (*)[4])dst);
+ src += src_stride;
+ dst += dst_stride;
+ }
+ return;
+ }
+ }
+
+ /* Handle the cases where we can directly pack */
+ if (!dst_format_is_mesa_array_format) {
+ if (src_array_format == RGBA8888_FLOAT) {
+ for (row = 0; row < height; ++row) {
+ _mesa_pack_float_rgba_row(dst_format, width,
+ (const float (*)[4])src, dst);
+ src += src_stride;
+ dst += dst_stride;
+ }
+ return;
+ } else if (src_array_format == RGBA8888_UBYTE) {
+ assert(!_mesa_is_format_integer_color(dst_format));
+ for (row = 0; row < height; ++row) {
+ _mesa_pack_ubyte_rgba_row(dst_format, width,
+ (const uint8_t (*)[4])src, dst);
+ src += src_stride;
+ dst += dst_stride;
+ }
+ return;
+ } else if (src_array_format == RGBA8888_UINT &&
+ _mesa_is_format_unsigned(dst_format)) {
+ assert(_mesa_is_format_integer_color(dst_format));
+ for (row = 0; row < height; ++row) {
+ _mesa_pack_uint_rgba_row(dst_format, width,
+ (const uint32_t (*)[4])src, dst);
+ src += src_stride;
+ dst += dst_stride;
+ }
+ return;
+ }
+ }
+
+ /* Handle conversions between array formats */
+ normalized = false;
+ if (src_array_format) {
+ enum mesa_array_format_datatype datatype =
+ _mesa_array_format_get_datatype(src_array_format);
+ src_gl_type = gl_type_for_array_format_datatype(datatype);
+
+ src_num_channels = _mesa_array_format_get_num_channels(src_array_format);
+
+ _mesa_array_format_get_swizzle(src_array_format, src2rgba);
+
+ normalized = _mesa_array_format_is_normalized(src_array_format);
+ }
+
+ if (dst_array_format) {
+ enum mesa_array_format_datatype datatype =
+ _mesa_array_format_get_datatype(dst_array_format);
+ dst_gl_type = gl_type_for_array_format_datatype(datatype);
+
+ dst_num_channels = _mesa_array_format_get_num_channels(dst_array_format);
+
+ _mesa_array_format_get_swizzle(dst_array_format, dst2rgba);
+ invert_swizzle(rgba2dst, dst2rgba);
+
+ normalized |= _mesa_array_format_is_normalized(dst_array_format);
+ }
+
+ if (src_array_format && dst_array_format) {
+ assert(_mesa_array_format_is_normalized(src_array_format) ==
+ _mesa_array_format_is_normalized(dst_array_format));
+
+ for (i = 0; i < 4; i++) {
+ if (rgba2dst[i] > MESA_FORMAT_SWIZZLE_W) {
+ src2dst[i] = rgba2dst[i];
+ } else {
+ src2dst[i] = src2rgba[rgba2dst[i]];
+ }
+ }
+
+ for (row = 0; row < height; ++row) {
+ _mesa_swizzle_and_convert(dst, dst_gl_type, dst_num_channels,
+ src, src_gl_type, src_num_channels,
+ src2dst, normalized, width);
+ src += src_stride;
+ dst += dst_stride;
+ }
+ return;
+ }
+
+ /* At this point, we're fresh out of fast-paths and we need to convert
+ * to float, uint32, or, if we're lucky, uint8.
+ */
+ dst_integer = false;
+ src_integer = false;
+
+ if (src_array_format) {
+ if (!_mesa_array_format_is_float(src_array_format) &&
+ !_mesa_array_format_is_normalized(src_array_format))
+ src_integer = true;
+ } else {
+ switch (_mesa_get_format_datatype(src_format)) {
+ case GL_UNSIGNED_INT:
+ case GL_INT:
+ src_integer = true;
+ break;
+ }
+ }
+
+ /* If the destination format is signed but the source is unsigned, then we
+ * don't loose any data by converting to a signed intermediate format above
+ * and beyond the precision that we loose in the conversion itself. If the
+ * destination is unsigned then, by using an unsigned intermediate format,
+ * we make the conversion function that converts from the source to the
+ * intermediate format take care of truncating at zero. The exception here
+ * is if the intermediate format is float, in which case the first
+ * conversion will leave it signed and the second conversion will truncate
+ * at zero.
+ */
+ is_signed = false;
+ if (dst_array_format) {
+ if (!_mesa_array_format_is_float(dst_array_format) &&
+ !_mesa_array_format_is_normalized(dst_array_format))
+ dst_integer = true;
+ is_signed = _mesa_array_format_is_signed(dst_array_format);
+ bits = 8 * _mesa_array_format_get_type_size(dst_array_format);
+ } else {
+ switch (_mesa_get_format_datatype(dst_format)) {
+ case GL_UNSIGNED_NORMALIZED:
+ is_signed = false;
+ break;
+ case GL_SIGNED_NORMALIZED:
+ is_signed = true;
+ break;
+ case GL_FLOAT:
+ is_signed = true;
+ break;
+ case GL_UNSIGNED_INT:
+ is_signed = false;
+ dst_integer = true;
+ break;
+ case GL_INT:
+ is_signed = true;
+ dst_integer = true;
+ break;
+ }
+ bits = _mesa_get_format_max_bits(dst_format);
+ }
+
+ assert(src_integer == dst_integer);
+
+ if (src_integer && dst_integer) {
+ tmp_uint = malloc(width * height * sizeof(*tmp_uint));
+
+ /* The [un]packing functions for unsigned datatypes treat the 32-bit
+ * integer array as signed for signed formats and as unsigned for
+ * unsigned formats. This is a bit of a problem if we ever convert from
+ * a signed to an unsigned format because the unsigned packing function
+ * doesn't know that the input is signed and will treat it as unsigned
+ * and not do the trunctation. The thing that saves us here is that all
+ * of the packed formats are unsigned, so we can just always use
+ * _mesa_swizzle_and_convert for signed formats, which is aware of the
+ * truncation problem.
+ */
+ common_gl_type = is_signed ? GL_INT : GL_UNSIGNED_INT;
+ if (src_array_format) {
+ for (row = 0; row < height; ++row) {
+ _mesa_swizzle_and_convert(tmp_uint + row * width, common_gl_type, 4,
+ src, src_gl_type, src_num_channels,
+ src2rgba, normalized, width);
+ src += src_stride;
+ }
+ } else {
+ for (row = 0; row < height; ++row) {
+ _mesa_unpack_uint_rgba_row(src_format, width,
+ src, tmp_uint + row * width);
+ src += src_stride;
+ }
+ }
+
+ /* At this point, we have already done the truncation if the source is
+ * signed but the destination is unsigned, so no need to force the
+ * _mesa_swizzle_and_convert path.
+ */
+ if (dst_format_is_mesa_array_format) {
+ for (row = 0; row < height; ++row) {
+ _mesa_swizzle_and_convert(dst, dst_gl_type, dst_num_channels,
+ tmp_uint + row * width, common_gl_type, 4,
+ rgba2dst, normalized, width);
+ dst += dst_stride;
+ }
+ } else {
+ for (row = 0; row < height; ++row) {
+ _mesa_pack_uint_rgba_row(dst_format, width,
+ (const uint32_t (*)[4])tmp_uint + row * width, dst);
+ dst += dst_stride;
+ }
+ }
+
+ free(tmp_uint);
+ } else if (is_signed || bits > 8) {
+ tmp_float = malloc(width * height * sizeof(*tmp_float));
+
+ if (src_format_is_mesa_array_format) {
+ for (row = 0; row < height; ++row) {
+ _mesa_swizzle_and_convert(tmp_float + row * width, GL_FLOAT, 4,
+ src, src_gl_type, src_num_channels,
+ src2rgba, normalized, width);
+ src += src_stride;
+ }
+ } else {
+ for (row = 0; row < height; ++row) {
+ _mesa_unpack_rgba_row(src_format, width,
+ src, tmp_float + row * width);
+ src += src_stride;
+ }
+ }
+
+ if (dst_format_is_mesa_array_format) {
+ for (row = 0; row < height; ++row) {
+ _mesa_swizzle_and_convert(dst, dst_gl_type, dst_num_channels,
+ tmp_float + row * width, GL_FLOAT, 4,
+ rgba2dst, normalized, width);
+ dst += dst_stride;
+ }
+ } else {
+ for (row = 0; row < height; ++row) {
+ _mesa_pack_float_rgba_row(dst_format, width,
+ (const float (*)[4])tmp_float + row * width, dst);
+ dst += dst_stride;
+ }
+ }
+
+ free(tmp_float);
+ } else {
+ tmp_ubyte = malloc(width * height * sizeof(*tmp_ubyte));
+
+ if (src_format_is_mesa_array_format) {
+ for (row = 0; row < height; ++row) {
+ _mesa_swizzle_and_convert(tmp_ubyte + row * width, GL_UNSIGNED_BYTE, 4,
+ src, src_gl_type, src_num_channels,
+ src2rgba, normalized, width);
+ src += src_stride;
+ }
+ } else {
+ for (row = 0; row < height; ++row) {
+ _mesa_unpack_ubyte_rgba_row(src_format, width,
+ src, tmp_ubyte + row * width);
+ src += src_stride;
+ }
+ }
+
+ if (dst_format_is_mesa_array_format) {
+ for (row = 0; row < height; ++row) {
+ _mesa_swizzle_and_convert(dst, dst_gl_type, dst_num_channels,
+ tmp_ubyte + row * width, GL_UNSIGNED_BYTE, 4,
+ rgba2dst, normalized, width);
+ dst += dst_stride;
+ }
+ } else {
+ for (row = 0; row < height; ++row) {
+ _mesa_pack_ubyte_rgba_row(dst_format, width,
+ (const uint8_t (*)[4])tmp_ubyte + row * width, dst);
+ dst += dst_stride;
+ }
+ }
+
+ free(tmp_ubyte);
+ }
+}
static const uint8_t map_identity[7] = { 0, 1, 2, 3, 4, 5, 6 };
static const uint8_t map_3210[7] = { 3, 2, 1, 0, 4, 5, 6 };
projects / mesa.git / commitdiff