diff options
Diffstat (limited to 'src/mesa/main/format_utils.c')
| -rw-r--r-- | src/mesa/main/format_utils.c | 408 |
1 files changed, 408 insertions, 0 deletions
diff --git a/src/mesa/main/format_utils.c b/src/mesa/main/format_utils.c index a6b88834453..6467307c653 100644 --- a/src/mesa/main/format_utils.c +++ b/src/mesa/main/format_utils.c @@ -24,6 +24,414 @@ #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 }; |