diff options
Diffstat (limited to 'src/mesa/main/texcompress_etc.c')
| -rw-r--r-- | src/mesa/main/texcompress_etc.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/src/mesa/main/texcompress_etc.c b/src/mesa/main/texcompress_etc.c index 2ac140ec34f..d5a623a464a 100644 --- a/src/mesa/main/texcompress_etc.c +++ b/src/mesa/main/texcompress_etc.c @@ -32,6 +32,7 @@ * GL_COMPRESSED_R11_EAC * GL_COMPRESSED_RG11_EAC * GL_COMPRESSED_SIGNED_R11_EAC + * GL_COMPRESSED_SIGNED_RG11_EAC */ #include <stdbool.h> @@ -894,6 +895,54 @@ etc2_unpack_signed_r11(uint8_t *dst_row, } } +static void +etc2_unpack_signed_rg11(uint8_t *dst_row, + unsigned dst_stride, + const uint8_t *src_row, + unsigned src_stride, + unsigned width, + unsigned height) +{ + /* If internalformat is COMPRESSED_SIGNED_RG11_EAC, each 4 × 4 block of + RG color information is compressed to 128 bits. + */ + const unsigned bw = 4, bh = 4, bs = 16, comps = 2, comp_size = 2; + struct etc2_block block; + unsigned x, y, i, j; + + for (y = 0; y < height; y += bh) { + const uint8_t *src = src_row; + + for (x = 0; x < width; x+= bw) { + /* red component */ + etc2_r11_parse_block(&block, src); + + for (j = 0; j < bh; j++) { + uint8_t *dst = dst_row + (y + j) * dst_stride + + x * comps * comp_size; + for (i = 0; i < bw; i++) { + etc2_signed_r11_fetch_texel(&block, i, j, dst); + dst += comps * comp_size; + } + } + /* green component */ + etc2_r11_parse_block(&block, src + 8); + + for (j = 0; j < bh; j++) { + uint8_t *dst = dst_row + (y + j) * dst_stride + + x * comps * comp_size; + for (i = 0; i < bw; i++) { + etc2_signed_r11_fetch_texel(&block, i, j, dst + comp_size); + dst += comps * comp_size; + } + } + src += bs; + } + + src_row += src_stride; + } +} + /* ETC2 texture formats are valid in glCompressedTexImage2D and * glCompressedTexSubImage2D functions */ GLboolean @@ -952,6 +1001,14 @@ _mesa_texstore_etc2_rg11_eac(TEXSTORE_PARAMS) return GL_FALSE; } +GLboolean +_mesa_texstore_etc2_signed_rg11_eac(TEXSTORE_PARAMS) +{ + ASSERT(0); + + return GL_FALSE; +} + void _mesa_fetch_texel_2d_f_etc2_rgb8(const struct swrast_texture_image *texImage, GLint i, GLint j, GLint k, GLfloat *texel) @@ -1101,6 +1158,31 @@ _mesa_fetch_texel_2d_f_etc2_signed_r11_eac(const struct swrast_texture_image *te texel[ACOMP] = 1.0f; } +void +_mesa_fetch_texel_2d_f_etc2_signed_rg11_eac(const struct swrast_texture_image *texImage, + GLint i, GLint j, GLint k, GLfloat *texel) +{ + struct etc2_block block; + GLushort dst[2]; + const uint8_t *src; + + src = texImage->Map + + (((texImage->RowStride + 3) / 4) * (j / 4) + (i / 4)) * 16; + + /* red component */ + etc2_r11_parse_block(&block, src); + etc2_signed_r11_fetch_texel(&block, i % 4, j % 4, (uint8_t *)dst); + + /* green component */ + etc2_r11_parse_block(&block, src + 8); + etc2_signed_r11_fetch_texel(&block, i % 4, j % 4, (uint8_t *)(dst + 1)); + + texel[RCOMP] = SHORT_TO_FLOAT(dst[0]); + texel[GCOMP] = SHORT_TO_FLOAT(dst[1]); + texel[BCOMP] = 0.0f; + texel[ACOMP] = 1.0f; +} + /** * Decode texture data in any one of following formats: * `MESA_FORMAT_ETC2_RGB8` @@ -1110,6 +1192,7 @@ _mesa_fetch_texel_2d_f_etc2_signed_r11_eac(const struct swrast_texture_image *te * `MESA_FORMAT_ETC2_R11_EAC` * `MESA_FORMAT_ETC2_RG11_EAC` * `MESA_FORMAT_ETC2_SIGNED_R11_EAC` + * `MESA_FORMAT_ETC2_SIGNED_RG11_EAC` * * The size of the source data must be a multiple of the ETC2 block size * even if the texture image's dimensions are not aligned to 4. @@ -1156,4 +1239,8 @@ _mesa_unpack_etc2_format(uint8_t *dst_row, etc2_unpack_signed_r11(dst_row, dst_stride, src_row, src_stride, src_width, src_height); + else if (format == MESA_FORMAT_ETC2_SIGNED_RG11_EAC) + etc2_unpack_signed_rg11(dst_row, dst_stride, + src_row, src_stride, + src_width, src_height); } |