From 62fc4b4ae16c924b63d9853a6f92c1da0c542b70 Mon Sep 17 00:00:00 2001 From: Anuj Phogat Date: Mon, 12 Nov 2012 15:58:25 -0800 Subject: [PATCH] mesa: Add decoding functions for GL_COMPRESSED_RGBA8_ETC2_EAC Data in GL_COMPRESSED_RGBA8_ETC2_EAC format is decoded and stored in MESA_FORMAT_RGBA8888_REV. Signed-off-by: Anuj Phogat Reviewed-by: Brian Paul --- src/mesa/main/texcompress.c | 2 +- src/mesa/main/texcompress_etc.c | 145 +++++++++++++++++++++++++++++++- src/mesa/main/texcompress_etc.h | 7 ++ src/mesa/main/texstore.c | 2 +- src/mesa/swrast/s_texfetch.c | 2 +- 5 files changed, 151 insertions(+), 7 deletions(-) diff --git a/src/mesa/main/texcompress.c b/src/mesa/main/texcompress.c index 3ed0e8593b5..7dc337c4291 100644 --- a/src/mesa/main/texcompress.c +++ b/src/mesa/main/texcompress.c @@ -614,7 +614,7 @@ _mesa_decompress_image(gl_format format, GLuint width, GLuint height, fetch = _mesa_fetch_texel_2d_f_etc2_srgb8; break; case MESA_FORMAT_ETC2_RGBA8_EAC: - /* fetch = _mesa_fetch_texel_2d_f_etc2_rgba8_eac; -- not implemented yet */ + fetch = _mesa_fetch_texel_2d_f_etc2_rgba8_eac; break; case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC: /* fetch = _mesa_fetch_texel_2d_f_etc2_srgb8_alpha8_eac; -- not implemented yet */ diff --git a/src/mesa/main/texcompress_etc.c b/src/mesa/main/texcompress_etc.c index 2aa8b6ad723..26375d8e9ff 100644 --- a/src/mesa/main/texcompress_etc.c +++ b/src/mesa/main/texcompress_etc.c @@ -27,6 +27,7 @@ * Supported ETC2 texture formats are: * GL_COMPRESSED_RGB8_ETC2 * GL_COMPRESSED_SRGB8_ETC2 + * GL_COMPRESSED_RGBA8_ETC2_EAC */ #include @@ -40,7 +41,7 @@ struct etc2_block { int distance; - uint32_t pixel_indices; + uint64_t pixel_indices[2]; const int *modifier_tables[2]; bool flipped; bool is_ind_mode; @@ -50,11 +51,33 @@ struct etc2_block { bool is_planar_mode; uint8_t base_colors[3][3]; uint8_t paint_colors[4][3]; + uint8_t base_codeword; + uint8_t multiplier; + uint8_t table_index; }; static const int etc2_distance_table[8] = { 3, 6, 11, 16, 23, 32, 41, 64 }; +static const int etc2_modifier_tables[16][8] = { + { -3, -6, -9, -15, 2, 5, 8, 14}, + { -3, -7, -10, -13, 2, 6, 9, 12}, + { -2, -5, -8, -13, 1, 4, 7, 12}, + { -2, -4, -6, -13, 1, 3, 5, 12}, + { -3, -6, -8, -12, 2, 5, 7, 11}, + { -3, -7, -9, -11, 2, 6, 8, 10}, + { -4, -7, -8, -11, 3, 6, 7, 10}, + { -3, -5, -8, -11, 2, 4, 7, 10}, + { -2, -6, -8, -10, 1, 5, 7, 9}, + { -2, -5, -8, -10, 1, 4, 7, 9}, + { -2, -4, -8, -10, 1, 3, 7, 9}, + { -2, -5, -7, -10, 1, 4, 6, 9}, + { -3, -4, -7, -10, 2, 3, 6, 9}, + { -1, -2, -3, -10, 0, 1, 2, 9}, + { -4, -6, -8, -9, 3, 5, 7, 8}, + { -3, -5, -7, -9, 2, 4, 6, 8}, +}; + /* define etc1_parse_block and etc. */ #define UINT8_TYPE GLubyte #define TAG(x) x @@ -402,7 +425,7 @@ etc2_rgb8_parse_block(struct etc2_block *block, const uint8_t *src) block->flipped = (src[3] & 0x1); } - block->pixel_indices = + block->pixel_indices[0] = (src[4] << 24) | (src[5] << 16) | (src[6] << 8) | src[7]; } @@ -415,8 +438,8 @@ etc2_rgb8_fetch_texel(const struct etc2_block *block, /* get pixel index */ bit = y + x * 4; - idx = ((block->pixel_indices >> (15 + bit)) & 0x2) | - ((block->pixel_indices >> (bit)) & 0x1); + idx = ((block->pixel_indices[0] >> (15 + bit)) & 0x2) | + ((block->pixel_indices[0] >> (bit)) & 0x1); if (block->is_ind_mode || block->is_diff_mode) { /* Use pixel index and subblock to get the modifier */ @@ -458,6 +481,51 @@ etc2_rgb8_fetch_texel(const struct etc2_block *block, } } +static void +etc2_alpha8_fetch_texel(const struct etc2_block *block, + int x, int y, uint8_t *dst) +{ + int modifier, alpha, bit, idx; + /* get pixel index */ + bit = ((3 - y) + (3 - x) * 4) * 3; + idx = (block->pixel_indices[1] >> bit) & 0x7; + modifier = etc2_modifier_tables[block->table_index][idx]; + alpha = block->base_codeword + modifier * block->multiplier; + dst[3] = etc2_clamp(alpha); +} + +static void +etc2_alpha8_parse_block(struct etc2_block *block, const uint8_t *src) +{ + block->base_codeword = src[0]; + block->multiplier = (src[1] >> 4) & 0xf; + block->table_index = src[1] & 0xf; + block->pixel_indices[1] = (((uint64_t)src[2] << 40) | + ((uint64_t)src[3] << 32) | + ((uint64_t)src[4] << 24) | + ((uint64_t)src[5] << 16) | + ((uint64_t)src[6] << 8) | + ((uint64_t)src[7])); +} + +static void +etc2_rgba8_parse_block(struct etc2_block *block, const uint8_t *src) +{ + /* RGB component is parsed the same way as for MESA_FORMAT_ETC2_RGB8 */ + etc2_rgb8_parse_block(block, src + 8); + + /* Parse Alpha component */ + etc2_alpha8_parse_block(block, src); +} + +static void +etc2_rgba8_fetch_texel(const struct etc2_block *block, + int x, int y, uint8_t *dst) +{ + etc2_rgb8_fetch_texel(block, x, y, dst); + etc2_alpha8_fetch_texel(block, x, y, dst); +} + static void etc2_unpack_rgb8(uint8_t *dst_row, unsigned dst_stride, @@ -531,6 +599,42 @@ etc2_unpack_srgb8(uint8_t *dst_row, } } +static void +etc2_unpack_rgba8(uint8_t *dst_row, + unsigned dst_stride, + const uint8_t *src_row, + unsigned src_stride, + unsigned width, + unsigned height) +{ + /* If internalformat is COMPRESSED_RGBA8_ETC2_EAC, each 4 × 4 block of + * RGBA8888 information is compressed to 128 bits. To decode a block, the + * two 64-bit integers int64bitAlpha and int64bitColor are calculated. + */ + const unsigned bw = 4, bh = 4, bs = 16, comps = 4; + 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) { + etc2_rgba8_parse_block(&block, src); + + for (j = 0; j < bh; j++) { + uint8_t *dst = dst_row + (y + j) * dst_stride + x * comps; + for (i = 0; i < bw; i++) { + etc2_rgba8_fetch_texel(&block, i, j, dst); + dst += comps; + } + } + src += bs; + } + + src_row += src_stride; + } +} + /* ETC2 texture formats are valid in glCompressedTexImage2D and * glCompressedTexSubImage2D functions */ GLboolean @@ -549,6 +653,14 @@ _mesa_texstore_etc2_srgb8(TEXSTORE_PARAMS) return GL_FALSE; } +GLboolean +_mesa_texstore_etc2_rgba8_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) @@ -589,10 +701,31 @@ _mesa_fetch_texel_2d_f_etc2_srgb8(const struct swrast_texture_image *texImage, texel[ACOMP] = 1.0f; } +void +_mesa_fetch_texel_2d_f_etc2_rgba8_eac(const struct swrast_texture_image *texImage, + GLint i, GLint j, GLint k, GLfloat *texel) +{ + struct etc2_block block; + uint8_t dst[4]; + const uint8_t *src; + + src = texImage->Map + + (((texImage->RowStride + 3) / 4) * (j / 4) + (i / 4)) * 16; + + etc2_rgba8_parse_block(&block, src); + etc2_rgba8_fetch_texel(&block, i % 4, j % 4, dst); + + texel[RCOMP] = UBYTE_TO_FLOAT(dst[0]); + texel[GCOMP] = UBYTE_TO_FLOAT(dst[1]); + texel[BCOMP] = UBYTE_TO_FLOAT(dst[2]); + texel[ACOMP] = UBYTE_TO_FLOAT(dst[3]); +} + /** * Decode texture data in any one of following formats: * `MESA_FORMAT_ETC2_RGB8` * `MESA_FORMAT_ETC2_SRGB8` + * `MESA_FORMAT_ETC2_RGBA8_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. @@ -619,4 +752,8 @@ _mesa_unpack_etc2_format(uint8_t *dst_row, etc2_unpack_srgb8(dst_row, dst_stride, src_row, src_stride, src_width, src_height); + else if (format == MESA_FORMAT_ETC2_RGBA8_EAC) + etc2_unpack_rgba8(dst_row, dst_stride, + src_row, src_stride, + src_width, src_height); } diff --git a/src/mesa/main/texcompress_etc.h b/src/mesa/main/texcompress_etc.h index 1dc1d5a0414..fd9d2d7224b 100644 --- a/src/mesa/main/texcompress_etc.h +++ b/src/mesa/main/texcompress_etc.h @@ -40,6 +40,9 @@ _mesa_texstore_etc2_rgb8(TEXSTORE_PARAMS); GLboolean _mesa_texstore_etc2_srgb8(TEXSTORE_PARAMS); +GLboolean +_mesa_texstore_etc2_rgba8_eac(TEXSTORE_PARAMS); + void _mesa_fetch_texel_2d_f_etc1_rgb8(const struct swrast_texture_image *texImage, GLint i, GLint j, GLint k, GLfloat *texel); @@ -50,6 +53,10 @@ void _mesa_fetch_texel_2d_f_etc2_srgb8(const struct swrast_texture_image *texImage, GLint i, GLint j, GLint k, GLfloat *texel); +void +_mesa_fetch_texel_2d_f_etc2_rgba8_eac(const struct swrast_texture_image *texImage, + GLint i, GLint j, GLint k, GLfloat *texel); + void _mesa_etc1_unpack_rgba8888(uint8_t *dst_row, unsigned dst_stride, diff --git a/src/mesa/main/texstore.c b/src/mesa/main/texstore.c index 3bafd235471..b5ef595cb58 100644 --- a/src/mesa/main/texstore.c +++ b/src/mesa/main/texstore.c @@ -4126,7 +4126,7 @@ _mesa_get_texstore_func(gl_format format) table[MESA_FORMAT_ETC1_RGB8] = _mesa_texstore_etc1_rgb8; table[MESA_FORMAT_ETC2_RGB8] = _mesa_texstore_etc2_rgb8; table[MESA_FORMAT_ETC2_SRGB8] = _mesa_texstore_etc2_srgb8; - /* table[MESA_FORMAT_ETC2_RGBA8_EAC] = _mesa_texstore_etc2_rgba8_eac; -- not implemented yet */ + table[MESA_FORMAT_ETC2_RGBA8_EAC] = _mesa_texstore_etc2_rgba8_eac; /* table[MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC] = _mesa_texstore_etc2_srgb8_alpha8_eac; -- not implemented yet */ /* table[MESA_FORMAT_ETC2_R11_EAC] = _mesa_texstore_etc2_r11_eac; -- not implemented yet */ /* table[MESA_FORMAT_ETC2_RG11_EAC] = _mesa_texstore_etc2_rg11_eac; -- not implemented yet */ diff --git a/src/mesa/swrast/s_texfetch.c b/src/mesa/swrast/s_texfetch.c index 66f282ce82c..504d39400e5 100644 --- a/src/mesa/swrast/s_texfetch.c +++ b/src/mesa/swrast/s_texfetch.c @@ -1043,7 +1043,7 @@ texfetch_funcs[] = { MESA_FORMAT_ETC2_RGBA8_EAC, NULL, - NULL /* _mesa_fetch_texel_2d_f_etc2_rgba8_eac -- not implemented yet */, + _mesa_fetch_texel_2d_f_etc2_rgba8_eac, NULL }, { -- 2.30.2