diff options
Diffstat (limited to 'mesalib/src/mesa/main/texcompress_etc.c')
| -rw-r--r-- | mesalib/src/mesa/main/texcompress_etc.c | 1376 |
1 files changed, 1368 insertions, 8 deletions
diff --git a/mesalib/src/mesa/main/texcompress_etc.c b/mesalib/src/mesa/main/texcompress_etc.c index c645f52b9..73d2fa4fe 100644 --- a/mesalib/src/mesa/main/texcompress_etc.c +++ b/mesalib/src/mesa/main/texcompress_etc.c @@ -24,24 +24,78 @@ /** * \file texcompress_etc.c * GL_OES_compressed_ETC1_RGB8_texture support. + * Supported ETC2 texture formats are: + * GL_COMPRESSED_RGB8_ETC2 + * GL_COMPRESSED_SRGB8_ETC2 + * GL_COMPRESSED_RGBA8_ETC2_EAC + * GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC + * GL_COMPRESSED_R11_EAC + * GL_COMPRESSED_RG11_EAC + * GL_COMPRESSED_SIGNED_R11_EAC + * GL_COMPRESSED_SIGNED_RG11_EAC + * MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1 + * MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1 */ - +#include <stdbool.h> #include "mfeatures.h" #include "texcompress.h" #include "texcompress_etc.h" #include "texstore.h" #include "macros.h" #include "swrast/s_context.h" +#include "format_unpack.h" -GLboolean -_mesa_texstore_etc1_rgb8(TEXSTORE_PARAMS) -{ - /* GL_ETC1_RGB8_OES is only valid in glCompressedTexImage2D */ - ASSERT(0); +struct etc2_block { + int distance; + uint64_t pixel_indices[2]; + const int *modifier_tables[2]; + bool flipped; + bool opaque; + bool is_ind_mode; + bool is_diff_mode; + bool is_t_mode; + bool is_h_mode; + 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; +}; - return GL_FALSE; -} +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}, +}; + +static const int etc2_modifier_tables_non_opaque[8][4] = { + { 0, 8, 0, -8}, + { 0, 17, 0, -17}, + { 0, 29, 0, -29}, + { 0, 42, 0, -42}, + { 0, 60, 0, -60}, + { 0, 80, 0, -80}, + { 0, 106, 0, -106}, + { 0, 183, 0, -183} +}; /* define etc1_parse_block and etc. */ #define UINT8_TYPE GLubyte @@ -50,6 +104,15 @@ _mesa_texstore_etc1_rgb8(TEXSTORE_PARAMS) #undef TAG #undef UINT8_TYPE +GLboolean +_mesa_texstore_etc1_rgb8(TEXSTORE_PARAMS) +{ + /* GL_ETC1_RGB8_OES is only valid in glCompressedTexImage2D */ + ASSERT(0); + + return GL_FALSE; +} + void _mesa_fetch_texel_2d_f_etc1_rgb8(const struct swrast_texture_image *texImage, GLint i, GLint j, GLint k, GLfloat *texel) @@ -101,3 +164,1300 @@ _mesa_etc1_unpack_rgba8888(uint8_t *dst_row, src_row, src_stride, src_width, src_height); } + +static uint8_t +etc2_base_color1_t_mode(const uint8_t *in, GLuint index) +{ + uint8_t R1a = 0, x = 0; + /* base col 1 = extend_4to8bits( (R1a << 2) | R1b, G1, B1) */ + switch(index) { + case 0: + R1a = (in[0] >> 3) & 0x3; + x = ((R1a << 2) | (in[0] & 0x3)); + break; + case 1: + x = ((in[1] >> 4) & 0xf); + break; + case 2: + x = (in[1] & 0xf); + break; + default: + /* invalid index */ + break; + } + return ((x << 4) | (x & 0xf)); +} + +static uint8_t +etc2_base_color2_t_mode(const uint8_t *in, GLuint index) +{ + uint8_t x = 0; + /*extend 4to8bits(R2, G2, B2)*/ + switch(index) { + case 0: + x = ((in[2] >> 4) & 0xf ); + break; + case 1: + x = (in[2] & 0xf); + break; + case 2: + x = ((in[3] >> 4) & 0xf); + break; + default: + /* invalid index */ + break; + } + return ((x << 4) | (x & 0xf)); +} + +static uint8_t +etc2_base_color1_h_mode(const uint8_t *in, GLuint index) +{ + uint8_t x = 0; + /* base col 1 = extend 4to8bits(R1, (G1a << 1) | G1b, (B1a << 3) | B1b) */ + switch(index) { + case 0: + x = ((in[0] >> 3) & 0xf); + break; + case 1: + x = (((in[0] & 0x7) << 1) | ((in[1] >> 4) & 0x1)); + break; + case 2: + x = ((in[1] & 0x8) | + (((in[1] & 0x3) << 1) | ((in[2] >> 7) & 0x1))); + break; + default: + /* invalid index */ + break; + } + return ((x << 4) | (x & 0xf)); + } + +static uint8_t +etc2_base_color2_h_mode(const uint8_t *in, GLuint index) +{ + uint8_t x = 0; + /* base col 2 = extend 4to8bits(R2, G2, B2) */ + switch(index) { + case 0: + x = ((in[2] >> 3) & 0xf ); + break; + case 1: + x = (((in[2] & 0x7) << 1) | ((in[3] >> 7) & 0x1)); + break; + case 2: + x = ((in[3] >> 3) & 0xf); + break; + default: + /* invalid index */ + break; + } + return ((x << 4) | (x & 0xf)); + } + +static uint8_t +etc2_base_color_o_planar(const uint8_t *in, GLuint index) +{ + GLuint tmp; + switch(index) { + case 0: + tmp = ((in[0] >> 1) & 0x3f); /* RO */ + return ((tmp << 2) | (tmp >> 4)); + case 1: + tmp = (((in[0] & 0x1) << 6) | /* GO1 */ + ((in[1] >> 1) & 0x3f)); /* GO2 */ + return ((tmp << 1) | (tmp >> 6)); + case 2: + tmp = (((in[1] & 0x1) << 5) | /* BO1 */ + (in[2] & 0x18) | /* BO2 */ + (((in[2] & 0x3) << 1) | ((in[3] >> 7) & 0x1))); /* BO3 */ + return ((tmp << 2) | (tmp >> 4)); + default: + /* invalid index */ + return 0; + } +} + +static uint8_t +etc2_base_color_h_planar(const uint8_t *in, GLuint index) +{ + GLuint tmp; + switch(index) { + case 0: + tmp = (((in[3] & 0x7c) >> 1) | /* RH1 */ + (in[3] & 0x1)); /* RH2 */ + return ((tmp << 2) | (tmp >> 4)); + case 1: + tmp = (in[4] >> 1) & 0x7f; /* GH */ + return ((tmp << 1) | (tmp >> 6)); + case 2: + tmp = (((in[4] & 0x1) << 5) | + ((in[5] >> 3) & 0x1f)); /* BH */ + return ((tmp << 2) | (tmp >> 4)); + default: + /* invalid index */ + return 0; + } +} + +static uint8_t +etc2_base_color_v_planar(const uint8_t *in, GLuint index) +{ + GLuint tmp; + switch(index) { + case 0: + tmp = (((in[5] & 0x7) << 0x3) | + ((in[6] >> 5) & 0x7)); /* RV */ + return ((tmp << 2) | (tmp >> 4)); + case 1: + tmp = (((in[6] & 0x1f) << 2) | + ((in[7] >> 6) & 0x3)); /* GV */ + return ((tmp << 1) | (tmp >> 6)); + case 2: + tmp = in[7] & 0x3f; /* BV */ + return ((tmp << 2) | (tmp >> 4)); + default: + /* invalid index */ + return 0; + } +} + +static GLint +etc2_get_pixel_index(const struct etc2_block *block, int x, int y) +{ + int bit = ((3 - y) + (3 - x) * 4) * 3; + int idx = (block->pixel_indices[1] >> bit) & 0x7; + return idx; +} + +static uint8_t +etc2_clamp(int color) +{ + /* CLAMP(color, 0, 255) */ + return (uint8_t) CLAMP(color, 0, 255); +} + +static GLushort +etc2_clamp2(int color) +{ + /* CLAMP(color, 0, 2047) */ + return (GLushort) CLAMP(color, 0, 2047); +} + +static GLshort +etc2_clamp3(int color) +{ + /* CLAMP(color, -1023, 1023) */ + return (GLshort) CLAMP(color, -1023, 1023); +} + +static void +etc2_rgb8_parse_block(struct etc2_block *block, + const uint8_t *src, + GLboolean punchthrough_alpha) +{ + unsigned i; + GLboolean diffbit = false; + static const int lookup[8] = { 0, 1, 2, 3, -4, -3, -2, -1 }; + + const int R_plus_dR = (src[0] >> 3) + lookup[src[0] & 0x7]; + const int G_plus_dG = (src[1] >> 3) + lookup[src[1] & 0x7]; + const int B_plus_dB = (src[2] >> 3) + lookup[src[2] & 0x7]; + + /* Reset the mode flags */ + block->is_ind_mode = false; + block->is_diff_mode = false; + block->is_t_mode = false; + block->is_h_mode = false; + block->is_planar_mode = false; + + if (punchthrough_alpha) + block->opaque = src[3] & 0x2; + else + diffbit = src[3] & 0x2; + + if (!diffbit && !punchthrough_alpha) { + /* individual mode */ + block->is_ind_mode = true; + + for (i = 0; i < 3; i++) { + /* Texture decode algorithm is same for individual mode in etc1 + * & etc2. + */ + block->base_colors[0][i] = etc1_base_color_ind_hi(src[i]); + block->base_colors[1][i] = etc1_base_color_ind_lo(src[i]); + } + } + else if (R_plus_dR < 0 || R_plus_dR > 31){ + /* T mode */ + block->is_t_mode = true; + + for(i = 0; i < 3; i++) { + block->base_colors[0][i] = etc2_base_color1_t_mode(src, i); + block->base_colors[1][i] = etc2_base_color2_t_mode(src, i); + } + /* pick distance */ + block->distance = + etc2_distance_table[(((src[3] >> 2) & 0x3) << 1) | + (src[3] & 0x1)]; + + for (i = 0; i < 3; i++) { + block->paint_colors[0][i] = etc2_clamp(block->base_colors[0][i]); + block->paint_colors[1][i] = etc2_clamp(block->base_colors[1][i] + + block->distance); + block->paint_colors[2][i] = etc2_clamp(block->base_colors[1][i]); + block->paint_colors[3][i] = etc2_clamp(block->base_colors[1][i] - + block->distance); + } + } + else if (G_plus_dG < 0 || G_plus_dG > 31){ + int base_color_1_value, base_color_2_value; + + /* H mode */ + block->is_h_mode = true; + + for(i = 0; i < 3; i++) { + block->base_colors[0][i] = etc2_base_color1_h_mode(src, i); + block->base_colors[1][i] = etc2_base_color2_h_mode(src, i); + } + + base_color_1_value = (block->base_colors[0][0] << 16) + + (block->base_colors[0][1] << 8) + + block->base_colors[0][2]; + base_color_2_value = (block->base_colors[1][0] << 16) + + (block->base_colors[1][1] << 8) + + block->base_colors[1][2]; + /* pick distance */ + block->distance = + etc2_distance_table[(src[3] & 0x4) | + ((src[3] & 0x1) << 1) | + (base_color_1_value >= base_color_2_value)]; + + for (i = 0; i < 3; i++) { + block->paint_colors[0][i] = etc2_clamp(block->base_colors[0][i] + + block->distance); + block->paint_colors[1][i] = etc2_clamp(block->base_colors[0][i] - + block->distance); + block->paint_colors[2][i] = etc2_clamp(block->base_colors[1][i] + + block->distance); + block->paint_colors[3][i] = etc2_clamp(block->base_colors[1][i] - + block->distance); + } + } + else if (B_plus_dB < 0 || B_plus_dB > 31) { + /* Planar mode */ + block->is_planar_mode = true; + + /* opaque bit must be set in planar mode */ + if (!block->opaque) + block->opaque = true; + + for (i = 0; i < 3; i++) { + block->base_colors[0][i] = etc2_base_color_o_planar(src, i); + block->base_colors[1][i] = etc2_base_color_h_planar(src, i); + block->base_colors[2][i] = etc2_base_color_v_planar(src, i); + } + } + else if (diffbit || punchthrough_alpha) { + /* differential mode */ + block->is_diff_mode = true; + + for (i = 0; i < 3; i++) { + /* Texture decode algorithm is same for differential mode in etc1 + * & etc2. + */ + block->base_colors[0][i] = etc1_base_color_diff_hi(src[i]); + block->base_colors[1][i] = etc1_base_color_diff_lo(src[i]); + } + } + + if (block->is_ind_mode || block->is_diff_mode) { + int table1_idx = (src[3] >> 5) & 0x7; + int table2_idx = (src[3] >> 2) & 0x7; + + /* Use same modifier tables as for etc1 textures if opaque bit is set + * or if non punchthrough texture format + */ + block->modifier_tables[0] = (block->opaque || !punchthrough_alpha) ? + etc1_modifier_tables[table1_idx] : + etc2_modifier_tables_non_opaque[table1_idx]; + block->modifier_tables[1] = (block->opaque || !punchthrough_alpha) ? + etc1_modifier_tables[table2_idx] : + etc2_modifier_tables_non_opaque[table2_idx]; + + block->flipped = (src[3] & 0x1); + } + + block->pixel_indices[0] = + (src[4] << 24) | (src[5] << 16) | (src[6] << 8) | src[7]; +} + +static void +etc2_rgb8_fetch_texel(const struct etc2_block *block, + int x, int y, uint8_t *dst, + GLboolean punchthrough_alpha) +{ + const uint8_t *base_color; + int modifier, bit, idx, blk; + + /* get pixel index */ + bit = y + x * 4; + idx = ((block->pixel_indices[0] >> (15 + bit)) & 0x2) | + ((block->pixel_indices[0] >> (bit)) & 0x1); + + if (block->is_ind_mode || block->is_diff_mode) { + /* check for punchthrough_alpha format */ + if (punchthrough_alpha) { + if (!block->opaque && idx == 2) { + dst[0] = dst[1] = dst[2] = dst[3] = 0; + return; + } + else + dst[3] = 255; + } + + /* Use pixel index and subblock to get the modifier */ + blk = (block->flipped) ? (y >= 2) : (x >= 2); + base_color = block->base_colors[blk]; + modifier = block->modifier_tables[blk][idx]; + + dst[0] = etc2_clamp(base_color[0] + modifier); + dst[1] = etc2_clamp(base_color[1] + modifier); + dst[2] = etc2_clamp(base_color[2] + modifier); + } + else if (block->is_t_mode || block->is_h_mode) { + /* check for punchthrough_alpha format */ + if (punchthrough_alpha) { + if (!block->opaque && idx == 2) { + dst[0] = dst[1] = dst[2] = dst[3] = 0; + return; + } + else + dst[3] = 255; + } + + /* Use pixel index to pick one of the paint colors */ + dst[0] = block->paint_colors[idx][0]; + dst[1] = block->paint_colors[idx][1]; + dst[2] = block->paint_colors[idx][2]; + } + else if (block->is_planar_mode) { + /* {R(x, y) = clamp255((x × (RH − RO) + y × (RV − RO) + 4 × RO + 2) >> 2) + * {G(x, y) = clamp255((x × (GH − GO) + y × (GV − GO) + 4 × GO + 2) >> 2) + * {B(x, y) = clamp255((x × (BH − BO) + y × (BV − BO) + 4 × BO + 2) >> 2) + */ + int red, green, blue; + red = (x * (block->base_colors[1][0] - block->base_colors[0][0]) + + y * (block->base_colors[2][0] - block->base_colors[0][0]) + + 4 * block->base_colors[0][0] + 2) >> 2; + + green = (x * (block->base_colors[1][1] - block->base_colors[0][1]) + + y * (block->base_colors[2][1] - block->base_colors[0][1]) + + 4 * block->base_colors[0][1] + 2) >> 2; + + blue = (x * (block->base_colors[1][2] - block->base_colors[0][2]) + + y * (block->base_colors[2][2] - block->base_colors[0][2]) + + 4 * block->base_colors[0][2] + 2) >> 2; + + dst[0] = etc2_clamp(red); + dst[1] = etc2_clamp(green); + dst[2] = etc2_clamp(blue); + + /* check for punchthrough_alpha format */ + if (punchthrough_alpha) + dst[3] = 255; + } +} + +static void +etc2_alpha8_fetch_texel(const struct etc2_block *block, + int x, int y, uint8_t *dst) +{ + int modifier, alpha, idx; + /* get pixel index */ + idx = etc2_get_pixel_index(block, x, y); + modifier = etc2_modifier_tables[block->table_index][idx]; + alpha = block->base_codeword + modifier * block->multiplier; + dst[3] = etc2_clamp(alpha); +} + +static void +etc2_r11_fetch_texel(const struct etc2_block *block, + int x, int y, uint8_t *dst) +{ + GLint modifier, idx; + GLshort color; + /* Get pixel index */ + idx = etc2_get_pixel_index(block, x, y); + modifier = etc2_modifier_tables[block->table_index][idx]; + + if (block->multiplier != 0) + /* clamp2(base codeword × 8 + 4 + modifier × multiplier × 8) */ + color = etc2_clamp2(((block->base_codeword << 3) | 0x4) + + ((modifier * block->multiplier) << 3)); + else + color = etc2_clamp2(((block->base_codeword << 3) | 0x4) + modifier); + + /* Extend 11 bits color value to 16 bits. OpenGL ES 3.0 specification + * allows extending the color value to any number of bits. But, an + * implementation is not allowed to truncate the 11-bit value to less than + * 11 bits." + */ + color = (color << 5) | (color >> 6); + ((GLushort *)dst)[0] = color; +} + +static void +etc2_signed_r11_fetch_texel(const struct etc2_block *block, + int x, int y, uint8_t *dst) +{ + GLint modifier, idx; + GLshort color; + GLbyte base_codeword = (GLbyte) block->base_codeword; + + if (base_codeword == -128) + base_codeword = -127; + + /* Get pixel index */ + idx = etc2_get_pixel_index(block, x, y); + modifier = etc2_modifier_tables[block->table_index][idx]; + + if (block->multiplier != 0) + /* clamp3(base codeword × 8 + modifier × multiplier × 8) */ + color = etc2_clamp3((base_codeword << 3) + + ((modifier * block->multiplier) << 3)); + else + color = etc2_clamp3((base_codeword << 3) + modifier); + + /* Extend 11 bits color value to 16 bits. OpenGL ES 3.0 specification + * allows extending the color value to any number of bits. But, an + * implementation is not allowed to truncate the 11-bit value to less than + * 11 bits. A negative 11-bit value must first be made positive before bit + * replication, and then made negative again + */ + if (color >= 0) + color = (color << 5) | (color >> 5); + else { + color = -color; + color = (color << 5) | (color >> 5); + color = -color; + } + ((GLshort *)dst)[0] = color; +} + +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_r11_parse_block(struct etc2_block *block, const uint8_t *src) +{ + /* Parsing logic remains same as for etc2_alpha8_parse_block */ + etc2_alpha8_parse_block(block, src); +} + +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, + false /* punchthrough_alpha */); + /* 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, + false /* punchthrough_alpha */); + etc2_alpha8_fetch_texel(block, x, y, dst); +} + +static void +etc2_unpack_rgb8(uint8_t *dst_row, + unsigned dst_stride, + const uint8_t *src_row, + unsigned src_stride, + unsigned width, + unsigned height) +{ + const unsigned bw = 4, bh = 4, bs = 8, 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_rgb8_parse_block(&block, src, + false /* punchthrough_alpha */); + + for (j = 0; j < bh; j++) { + uint8_t *dst = dst_row + (y + j) * dst_stride + x * comps; + for (i = 0; i < bw; i++) { + etc2_rgb8_fetch_texel(&block, i, j, dst, + false /* punchthrough_alpha */); + dst[3] = 255; + dst += comps; + } + } + + src += bs; + } + + src_row += src_stride; + } +} + +static void +etc2_unpack_srgb8(uint8_t *dst_row, + unsigned dst_stride, + const uint8_t *src_row, + unsigned src_stride, + unsigned width, + unsigned height) +{ + const unsigned bw = 4, bh = 4, bs = 8, comps = 4; + struct etc2_block block; + unsigned x, y, i, j; + uint8_t tmp; + + for (y = 0; y < height; y += bh) { + const uint8_t *src = src_row; + + for (x = 0; x < width; x+= bw) { + etc2_rgb8_parse_block(&block, src, + false /* punchthrough_alpha */); + + for (j = 0; j < bh; j++) { + uint8_t *dst = dst_row + (y + j) * dst_stride + x * comps; + for (i = 0; i < bw; i++) { + etc2_rgb8_fetch_texel(&block, i, j, dst, + false /* punchthrough_alpha */); + /* Convert to MESA_FORMAT_SARGB8 */ + tmp = dst[0]; + dst[0] = dst[2]; + dst[2] = tmp; + dst[3] = 255; + + dst += comps; + } + } + src += bs; + } + + src_row += src_stride; + } +} + +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; + } +} + +static void +etc2_unpack_srgb8_alpha8(uint8_t *dst_row, + unsigned dst_stride, + const uint8_t *src_row, + unsigned src_stride, + unsigned width, + unsigned height) +{ + /* If internalformat is COMPRESSED_SRGB8_ALPHA8_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; + uint8_t tmp; + + 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); + + /* Convert to MESA_FORMAT_SARGB8 */ + tmp = dst[0]; + dst[0] = dst[2]; + dst[2] = tmp; + dst[3] = dst[3]; + + dst += comps; + } + } + src += bs; + } + + src_row += src_stride; + } +} + +static void +etc2_unpack_r11(uint8_t *dst_row, + unsigned dst_stride, + const uint8_t *src_row, + unsigned src_stride, + unsigned width, + unsigned height) +{ + /* If internalformat is COMPRESSED_R11_EAC, each 4 × 4 block of + color information is compressed to 64 bits. + */ + const unsigned bw = 4, bh = 4, bs = 8, comps = 1, 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) { + 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_r11_fetch_texel(&block, i, j, dst); + dst += comps * comp_size; + } + } + src += bs; + } + + src_row += src_stride; + } +} + +static void +etc2_unpack_rg11(uint8_t *dst_row, + unsigned dst_stride, + const uint8_t *src_row, + unsigned src_stride, + unsigned width, + unsigned height) +{ + /* If internalformat is COMPRESSED_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_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_r11_fetch_texel(&block, i, j, dst + comp_size); + dst += comps * comp_size; + } + } + src += bs; + } + + src_row += src_stride; + } +} + +static void +etc2_unpack_signed_r11(uint8_t *dst_row, + unsigned dst_stride, + const uint8_t *src_row, + unsigned src_stride, + unsigned width, + unsigned height) +{ + /* If internalformat is COMPRESSED_SIGNED_R11_EAC, each 4 × 4 block of + red color information is compressed to 64 bits. + */ + const unsigned bw = 4, bh = 4, bs = 8, comps = 1, 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) { + 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; + } + } + src += bs; + } + + src_row += src_stride; + } +} + +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; + } +} + +static void +etc2_unpack_rgb8_punchthrough_alpha1(uint8_t *dst_row, + unsigned dst_stride, + const uint8_t *src_row, + unsigned src_stride, + unsigned width, + unsigned height) +{ + const unsigned bw = 4, bh = 4, bs = 8, 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_rgb8_parse_block(&block, src, + true /* punchthrough_alpha */); + for (j = 0; j < bh; j++) { + uint8_t *dst = dst_row + (y + j) * dst_stride + x * comps; + for (i = 0; i < bw; i++) { + etc2_rgb8_fetch_texel(&block, i, j, dst, + true /* punchthrough_alpha */); + dst += comps; + } + } + + src += bs; + } + + src_row += src_stride; + } +} + +static void +etc2_unpack_srgb8_punchthrough_alpha1(uint8_t *dst_row, + unsigned dst_stride, + const uint8_t *src_row, + unsigned src_stride, + unsigned width, + unsigned height) +{ + const unsigned bw = 4, bh = 4, bs = 8, comps = 4; + struct etc2_block block; + unsigned x, y, i, j; + uint8_t tmp; + + for (y = 0; y < height; y += bh) { + const uint8_t *src = src_row; + + for (x = 0; x < width; x+= bw) { + etc2_rgb8_parse_block(&block, src, + true /* punchthrough_alpha */); + for (j = 0; j < bh; j++) { + uint8_t *dst = dst_row + (y + j) * dst_stride + x * comps; + for (i = 0; i < bw; i++) { + etc2_rgb8_fetch_texel(&block, i, j, dst, + true /* punchthrough_alpha */); + /* Convert to MESA_FORMAT_SARGB8 */ + tmp = dst[0]; + dst[0] = dst[2]; + dst[2] = tmp; + dst[3] = dst[3]; + + dst += comps; + } + } + + src += bs; + } + + src_row += src_stride; + } +} + +/* ETC2 texture formats are valid in glCompressedTexImage2D and + * glCompressedTexSubImage2D functions */ +GLboolean +_mesa_texstore_etc2_rgb8(TEXSTORE_PARAMS) +{ + ASSERT(0); + + return GL_FALSE; +} + +GLboolean +_mesa_texstore_etc2_srgb8(TEXSTORE_PARAMS) +{ + ASSERT(0); + + return GL_FALSE; +} + +GLboolean +_mesa_texstore_etc2_rgba8_eac(TEXSTORE_PARAMS) +{ + ASSERT(0); + + return GL_FALSE; +} + +GLboolean +_mesa_texstore_etc2_srgb8_alpha8_eac(TEXSTORE_PARAMS) +{ + ASSERT(0); + + return GL_FALSE; +} + +GLboolean +_mesa_texstore_etc2_r11_eac(TEXSTORE_PARAMS) +{ + ASSERT(0); + + return GL_FALSE; +} + +GLboolean +_mesa_texstore_etc2_signed_r11_eac(TEXSTORE_PARAMS) +{ + ASSERT(0); + + return GL_FALSE; +} + +GLboolean +_mesa_texstore_etc2_rg11_eac(TEXSTORE_PARAMS) +{ + ASSERT(0); + + return GL_FALSE; +} + +GLboolean +_mesa_texstore_etc2_signed_rg11_eac(TEXSTORE_PARAMS) +{ + ASSERT(0); + + return GL_FALSE; +} + +GLboolean +_mesa_texstore_etc2_rgb8_punchthrough_alpha1(TEXSTORE_PARAMS) +{ + ASSERT(0); + + return GL_FALSE; +} + +GLboolean +_mesa_texstore_etc2_srgb8_punchthrough_alpha1(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) +{ + struct etc2_block block; + uint8_t dst[3]; + const uint8_t *src; + + src = texImage->Map + + (((texImage->RowStride + 3) / 4) * (j / 4) + (i / 4)) * 8; + + etc2_rgb8_parse_block(&block, src, + false /* punchthrough_alpha */); + etc2_rgb8_fetch_texel(&block, i % 4, j % 4, dst, + false /* punchthrough_alpha */); + + texel[RCOMP] = UBYTE_TO_FLOAT(dst[0]); + texel[GCOMP] = UBYTE_TO_FLOAT(dst[1]); + texel[BCOMP] = UBYTE_TO_FLOAT(dst[2]); + texel[ACOMP] = 1.0f; +} + +void +_mesa_fetch_texel_2d_f_etc2_srgb8(const struct swrast_texture_image *texImage, + GLint i, GLint j, GLint k, GLfloat *texel) +{ + struct etc2_block block; + uint8_t dst[3]; + const uint8_t *src; + + src = texImage->Map + + (((texImage->RowStride + 3) / 4) * (j / 4) + (i / 4)) * 8; + + etc2_rgb8_parse_block(&block, src, + false /* punchthrough_alpha */); + etc2_rgb8_fetch_texel(&block, i % 4, j % 4, dst, + false /* punchthrough_alpha */); + + texel[RCOMP] = _mesa_nonlinear_to_linear(dst[0]); + texel[GCOMP] = _mesa_nonlinear_to_linear(dst[1]); + texel[BCOMP] = _mesa_nonlinear_to_linear(dst[2]); + 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]); +} + +void +_mesa_fetch_texel_2d_f_etc2_srgb8_alpha8_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] = _mesa_nonlinear_to_linear(dst[0]); + texel[GCOMP] = _mesa_nonlinear_to_linear(dst[1]); + texel[BCOMP] = _mesa_nonlinear_to_linear(dst[2]); + texel[ACOMP] = UBYTE_TO_FLOAT(dst[3]); +} + +void +_mesa_fetch_texel_2d_f_etc2_r11_eac(const struct swrast_texture_image *texImage, + GLint i, GLint j, GLint k, GLfloat *texel) +{ + struct etc2_block block; + GLushort dst; + const uint8_t *src; + + src = texImage->Map + + (((texImage->RowStride + 3) / 4) * (j / 4) + (i / 4)) * 8; + + etc2_r11_parse_block(&block, src); + etc2_r11_fetch_texel(&block, i % 4, j % 4, (uint8_t *)&dst); + + texel[RCOMP] = USHORT_TO_FLOAT(dst); + texel[GCOMP] = 0.0f; + texel[BCOMP] = 0.0f; + texel[ACOMP] = 1.0f; +} + +void +_mesa_fetch_texel_2d_f_etc2_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_r11_fetch_texel(&block, i % 4, j % 4, (uint8_t *)dst); + + /* green component */ + etc2_r11_parse_block(&block, src + 8); + etc2_r11_fetch_texel(&block, i % 4, j % 4, (uint8_t *)(dst + 1)); + + texel[RCOMP] = USHORT_TO_FLOAT(dst[0]); + texel[GCOMP] = USHORT_TO_FLOAT(dst[1]); + texel[BCOMP] = 0.0f; + texel[ACOMP] = 1.0f; +} + +void +_mesa_fetch_texel_2d_f_etc2_signed_r11_eac(const struct swrast_texture_image *texImage, + GLint i, GLint j, GLint k, GLfloat *texel) +{ + struct etc2_block block; + GLushort dst; + const uint8_t *src; + + src = texImage->Map + + (((texImage->RowStride + 3) / 4) * (j / 4) + (i / 4)) * 8; + + etc2_r11_parse_block(&block, src); + etc2_signed_r11_fetch_texel(&block, i % 4, j % 4, (uint8_t *)&dst); + + texel[RCOMP] = SHORT_TO_FLOAT(dst); + texel[GCOMP] = 0.0f; + texel[BCOMP] = 0.0f; + 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; +} + +void +_mesa_fetch_texel_2d_f_etc2_rgb8_punchthrough_alpha1( + 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)) * 8; + + etc2_rgb8_parse_block(&block, src, + true /* punchthrough alpha */); + etc2_rgb8_fetch_texel(&block, i % 4, j % 4, dst, + true /* punchthrough alpha */); + 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]); +} + +void +_mesa_fetch_texel_2d_f_etc2_srgb8_punchthrough_alpha1( + 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)) * 8; + + etc2_rgb8_parse_block(&block, src, + true /* punchthrough alpha */); + etc2_rgb8_fetch_texel(&block, i % 4, j % 4, dst, + true /* punchthrough alpha */); + texel[RCOMP] = _mesa_nonlinear_to_linear(dst[0]); + texel[GCOMP] = _mesa_nonlinear_to_linear(dst[1]); + texel[BCOMP] = _mesa_nonlinear_to_linear(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` + * `MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC` + * `MESA_FORMAT_ETC2_R11_EAC` + * `MESA_FORMAT_ETC2_RG11_EAC` + * `MESA_FORMAT_ETC2_SIGNED_R11_EAC` + * `MESA_FORMAT_ETC2_SIGNED_RG11_EAC` + * `MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1` + * `MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1` + * + * 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. + * + * \param src_width in pixels + * \param src_height in pixels + * \param dst_stride in bytes + */ + +void +_mesa_unpack_etc2_format(uint8_t *dst_row, + unsigned dst_stride, + const uint8_t *src_row, + unsigned src_stride, + unsigned src_width, + unsigned src_height, + gl_format format) +{ + if (format == MESA_FORMAT_ETC2_RGB8) + etc2_unpack_rgb8(dst_row, dst_stride, + src_row, src_stride, + src_width, src_height); + else if (format == MESA_FORMAT_ETC2_SRGB8) + 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); + else if (format == MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC) + etc2_unpack_srgb8_alpha8(dst_row, dst_stride, + src_row, src_stride, + src_width, src_height); + else if (format == MESA_FORMAT_ETC2_R11_EAC) + etc2_unpack_r11(dst_row, dst_stride, + src_row, src_stride, + src_width, src_height); + else if (format == MESA_FORMAT_ETC2_RG11_EAC) + etc2_unpack_rg11(dst_row, dst_stride, + src_row, src_stride, + src_width, src_height); + else if (format == MESA_FORMAT_ETC2_SIGNED_R11_EAC) + 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); + else if (format == MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1) + etc2_unpack_rgb8_punchthrough_alpha1(dst_row, dst_stride, + src_row, src_stride, + src_width, src_height); + else if (format == MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1) + etc2_unpack_srgb8_punchthrough_alpha1(dst_row, dst_stride, + src_row, src_stride, + src_width, src_height); +} |