Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5564 | serge | 1 | /* |
| 2 | * Copyright (C) 2011 LunarG, Inc. |
||
| 3 | * |
||
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
||
| 5 | * copy of this software and associated documentation files (the "Software"), |
||
| 6 | * to deal in the Software without restriction, including without limitation |
||
| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
||
| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
||
| 9 | * Software is furnished to do so, subject to the following conditions: |
||
| 10 | * |
||
| 11 | * The above copyright notice and this permission notice (including the next |
||
| 12 | * paragraph) shall be included in all copies or substantial portions of the |
||
| 13 | * Software. |
||
| 14 | * |
||
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
||
| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
||
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
||
| 18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
||
| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
||
| 20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
||
| 21 | * DEALINGS IN THE SOFTWARE. |
||
| 22 | */ |
||
| 23 | |||
| 24 | /** |
||
| 25 | * \file texcompress_etc.c |
||
| 26 | * GL_OES_compressed_ETC1_RGB8_texture support. |
||
| 27 | * Supported ETC2 texture formats are: |
||
| 28 | * GL_COMPRESSED_RGB8_ETC2 |
||
| 29 | * GL_COMPRESSED_SRGB8_ETC2 |
||
| 30 | * GL_COMPRESSED_RGBA8_ETC2_EAC |
||
| 31 | * GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC |
||
| 32 | * GL_COMPRESSED_R11_EAC |
||
| 33 | * GL_COMPRESSED_RG11_EAC |
||
| 34 | * GL_COMPRESSED_SIGNED_R11_EAC |
||
| 35 | * GL_COMPRESSED_SIGNED_RG11_EAC |
||
| 36 | * MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1 |
||
| 37 | * MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1 |
||
| 38 | */ |
||
| 39 | |||
| 40 | #include |
||
| 41 | #include "texcompress.h" |
||
| 42 | #include "texcompress_etc.h" |
||
| 43 | #include "texstore.h" |
||
| 44 | #include "macros.h" |
||
| 45 | #include "format_unpack.h" |
||
| 46 | #include "util/format_srgb.h" |
||
| 47 | |||
| 48 | |||
| 49 | struct etc2_block { |
||
| 50 | int distance; |
||
| 51 | uint64_t pixel_indices[2]; |
||
| 52 | const int *modifier_tables[2]; |
||
| 53 | bool flipped; |
||
| 54 | bool opaque; |
||
| 55 | bool is_ind_mode; |
||
| 56 | bool is_diff_mode; |
||
| 57 | bool is_t_mode; |
||
| 58 | bool is_h_mode; |
||
| 59 | bool is_planar_mode; |
||
| 60 | uint8_t base_colors[3][3]; |
||
| 61 | uint8_t paint_colors[4][3]; |
||
| 62 | uint8_t base_codeword; |
||
| 63 | uint8_t multiplier; |
||
| 64 | uint8_t table_index; |
||
| 65 | }; |
||
| 66 | |||
| 67 | static const int etc2_distance_table[8] = { |
||
| 68 | 3, 6, 11, 16, 23, 32, 41, 64 }; |
||
| 69 | |||
| 70 | static const int etc2_modifier_tables[16][8] = { |
||
| 71 | { -3, -6, -9, -15, 2, 5, 8, 14}, |
||
| 72 | { -3, -7, -10, -13, 2, 6, 9, 12}, |
||
| 73 | { -2, -5, -8, -13, 1, 4, 7, 12}, |
||
| 74 | { -2, -4, -6, -13, 1, 3, 5, 12}, |
||
| 75 | { -3, -6, -8, -12, 2, 5, 7, 11}, |
||
| 76 | { -3, -7, -9, -11, 2, 6, 8, 10}, |
||
| 77 | { -4, -7, -8, -11, 3, 6, 7, 10}, |
||
| 78 | { -3, -5, -8, -11, 2, 4, 7, 10}, |
||
| 79 | { -2, -6, -8, -10, 1, 5, 7, 9}, |
||
| 80 | { -2, -5, -8, -10, 1, 4, 7, 9}, |
||
| 81 | { -2, -4, -8, -10, 1, 3, 7, 9}, |
||
| 82 | { -2, -5, -7, -10, 1, 4, 6, 9}, |
||
| 83 | { -3, -4, -7, -10, 2, 3, 6, 9}, |
||
| 84 | { -1, -2, -3, -10, 0, 1, 2, 9}, |
||
| 85 | { -4, -6, -8, -9, 3, 5, 7, 8}, |
||
| 86 | { -3, -5, -7, -9, 2, 4, 6, 8}, |
||
| 87 | }; |
||
| 88 | |||
| 89 | static const int etc2_modifier_tables_non_opaque[8][4] = { |
||
| 90 | { 0, 8, 0, -8}, |
||
| 91 | { 0, 17, 0, -17}, |
||
| 92 | { 0, 29, 0, -29}, |
||
| 93 | { 0, 42, 0, -42}, |
||
| 94 | { 0, 60, 0, -60}, |
||
| 95 | { 0, 80, 0, -80}, |
||
| 96 | { 0, 106, 0, -106}, |
||
| 97 | { 0, 183, 0, -183} |
||
| 98 | }; |
||
| 99 | |||
| 100 | /* define etc1_parse_block and etc. */ |
||
| 101 | #define UINT8_TYPE GLubyte |
||
| 102 | #define TAG(x) x |
||
| 103 | #include "texcompress_etc_tmp.h" |
||
| 104 | #undef TAG |
||
| 105 | #undef UINT8_TYPE |
||
| 106 | |||
| 107 | GLboolean |
||
| 108 | _mesa_texstore_etc1_rgb8(TEXSTORE_PARAMS) |
||
| 109 | { |
||
| 110 | /* GL_ETC1_RGB8_OES is only valid in glCompressedTexImage2D */ |
||
| 111 | assert(0); |
||
| 112 | |||
| 113 | return GL_FALSE; |
||
| 114 | } |
||
| 115 | |||
| 116 | |||
| 117 | /** |
||
| 118 | * Decode texture data in format `MESA_FORMAT_ETC1_RGB8` to |
||
| 119 | * `MESA_FORMAT_ABGR8888`. |
||
| 120 | * |
||
| 121 | * The size of the source data must be a multiple of the ETC1 block size, |
||
| 122 | * which is 8, even if the texture image's dimensions are not aligned to 4. |
||
| 123 | * From the GL_OES_compressed_ETC1_RGB8_texture spec: |
||
| 124 | * The texture is described as a number of 4x4 pixel blocks. If the |
||
| 125 | * texture (or a particular mip-level) is smaller than 4 pixels in |
||
| 126 | * any dimension (such as a 2x2 or a 8x1 texture), the texture is |
||
| 127 | * found in the upper left part of the block(s), and the rest of the |
||
| 128 | * pixels are not used. For instance, a texture of size 4x2 will be |
||
| 129 | * placed in the upper half of a 4x4 block, and the lower half of the |
||
| 130 | * pixels in the block will not be accessed. |
||
| 131 | * |
||
| 132 | * \param src_width in pixels |
||
| 133 | * \param src_height in pixels |
||
| 134 | * \param dst_stride in bytes |
||
| 135 | */ |
||
| 136 | void |
||
| 137 | _mesa_etc1_unpack_rgba8888(uint8_t *dst_row, |
||
| 138 | unsigned dst_stride, |
||
| 139 | const uint8_t *src_row, |
||
| 140 | unsigned src_stride, |
||
| 141 | unsigned src_width, |
||
| 142 | unsigned src_height) |
||
| 143 | { |
||
| 144 | etc1_unpack_rgba8888(dst_row, dst_stride, |
||
| 145 | src_row, src_stride, |
||
| 146 | src_width, src_height); |
||
| 147 | } |
||
| 148 | |||
| 149 | static uint8_t |
||
| 150 | etc2_base_color1_t_mode(const uint8_t *in, GLuint index) |
||
| 151 | { |
||
| 152 | uint8_t R1a = 0, x = 0; |
||
| 153 | /* base col 1 = extend_4to8bits( (R1a << 2) | R1b, G1, B1) */ |
||
| 154 | switch(index) { |
||
| 155 | case 0: |
||
| 156 | R1a = (in[0] >> 3) & 0x3; |
||
| 157 | x = ((R1a << 2) | (in[0] & 0x3)); |
||
| 158 | break; |
||
| 159 | case 1: |
||
| 160 | x = ((in[1] >> 4) & 0xf); |
||
| 161 | break; |
||
| 162 | case 2: |
||
| 163 | x = (in[1] & 0xf); |
||
| 164 | break; |
||
| 165 | default: |
||
| 166 | /* invalid index */ |
||
| 167 | break; |
||
| 168 | } |
||
| 169 | return ((x << 4) | (x & 0xf)); |
||
| 170 | } |
||
| 171 | |||
| 172 | static uint8_t |
||
| 173 | etc2_base_color2_t_mode(const uint8_t *in, GLuint index) |
||
| 174 | { |
||
| 175 | uint8_t x = 0; |
||
| 176 | /*extend 4to8bits(R2, G2, B2)*/ |
||
| 177 | switch(index) { |
||
| 178 | case 0: |
||
| 179 | x = ((in[2] >> 4) & 0xf ); |
||
| 180 | break; |
||
| 181 | case 1: |
||
| 182 | x = (in[2] & 0xf); |
||
| 183 | break; |
||
| 184 | case 2: |
||
| 185 | x = ((in[3] >> 4) & 0xf); |
||
| 186 | break; |
||
| 187 | default: |
||
| 188 | /* invalid index */ |
||
| 189 | break; |
||
| 190 | } |
||
| 191 | return ((x << 4) | (x & 0xf)); |
||
| 192 | } |
||
| 193 | |||
| 194 | static uint8_t |
||
| 195 | etc2_base_color1_h_mode(const uint8_t *in, GLuint index) |
||
| 196 | { |
||
| 197 | uint8_t x = 0; |
||
| 198 | /* base col 1 = extend 4to8bits(R1, (G1a << 1) | G1b, (B1a << 3) | B1b) */ |
||
| 199 | switch(index) { |
||
| 200 | case 0: |
||
| 201 | x = ((in[0] >> 3) & 0xf); |
||
| 202 | break; |
||
| 203 | case 1: |
||
| 204 | x = (((in[0] & 0x7) << 1) | ((in[1] >> 4) & 0x1)); |
||
| 205 | break; |
||
| 206 | case 2: |
||
| 207 | x = ((in[1] & 0x8) | |
||
| 208 | (((in[1] & 0x3) << 1) | ((in[2] >> 7) & 0x1))); |
||
| 209 | break; |
||
| 210 | default: |
||
| 211 | /* invalid index */ |
||
| 212 | break; |
||
| 213 | } |
||
| 214 | return ((x << 4) | (x & 0xf)); |
||
| 215 | } |
||
| 216 | |||
| 217 | static uint8_t |
||
| 218 | etc2_base_color2_h_mode(const uint8_t *in, GLuint index) |
||
| 219 | { |
||
| 220 | uint8_t x = 0; |
||
| 221 | /* base col 2 = extend 4to8bits(R2, G2, B2) */ |
||
| 222 | switch(index) { |
||
| 223 | case 0: |
||
| 224 | x = ((in[2] >> 3) & 0xf ); |
||
| 225 | break; |
||
| 226 | case 1: |
||
| 227 | x = (((in[2] & 0x7) << 1) | ((in[3] >> 7) & 0x1)); |
||
| 228 | break; |
||
| 229 | case 2: |
||
| 230 | x = ((in[3] >> 3) & 0xf); |
||
| 231 | break; |
||
| 232 | default: |
||
| 233 | /* invalid index */ |
||
| 234 | break; |
||
| 235 | } |
||
| 236 | return ((x << 4) | (x & 0xf)); |
||
| 237 | } |
||
| 238 | |||
| 239 | static uint8_t |
||
| 240 | etc2_base_color_o_planar(const uint8_t *in, GLuint index) |
||
| 241 | { |
||
| 242 | GLuint tmp; |
||
| 243 | switch(index) { |
||
| 244 | case 0: |
||
| 245 | tmp = ((in[0] >> 1) & 0x3f); /* RO */ |
||
| 246 | return ((tmp << 2) | (tmp >> 4)); |
||
| 247 | case 1: |
||
| 248 | tmp = (((in[0] & 0x1) << 6) | /* GO1 */ |
||
| 249 | ((in[1] >> 1) & 0x3f)); /* GO2 */ |
||
| 250 | return ((tmp << 1) | (tmp >> 6)); |
||
| 251 | case 2: |
||
| 252 | tmp = (((in[1] & 0x1) << 5) | /* BO1 */ |
||
| 253 | (in[2] & 0x18) | /* BO2 */ |
||
| 254 | (((in[2] & 0x3) << 1) | ((in[3] >> 7) & 0x1))); /* BO3 */ |
||
| 255 | return ((tmp << 2) | (tmp >> 4)); |
||
| 256 | default: |
||
| 257 | /* invalid index */ |
||
| 258 | return 0; |
||
| 259 | } |
||
| 260 | } |
||
| 261 | |||
| 262 | static uint8_t |
||
| 263 | etc2_base_color_h_planar(const uint8_t *in, GLuint index) |
||
| 264 | { |
||
| 265 | GLuint tmp; |
||
| 266 | switch(index) { |
||
| 267 | case 0: |
||
| 268 | tmp = (((in[3] & 0x7c) >> 1) | /* RH1 */ |
||
| 269 | (in[3] & 0x1)); /* RH2 */ |
||
| 270 | return ((tmp << 2) | (tmp >> 4)); |
||
| 271 | case 1: |
||
| 272 | tmp = (in[4] >> 1) & 0x7f; /* GH */ |
||
| 273 | return ((tmp << 1) | (tmp >> 6)); |
||
| 274 | case 2: |
||
| 275 | tmp = (((in[4] & 0x1) << 5) | |
||
| 276 | ((in[5] >> 3) & 0x1f)); /* BH */ |
||
| 277 | return ((tmp << 2) | (tmp >> 4)); |
||
| 278 | default: |
||
| 279 | /* invalid index */ |
||
| 280 | return 0; |
||
| 281 | } |
||
| 282 | } |
||
| 283 | |||
| 284 | static uint8_t |
||
| 285 | etc2_base_color_v_planar(const uint8_t *in, GLuint index) |
||
| 286 | { |
||
| 287 | GLuint tmp; |
||
| 288 | switch(index) { |
||
| 289 | case 0: |
||
| 290 | tmp = (((in[5] & 0x7) << 0x3) | |
||
| 291 | ((in[6] >> 5) & 0x7)); /* RV */ |
||
| 292 | return ((tmp << 2) | (tmp >> 4)); |
||
| 293 | case 1: |
||
| 294 | tmp = (((in[6] & 0x1f) << 2) | |
||
| 295 | ((in[7] >> 6) & 0x3)); /* GV */ |
||
| 296 | return ((tmp << 1) | (tmp >> 6)); |
||
| 297 | case 2: |
||
| 298 | tmp = in[7] & 0x3f; /* BV */ |
||
| 299 | return ((tmp << 2) | (tmp >> 4)); |
||
| 300 | default: |
||
| 301 | /* invalid index */ |
||
| 302 | return 0; |
||
| 303 | } |
||
| 304 | } |
||
| 305 | |||
| 306 | static GLint |
||
| 307 | etc2_get_pixel_index(const struct etc2_block *block, int x, int y) |
||
| 308 | { |
||
| 309 | int bit = ((3 - y) + (3 - x) * 4) * 3; |
||
| 310 | int idx = (block->pixel_indices[1] >> bit) & 0x7; |
||
| 311 | return idx; |
||
| 312 | } |
||
| 313 | |||
| 314 | static uint8_t |
||
| 315 | etc2_clamp(int color) |
||
| 316 | { |
||
| 317 | /* CLAMP(color, 0, 255) */ |
||
| 318 | return (uint8_t) CLAMP(color, 0, 255); |
||
| 319 | } |
||
| 320 | |||
| 321 | static GLushort |
||
| 322 | etc2_clamp2(int color) |
||
| 323 | { |
||
| 324 | /* CLAMP(color, 0, 2047) */ |
||
| 325 | return (GLushort) CLAMP(color, 0, 2047); |
||
| 326 | } |
||
| 327 | |||
| 328 | static GLshort |
||
| 329 | etc2_clamp3(int color) |
||
| 330 | { |
||
| 331 | /* CLAMP(color, -1023, 1023) */ |
||
| 332 | return (GLshort) CLAMP(color, -1023, 1023); |
||
| 333 | } |
||
| 334 | |||
| 335 | static void |
||
| 336 | etc2_rgb8_parse_block(struct etc2_block *block, |
||
| 337 | const uint8_t *src, |
||
| 338 | GLboolean punchthrough_alpha) |
||
| 339 | { |
||
| 340 | unsigned i; |
||
| 341 | GLboolean diffbit = false; |
||
| 342 | static const int lookup[8] = { 0, 1, 2, 3, -4, -3, -2, -1 }; |
||
| 343 | |||
| 344 | const int R_plus_dR = (src[0] >> 3) + lookup[src[0] & 0x7]; |
||
| 345 | const int G_plus_dG = (src[1] >> 3) + lookup[src[1] & 0x7]; |
||
| 346 | const int B_plus_dB = (src[2] >> 3) + lookup[src[2] & 0x7]; |
||
| 347 | |||
| 348 | /* Reset the mode flags */ |
||
| 349 | block->is_ind_mode = false; |
||
| 350 | block->is_diff_mode = false; |
||
| 351 | block->is_t_mode = false; |
||
| 352 | block->is_h_mode = false; |
||
| 353 | block->is_planar_mode = false; |
||
| 354 | |||
| 355 | if (punchthrough_alpha) |
||
| 356 | block->opaque = src[3] & 0x2; |
||
| 357 | else |
||
| 358 | diffbit = src[3] & 0x2; |
||
| 359 | |||
| 360 | if (!diffbit && !punchthrough_alpha) { |
||
| 361 | /* individual mode */ |
||
| 362 | block->is_ind_mode = true; |
||
| 363 | |||
| 364 | for (i = 0; i < 3; i++) { |
||
| 365 | /* Texture decode algorithm is same for individual mode in etc1 |
||
| 366 | * & etc2. |
||
| 367 | */ |
||
| 368 | block->base_colors[0][i] = etc1_base_color_ind_hi(src[i]); |
||
| 369 | block->base_colors[1][i] = etc1_base_color_ind_lo(src[i]); |
||
| 370 | } |
||
| 371 | } |
||
| 372 | else if (R_plus_dR < 0 || R_plus_dR > 31){ |
||
| 373 | /* T mode */ |
||
| 374 | block->is_t_mode = true; |
||
| 375 | |||
| 376 | for(i = 0; i < 3; i++) { |
||
| 377 | block->base_colors[0][i] = etc2_base_color1_t_mode(src, i); |
||
| 378 | block->base_colors[1][i] = etc2_base_color2_t_mode(src, i); |
||
| 379 | } |
||
| 380 | /* pick distance */ |
||
| 381 | block->distance = |
||
| 382 | etc2_distance_table[(((src[3] >> 2) & 0x3) << 1) | |
||
| 383 | (src[3] & 0x1)]; |
||
| 384 | |||
| 385 | for (i = 0; i < 3; i++) { |
||
| 386 | block->paint_colors[0][i] = etc2_clamp(block->base_colors[0][i]); |
||
| 387 | block->paint_colors[1][i] = etc2_clamp(block->base_colors[1][i] + |
||
| 388 | block->distance); |
||
| 389 | block->paint_colors[2][i] = etc2_clamp(block->base_colors[1][i]); |
||
| 390 | block->paint_colors[3][i] = etc2_clamp(block->base_colors[1][i] - |
||
| 391 | block->distance); |
||
| 392 | } |
||
| 393 | } |
||
| 394 | else if (G_plus_dG < 0 || G_plus_dG > 31){ |
||
| 395 | int base_color_1_value, base_color_2_value; |
||
| 396 | |||
| 397 | /* H mode */ |
||
| 398 | block->is_h_mode = true; |
||
| 399 | |||
| 400 | for(i = 0; i < 3; i++) { |
||
| 401 | block->base_colors[0][i] = etc2_base_color1_h_mode(src, i); |
||
| 402 | block->base_colors[1][i] = etc2_base_color2_h_mode(src, i); |
||
| 403 | } |
||
| 404 | |||
| 405 | base_color_1_value = (block->base_colors[0][0] << 16) + |
||
| 406 | (block->base_colors[0][1] << 8) + |
||
| 407 | block->base_colors[0][2]; |
||
| 408 | base_color_2_value = (block->base_colors[1][0] << 16) + |
||
| 409 | (block->base_colors[1][1] << 8) + |
||
| 410 | block->base_colors[1][2]; |
||
| 411 | /* pick distance */ |
||
| 412 | block->distance = |
||
| 413 | etc2_distance_table[(src[3] & 0x4) | |
||
| 414 | ((src[3] & 0x1) << 1) | |
||
| 415 | (base_color_1_value >= base_color_2_value)]; |
||
| 416 | |||
| 417 | for (i = 0; i < 3; i++) { |
||
| 418 | block->paint_colors[0][i] = etc2_clamp(block->base_colors[0][i] + |
||
| 419 | block->distance); |
||
| 420 | block->paint_colors[1][i] = etc2_clamp(block->base_colors[0][i] - |
||
| 421 | block->distance); |
||
| 422 | block->paint_colors[2][i] = etc2_clamp(block->base_colors[1][i] + |
||
| 423 | block->distance); |
||
| 424 | block->paint_colors[3][i] = etc2_clamp(block->base_colors[1][i] - |
||
| 425 | block->distance); |
||
| 426 | } |
||
| 427 | } |
||
| 428 | else if (B_plus_dB < 0 || B_plus_dB > 31) { |
||
| 429 | /* Planar mode */ |
||
| 430 | block->is_planar_mode = true; |
||
| 431 | |||
| 432 | /* opaque bit must be set in planar mode */ |
||
| 433 | block->opaque = true; |
||
| 434 | |||
| 435 | for (i = 0; i < 3; i++) { |
||
| 436 | block->base_colors[0][i] = etc2_base_color_o_planar(src, i); |
||
| 437 | block->base_colors[1][i] = etc2_base_color_h_planar(src, i); |
||
| 438 | block->base_colors[2][i] = etc2_base_color_v_planar(src, i); |
||
| 439 | } |
||
| 440 | } |
||
| 441 | else if (diffbit || punchthrough_alpha) { |
||
| 442 | /* differential mode */ |
||
| 443 | block->is_diff_mode = true; |
||
| 444 | |||
| 445 | for (i = 0; i < 3; i++) { |
||
| 446 | /* Texture decode algorithm is same for differential mode in etc1 |
||
| 447 | * & etc2. |
||
| 448 | */ |
||
| 449 | block->base_colors[0][i] = etc1_base_color_diff_hi(src[i]); |
||
| 450 | block->base_colors[1][i] = etc1_base_color_diff_lo(src[i]); |
||
| 451 | } |
||
| 452 | } |
||
| 453 | |||
| 454 | if (block->is_ind_mode || block->is_diff_mode) { |
||
| 455 | int table1_idx = (src[3] >> 5) & 0x7; |
||
| 456 | int table2_idx = (src[3] >> 2) & 0x7; |
||
| 457 | |||
| 458 | /* Use same modifier tables as for etc1 textures if opaque bit is set |
||
| 459 | * or if non punchthrough texture format |
||
| 460 | */ |
||
| 461 | block->modifier_tables[0] = (block->opaque || !punchthrough_alpha) ? |
||
| 462 | etc1_modifier_tables[table1_idx] : |
||
| 463 | etc2_modifier_tables_non_opaque[table1_idx]; |
||
| 464 | block->modifier_tables[1] = (block->opaque || !punchthrough_alpha) ? |
||
| 465 | etc1_modifier_tables[table2_idx] : |
||
| 466 | etc2_modifier_tables_non_opaque[table2_idx]; |
||
| 467 | |||
| 468 | block->flipped = (src[3] & 0x1); |
||
| 469 | } |
||
| 470 | |||
| 471 | block->pixel_indices[0] = |
||
| 472 | (src[4] << 24) | (src[5] << 16) | (src[6] << 8) | src[7]; |
||
| 473 | } |
||
| 474 | |||
| 475 | static void |
||
| 476 | etc2_rgb8_fetch_texel(const struct etc2_block *block, |
||
| 477 | int x, int y, uint8_t *dst, |
||
| 478 | GLboolean punchthrough_alpha) |
||
| 479 | { |
||
| 480 | const uint8_t *base_color; |
||
| 481 | int modifier, bit, idx, blk; |
||
| 482 | |||
| 483 | /* get pixel index */ |
||
| 484 | bit = y + x * 4; |
||
| 485 | idx = ((block->pixel_indices[0] >> (15 + bit)) & 0x2) | |
||
| 486 | ((block->pixel_indices[0] >> (bit)) & 0x1); |
||
| 487 | |||
| 488 | if (block->is_ind_mode || block->is_diff_mode) { |
||
| 489 | /* check for punchthrough_alpha format */ |
||
| 490 | if (punchthrough_alpha) { |
||
| 491 | if (!block->opaque && idx == 2) { |
||
| 492 | dst[0] = dst[1] = dst[2] = dst[3] = 0; |
||
| 493 | return; |
||
| 494 | } |
||
| 495 | else |
||
| 496 | dst[3] = 255; |
||
| 497 | } |
||
| 498 | |||
| 499 | /* Use pixel index and subblock to get the modifier */ |
||
| 500 | blk = (block->flipped) ? (y >= 2) : (x >= 2); |
||
| 501 | base_color = block->base_colors[blk]; |
||
| 502 | modifier = block->modifier_tables[blk][idx]; |
||
| 503 | |||
| 504 | dst[0] = etc2_clamp(base_color[0] + modifier); |
||
| 505 | dst[1] = etc2_clamp(base_color[1] + modifier); |
||
| 506 | dst[2] = etc2_clamp(base_color[2] + modifier); |
||
| 507 | } |
||
| 508 | else if (block->is_t_mode || block->is_h_mode) { |
||
| 509 | /* check for punchthrough_alpha format */ |
||
| 510 | if (punchthrough_alpha) { |
||
| 511 | if (!block->opaque && idx == 2) { |
||
| 512 | dst[0] = dst[1] = dst[2] = dst[3] = 0; |
||
| 513 | return; |
||
| 514 | } |
||
| 515 | else |
||
| 516 | dst[3] = 255; |
||
| 517 | } |
||
| 518 | |||
| 519 | /* Use pixel index to pick one of the paint colors */ |
||
| 520 | dst[0] = block->paint_colors[idx][0]; |
||
| 521 | dst[1] = block->paint_colors[idx][1]; |
||
| 522 | dst[2] = block->paint_colors[idx][2]; |
||
| 523 | } |
||
| 524 | else if (block->is_planar_mode) { |
||
| 525 | /* {R(x, y) = clamp255((x × (RH − RO) + y × (RV − RO) + 4 × RO + 2) >> 2) |
||
| 526 | * {G(x, y) = clamp255((x × (GH − GO) + y × (GV − GO) + 4 × GO + 2) >> 2) |
||
| 527 | * {B(x, y) = clamp255((x × (BH − BO) + y × (BV − BO) + 4 × BO + 2) >> 2) |
||
| 528 | */ |
||
| 529 | int red, green, blue; |
||
| 530 | red = (x * (block->base_colors[1][0] - block->base_colors[0][0]) + |
||
| 531 | y * (block->base_colors[2][0] - block->base_colors[0][0]) + |
||
| 532 | 4 * block->base_colors[0][0] + 2) >> 2; |
||
| 533 | |||
| 534 | green = (x * (block->base_colors[1][1] - block->base_colors[0][1]) + |
||
| 535 | y * (block->base_colors[2][1] - block->base_colors[0][1]) + |
||
| 536 | 4 * block->base_colors[0][1] + 2) >> 2; |
||
| 537 | |||
| 538 | blue = (x * (block->base_colors[1][2] - block->base_colors[0][2]) + |
||
| 539 | y * (block->base_colors[2][2] - block->base_colors[0][2]) + |
||
| 540 | 4 * block->base_colors[0][2] + 2) >> 2; |
||
| 541 | |||
| 542 | dst[0] = etc2_clamp(red); |
||
| 543 | dst[1] = etc2_clamp(green); |
||
| 544 | dst[2] = etc2_clamp(blue); |
||
| 545 | |||
| 546 | /* check for punchthrough_alpha format */ |
||
| 547 | if (punchthrough_alpha) |
||
| 548 | dst[3] = 255; |
||
| 549 | } |
||
| 550 | } |
||
| 551 | |||
| 552 | static void |
||
| 553 | etc2_alpha8_fetch_texel(const struct etc2_block *block, |
||
| 554 | int x, int y, uint8_t *dst) |
||
| 555 | { |
||
| 556 | int modifier, alpha, idx; |
||
| 557 | /* get pixel index */ |
||
| 558 | idx = etc2_get_pixel_index(block, x, y); |
||
| 559 | modifier = etc2_modifier_tables[block->table_index][idx]; |
||
| 560 | alpha = block->base_codeword + modifier * block->multiplier; |
||
| 561 | dst[3] = etc2_clamp(alpha); |
||
| 562 | } |
||
| 563 | |||
| 564 | static void |
||
| 565 | etc2_r11_fetch_texel(const struct etc2_block *block, |
||
| 566 | int x, int y, uint8_t *dst) |
||
| 567 | { |
||
| 568 | GLint modifier, idx; |
||
| 569 | GLshort color; |
||
| 570 | /* Get pixel index */ |
||
| 571 | idx = etc2_get_pixel_index(block, x, y); |
||
| 572 | modifier = etc2_modifier_tables[block->table_index][idx]; |
||
| 573 | |||
| 574 | if (block->multiplier != 0) |
||
| 575 | /* clamp2(base codeword × 8 + 4 + modifier × multiplier × 8) */ |
||
| 576 | color = etc2_clamp2(((block->base_codeword << 3) | 0x4) + |
||
| 577 | ((modifier * block->multiplier) << 3)); |
||
| 578 | else |
||
| 579 | color = etc2_clamp2(((block->base_codeword << 3) | 0x4) + modifier); |
||
| 580 | |||
| 581 | /* Extend 11 bits color value to 16 bits. OpenGL ES 3.0 specification |
||
| 582 | * allows extending the color value to any number of bits. But, an |
||
| 583 | * implementation is not allowed to truncate the 11-bit value to less than |
||
| 584 | * 11 bits." |
||
| 585 | */ |
||
| 586 | color = (color << 5) | (color >> 6); |
||
| 587 | ((GLushort *)dst)[0] = color; |
||
| 588 | } |
||
| 589 | |||
| 590 | static void |
||
| 591 | etc2_signed_r11_fetch_texel(const struct etc2_block *block, |
||
| 592 | int x, int y, uint8_t *dst) |
||
| 593 | { |
||
| 594 | GLint modifier, idx; |
||
| 595 | GLshort color; |
||
| 596 | GLbyte base_codeword = (GLbyte) block->base_codeword; |
||
| 597 | |||
| 598 | if (base_codeword == -128) |
||
| 599 | base_codeword = -127; |
||
| 600 | |||
| 601 | /* Get pixel index */ |
||
| 602 | idx = etc2_get_pixel_index(block, x, y); |
||
| 603 | modifier = etc2_modifier_tables[block->table_index][idx]; |
||
| 604 | |||
| 605 | if (block->multiplier != 0) |
||
| 606 | /* clamp3(base codeword × 8 + modifier × multiplier × 8) */ |
||
| 607 | color = etc2_clamp3((base_codeword << 3) + |
||
| 608 | ((modifier * block->multiplier) << 3)); |
||
| 609 | else |
||
| 610 | color = etc2_clamp3((base_codeword << 3) + modifier); |
||
| 611 | |||
| 612 | /* Extend 11 bits color value to 16 bits. OpenGL ES 3.0 specification |
||
| 613 | * allows extending the color value to any number of bits. But, an |
||
| 614 | * implementation is not allowed to truncate the 11-bit value to less than |
||
| 615 | * 11 bits. A negative 11-bit value must first be made positive before bit |
||
| 616 | * replication, and then made negative again |
||
| 617 | */ |
||
| 618 | if (color >= 0) |
||
| 619 | color = (color << 5) | (color >> 5); |
||
| 620 | else { |
||
| 621 | color = -color; |
||
| 622 | color = (color << 5) | (color >> 5); |
||
| 623 | color = -color; |
||
| 624 | } |
||
| 625 | ((GLshort *)dst)[0] = color; |
||
| 626 | } |
||
| 627 | |||
| 628 | static void |
||
| 629 | etc2_alpha8_parse_block(struct etc2_block *block, const uint8_t *src) |
||
| 630 | { |
||
| 631 | block->base_codeword = src[0]; |
||
| 632 | block->multiplier = (src[1] >> 4) & 0xf; |
||
| 633 | block->table_index = src[1] & 0xf; |
||
| 634 | block->pixel_indices[1] = (((uint64_t)src[2] << 40) | |
||
| 635 | ((uint64_t)src[3] << 32) | |
||
| 636 | ((uint64_t)src[4] << 24) | |
||
| 637 | ((uint64_t)src[5] << 16) | |
||
| 638 | ((uint64_t)src[6] << 8) | |
||
| 639 | ((uint64_t)src[7])); |
||
| 640 | } |
||
| 641 | |||
| 642 | static void |
||
| 643 | etc2_r11_parse_block(struct etc2_block *block, const uint8_t *src) |
||
| 644 | { |
||
| 645 | /* Parsing logic remains same as for etc2_alpha8_parse_block */ |
||
| 646 | etc2_alpha8_parse_block(block, src); |
||
| 647 | } |
||
| 648 | |||
| 649 | static void |
||
| 650 | etc2_rgba8_parse_block(struct etc2_block *block, const uint8_t *src) |
||
| 651 | { |
||
| 652 | /* RGB component is parsed the same way as for MESA_FORMAT_ETC2_RGB8 */ |
||
| 653 | etc2_rgb8_parse_block(block, src + 8, |
||
| 654 | false /* punchthrough_alpha */); |
||
| 655 | /* Parse Alpha component */ |
||
| 656 | etc2_alpha8_parse_block(block, src); |
||
| 657 | } |
||
| 658 | |||
| 659 | static void |
||
| 660 | etc2_rgba8_fetch_texel(const struct etc2_block *block, |
||
| 661 | int x, int y, uint8_t *dst) |
||
| 662 | { |
||
| 663 | etc2_rgb8_fetch_texel(block, x, y, dst, |
||
| 664 | false /* punchthrough_alpha */); |
||
| 665 | etc2_alpha8_fetch_texel(block, x, y, dst); |
||
| 666 | } |
||
| 667 | |||
| 668 | static void |
||
| 669 | etc2_unpack_rgb8(uint8_t *dst_row, |
||
| 670 | unsigned dst_stride, |
||
| 671 | const uint8_t *src_row, |
||
| 672 | unsigned src_stride, |
||
| 673 | unsigned width, |
||
| 674 | unsigned height) |
||
| 675 | { |
||
| 676 | const unsigned bw = 4, bh = 4, bs = 8, comps = 4; |
||
| 677 | struct etc2_block block; |
||
| 678 | unsigned x, y, i, j; |
||
| 679 | |||
| 680 | for (y = 0; y < height; y += bh) { |
||
| 681 | const uint8_t *src = src_row; |
||
| 682 | /* |
||
| 683 | * Destination texture may not be a multiple of four texels in |
||
| 684 | * height. Compute a safe height to avoid writing outside the texture. |
||
| 685 | */ |
||
| 686 | const unsigned h = MIN2(bh, height - y); |
||
| 687 | |||
| 688 | for (x = 0; x < width; x+= bw) { |
||
| 689 | /* |
||
| 690 | * Destination texture may not be a multiple of four texels in |
||
| 691 | * width. Compute a safe width to avoid writing outside the texture. |
||
| 692 | */ |
||
| 693 | const unsigned w = MIN2(bw, width - x); |
||
| 694 | |||
| 695 | etc2_rgb8_parse_block(&block, src, |
||
| 696 | false /* punchthrough_alpha */); |
||
| 697 | |||
| 698 | for (j = 0; j < h; j++) { |
||
| 699 | uint8_t *dst = dst_row + (y + j) * dst_stride + x * comps; |
||
| 700 | for (i = 0; i < w; i++) { |
||
| 701 | etc2_rgb8_fetch_texel(&block, i, j, dst, |
||
| 702 | false /* punchthrough_alpha */); |
||
| 703 | dst[3] = 255; |
||
| 704 | dst += comps; |
||
| 705 | } |
||
| 706 | } |
||
| 707 | |||
| 708 | src += bs; |
||
| 709 | } |
||
| 710 | |||
| 711 | src_row += src_stride; |
||
| 712 | } |
||
| 713 | } |
||
| 714 | |||
| 715 | static void |
||
| 716 | etc2_unpack_srgb8(uint8_t *dst_row, |
||
| 717 | unsigned dst_stride, |
||
| 718 | const uint8_t *src_row, |
||
| 719 | unsigned src_stride, |
||
| 720 | unsigned width, |
||
| 721 | unsigned height) |
||
| 722 | { |
||
| 723 | const unsigned bw = 4, bh = 4, bs = 8, comps = 4; |
||
| 724 | struct etc2_block block; |
||
| 725 | unsigned x, y, i, j; |
||
| 726 | uint8_t tmp; |
||
| 727 | |||
| 728 | for (y = 0; y < height; y += bh) { |
||
| 729 | const uint8_t *src = src_row; |
||
| 730 | const unsigned h = MIN2(bh, height - y); |
||
| 731 | |||
| 732 | for (x = 0; x < width; x+= bw) { |
||
| 733 | const unsigned w = MIN2(bw, width - x); |
||
| 734 | etc2_rgb8_parse_block(&block, src, |
||
| 735 | false /* punchthrough_alpha */); |
||
| 736 | |||
| 737 | |||
| 738 | for (j = 0; j < h; j++) { |
||
| 739 | uint8_t *dst = dst_row + (y + j) * dst_stride + x * comps; |
||
| 740 | for (i = 0; i < w; i++) { |
||
| 741 | etc2_rgb8_fetch_texel(&block, i, j, dst, |
||
| 742 | false /* punchthrough_alpha */); |
||
| 743 | /* Convert to MESA_FORMAT_B8G8R8A8_SRGB */ |
||
| 744 | tmp = dst[0]; |
||
| 745 | dst[0] = dst[2]; |
||
| 746 | dst[2] = tmp; |
||
| 747 | dst[3] = 255; |
||
| 748 | |||
| 749 | dst += comps; |
||
| 750 | } |
||
| 751 | } |
||
| 752 | src += bs; |
||
| 753 | } |
||
| 754 | |||
| 755 | src_row += src_stride; |
||
| 756 | } |
||
| 757 | } |
||
| 758 | |||
| 759 | static void |
||
| 760 | etc2_unpack_rgba8(uint8_t *dst_row, |
||
| 761 | unsigned dst_stride, |
||
| 762 | const uint8_t *src_row, |
||
| 763 | unsigned src_stride, |
||
| 764 | unsigned width, |
||
| 765 | unsigned height) |
||
| 766 | { |
||
| 767 | /* If internalformat is COMPRESSED_RGBA8_ETC2_EAC, each 4 × 4 block of |
||
| 768 | * RGBA8888 information is compressed to 128 bits. To decode a block, the |
||
| 769 | * two 64-bit integers int64bitAlpha and int64bitColor are calculated. |
||
| 770 | */ |
||
| 771 | const unsigned bw = 4, bh = 4, bs = 16, comps = 4; |
||
| 772 | struct etc2_block block; |
||
| 773 | unsigned x, y, i, j; |
||
| 774 | |||
| 775 | for (y = 0; y < height; y += bh) { |
||
| 776 | const uint8_t *src = src_row; |
||
| 777 | const unsigned h = MIN2(bh, height - y); |
||
| 778 | |||
| 779 | for (x = 0; x < width; x+= bw) { |
||
| 780 | const unsigned w = MIN2(bw, width - x); |
||
| 781 | etc2_rgba8_parse_block(&block, src); |
||
| 782 | |||
| 783 | for (j = 0; j < h; j++) { |
||
| 784 | uint8_t *dst = dst_row + (y + j) * dst_stride + x * comps; |
||
| 785 | for (i = 0; i < w; i++) { |
||
| 786 | etc2_rgba8_fetch_texel(&block, i, j, dst); |
||
| 787 | dst += comps; |
||
| 788 | } |
||
| 789 | } |
||
| 790 | src += bs; |
||
| 791 | } |
||
| 792 | |||
| 793 | src_row += src_stride; |
||
| 794 | } |
||
| 795 | } |
||
| 796 | |||
| 797 | static void |
||
| 798 | etc2_unpack_srgb8_alpha8(uint8_t *dst_row, |
||
| 799 | unsigned dst_stride, |
||
| 800 | const uint8_t *src_row, |
||
| 801 | unsigned src_stride, |
||
| 802 | unsigned width, |
||
| 803 | unsigned height) |
||
| 804 | { |
||
| 805 | /* If internalformat is COMPRESSED_SRGB8_ALPHA8_ETC2_EAC, each 4 × 4 block |
||
| 806 | * of RGBA8888 information is compressed to 128 bits. To decode a block, the |
||
| 807 | * two 64-bit integers int64bitAlpha and int64bitColor are calculated. |
||
| 808 | */ |
||
| 809 | const unsigned bw = 4, bh = 4, bs = 16, comps = 4; |
||
| 810 | struct etc2_block block; |
||
| 811 | unsigned x, y, i, j; |
||
| 812 | uint8_t tmp; |
||
| 813 | |||
| 814 | for (y = 0; y < height; y += bh) { |
||
| 815 | const unsigned h = MIN2(bh, height - y); |
||
| 816 | const uint8_t *src = src_row; |
||
| 817 | |||
| 818 | for (x = 0; x < width; x+= bw) { |
||
| 819 | const unsigned w = MIN2(bw, width - x); |
||
| 820 | etc2_rgba8_parse_block(&block, src); |
||
| 821 | |||
| 822 | for (j = 0; j < h; j++) { |
||
| 823 | uint8_t *dst = dst_row + (y + j) * dst_stride + x * comps; |
||
| 824 | for (i = 0; i < w; i++) { |
||
| 825 | etc2_rgba8_fetch_texel(&block, i, j, dst); |
||
| 826 | |||
| 827 | /* Convert to MESA_FORMAT_B8G8R8A8_SRGB */ |
||
| 828 | tmp = dst[0]; |
||
| 829 | dst[0] = dst[2]; |
||
| 830 | dst[2] = tmp; |
||
| 831 | dst[3] = dst[3]; |
||
| 832 | |||
| 833 | dst += comps; |
||
| 834 | } |
||
| 835 | } |
||
| 836 | src += bs; |
||
| 837 | } |
||
| 838 | |||
| 839 | src_row += src_stride; |
||
| 840 | } |
||
| 841 | } |
||
| 842 | |||
| 843 | static void |
||
| 844 | etc2_unpack_r11(uint8_t *dst_row, |
||
| 845 | unsigned dst_stride, |
||
| 846 | const uint8_t *src_row, |
||
| 847 | unsigned src_stride, |
||
| 848 | unsigned width, |
||
| 849 | unsigned height) |
||
| 850 | { |
||
| 851 | /* If internalformat is COMPRESSED_R11_EAC, each 4 × 4 block of |
||
| 852 | color information is compressed to 64 bits. |
||
| 853 | */ |
||
| 854 | const unsigned bw = 4, bh = 4, bs = 8, comps = 1, comp_size = 2; |
||
| 855 | struct etc2_block block; |
||
| 856 | unsigned x, y, i, j; |
||
| 857 | |||
| 858 | for (y = 0; y < height; y += bh) { |
||
| 859 | const unsigned h = MIN2(bh, height - y); |
||
| 860 | const uint8_t *src = src_row; |
||
| 861 | |||
| 862 | for (x = 0; x < width; x+= bw) { |
||
| 863 | const unsigned w = MIN2(bw, width - x); |
||
| 864 | etc2_r11_parse_block(&block, src); |
||
| 865 | |||
| 866 | for (j = 0; j < h; j++) { |
||
| 867 | uint8_t *dst = dst_row + (y + j) * dst_stride + x * comps * comp_size; |
||
| 868 | for (i = 0; i < w; i++) { |
||
| 869 | etc2_r11_fetch_texel(&block, i, j, dst); |
||
| 870 | dst += comps * comp_size; |
||
| 871 | } |
||
| 872 | } |
||
| 873 | src += bs; |
||
| 874 | } |
||
| 875 | |||
| 876 | src_row += src_stride; |
||
| 877 | } |
||
| 878 | } |
||
| 879 | |||
| 880 | static void |
||
| 881 | etc2_unpack_rg11(uint8_t *dst_row, |
||
| 882 | unsigned dst_stride, |
||
| 883 | const uint8_t *src_row, |
||
| 884 | unsigned src_stride, |
||
| 885 | unsigned width, |
||
| 886 | unsigned height) |
||
| 887 | { |
||
| 888 | /* If internalformat is COMPRESSED_RG11_EAC, each 4 × 4 block of |
||
| 889 | RG color information is compressed to 128 bits. |
||
| 890 | */ |
||
| 891 | const unsigned bw = 4, bh = 4, bs = 16, comps = 2, comp_size = 2; |
||
| 892 | struct etc2_block block; |
||
| 893 | unsigned x, y, i, j; |
||
| 894 | |||
| 895 | for (y = 0; y < height; y += bh) { |
||
| 896 | const unsigned h = MIN2(bh, height - y); |
||
| 897 | const uint8_t *src = src_row; |
||
| 898 | |||
| 899 | for (x = 0; x < width; x+= bw) { |
||
| 900 | const unsigned w = MIN2(bw, width - x); |
||
| 901 | /* red component */ |
||
| 902 | etc2_r11_parse_block(&block, src); |
||
| 903 | |||
| 904 | for (j = 0; j < h; j++) { |
||
| 905 | uint8_t *dst = dst_row + (y + j) * dst_stride + |
||
| 906 | x * comps * comp_size; |
||
| 907 | for (i = 0; i < w; i++) { |
||
| 908 | etc2_r11_fetch_texel(&block, i, j, dst); |
||
| 909 | dst += comps * comp_size; |
||
| 910 | } |
||
| 911 | } |
||
| 912 | /* green component */ |
||
| 913 | etc2_r11_parse_block(&block, src + 8); |
||
| 914 | |||
| 915 | for (j = 0; j < h; j++) { |
||
| 916 | uint8_t *dst = dst_row + (y + j) * dst_stride + |
||
| 917 | x * comps * comp_size; |
||
| 918 | for (i = 0; i < w; i++) { |
||
| 919 | etc2_r11_fetch_texel(&block, i, j, dst + comp_size); |
||
| 920 | dst += comps * comp_size; |
||
| 921 | } |
||
| 922 | } |
||
| 923 | src += bs; |
||
| 924 | } |
||
| 925 | |||
| 926 | src_row += src_stride; |
||
| 927 | } |
||
| 928 | } |
||
| 929 | |||
| 930 | static void |
||
| 931 | etc2_unpack_signed_r11(uint8_t *dst_row, |
||
| 932 | unsigned dst_stride, |
||
| 933 | const uint8_t *src_row, |
||
| 934 | unsigned src_stride, |
||
| 935 | unsigned width, |
||
| 936 | unsigned height) |
||
| 937 | { |
||
| 938 | /* If internalformat is COMPRESSED_SIGNED_R11_EAC, each 4 × 4 block of |
||
| 939 | red color information is compressed to 64 bits. |
||
| 940 | */ |
||
| 941 | const unsigned bw = 4, bh = 4, bs = 8, comps = 1, comp_size = 2; |
||
| 942 | struct etc2_block block; |
||
| 943 | unsigned x, y, i, j; |
||
| 944 | |||
| 945 | for (y = 0; y < height; y += bh) { |
||
| 946 | const unsigned h = MIN2(bh, height - y); |
||
| 947 | const uint8_t *src = src_row; |
||
| 948 | |||
| 949 | for (x = 0; x < width; x+= bw) { |
||
| 950 | const unsigned w = MIN2(bw, width - x); |
||
| 951 | etc2_r11_parse_block(&block, src); |
||
| 952 | |||
| 953 | for (j = 0; j < h; j++) { |
||
| 954 | uint8_t *dst = dst_row + (y + j) * dst_stride + |
||
| 955 | x * comps * comp_size; |
||
| 956 | for (i = 0; i < w; i++) { |
||
| 957 | etc2_signed_r11_fetch_texel(&block, i, j, dst); |
||
| 958 | dst += comps * comp_size; |
||
| 959 | } |
||
| 960 | } |
||
| 961 | src += bs; |
||
| 962 | } |
||
| 963 | |||
| 964 | src_row += src_stride; |
||
| 965 | } |
||
| 966 | } |
||
| 967 | |||
| 968 | static void |
||
| 969 | etc2_unpack_signed_rg11(uint8_t *dst_row, |
||
| 970 | unsigned dst_stride, |
||
| 971 | const uint8_t *src_row, |
||
| 972 | unsigned src_stride, |
||
| 973 | unsigned width, |
||
| 974 | unsigned height) |
||
| 975 | { |
||
| 976 | /* If internalformat is COMPRESSED_SIGNED_RG11_EAC, each 4 × 4 block of |
||
| 977 | RG color information is compressed to 128 bits. |
||
| 978 | */ |
||
| 979 | const unsigned bw = 4, bh = 4, bs = 16, comps = 2, comp_size = 2; |
||
| 980 | struct etc2_block block; |
||
| 981 | unsigned x, y, i, j; |
||
| 982 | |||
| 983 | for (y = 0; y < height; y += bh) { |
||
| 984 | const unsigned h = MIN2(bh, height - y); |
||
| 985 | const uint8_t *src = src_row; |
||
| 986 | |||
| 987 | for (x = 0; x < width; x+= bw) { |
||
| 988 | const unsigned w = MIN2(bw, width - x); |
||
| 989 | /* red component */ |
||
| 990 | etc2_r11_parse_block(&block, src); |
||
| 991 | |||
| 992 | for (j = 0; j < h; j++) { |
||
| 993 | uint8_t *dst = dst_row + (y + j) * dst_stride + |
||
| 994 | x * comps * comp_size; |
||
| 995 | for (i = 0; i < w; i++) { |
||
| 996 | etc2_signed_r11_fetch_texel(&block, i, j, dst); |
||
| 997 | dst += comps * comp_size; |
||
| 998 | } |
||
| 999 | } |
||
| 1000 | /* green component */ |
||
| 1001 | etc2_r11_parse_block(&block, src + 8); |
||
| 1002 | |||
| 1003 | for (j = 0; j < h; j++) { |
||
| 1004 | uint8_t *dst = dst_row + (y + j) * dst_stride + |
||
| 1005 | x * comps * comp_size; |
||
| 1006 | for (i = 0; i < w; i++) { |
||
| 1007 | etc2_signed_r11_fetch_texel(&block, i, j, dst + comp_size); |
||
| 1008 | dst += comps * comp_size; |
||
| 1009 | } |
||
| 1010 | } |
||
| 1011 | src += bs; |
||
| 1012 | } |
||
| 1013 | |||
| 1014 | src_row += src_stride; |
||
| 1015 | } |
||
| 1016 | } |
||
| 1017 | |||
| 1018 | static void |
||
| 1019 | etc2_unpack_rgb8_punchthrough_alpha1(uint8_t *dst_row, |
||
| 1020 | unsigned dst_stride, |
||
| 1021 | const uint8_t *src_row, |
||
| 1022 | unsigned src_stride, |
||
| 1023 | unsigned width, |
||
| 1024 | unsigned height) |
||
| 1025 | { |
||
| 1026 | const unsigned bw = 4, bh = 4, bs = 8, comps = 4; |
||
| 1027 | struct etc2_block block; |
||
| 1028 | unsigned x, y, i, j; |
||
| 1029 | |||
| 1030 | for (y = 0; y < height; y += bh) { |
||
| 1031 | const unsigned h = MIN2(bh, height - y); |
||
| 1032 | const uint8_t *src = src_row; |
||
| 1033 | |||
| 1034 | for (x = 0; x < width; x+= bw) { |
||
| 1035 | const unsigned w = MIN2(bw, width - x); |
||
| 1036 | etc2_rgb8_parse_block(&block, src, |
||
| 1037 | true /* punchthrough_alpha */); |
||
| 1038 | for (j = 0; j < h; j++) { |
||
| 1039 | uint8_t *dst = dst_row + (y + j) * dst_stride + x * comps; |
||
| 1040 | for (i = 0; i < w; i++) { |
||
| 1041 | etc2_rgb8_fetch_texel(&block, i, j, dst, |
||
| 1042 | true /* punchthrough_alpha */); |
||
| 1043 | dst += comps; |
||
| 1044 | } |
||
| 1045 | } |
||
| 1046 | |||
| 1047 | src += bs; |
||
| 1048 | } |
||
| 1049 | |||
| 1050 | src_row += src_stride; |
||
| 1051 | } |
||
| 1052 | } |
||
| 1053 | |||
| 1054 | static void |
||
| 1055 | etc2_unpack_srgb8_punchthrough_alpha1(uint8_t *dst_row, |
||
| 1056 | unsigned dst_stride, |
||
| 1057 | const uint8_t *src_row, |
||
| 1058 | unsigned src_stride, |
||
| 1059 | unsigned width, |
||
| 1060 | unsigned height) |
||
| 1061 | { |
||
| 1062 | const unsigned bw = 4, bh = 4, bs = 8, comps = 4; |
||
| 1063 | struct etc2_block block; |
||
| 1064 | unsigned x, y, i, j; |
||
| 1065 | uint8_t tmp; |
||
| 1066 | |||
| 1067 | for (y = 0; y < height; y += bh) { |
||
| 1068 | const unsigned h = MIN2(bh, height - y); |
||
| 1069 | const uint8_t *src = src_row; |
||
| 1070 | |||
| 1071 | for (x = 0; x < width; x+= bw) { |
||
| 1072 | const unsigned w = MIN2(bw, width - x); |
||
| 1073 | etc2_rgb8_parse_block(&block, src, |
||
| 1074 | true /* punchthrough_alpha */); |
||
| 1075 | for (j = 0; j < h; j++) { |
||
| 1076 | uint8_t *dst = dst_row + (y + j) * dst_stride + x * comps; |
||
| 1077 | for (i = 0; i < w; i++) { |
||
| 1078 | etc2_rgb8_fetch_texel(&block, i, j, dst, |
||
| 1079 | true /* punchthrough_alpha */); |
||
| 1080 | /* Convert to MESA_FORMAT_B8G8R8A8_SRGB */ |
||
| 1081 | tmp = dst[0]; |
||
| 1082 | dst[0] = dst[2]; |
||
| 1083 | dst[2] = tmp; |
||
| 1084 | dst[3] = dst[3]; |
||
| 1085 | |||
| 1086 | dst += comps; |
||
| 1087 | } |
||
| 1088 | } |
||
| 1089 | |||
| 1090 | src += bs; |
||
| 1091 | } |
||
| 1092 | |||
| 1093 | src_row += src_stride; |
||
| 1094 | } |
||
| 1095 | } |
||
| 1096 | |||
| 1097 | /* ETC2 texture formats are valid in glCompressedTexImage2D and |
||
| 1098 | * glCompressedTexSubImage2D functions */ |
||
| 1099 | GLboolean |
||
| 1100 | _mesa_texstore_etc2_rgb8(TEXSTORE_PARAMS) |
||
| 1101 | { |
||
| 1102 | assert(0); |
||
| 1103 | |||
| 1104 | return GL_FALSE; |
||
| 1105 | } |
||
| 1106 | |||
| 1107 | GLboolean |
||
| 1108 | _mesa_texstore_etc2_srgb8(TEXSTORE_PARAMS) |
||
| 1109 | { |
||
| 1110 | assert(0); |
||
| 1111 | |||
| 1112 | return GL_FALSE; |
||
| 1113 | } |
||
| 1114 | |||
| 1115 | GLboolean |
||
| 1116 | _mesa_texstore_etc2_rgba8_eac(TEXSTORE_PARAMS) |
||
| 1117 | { |
||
| 1118 | assert(0); |
||
| 1119 | |||
| 1120 | return GL_FALSE; |
||
| 1121 | } |
||
| 1122 | |||
| 1123 | GLboolean |
||
| 1124 | _mesa_texstore_etc2_srgb8_alpha8_eac(TEXSTORE_PARAMS) |
||
| 1125 | { |
||
| 1126 | assert(0); |
||
| 1127 | |||
| 1128 | return GL_FALSE; |
||
| 1129 | } |
||
| 1130 | |||
| 1131 | GLboolean |
||
| 1132 | _mesa_texstore_etc2_r11_eac(TEXSTORE_PARAMS) |
||
| 1133 | { |
||
| 1134 | assert(0); |
||
| 1135 | |||
| 1136 | return GL_FALSE; |
||
| 1137 | } |
||
| 1138 | |||
| 1139 | GLboolean |
||
| 1140 | _mesa_texstore_etc2_signed_r11_eac(TEXSTORE_PARAMS) |
||
| 1141 | { |
||
| 1142 | assert(0); |
||
| 1143 | |||
| 1144 | return GL_FALSE; |
||
| 1145 | } |
||
| 1146 | |||
| 1147 | GLboolean |
||
| 1148 | _mesa_texstore_etc2_rg11_eac(TEXSTORE_PARAMS) |
||
| 1149 | { |
||
| 1150 | assert(0); |
||
| 1151 | |||
| 1152 | return GL_FALSE; |
||
| 1153 | } |
||
| 1154 | |||
| 1155 | GLboolean |
||
| 1156 | _mesa_texstore_etc2_signed_rg11_eac(TEXSTORE_PARAMS) |
||
| 1157 | { |
||
| 1158 | assert(0); |
||
| 1159 | |||
| 1160 | return GL_FALSE; |
||
| 1161 | } |
||
| 1162 | |||
| 1163 | GLboolean |
||
| 1164 | _mesa_texstore_etc2_rgb8_punchthrough_alpha1(TEXSTORE_PARAMS) |
||
| 1165 | { |
||
| 1166 | assert(0); |
||
| 1167 | |||
| 1168 | return GL_FALSE; |
||
| 1169 | } |
||
| 1170 | |||
| 1171 | GLboolean |
||
| 1172 | _mesa_texstore_etc2_srgb8_punchthrough_alpha1(TEXSTORE_PARAMS) |
||
| 1173 | { |
||
| 1174 | assert(0); |
||
| 1175 | |||
| 1176 | return GL_FALSE; |
||
| 1177 | } |
||
| 1178 | |||
| 1179 | |||
| 1180 | /** |
||
| 1181 | * Decode texture data in any one of following formats: |
||
| 1182 | * `MESA_FORMAT_ETC2_RGB8` |
||
| 1183 | * `MESA_FORMAT_ETC2_SRGB8` |
||
| 1184 | * `MESA_FORMAT_ETC2_RGBA8_EAC` |
||
| 1185 | * `MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC` |
||
| 1186 | * `MESA_FORMAT_ETC2_R11_EAC` |
||
| 1187 | * `MESA_FORMAT_ETC2_RG11_EAC` |
||
| 1188 | * `MESA_FORMAT_ETC2_SIGNED_R11_EAC` |
||
| 1189 | * `MESA_FORMAT_ETC2_SIGNED_RG11_EAC` |
||
| 1190 | * `MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1` |
||
| 1191 | * `MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1` |
||
| 1192 | * |
||
| 1193 | * The size of the source data must be a multiple of the ETC2 block size |
||
| 1194 | * even if the texture image's dimensions are not aligned to 4. |
||
| 1195 | * |
||
| 1196 | * \param src_width in pixels |
||
| 1197 | * \param src_height in pixels |
||
| 1198 | * \param dst_stride in bytes |
||
| 1199 | */ |
||
| 1200 | |||
| 1201 | void |
||
| 1202 | _mesa_unpack_etc2_format(uint8_t *dst_row, |
||
| 1203 | unsigned dst_stride, |
||
| 1204 | const uint8_t *src_row, |
||
| 1205 | unsigned src_stride, |
||
| 1206 | unsigned src_width, |
||
| 1207 | unsigned src_height, |
||
| 1208 | mesa_format format) |
||
| 1209 | { |
||
| 1210 | if (format == MESA_FORMAT_ETC2_RGB8) |
||
| 1211 | etc2_unpack_rgb8(dst_row, dst_stride, |
||
| 1212 | src_row, src_stride, |
||
| 1213 | src_width, src_height); |
||
| 1214 | else if (format == MESA_FORMAT_ETC2_SRGB8) |
||
| 1215 | etc2_unpack_srgb8(dst_row, dst_stride, |
||
| 1216 | src_row, src_stride, |
||
| 1217 | src_width, src_height); |
||
| 1218 | else if (format == MESA_FORMAT_ETC2_RGBA8_EAC) |
||
| 1219 | etc2_unpack_rgba8(dst_row, dst_stride, |
||
| 1220 | src_row, src_stride, |
||
| 1221 | src_width, src_height); |
||
| 1222 | else if (format == MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC) |
||
| 1223 | etc2_unpack_srgb8_alpha8(dst_row, dst_stride, |
||
| 1224 | src_row, src_stride, |
||
| 1225 | src_width, src_height); |
||
| 1226 | else if (format == MESA_FORMAT_ETC2_R11_EAC) |
||
| 1227 | etc2_unpack_r11(dst_row, dst_stride, |
||
| 1228 | src_row, src_stride, |
||
| 1229 | src_width, src_height); |
||
| 1230 | else if (format == MESA_FORMAT_ETC2_RG11_EAC) |
||
| 1231 | etc2_unpack_rg11(dst_row, dst_stride, |
||
| 1232 | src_row, src_stride, |
||
| 1233 | src_width, src_height); |
||
| 1234 | else if (format == MESA_FORMAT_ETC2_SIGNED_R11_EAC) |
||
| 1235 | etc2_unpack_signed_r11(dst_row, dst_stride, |
||
| 1236 | src_row, src_stride, |
||
| 1237 | src_width, src_height); |
||
| 1238 | else if (format == MESA_FORMAT_ETC2_SIGNED_RG11_EAC) |
||
| 1239 | etc2_unpack_signed_rg11(dst_row, dst_stride, |
||
| 1240 | src_row, src_stride, |
||
| 1241 | src_width, src_height); |
||
| 1242 | else if (format == MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1) |
||
| 1243 | etc2_unpack_rgb8_punchthrough_alpha1(dst_row, dst_stride, |
||
| 1244 | src_row, src_stride, |
||
| 1245 | src_width, src_height); |
||
| 1246 | else if (format == MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1) |
||
| 1247 | etc2_unpack_srgb8_punchthrough_alpha1(dst_row, dst_stride, |
||
| 1248 | src_row, src_stride, |
||
| 1249 | src_width, src_height); |
||
| 1250 | } |
||
| 1251 | |||
| 1252 | |||
| 1253 | |||
| 1254 | static void |
||
| 1255 | fetch_etc1_rgb8(const GLubyte *map, |
||
| 1256 | GLint rowStride, GLint i, GLint j, |
||
| 1257 | GLfloat *texel) |
||
| 1258 | { |
||
| 1259 | struct etc1_block block; |
||
| 1260 | GLubyte dst[3]; |
||
| 1261 | const GLubyte *src; |
||
| 1262 | |||
| 1263 | src = map + (((rowStride + 3) / 4) * (j / 4) + (i / 4)) * 8; |
||
| 1264 | |||
| 1265 | etc1_parse_block(&block, src); |
||
| 1266 | etc1_fetch_texel(&block, i % 4, j % 4, dst); |
||
| 1267 | |||
| 1268 | texel[RCOMP] = UBYTE_TO_FLOAT(dst[0]); |
||
| 1269 | texel[GCOMP] = UBYTE_TO_FLOAT(dst[1]); |
||
| 1270 | texel[BCOMP] = UBYTE_TO_FLOAT(dst[2]); |
||
| 1271 | texel[ACOMP] = 1.0f; |
||
| 1272 | } |
||
| 1273 | |||
| 1274 | |||
| 1275 | static void |
||
| 1276 | fetch_etc2_rgb8(const GLubyte *map, |
||
| 1277 | GLint rowStride, GLint i, GLint j, GLfloat *texel) |
||
| 1278 | { |
||
| 1279 | struct etc2_block block; |
||
| 1280 | uint8_t dst[3]; |
||
| 1281 | const uint8_t *src; |
||
| 1282 | |||
| 1283 | src = map + (((rowStride + 3) / 4) * (j / 4) + (i / 4)) * 8; |
||
| 1284 | |||
| 1285 | etc2_rgb8_parse_block(&block, src, |
||
| 1286 | false /* punchthrough_alpha */); |
||
| 1287 | etc2_rgb8_fetch_texel(&block, i % 4, j % 4, dst, |
||
| 1288 | false /* punchthrough_alpha */); |
||
| 1289 | |||
| 1290 | texel[RCOMP] = UBYTE_TO_FLOAT(dst[0]); |
||
| 1291 | texel[GCOMP] = UBYTE_TO_FLOAT(dst[1]); |
||
| 1292 | texel[BCOMP] = UBYTE_TO_FLOAT(dst[2]); |
||
| 1293 | texel[ACOMP] = 1.0f; |
||
| 1294 | } |
||
| 1295 | |||
| 1296 | static void |
||
| 1297 | fetch_etc2_srgb8(const GLubyte *map, |
||
| 1298 | GLint rowStride, GLint i, GLint j, GLfloat *texel) |
||
| 1299 | { |
||
| 1300 | struct etc2_block block; |
||
| 1301 | uint8_t dst[3]; |
||
| 1302 | const uint8_t *src; |
||
| 1303 | |||
| 1304 | src = map + (((rowStride + 3) / 4) * (j / 4) + (i / 4)) * 8; |
||
| 1305 | |||
| 1306 | etc2_rgb8_parse_block(&block, src, |
||
| 1307 | false /* punchthrough_alpha */); |
||
| 1308 | etc2_rgb8_fetch_texel(&block, i % 4, j % 4, dst, |
||
| 1309 | false /* punchthrough_alpha */); |
||
| 1310 | |||
| 1311 | texel[RCOMP] = util_format_srgb_8unorm_to_linear_float(dst[0]); |
||
| 1312 | texel[GCOMP] = util_format_srgb_8unorm_to_linear_float(dst[1]); |
||
| 1313 | texel[BCOMP] = util_format_srgb_8unorm_to_linear_float(dst[2]); |
||
| 1314 | texel[ACOMP] = 1.0f; |
||
| 1315 | } |
||
| 1316 | |||
| 1317 | static void |
||
| 1318 | fetch_etc2_rgba8_eac(const GLubyte *map, |
||
| 1319 | GLint rowStride, GLint i, GLint j, GLfloat *texel) |
||
| 1320 | { |
||
| 1321 | struct etc2_block block; |
||
| 1322 | uint8_t dst[4]; |
||
| 1323 | const uint8_t *src; |
||
| 1324 | |||
| 1325 | src = map + (((rowStride + 3) / 4) * (j / 4) + (i / 4)) * 16; |
||
| 1326 | |||
| 1327 | etc2_rgba8_parse_block(&block, src); |
||
| 1328 | etc2_rgba8_fetch_texel(&block, i % 4, j % 4, dst); |
||
| 1329 | |||
| 1330 | texel[RCOMP] = UBYTE_TO_FLOAT(dst[0]); |
||
| 1331 | texel[GCOMP] = UBYTE_TO_FLOAT(dst[1]); |
||
| 1332 | texel[BCOMP] = UBYTE_TO_FLOAT(dst[2]); |
||
| 1333 | texel[ACOMP] = UBYTE_TO_FLOAT(dst[3]); |
||
| 1334 | } |
||
| 1335 | |||
| 1336 | static void |
||
| 1337 | fetch_etc2_srgb8_alpha8_eac(const GLubyte *map, |
||
| 1338 | GLint rowStride, GLint i, GLint j, GLfloat *texel) |
||
| 1339 | { |
||
| 1340 | struct etc2_block block; |
||
| 1341 | uint8_t dst[4]; |
||
| 1342 | const uint8_t *src; |
||
| 1343 | |||
| 1344 | src = map + (((rowStride + 3) / 4) * (j / 4) + (i / 4)) * 16; |
||
| 1345 | |||
| 1346 | etc2_rgba8_parse_block(&block, src); |
||
| 1347 | etc2_rgba8_fetch_texel(&block, i % 4, j % 4, dst); |
||
| 1348 | |||
| 1349 | texel[RCOMP] = util_format_srgb_8unorm_to_linear_float(dst[0]); |
||
| 1350 | texel[GCOMP] = util_format_srgb_8unorm_to_linear_float(dst[1]); |
||
| 1351 | texel[BCOMP] = util_format_srgb_8unorm_to_linear_float(dst[2]); |
||
| 1352 | texel[ACOMP] = UBYTE_TO_FLOAT(dst[3]); |
||
| 1353 | } |
||
| 1354 | |||
| 1355 | static void |
||
| 1356 | fetch_etc2_r11_eac(const GLubyte *map, |
||
| 1357 | GLint rowStride, GLint i, GLint j, GLfloat *texel) |
||
| 1358 | { |
||
| 1359 | struct etc2_block block; |
||
| 1360 | GLushort dst; |
||
| 1361 | const uint8_t *src; |
||
| 1362 | |||
| 1363 | src = map + (((rowStride + 3) / 4) * (j / 4) + (i / 4)) * 8; |
||
| 1364 | |||
| 1365 | etc2_r11_parse_block(&block, src); |
||
| 1366 | etc2_r11_fetch_texel(&block, i % 4, j % 4, (uint8_t *)&dst); |
||
| 1367 | |||
| 1368 | texel[RCOMP] = USHORT_TO_FLOAT(dst); |
||
| 1369 | texel[GCOMP] = 0.0f; |
||
| 1370 | texel[BCOMP] = 0.0f; |
||
| 1371 | texel[ACOMP] = 1.0f; |
||
| 1372 | } |
||
| 1373 | |||
| 1374 | static void |
||
| 1375 | fetch_etc2_rg11_eac(const GLubyte *map, |
||
| 1376 | GLint rowStride, GLint i, GLint j, GLfloat *texel) |
||
| 1377 | { |
||
| 1378 | struct etc2_block block; |
||
| 1379 | GLushort dst[2]; |
||
| 1380 | const uint8_t *src; |
||
| 1381 | |||
| 1382 | src = map + (((rowStride + 3) / 4) * (j / 4) + (i / 4)) * 16; |
||
| 1383 | |||
| 1384 | /* red component */ |
||
| 1385 | etc2_r11_parse_block(&block, src); |
||
| 1386 | etc2_r11_fetch_texel(&block, i % 4, j % 4, (uint8_t *)dst); |
||
| 1387 | |||
| 1388 | /* green component */ |
||
| 1389 | etc2_r11_parse_block(&block, src + 8); |
||
| 1390 | etc2_r11_fetch_texel(&block, i % 4, j % 4, (uint8_t *)(dst + 1)); |
||
| 1391 | |||
| 1392 | texel[RCOMP] = USHORT_TO_FLOAT(dst[0]); |
||
| 1393 | texel[GCOMP] = USHORT_TO_FLOAT(dst[1]); |
||
| 1394 | texel[BCOMP] = 0.0f; |
||
| 1395 | texel[ACOMP] = 1.0f; |
||
| 1396 | } |
||
| 1397 | |||
| 1398 | static void |
||
| 1399 | fetch_etc2_signed_r11_eac(const GLubyte *map, |
||
| 1400 | GLint rowStride, GLint i, GLint j, GLfloat *texel) |
||
| 1401 | { |
||
| 1402 | struct etc2_block block; |
||
| 1403 | GLushort dst; |
||
| 1404 | const uint8_t *src; |
||
| 1405 | |||
| 1406 | src = map + (((rowStride + 3) / 4) * (j / 4) + (i / 4)) * 8; |
||
| 1407 | |||
| 1408 | etc2_r11_parse_block(&block, src); |
||
| 1409 | etc2_signed_r11_fetch_texel(&block, i % 4, j % 4, (uint8_t *)&dst); |
||
| 1410 | |||
| 1411 | texel[RCOMP] = SHORT_TO_FLOAT(dst); |
||
| 1412 | texel[GCOMP] = 0.0f; |
||
| 1413 | texel[BCOMP] = 0.0f; |
||
| 1414 | texel[ACOMP] = 1.0f; |
||
| 1415 | } |
||
| 1416 | |||
| 1417 | static void |
||
| 1418 | fetch_etc2_signed_rg11_eac(const GLubyte *map, |
||
| 1419 | GLint rowStride, GLint i, GLint j, GLfloat *texel) |
||
| 1420 | { |
||
| 1421 | struct etc2_block block; |
||
| 1422 | GLushort dst[2]; |
||
| 1423 | const uint8_t *src; |
||
| 1424 | |||
| 1425 | src = map + (((rowStride + 3) / 4) * (j / 4) + (i / 4)) * 16; |
||
| 1426 | |||
| 1427 | /* red component */ |
||
| 1428 | etc2_r11_parse_block(&block, src); |
||
| 1429 | etc2_signed_r11_fetch_texel(&block, i % 4, j % 4, (uint8_t *)dst); |
||
| 1430 | |||
| 1431 | /* green component */ |
||
| 1432 | etc2_r11_parse_block(&block, src + 8); |
||
| 1433 | etc2_signed_r11_fetch_texel(&block, i % 4, j % 4, (uint8_t *)(dst + 1)); |
||
| 1434 | |||
| 1435 | texel[RCOMP] = SHORT_TO_FLOAT(dst[0]); |
||
| 1436 | texel[GCOMP] = SHORT_TO_FLOAT(dst[1]); |
||
| 1437 | texel[BCOMP] = 0.0f; |
||
| 1438 | texel[ACOMP] = 1.0f; |
||
| 1439 | } |
||
| 1440 | |||
| 1441 | static void |
||
| 1442 | fetch_etc2_rgb8_punchthrough_alpha1(const GLubyte *map, |
||
| 1443 | GLint rowStride, GLint i, GLint j, |
||
| 1444 | GLfloat *texel) |
||
| 1445 | { |
||
| 1446 | struct etc2_block block; |
||
| 1447 | uint8_t dst[4]; |
||
| 1448 | const uint8_t *src; |
||
| 1449 | |||
| 1450 | src = map + (((rowStride + 3) / 4) * (j / 4) + (i / 4)) * 8; |
||
| 1451 | |||
| 1452 | etc2_rgb8_parse_block(&block, src, |
||
| 1453 | true /* punchthrough alpha */); |
||
| 1454 | etc2_rgb8_fetch_texel(&block, i % 4, j % 4, dst, |
||
| 1455 | true /* punchthrough alpha */); |
||
| 1456 | texel[RCOMP] = UBYTE_TO_FLOAT(dst[0]); |
||
| 1457 | texel[GCOMP] = UBYTE_TO_FLOAT(dst[1]); |
||
| 1458 | texel[BCOMP] = UBYTE_TO_FLOAT(dst[2]); |
||
| 1459 | texel[ACOMP] = UBYTE_TO_FLOAT(dst[3]); |
||
| 1460 | } |
||
| 1461 | |||
| 1462 | static void |
||
| 1463 | fetch_etc2_srgb8_punchthrough_alpha1(const GLubyte *map, |
||
| 1464 | GLint rowStride, |
||
| 1465 | GLint i, GLint j, GLfloat *texel) |
||
| 1466 | { |
||
| 1467 | struct etc2_block block; |
||
| 1468 | uint8_t dst[4]; |
||
| 1469 | const uint8_t *src; |
||
| 1470 | |||
| 1471 | src = map + (((rowStride + 3) / 4) * (j / 4) + (i / 4)) * 8; |
||
| 1472 | |||
| 1473 | etc2_rgb8_parse_block(&block, src, |
||
| 1474 | true /* punchthrough alpha */); |
||
| 1475 | etc2_rgb8_fetch_texel(&block, i % 4, j % 4, dst, |
||
| 1476 | true /* punchthrough alpha */); |
||
| 1477 | texel[RCOMP] = util_format_srgb_8unorm_to_linear_float(dst[0]); |
||
| 1478 | texel[GCOMP] = util_format_srgb_8unorm_to_linear_float(dst[1]); |
||
| 1479 | texel[BCOMP] = util_format_srgb_8unorm_to_linear_float(dst[2]); |
||
| 1480 | texel[ACOMP] = UBYTE_TO_FLOAT(dst[3]); |
||
| 1481 | } |
||
| 1482 | |||
| 1483 | |||
| 1484 | compressed_fetch_func |
||
| 1485 | _mesa_get_etc_fetch_func(mesa_format format) |
||
| 1486 | { |
||
| 1487 | switch (format) { |
||
| 1488 | case MESA_FORMAT_ETC1_RGB8: |
||
| 1489 | return fetch_etc1_rgb8; |
||
| 1490 | case MESA_FORMAT_ETC2_RGB8: |
||
| 1491 | return fetch_etc2_rgb8; |
||
| 1492 | case MESA_FORMAT_ETC2_SRGB8: |
||
| 1493 | return fetch_etc2_srgb8; |
||
| 1494 | case MESA_FORMAT_ETC2_RGBA8_EAC: |
||
| 1495 | return fetch_etc2_rgba8_eac; |
||
| 1496 | case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC: |
||
| 1497 | return fetch_etc2_srgb8_alpha8_eac; |
||
| 1498 | case MESA_FORMAT_ETC2_R11_EAC: |
||
| 1499 | return fetch_etc2_r11_eac; |
||
| 1500 | case MESA_FORMAT_ETC2_RG11_EAC: |
||
| 1501 | return fetch_etc2_rg11_eac; |
||
| 1502 | case MESA_FORMAT_ETC2_SIGNED_R11_EAC: |
||
| 1503 | return fetch_etc2_signed_r11_eac; |
||
| 1504 | case MESA_FORMAT_ETC2_SIGNED_RG11_EAC: |
||
| 1505 | return fetch_etc2_signed_rg11_eac; |
||
| 1506 | case MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1: |
||
| 1507 | return fetch_etc2_rgb8_punchthrough_alpha1; |
||
| 1508 | case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1: |
||
| 1509 | return fetch_etc2_srgb8_punchthrough_alpha1; |
||
| 1510 | default: |
||
| 1511 | return NULL; |
||
| 1512 | } |
||
| 1513 | } |