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/* |
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* Texture block decompression |
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* Copyright (C) 2009 Benjamin Dobell, Glass Echidna |
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* Copyright (C) 2012 Matthäus G. "Anteru" Chajdas (http://anteru.net) |
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* Copyright (C) 2015 Vittorio Giovara <vittorio.giovara@gmail.com> |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a |
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* copy of this software and associated documentation files (the "Software"), |
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* to deal in the Software without restriction, including without limitation |
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* the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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* and/or sell copies of the Software, and to permit persons to whom the |
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* Software is furnished to do so, subject to the following conditions: |
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* The above copyright notice and this permission notice shall be included |
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* in all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
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* IN THE SOFTWARE. |
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*/ |
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#include <stddef.h> |
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#include <stdint.h> |
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#include "libavutil/attributes.h" |
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#include "libavutil/common.h" |
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#include "libavutil/intreadwrite.h" |
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#include "libavutil/libm.h" |
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#include "texturedsp.h" |
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#define RGBA(r, g, b, a) (((uint8_t)(r) << 0) | \ |
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((uint8_t)(g) << 8) | \ |
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((uint8_t)(b) << 16) | \ |
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((unsigned)(uint8_t)(a) << 24)) |
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1131646 |
static av_always_inline void extract_color(uint32_t colors[4], |
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uint16_t color0, |
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uint16_t color1, |
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int dxtn, int alpha) |
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{ |
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int tmp; |
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uint8_t r0, g0, b0, r1, g1, b1; |
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✓✓ |
1131646 |
uint8_t a = dxtn ? 0 : 255; |
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1131646 |
tmp = (color0 >> 11) * 255 + 16; |
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1131646 |
r0 = (uint8_t) ((tmp / 32 + tmp) / 32); |
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1131646 |
tmp = ((color0 & 0x07E0) >> 5) * 255 + 32; |
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1131646 |
g0 = (uint8_t) ((tmp / 64 + tmp) / 64); |
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1131646 |
tmp = (color0 & 0x001F) * 255 + 16; |
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1131646 |
b0 = (uint8_t) ((tmp / 32 + tmp) / 32); |
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1131646 |
tmp = (color1 >> 11) * 255 + 16; |
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1131646 |
r1 = (uint8_t) ((tmp / 32 + tmp) / 32); |
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1131646 |
tmp = ((color1 & 0x07E0) >> 5) * 255 + 32; |
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1131646 |
g1 = (uint8_t) ((tmp / 64 + tmp) / 64); |
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1131646 |
tmp = (color1 & 0x001F) * 255 + 16; |
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1131646 |
b1 = (uint8_t) ((tmp / 32 + tmp) / 32); |
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✓✓✓✓
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1131646 |
if (dxtn || color0 > color1) { |
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984784 |
colors[0] = RGBA(r0, g0, b0, a); |
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984784 |
colors[1] = RGBA(r1, g1, b1, a); |
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984784 |
colors[2] = RGBA((2 * r0 + r1) / 3, |
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(2 * g0 + g1) / 3, |
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(2 * b0 + b1) / 3, |
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a); |
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984784 |
colors[3] = RGBA((2 * r1 + r0) / 3, |
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(2 * g1 + g0) / 3, |
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(2 * b1 + b0) / 3, |
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a); |
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} else { |
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colors[0] = RGBA(r0, g0, b0, a); |
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colors[1] = RGBA(r1, g1, b1, a); |
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colors[2] = RGBA((r0 + r1) / 2, |
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(g0 + g1) / 2, |
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(b0 + b1) / 2, |
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a); |
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146862 |
colors[3] = RGBA(0, 0, 0, alpha); |
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} |
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1131646 |
} |
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547584 |
static inline void dxt1_block_internal(uint8_t *dst, ptrdiff_t stride, |
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const uint8_t *block, uint8_t alpha) |
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{ |
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int x, y; |
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uint32_t colors[4]; |
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547584 |
uint16_t color0 = AV_RL16(block + 0); |
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uint16_t color1 = AV_RL16(block + 2); |
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547584 |
uint32_t code = AV_RL32(block + 4); |
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547584 |
extract_color(colors, color0, color1, 0, alpha); |
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✓✓ |
2737920 |
for (y = 0; y < 4; y++) { |
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✓✓ |
10951680 |
for (x = 0; x < 4; x++) { |
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8761344 |
uint32_t pixel = colors[code & 3]; |
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8761344 |
code >>= 2; |
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8761344 |
AV_WL32(dst + x * 4, pixel); |
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} |
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2190336 |
dst += stride; |
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} |
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} |
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/** |
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* Decompress one block of a DXT1 texture and store the resulting |
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* RGBA pixels in 'dst'. Alpha component is fully opaque. |
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* |
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* @param dst output buffer. |
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* @param stride scanline in bytes. |
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* @param block block to decompress. |
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* @return how much texture data has been consumed. |
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*/ |
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544512 |
static int dxt1_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block) |
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{ |
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544512 |
dxt1_block_internal(dst, stride, block, 255); |
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544512 |
return 8; |
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} |
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/** |
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* Decompress one block of a DXT1 with 1-bit alpha texture and store |
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* the resulting RGBA pixels in 'dst'. Alpha is either fully opaque or |
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* fully transparent. |
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* |
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* @param dst output buffer. |
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* @param stride scanline in bytes. |
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* @param block block to decompress. |
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* @return how much texture data has been consumed. |
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*/ |
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3072 |
static int dxt1a_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block) |
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{ |
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dxt1_block_internal(dst, stride, block, 0); |
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3072 |
return 8; |
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} |
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13758 |
static inline void dxt3_block_internal(uint8_t *dst, ptrdiff_t stride, |
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const uint8_t *block) |
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{ |
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int x, y; |
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uint32_t colors[4]; |
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13758 |
uint16_t color0 = AV_RL16(block + 8); |
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13758 |
uint16_t color1 = AV_RL16(block + 10); |
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13758 |
uint32_t code = AV_RL32(block + 12); |
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13758 |
extract_color(colors, color0, color1, 1, 0); |
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✓✓ |
68790 |
for (y = 0; y < 4; y++) { |
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55032 |
const uint16_t alpha_code = AV_RL16(block + 2 * y); |
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uint8_t alpha_values[4]; |
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alpha_values[0] = ((alpha_code >> 0) & 0x0F) * 17; |
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alpha_values[1] = ((alpha_code >> 4) & 0x0F) * 17; |
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alpha_values[2] = ((alpha_code >> 8) & 0x0F) * 17; |
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55032 |
alpha_values[3] = ((alpha_code >> 12) & 0x0F) * 17; |
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✓✓ |
275160 |
for (x = 0; x < 4; x++) { |
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220128 |
uint8_t alpha = alpha_values[x]; |
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220128 |
uint32_t pixel = colors[code & 3] | ((unsigned)alpha << 24); |
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220128 |
code >>= 2; |
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220128 |
AV_WL32(dst + x * 4, pixel); |
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} |
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55032 |
dst += stride; |
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} |
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13758 |
} |
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/** Convert a premultiplied alpha pixel to a straight alpha pixel. */ |
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16384 |
static av_always_inline void premult2straight(uint8_t *src) |
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{ |
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16384 |
int r = src[0]; |
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16384 |
int g = src[1]; |
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16384 |
int b = src[2]; |
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16384 |
int a = src[3]; /* unchanged */ |
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16384 |
src[0] = (uint8_t) r * a / 255; |
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16384 |
src[1] = (uint8_t) g * a / 255; |
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16384 |
src[2] = (uint8_t) b * a / 255; |
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} |
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/** |
184 |
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* Decompress one block of a DXT2 texture and store the resulting |
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* RGBA pixels in 'dst'. |
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* |
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* @param dst output buffer. |
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* @param stride scanline in bytes. |
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* @param block block to decompress. |
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* @return how much texture data has been consumed. |
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*/ |
192 |
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512 |
static int dxt2_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block) |
193 |
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{ |
194 |
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int x, y; |
195 |
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196 |
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512 |
dxt3_block_internal(dst, stride, block); |
197 |
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198 |
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/* This format is DXT3, but returns premultiplied alpha. It needs to be |
199 |
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* converted because it's what lavc outputs (and swscale expects). */ |
200 |
✓✓ |
2560 |
for (y = 0; y < 4; y++) |
201 |
✓✓ |
10240 |
for (x = 0; x < 4; x++) |
202 |
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8192 |
premult2straight(dst + x * 4 + y * stride); |
203 |
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204 |
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512 |
return 16; |
205 |
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} |
206 |
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207 |
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/** |
208 |
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* Decompress one block of a DXT3 texture and store the resulting |
209 |
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* RGBA pixels in 'dst'. |
210 |
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* |
211 |
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* @param dst output buffer. |
212 |
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* @param stride scanline in bytes. |
213 |
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* @param block block to decompress. |
214 |
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* @return how much texture data has been consumed. |
215 |
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*/ |
216 |
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13246 |
static int dxt3_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block) |
217 |
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{ |
218 |
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13246 |
dxt3_block_internal(dst, stride, block); |
219 |
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220 |
|
13246 |
return 16; |
221 |
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} |
222 |
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223 |
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/** |
224 |
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* Decompress a BC 16x3 index block stored as |
225 |
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* h g f e |
226 |
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* d c b a |
227 |
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* p o n m |
228 |
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* l k j i |
229 |
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* |
230 |
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* Bits packed as |
231 |
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* | h | g | f | e | d | c | b | a | // Entry |
232 |
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* |765 432 107 654 321 076 543 210| // Bit |
233 |
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* |0000000000111111111112222222222| // Byte |
234 |
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* |
235 |
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* into 16 8-bit indices. |
236 |
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*/ |
237 |
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578816 |
static void decompress_indices(uint8_t *dst, const uint8_t *src) |
238 |
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{ |
239 |
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int block, i; |
240 |
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|
241 |
✓✓ |
1736448 |
for (block = 0; block < 2; block++) { |
242 |
|
1157632 |
int tmp = AV_RL24(src); |
243 |
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|
244 |
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/* Unpack 8x3 bit from last 3 byte block */ |
245 |
✓✓ |
10418688 |
for (i = 0; i < 8; i++) |
246 |
|
9261056 |
dst[i] = (tmp >> (i * 3)) & 0x7; |
247 |
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248 |
|
1157632 |
src += 3; |
249 |
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1157632 |
dst += 8; |
250 |
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} |
251 |
|
578816 |
} |
252 |
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253 |
|
570304 |
static inline void dxt5_block_internal(uint8_t *dst, ptrdiff_t stride, |
254 |
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const uint8_t *block) |
255 |
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{ |
256 |
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int x, y; |
257 |
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uint32_t colors[4]; |
258 |
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uint8_t alpha_indices[16]; |
259 |
|
570304 |
uint16_t color0 = AV_RL16(block + 8); |
260 |
|
570304 |
uint16_t color1 = AV_RL16(block + 10); |
261 |
|
570304 |
uint32_t code = AV_RL32(block + 12); |
262 |
|
570304 |
uint8_t alpha0 = *(block); |
263 |
|
570304 |
uint8_t alpha1 = *(block + 1); |
264 |
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265 |
|
570304 |
decompress_indices(alpha_indices, block + 2); |
266 |
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267 |
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570304 |
extract_color(colors, color0, color1, 1, 0); |
268 |
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269 |
✓✓ |
2851520 |
for (y = 0; y < 4; y++) { |
270 |
✓✓ |
11406080 |
for (x = 0; x < 4; x++) { |
271 |
|
9124864 |
int alpha_code = alpha_indices[x + y * 4]; |
272 |
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uint32_t pixel; |
273 |
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uint8_t alpha; |
274 |
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|
275 |
✓✓ |
9124864 |
if (alpha_code == 0) { |
276 |
|
4574453 |
alpha = alpha0; |
277 |
✓✓ |
4550411 |
} else if (alpha_code == 1) { |
278 |
|
4239259 |
alpha = alpha1; |
279 |
|
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} else { |
280 |
✓✓ |
311152 |
if (alpha0 > alpha1) { |
281 |
|
279934 |
alpha = (uint8_t) (((8 - alpha_code) * alpha0 + |
282 |
|
279934 |
(alpha_code - 1) * alpha1) / 7); |
283 |
|
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} else { |
284 |
✓✓ |
31218 |
if (alpha_code == 6) { |
285 |
|
6494 |
alpha = 0; |
286 |
✓✓ |
24724 |
} else if (alpha_code == 7) { |
287 |
|
18150 |
alpha = 255; |
288 |
|
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} else { |
289 |
|
6574 |
alpha = (uint8_t) (((6 - alpha_code) * alpha0 + |
290 |
|
6574 |
(alpha_code - 1) * alpha1) / 5); |
291 |
|
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} |
292 |
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} |
293 |
|
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} |
294 |
|
9124864 |
pixel = colors[code & 3] | ((unsigned)alpha << 24); |
295 |
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9124864 |
code >>= 2; |
296 |
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9124864 |
AV_WL32(dst + x * 4, pixel); |
297 |
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} |
298 |
|
2281216 |
dst += stride; |
299 |
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} |
300 |
|
570304 |
} |
301 |
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|
302 |
|
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/** |
303 |
|
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* Decompress one block of a DXT4 texture and store the resulting |
304 |
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* RGBA pixels in 'dst'. |
305 |
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* |
306 |
|
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* @param dst output buffer. |
307 |
|
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* @param stride scanline in bytes. |
308 |
|
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* @param block block to decompress. |
309 |
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* @return how much texture data has been consumed. |
310 |
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*/ |
311 |
|
512 |
static int dxt4_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block) |
312 |
|
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{ |
313 |
|
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int x, y; |
314 |
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|
315 |
|
512 |
dxt5_block_internal(dst, stride, block); |
316 |
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|
317 |
|
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/* This format is DXT5, but returns premultiplied alpha. It needs to be |
318 |
|
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* converted because it's what lavc outputs (and swscale expects). */ |
319 |
✓✓ |
2560 |
for (y = 0; y < 4; y++) |
320 |
✓✓ |
10240 |
for (x = 0; x < 4; x++) |
321 |
|
8192 |
premult2straight(dst + x * 4 + y * stride); |
322 |
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|
323 |
|
512 |
return 16; |
324 |
|
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} |
325 |
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|
326 |
|
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/** |
327 |
|
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* Decompress one block of a DXT5 texture and store the resulting |
328 |
|
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* RGBA pixels in 'dst'. |
329 |
|
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* |
330 |
|
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* @param dst output buffer. |
331 |
|
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* @param stride scanline in bytes. |
332 |
|
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* @param block block to decompress. |
333 |
|
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* @return how much texture data has been consumed. |
334 |
|
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*/ |
335 |
|
547584 |
static int dxt5_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block) |
336 |
|
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{ |
337 |
|
547584 |
dxt5_block_internal(dst, stride, block); |
338 |
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|
339 |
|
547584 |
return 16; |
340 |
|
|
} |
341 |
|
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|
342 |
|
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/** |
343 |
|
|
* Convert a YCoCg buffer to RGBA. |
344 |
|
|
* |
345 |
|
|
* @param src input buffer. |
346 |
|
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* @param scaled variant with scaled chroma components and opaque alpha. |
347 |
|
|
*/ |
348 |
|
355328 |
static av_always_inline void ycocg2rgba(uint8_t *src, int scaled) |
349 |
|
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{ |
350 |
|
355328 |
int r = src[0]; |
351 |
|
355328 |
int g = src[1]; |
352 |
|
355328 |
int b = src[2]; |
353 |
|
355328 |
int a = src[3]; |
354 |
|
|
|
355 |
✓✓ |
355328 |
int s = scaled ? (b >> 3) + 1 : 1; |
356 |
|
355328 |
int y = a; |
357 |
|
355328 |
int co = (r - 128) / s; |
358 |
|
355328 |
int cg = (g - 128) / s; |
359 |
|
|
|
360 |
|
355328 |
src[0] = av_clip_uint8(y + co - cg); |
361 |
|
355328 |
src[1] = av_clip_uint8(y + cg); |
362 |
|
355328 |
src[2] = av_clip_uint8(y - co - cg); |
363 |
✓✓ |
355328 |
src[3] = scaled ? 255 : b; |
364 |
|
355328 |
} |
365 |
|
|
|
366 |
|
|
/** |
367 |
|
|
* Decompress one block of a DXT5 texture with classic YCoCg and store |
368 |
|
|
* the resulting RGBA pixels in 'dst'. Alpha component is fully opaque. |
369 |
|
|
* |
370 |
|
|
* @param dst output buffer. |
371 |
|
|
* @param stride scanline in bytes. |
372 |
|
|
* @param block block to decompress. |
373 |
|
|
* @return how much texture data has been consumed. |
374 |
|
|
*/ |
375 |
|
512 |
static int dxt5y_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block) |
376 |
|
|
{ |
377 |
|
|
int x, y; |
378 |
|
|
|
379 |
|
|
/* This format is basically DXT5, with luma stored in alpha. |
380 |
|
|
* Run a normal decompress and then reorder the components. */ |
381 |
|
512 |
dxt5_block_internal(dst, stride, block); |
382 |
|
|
|
383 |
✓✓ |
2560 |
for (y = 0; y < 4; y++) |
384 |
✓✓ |
10240 |
for (x = 0; x < 4; x++) |
385 |
|
8192 |
ycocg2rgba(dst + x * 4 + y * stride, 0); |
386 |
|
|
|
387 |
|
512 |
return 16; |
388 |
|
|
} |
389 |
|
|
|
390 |
|
|
/** |
391 |
|
|
* Decompress one block of a DXT5 texture with scaled YCoCg and store |
392 |
|
|
* the resulting RGBA pixels in 'dst'. Alpha component is fully opaque. |
393 |
|
|
* |
394 |
|
|
* @param dst output buffer. |
395 |
|
|
* @param stride scanline in bytes. |
396 |
|
|
* @param block block to decompress. |
397 |
|
|
* @return how much texture data has been consumed. |
398 |
|
|
*/ |
399 |
|
21696 |
static int dxt5ys_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block) |
400 |
|
|
{ |
401 |
|
|
int x, y; |
402 |
|
|
|
403 |
|
|
/* This format is basically DXT5, with luma stored in alpha. |
404 |
|
|
* Run a normal decompress and then reorder the components. */ |
405 |
|
21696 |
dxt5_block_internal(dst, stride, block); |
406 |
|
|
|
407 |
✓✓ |
108480 |
for (y = 0; y < 4; y++) |
408 |
✓✓ |
433920 |
for (x = 0; x < 4; x++) |
409 |
|
347136 |
ycocg2rgba(dst + x * 4 + y * stride, 1); |
410 |
|
|
|
411 |
|
21696 |
return 16; |
412 |
|
|
} |
413 |
|
|
|
414 |
|
8512 |
static inline void rgtc_block_internal(uint8_t *dst, ptrdiff_t stride, |
415 |
|
|
const uint8_t *block, |
416 |
|
|
const int *color_tab, int mono, int offset, int pix_size) |
417 |
|
|
{ |
418 |
|
|
uint8_t indices[16]; |
419 |
|
|
int x, y; |
420 |
|
|
|
421 |
|
8512 |
decompress_indices(indices, block + 2); |
422 |
|
|
|
423 |
|
|
/* Only one or two channels are stored at most, since it only used to |
424 |
|
|
* compress specular (black and white) or normal (red and green) maps. |
425 |
|
|
* Although the standard says to zero out unused components, many |
426 |
|
|
* implementations fill all of them with the same value. */ |
427 |
✓✓ |
42560 |
for (y = 0; y < 4; y++) { |
428 |
✓✓ |
170240 |
for (x = 0; x < 4; x++) { |
429 |
|
136192 |
int i = indices[x + y * 4]; |
430 |
|
|
/* Interval expansion from [-1 1] or [0 1] to [0 255]. */ |
431 |
|
136192 |
int c = color_tab[i]; |
432 |
|
|
|
433 |
✓✓ |
136192 |
if (mono){ |
434 |
|
46080 |
dst [x * pix_size + y * stride + offset] = (uint8_t)c; |
435 |
|
|
} |
436 |
|
|
else{ |
437 |
|
90112 |
uint32_t pixel = RGBA(c, c, c, 255U); |
438 |
|
90112 |
AV_WL32(dst + x * pix_size + y * stride, pixel); |
439 |
|
|
} |
440 |
|
|
} |
441 |
|
|
} |
442 |
|
8512 |
} |
443 |
|
|
|
444 |
|
8512 |
static inline void rgtc1_block_internal(uint8_t *dst, ptrdiff_t stride, |
445 |
|
|
const uint8_t *block, int sign, int mono, int offset, int pix_size) |
446 |
|
|
{ |
447 |
|
|
int color_table[8]; |
448 |
|
|
int r0, r1; |
449 |
|
|
|
450 |
✓✓ |
8512 |
if (sign) { |
451 |
|
|
/* signed data is in [-128 127] so just offset it to unsigned |
452 |
|
|
* and it can be treated exactly the same */ |
453 |
|
1536 |
r0 = ((int8_t) block[0]) + 128; |
454 |
|
1536 |
r1 = ((int8_t) block[1]) + 128; |
455 |
|
|
} else { |
456 |
|
6976 |
r0 = block[0]; |
457 |
|
6976 |
r1 = block[1]; |
458 |
|
|
} |
459 |
|
|
|
460 |
|
8512 |
color_table[0] = r0; |
461 |
|
8512 |
color_table[1] = r1; |
462 |
|
|
|
463 |
✓✓ |
8512 |
if (r0 > r1) { |
464 |
|
|
/* 6 interpolated color values */ |
465 |
|
4848 |
color_table[2] = (6 * r0 + 1 * r1) / 7; // bit code 010 |
466 |
|
4848 |
color_table[3] = (5 * r0 + 2 * r1) / 7; // bit code 011 |
467 |
|
4848 |
color_table[4] = (4 * r0 + 3 * r1) / 7; // bit code 100 |
468 |
|
4848 |
color_table[5] = (3 * r0 + 4 * r1) / 7; // bit code 101 |
469 |
|
4848 |
color_table[6] = (2 * r0 + 5 * r1) / 7; // bit code 110 |
470 |
|
4848 |
color_table[7] = (1 * r0 + 6 * r1) / 7; // bit code 111 |
471 |
|
|
} else { |
472 |
|
|
/* 4 interpolated color values */ |
473 |
|
3664 |
color_table[2] = (4 * r0 + 1 * r1) / 5; // bit code 010 |
474 |
|
3664 |
color_table[3] = (3 * r0 + 2 * r1) / 5; // bit code 011 |
475 |
|
3664 |
color_table[4] = (2 * r0 + 3 * r1) / 5; // bit code 100 |
476 |
|
3664 |
color_table[5] = (1 * r0 + 4 * r1) / 5; // bit code 101 |
477 |
|
3664 |
color_table[6] = 0; /* min range */ // bit code 110 |
478 |
|
3664 |
color_table[7] = 255; /* max range */ // bit code 111 |
479 |
|
|
} |
480 |
|
|
|
481 |
|
8512 |
rgtc_block_internal(dst, stride, block, color_table, mono, offset, pix_size); |
482 |
|
8512 |
} |
483 |
|
|
|
484 |
|
|
/** |
485 |
|
|
* Decompress one block of a RGRC1 texture with signed components |
486 |
|
|
* and store the resulting RGBA pixels in 'dst'. |
487 |
|
|
* |
488 |
|
|
* @param dst output buffer. |
489 |
|
|
* @param stride scanline in bytes. |
490 |
|
|
* @param block block to decompress. |
491 |
|
|
* @return how much texture data has been consumed. |
492 |
|
|
*/ |
493 |
|
512 |
static int rgtc1s_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block) |
494 |
|
|
{ |
495 |
|
512 |
rgtc1_block_internal(dst, stride, block, 1, 0, 0, 4); |
496 |
|
|
|
497 |
|
512 |
return 8; |
498 |
|
|
} |
499 |
|
|
|
500 |
|
|
/** |
501 |
|
|
* Decompress one block of a RGRC1 texture with unsigned components |
502 |
|
|
* and store the resulting RGBA pixels in 'dst'. |
503 |
|
|
* |
504 |
|
|
* @param dst output buffer. |
505 |
|
|
* @param stride scanline in bytes. |
506 |
|
|
* @param block block to decompress. |
507 |
|
|
* @return how much texture data has been consumed. |
508 |
|
|
*/ |
509 |
|
1024 |
static int rgtc1u_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block) |
510 |
|
|
{ |
511 |
|
1024 |
rgtc1_block_internal(dst, stride, block, 0, 0, 0, 4); |
512 |
|
|
|
513 |
|
1024 |
return 8; |
514 |
|
|
} |
515 |
|
|
|
516 |
|
|
/** |
517 |
|
|
* Decompress one block of a RGTC1 texture with unsigned components |
518 |
|
|
* and overwrite the alpha component in 'dst' (RGBA data). |
519 |
|
|
* |
520 |
|
|
* @param dst output buffer. |
521 |
|
|
* @param stride scanline in bytes. |
522 |
|
|
* @param block block to decompress. |
523 |
|
|
* @return how much texture data has been consumed. |
524 |
|
|
*/ |
525 |
|
1728 |
static int rgtc1u_alpha_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block) |
526 |
|
|
{ |
527 |
|
1728 |
rgtc1_block_internal(dst, stride, block, 0, 1, 3, 4); |
528 |
|
|
|
529 |
|
1728 |
return 8; |
530 |
|
|
} |
531 |
|
|
|
532 |
|
|
/** |
533 |
|
|
* Decompress one block of a RGTC1 texture with unsigned components |
534 |
|
|
* to Gray 8. |
535 |
|
|
* |
536 |
|
|
* @param dst output buffer. |
537 |
|
|
* @param stride scanline in bytes. |
538 |
|
|
* @param block block to decompress. |
539 |
|
|
* @return how much texture data has been consumed. |
540 |
|
|
*/ |
541 |
|
1152 |
static int rgtc1u_gray_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block) |
542 |
|
|
{ |
543 |
|
1152 |
rgtc1_block_internal(dst, stride, block, 0, 1, 0, 1); |
544 |
|
|
|
545 |
|
1152 |
return 8; |
546 |
|
|
} |
547 |
|
|
|
548 |
|
2048 |
static inline void rgtc2_block_internal(uint8_t *dst, ptrdiff_t stride, |
549 |
|
|
const uint8_t *block, int sign) |
550 |
|
|
{ |
551 |
|
|
/* 4x4 block containing 4 component pixels. */ |
552 |
|
|
uint8_t c0[4 * 4 * 4]; |
553 |
|
|
uint8_t c1[4 * 4 * 4]; |
554 |
|
|
int x, y; |
555 |
|
|
|
556 |
|
|
/* Decompress the two channels separately and interleave them afterwards. */ |
557 |
|
2048 |
rgtc1_block_internal(c0, 16, block, sign, 0, 0, 4); |
558 |
|
2048 |
rgtc1_block_internal(c1, 16, block + 8, sign, 0, 0, 4); |
559 |
|
|
|
560 |
|
|
/* B is rebuilt exactly like a normal map. */ |
561 |
✓✓ |
10240 |
for (y = 0; y < 4; y++) { |
562 |
✓✓ |
40960 |
for (x = 0; x < 4; x++) { |
563 |
|
32768 |
uint8_t *p = dst + x * 4 + y * stride; |
564 |
|
32768 |
int r = c0[x * 4 + y * 16]; |
565 |
|
32768 |
int g = c1[x * 4 + y * 16]; |
566 |
|
32768 |
int b = 127; |
567 |
|
|
|
568 |
|
32768 |
int d = (255 * 255 - r * r - g * g) / 2; |
569 |
✓✓ |
32768 |
if (d > 0) |
570 |
|
26534 |
b = lrint(sqrtf(d)); |
571 |
|
|
|
572 |
|
32768 |
p[0] = r; |
573 |
|
32768 |
p[1] = g; |
574 |
|
32768 |
p[2] = b; |
575 |
|
32768 |
p[3] = 255; |
576 |
|
|
} |
577 |
|
|
} |
578 |
|
2048 |
} |
579 |
|
|
|
580 |
|
|
/** |
581 |
|
|
* Decompress one block of a RGRC2 texture with signed components |
582 |
|
|
* and store the resulting RGBA pixels in 'dst'. Alpha is fully opaque. |
583 |
|
|
* |
584 |
|
|
* @param dst output buffer. |
585 |
|
|
* @param stride scanline in bytes. |
586 |
|
|
* @param block block to decompress. |
587 |
|
|
* @return how much texture data has been consumed. |
588 |
|
|
*/ |
589 |
|
512 |
static int rgtc2s_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block) |
590 |
|
|
{ |
591 |
|
512 |
rgtc2_block_internal(dst, stride, block, 1); |
592 |
|
|
|
593 |
|
512 |
return 16; |
594 |
|
|
} |
595 |
|
|
|
596 |
|
|
/** |
597 |
|
|
* Decompress one block of a RGRC2 texture with unsigned components |
598 |
|
|
* and store the resulting RGBA pixels in 'dst'. Alpha is fully opaque. |
599 |
|
|
* |
600 |
|
|
* @param dst output buffer. |
601 |
|
|
* @param stride scanline in bytes. |
602 |
|
|
* @param block block to decompress. |
603 |
|
|
* @return how much texture data has been consumed. |
604 |
|
|
*/ |
605 |
|
512 |
static int rgtc2u_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block) |
606 |
|
|
{ |
607 |
|
512 |
rgtc2_block_internal(dst, stride, block, 0); |
608 |
|
|
|
609 |
|
512 |
return 16; |
610 |
|
|
} |
611 |
|
|
|
612 |
|
|
/** |
613 |
|
|
* Decompress one block of a 3Dc texture with unsigned components |
614 |
|
|
* and store the resulting RGBA pixels in 'dst'. Alpha is fully opaque. |
615 |
|
|
* |
616 |
|
|
* @param dst output buffer. |
617 |
|
|
* @param stride scanline in bytes. |
618 |
|
|
* @param block block to decompress. |
619 |
|
|
* @return how much texture data has been consumed. |
620 |
|
|
*/ |
621 |
|
1024 |
static int dxn3dc_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block) |
622 |
|
|
{ |
623 |
|
|
int x, y; |
624 |
|
1024 |
rgtc2_block_internal(dst, stride, block, 0); |
625 |
|
|
|
626 |
|
|
/* This is the 3Dc variant of RGTC2, with swapped R and G. */ |
627 |
✓✓ |
5120 |
for (y = 0; y < 4; y++) { |
628 |
✓✓ |
20480 |
for (x = 0; x < 4; x++) { |
629 |
|
16384 |
uint8_t *p = dst + x * 4 + y * stride; |
630 |
|
16384 |
FFSWAP(uint8_t, p[0], p[1]); |
631 |
|
|
} |
632 |
|
|
} |
633 |
|
|
|
634 |
|
1024 |
return 16; |
635 |
|
|
} |
636 |
|
|
|
637 |
|
148 |
av_cold void ff_texturedsp_init(TextureDSPContext *c) |
638 |
|
|
{ |
639 |
|
148 |
c->dxt1_block = dxt1_block; |
640 |
|
148 |
c->dxt1a_block = dxt1a_block; |
641 |
|
148 |
c->dxt2_block = dxt2_block; |
642 |
|
148 |
c->dxt3_block = dxt3_block; |
643 |
|
148 |
c->dxt4_block = dxt4_block; |
644 |
|
148 |
c->dxt5_block = dxt5_block; |
645 |
|
148 |
c->dxt5y_block = dxt5y_block; |
646 |
|
148 |
c->dxt5ys_block = dxt5ys_block; |
647 |
|
148 |
c->rgtc1s_block = rgtc1s_block; |
648 |
|
148 |
c->rgtc1u_block = rgtc1u_block; |
649 |
|
148 |
c->rgtc1u_gray_block = rgtc1u_gray_block; |
650 |
|
148 |
c->rgtc1u_alpha_block = rgtc1u_alpha_block; |
651 |
|
148 |
c->rgtc2s_block = rgtc2s_block; |
652 |
|
148 |
c->rgtc2u_block = rgtc2u_block; |
653 |
|
148 |
c->dxn3dc_block = dxn3dc_block; |
654 |
|
148 |
} |