1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/canvas/src/WebGLTexelConversions.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,986 @@
1.4 +/*
1.5 + * Copyright (C) 2010 Apple Inc. All rights reserved.
1.6 + * Copyright (C) 2010 Google Inc. All rights reserved.
1.7 + * Copyright (C) 2010 Mozilla Corporation. All rights reserved.
1.8 + *
1.9 + * Redistribution and use in source and binary forms, with or without
1.10 + * modification, are permitted provided that the following conditions
1.11 + * are met:
1.12 + * 1. Redistributions of source code must retain the above copyright
1.13 + * notice, this list of conditions and the following disclaimer.
1.14 + * 2. Redistributions in binary form must reproduce the above copyright
1.15 + * notice, this list of conditions and the following disclaimer in the
1.16 + * documentation and/or other materials provided with the distribution.
1.17 + *
1.18 + * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
1.19 + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1.20 + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
1.21 + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
1.22 + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
1.23 + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
1.24 + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
1.25 + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
1.26 + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
1.27 + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
1.28 + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.29 + */
1.30 +
1.31 +#ifndef WEBGLTEXELCONVERSIONS_H_
1.32 +#define WEBGLTEXELCONVERSIONS_H_
1.33 +
1.34 +#ifdef __SUNPRO_CC
1.35 +#define __restrict
1.36 +#endif
1.37 +
1.38 +#include "WebGLTypes.h"
1.39 +#include <stdint.h>
1.40 +#include "mozilla/Attributes.h"
1.41 +
1.42 +namespace mozilla {
1.43 +
1.44 +// single precision float
1.45 +// seeeeeeeemmmmmmmmmmmmmmmmmmmmmmm
1.46 +
1.47 +// half precision float
1.48 +// seeeeemmmmmmmmmm
1.49 +
1.50 +// IEEE 16bits floating point:
1.51 +const uint16_t kFloat16Value_Zero = 0x0000; // = 0000000000000000b
1.52 +const uint16_t kFloat16Value_One = 0x3C00; // = 0011110000000000b
1.53 +const uint16_t kFloat16Value_Infinity = 0x7C00; // = 0111110000000000b
1.54 +const uint16_t kFloat16Value_NaN = 0x7FFF; // = 011111yyyyyyyyyyb (nonzero y)
1.55 +
1.56 +MOZ_ALWAYS_INLINE uint16_t
1.57 +packToFloat16(float v)
1.58 +{
1.59 + union {
1.60 + float f32Value;
1.61 + uint32_t f32Bits;
1.62 + };
1.63 +
1.64 + f32Value = v;
1.65 +
1.66 + // pull the sign from v into f16bits
1.67 + uint16_t f16Bits = uint16_t(f32Bits >> 16) & 0x8000;
1.68 +
1.69 + // handle +/- 0
1.70 + if ((f32Bits & 0x7FFFFFFF) == 0x00000000) {
1.71 + return f16Bits;
1.72 + }
1.73 +
1.74 + // handle NaN
1.75 + if (f32Value != f32Value) {
1.76 + return f16Bits | kFloat16Value_NaN;
1.77 + }
1.78 +
1.79 + int32_t exp = int32_t(f32Bits >> 23) - 127;
1.80 +
1.81 + // too small, we clamp it to -0 or +0
1.82 + if (exp < -14) {
1.83 + return f16Bits;
1.84 + }
1.85 +
1.86 + // too big, we clamp it to -inf/+inf
1.87 + if (exp > 15) {
1.88 + return f16Bits | kFloat16Value_Infinity;
1.89 + }
1.90 +
1.91 + f16Bits |= uint16_t(exp + 15) << 10;
1.92 + f16Bits |= uint16_t(f32Bits >> 13) & 0x03FF;
1.93 +
1.94 + return f16Bits;
1.95 +}
1.96 +
1.97 +MOZ_ALWAYS_INLINE float
1.98 +unpackFromFloat16(uint16_t v)
1.99 +{
1.100 + union
1.101 + {
1.102 + float f32Value;
1.103 + uint32_t f32Bits;
1.104 + };
1.105 +
1.106 + // grab sign bit
1.107 + f32Bits = uint32_t(v & 0x8000) << 16;
1.108 +
1.109 + if ((v & 0x7FFF) == 0x0000) {
1.110 + // +0 or -0
1.111 + return f32Value;
1.112 + }
1.113 +
1.114 + uint16_t exp = (v >> 10) & 0x001F;
1.115 + if (exp == 0x001F) {
1.116 + if (v & 0x03FF) {
1.117 + // this is a NaN
1.118 + f32Bits |= 0x7FFFFFFF;
1.119 + } else {
1.120 + // this is -inf or +inf
1.121 + f32Bits |= 0x7F800000;
1.122 + }
1.123 + return f32Value;
1.124 + }
1.125 +
1.126 + f32Bits |= uint32_t(exp + (-15 + 127)) << 10;
1.127 + f32Bits |= uint32_t(v & 0x03FF) << 13;
1.128 +
1.129 + return f32Value;
1.130 +}
1.131 +
1.132 +MOZ_BEGIN_ENUM_CLASS(WebGLTexelPremultiplicationOp, int)
1.133 + None,
1.134 + Premultiply,
1.135 + Unpremultiply
1.136 +MOZ_END_ENUM_CLASS(WebGLTexelPremultiplicationOp)
1.137 +
1.138 +namespace WebGLTexelConversions {
1.139 +
1.140 +template<MOZ_ENUM_CLASS_ENUM_TYPE(WebGLTexelFormat) Format>
1.141 +struct IsFloatFormat
1.142 +{
1.143 + static const bool Value =
1.144 + Format == WebGLTexelFormat::RGBA32F ||
1.145 + Format == WebGLTexelFormat::RGB32F ||
1.146 + Format == WebGLTexelFormat::RA32F ||
1.147 + Format == WebGLTexelFormat::R32F ||
1.148 + Format == WebGLTexelFormat::A32F;
1.149 +};
1.150 +
1.151 +template<MOZ_ENUM_CLASS_ENUM_TYPE(WebGLTexelFormat) Format>
1.152 +struct IsHalfFloatFormat
1.153 +{
1.154 + static const bool Value =
1.155 + Format == WebGLTexelFormat::RGBA16F ||
1.156 + Format == WebGLTexelFormat::RGB16F ||
1.157 + Format == WebGLTexelFormat::RA16F ||
1.158 + Format == WebGLTexelFormat::R16F ||
1.159 + Format == WebGLTexelFormat::A16F;
1.160 +};
1.161 +
1.162 +template<MOZ_ENUM_CLASS_ENUM_TYPE(WebGLTexelFormat) Format>
1.163 +struct Is16bppFormat
1.164 +{
1.165 + static const bool Value =
1.166 + Format == WebGLTexelFormat::RGBA4444 ||
1.167 + Format == WebGLTexelFormat::RGBA5551 ||
1.168 + Format == WebGLTexelFormat::RGB565;
1.169 +};
1.170 +
1.171 +template<MOZ_ENUM_CLASS_ENUM_TYPE(WebGLTexelFormat) Format,
1.172 + bool IsFloat = IsFloatFormat<Format>::Value,
1.173 + bool Is16bpp = Is16bppFormat<Format>::Value,
1.174 + bool IsHalfFloat = IsHalfFloatFormat<Format>::Value>
1.175 +struct DataTypeForFormat
1.176 +{
1.177 + typedef uint8_t Type;
1.178 +};
1.179 +
1.180 +template<MOZ_ENUM_CLASS_ENUM_TYPE(WebGLTexelFormat) Format>
1.181 +struct DataTypeForFormat<Format, true, false, false>
1.182 +{
1.183 + typedef float Type;
1.184 +};
1.185 +
1.186 +template<MOZ_ENUM_CLASS_ENUM_TYPE(WebGLTexelFormat) Format>
1.187 +struct DataTypeForFormat<Format, false, true, false>
1.188 +{
1.189 + typedef uint16_t Type;
1.190 +};
1.191 +
1.192 +template<MOZ_ENUM_CLASS_ENUM_TYPE(WebGLTexelFormat) Format>
1.193 +struct DataTypeForFormat<Format, false, false, true>
1.194 +{
1.195 + typedef uint16_t Type;
1.196 +};
1.197 +
1.198 +template<MOZ_ENUM_CLASS_ENUM_TYPE(WebGLTexelFormat) Format>
1.199 +struct IntermediateFormat
1.200 +{
1.201 + static const MOZ_ENUM_CLASS_ENUM_TYPE(WebGLTexelFormat) Value
1.202 + = IsFloatFormat<Format>::Value
1.203 + ? WebGLTexelFormat::RGBA32F
1.204 + : IsHalfFloatFormat<Format>::Value ? WebGLTexelFormat::RGBA16F
1.205 + : WebGLTexelFormat::RGBA8;
1.206 +};
1.207 +
1.208 +inline GLenum
1.209 +GLFormatForTexelFormat(WebGLTexelFormat format) {
1.210 + switch (format) {
1.211 + case WebGLTexelFormat::R8: return LOCAL_GL_LUMINANCE;
1.212 + case WebGLTexelFormat::A8: return LOCAL_GL_ALPHA;
1.213 + case WebGLTexelFormat::RA8: return LOCAL_GL_LUMINANCE_ALPHA;
1.214 + case WebGLTexelFormat::RGBA5551: return LOCAL_GL_RGBA;
1.215 + case WebGLTexelFormat::RGBA4444: return LOCAL_GL_RGBA;
1.216 + case WebGLTexelFormat::RGB565: return LOCAL_GL_RGB;
1.217 + case WebGLTexelFormat::D16: return LOCAL_GL_DEPTH_COMPONENT;
1.218 + case WebGLTexelFormat::RGB8: return LOCAL_GL_RGB;
1.219 + case WebGLTexelFormat::RGBA8: return LOCAL_GL_RGBA;
1.220 + case WebGLTexelFormat::BGRA8: return LOCAL_GL_BGRA;
1.221 + case WebGLTexelFormat::BGRX8: return LOCAL_GL_BGR;
1.222 + case WebGLTexelFormat::R32F: return LOCAL_GL_LUMINANCE;
1.223 + case WebGLTexelFormat::A32F: return LOCAL_GL_ALPHA;
1.224 + case WebGLTexelFormat::D32: return LOCAL_GL_DEPTH_COMPONENT;
1.225 + case WebGLTexelFormat::D24S8: return LOCAL_GL_DEPTH_STENCIL;
1.226 + case WebGLTexelFormat::RA32F: return LOCAL_GL_LUMINANCE_ALPHA;
1.227 + case WebGLTexelFormat::RGB32F: return LOCAL_GL_RGB;
1.228 + case WebGLTexelFormat::RGBA32F: return LOCAL_GL_RGBA;
1.229 + case WebGLTexelFormat::R16F: return LOCAL_GL_LUMINANCE;
1.230 + case WebGLTexelFormat::A16F: return LOCAL_GL_ALPHA;
1.231 + case WebGLTexelFormat::RA16F: return LOCAL_GL_LUMINANCE_ALPHA;
1.232 + case WebGLTexelFormat::RGB16F: return LOCAL_GL_RGB;
1.233 + case WebGLTexelFormat::RGBA16F: return LOCAL_GL_RGBA;
1.234 + default:
1.235 + MOZ_CRASH("Unknown texel format. Coding mistake?");
1.236 + return LOCAL_GL_INVALID_ENUM;
1.237 + }
1.238 +}
1.239 +
1.240 +inline size_t TexelBytesForFormat(WebGLTexelFormat format) {
1.241 + switch (format) {
1.242 + case WebGLTexelFormat::R8:
1.243 + case WebGLTexelFormat::A8:
1.244 + return 1;
1.245 + case WebGLTexelFormat::RA8:
1.246 + case WebGLTexelFormat::RGBA5551:
1.247 + case WebGLTexelFormat::RGBA4444:
1.248 + case WebGLTexelFormat::RGB565:
1.249 + case WebGLTexelFormat::R16F:
1.250 + case WebGLTexelFormat::A16F:
1.251 + case WebGLTexelFormat::D16:
1.252 + return 2;
1.253 + case WebGLTexelFormat::RGB8:
1.254 + return 3;
1.255 + case WebGLTexelFormat::RGBA8:
1.256 + case WebGLTexelFormat::BGRA8:
1.257 + case WebGLTexelFormat::BGRX8:
1.258 + case WebGLTexelFormat::R32F:
1.259 + case WebGLTexelFormat::A32F:
1.260 + case WebGLTexelFormat::D32:
1.261 + case WebGLTexelFormat::D24S8:
1.262 + case WebGLTexelFormat::RA16F:
1.263 + return 4;
1.264 + case WebGLTexelFormat::RGB16F:
1.265 + return 6;
1.266 + case WebGLTexelFormat::RGBA16F:
1.267 + case WebGLTexelFormat::RA32F:
1.268 + return 8;
1.269 + case WebGLTexelFormat::RGB32F:
1.270 + return 12;
1.271 + case WebGLTexelFormat::RGBA32F:
1.272 + return 16;
1.273 + default:
1.274 + MOZ_ASSERT(false, "Unknown texel format. Coding mistake?");
1.275 + return 0;
1.276 + }
1.277 +}
1.278 +
1.279 +MOZ_ALWAYS_INLINE bool HasAlpha(WebGLTexelFormat format) {
1.280 + return format == WebGLTexelFormat::A8 ||
1.281 + format == WebGLTexelFormat::A16F ||
1.282 + format == WebGLTexelFormat::A32F ||
1.283 + format == WebGLTexelFormat::RA8 ||
1.284 + format == WebGLTexelFormat::RA16F ||
1.285 + format == WebGLTexelFormat::RA32F ||
1.286 + format == WebGLTexelFormat::RGBA8 ||
1.287 + format == WebGLTexelFormat::BGRA8 ||
1.288 + format == WebGLTexelFormat::RGBA16F ||
1.289 + format == WebGLTexelFormat::RGBA32F ||
1.290 + format == WebGLTexelFormat::RGBA4444 ||
1.291 + format == WebGLTexelFormat::RGBA5551;
1.292 +}
1.293 +
1.294 +MOZ_ALWAYS_INLINE bool HasColor(WebGLTexelFormat format) {
1.295 + return format == WebGLTexelFormat::R8 ||
1.296 + format == WebGLTexelFormat::R16F ||
1.297 + format == WebGLTexelFormat::R32F ||
1.298 + format == WebGLTexelFormat::RA8 ||
1.299 + format == WebGLTexelFormat::RA16F ||
1.300 + format == WebGLTexelFormat::RA32F ||
1.301 + format == WebGLTexelFormat::RGB8 ||
1.302 + format == WebGLTexelFormat::BGRX8 ||
1.303 + format == WebGLTexelFormat::RGB565 ||
1.304 + format == WebGLTexelFormat::RGB16F ||
1.305 + format == WebGLTexelFormat::RGB32F ||
1.306 + format == WebGLTexelFormat::RGBA8 ||
1.307 + format == WebGLTexelFormat::BGRA8 ||
1.308 + format == WebGLTexelFormat::RGBA16F ||
1.309 + format == WebGLTexelFormat::RGBA32F ||
1.310 + format == WebGLTexelFormat::RGBA4444 ||
1.311 + format == WebGLTexelFormat::RGBA5551;
1.312 +}
1.313 +
1.314 +
1.315 +/****** BEGIN CODE SHARED WITH WEBKIT ******/
1.316 +
1.317 +// the pack/unpack functions here are originally from this file:
1.318 +// http://trac.webkit.org/browser/trunk/WebCore/platform/graphics/GraphicsContext3D.cpp
1.319 +
1.320 +//----------------------------------------------------------------------
1.321 +// Pixel unpacking routines.
1.322 +
1.323 +template<MOZ_ENUM_CLASS_ENUM_TYPE(WebGLTexelFormat) Format, typename SrcType, typename DstType>
1.324 +MOZ_ALWAYS_INLINE void
1.325 +unpack(const SrcType* __restrict src,
1.326 + DstType* __restrict dst)
1.327 +{
1.328 + MOZ_ASSERT(false, "Unimplemented texture format conversion");
1.329 +}
1.330 +
1.331 +template<> MOZ_ALWAYS_INLINE void
1.332 +unpack<WebGLTexelFormat::RGBA8, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
1.333 +{
1.334 + dst[0] = src[0];
1.335 + dst[1] = src[1];
1.336 + dst[2] = src[2];
1.337 + dst[3] = src[3];
1.338 +}
1.339 +
1.340 +template<> MOZ_ALWAYS_INLINE void
1.341 +unpack<WebGLTexelFormat::RGB8, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
1.342 +{
1.343 + dst[0] = src[0];
1.344 + dst[1] = src[1];
1.345 + dst[2] = src[2];
1.346 + dst[3] = 0xFF;
1.347 +}
1.348 +
1.349 +template<> MOZ_ALWAYS_INLINE void
1.350 +unpack<WebGLTexelFormat::BGRA8, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
1.351 +{
1.352 + dst[0] = src[2];
1.353 + dst[1] = src[1];
1.354 + dst[2] = src[0];
1.355 + dst[3] = src[3];
1.356 +}
1.357 +
1.358 +template<> MOZ_ALWAYS_INLINE void
1.359 +unpack<WebGLTexelFormat::BGRX8, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
1.360 +{
1.361 + dst[0] = src[2];
1.362 + dst[1] = src[1];
1.363 + dst[2] = src[0];
1.364 + dst[3] = 0xFF;
1.365 +}
1.366 +
1.367 +template<> MOZ_ALWAYS_INLINE void
1.368 +unpack<WebGLTexelFormat::RGBA5551, uint16_t, uint8_t>(const uint16_t* __restrict src, uint8_t* __restrict dst)
1.369 +{
1.370 + uint16_t packedValue = src[0];
1.371 + uint8_t r = (packedValue >> 11) & 0x1F;
1.372 + uint8_t g = (packedValue >> 6) & 0x1F;
1.373 + uint8_t b = (packedValue >> 1) & 0x1F;
1.374 + dst[0] = (r << 3) | (r & 0x7);
1.375 + dst[1] = (g << 3) | (g & 0x7);
1.376 + dst[2] = (b << 3) | (b & 0x7);
1.377 + dst[3] = (packedValue & 0x1) ? 0xFF : 0;
1.378 +}
1.379 +
1.380 +template<> MOZ_ALWAYS_INLINE void
1.381 +unpack<WebGLTexelFormat::RGBA4444, uint16_t, uint8_t>(const uint16_t* __restrict src, uint8_t* __restrict dst)
1.382 +{
1.383 + uint16_t packedValue = src[0];
1.384 + uint8_t r = (packedValue >> 12) & 0x0F;
1.385 + uint8_t g = (packedValue >> 8) & 0x0F;
1.386 + uint8_t b = (packedValue >> 4) & 0x0F;
1.387 + uint8_t a = packedValue & 0x0F;
1.388 + dst[0] = (r << 4) | r;
1.389 + dst[1] = (g << 4) | g;
1.390 + dst[2] = (b << 4) | b;
1.391 + dst[3] = (a << 4) | a;
1.392 +}
1.393 +
1.394 +template<> MOZ_ALWAYS_INLINE void
1.395 +unpack<WebGLTexelFormat::RGB565, uint16_t, uint8_t>(const uint16_t* __restrict src, uint8_t* __restrict dst)
1.396 +{
1.397 + uint16_t packedValue = src[0];
1.398 + uint8_t r = (packedValue >> 11) & 0x1F;
1.399 + uint8_t g = (packedValue >> 5) & 0x3F;
1.400 + uint8_t b = packedValue & 0x1F;
1.401 + dst[0] = (r << 3) | (r & 0x7);
1.402 + dst[1] = (g << 2) | (g & 0x3);
1.403 + dst[2] = (b << 3) | (b & 0x7);
1.404 + dst[3] = 0xFF;
1.405 +}
1.406 +
1.407 +template<> MOZ_ALWAYS_INLINE void
1.408 +unpack<WebGLTexelFormat::R8, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
1.409 +{
1.410 + dst[0] = src[0];
1.411 + dst[1] = src[0];
1.412 + dst[2] = src[0];
1.413 + dst[3] = 0xFF;
1.414 +}
1.415 +
1.416 +template<> MOZ_ALWAYS_INLINE void
1.417 +unpack<WebGLTexelFormat::RA8, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
1.418 +{
1.419 + dst[0] = src[0];
1.420 + dst[1] = src[0];
1.421 + dst[2] = src[0];
1.422 + dst[3] = src[1];
1.423 +}
1.424 +
1.425 +template<> MOZ_ALWAYS_INLINE void
1.426 +unpack<WebGLTexelFormat::A8, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
1.427 +{
1.428 + dst[0] = 0;
1.429 + dst[1] = 0;
1.430 + dst[2] = 0;
1.431 + dst[3] = src[0];
1.432 +}
1.433 +
1.434 +template<> MOZ_ALWAYS_INLINE void
1.435 +unpack<WebGLTexelFormat::RGBA32F, float, float>(const float* __restrict src, float* __restrict dst)
1.436 +{
1.437 + dst[0] = src[0];
1.438 + dst[1] = src[1];
1.439 + dst[2] = src[2];
1.440 + dst[3] = src[3];
1.441 +}
1.442 +
1.443 +template<> MOZ_ALWAYS_INLINE void
1.444 +unpack<WebGLTexelFormat::RGB32F, float, float>(const float* __restrict src, float* __restrict dst)
1.445 +{
1.446 + dst[0] = src[0];
1.447 + dst[1] = src[1];
1.448 + dst[2] = src[2];
1.449 + dst[3] = 1.0f;
1.450 +}
1.451 +
1.452 +template<> MOZ_ALWAYS_INLINE void
1.453 +unpack<WebGLTexelFormat::R32F, float, float>(const float* __restrict src, float* __restrict dst)
1.454 +{
1.455 + dst[0] = src[0];
1.456 + dst[1] = src[0];
1.457 + dst[2] = src[0];
1.458 + dst[3] = 1.0f;
1.459 +}
1.460 +
1.461 +template<> MOZ_ALWAYS_INLINE void
1.462 +unpack<WebGLTexelFormat::RA32F, float, float>(const float* __restrict src, float* __restrict dst)
1.463 +{
1.464 + dst[0] = src[0];
1.465 + dst[1] = src[0];
1.466 + dst[2] = src[0];
1.467 + dst[3] = src[1];
1.468 +}
1.469 +
1.470 +template<> MOZ_ALWAYS_INLINE void
1.471 +unpack<WebGLTexelFormat::A32F, float, float>(const float* __restrict src, float* __restrict dst)
1.472 +{
1.473 + dst[0] = 0;
1.474 + dst[1] = 0;
1.475 + dst[2] = 0;
1.476 + dst[3] = src[0];
1.477 +}
1.478 +
1.479 +template<> MOZ_ALWAYS_INLINE void
1.480 +unpack<WebGLTexelFormat::RGBA16F, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
1.481 +{
1.482 + dst[0] = src[0];
1.483 + dst[1] = src[1];
1.484 + dst[2] = src[2];
1.485 + dst[3] = src[3];
1.486 +}
1.487 +
1.488 +template<> MOZ_ALWAYS_INLINE void
1.489 +unpack<WebGLTexelFormat::RGB16F, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
1.490 +{
1.491 + dst[0] = src[0];
1.492 + dst[1] = src[1];
1.493 + dst[2] = src[2];
1.494 + dst[3] = kFloat16Value_One;
1.495 +}
1.496 +
1.497 +template<> MOZ_ALWAYS_INLINE void
1.498 +unpack<WebGLTexelFormat::R16F, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
1.499 +{
1.500 + dst[0] = src[0];
1.501 + dst[1] = src[0];
1.502 + dst[2] = src[0];
1.503 + dst[3] = kFloat16Value_One;
1.504 +}
1.505 +
1.506 +template<> MOZ_ALWAYS_INLINE void
1.507 +unpack<WebGLTexelFormat::RA16F, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
1.508 +{
1.509 + dst[0] = src[0];
1.510 + dst[1] = src[0];
1.511 + dst[2] = src[0];
1.512 + dst[3] = src[1];
1.513 +}
1.514 +
1.515 +template<> MOZ_ALWAYS_INLINE void
1.516 +unpack<WebGLTexelFormat::A16F, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
1.517 +{
1.518 + dst[0] = kFloat16Value_Zero;
1.519 + dst[1] = kFloat16Value_Zero;
1.520 + dst[2] = kFloat16Value_Zero;
1.521 + dst[3] = src[0];
1.522 +}
1.523 +
1.524 +//----------------------------------------------------------------------
1.525 +// Pixel packing routines.
1.526 +//
1.527 +
1.528 +template<MOZ_ENUM_CLASS_ENUM_TYPE(WebGLTexelFormat) Format,
1.529 + MOZ_ENUM_CLASS_ENUM_TYPE(WebGLTexelPremultiplicationOp) PremultiplicationOp,
1.530 + typename SrcType,
1.531 + typename DstType>
1.532 +MOZ_ALWAYS_INLINE void
1.533 +pack(const SrcType* __restrict src,
1.534 + DstType* __restrict dst)
1.535 +{
1.536 + MOZ_ASSERT(false, "Unimplemented texture format conversion");
1.537 +}
1.538 +
1.539 +template<> MOZ_ALWAYS_INLINE void
1.540 +pack<WebGLTexelFormat::A8, WebGLTexelPremultiplicationOp::None, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
1.541 +{
1.542 + dst[0] = src[3];
1.543 +}
1.544 +
1.545 +template<> MOZ_ALWAYS_INLINE void
1.546 +pack<WebGLTexelFormat::A8, WebGLTexelPremultiplicationOp::Premultiply, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
1.547 +{
1.548 + dst[0] = src[3];
1.549 +}
1.550 +
1.551 +template<> MOZ_ALWAYS_INLINE void
1.552 +pack<WebGLTexelFormat::A8, WebGLTexelPremultiplicationOp::Unpremultiply, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
1.553 +{
1.554 + dst[0] = src[3];
1.555 +}
1.556 +
1.557 +template<> MOZ_ALWAYS_INLINE void
1.558 +pack<WebGLTexelFormat::R8, WebGLTexelPremultiplicationOp::None, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
1.559 +{
1.560 + dst[0] = src[0];
1.561 +}
1.562 +
1.563 +template<> MOZ_ALWAYS_INLINE void
1.564 +pack<WebGLTexelFormat::R8, WebGLTexelPremultiplicationOp::Premultiply, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
1.565 +{
1.566 + float scaleFactor = src[3] / 255.0f;
1.567 + uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
1.568 + dst[0] = srcR;
1.569 +}
1.570 +
1.571 +template<> MOZ_ALWAYS_INLINE void
1.572 +pack<WebGLTexelFormat::R8, WebGLTexelPremultiplicationOp::Unpremultiply, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
1.573 +{
1.574 + float scaleFactor = src[3] ? 255.0f / src[3] : 1.0f;
1.575 + uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
1.576 + dst[0] = srcR;
1.577 +}
1.578 +
1.579 +template<> MOZ_ALWAYS_INLINE void
1.580 +pack<WebGLTexelFormat::RA8, WebGLTexelPremultiplicationOp::None, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
1.581 +{
1.582 + dst[0] = src[0];
1.583 + dst[1] = src[3];
1.584 +}
1.585 +
1.586 +template<> MOZ_ALWAYS_INLINE void
1.587 +pack<WebGLTexelFormat::RA8, WebGLTexelPremultiplicationOp::Premultiply, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
1.588 +{
1.589 + float scaleFactor = src[3] / 255.0f;
1.590 + uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
1.591 + dst[0] = srcR;
1.592 + dst[1] = src[3];
1.593 +}
1.594 +
1.595 +// FIXME: this routine is lossy and must be removed.
1.596 +template<> MOZ_ALWAYS_INLINE void
1.597 +pack<WebGLTexelFormat::RA8, WebGLTexelPremultiplicationOp::Unpremultiply, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
1.598 +{
1.599 + float scaleFactor = src[3] ? 255.0f / src[3] : 1.0f;
1.600 + uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
1.601 + dst[0] = srcR;
1.602 + dst[1] = src[3];
1.603 +}
1.604 +
1.605 +template<> MOZ_ALWAYS_INLINE void
1.606 +pack<WebGLTexelFormat::RGB8, WebGLTexelPremultiplicationOp::None, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
1.607 +{
1.608 + dst[0] = src[0];
1.609 + dst[1] = src[1];
1.610 + dst[2] = src[2];
1.611 +}
1.612 +
1.613 +template<> MOZ_ALWAYS_INLINE void
1.614 +pack<WebGLTexelFormat::RGB8, WebGLTexelPremultiplicationOp::Premultiply, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
1.615 +{
1.616 + float scaleFactor = src[3] / 255.0f;
1.617 + uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
1.618 + uint8_t srcG = static_cast<uint8_t>(src[1] * scaleFactor);
1.619 + uint8_t srcB = static_cast<uint8_t>(src[2] * scaleFactor);
1.620 + dst[0] = srcR;
1.621 + dst[1] = srcG;
1.622 + dst[2] = srcB;
1.623 +}
1.624 +
1.625 +template<> MOZ_ALWAYS_INLINE void
1.626 +pack<WebGLTexelFormat::RGB8, WebGLTexelPremultiplicationOp::Unpremultiply, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
1.627 +{
1.628 + float scaleFactor = src[3] ? 255.0f / src[3] : 1.0f;
1.629 + uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
1.630 + uint8_t srcG = static_cast<uint8_t>(src[1] * scaleFactor);
1.631 + uint8_t srcB = static_cast<uint8_t>(src[2] * scaleFactor);
1.632 + dst[0] = srcR;
1.633 + dst[1] = srcG;
1.634 + dst[2] = srcB;
1.635 +}
1.636 +
1.637 +template<> MOZ_ALWAYS_INLINE void
1.638 +pack<WebGLTexelFormat::RGBA8, WebGLTexelPremultiplicationOp::None, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
1.639 +{
1.640 + dst[0] = src[0];
1.641 + dst[1] = src[1];
1.642 + dst[2] = src[2];
1.643 + dst[3] = src[3];
1.644 +}
1.645 +
1.646 +template<> MOZ_ALWAYS_INLINE void
1.647 +pack<WebGLTexelFormat::RGBA8, WebGLTexelPremultiplicationOp::Premultiply, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
1.648 +{
1.649 + float scaleFactor = src[3] / 255.0f;
1.650 + uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
1.651 + uint8_t srcG = static_cast<uint8_t>(src[1] * scaleFactor);
1.652 + uint8_t srcB = static_cast<uint8_t>(src[2] * scaleFactor);
1.653 + dst[0] = srcR;
1.654 + dst[1] = srcG;
1.655 + dst[2] = srcB;
1.656 + dst[3] = src[3];
1.657 +}
1.658 +
1.659 +// FIXME: this routine is lossy and must be removed.
1.660 +template<> MOZ_ALWAYS_INLINE void
1.661 +pack<WebGLTexelFormat::RGBA8, WebGLTexelPremultiplicationOp::Unpremultiply, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
1.662 +{
1.663 + float scaleFactor = src[3] ? 255.0f / src[3] : 1.0f;
1.664 + uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
1.665 + uint8_t srcG = static_cast<uint8_t>(src[1] * scaleFactor);
1.666 + uint8_t srcB = static_cast<uint8_t>(src[2] * scaleFactor);
1.667 + dst[0] = srcR;
1.668 + dst[1] = srcG;
1.669 + dst[2] = srcB;
1.670 + dst[3] = src[3];
1.671 +}
1.672 +
1.673 +template<> MOZ_ALWAYS_INLINE void
1.674 +pack<WebGLTexelFormat::RGBA4444, WebGLTexelPremultiplicationOp::None, uint8_t, uint16_t>(const uint8_t* __restrict src, uint16_t* __restrict dst)
1.675 +{
1.676 + *dst = ( ((src[0] & 0xF0) << 8)
1.677 + | ((src[1] & 0xF0) << 4)
1.678 + | (src[2] & 0xF0)
1.679 + | (src[3] >> 4) );
1.680 +}
1.681 +
1.682 +template<> MOZ_ALWAYS_INLINE void
1.683 +pack<WebGLTexelFormat::RGBA4444, WebGLTexelPremultiplicationOp::Premultiply, uint8_t, uint16_t>(const uint8_t* __restrict src, uint16_t* __restrict dst)
1.684 +{
1.685 + float scaleFactor = src[3] / 255.0f;
1.686 + uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
1.687 + uint8_t srcG = static_cast<uint8_t>(src[1] * scaleFactor);
1.688 + uint8_t srcB = static_cast<uint8_t>(src[2] * scaleFactor);
1.689 + *dst = ( ((srcR & 0xF0) << 8)
1.690 + | ((srcG & 0xF0) << 4)
1.691 + | (srcB & 0xF0)
1.692 + | (src[3] >> 4));
1.693 +}
1.694 +
1.695 +// FIXME: this routine is lossy and must be removed.
1.696 +template<> MOZ_ALWAYS_INLINE void
1.697 +pack<WebGLTexelFormat::RGBA4444, WebGLTexelPremultiplicationOp::Unpremultiply, uint8_t, uint16_t>(const uint8_t* __restrict src, uint16_t* __restrict dst)
1.698 +{
1.699 + float scaleFactor = src[3] ? 255.0f / src[3] : 1.0f;
1.700 + uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
1.701 + uint8_t srcG = static_cast<uint8_t>(src[1] * scaleFactor);
1.702 + uint8_t srcB = static_cast<uint8_t>(src[2] * scaleFactor);
1.703 + *dst = ( ((srcR & 0xF0) << 8)
1.704 + | ((srcG & 0xF0) << 4)
1.705 + | (srcB & 0xF0)
1.706 + | (src[3] >> 4));
1.707 +}
1.708 +
1.709 +template<> MOZ_ALWAYS_INLINE void
1.710 +pack<WebGLTexelFormat::RGBA5551, WebGLTexelPremultiplicationOp::None, uint8_t, uint16_t>(const uint8_t* __restrict src, uint16_t* __restrict dst)
1.711 +{
1.712 + *dst = ( ((src[0] & 0xF8) << 8)
1.713 + | ((src[1] & 0xF8) << 3)
1.714 + | ((src[2] & 0xF8) >> 2)
1.715 + | (src[3] >> 7));
1.716 +}
1.717 +
1.718 +template<> MOZ_ALWAYS_INLINE void
1.719 +pack<WebGLTexelFormat::RGBA5551, WebGLTexelPremultiplicationOp::Premultiply, uint8_t, uint16_t>(const uint8_t* __restrict src, uint16_t* __restrict dst)
1.720 +{
1.721 + float scaleFactor = src[3] / 255.0f;
1.722 + uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
1.723 + uint8_t srcG = static_cast<uint8_t>(src[1] * scaleFactor);
1.724 + uint8_t srcB = static_cast<uint8_t>(src[2] * scaleFactor);
1.725 + *dst = ( ((srcR & 0xF8) << 8)
1.726 + | ((srcG & 0xF8) << 3)
1.727 + | ((srcB & 0xF8) >> 2)
1.728 + | (src[3] >> 7));
1.729 +}
1.730 +
1.731 +// FIXME: this routine is lossy and must be removed.
1.732 +template<> MOZ_ALWAYS_INLINE void
1.733 +pack<WebGLTexelFormat::RGBA5551, WebGLTexelPremultiplicationOp::Unpremultiply, uint8_t, uint16_t>(const uint8_t* __restrict src, uint16_t* __restrict dst)
1.734 +{
1.735 + float scaleFactor = src[3] ? 255.0f / src[3] : 1.0f;
1.736 + uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
1.737 + uint8_t srcG = static_cast<uint8_t>(src[1] * scaleFactor);
1.738 + uint8_t srcB = static_cast<uint8_t>(src[2] * scaleFactor);
1.739 + *dst = ( ((srcR & 0xF8) << 8)
1.740 + | ((srcG & 0xF8) << 3)
1.741 + | ((srcB & 0xF8) >> 2)
1.742 + | (src[3] >> 7));
1.743 +}
1.744 +
1.745 +template<> MOZ_ALWAYS_INLINE void
1.746 +pack<WebGLTexelFormat::RGB565, WebGLTexelPremultiplicationOp::None, uint8_t, uint16_t>(const uint8_t* __restrict src, uint16_t* __restrict dst)
1.747 +{
1.748 + *dst = ( ((src[0] & 0xF8) << 8)
1.749 + | ((src[1] & 0xFC) << 3)
1.750 + | ((src[2] & 0xF8) >> 3));
1.751 +}
1.752 +
1.753 +template<> MOZ_ALWAYS_INLINE void
1.754 +pack<WebGLTexelFormat::RGB565, WebGLTexelPremultiplicationOp::Premultiply, uint8_t, uint16_t>(const uint8_t* __restrict src, uint16_t* __restrict dst)
1.755 +{
1.756 + float scaleFactor = src[3] / 255.0f;
1.757 + uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
1.758 + uint8_t srcG = static_cast<uint8_t>(src[1] * scaleFactor);
1.759 + uint8_t srcB = static_cast<uint8_t>(src[2] * scaleFactor);
1.760 + *dst = ( ((srcR & 0xF8) << 8)
1.761 + | ((srcG & 0xFC) << 3)
1.762 + | ((srcB & 0xF8) >> 3));
1.763 +}
1.764 +
1.765 +// FIXME: this routine is lossy and must be removed.
1.766 +template<> MOZ_ALWAYS_INLINE void
1.767 +pack<WebGLTexelFormat::RGB565, WebGLTexelPremultiplicationOp::Unpremultiply, uint8_t, uint16_t>(const uint8_t* __restrict src, uint16_t* __restrict dst)
1.768 +{
1.769 + float scaleFactor = src[3] ? 255.0f / src[3] : 1.0f;
1.770 + uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
1.771 + uint8_t srcG = static_cast<uint8_t>(src[1] * scaleFactor);
1.772 + uint8_t srcB = static_cast<uint8_t>(src[2] * scaleFactor);
1.773 + *dst = ( ((srcR & 0xF8) << 8)
1.774 + | ((srcG & 0xFC) << 3)
1.775 + | ((srcB & 0xF8) >> 3));
1.776 +}
1.777 +
1.778 +template<> MOZ_ALWAYS_INLINE void
1.779 +pack<WebGLTexelFormat::RGB32F, WebGLTexelPremultiplicationOp::None, float, float>(const float* __restrict src, float* __restrict dst)
1.780 +{
1.781 + dst[0] = src[0];
1.782 + dst[1] = src[1];
1.783 + dst[2] = src[2];
1.784 +}
1.785 +
1.786 +template<> MOZ_ALWAYS_INLINE void
1.787 +pack<WebGLTexelFormat::RGB32F, WebGLTexelPremultiplicationOp::Premultiply, float, float>(const float* __restrict src, float* __restrict dst)
1.788 +{
1.789 + float scaleFactor = src[3];
1.790 + dst[0] = src[0] * scaleFactor;
1.791 + dst[1] = src[1] * scaleFactor;
1.792 + dst[2] = src[2] * scaleFactor;
1.793 +}
1.794 +
1.795 +template<> MOZ_ALWAYS_INLINE void
1.796 +pack<WebGLTexelFormat::RGBA32F, WebGLTexelPremultiplicationOp::None, float, float>(const float* __restrict src, float* __restrict dst)
1.797 +{
1.798 + dst[0] = src[0];
1.799 + dst[1] = src[1];
1.800 + dst[2] = src[2];
1.801 + dst[3] = src[3];
1.802 +}
1.803 +
1.804 +template<> MOZ_ALWAYS_INLINE void
1.805 +pack<WebGLTexelFormat::RGBA32F, WebGLTexelPremultiplicationOp::Premultiply, float, float>(const float* __restrict src, float* __restrict dst)
1.806 +{
1.807 + float scaleFactor = src[3];
1.808 + dst[0] = src[0] * scaleFactor;
1.809 + dst[1] = src[1] * scaleFactor;
1.810 + dst[2] = src[2] * scaleFactor;
1.811 + dst[3] = src[3];
1.812 +}
1.813 +
1.814 +template<> MOZ_ALWAYS_INLINE void
1.815 +pack<WebGLTexelFormat::A32F, WebGLTexelPremultiplicationOp::None, float, float>(const float* __restrict src, float* __restrict dst)
1.816 +{
1.817 + dst[0] = src[3];
1.818 +}
1.819 +
1.820 +template<> MOZ_ALWAYS_INLINE void
1.821 +pack<WebGLTexelFormat::A32F, WebGLTexelPremultiplicationOp::Premultiply, float, float>(const float* __restrict src, float* __restrict dst)
1.822 +{
1.823 + dst[0] = src[3];
1.824 +}
1.825 +
1.826 +template<> MOZ_ALWAYS_INLINE void
1.827 +pack<WebGLTexelFormat::R32F, WebGLTexelPremultiplicationOp::None, float, float>(const float* __restrict src, float* __restrict dst)
1.828 +{
1.829 + dst[0] = src[0];
1.830 +}
1.831 +
1.832 +template<> MOZ_ALWAYS_INLINE void
1.833 +pack<WebGLTexelFormat::R32F, WebGLTexelPremultiplicationOp::Premultiply, float, float>(const float* __restrict src, float* __restrict dst)
1.834 +{
1.835 + float scaleFactor = src[3];
1.836 + dst[0] = src[0] * scaleFactor;
1.837 +}
1.838 +
1.839 +template<> MOZ_ALWAYS_INLINE void
1.840 +pack<WebGLTexelFormat::RA32F, WebGLTexelPremultiplicationOp::None, float, float>(const float* __restrict src, float* __restrict dst)
1.841 +{
1.842 + dst[0] = src[0];
1.843 + dst[1] = src[3];
1.844 +}
1.845 +
1.846 +template<> MOZ_ALWAYS_INLINE void
1.847 +pack<WebGLTexelFormat::RA32F, WebGLTexelPremultiplicationOp::Premultiply, float, float>(const float* __restrict src, float* __restrict dst)
1.848 +{
1.849 + float scaleFactor = src[3];
1.850 + dst[0] = src[0] * scaleFactor;
1.851 + dst[1] = scaleFactor;
1.852 +}
1.853 +
1.854 +template<> MOZ_ALWAYS_INLINE void
1.855 +pack<WebGLTexelFormat::RGB16F, WebGLTexelPremultiplicationOp::None, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
1.856 +{
1.857 + dst[0] = src[0];
1.858 + dst[1] = src[1];
1.859 + dst[2] = src[2];
1.860 +}
1.861 +
1.862 +template<> MOZ_ALWAYS_INLINE void
1.863 +pack<WebGLTexelFormat::RGB16F, WebGLTexelPremultiplicationOp::Premultiply, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
1.864 +{
1.865 + float scaleFactor = unpackFromFloat16(src[3]);
1.866 + dst[0] = packToFloat16(unpackFromFloat16(src[0]) * scaleFactor);
1.867 + dst[1] = packToFloat16(unpackFromFloat16(src[1]) * scaleFactor);
1.868 + dst[2] = packToFloat16(unpackFromFloat16(src[2]) * scaleFactor);
1.869 +}
1.870 +
1.871 +template<> MOZ_ALWAYS_INLINE void
1.872 +pack<WebGLTexelFormat::RGBA16F, WebGLTexelPremultiplicationOp::None, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
1.873 +{
1.874 + dst[0] = src[0];
1.875 + dst[1] = src[1];
1.876 + dst[2] = src[2];
1.877 + dst[3] = src[3];
1.878 +}
1.879 +
1.880 +template<> MOZ_ALWAYS_INLINE void
1.881 +pack<WebGLTexelFormat::RGBA16F, WebGLTexelPremultiplicationOp::Premultiply, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
1.882 +{
1.883 + float scaleFactor = unpackFromFloat16(src[3]);
1.884 + dst[0] = packToFloat16(unpackFromFloat16(src[0]) * scaleFactor);
1.885 + dst[1] = packToFloat16(unpackFromFloat16(src[1]) * scaleFactor);
1.886 + dst[2] = packToFloat16(unpackFromFloat16(src[2]) * scaleFactor);
1.887 + dst[3] = src[3];
1.888 +}
1.889 +
1.890 +template<> MOZ_ALWAYS_INLINE void
1.891 +pack<WebGLTexelFormat::A16F, WebGLTexelPremultiplicationOp::None, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
1.892 +{
1.893 + dst[0] = src[3];
1.894 +}
1.895 +
1.896 +template<> MOZ_ALWAYS_INLINE void
1.897 +pack<WebGLTexelFormat::A16F, WebGLTexelPremultiplicationOp::Premultiply, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
1.898 +{
1.899 + dst[0] = src[3];
1.900 +}
1.901 +
1.902 +template<> MOZ_ALWAYS_INLINE void
1.903 +pack<WebGLTexelFormat::R16F, WebGLTexelPremultiplicationOp::None, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
1.904 +{
1.905 + dst[0] = src[0];
1.906 +}
1.907 +
1.908 +template<> MOZ_ALWAYS_INLINE void
1.909 +pack<WebGLTexelFormat::R16F, WebGLTexelPremultiplicationOp::Premultiply, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
1.910 +{
1.911 + float scaleFactor = unpackFromFloat16(src[3]);
1.912 + dst[0] = packToFloat16(unpackFromFloat16(src[0]) * scaleFactor);
1.913 +}
1.914 +
1.915 +template<> MOZ_ALWAYS_INLINE void
1.916 +pack<WebGLTexelFormat::RA16F, WebGLTexelPremultiplicationOp::None, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
1.917 +{
1.918 + dst[0] = src[0];
1.919 + dst[1] = src[3];
1.920 +}
1.921 +
1.922 +template<> MOZ_ALWAYS_INLINE void
1.923 +pack<WebGLTexelFormat::RA16F, WebGLTexelPremultiplicationOp::Premultiply, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
1.924 +{
1.925 + float scaleFactor = unpackFromFloat16(src[3]);
1.926 + dst[0] = packToFloat16(unpackFromFloat16(src[0]) * scaleFactor);
1.927 + dst[1] = scaleFactor;
1.928 +}
1.929 +
1.930 +/****** END CODE SHARED WITH WEBKIT ******/
1.931 +
1.932 +template<typename SrcType, typename DstType> MOZ_ALWAYS_INLINE void
1.933 +convertType(const SrcType* __restrict src, DstType* __restrict dst)
1.934 +{
1.935 + MOZ_ASSERT(false, "Unimplemented texture format conversion");
1.936 +}
1.937 +
1.938 +template<> MOZ_ALWAYS_INLINE void
1.939 +convertType<uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
1.940 +{
1.941 + dst[0] = src[0];
1.942 + dst[1] = src[1];
1.943 + dst[2] = src[2];
1.944 + dst[3] = src[3];
1.945 +}
1.946 +
1.947 +template<> MOZ_ALWAYS_INLINE void
1.948 +convertType<uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
1.949 +{
1.950 + dst[0] = src[0];
1.951 + dst[1] = src[1];
1.952 + dst[2] = src[2];
1.953 + dst[3] = src[3];
1.954 +}
1.955 +
1.956 +template<> MOZ_ALWAYS_INLINE void
1.957 +convertType<float, float>(const float* __restrict src, float* __restrict dst)
1.958 +{
1.959 + dst[0] = src[0];
1.960 + dst[1] = src[1];
1.961 + dst[2] = src[2];
1.962 + dst[3] = src[3];
1.963 +}
1.964 +
1.965 +template<> MOZ_ALWAYS_INLINE void
1.966 +convertType<uint8_t, float>(const uint8_t* __restrict src, float* __restrict dst)
1.967 +{
1.968 + const float scaleFactor = 1.f / 255.0f;
1.969 + dst[0] = src[0] * scaleFactor;
1.970 + dst[1] = src[1] * scaleFactor;
1.971 + dst[2] = src[2] * scaleFactor;
1.972 + dst[3] = src[3] * scaleFactor;
1.973 +}
1.974 +
1.975 +template<> MOZ_ALWAYS_INLINE void
1.976 +convertType<uint8_t, uint16_t>(const uint8_t* __restrict src, uint16_t* __restrict dst)
1.977 +{
1.978 + const float scaleFactor = 1.f / 255.0f;
1.979 + dst[0] = packToFloat16(src[0] * scaleFactor);
1.980 + dst[1] = packToFloat16(src[1] * scaleFactor);
1.981 + dst[2] = packToFloat16(src[2] * scaleFactor);
1.982 + dst[3] = packToFloat16(src[3] * scaleFactor);
1.983 +}
1.984 +
1.985 +} // end namespace WebGLTexelConversions
1.986 +
1.987 +} // end namespace mozilla
1.988 +
1.989 +#endif // WEBGLTEXELCONVERSIONS_H_
