michael@0: /*
michael@0:  * Copyright (C) 2010 Apple Inc. All rights reserved.
michael@0:  * Copyright (C) 2010 Google Inc. All rights reserved.
michael@0:  * Copyright (C) 2010 Mozilla Corporation. All rights reserved.
michael@0:  *
michael@0:  * Redistribution and use in source and binary forms, with or without
michael@0:  * modification, are permitted provided that the following conditions
michael@0:  * are met:
michael@0:  * 1. Redistributions of source code must retain the above copyright
michael@0:  *    notice, this list of conditions and the following disclaimer.
michael@0:  * 2. Redistributions in binary form must reproduce the above copyright
michael@0:  *    notice, this list of conditions and the following disclaimer in the
michael@0:  *    documentation and/or other materials provided with the distribution.
michael@0:  *
michael@0:  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
michael@0:  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
michael@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
michael@0:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
michael@0:  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
michael@0:  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
michael@0:  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
michael@0:  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
michael@0:  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
michael@0:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
michael@0:  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
michael@0:  */
michael@0: 
michael@0: #ifndef WEBGLTEXELCONVERSIONS_H_
michael@0: #define WEBGLTEXELCONVERSIONS_H_
michael@0: 
michael@0: #ifdef __SUNPRO_CC
michael@0: #define __restrict
michael@0: #endif
michael@0: 
michael@0: #include "WebGLTypes.h"
michael@0: #include <stdint.h>
michael@0: #include "mozilla/Attributes.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: 
michael@0: // single precision float
michael@0: // seeeeeeeemmmmmmmmmmmmmmmmmmmmmmm
michael@0: 
michael@0: // half precision float
michael@0: // seeeeemmmmmmmmmm
michael@0: 
michael@0: // IEEE 16bits floating point:
michael@0: const uint16_t kFloat16Value_Zero     = 0x0000; // = 0000000000000000b
michael@0: const uint16_t kFloat16Value_One      = 0x3C00; // = 0011110000000000b
michael@0: const uint16_t kFloat16Value_Infinity = 0x7C00; // = 0111110000000000b
michael@0: const uint16_t kFloat16Value_NaN      = 0x7FFF; // = 011111yyyyyyyyyyb (nonzero y)
michael@0: 
michael@0: MOZ_ALWAYS_INLINE uint16_t
michael@0: packToFloat16(float v)
michael@0: {
michael@0:     union {
michael@0:         float f32Value;
michael@0:         uint32_t f32Bits;
michael@0:     };
michael@0: 
michael@0:     f32Value = v;
michael@0: 
michael@0:     // pull the sign from v into f16bits
michael@0:     uint16_t f16Bits = uint16_t(f32Bits >> 16) & 0x8000;
michael@0: 
michael@0:     // handle +/- 0
michael@0:     if ((f32Bits & 0x7FFFFFFF) == 0x00000000) {
michael@0:         return f16Bits;
michael@0:     }
michael@0: 
michael@0:     // handle NaN
michael@0:     if (f32Value != f32Value) {
michael@0:         return f16Bits | kFloat16Value_NaN;
michael@0:     }
michael@0: 
michael@0:     int32_t exp = int32_t(f32Bits >> 23) - 127;
michael@0: 
michael@0:     // too small, we clamp it to -0 or +0
michael@0:     if (exp < -14) {
michael@0:         return f16Bits;
michael@0:     }
michael@0: 
michael@0:     // too big, we clamp it to -inf/+inf
michael@0:     if (exp > 15) {
michael@0:         return f16Bits | kFloat16Value_Infinity;
michael@0:     }
michael@0: 
michael@0:     f16Bits |= uint16_t(exp + 15) << 10;
michael@0:     f16Bits |= uint16_t(f32Bits >> 13) & 0x03FF;
michael@0: 
michael@0:     return f16Bits;
michael@0: }
michael@0: 
michael@0: MOZ_ALWAYS_INLINE float
michael@0: unpackFromFloat16(uint16_t v)
michael@0: {
michael@0:     union
michael@0:     {
michael@0:         float f32Value;
michael@0:         uint32_t f32Bits;
michael@0:     };
michael@0: 
michael@0:     // grab sign bit
michael@0:     f32Bits = uint32_t(v & 0x8000) << 16;
michael@0: 
michael@0:     if ((v & 0x7FFF) == 0x0000) {
michael@0:         // +0 or -0
michael@0:         return f32Value;
michael@0:     }
michael@0: 
michael@0:     uint16_t exp = (v >> 10) & 0x001F;
michael@0:     if (exp == 0x001F) {
michael@0:         if (v & 0x03FF) {
michael@0:             // this is a NaN
michael@0:             f32Bits |= 0x7FFFFFFF;
michael@0:         } else {
michael@0:             // this is -inf or +inf
michael@0:             f32Bits |= 0x7F800000;
michael@0:         }
michael@0:         return f32Value;
michael@0:     }
michael@0: 
michael@0:     f32Bits |= uint32_t(exp + (-15 + 127)) << 10;
michael@0:     f32Bits |= uint32_t(v & 0x03FF) << 13;
michael@0: 
michael@0:     return f32Value;
michael@0: }
michael@0: 
michael@0: MOZ_BEGIN_ENUM_CLASS(WebGLTexelPremultiplicationOp, int)
michael@0:     None,
michael@0:     Premultiply,
michael@0:     Unpremultiply
michael@0: MOZ_END_ENUM_CLASS(WebGLTexelPremultiplicationOp)
michael@0: 
michael@0: namespace WebGLTexelConversions {
michael@0: 
michael@0: template<MOZ_ENUM_CLASS_ENUM_TYPE(WebGLTexelFormat) Format>
michael@0: struct IsFloatFormat
michael@0: {
michael@0:     static const bool Value =
michael@0:         Format == WebGLTexelFormat::RGBA32F ||
michael@0:         Format == WebGLTexelFormat::RGB32F ||
michael@0:         Format == WebGLTexelFormat::RA32F ||
michael@0:         Format == WebGLTexelFormat::R32F ||
michael@0:         Format == WebGLTexelFormat::A32F;
michael@0: };
michael@0: 
michael@0: template<MOZ_ENUM_CLASS_ENUM_TYPE(WebGLTexelFormat) Format>
michael@0: struct IsHalfFloatFormat
michael@0: {
michael@0:     static const bool Value =
michael@0:         Format == WebGLTexelFormat::RGBA16F ||
michael@0:         Format == WebGLTexelFormat::RGB16F ||
michael@0:         Format == WebGLTexelFormat::RA16F ||
michael@0:         Format == WebGLTexelFormat::R16F ||
michael@0:         Format == WebGLTexelFormat::A16F;
michael@0: };
michael@0: 
michael@0: template<MOZ_ENUM_CLASS_ENUM_TYPE(WebGLTexelFormat) Format>
michael@0: struct Is16bppFormat
michael@0: {
michael@0:     static const bool Value =
michael@0:         Format == WebGLTexelFormat::RGBA4444 ||
michael@0:         Format == WebGLTexelFormat::RGBA5551 ||
michael@0:         Format == WebGLTexelFormat::RGB565;
michael@0: };
michael@0: 
michael@0: template<MOZ_ENUM_CLASS_ENUM_TYPE(WebGLTexelFormat) Format,
michael@0:          bool IsFloat = IsFloatFormat<Format>::Value,
michael@0:          bool Is16bpp = Is16bppFormat<Format>::Value,
michael@0:          bool IsHalfFloat = IsHalfFloatFormat<Format>::Value>
michael@0: struct DataTypeForFormat
michael@0: {
michael@0:     typedef uint8_t Type;
michael@0: };
michael@0: 
michael@0: template<MOZ_ENUM_CLASS_ENUM_TYPE(WebGLTexelFormat) Format>
michael@0: struct DataTypeForFormat<Format, true, false, false>
michael@0: {
michael@0:     typedef float Type;
michael@0: };
michael@0: 
michael@0: template<MOZ_ENUM_CLASS_ENUM_TYPE(WebGLTexelFormat) Format>
michael@0: struct DataTypeForFormat<Format, false, true, false>
michael@0: {
michael@0:     typedef uint16_t Type;
michael@0: };
michael@0: 
michael@0: template<MOZ_ENUM_CLASS_ENUM_TYPE(WebGLTexelFormat) Format>
michael@0: struct DataTypeForFormat<Format, false, false, true>
michael@0: {
michael@0:     typedef uint16_t Type;
michael@0: };
michael@0: 
michael@0: template<MOZ_ENUM_CLASS_ENUM_TYPE(WebGLTexelFormat) Format>
michael@0: struct IntermediateFormat
michael@0: {
michael@0:     static const MOZ_ENUM_CLASS_ENUM_TYPE(WebGLTexelFormat) Value
michael@0:         = IsFloatFormat<Format>::Value
michael@0:           ? WebGLTexelFormat::RGBA32F
michael@0:           : IsHalfFloatFormat<Format>::Value ? WebGLTexelFormat::RGBA16F
michael@0:                                              : WebGLTexelFormat::RGBA8;
michael@0: };
michael@0: 
michael@0: inline GLenum
michael@0: GLFormatForTexelFormat(WebGLTexelFormat format) {
michael@0:     switch (format) {
michael@0:         case WebGLTexelFormat::R8:          return LOCAL_GL_LUMINANCE;
michael@0:         case WebGLTexelFormat::A8:          return LOCAL_GL_ALPHA;
michael@0:         case WebGLTexelFormat::RA8:         return LOCAL_GL_LUMINANCE_ALPHA;
michael@0:         case WebGLTexelFormat::RGBA5551:    return LOCAL_GL_RGBA;
michael@0:         case WebGLTexelFormat::RGBA4444:    return LOCAL_GL_RGBA;
michael@0:         case WebGLTexelFormat::RGB565:      return LOCAL_GL_RGB;
michael@0:         case WebGLTexelFormat::D16:         return LOCAL_GL_DEPTH_COMPONENT;
michael@0:         case WebGLTexelFormat::RGB8:        return LOCAL_GL_RGB;
michael@0:         case WebGLTexelFormat::RGBA8:       return LOCAL_GL_RGBA;
michael@0:         case WebGLTexelFormat::BGRA8:       return LOCAL_GL_BGRA;
michael@0:         case WebGLTexelFormat::BGRX8:       return LOCAL_GL_BGR;
michael@0:         case WebGLTexelFormat::R32F:        return LOCAL_GL_LUMINANCE;
michael@0:         case WebGLTexelFormat::A32F:        return LOCAL_GL_ALPHA;
michael@0:         case WebGLTexelFormat::D32:         return LOCAL_GL_DEPTH_COMPONENT;
michael@0:         case WebGLTexelFormat::D24S8:       return LOCAL_GL_DEPTH_STENCIL;
michael@0:         case WebGLTexelFormat::RA32F:       return LOCAL_GL_LUMINANCE_ALPHA;
michael@0:         case WebGLTexelFormat::RGB32F:      return LOCAL_GL_RGB;
michael@0:         case WebGLTexelFormat::RGBA32F:     return LOCAL_GL_RGBA;
michael@0:         case WebGLTexelFormat::R16F:        return LOCAL_GL_LUMINANCE;
michael@0:         case WebGLTexelFormat::A16F:        return LOCAL_GL_ALPHA;
michael@0:         case WebGLTexelFormat::RA16F:       return LOCAL_GL_LUMINANCE_ALPHA;
michael@0:         case WebGLTexelFormat::RGB16F:      return LOCAL_GL_RGB;
michael@0:         case WebGLTexelFormat::RGBA16F:     return LOCAL_GL_RGBA;
michael@0:         default:
michael@0:             MOZ_CRASH("Unknown texel format. Coding mistake?");
michael@0:             return LOCAL_GL_INVALID_ENUM;
michael@0:     }
michael@0: }
michael@0: 
michael@0: inline size_t TexelBytesForFormat(WebGLTexelFormat format) {
michael@0:     switch (format) {
michael@0:         case WebGLTexelFormat::R8:
michael@0:         case WebGLTexelFormat::A8:
michael@0:             return 1;
michael@0:         case WebGLTexelFormat::RA8:
michael@0:         case WebGLTexelFormat::RGBA5551:
michael@0:         case WebGLTexelFormat::RGBA4444:
michael@0:         case WebGLTexelFormat::RGB565:
michael@0:         case WebGLTexelFormat::R16F:
michael@0:         case WebGLTexelFormat::A16F:
michael@0:         case WebGLTexelFormat::D16:
michael@0:             return 2;
michael@0:         case WebGLTexelFormat::RGB8:
michael@0:             return 3;
michael@0:         case WebGLTexelFormat::RGBA8:
michael@0:         case WebGLTexelFormat::BGRA8:
michael@0:         case WebGLTexelFormat::BGRX8:
michael@0:         case WebGLTexelFormat::R32F:
michael@0:         case WebGLTexelFormat::A32F:
michael@0:         case WebGLTexelFormat::D32:
michael@0:         case WebGLTexelFormat::D24S8:
michael@0:         case WebGLTexelFormat::RA16F:
michael@0:             return 4;
michael@0:         case WebGLTexelFormat::RGB16F:
michael@0:             return 6;
michael@0:         case WebGLTexelFormat::RGBA16F:
michael@0:         case WebGLTexelFormat::RA32F:
michael@0:             return 8;
michael@0:         case WebGLTexelFormat::RGB32F:
michael@0:             return 12;
michael@0:         case WebGLTexelFormat::RGBA32F:
michael@0:             return 16;
michael@0:         default:
michael@0:             MOZ_ASSERT(false, "Unknown texel format. Coding mistake?");
michael@0:             return 0;
michael@0:     }
michael@0: }
michael@0: 
michael@0: MOZ_ALWAYS_INLINE bool HasAlpha(WebGLTexelFormat format) {
michael@0:     return format == WebGLTexelFormat::A8 ||
michael@0:            format == WebGLTexelFormat::A16F ||
michael@0:            format == WebGLTexelFormat::A32F ||
michael@0:            format == WebGLTexelFormat::RA8 ||
michael@0:            format == WebGLTexelFormat::RA16F ||
michael@0:            format == WebGLTexelFormat::RA32F ||
michael@0:            format == WebGLTexelFormat::RGBA8 ||
michael@0:            format == WebGLTexelFormat::BGRA8 ||
michael@0:            format == WebGLTexelFormat::RGBA16F ||
michael@0:            format == WebGLTexelFormat::RGBA32F ||
michael@0:            format == WebGLTexelFormat::RGBA4444 ||
michael@0:            format == WebGLTexelFormat::RGBA5551;
michael@0: }
michael@0: 
michael@0: MOZ_ALWAYS_INLINE bool HasColor(WebGLTexelFormat format) {
michael@0:     return format == WebGLTexelFormat::R8 ||
michael@0:            format == WebGLTexelFormat::R16F ||
michael@0:            format == WebGLTexelFormat::R32F ||
michael@0:            format == WebGLTexelFormat::RA8 ||
michael@0:            format == WebGLTexelFormat::RA16F ||
michael@0:            format == WebGLTexelFormat::RA32F ||
michael@0:            format == WebGLTexelFormat::RGB8 ||
michael@0:            format == WebGLTexelFormat::BGRX8 ||
michael@0:            format == WebGLTexelFormat::RGB565 ||
michael@0:            format == WebGLTexelFormat::RGB16F ||
michael@0:            format == WebGLTexelFormat::RGB32F ||
michael@0:            format == WebGLTexelFormat::RGBA8 ||
michael@0:            format == WebGLTexelFormat::BGRA8 ||
michael@0:            format == WebGLTexelFormat::RGBA16F ||
michael@0:            format == WebGLTexelFormat::RGBA32F ||
michael@0:            format == WebGLTexelFormat::RGBA4444 ||
michael@0:            format == WebGLTexelFormat::RGBA5551;
michael@0: }
michael@0: 
michael@0: 
michael@0: /****** BEGIN CODE SHARED WITH WEBKIT ******/
michael@0: 
michael@0: // the pack/unpack functions here are originally from this file:
michael@0: //   http://trac.webkit.org/browser/trunk/WebCore/platform/graphics/GraphicsContext3D.cpp
michael@0: 
michael@0: //----------------------------------------------------------------------
michael@0: // Pixel unpacking routines.
michael@0: 
michael@0: template<MOZ_ENUM_CLASS_ENUM_TYPE(WebGLTexelFormat) Format, typename SrcType, typename DstType>
michael@0: MOZ_ALWAYS_INLINE void
michael@0: unpack(const SrcType* __restrict src,
michael@0:        DstType* __restrict dst)
michael@0: {
michael@0:     MOZ_ASSERT(false, "Unimplemented texture format conversion");
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: unpack<WebGLTexelFormat::RGBA8, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0:     dst[1] = src[1];
michael@0:     dst[2] = src[2];
michael@0:     dst[3] = src[3];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: unpack<WebGLTexelFormat::RGB8, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0:     dst[1] = src[1];
michael@0:     dst[2] = src[2];
michael@0:     dst[3] = 0xFF;
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: unpack<WebGLTexelFormat::BGRA8, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[2];
michael@0:     dst[1] = src[1];
michael@0:     dst[2] = src[0];
michael@0:     dst[3] = src[3];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: unpack<WebGLTexelFormat::BGRX8, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[2];
michael@0:     dst[1] = src[1];
michael@0:     dst[2] = src[0];
michael@0:     dst[3] = 0xFF;
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: unpack<WebGLTexelFormat::RGBA5551, uint16_t, uint8_t>(const uint16_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     uint16_t packedValue = src[0];
michael@0:     uint8_t r = (packedValue >> 11) & 0x1F;
michael@0:     uint8_t g = (packedValue >> 6) & 0x1F;
michael@0:     uint8_t b = (packedValue >> 1) & 0x1F;
michael@0:     dst[0] = (r << 3) | (r & 0x7);
michael@0:     dst[1] = (g << 3) | (g & 0x7);
michael@0:     dst[2] = (b << 3) | (b & 0x7);
michael@0:     dst[3] = (packedValue & 0x1) ? 0xFF : 0;
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: unpack<WebGLTexelFormat::RGBA4444, uint16_t, uint8_t>(const uint16_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     uint16_t packedValue = src[0];
michael@0:     uint8_t r = (packedValue >> 12) & 0x0F;
michael@0:     uint8_t g = (packedValue >> 8) & 0x0F;
michael@0:     uint8_t b = (packedValue >> 4) & 0x0F;
michael@0:     uint8_t a = packedValue & 0x0F;
michael@0:     dst[0] = (r << 4) | r;
michael@0:     dst[1] = (g << 4) | g;
michael@0:     dst[2] = (b << 4) | b;
michael@0:     dst[3] = (a << 4) | a;
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: unpack<WebGLTexelFormat::RGB565, uint16_t, uint8_t>(const uint16_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     uint16_t packedValue = src[0];
michael@0:     uint8_t r = (packedValue >> 11) & 0x1F;
michael@0:     uint8_t g = (packedValue >> 5) & 0x3F;
michael@0:     uint8_t b = packedValue & 0x1F;
michael@0:     dst[0] = (r << 3) | (r & 0x7);
michael@0:     dst[1] = (g << 2) | (g & 0x3);
michael@0:     dst[2] = (b << 3) | (b & 0x7);
michael@0:     dst[3] = 0xFF;
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: unpack<WebGLTexelFormat::R8, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0:     dst[1] = src[0];
michael@0:     dst[2] = src[0];
michael@0:     dst[3] = 0xFF;
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: unpack<WebGLTexelFormat::RA8, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0:     dst[1] = src[0];
michael@0:     dst[2] = src[0];
michael@0:     dst[3] = src[1];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: unpack<WebGLTexelFormat::A8, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = 0;
michael@0:     dst[1] = 0;
michael@0:     dst[2] = 0;
michael@0:     dst[3] = src[0];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: unpack<WebGLTexelFormat::RGBA32F, float, float>(const float* __restrict src, float* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0:     dst[1] = src[1];
michael@0:     dst[2] = src[2];
michael@0:     dst[3] = src[3];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: unpack<WebGLTexelFormat::RGB32F, float, float>(const float* __restrict src, float* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0:     dst[1] = src[1];
michael@0:     dst[2] = src[2];
michael@0:     dst[3] = 1.0f;
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: unpack<WebGLTexelFormat::R32F, float, float>(const float* __restrict src, float* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0:     dst[1] = src[0];
michael@0:     dst[2] = src[0];
michael@0:     dst[3] = 1.0f;
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: unpack<WebGLTexelFormat::RA32F, float, float>(const float* __restrict src, float* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0:     dst[1] = src[0];
michael@0:     dst[2] = src[0];
michael@0:     dst[3] = src[1];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: unpack<WebGLTexelFormat::A32F, float, float>(const float* __restrict src, float* __restrict dst)
michael@0: {
michael@0:     dst[0] = 0;
michael@0:     dst[1] = 0;
michael@0:     dst[2] = 0;
michael@0:     dst[3] = src[0];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: unpack<WebGLTexelFormat::RGBA16F, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0:     dst[1] = src[1];
michael@0:     dst[2] = src[2];
michael@0:     dst[3] = src[3];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: unpack<WebGLTexelFormat::RGB16F, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0:     dst[1] = src[1];
michael@0:     dst[2] = src[2];
michael@0:     dst[3] = kFloat16Value_One;
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: unpack<WebGLTexelFormat::R16F, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0:     dst[1] = src[0];
michael@0:     dst[2] = src[0];
michael@0:     dst[3] = kFloat16Value_One;
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: unpack<WebGLTexelFormat::RA16F, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0:     dst[1] = src[0];
michael@0:     dst[2] = src[0];
michael@0:     dst[3] = src[1];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: unpack<WebGLTexelFormat::A16F, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = kFloat16Value_Zero;
michael@0:     dst[1] = kFloat16Value_Zero;
michael@0:     dst[2] = kFloat16Value_Zero;
michael@0:     dst[3] = src[0];
michael@0: }
michael@0: 
michael@0: //----------------------------------------------------------------------
michael@0: // Pixel packing routines.
michael@0: //
michael@0: 
michael@0: template<MOZ_ENUM_CLASS_ENUM_TYPE(WebGLTexelFormat) Format,
michael@0:          MOZ_ENUM_CLASS_ENUM_TYPE(WebGLTexelPremultiplicationOp) PremultiplicationOp,
michael@0:          typename SrcType,
michael@0:          typename DstType>
michael@0: MOZ_ALWAYS_INLINE void
michael@0: pack(const SrcType* __restrict src,
michael@0:      DstType* __restrict dst)
michael@0: {
michael@0:     MOZ_ASSERT(false, "Unimplemented texture format conversion");
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::A8, WebGLTexelPremultiplicationOp::None, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[3];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::A8, WebGLTexelPremultiplicationOp::Premultiply, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[3];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::A8, WebGLTexelPremultiplicationOp::Unpremultiply, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[3];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::R8, WebGLTexelPremultiplicationOp::None, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::R8, WebGLTexelPremultiplicationOp::Premultiply, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     float scaleFactor = src[3] / 255.0f;
michael@0:     uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
michael@0:     dst[0] = srcR;
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::R8, WebGLTexelPremultiplicationOp::Unpremultiply, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     float scaleFactor = src[3] ? 255.0f / src[3] : 1.0f;
michael@0:     uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
michael@0:     dst[0] = srcR;
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RA8, WebGLTexelPremultiplicationOp::None, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0:     dst[1] = src[3];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RA8, WebGLTexelPremultiplicationOp::Premultiply, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     float scaleFactor = src[3] / 255.0f;
michael@0:     uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
michael@0:     dst[0] = srcR;
michael@0:     dst[1] = src[3];
michael@0: }
michael@0: 
michael@0: // FIXME: this routine is lossy and must be removed.
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RA8, WebGLTexelPremultiplicationOp::Unpremultiply, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     float scaleFactor = src[3] ? 255.0f / src[3] : 1.0f;
michael@0:     uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
michael@0:     dst[0] = srcR;
michael@0:     dst[1] = src[3];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RGB8, WebGLTexelPremultiplicationOp::None, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0:     dst[1] = src[1];
michael@0:     dst[2] = src[2];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RGB8, WebGLTexelPremultiplicationOp::Premultiply, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     float scaleFactor = src[3] / 255.0f;
michael@0:     uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
michael@0:     uint8_t srcG = static_cast<uint8_t>(src[1] * scaleFactor);
michael@0:     uint8_t srcB = static_cast<uint8_t>(src[2] * scaleFactor);
michael@0:     dst[0] = srcR;
michael@0:     dst[1] = srcG;
michael@0:     dst[2] = srcB;
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RGB8, WebGLTexelPremultiplicationOp::Unpremultiply, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     float scaleFactor = src[3] ? 255.0f / src[3] : 1.0f;
michael@0:     uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
michael@0:     uint8_t srcG = static_cast<uint8_t>(src[1] * scaleFactor);
michael@0:     uint8_t srcB = static_cast<uint8_t>(src[2] * scaleFactor);
michael@0:     dst[0] = srcR;
michael@0:     dst[1] = srcG;
michael@0:     dst[2] = srcB;
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RGBA8, WebGLTexelPremultiplicationOp::None, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0:     dst[1] = src[1];
michael@0:     dst[2] = src[2];
michael@0:     dst[3] = src[3];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RGBA8, WebGLTexelPremultiplicationOp::Premultiply, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     float scaleFactor = src[3] / 255.0f;
michael@0:     uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
michael@0:     uint8_t srcG = static_cast<uint8_t>(src[1] * scaleFactor);
michael@0:     uint8_t srcB = static_cast<uint8_t>(src[2] * scaleFactor);
michael@0:     dst[0] = srcR;
michael@0:     dst[1] = srcG;
michael@0:     dst[2] = srcB;
michael@0:     dst[3] = src[3];
michael@0: }
michael@0: 
michael@0: // FIXME: this routine is lossy and must be removed.
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RGBA8, WebGLTexelPremultiplicationOp::Unpremultiply, uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     float scaleFactor = src[3] ? 255.0f / src[3] : 1.0f;
michael@0:     uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
michael@0:     uint8_t srcG = static_cast<uint8_t>(src[1] * scaleFactor);
michael@0:     uint8_t srcB = static_cast<uint8_t>(src[2] * scaleFactor);
michael@0:     dst[0] = srcR;
michael@0:     dst[1] = srcG;
michael@0:     dst[2] = srcB;
michael@0:     dst[3] = src[3];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RGBA4444, WebGLTexelPremultiplicationOp::None, uint8_t, uint16_t>(const uint8_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     *dst = ( ((src[0] & 0xF0) << 8)
michael@0:            | ((src[1] & 0xF0) << 4)
michael@0:            | (src[2] & 0xF0)
michael@0:            | (src[3] >> 4) );
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RGBA4444, WebGLTexelPremultiplicationOp::Premultiply, uint8_t, uint16_t>(const uint8_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     float scaleFactor = src[3] / 255.0f;
michael@0:     uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
michael@0:     uint8_t srcG = static_cast<uint8_t>(src[1] * scaleFactor);
michael@0:     uint8_t srcB = static_cast<uint8_t>(src[2] * scaleFactor);
michael@0:     *dst = ( ((srcR & 0xF0) << 8)
michael@0:            | ((srcG & 0xF0) << 4)
michael@0:            | (srcB & 0xF0)
michael@0:            | (src[3] >> 4));
michael@0: }
michael@0: 
michael@0: // FIXME: this routine is lossy and must be removed.
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RGBA4444, WebGLTexelPremultiplicationOp::Unpremultiply, uint8_t, uint16_t>(const uint8_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     float scaleFactor = src[3] ? 255.0f / src[3] : 1.0f;
michael@0:     uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
michael@0:     uint8_t srcG = static_cast<uint8_t>(src[1] * scaleFactor);
michael@0:     uint8_t srcB = static_cast<uint8_t>(src[2] * scaleFactor);
michael@0:     *dst = ( ((srcR & 0xF0) << 8)
michael@0:            | ((srcG & 0xF0) << 4)
michael@0:            | (srcB & 0xF0)
michael@0:            | (src[3] >> 4));
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RGBA5551, WebGLTexelPremultiplicationOp::None, uint8_t, uint16_t>(const uint8_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     *dst = ( ((src[0] & 0xF8) << 8)
michael@0:            | ((src[1] & 0xF8) << 3)
michael@0:            | ((src[2] & 0xF8) >> 2)
michael@0:            | (src[3] >> 7));
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RGBA5551, WebGLTexelPremultiplicationOp::Premultiply, uint8_t, uint16_t>(const uint8_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     float scaleFactor = src[3] / 255.0f;
michael@0:     uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
michael@0:     uint8_t srcG = static_cast<uint8_t>(src[1] * scaleFactor);
michael@0:     uint8_t srcB = static_cast<uint8_t>(src[2] * scaleFactor);
michael@0:     *dst = ( ((srcR & 0xF8) << 8)
michael@0:            | ((srcG & 0xF8) << 3)
michael@0:            | ((srcB & 0xF8) >> 2)
michael@0:            | (src[3] >> 7));
michael@0: }
michael@0: 
michael@0: // FIXME: this routine is lossy and must be removed.
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RGBA5551, WebGLTexelPremultiplicationOp::Unpremultiply, uint8_t, uint16_t>(const uint8_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     float scaleFactor = src[3] ? 255.0f / src[3] : 1.0f;
michael@0:     uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
michael@0:     uint8_t srcG = static_cast<uint8_t>(src[1] * scaleFactor);
michael@0:     uint8_t srcB = static_cast<uint8_t>(src[2] * scaleFactor);
michael@0:     *dst = ( ((srcR & 0xF8) << 8)
michael@0:            | ((srcG & 0xF8) << 3)
michael@0:            | ((srcB & 0xF8) >> 2)
michael@0:            | (src[3] >> 7));
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RGB565, WebGLTexelPremultiplicationOp::None, uint8_t, uint16_t>(const uint8_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     *dst = ( ((src[0] & 0xF8) << 8)
michael@0:            | ((src[1] & 0xFC) << 3)
michael@0:            | ((src[2] & 0xF8) >> 3));
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RGB565, WebGLTexelPremultiplicationOp::Premultiply, uint8_t, uint16_t>(const uint8_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     float scaleFactor = src[3] / 255.0f;
michael@0:     uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
michael@0:     uint8_t srcG = static_cast<uint8_t>(src[1] * scaleFactor);
michael@0:     uint8_t srcB = static_cast<uint8_t>(src[2] * scaleFactor);
michael@0:     *dst = ( ((srcR & 0xF8) << 8)
michael@0:            | ((srcG & 0xFC) << 3)
michael@0:            | ((srcB & 0xF8) >> 3));
michael@0: }
michael@0: 
michael@0: // FIXME: this routine is lossy and must be removed.
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RGB565, WebGLTexelPremultiplicationOp::Unpremultiply, uint8_t, uint16_t>(const uint8_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     float scaleFactor = src[3] ? 255.0f / src[3] : 1.0f;
michael@0:     uint8_t srcR = static_cast<uint8_t>(src[0] * scaleFactor);
michael@0:     uint8_t srcG = static_cast<uint8_t>(src[1] * scaleFactor);
michael@0:     uint8_t srcB = static_cast<uint8_t>(src[2] * scaleFactor);
michael@0:     *dst = ( ((srcR & 0xF8) << 8)
michael@0:            | ((srcG & 0xFC) << 3)
michael@0:            | ((srcB & 0xF8) >> 3));
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RGB32F, WebGLTexelPremultiplicationOp::None, float, float>(const float* __restrict src, float* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0:     dst[1] = src[1];
michael@0:     dst[2] = src[2];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RGB32F, WebGLTexelPremultiplicationOp::Premultiply, float, float>(const float* __restrict src, float* __restrict dst)
michael@0: {
michael@0:     float scaleFactor = src[3];
michael@0:     dst[0] = src[0] * scaleFactor;
michael@0:     dst[1] = src[1] * scaleFactor;
michael@0:     dst[2] = src[2] * scaleFactor;
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RGBA32F, WebGLTexelPremultiplicationOp::None, float, float>(const float* __restrict src, float* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0:     dst[1] = src[1];
michael@0:     dst[2] = src[2];
michael@0:     dst[3] = src[3];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RGBA32F, WebGLTexelPremultiplicationOp::Premultiply, float, float>(const float* __restrict src, float* __restrict dst)
michael@0: {
michael@0:     float scaleFactor = src[3];
michael@0:     dst[0] = src[0] * scaleFactor;
michael@0:     dst[1] = src[1] * scaleFactor;
michael@0:     dst[2] = src[2] * scaleFactor;
michael@0:     dst[3] = src[3];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::A32F, WebGLTexelPremultiplicationOp::None, float, float>(const float* __restrict src, float* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[3];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::A32F, WebGLTexelPremultiplicationOp::Premultiply, float, float>(const float* __restrict src, float* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[3];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::R32F, WebGLTexelPremultiplicationOp::None, float, float>(const float* __restrict src, float* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::R32F, WebGLTexelPremultiplicationOp::Premultiply, float, float>(const float* __restrict src, float* __restrict dst)
michael@0: {
michael@0:     float scaleFactor = src[3];
michael@0:     dst[0] = src[0] * scaleFactor;
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RA32F, WebGLTexelPremultiplicationOp::None, float, float>(const float* __restrict src, float* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0:     dst[1] = src[3];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RA32F, WebGLTexelPremultiplicationOp::Premultiply, float, float>(const float* __restrict src, float* __restrict dst)
michael@0: {
michael@0:     float scaleFactor = src[3];
michael@0:     dst[0] = src[0] * scaleFactor;
michael@0:     dst[1] = scaleFactor;
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RGB16F, WebGLTexelPremultiplicationOp::None, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0:     dst[1] = src[1];
michael@0:     dst[2] = src[2];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RGB16F, WebGLTexelPremultiplicationOp::Premultiply, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     float scaleFactor = unpackFromFloat16(src[3]);
michael@0:     dst[0] = packToFloat16(unpackFromFloat16(src[0]) * scaleFactor);
michael@0:     dst[1] = packToFloat16(unpackFromFloat16(src[1]) * scaleFactor);
michael@0:     dst[2] = packToFloat16(unpackFromFloat16(src[2]) * scaleFactor);
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RGBA16F, WebGLTexelPremultiplicationOp::None, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0:     dst[1] = src[1];
michael@0:     dst[2] = src[2];
michael@0:     dst[3] = src[3];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RGBA16F, WebGLTexelPremultiplicationOp::Premultiply, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     float scaleFactor = unpackFromFloat16(src[3]);
michael@0:     dst[0] = packToFloat16(unpackFromFloat16(src[0]) * scaleFactor);
michael@0:     dst[1] = packToFloat16(unpackFromFloat16(src[1]) * scaleFactor);
michael@0:     dst[2] = packToFloat16(unpackFromFloat16(src[2]) * scaleFactor);
michael@0:     dst[3] = src[3];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::A16F, WebGLTexelPremultiplicationOp::None, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[3];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::A16F, WebGLTexelPremultiplicationOp::Premultiply, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[3];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::R16F, WebGLTexelPremultiplicationOp::None, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::R16F, WebGLTexelPremultiplicationOp::Premultiply, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     float scaleFactor = unpackFromFloat16(src[3]);
michael@0:     dst[0] = packToFloat16(unpackFromFloat16(src[0]) * scaleFactor);
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RA16F, WebGLTexelPremultiplicationOp::None, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0:     dst[1] = src[3];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: pack<WebGLTexelFormat::RA16F, WebGLTexelPremultiplicationOp::Premultiply, uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     float scaleFactor = unpackFromFloat16(src[3]);
michael@0:     dst[0] = packToFloat16(unpackFromFloat16(src[0]) * scaleFactor);
michael@0:     dst[1] = scaleFactor;
michael@0: }
michael@0: 
michael@0: /****** END CODE SHARED WITH WEBKIT ******/
michael@0: 
michael@0: template<typename SrcType, typename DstType> MOZ_ALWAYS_INLINE void
michael@0: convertType(const SrcType* __restrict src, DstType* __restrict dst)
michael@0: {
michael@0:     MOZ_ASSERT(false, "Unimplemented texture format conversion");
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: convertType<uint8_t, uint8_t>(const uint8_t* __restrict src, uint8_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0:     dst[1] = src[1];
michael@0:     dst[2] = src[2];
michael@0:     dst[3] = src[3];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: convertType<uint16_t, uint16_t>(const uint16_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0:     dst[1] = src[1];
michael@0:     dst[2] = src[2];
michael@0:     dst[3] = src[3];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: convertType<float, float>(const float* __restrict src, float* __restrict dst)
michael@0: {
michael@0:     dst[0] = src[0];
michael@0:     dst[1] = src[1];
michael@0:     dst[2] = src[2];
michael@0:     dst[3] = src[3];
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: convertType<uint8_t, float>(const uint8_t* __restrict src, float* __restrict dst)
michael@0: {
michael@0:     const float scaleFactor = 1.f / 255.0f;
michael@0:     dst[0] = src[0] * scaleFactor;
michael@0:     dst[1] = src[1] * scaleFactor;
michael@0:     dst[2] = src[2] * scaleFactor;
michael@0:     dst[3] = src[3] * scaleFactor;
michael@0: }
michael@0: 
michael@0: template<> MOZ_ALWAYS_INLINE void
michael@0: convertType<uint8_t, uint16_t>(const uint8_t* __restrict src, uint16_t* __restrict dst)
michael@0: {
michael@0:     const float scaleFactor = 1.f / 255.0f;
michael@0:     dst[0] = packToFloat16(src[0] * scaleFactor);
michael@0:     dst[1] = packToFloat16(src[1] * scaleFactor);
michael@0:     dst[2] = packToFloat16(src[2] * scaleFactor);
michael@0:     dst[3] = packToFloat16(src[3] * scaleFactor);
michael@0: }
michael@0: 
michael@0: } // end namespace WebGLTexelConversions
michael@0: 
michael@0: } // end namespace mozilla
michael@0: 
michael@0: #endif // WEBGLTEXELCONVERSIONS_H_