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Diffstat (limited to 'src/3rdparty/angle/src/libGLESv2/renderer/generatemip.h')
| -rw-r--r-- | src/3rdparty/angle/src/libGLESv2/renderer/generatemip.h | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/libGLESv2/renderer/generatemip.h b/src/3rdparty/angle/src/libGLESv2/renderer/generatemip.h new file mode 100644 index 0000000000..8e1973605b --- /dev/null +++ b/src/3rdparty/angle/src/libGLESv2/renderer/generatemip.h @@ -0,0 +1,203 @@ +// +// Copyright (c) 2002-2012 The ANGLE Project Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. +// + +// generatemip.h: Defines the GenerateMip function, templated on the format +// type of the image for which mip levels are being generated. + +#ifndef LIBGLESV2_RENDERER_GENERATEMIP_H_ +#define LIBGLESV2_RENDERER_GENERATEMIP_H_ + +#include "libGLESv2/mathutil.h" + +namespace rx +{ +struct L8 +{ + unsigned char L; + + static void average(L8 *dst, const L8 *src1, const L8 *src2) + { + dst->L = ((src1->L ^ src2->L) >> 1) + (src1->L & src2->L); + } +}; + +typedef L8 R8; // R8 type is functionally equivalent for mip purposes +typedef L8 A8; // A8 type is functionally equivalent for mip purposes + +struct A8L8 +{ + unsigned char L; + unsigned char A; + + static void average(A8L8 *dst, const A8L8 *src1, const A8L8 *src2) + { + *(unsigned short*)dst = (((*(unsigned short*)src1 ^ *(unsigned short*)src2) & 0xFEFE) >> 1) + (*(unsigned short*)src1 & *(unsigned short*)src2); + } +}; + +typedef A8L8 R8G8; // R8G8 type is functionally equivalent for mip purposes + +struct A8R8G8B8 +{ + unsigned char B; + unsigned char G; + unsigned char R; + unsigned char A; + + static void average(A8R8G8B8 *dst, const A8R8G8B8 *src1, const A8R8G8B8 *src2) + { + *(unsigned int*)dst = (((*(unsigned int*)src1 ^ *(unsigned int*)src2) & 0xFEFEFEFE) >> 1) + (*(unsigned int*)src1 & *(unsigned int*)src2); + } +}; + +typedef A8R8G8B8 R8G8B8A8; // R8G8B8A8 type is functionally equivalent for mip purposes + +struct A16B16G16R16F +{ + unsigned short R; + unsigned short G; + unsigned short B; + unsigned short A; + + static void average(A16B16G16R16F *dst, const A16B16G16R16F *src1, const A16B16G16R16F *src2) + { + dst->R = gl::float32ToFloat16((gl::float16ToFloat32(src1->R) + gl::float16ToFloat32(src2->R)) * 0.5f); + dst->G = gl::float32ToFloat16((gl::float16ToFloat32(src1->G) + gl::float16ToFloat32(src2->G)) * 0.5f); + dst->B = gl::float32ToFloat16((gl::float16ToFloat32(src1->B) + gl::float16ToFloat32(src2->B)) * 0.5f); + dst->A = gl::float32ToFloat16((gl::float16ToFloat32(src1->A) + gl::float16ToFloat32(src2->A)) * 0.5f); + } +}; + +struct R16F +{ + unsigned short R; + + static void average(R16F *dst, const R16F *src1, const R16F *src2) + { + dst->R = gl::float32ToFloat16((gl::float16ToFloat32(src1->R) + gl::float16ToFloat32(src2->R)) * 0.5f); + } +}; + +struct R16G16F +{ + unsigned short R; + unsigned short G; + + static void average(R16G16F *dst, const R16G16F *src1, const R16G16F *src2) + { + dst->R = gl::float32ToFloat16((gl::float16ToFloat32(src1->R) + gl::float16ToFloat32(src2->R)) * 0.5f); + dst->G = gl::float32ToFloat16((gl::float16ToFloat32(src1->G) + gl::float16ToFloat32(src2->G)) * 0.5f); + } +}; + +struct A32B32G32R32F +{ + float R; + float G; + float B; + float A; + + static void average(A32B32G32R32F *dst, const A32B32G32R32F *src1, const A32B32G32R32F *src2) + { + dst->R = (src1->R + src2->R) * 0.5f; + dst->G = (src1->G + src2->G) * 0.5f; + dst->B = (src1->B + src2->B) * 0.5f; + dst->A = (src1->A + src2->A) * 0.5f; + } +}; + +struct R32F +{ + float R; + + static void average(R32F *dst, const R32F *src1, const R32F *src2) + { + dst->R = (src1->R + src2->R) * 0.5f; + } +}; + +struct R32G32F +{ + float R; + float G; + + static void average(R32G32F *dst, const R32G32F *src1, const R32G32F *src2) + { + dst->R = (src1->R + src2->R) * 0.5f; + dst->G = (src1->G + src2->G) * 0.5f; + } +}; + +struct R32G32B32F +{ + float R; + float G; + float B; + + static void average(R32G32B32F *dst, const R32G32B32F *src1, const R32G32B32F *src2) + { + dst->R = (src1->R + src2->R) * 0.5f; + dst->G = (src1->G + src2->G) * 0.5f; + dst->B = (src1->B + src2->B) * 0.5f; + } +}; + +template <typename T> +static void GenerateMip(unsigned int sourceWidth, unsigned int sourceHeight, + const unsigned char *sourceData, int sourcePitch, + unsigned char *destData, int destPitch) +{ + unsigned int mipWidth = std::max(1U, sourceWidth >> 1); + unsigned int mipHeight = std::max(1U, sourceHeight >> 1); + + if (sourceHeight == 1) + { + ASSERT(sourceWidth != 1); + + const T *src = (const T*)sourceData; + T *dst = (T*)destData; + + for (unsigned int x = 0; x < mipWidth; x++) + { + T::average(&dst[x], &src[x * 2], &src[x * 2 + 1]); + } + } + else if (sourceWidth == 1) + { + ASSERT(sourceHeight != 1); + + for (unsigned int y = 0; y < mipHeight; y++) + { + const T *src0 = (const T*)(sourceData + y * 2 * sourcePitch); + const T *src1 = (const T*)(sourceData + y * 2 * sourcePitch + sourcePitch); + T *dst = (T*)(destData + y * destPitch); + + T::average(dst, src0, src1); + } + } + else + { + for (unsigned int y = 0; y < mipHeight; y++) + { + const T *src0 = (const T*)(sourceData + y * 2 * sourcePitch); + const T *src1 = (const T*)(sourceData + y * 2 * sourcePitch + sourcePitch); + T *dst = (T*)(destData + y * destPitch); + + for (unsigned int x = 0; x < mipWidth; x++) + { + T tmp0; + T tmp1; + + T::average(&tmp0, &src0[x * 2], &src0[x * 2 + 1]); + T::average(&tmp1, &src1[x * 2], &src1[x * 2 + 1]); + T::average(&dst[x], &tmp0, &tmp1); + } + } + } +} +} + +#endif // LIBGLESV2_RENDERER_GENERATEMIP_H_ |