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//
// Copyright (c) 2014 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.
//
#include "common/mathutil.h"
namespace rx
{
template <typename T>
inline T *OffsetDataPointer(uint8_t *data, size_t y, size_t z, size_t rowPitch, size_t depthPitch)
{
return reinterpret_cast<T*>(data + (y * rowPitch) + (z * depthPitch));
}
template <typename T>
inline const T *OffsetDataPointer(const uint8_t *data, size_t y, size_t z, size_t rowPitch, size_t depthPitch)
{
return reinterpret_cast<const T*>(data + (y * rowPitch) + (z * depthPitch));
}
template <typename type, size_t componentCount>
inline void LoadToNative(size_t width, size_t height, size_t depth,
const uint8_t *input, size_t inputRowPitch, size_t inputDepthPitch,
uint8_t *output, size_t outputRowPitch, size_t outputDepthPitch)
{
const size_t rowSize = width * sizeof(type) * componentCount;
const size_t layerSize = rowSize * height;
const size_t imageSize = layerSize * depth;
if (layerSize == inputDepthPitch && layerSize == outputDepthPitch)
{
ASSERT(rowSize == inputRowPitch && rowSize == outputRowPitch);
memcpy(output, input, imageSize);
}
else if (rowSize == inputRowPitch && rowSize == outputRowPitch)
{
for (size_t z = 0; z < depth; z++)
{
const type *source = OffsetDataPointer<type>(input, 0, z, inputRowPitch, inputDepthPitch);
type *dest = OffsetDataPointer<type>(output, 0, z, outputRowPitch, outputDepthPitch);
memcpy(dest, source, layerSize);
}
}
else
{
for (size_t z = 0; z < depth; z++)
{
for (size_t y = 0; y < height; y++)
{
const type *source = OffsetDataPointer<type>(input, y, z, inputRowPitch, inputDepthPitch);
type *dest = OffsetDataPointer<type>(output, y, z, outputRowPitch, outputDepthPitch);
memcpy(dest, source, width * sizeof(type) * componentCount);
}
}
}
}
template <typename type, uint32_t fourthComponentBits>
inline void LoadToNative3To4(size_t width, size_t height, size_t depth,
const uint8_t *input, size_t inputRowPitch, size_t inputDepthPitch,
uint8_t *output, size_t outputRowPitch, size_t outputDepthPitch)
{
const type fourthValue = gl::bitCast<type>(fourthComponentBits);
for (size_t z = 0; z < depth; z++)
{
for (size_t y = 0; y < height; y++)
{
const type *source = OffsetDataPointer<type>(input, y, z, inputRowPitch, inputDepthPitch);
type *dest = OffsetDataPointer<type>(output, y, z, outputRowPitch, outputDepthPitch);
for (size_t x = 0; x < width; x++)
{
dest[x * 4 + 0] = source[x * 3 + 0];
dest[x * 4 + 1] = source[x * 3 + 1];
dest[x * 4 + 2] = source[x * 3 + 2];
dest[x * 4 + 3] = fourthValue;
}
}
}
}
template <size_t componentCount>
inline void Load32FTo16F(size_t width, size_t height, size_t depth,
const uint8_t *input, size_t inputRowPitch, size_t inputDepthPitch,
uint8_t *output, size_t outputRowPitch, size_t outputDepthPitch)
{
const size_t elementWidth = componentCount * width;
for (size_t z = 0; z < depth; z++)
{
for (size_t y = 0; y < height; y++)
{
const float *source = OffsetDataPointer<float>(input, y, z, inputRowPitch, inputDepthPitch);
uint16_t *dest = OffsetDataPointer<uint16_t>(output, y, z, outputRowPitch, outputDepthPitch);
for (size_t x = 0; x < elementWidth; x++)
{
dest[x] = gl::float32ToFloat16(source[x]);
}
}
}
}
template <size_t blockWidth, size_t blockHeight, size_t blockSize>
inline void LoadCompressedToNative(size_t width, size_t height, size_t depth,
const uint8_t *input, size_t inputRowPitch, size_t inputDepthPitch,
uint8_t *output, size_t outputRowPitch, size_t outputDepthPitch)
{
const size_t columns = (width + (blockWidth - 1)) / blockWidth;
const size_t rows = (height + (blockHeight - 1)) / blockHeight;
for (size_t z = 0; z < depth; ++z)
{
for (size_t y = 0; y < rows; ++y)
{
const uint8_t *source = OffsetDataPointer<uint8_t>(input, y, z, inputRowPitch, inputDepthPitch);
uint8_t *dest = OffsetDataPointer<uint8_t>(output, y, z, outputRowPitch, outputDepthPitch);
memcpy(dest, source, columns * blockSize);
}
}
}
template <typename type, uint32_t firstBits, uint32_t secondBits, uint32_t thirdBits, uint32_t fourthBits>
inline void Initialize4ComponentData(size_t width, size_t height, size_t depth,
uint8_t *output, size_t outputRowPitch, size_t outputDepthPitch)
{
type writeValues[4] =
{
gl::bitCast<type>(firstBits),
gl::bitCast<type>(secondBits),
gl::bitCast<type>(thirdBits),
gl::bitCast<type>(fourthBits),
};
for (size_t z = 0; z < depth; z++)
{
for (size_t y = 0; y < height; y++)
{
type *destRow = OffsetDataPointer<type>(output, y, z, outputRowPitch, outputDepthPitch);
for (size_t x = 0; x < width; x++)
{
type* destPixel = destRow + x * 4;
// This could potentially be optimized by generating an entire row of initialization
// data and copying row by row instead of pixel by pixel.
memcpy(destPixel, writeValues, sizeof(type) * 4);
}
}
}
}
}
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