388 lines
9.5 KiB
C++
388 lines
9.5 KiB
C++
/*-------------------------------------------------------------------------
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NeoPixel library
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Written by Michael C. Miller.
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I invest time and resources providing this open source code,
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please support me by dontating (see https://github.com/Makuna/NeoPixelBus)
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-------------------------------------------------------------------------
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This file is part of the Makuna/NeoPixelBus library.
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NeoPixelBus is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation, either version 3 of
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the License, or (at your option) any later version.
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NeoPixelBus is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with NeoPixel. If not, see
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<http://www.gnu.org/licenses/>.
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-------------------------------------------------------------------------*/
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#pragma once
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const uint16_t c_BitmapFileId = 0x4d42; // "BM"
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#pragma pack(push, 2)
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struct BitmapFileHeader
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{
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uint16_t FileId; // only c_BitmapFileId is supported
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uint32_t FileSize;
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uint16_t Reserved0;
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uint16_t Reserved1;
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uint32_t PixelAddress;
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};
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struct BitmapInfoHeader
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{
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uint32_t Size;
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int32_t Width;
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int32_t Height;
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uint16_t Planes; // only support 1
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uint16_t BitsPerPixel; // only support 24 and 32
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uint32_t Compression; // only support BI_Rgb
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uint32_t RawDateSize; // can be zero
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int32_t XPpm;
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int32_t YPpm;
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uint32_t PaletteLength;
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uint32_t ImportantColorCount;
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};
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#pragma pack(pop)
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enum BmpCompression
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{
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BI_Rgb,
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BI_Rle8,
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BI_Rle4,
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BI_Bitfields,
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BI_Jpeg,
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BI_Png,
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BI_AlphaBitfields,
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BI_Cmyk = 11,
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BI_CmykRle8,
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BI_CmykRle4
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};
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template<typename T_COLOR_FEATURE, typename T_FILE_METHOD> class NeoBitmapFile
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{
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public:
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NeoBitmapFile() :
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_fileAddressPixels(0),
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_width(0),
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_height(0),
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_sizeRow(0),
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_bytesPerPixel(0),
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_bottomToTop(true)
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{
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}
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~NeoBitmapFile()
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{
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_file.close();
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}
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bool Begin(T_FILE_METHOD file)
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{
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if (_file)
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{
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_file.close();
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}
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if (!file || !file.seek(0))
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{
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goto error;
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}
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_file = file;
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BitmapFileHeader bmpHeader;
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BitmapInfoHeader bmpInfoHeader;
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size_t result;
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result = _file.read((uint8_t*)(&bmpHeader), sizeof(bmpHeader));
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if (result != sizeof(bmpHeader) ||
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bmpHeader.FileId != c_BitmapFileId ||
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bmpHeader.FileSize != _file.size())
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{
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goto error;
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}
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result = _file.read((uint8_t*)(&bmpInfoHeader), sizeof(bmpInfoHeader));
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if (result != sizeof(bmpInfoHeader) ||
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result != bmpInfoHeader.Size ||
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1 != bmpInfoHeader.Planes ||
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BI_Rgb != bmpInfoHeader.Compression)
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{
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goto error;
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}
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if (!(24 == bmpInfoHeader.BitsPerPixel ||
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32 == bmpInfoHeader.BitsPerPixel))
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{
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goto error;
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}
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// save the interesting information
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_width = abs(bmpInfoHeader.Width);
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_height = abs(bmpInfoHeader.Height);
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_fileAddressPixels = bmpHeader.PixelAddress;
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// negative height means rows are top to bottom
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_bottomToTop = (bmpInfoHeader.Height > 0);
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// rows are 32 bit aligned so they may have padding on each row
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_sizeRow = (bmpInfoHeader.BitsPerPixel * _width + 31) / 32 * 4;
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_bytesPerPixel = bmpInfoHeader.BitsPerPixel / 8;
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return true;
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error:
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_fileAddressPixels = 0;
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_width = 0;
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_height = 0;
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_sizeRow = 0;
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_bytesPerPixel = 0;
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_file.close();
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return false;
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};
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size_t PixelSize() const
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{
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return T_COLOR_FEATURE::PixelSize;
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};
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uint16_t PixelCount() const
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{
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return _width * _height;
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};
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uint16_t Width() const
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{
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return _width;
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};
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uint16_t Height() const
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{
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return _height;
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};
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typename T_COLOR_FEATURE::ColorObject GetPixelColor(int16_t x, int16_t y)
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{
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if (x < 0 || x >= _width || y < 0 || y >= _height)
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{
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// Pixel # is out of bounds, this will get converted to a
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// color object type initialized to 0 (black)
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return 0;
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}
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typename T_COLOR_FEATURE::ColorObject color;
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if (!seek(x, y) || !readPixel(&color))
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{
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return 0;
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}
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return color;
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};
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template <typename T_SHADER> void Render(NeoBufferContext<T_COLOR_FEATURE> destBuffer,
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T_SHADER& shader,
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uint16_t indexPixel,
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int16_t xSrc,
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int16_t ySrc,
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int16_t wSrc)
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{
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const uint16_t destPixelCount = destBuffer.PixelCount();
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typename T_COLOR_FEATURE::ColorObject color(0);
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xSrc = constrainX(xSrc);
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ySrc = constrainY(ySrc);
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if (seek(xSrc, ySrc))
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{
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for (int16_t x = 0; x < wSrc && indexPixel < destPixelCount; x++, indexPixel++)
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{
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if (static_cast<uint16_t>(xSrc) < _width)
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{
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if (readPixel(&color))
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{
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color = shader.Apply(indexPixel, color);
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xSrc++;
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}
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}
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T_COLOR_FEATURE::applyPixelColor(destBuffer.Pixels, indexPixel, color);
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}
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}
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}
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void Blt(NeoBufferContext<T_COLOR_FEATURE> destBuffer,
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uint16_t indexPixel,
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int16_t xSrc,
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int16_t ySrc,
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int16_t wSrc)
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{
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NeoShaderNop<typename T_COLOR_FEATURE::ColorObject> shaderNop;
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Render<NeoShaderNop<typename T_COLOR_FEATURE::ColorObject>>(destBuffer, shaderNop, indexPixel, xSrc, ySrc, wSrc);
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};
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template <typename T_SHADER> void Render(NeoBufferContext<T_COLOR_FEATURE> destBuffer,
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T_SHADER& shader,
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int16_t xDest,
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int16_t yDest,
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int16_t xSrc,
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int16_t ySrc,
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int16_t wSrc,
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int16_t hSrc,
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LayoutMapCallback layoutMap)
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{
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const uint16_t destPixelCount = destBuffer.PixelCount();
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typename T_COLOR_FEATURE::ColorObject color(0);
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for (int16_t y = 0; y < hSrc; y++)
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{
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int16_t xFile = constrainX(xSrc);
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int16_t yFile = constrainY(ySrc + y);
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if (seek(xFile, yFile))
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{
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for (int16_t x = 0; x < wSrc; x++)
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{
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uint16_t indexDest = layoutMap(xDest + x, yDest + y);
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if (static_cast<uint16_t>(xFile) < _width)
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{
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if (readPixel(&color))
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{
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color = shader.Apply(indexDest, color);
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xFile++;
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}
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}
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if (indexDest < destPixelCount)
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{
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T_COLOR_FEATURE::applyPixelColor(destBuffer.Pixels, indexDest, color);
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}
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}
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}
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}
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};
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void Blt(NeoBufferContext<T_COLOR_FEATURE> destBuffer,
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int16_t xDest,
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int16_t yDest,
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int16_t xSrc,
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int16_t ySrc,
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int16_t wSrc,
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int16_t hSrc,
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LayoutMapCallback layoutMap)
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{
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NeoShaderNop<typename T_COLOR_FEATURE::ColorObject> shaderNop;
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Render<NeoShaderNop<typename T_COLOR_FEATURE::ColorObject>>(destBuffer,
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shaderNop,
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xDest,
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yDest,
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xSrc,
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ySrc,
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wSrc,
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hSrc,
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layoutMap);
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};
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private:
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T_FILE_METHOD _file;
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uint32_t _fileAddressPixels;
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uint16_t _width;
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uint16_t _height;
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uint32_t _sizeRow;
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uint8_t _bytesPerPixel;
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bool _bottomToTop;
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int16_t constrainX(int16_t x) const
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{
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if (x < 0)
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{
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x = 0;
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}
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else if (static_cast<uint16_t>(x) >= _width)
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{
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x = _width - 1;
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}
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return x;
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};
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int16_t constrainY(int16_t y) const
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{
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if (y < 0)
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{
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y = 0;
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}
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else if (static_cast<uint16_t>(y) >= _height)
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{
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y = _height - 1;
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}
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return y;
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};
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bool seek(int16_t x, int16_t y)
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{
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if (_bottomToTop)
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{
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y = (_height - 1) - y;
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}
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uint32_t pos = y * _sizeRow + x * _bytesPerPixel;
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pos += _fileAddressPixels;
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return _file.seek(pos);
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};
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bool readPixel(RgbColor* color)
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{
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uint8_t bgr[4];
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int result;
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result = _file.read(bgr, _bytesPerPixel);
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if (result != _bytesPerPixel)
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{
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*color = 0;
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return false;
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}
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color->B = bgr[0];
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color->G = bgr[1];
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color->R = bgr[2];
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return true;
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};
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bool readPixel(RgbwColor* color)
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{
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uint8_t bgr[4];
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int result;
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bgr[3] = 0; // init white channel as read maybe only 3 bytes
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result = _file.read(bgr, _bytesPerPixel);
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if (result != _bytesPerPixel)
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{
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*color = 0;
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return false;
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}
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color->B = bgr[0];
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color->G = bgr[1];
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color->R = bgr[2];
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color->W = bgr[3];
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return true;
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};
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}; |