46 lines
1.6 KiB
C++
46 lines
1.6 KiB
C++
#pragma once
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namespace nall { namespace Encode {
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struct BMP {
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static auto create(const string& filename, const uint32_t* data, unsigned width, unsigned height, bool alpha) -> bool {
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file fp{filename, file::mode::write};
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if(!fp) return false;
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unsigned bitsPerPixel = alpha ? 32 : 24;
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unsigned bytesPerPixel = bitsPerPixel / 8;
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unsigned alignedWidth = width * bytesPerPixel;
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unsigned paddingLength = 0;
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unsigned imageSize = alignedWidth * height;
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unsigned fileSize = 0x36 + imageSize;
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while(alignedWidth % 4) alignedWidth++, paddingLength++;
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fp.writel(0x4d42, 2); //signature
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fp.writel(fileSize, 4); //file size
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fp.writel(0, 2); //reserved
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fp.writel(0, 2); //reserved
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fp.writel(0x36, 4); //offset
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fp.writel(40, 4); //DIB size
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fp.writel(width, 4); //width
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fp.writel(-height, 4); //height
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fp.writel(1, 2); //color planes
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fp.writel(bitsPerPixel, 2); //bits per pixel
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fp.writel(0, 4); //compression method (BI_RGB)
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fp.writel(imageSize, 4); //image data size
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fp.writel(3780, 4); //horizontal resolution
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fp.writel(3780, 4); //vertical resolution
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fp.writel(0, 4); //palette size
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fp.writel(0, 4); //important color count
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for(auto y : range(height)) {
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const uint32_t* p = data + y * width;
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for(auto x : range(width)) fp.writel(*p++, bytesPerPixel);
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if(paddingLength) fp.writel(0, paddingLength);
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}
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return true;
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}
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};
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}}
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