mirror of
https://github.com/RetroDECK/Supermodel.git
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116 lines
2.9 KiB
C++
116 lines
2.9 KiB
C++
#include "Util/BMPFile.h"
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#include "OSD/Logger.h"
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#include <memory>
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#include <cstdio>
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namespace Util
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{
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#pragma pack(push, 1)
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struct BMPHeader
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{
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uint8_t id[2];
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uint32_t file_size;
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uint16_t reserved1;
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uint16_t reserved2;
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uint32_t bitmap_offset;
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BMPHeader(uint32_t _file_size, uint32_t _bitmap_offset)
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: file_size(_file_size),
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reserved1(0),
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reserved2(0),
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bitmap_offset(_bitmap_offset)
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{
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id[0] = 'B';
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id[1] = 'M';
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}
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};
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struct BMPInfoHeader
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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 num_planes;
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uint16_t bits_per_pixel;
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uint32_t compression_method;
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uint32_t bitmap_size;
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int32_t horizontal_resolution;
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int32_t vertical_resolution;
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uint32_t num_palette_colors;
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uint32_t num_important_colors;
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BMPInfoHeader(int32_t _width, int32_t _height)
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: size(sizeof(BMPInfoHeader)),
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width(_width),
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height(_height),
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num_planes(1),
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bits_per_pixel(24),
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compression_method(0),
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bitmap_size(_width*_height*3),
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horizontal_resolution(2835), // 72 dpi
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vertical_resolution(2835),
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num_palette_colors(0),
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num_important_colors(0)
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{}
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};
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struct FileHeader
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{
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BMPHeader bmp_header;
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BMPInfoHeader bmp_info_header;
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FileHeader(int32_t width, int32_t height)
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: bmp_header(sizeof(FileHeader) + width*height*3, sizeof(FileHeader)),
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bmp_info_header(width, height)
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{}
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};
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#pragma pack(pop)
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bool WriteRGBA8SurfaceToBMP(const std::string &file_name, const uint8_t *pixels, int32_t width, int32_t height, bool flip_vertical)
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{
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size_t file_size = sizeof(FileHeader) + width*height*3;
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std::shared_ptr<uint8_t> file(new uint8_t[file_size], std::default_delete<uint8_t[]>());
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FileHeader *header = new (file.get()) FileHeader(width, height);
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uint8_t *bmp = file.get() + sizeof(*header);
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if (!flip_vertical)
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{
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for (int32_t y = height - 1; y >= 0; y--)
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{
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const uint8_t *src = &pixels[y*width*4];
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for (int32_t x = 0; x < width; x++)
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{
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*bmp++ = src[2]; // b
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*bmp++ = src[1]; // g
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*bmp++ = src[0]; // r
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src += 4;
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}
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}
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}
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else
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{
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for (int32_t y = 0; y < height; y++)
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{
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const uint8_t *src = &pixels[y*width*4];
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for (int32_t x = 0; x < width; x++)
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{
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*bmp++ = src[2]; // b
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*bmp++ = src[1]; // g
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*bmp++ = src[0]; // r
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src += 4;
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}
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}
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}
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FILE *fp = fopen(file_name.c_str(), "wb");
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if (fp)
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{
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fwrite(file.get(), sizeof(uint8_t), file_size, fp);
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fclose(fp);
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}
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else
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{
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ErrorLog("Unable to open '%s' for writing.", file_name.c_str());
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return true;
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}
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return false;
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}
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} // Util
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