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#define _CRT_SECURE_NO_WARNINGS
#include "save-bmp.h"
#include <cstdio>
#ifdef MSDFGEN_USE_CPP11
#include <cstdint>
#else
typedef int int32_t;
typedef unsigned uint32_t;
typedef unsigned short uint16_t;
typedef unsigned char uint8_t;
#endif
#include "pixel-conversion.hpp"
namespace msdfgen {
template <typename T>
static bool writeValue(FILE *file, T value) {
#ifdef __BIG_ENDIAN__
T reverse = 0;
for (int i = 0; i < sizeof(T); ++i) {
reverse <<= 8;
reverse |= value&T(0xff);
value >>= 8;
}
return fwrite(&reverse, sizeof(T), 1, file) == 1;
#else
return fwrite(&value, sizeof(T), 1, file) == 1;
#endif
}
static bool writeBmpHeader(FILE *file, int width, int height, int &paddedWidth) {
paddedWidth = (3*width+3)&~3;
const uint32_t bitmapStart = 54;
const uint32_t bitmapSize = paddedWidth*height;
const uint32_t fileSize = bitmapStart+bitmapSize;
writeValue<uint16_t>(file, 0x4d42u);
writeValue<uint32_t>(file, fileSize);
writeValue<uint16_t>(file, 0);
writeValue<uint16_t>(file, 0);
writeValue<uint32_t>(file, bitmapStart);
writeValue<uint32_t>(file, 40);
writeValue<int32_t>(file, width);
writeValue<int32_t>(file, height);
writeValue<uint16_t>(file, 1);
writeValue<uint16_t>(file, 24);
writeValue<uint32_t>(file, 0);
writeValue<uint32_t>(file, bitmapSize);
writeValue<uint32_t>(file, 2835);
writeValue<uint32_t>(file, 2835);
writeValue<uint32_t>(file, 0);
writeValue<uint32_t>(file, 0);
return true;
}
bool saveBmp(const BitmapConstRef<byte, 1> &bitmap, const char *filename) {
FILE *file = fopen(filename, "wb");
if (!file)
return false;
int paddedWidth;
writeBmpHeader(file, bitmap.width, bitmap.height, paddedWidth);
const uint8_t padding[4] = { };
int padLength = paddedWidth-3*bitmap.width;
for (int y = 0; y < bitmap.height; ++y) {
for (int x = 0; x < bitmap.width; ++x) {
uint8_t px = (uint8_t) *bitmap(x, y);
fwrite(&px, sizeof(uint8_t), 1, file);
fwrite(&px, sizeof(uint8_t), 1, file);
fwrite(&px, sizeof(uint8_t), 1, file);
}
fwrite(padding, 1, padLength, file);
}
return !fclose(file);
}
bool saveBmp(const BitmapConstRef<byte, 3> &bitmap, const char *filename) {
FILE *file = fopen(filename, "wb");
if (!file)
return false;
int paddedWidth;
writeBmpHeader(file, bitmap.width, bitmap.height, paddedWidth);
const uint8_t padding[4] = { };
int padLength = paddedWidth-3*bitmap.width;
for (int y = 0; y < bitmap.height; ++y) {
for (int x = 0; x < bitmap.width; ++x) {
uint8_t bgr[3] = {
(uint8_t) bitmap(x, y)[2],
(uint8_t) bitmap(x, y)[1],
(uint8_t) bitmap(x, y)[0]
};
fwrite(bgr, sizeof(uint8_t), 3, file);
}
fwrite(padding, 1, padLength, file);
}
return !fclose(file);
}
bool saveBmp(const BitmapConstRef<byte, 4> &bitmap, const char *filename) {
// RGBA not supported by the BMP format
return false;
}
bool saveBmp(const BitmapConstRef<float, 1> &bitmap, const char *filename) {
FILE *file = fopen(filename, "wb");
if (!file)
return false;
int paddedWidth;
writeBmpHeader(file, bitmap.width, bitmap.height, paddedWidth);
const uint8_t padding[4] = { };
int padLength = paddedWidth-3*bitmap.width;
for (int y = 0; y < bitmap.height; ++y) {
for (int x = 0; x < bitmap.width; ++x) {
uint8_t px = (uint8_t) pixelFloatToByte(*bitmap(x, y));
fwrite(&px, sizeof(uint8_t), 1, file);
fwrite(&px, sizeof(uint8_t), 1, file);
fwrite(&px, sizeof(uint8_t), 1, file);
}
fwrite(padding, 1, padLength, file);
}
return !fclose(file);
}
bool saveBmp(const BitmapConstRef<float, 3> &bitmap, const char *filename) {
FILE *file = fopen(filename, "wb");
if (!file)
return false;
int paddedWidth;
writeBmpHeader(file, bitmap.width, bitmap.height, paddedWidth);
const uint8_t padding[4] = { };
int padLength = paddedWidth-3*bitmap.width;
for (int y = 0; y < bitmap.height; ++y) {
for (int x = 0; x < bitmap.width; ++x) {
uint8_t bgr[3] = {
(uint8_t) pixelFloatToByte(bitmap(x, y)[2]),
(uint8_t) pixelFloatToByte(bitmap(x, y)[1]),
(uint8_t) pixelFloatToByte(bitmap(x, y)[0])
};
fwrite(bgr, sizeof(uint8_t), 3, file);
}
fwrite(padding, 1, padLength, file);
}
return !fclose(file);
}
bool saveBmp(const BitmapConstRef<float, 4> &bitmap, const char *filename) {
// RGBA not supported by the BMP format
return false;
}
}
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