mirror of https://github.com/Chlumsky/msdfgen.git
193 lines
6.2 KiB
C++
193 lines
6.2 KiB
C++
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#define _CRT_SECURE_NO_WARNINGS
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#include "save-tiff.h"
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#include <cstdio>
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#ifdef MSDFGEN_USE_CPP11
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#include <cstdint>
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#else
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typedef int int32_t;
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typedef unsigned uint32_t;
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typedef unsigned short uint16_t;
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typedef unsigned char uint8_t;
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#endif
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namespace msdfgen {
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template <typename T>
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static bool writeValue(FILE *file, T value) {
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return fwrite(&value, sizeof(T), 1, file) == 1;
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}
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static bool writeTiffHeader(FILE *file, int width, int height, int channels) {
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#ifdef __BIG_ENDIAN__
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writeValue<uint16_t>(file, 0x4d4du);
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#else
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writeValue<uint16_t>(file, 0x4949u);
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#endif
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writeValue<uint16_t>(file, 42);
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writeValue<uint32_t>(file, 0x0008u); // Offset of first IFD
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// Offset = 0x0008
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writeValue<uint16_t>(file, 15); // Number of IFD entries
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// ImageWidth
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writeValue<uint16_t>(file, 0x0100u);
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writeValue<uint16_t>(file, 0x0004u);
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writeValue<uint32_t>(file, 1);
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writeValue<int32_t>(file, width);
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// ImageLength
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writeValue<uint16_t>(file, 0x0101u);
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writeValue<uint16_t>(file, 0x0004u);
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writeValue<uint32_t>(file, 1);
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writeValue<int32_t>(file, height);
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// BitsPerSample
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writeValue<uint16_t>(file, 0x0102u);
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writeValue<uint16_t>(file, 0x0003u);
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writeValue<uint32_t>(file, channels);
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if (channels == 3)
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writeValue<uint32_t>(file, 0x00c2u); // Offset of 32, 32, 32
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else {
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writeValue<uint16_t>(file, 32);
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writeValue<uint16_t>(file, 0);
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}
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// Compression
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writeValue<uint16_t>(file, 0x0103u);
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writeValue<uint16_t>(file, 0x0003u);
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writeValue<uint32_t>(file, 1);
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writeValue<uint16_t>(file, 1);
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writeValue<uint16_t>(file, 0);
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// PhotometricInterpretation
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writeValue<uint16_t>(file, 0x0106u);
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writeValue<uint16_t>(file, 0x0003u);
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writeValue<uint32_t>(file, 1);
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writeValue<uint16_t>(file, channels == 3 ? 2 : 1);
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writeValue<uint16_t>(file, 0);
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// StripOffsets
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writeValue<uint16_t>(file, 0x0111u);
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writeValue<uint16_t>(file, 0x0004u);
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writeValue<uint32_t>(file, 1);
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writeValue<uint32_t>(file, channels == 3 ? 0x00f6u : 0x00d2u); // Offset of pixel data
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// SamplesPerPixel
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writeValue<uint16_t>(file, 0x0115u);
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writeValue<uint16_t>(file, 0x0003u);
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writeValue<uint32_t>(file, 1);
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writeValue<uint16_t>(file, channels);
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writeValue<uint16_t>(file, 0);
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// RowsPerStrip
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writeValue<uint16_t>(file, 0x0116u);
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writeValue<uint16_t>(file, 0x0004u);
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writeValue<uint32_t>(file, 1);
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writeValue<int32_t>(file, height);
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// StripByteCounts
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writeValue<uint16_t>(file, 0x0117u);
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writeValue<uint16_t>(file, 0x0004u);
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writeValue<uint32_t>(file, 1);
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writeValue<int32_t>(file, sizeof(float)*channels*width*height);
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// XResolution
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writeValue<uint16_t>(file, 0x011au);
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writeValue<uint16_t>(file, 0x0005u);
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writeValue<uint32_t>(file, 1);
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writeValue<uint32_t>(file, channels == 3 ? 0x00c8u : 0x00c2u); // Offset of 300, 1
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// YResolution
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writeValue<uint16_t>(file, 0x011bu);
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writeValue<uint16_t>(file, 0x0005u);
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writeValue<uint32_t>(file, 1);
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writeValue<uint32_t>(file, channels == 3 ? 0x00d0u : 0x00cau); // Offset of 300, 1
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// ResolutionUnit
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writeValue<uint16_t>(file, 0x0128u);
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writeValue<uint16_t>(file, 0x0003u);
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writeValue<uint32_t>(file, 1);
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writeValue<uint16_t>(file, 2);
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writeValue<uint16_t>(file, 0);
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// SampleFormat
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writeValue<uint16_t>(file, 0x0153u);
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writeValue<uint16_t>(file, 0x0003u);
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writeValue<uint32_t>(file, channels);
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if (channels == 3)
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writeValue<uint32_t>(file, 0x00d8u); // Offset of 3, 3, 3
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else {
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writeValue<uint16_t>(file, 3);
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writeValue<uint16_t>(file, 0);
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}
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// SMinSampleValue
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writeValue<uint16_t>(file, 0x0154u);
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writeValue<uint16_t>(file, 0x000bu);
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writeValue<uint32_t>(file, channels);
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if (channels == 3)
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writeValue<uint32_t>(file, 0x00deu); // Offset of 0.f, 0.f, 0.f
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else
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writeValue<float>(file, 0.f);
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// SMaxSampleValue
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writeValue<uint16_t>(file, 0x0155u);
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writeValue<uint16_t>(file, 0x000bu);
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writeValue<uint32_t>(file, channels);
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if (channels == 3)
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writeValue<uint32_t>(file, 0x00eau); // Offset of 1.f, 1.f, 1.f
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else
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writeValue<float>(file, 1.f);
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// Offset = 0x00be
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writeValue<uint32_t>(file, 0);
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if (channels == 3) {
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// 0x00c2 BitsPerSample data
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writeValue<uint16_t>(file, 32);
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writeValue<uint16_t>(file, 32);
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writeValue<uint16_t>(file, 32);
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// 0x00c8 XResolution data
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writeValue<uint32_t>(file, 300);
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writeValue<uint32_t>(file, 1);
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// 0x00d0 YResolution data
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writeValue<uint32_t>(file, 300);
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writeValue<uint32_t>(file, 1);
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// 0x00d8 SampleFormat data
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writeValue<uint16_t>(file, 3);
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writeValue<uint16_t>(file, 3);
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writeValue<uint16_t>(file, 3);
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// 0x00de SMinSampleValue data
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writeValue<float>(file, 0.f);
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writeValue<float>(file, 0.f);
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writeValue<float>(file, 0.f);
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// 0x00ea SMaxSampleValue data
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writeValue<float>(file, 1.f);
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writeValue<float>(file, 1.f);
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writeValue<float>(file, 1.f);
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// Offset = 0x00f6
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} else {
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// 0x00c2 XResolution data
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writeValue<uint32_t>(file, 300);
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writeValue<uint32_t>(file, 1);
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// 0x00ca YResolution data
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writeValue<uint32_t>(file, 300);
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writeValue<uint32_t>(file, 1);
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// Offset = 0x00d2
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}
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return true;
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}
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bool saveTiff(const BitmapConstRef<float, 1> &bitmap, const char *filename) {
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FILE *file = fopen(filename, "wb");
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if (!file)
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return false;
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writeTiffHeader(file, bitmap.width, bitmap.height, 1);
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for (int y = bitmap.height-1; y >= 0; --y)
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fwrite(bitmap(0, y), sizeof(float), bitmap.width, file);
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return !fclose(file);
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}
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bool saveTiff(const BitmapConstRef<float, 3> &bitmap, const char *filename) {
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FILE *file = fopen(filename, "wb");
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if (!file)
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return false;
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writeTiffHeader(file, bitmap.width, bitmap.height, 3);
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for (int y = bitmap.height-1; y >= 0; --y)
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fwrite(bitmap(0, y), sizeof(float), 3*bitmap.width, file);
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return !fclose(file);
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}
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}
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