Initial commit

Bringing a lot of stuff over from my maze-reader project in an attempt
to split the image reading code off into a library.

1 files changed, 60 insertions, 0 deletions

diff --git a/src/PNGImage.h b/src/PNGImage.h
new file mode 100644
index 0000000..23c32a0
--- /dev/null
+++ b/src/PNGImage.h
@@ -0,0 +1,60 @@
+#pragma once
+
+#include "reader.h"
+#include "image.h"
+#include "zlib.h"
+#include <cstddef>
+#include <cstdint>
+#include <map>
+#include <string>
+#include <vector>
+
+#define CHUNK_READER(X) void X(uint32_t chunkSize)
+#define REGISTER_CHUNK_READER(X) chunkReaders.insert({#X, &PNGImage::X})
+#define DEFINE_CHUNK_READER(X) void PNGImage::X(uint32_t chunkSize)
+
+class PNGImage : Image
+{
+private:
+	ZLibInflator zlib;
+	uint8_t* idatData;
+	unsigned long idatDataSize;
+public:
+	PNGImage(std::string filename);
+	~PNGImage();
+	
+	// sRGB
+	uint8_t renderingIntent;
+
+	// pHYs
+	uint32_t pixelsPerX;
+	uint32_t pixelsPerY;
+	uint8_t unit;
+
+	// tIME
+	uint16_t year;
+	uint8_t month;
+	uint8_t day;
+	uint8_t hour;
+	uint8_t minute;
+	uint8_t second;
+
+	bool readNextChunk();
+	
+private:
+	std::map<std::string, void(PNGImage::*)(uint32_t chunkSize)> chunkReaders;
+	CHUNK_READER(IHDR);
+	CHUNK_READER(iCCP);
+	CHUNK_READER(sRGB);
+	CHUNK_READER(eXIf);
+	CHUNK_READER(iDOT);
+	CHUNK_READER(pHYs);
+	CHUNK_READER(tIME);
+	CHUNK_READER(tEXt);
+	CHUNK_READER(IDAT);
+	CHUNK_READER(IEND);
+
+	bool end = false;
+
+	Reader reader;
+};