X-Git-Url: https://git.lukelau.me/?p=opengl.git;a=blobdiff_plain;f=image.cpp;h=02fd60b878ee1122bd9a027e38df10304d681ef8;hp=71114b0d85c8f239800602b3e0e1fcfe0431493b;hb=d0c631f46c6db417e013b1bc0edec24cb9c2824a;hpb=c44e69ec78367fb2957324026894aef970f2481a

diff --git a/image.cpp b/image.cpp
index 71114b0..02fd60b 100644
--- a/image.cpp
+++ b/image.cpp
@@ -1,31 +1,74 @@
 #include "image.hpp"
+#include <ImageIO/ImageIO.h>
 
 Image::Image(const std::string &path) {
-	auto provider = CGDataProviderCreateWithFilename(path.c_str());
-	std::ifstream file(path);
-	long magic;
-	file.read((char*)&magic, 8);
-	file.close();
+	CFStringRef str = CFStringCreateWithCString(NULL, path.c_str(), kCFStringEncodingUTF8);
+	CFURLRef url = CFURLCreateWithFileSystemPath(NULL, str, kCFURLPOSIXPathStyle, false);
+	CGImageSourceRef source = CGImageSourceCreateWithURL(url, NULL);
+	CGImageRef ref = CGImageSourceCreateImageAtIndex(source, 0, NULL);
+	initWithImageRef(ref);
+	CGImageRelease(ref);
+}
 
+Image::Image(const unsigned char *data, size_t length, const char *formatHint) {
+	CGDataProviderRef dpRef = CGDataProviderCreateWithData(NULL, data, length, NULL);
 	CGImageRef ref;
-
-	if (magic == 0x0a1a0a0d474e5089) // png magic number
-		ref = CGImageCreateWithPNGDataProvider(provider, nullptr, false, kCGRenderingIntentDefault);
+	if (strcmp("png", formatHint) == 0)
+		ref = CGImageCreateWithPNGDataProvider(dpRef, NULL, false, kCGRenderingIntentDefault);
+	else if (strcmp("jpg", formatHint) == 0)
+		ref = CGImageCreateWithJPEGDataProvider(dpRef, NULL, false, kCGRenderingIntentDefault);
 	else
-		ref = CGImageCreateWithJPEGDataProvider(provider, nullptr, false, kCGRenderingIntentDefault);
+		abort();
+	initWithImageRef(ref);
+	CGImageRelease(ref);
+}
 
+void Image::initWithImageRef(CGImageRef ref) {
 	_width = CGImageGetWidth(ref), _height = CGImageGetHeight(ref);
+	info = CGImageGetBitmapInfo(ref);
+	alphaInfo = CGImageGetAlphaInfo(ref);
+	colorSpace = CGImageGetColorSpace(ref);
+	bitsPerComponent = CGImageGetBitsPerComponent(ref);
 
 	dataRef = CGDataProviderCopyData(CGImageGetDataProvider(ref));
-	CGImageRelease(ref);
-
 }
 
-unsigned char *Image::data() {
+unsigned char *Image::data() const {
 	return (unsigned char*) CFDataGetBytePtr(dataRef);
 }
 
 GLfloat Image::width() const { return _width; }
 GLfloat Image::height() const { return _height; }
 
+// TODO: Properly implement this for both internal format + format
+GLenum Image::format() const {
+	if (CGColorSpaceGetModel(colorSpace) == kCGColorSpaceModelMonochrome) {
+		return GL_DEPTH_COMPONENT;
+	}
+	if (alphaInfo == kCGImageAlphaNone) {
+		return GL_RGB;
+	}
+	return GL_RGBA;
+}
+
+GLint Image::internalFormat() const {
+	switch (format()) {
+		case GL_DEPTH_COMPONENT: return GL_DEPTH_COMPONENT;
+		case GL_RGB: return GL_RGB;
+		default: return GL_RGBA;
+	}
+}
+
+GLenum Image::type() const {
+	bool isFloat = info & kCGBitmapFloatComponents;
+	if (isFloat) return GL_FLOAT;
+	return GL_UNSIGNED_BYTE;
+	
+	//TODO:
+	/* switch (bitsPerComponent) { */
+	/* 	case 1: return GL_UNSIGNED_BYTE; */
+	/* 	case 16: return GL_UNSIGNED_SHORT; */
+	/*  case 24: */ 
+}
+
 Image::~Image() { CFRelease(dataRef); }