1 files changed, 82 insertions, 0 deletions
diff --git a/src/libui_sdl/libui/darwin/image.m b/src/libui_sdl/libui/darwin/image.m
new file mode 100644
index 0000000..b62de31
--- /dev/null
+++ b/src/libui_sdl/libui/darwin/image.m
@@ -0,0 +1,82 @@
+// 25 june 2016
+#import "uipriv_darwin.h"
+
+struct uiImage {
+	NSImage *i;
+	NSSize size;
+	NSMutableArray *swizzled;
+};
+
+uiImage *uiNewImage(double width, double height)
+{
+	uiImage *i;
+
+	i = uiNew(uiImage);
+	i->size = NSMakeSize(width, height);
+	i->i = [[NSImage alloc] initWithSize:i->size];
+	i->swizzled = [NSMutableArray new];
+	return i;
+}
+
+void uiFreeImage(uiImage *i)
+{
+	NSValue *v;
+
+	[i->i release];
+	// to be safe, do this after releasing the image
+	for (v in i->swizzled)
+		uiFree([v pointerValue]);
+	[i->swizzled release];
+	uiFree(i);
+}
+
+void uiImageAppend(uiImage *i, void *pixels, int pixelWidth, int pixelHeight, int pixelStride)
+{
+	NSBitmapImageRep *repCalibrated, *repsRGB;
+	uint8_t *swizzled, *bp, *sp;
+	int x, y;
+	unsigned char *pix[1];
+
+	// OS X demands that R and B are in the opposite order from what we expect
+	// we must swizzle :(
+	// LONGTERM test on a big-endian system
+	swizzled = (uint8_t *) uiAlloc((pixelStride * pixelHeight * 4) * sizeof (uint8_t), "uint8_t[]");
+	bp = (uint8_t *) pixels;
+	sp = swizzled;
+	for (y = 0; y < pixelHeight * pixelStride; y += pixelStride)
+		for (x = 0; x < pixelStride; x++) {
+			sp[0] = bp[2];
+			sp[1] = bp[1];
+			sp[2] = bp[0];
+			sp[3] = bp[3];
+			sp += 4;
+			bp += 4;
+		}
+
+	pix[0] = (unsigned char *) swizzled;
+	repCalibrated = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes:pix
+		pixelsWide:pixelWidth
+		pixelsHigh:pixelHeight
+		bitsPerSample:8
+		samplesPerPixel:4
+		hasAlpha:YES
+		isPlanar:NO
+		colorSpaceName:NSCalibratedRGBColorSpace
+		bitmapFormat:0
+		bytesPerRow:pixelStride
+		bitsPerPixel:32];
+	repsRGB = [repCalibrated bitmapImageRepByRetaggingWithColorSpace:[NSColorSpace sRGBColorSpace]];
+	[repCalibrated release];
+
+	[i->i addRepresentation:repsRGB];
+	[repsRGB setSize:i->size];
+	[repsRGB release];
+
+	// we need to keep swizzled alive for NSBitmapImageRep
+	[i->swizzled addObject:[NSValue valueWithPointer:swizzled]];
+}
+
+NSImage *imageImage(uiImage *i)
+{
+	return i->i;
+}