[qwaq] Implement blitting from draw buffer to text

Sending the data out to curses.

ruamoko/qwaq/qwaq-draw.h

@@ -13,6 +13,10 @@
 }
 + (DrawBuffer *) buffer: (Extent) size;
 - initWithSize: (Extent) size;
+
+- (Extent) size;
+- (int *) buffer;
+
 - blitFromBuffer: (DrawBuffer *) srcBuffer to: (Point) pos from: (Rect) rect;
 
 - (void) printf: (string) fmt, ...;

ruamoko/qwaq/qwaq-draw.r

@@ -18,6 +18,16 @@
 	return self;
 }
 
+- (Extent) size
+{
+	return size;
+}
+
+- (int *) buffer
+{
+	return buffer;
+}
+
 - blitFromBuffer: (DrawBuffer *) srcBuffer to: (Point) pos from: (Rect) rect
 {
 	Extent srcSize = srcBuffer.size;

ruamoko/qwaq/qwaq-textcontext.h

@@ -6,9 +6,24 @@
 #include "qwaq-curses.h"
 #include "qwaq-rect.h"
 
+@class DrawBuffer;
+
 @interface TextContext : Object
 {
 	window_t    window;
+	union {
+		Rect        rect;
+		struct {
+			Point       offset;
+			Extent      size;
+		};
+		struct {
+			int         xpos;
+			int         ypos;
+			int         xlen;
+			int         ylen;
+		};
+	};
 }
 + (int) max_colors;
 + (int) max_color_pairs;
@@ -25,6 +40,8 @@
 
 -(window_t) window;
 
+- blitFromBuffer: (DrawBuffer *) srcBuffer to: (Point) pos from: (Rect) rect;
+
 - (void) printf: (string) fmt, ...;
 - (void) vprintf: (string) mft, @va_list args;
 - (void) addch: (int) ch;

ruamoko/qwaq/qwaq-textcontext.r

@@ -1,3 +1,4 @@
+#include "qwaq-draw.h"
 #include "qwaq-textcontext.h"
 
 @implementation TextContext
@@ -59,6 +60,39 @@ static TextContext *screen;
 	return window;
 }
 
+- blitFromBuffer: (DrawBuffer *) srcBuffer to: (Point) pos from: (Rect) rect
+{
+	Extent srcSize = [srcBuffer size];
+	Rect r = { {}, srcSize };
+	Rect t = { pos, rect.extent };
+
+	t = clipRect (r, t);
+	if (t.extent.width < 0 || t.extent.height < 0) {
+		return self;
+	}
+
+	rect.offset.x += t.offset.x - pos.x;
+	rect.offset.y += t.offset.y - pos.y;
+	rect.extent = t.extent;
+	pos = t.offset;
+
+	r.offset = nil;
+	r.extent = size;
+
+	rect = clipRect (r, rect);
+	if (rect.extent.width < 0 || rect.extent.height < 0) {
+		return self;
+	}
+
+	int        *src = [srcBuffer buffer]
+					  + rect.offset.y * srcSize.width + rect.offset.x;
+	for (int y = 0; y < rect.extent.height; y++) {
+		mvwblit_line (window, pos.x, y + pos.y, src, rect.extent.width);
+		src += srcSize.width;
+	}
+	return self;
+}
+
 - (void) mvprintf: (Point) pos, string fmt, ... = #0;
 - (void) printf: (string) fmt, ... = #0;
 - (void) vprintf: (string) mft, @va_list args = #0;