Add dirty but working cocoa frontend

1 files changed, 105 insertions, 0 deletions

diff --git a/bin/gfcocoa.m b/bin/gfcocoa.m
new file mode 100644
index 00000000..ae2a1445
--- /dev/null
+++ b/bin/gfcocoa.m
@@ -0,0 +1,105 @@
+/* Copyright (c) 2018, Curtis McEnroe <programble@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#import <Cocoa/Cocoa.h>
+#import <stdint.h>
+#import <stdlib.h>
+
+extern int init(int argc, char *argv[]);
+extern void draw(uint32_t *buf, size_t xres, size_t yres);
+extern void input(char in);
+
+#define WIDTH (640)
+#define HEIGHT (480)
+
+static size_t size = 4 * WIDTH * HEIGHT;
+static uint32_t buf[WIDTH * HEIGHT];
+
+@interface BufferView : NSView { }
+@end
+
+@implementation BufferView
+- (void) drawRect: (NSRect) dirtyRect {
+    CGContextRef ctx = [[NSGraphicsContext currentContext] CGContext];
+    CGColorSpaceRef rgb = CGColorSpaceCreateDeviceRGB();
+    CGDataProviderRef data = CGDataProviderCreateWithData(NULL, buf, size, NULL);
+    CGImageRef image = CGImageCreate(
+        WIDTH,
+        HEIGHT,
+        8,
+        32,
+        WIDTH * 4,
+        rgb,
+        kCGBitmapByteOrder32Little | kCGImageAlphaNoneSkipFirst,
+        data,
+        NULL,
+        false,
+        kCGRenderingIntentDefault
+    );
+    CGContextDrawImage(ctx, CGRectMake(0, 0, WIDTH, HEIGHT), image);
+    CGImageRelease(image);
+    CGDataProviderRelease(data);
+    CGColorSpaceRelease(rgb);
+}
+
+- (BOOL) acceptsFirstResponder {
+    return YES;
+}
+
+- (void) keyDown: (NSEvent *) event {
+    char in;
+    [
+        [event characters]
+        getBytes: &in
+        maxLength: 1
+        usedLength: NULL
+        encoding: NSASCIIStringEncoding
+        options: NSStringEncodingConversionAllowLossy
+        range: NSMakeRange(0, 1)
+        remainingRange: NULL
+    ];
+    input(in);
+    draw(buf, WIDTH, HEIGHT);
+    [self setNeedsDisplay: YES];
+}
+@end
+
+int main(int argc, char *argv[]) {
+    int error = init(argc, argv);
+    if (error) return error;
+
+    [NSApplication sharedApplication];
+    [NSApp setActivationPolicy: NSApplicationActivationPolicyRegular];
+
+    NSWindow *window = [
+        [NSWindow alloc]
+        initWithContentRect: NSMakeRect(0, 0, 640, 480)
+        styleMask: NSTitledWindowMask | NSClosableWindowMask
+        backing: NSBackingStoreBuffered
+        defer: NO
+    ];
+    [window setTitle: [[NSString alloc] initWithUTF8String: argv[0]]];
+    [window center];
+
+    BufferView *view = [[BufferView alloc] initWithFrame: [window frame]];
+    [window setContentView: view];
+
+    draw(buf, WIDTH, HEIGHT);
+
+    [window makeKeyAndOrderFront: nil];
+    [NSApp activateIgnoringOtherApps: YES];
+    [NSApp run];
+}