1 files changed, 159 insertions, 0 deletions
diff --git a/bin/gfx/cocoa.m b/bin/gfx/cocoa.m
new file mode 100644
index 00000000..ece79fb5
--- /dev/null
+++ b/bin/gfx/cocoa.m
@@ -0,0 +1,159 @@
+/* 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 <err.h>
+#import <stdbool.h>
+#import <stdint.h>
+#import <stdlib.h>
+#import <sysexits.h>
+
+#define UNUSED __attribute__((unused))
+
+extern int init(int argc, char *argv[]);
+extern const char *status(void);
+extern void draw(uint32_t *buf, size_t xres, size_t yres);
+extern bool input(char in);
+
+@interface BufferView : NSView {
+    size_t bufSize;
+    uint32_t *buf;
+    CGColorSpaceRef colorSpace;
+    CGDataProviderRef dataProvider;
+}
+@end
+
+@implementation BufferView
+- (instancetype) initWithFrame: (NSRect) frameRect {
+    colorSpace = CGColorSpaceCreateDeviceRGB();
+    return [super initWithFrame: frameRect];
+}
+
+- (void) setWindowTitle {
+    [[self window] setTitle: [NSString stringWithUTF8String: status()]];
+}
+
+- (void) draw {
+    draw(buf, [self frame].size.width, [self frame].size.height);
+    [self setNeedsDisplay: YES];
+}
+
+- (void) setFrameSize: (NSSize) newSize {
+    [super setFrameSize: newSize];
+    size_t newBufSize = 4 * newSize.width * newSize.height;
+    if (newBufSize > bufSize) {
+        bufSize = newBufSize;
+        buf = malloc(bufSize);
+        if (!buf) err(EX_OSERR, "malloc(%zu)", bufSize);
+        CGDataProviderRelease(dataProvider);
+        dataProvider = CGDataProviderCreateWithData(NULL, buf, bufSize, NULL);
+    }
+    [self draw];
+}
+
+- (void) drawRect: (NSRect) UNUSED dirtyRect {
+    NSSize size = [self frame].size;
+    CGContextRef ctx = [[NSGraphicsContext currentContext] CGContext];
+    CGImageRef image = CGImageCreate(
+        size.width, size.height,
+        8, 32, 4 * size.width,
+        colorSpace, kCGBitmapByteOrder32Little | kCGImageAlphaNoneSkipFirst,
+        dataProvider,
+        NULL, false, kCGRenderingIntentDefault
+    );
+    CGContextDrawImage(ctx, [self frame], image);
+    CGImageRelease(image);
+}
+
+- (BOOL) acceptsFirstResponder {
+    return YES;
+}
+
+- (void) keyDown: (NSEvent *) event {
+    char in;
+    BOOL converted = [
+        [event characters]
+        getBytes: &in
+        maxLength: 1
+        usedLength: NULL
+        encoding: NSASCIIStringEncoding
+        options: 0
+        range: NSMakeRange(0, 1)
+        remainingRange: NULL
+    ];
+    if (converted) {
+        if (!input(in)) {
+            [NSApp terminate: self];
+        }
+        [self setWindowTitle];
+        [self draw];
+    }
+}
+@end
+
+@interface Delegate : NSObject <NSApplicationDelegate>
+@end
+
+@implementation Delegate
+- (BOOL) applicationShouldTerminateAfterLastWindowClosed:
+    (NSApplication *) UNUSED sender {
+    return YES;
+}
+@end
+
+int main(int argc, char *argv[]) {
+    int error = init(argc, argv);
+    if (error) return error;
+
+    [NSApplication sharedApplication];
+    [NSApp setActivationPolicy: NSApplicationActivationPolicyRegular];
+    [NSApp setDelegate: [Delegate new]];
+
+    NSString *name = [[NSProcessInfo processInfo] processName];
+    NSMenu *menu = [NSMenu new];
+    NSMenuItem *quit = [
+        [NSMenuItem alloc]
+        initWithTitle: [@"Quit " stringByAppendingString: name]
+        action: @selector(terminate:)
+        keyEquivalent: @"q"
+    ];
+    [menu addItem: quit];
+    NSMenuItem *menuItem = [NSMenuItem new];
+    [menuItem setSubmenu: menu];
+    [NSApp setMainMenu: [NSMenu new]];
+    [[NSApp mainMenu] addItem: menuItem];
+
+    NSUInteger style = NSTitledWindowMask
+        | NSClosableWindowMask
+        | NSMiniaturizableWindowMask
+        | NSResizableWindowMask;
+    NSWindow *window = [
+        [NSWindow alloc]
+        initWithContentRect: NSMakeRect(0, 0, 800, 600)
+        styleMask: style
+        backing: NSBackingStoreBuffered
+        defer: YES
+    ];
+    [window center];
+
+    BufferView *view = [[BufferView alloc] initWithFrame: [window frame]];
+    [window setContentView: view];
+    [view setWindowTitle];
+
+    [window makeKeyAndOrderFront: nil];
+    [NSApp activateIgnoringOtherApps: YES];
+    [NSApp run];
+}