Attachment 12322 Details for Bug 13065 – Test case

Test case

cairo.m (text/plain), 3.13 KB, created by Richard Hult on 2007-11-02 16:35:47 UTC

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Creator: Richard Hult

Created: 2007-11-02 16:35:47 UTC

Size: 3.13 KB

patch

obsolete

>/* gcc -framework Cocoa -lobjc `pkg-config --cflags --libs cairo` cairo.m -o cairo
> * Draws a ring using a surface with a data buffer, and then using as
> * a source for a translated cr, which exposes what I believe is a
> * bug. At least the same code works for X11.
> */
>
>
>#import <Cocoa/Cocoa.h>
>#include <cairo/cairo-quartz.h>
>
>static void
>paint_ring (cairo_t *cr,
>	    int     x,
>	    int     y,
>	    int     width,
>	    int     height)
>{
>  int xx, yy;
>  double size, ring_width;
>  double dx, dy, dist;
>  double cx, cy;
>  double inner, outer;
>  uint32 *buf, *p;
>  cairo_surface_t *source;
>
>  size = MIN (width, height) / 2.0;
>  ring_width = 20;
>
>  cx = width / 2.0;
>  cy = height / 2.0;
>  
>  outer = size / 2.0;
>  inner = outer - ring_width;
>  
>  buf = calloc (width * height, sizeof (uint32));
>  for (yy = 0; yy < height; yy++)
>    {
>      p = buf + yy * width;
>      
>      dy = -(yy + y - cy);
>      
>      for (xx = 0; xx < width; xx++)
>	{
>	  dx = xx + x - cx;
>	  
>	  dist = dx * dx + dy * dy;
>	  if (dist < ((inner-1) * (inner-1)) || dist > ((outer+1) * (outer+1)))
>	    {
>	      *p++ = 0;
>	      continue;
>	    }
>	  
>	  *p++ = (255 << 16) | (65 << 8) | 24;
>	}
>    }
>
>  source = cairo_image_surface_create_for_data ((unsigned char *) buf,
>						CAIRO_FORMAT_RGB24,
>						width, height, 4 * width);
>
>  cairo_save (cr);
>    
>  cairo_set_source_surface (cr, source, x, y);
>  cairo_surface_destroy (source);
>
>  cairo_set_line_width (cr, ring_width);
>  cairo_new_path (cr);
>  cairo_arc (cr,
>	     cx, cy,
>	     size / 2.0 - ring_width / 2.0,
>	     0, 2 * M_PI);
>  cairo_stroke (cr);
>  
>  cairo_restore (cr);
>  
>  free (buf);
>}
>
>@interface TestView: NSView
>{
>}
>@end
>
>@implementation TestView
>
>- (id)initWithFrame:(NSRect)frameRect
>{
>  self = [super initWithFrame:frameRect];
>
>  return self;
>}
>
>- (BOOL)isOpaque
>{
>  return NO;
>}
>
>- (void)drawRect:(NSRect)rect
>{
>  NSRect bounds = [self bounds];
>  int width = bounds.size.width;
>  int height = bounds.size.height;
>
>  CGContextRef ctx = (CGContextRef)[[NSGraphicsContext
>                                      currentContext] graphicsPort];
>
>  CGContextTranslateCTM (ctx, 0.0, height);
>  CGContextScaleCTM (ctx, 1.0, -1.0);
>
>  cairo_surface_t *surface = cairo_quartz_surface_create_for_cg_context (ctx, width, height);
>  cairo_t *cr = cairo_create (surface);
>  
>  /* Commenting this will make the ring look as intented. */
>  //cairo_translate (cr, 10, 10);
>
>  paint_ring (cr, 0, 0, width, height);
>
>  cairo_destroy (cr);
>  cairo_surface_destroy (surface);
>}
>
>@end
>
>int
>main (int argc, char **argv)
>{
>    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
>
>    [NSApplication sharedApplication];
>    
>    int style = NSClosableWindowMask | NSResizableWindowMask |
>      NSTitledWindowMask | NSMiniaturizableWindowMask;
>    NSWindow *win = [[NSWindow alloc] initWithContentRect:NSMakeRect(50, 50, 600, 400)
>                                      styleMask:style
>                                      backing:NSBackingStoreBuffered
>                                      defer:NO];
>
>    NSView *view = [[TestView alloc] init];
>    
>    [win setContentView: view];
>
>    [win makeKeyAndOrderFront:win];
>    [NSApp run];
>
>    [pool release];
>  
>    return 0;
>}

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Attachments on bug 13065: 12322 | 12323 | 12920

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