Attachment 13935 Details for Bug 14248 – Minimal test case

Minimal test case

cairo.m (text/plain), 2.25 KB, created by Richard Hult on 2008-01-25 07:10:25 UTC

(hide)

Description:

Filename:

MIME Type:

Creator: Richard Hult

Created: 2008-01-25 07:10:25 UTC

Size: 2.25 KB

patch

obsolete

>/* gcc -framework Cocoa -lobjc `pkg-config --cflags --libs cairo` cairo.m -o cairo
> *
> * The cairo code is adapted from the clearlooks theme, to reproduce an error:
> * <Error>: CGBitmapContextGetBitsPerPixel: invalid context
> *
> */
>
>#import <Cocoa/Cocoa.h>
>#include <cairo/cairo-quartz.h>
>
>@interface TestView: NSView
>{
>}
>@end
>
>@implementation TestView
>
>- (id)initWithFrame:(NSRect)frameRect
>{
>  self = [super initWithFrame:frameRect];
>
>  return self;
>}
>
>- (BOOL)isOpaque
>{
>  return NO;
>}
>
>- (void)drawRect:(NSRect)rect
>{
>  int width, height;
>  CGContextRef context;
>  cairo_surface_t *surface;
>  cairo_t *cr;
>  cairo_pattern_t *pattern;
>  cairo_matrix_t matrix;
>
>  width = [self bounds].size.width;
>  height = [self bounds].size.height;
>
>  context = [[NSGraphicsContext currentContext] graphicsPort];
>  CGContextTranslateCTM (context, 0.0, height);
>  CGContextScaleCTM (context, 1.0, -1.0);
>
>  surface = cairo_quartz_surface_create_for_cg_context (context, width, height);
>  cr = cairo_create (surface);
>
>  /* This transformation seems to be what triggers the error: */
>  cairo_matrix_init (&matrix, 0, 1, 1, 0, 0, 0);
>  cairo_transform (cr, &matrix);
>      
>  pattern = cairo_pattern_create_linear (1, 1, 1, height - 2);
>  cairo_pattern_add_color_stop_rgb (pattern, 0,   0, 0, 0);
>  cairo_pattern_add_color_stop_rgb (pattern, 0.5, 0.5, 0.5, 0.5);
>  cairo_pattern_add_color_stop_rgb (pattern, 1,   1, 1, 1);
>  cairo_rectangle (cr, 1, 1, width - 2, height - 2);
>  cairo_set_source (cr, pattern);
>  cairo_fill (cr);
>  cairo_pattern_destroy (pattern);
>
>  cairo_destroy (cr);
>  cairo_surface_destroy (surface);
>}
>
>@end
>
>int
>main (int argc, char **argv)
>{
>  NSAutoreleasePool *pool;
>  int style;
>  NSWindow *window;
>  NSView *view;
>
>  pool = [[NSAutoreleasePool alloc] init];
>
>  [NSApplication sharedApplication];
>    
>  style = 
>    NSTitledWindowMask | NSMiniaturizableWindowMask;
>  window = [[NSWindow alloc] initWithContentRect:NSMakeRect(100, 100, 300, 300)
>                                       styleMask:style
>                                         backing:NSBackingStoreBuffered
>                                           defer:NO];
>
>  view = [[TestView alloc] init];
>    
>  [window setContentView: view];
>  [window makeKeyAndOrderFront:window];
>
>  [NSApp run];
>
>  [pool release];
>  
>  return 0;
>}

Actions: View

Attachments on bug 14248: 13935

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.