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* Source/cairo/XGCairoSurface.m: Implementation of

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-[GSDisplayServer contentsOfScreen:inRect:] for x11/cairo


git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/back/trunk@33443 72102866-910b-0410-8b05-ffd578937521
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Eric Wasylishen 2011-07-03 23:45:22 +00:00
parent 55bc606c48
commit 9bc09976ee
2 changed files with 89 additions and 0 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2011-07-03 Eric Wasylishen <ewasylishen@gmail.com>
* Source/cairo/XGCairoSurface.m: Implementation of
-[GSDisplayServer contentsOfScreen:inRect:] for x11/cairo
2011-06-22 Fred Kiefer <FredKiefer@gmx.de>
* Headers/x11/XGServer.h: Add #include of config.h.

84
Source/cairo/XGCairoSurface.m
View file

@ -22,6 +22,8 @@
Boston, MA 02110-1301, USA.
*/
#include <AppKit/NSImage.h>
#include <AppKit/NSGraphics.h>
#include "x11/XGServer.h"
#include "x11/XGServerWindow.h"
#include "cairo/XGCairoSurface.h"
@ -84,3 +86,85 @@
}
@end
@implementation XGServer (ScreenCapture)
- (NSImage *) contentsOfScreen: (int)screen inRect: (NSRect)rect
{
Window win;
XWindowAttributes attrs;
win = [self xDisplayRootWindowForScreen: screen];
if (XGetWindowAttributes(dpy, win, &attrs))
{
NSImage *result;
NSBitmapImageRep *bmp;
cairo_surface_t *src, *dest;
bmp = [[[NSBitmapImageRep alloc] initWithBitmapDataPlanes: NULL
pixelsWide: attrs.width
pixelsHigh: attrs.height
bitsPerSample: 8
samplesPerPixel: 4
hasAlpha: YES
isPlanar: NO
colorSpaceName: NSDeviceRGBColorSpace
bitmapFormat: 0
bytesPerRow: 0
bitsPerPixel: 32] autorelease];
src = cairo_xlib_surface_create(dpy, win, attrs.visual, attrs.width, attrs.height);
dest = cairo_image_surface_create_for_data([bmp bitmapData], CAIRO_FORMAT_ARGB32, attrs.width, attrs.height, [bmp bytesPerRow]);
{
cairo_t *cr = cairo_create(dest);
cairo_set_source_surface(cr, src, 0, 0);
cairo_paint(cr);
cairo_destroy(cr);
}
cairo_surface_destroy(src);
cairo_surface_destroy(dest);
// Convert BGRA to RGBA
{
NSInteger stride;
NSInteger x, y;
unsigned char *cdata;
stride = [bmp bytesPerRow];
cdata = [bmp bitmapData];
for (y = 0; y < attrs.height; y++)
{
for (x = 0; x < attrs.width; x++)
{
NSInteger i = (y * stride) + (x * 4);
unsigned char d = cdata[i];
#if GS_WORDS_BIGENDIAN
cdata[i] = cdata[i + 1];
cdata[i + 1] = cdata[i + 2];
cdata[i + 2] = cdata[i + 3];
cdata[i + 3] = d;
#else
cdata[i] = cdata[i + 2];
//cdata[i + 1] = cdata[i + 1];
cdata[i + 2] = d;
//cdata[i + 3] = cdata[i + 3];
#endif
}
}
}
result = [[[NSImage alloc] initWithSize: NSMakeSize(attrs.width, attrs.height)] autorelease];
[result addRepresentation: bmp];
return result;
}
return nil;
}
@end