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- /* Copyright 2011-2014 Pierre Ossman for Cendio AB
- *
- * This is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This software 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this software; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
- #ifdef HAVE_CONFIG_H
- #include <config.h>
- #endif
-
- #include <ApplicationServices/ApplicationServices.h>
-
- #include <FL/Fl_Window.H>
- #include <FL/x.H>
-
- #include <rfb/LogWriter.h>
- #include <rfb/Exception.h>
-
- #include "i18n.h"
- #include "OSXPixelBuffer.h"
-
- using namespace rfb;
-
- static rfb::LogWriter vlog("OSXPixelBuffer");
-
- OSXPixelBuffer::OSXPixelBuffer(int width, int height) :
- PlatformPixelBuffer(rfb::PixelFormat(32, 24, false, true,
- 255, 255, 255, 16, 8, 0),
- width, height, NULL, width),
- bitmap(NULL)
- {
- CGColorSpaceRef lut;
-
- data = new rdr::U8[width * height * format.bpp/8];
- if (data == NULL)
- throw rfb::Exception(_("Not enough memory for framebuffer"));
-
- lut = CGColorSpaceCreateDeviceRGB();
- if (!lut)
- throw rfb::Exception(_("Could not create framebuffer device"));
-
- bitmap = CGBitmapContextCreate(data, width, height, 8, width*4, lut,
- kCGImageAlphaNoneSkipFirst | kCGBitmapByteOrder32Little);
- CGColorSpaceRelease(lut);
- if (!bitmap)
- throw rfb::Exception(_("Could not create framebuffer bitmap"));
- }
-
-
- OSXPixelBuffer::~OSXPixelBuffer()
- {
- CFRelease((CGContextRef)bitmap);
- delete [] data;
- }
-
-
- void OSXPixelBuffer::draw(int src_x, int src_y, int x, int y, int w, int h)
- {
- CGRect rect;
- CGContextRef gc;
- CGAffineTransform at;
- CGImageRef image;
-
- gc = (CGContextRef)fl_gc;
-
- CGContextSaveGState(gc);
-
- // We have to use clipping to partially display an image
-
- rect.origin.x = x - 0.5;
- rect.origin.y = y - 0.5;
- rect.size.width = w;
- rect.size.height = h;
-
- CGContextClipToRect(gc, rect);
-
- // Oh the hackiness that is OS X image handling...
- // The CGContextDrawImage() routine magically flips the images and offsets
- // them by 0.5,0.5 in order to compensate for OS X unfamiliar coordinate
- // system. But this breaks horribly when you set up the CTM to get the
- // more familiar top-down system (which FLTK does), meaning we have to
- // reset the CTM back to the identity matrix and calculate new origin
- // coordinates.
-
- at = CGContextGetCTM(gc);
- CGContextScaleCTM(gc, 1, -1);
- CGContextTranslateCTM(gc, -at.tx, -at.ty);
-
- rect.origin.x = x - src_x;
- rect.origin.y = Fl_Window::current()->h() - (y - src_y);
- rect.size.width = width();
- rect.size.height = -height(); // Negative height does _not_ flip the image
-
- image = CGBitmapContextCreateImage((CGContextRef)bitmap);
- CGContextDrawImage(gc, rect, image);
- CGImageRelease(image);
-
- CGContextRestoreGState(gc);
- }
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