Complete driver-based implementation of Fl_Image_Surface.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3-porting@11283 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

3 files changed, 156 insertions, 1 deletions

diff --git a/src/drivers/Quartz/Fl_Quartz_Copy_Surface.cxx b/src/drivers/Quartz/Fl_Quartz_Copy_Surface.cxx
index 9c767d9b9..e138f3c4d 100644
--- a/src/drivers/Quartz/Fl_Quartz_Copy_Surface.cxx
+++ b/src/drivers/Quartz/Fl_Quartz_Copy_Surface.cxx
@@ -21,7 +21,6 @@
 #ifdef FL_CFG_GFX_QUARTZ
 #include "Fl_Quartz_Copy_Surface.H"
 #include "Fl_Quartz_Graphics_Driver.H"
-#endif
 
 Fl_Copy_Surface::Helper::Helper(int w, int h) : Fl_Widget_Surface(NULL), width(w), height(h) {
   driver(new Fl_Quartz_Graphics_Driver);
@@ -86,6 +85,8 @@ void Fl_Copy_Surface::Helper::untranslate() {
   CGContextRestoreGState(gc);
 }
 
+#endif // FL_CFG_GFX_QUARTZ
+
 //
 // End of "$Id: Fl_Copy_Surface.H 11220 2016-02-26 12:51:47Z manolo $".
 //
diff --git a/src/drivers/Quartz/Fl_Quartz_Image_Surface.H b/src/drivers/Quartz/Fl_Quartz_Image_Surface.H
new file mode 100644
index 000000000..8e9fc9cf2
--- /dev/null
+++ b/src/drivers/Quartz/Fl_Quartz_Image_Surface.H
@@ -0,0 +1,47 @@
+//
+// "$Id: Fl_Quartz_Image_Surface.H 11241 2016-02-27 13:52:27Z manolo $"
+//
+// Draw-to-image code for the Fast Light Tool Kit (FLTK).
+//
+// Copyright 1998-2016 by Bill Spitzak and others.
+//
+// This library is free software. Distribution and use rights are outlined in
+// the file "COPYING" which should have been included with this file.  If this
+// file is missing or damaged, see the license at:
+//
+//     http://www.fltk.org/COPYING.php
+//
+// Please report all bugs and problems on the following page:
+//
+//     http://www.fltk.org/str.php
+//
+
+#if !defined(FL_QUARTZ_IMAGE_SURFACE_H) && !defined(FL_DOXYGEN)
+#define FL_QUARTZ_IMAGE_SURFACE_H 1
+
+#include <FL/Fl_Image_Surface.H>
+
+class Fl_Image_Surface::Helper : public Fl_Widget_Surface {
+  friend class Fl_Image_Surface;
+public:
+  Fl_Offscreen offscreen;
+  Fl_Surface_Device *previous;
+  Window pre_window;
+  int was_high;
+  int width;
+  int height;
+  Helper(int w, int h, int high_res);
+  ~Helper();
+  void set_current();
+  void translate(int x, int y);
+  void untranslate();
+  int printable_rect(int *w, int *h) {*w = width; *h = height; return 0;}
+  Fl_RGB_Image *image();
+  void end_current();
+};
+
+#endif // FL_QUARTZ_IMAGE_SURFACE_H
+
+//
+// End of "$Id: Fl_Quartz_Image_Surface.H 11220 2016-02-26 12:51:47Z manolo $".
+//
diff --git a/src/drivers/Quartz/Fl_Quartz_Image_Surface.cxx b/src/drivers/Quartz/Fl_Quartz_Image_Surface.cxx
new file mode 100644
index 000000000..0349207fe
--- /dev/null
+++ b/src/drivers/Quartz/Fl_Quartz_Image_Surface.cxx
@@ -0,0 +1,107 @@
+//
+// "$Id: Fl_Quartz_Image_Surface.cxx 11278 2016-03-03 19:16:22Z manolo $"
+//
+// Draw-to-image code for the Fast Light Tool Kit (FLTK).
+//
+// Copyright 1998-2016 by Bill Spitzak and others.
+//
+// This library is free software. Distribution and use rights are outlined in
+// the file "COPYING" which should have been included with this file.  If this
+// file is missing or damaged, see the license at:
+//
+//     http://www.fltk.org/COPYING.php
+//
+// Please report all bugs and problems on the following page:
+//
+//     http://www.fltk.org/str.php
+//
+
+#include <FL/fl_draw.H>
+
+#include "config_lib.h"
+
+
+#ifdef FL_CFG_GFX_QUARTZ
+#include "Fl_Quartz_Graphics_Driver.H"
+#include "Fl_Quartz_Image_Surface.H"
+
+#include <ApplicationServices/ApplicationServices.h>
+
+
+Fl_Image_Surface::Helper::Helper(int w, int h, int high_res) : Fl_Widget_Surface(NULL), width(w), height(h) {
+  previous = 0;
+  int W = high_res ? 2*w : w;
+  int H = high_res ? 2*h : h;
+  CGColorSpaceRef lut = CGColorSpaceCreateDeviceRGB();
+  offscreen = CGBitmapContextCreate(calloc(W*H,4), W, H, 8, W*4, lut, kCGImageAlphaPremultipliedLast);
+  CGColorSpaceRelease(lut);
+  driver(new Fl_Quartz_Graphics_Driver);
+  CGContextTranslateCTM(offscreen, -0.5, 0.5); // as when drawing to a window
+  if (high_res) {
+    CGContextScaleCTM(offscreen, 2, 2);
+  }
+  CGContextSetShouldAntialias(offscreen, false);
+  CGContextSaveGState(offscreen);
+  CGContextTranslateCTM(offscreen, 0, height);
+  CGContextScaleCTM(offscreen, 1.0f, -1.0f);
+  CGContextSetRGBFillColor(offscreen, 1, 1, 1, 0);
+  CGContextFillRect(offscreen, CGRectMake(0,0,w,h));
+}
+
+Fl_Image_Surface::Helper::~Helper() {
+  if (offscreen) {
+    void *data = CGBitmapContextGetData((CGContextRef)offscreen);
+    free(data);
+    CGContextRelease((CGContextRef)offscreen);
+  }
+}
+
+void Fl_Image_Surface::Helper::set_current() {
+  pre_window = fl_window;
+  if (!previous) previous = Fl_Surface_Device::surface();
+  driver()->gc(offscreen);
+  fl_window = 0;
+  Fl_Surface_Device::set_current();
+  was_high = Fl_Display_Device::high_resolution();
+  Fl_X::set_high_resolution( CGBitmapContextGetWidth(offscreen) > width );
+}
+
+void Fl_Image_Surface::Helper::translate(int x, int y) {
+  CGContextRef gc = (CGContextRef)driver()->gc();
+  CGContextRestoreGState(gc);
+  CGContextSaveGState(gc);
+  CGContextTranslateCTM(gc, x, -y);
+  CGContextSaveGState(gc);
+  CGContextTranslateCTM(gc, 0, height);
+  CGContextScaleCTM(gc, 1.0f, -1.0f);
+}
+
+void Fl_Image_Surface::Helper::untranslate() {
+  CGContextRestoreGState((CGContextRef)driver()->gc());
+}
+
+Fl_RGB_Image* Fl_Image_Surface::Helper::image()
+{
+  unsigned char *data;
+  int W = width, H = height;
+  CGContextFlush(offscreen);
+  W = CGBitmapContextGetWidth(offscreen);
+  H = CGBitmapContextGetHeight(offscreen);
+  data = fl_read_image(NULL, 0, 0, W, H, 0);
+  Fl_RGB_Image *image = new Fl_RGB_Image(data, W, H);
+  image->alloc_array = 1;
+  return image;
+}
+
+void Fl_Image_Surface::Helper::end_current()
+{
+  Fl_X::set_high_resolution(was_high);
+  previous->Fl_Surface_Device::set_current();
+  fl_window = pre_window;
+}
+
+#endif // FL_CFG_GFX_QUARTZ
+
+//
+// End of "$Id: Fl_Quartz_Image_Surface.cxx 11220 2016-02-26 12:51:47Z manolo $".
+//