porting dcscreen blit from 2.8

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@56132 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

Makefile.in

@@ -11859,6 +11859,7 @@ COND_PLATFORM_MACOSX_1___OSX_CARBON_COCOA_SRC_OBJECTS =  \
 	monodll_dcclient.o \
 	monodll_dcprint.o \
 	monodll_dcscreen.o \
+	monodll_glgrab.o \
 	monodll_graphics.o \
 	monodll_dnd.o \
 	monodll_font.o \
@@ -12019,6 +12020,7 @@ COND_PLATFORM_MACOSX_1___OSX_CARBON_COCOA_SRC_OBJECTS_0 =  \
 	monolib_dcclient.o \
 	monolib_dcprint.o \
 	monolib_dcscreen.o \
+	monolib_glgrab.o \
 	monolib_graphics.o \
 	monolib_dnd.o \
 	monolib_font.o \
@@ -12179,6 +12181,7 @@ COND_PLATFORM_MACOSX_1___OSX_CARBON_COCOA_SRC_OBJECTS_8 =  \
 	coredll_dcclient.o \
 	coredll_dcprint.o \
 	coredll_dcscreen.o \
+	coredll_glgrab.o \
 	coredll_graphics.o \
 	coredll_dnd.o \
 	coredll_font.o \
@@ -12259,6 +12262,7 @@ COND_PLATFORM_MACOSX_1___OSX_CARBON_COCOA_SRC_OBJECTS_9 =  \
 	corelib_dcclient.o \
 	corelib_dcprint.o \
 	corelib_dcscreen.o \
+	corelib_glgrab.o \
 	corelib_graphics.o \
 	corelib_dnd.o \
 	corelib_font.o \
@@ -17929,6 +17933,12 @@ monodll_sound_sdl.o: $(srcdir)/src/unix/sound_sdl.cpp $(MONODLL_ODEP)
 @COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_COCOA_USE_GUI_1_WXUNIV_0@monodll_fontdlgosx.o: $(srcdir)/src/osx/carbon/fontdlgosx.mm $(MONODLL_ODEP)
 @COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_COCOA_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $(srcdir)/src/osx/carbon/fontdlgosx.mm
 
+@COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_CARBON_USE_GUI_1_WXUNIV_0@monodll_glgrab.o: $(srcdir)/src/osx/core/glgrab.cpp $(MONODLL_ODEP)
+@COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_CARBON_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $(srcdir)/src/osx/core/glgrab.cpp
+
+@COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_COCOA_USE_GUI_1_WXUNIV_0@monodll_glgrab.o: $(srcdir)/src/osx/core/glgrab.cpp $(MONODLL_ODEP)
+@COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_COCOA_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $(srcdir)/src/osx/core/glgrab.cpp
+
 @COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_CARBON_USE_GUI_1_WXUNIV_0@monodll_statbrma.o: $(srcdir)/src/osx/carbon/statbrma.cpp $(MONODLL_ODEP)
 @COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_CARBON_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $(srcdir)/src/osx/carbon/statbrma.cpp
 
@@ -22597,6 +22607,12 @@ monolib_sound_sdl.o: $(srcdir)/src/unix/sound_sdl.cpp $(MONOLIB_ODEP)
 @COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_COCOA_USE_GUI_1_WXUNIV_0@monolib_fontdlgosx.o: $(srcdir)/src/osx/carbon/fontdlgosx.mm $(MONOLIB_ODEP)
 @COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_COCOA_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $(srcdir)/src/osx/carbon/fontdlgosx.mm
 
+@COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_CARBON_USE_GUI_1_WXUNIV_0@monolib_glgrab.o: $(srcdir)/src/osx/core/glgrab.cpp $(MONOLIB_ODEP)
+@COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_CARBON_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $(srcdir)/src/osx/core/glgrab.cpp
+
+@COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_COCOA_USE_GUI_1_WXUNIV_0@monolib_glgrab.o: $(srcdir)/src/osx/core/glgrab.cpp $(MONOLIB_ODEP)
+@COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_COCOA_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $(srcdir)/src/osx/core/glgrab.cpp
+
 @COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_CARBON_USE_GUI_1_WXUNIV_0@monolib_statbrma.o: $(srcdir)/src/osx/carbon/statbrma.cpp $(MONOLIB_ODEP)
 @COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_CARBON_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $(srcdir)/src/osx/carbon/statbrma.cpp
 
@@ -27478,6 +27494,12 @@ coredll_win32.o: $(srcdir)/src/univ/themes/win32.cpp $(COREDLL_ODEP)
 @COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_COCOA_USE_GUI_1_WXUNIV_0@coredll_fontdlgosx.o: $(srcdir)/src/osx/carbon/fontdlgosx.mm $(COREDLL_ODEP)
 @COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_COCOA_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(COREDLL_CXXFLAGS) $(srcdir)/src/osx/carbon/fontdlgosx.mm
 
+@COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_CARBON_USE_GUI_1_WXUNIV_0@coredll_glgrab.o: $(srcdir)/src/osx/core/glgrab.cpp $(COREDLL_ODEP)
+@COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_CARBON_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(COREDLL_CXXFLAGS) $(srcdir)/src/osx/core/glgrab.cpp
+
+@COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_COCOA_USE_GUI_1_WXUNIV_0@coredll_glgrab.o: $(srcdir)/src/osx/core/glgrab.cpp $(COREDLL_ODEP)
+@COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_COCOA_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(COREDLL_CXXFLAGS) $(srcdir)/src/osx/core/glgrab.cpp
+
 @COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_CARBON_USE_GUI_1_WXUNIV_0@coredll_statbrma.o: $(srcdir)/src/osx/carbon/statbrma.cpp $(COREDLL_ODEP)
 @COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_CARBON_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(COREDLL_CXXFLAGS) $(srcdir)/src/osx/carbon/statbrma.cpp
 
@@ -30973,6 +30995,12 @@ corelib_win32.o: $(srcdir)/src/univ/themes/win32.cpp $(CORELIB_ODEP)
 @COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_COCOA_USE_GUI_1_WXUNIV_0@corelib_fontdlgosx.o: $(srcdir)/src/osx/carbon/fontdlgosx.mm $(CORELIB_ODEP)
 @COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_COCOA_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(CORELIB_CXXFLAGS) $(srcdir)/src/osx/carbon/fontdlgosx.mm
 
+@COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_CARBON_USE_GUI_1_WXUNIV_0@corelib_glgrab.o: $(srcdir)/src/osx/core/glgrab.cpp $(CORELIB_ODEP)
+@COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_CARBON_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(CORELIB_CXXFLAGS) $(srcdir)/src/osx/core/glgrab.cpp
+
+@COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_COCOA_USE_GUI_1_WXUNIV_0@corelib_glgrab.o: $(srcdir)/src/osx/core/glgrab.cpp $(CORELIB_ODEP)
+@COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_COCOA_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(CORELIB_CXXFLAGS) $(srcdir)/src/osx/core/glgrab.cpp
+
 @COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_CARBON_USE_GUI_1_WXUNIV_0@corelib_statbrma.o: $(srcdir)/src/osx/carbon/statbrma.cpp $(CORELIB_ODEP)
 @COND_PLATFORM_MACOSX_1_TOOLKIT_OSX_CARBON_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(CORELIB_CXXFLAGS) $(srcdir)/src/osx/carbon/statbrma.cpp
 

configure

@@ -46979,7 +46979,7 @@ if test "$wxUSE_MAC" = 1 ; then
         fi
     fi
     if test "$USE_DARWIN" = 1; then
-        LDFLAGS="$LDFLAGS -framework IOKit -framework Carbon -framework Cocoa -framework AudioToolbox -framework System"
+        LDFLAGS="$LDFLAGS -framework IOKit -framework Carbon -framework Cocoa -framework AudioToolbox -framework System -framework OpenGL"
     fi
 fi
 if test "$wxUSE_COCOA" = 1 ; then

configure.in

@@ -7355,7 +7355,7 @@ if test "$wxUSE_MAC" = 1 ; then
         fi
     fi
     if test "$USE_DARWIN" = 1; then
-        LDFLAGS="$LDFLAGS -framework IOKit -framework Carbon -framework Cocoa -framework AudioToolbox -framework System"
+        LDFLAGS="$LDFLAGS -framework IOKit -framework Carbon -framework Cocoa -framework AudioToolbox -framework System -framework OpenGL"
     fi
 fi
 if test "$wxUSE_COCOA" = 1 ; then

include/wx/osx/carbon/dcscreen.h

@@ -21,6 +21,7 @@ public:
     wxScreenDCImpl( wxDC *owner );
     virtual ~wxScreenDCImpl();
 
+    virtual wxBitmap DoGetAsBitmap(const wxRect *subrect) const;
 private:
     void* m_overlayWindow;
         

include/wx/osx/private/glgrab.h

@@ -0,0 +1,12 @@
+#include <CoreFoundation/CoreFoundation.h>
+
+#if defined __cplusplus
+    extern "C" {
+#endif
+
+    CGImageRef grabViaOpenGL(CGDirectDisplayID display, CGRect srcRect);
+
+#if defined __cplusplus
+    }
+#endif
+

src/osx/carbon/dcscreen.cpp

@@ -16,6 +16,7 @@
 
 #include "wx/osx/private.h"
 #include "wx/graphics.h"
+#include "wx/osx/private/glgrab.h"
 
 IMPLEMENT_ABSTRACT_CLASS(wxScreenDCImpl, wxWindowDCImpl)
 
@@ -57,3 +58,37 @@ wxScreenDCImpl::~wxScreenDCImpl()
     DisposeWindow((WindowRef) m_overlayWindow );
 #endif
 }
+
+wxBitmap wxScreenDCImpl::DoGetAsBitmap(const wxRect *subrect) const
+{
+    CGRect srcRect = CGRectMake(0, 0, m_width, m_height);
+    if (subrect)
+    {
+        srcRect.origin.x = subrect->GetX();
+        srcRect.origin.y = subrect->GetY();
+        srcRect.size.width = subrect->GetWidth();
+        srcRect.size.height = subrect->GetHeight();
+    }
+    
+    wxBitmap bmp = wxBitmap(srcRect.size.width, srcRect.size.height, 32);
+    
+    CGContextRef context = (CGContextRef)bmp.GetHBITMAP();
+    
+    CGContextSaveGState(context);
+    
+    CGContextTranslateCTM( context, 0,  m_height );
+    CGContextScaleCTM( context, 1, -1 );
+    
+    if ( subrect )
+        srcRect = CGRectOffset( srcRect, -subrect->x, -subrect->y ) ;
+    
+    CGImageRef image = grabViaOpenGL(kCGNullDirectDisplay, srcRect);
+    
+    wxASSERT_MSG(image, wxT("wxScreenDC::GetAsBitmap - unable to get screenshot."));
+    
+    CGContextDrawImage(context, srcRect, image);
+    
+    CGContextRestoreGState(context);
+
+    return bmp;
+}

src/osx/core/glgrab.cpp

@@ -0,0 +1,214 @@
+/*
+ IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc. ("Apple") in
+ consideration of your agreement to the following terms, and your use, installation or modification
+ of this Apple software constitutes acceptance of these terms. If you do not agree with these terms,
+ please do not use, install or modify this Apple software.
+ 
+ In consideration of your agreement to abide by the following terms, and subject to these
+ terms, Apple grants you a personal, non-exclusive license, under Apple\xd5s copyrights in
+ this original Apple software (the "Apple Software"), to use and modify the Apple Software,
+ with or without modifications, in source and/or binary forms; provided that if you redistribute
+ the Apple Software in its entirety and without modifications, you must retain this notice and
+ the following text and disclaimers in all such redistributions of the Apple Software.
+ Neither the name, trademarks, service marks or logos of Apple Computer, Inc. may be used
+ to endorse or promote products derived from the Apple Software without specific prior
+ written permission from Apple. Except as expressly tated in this notice, no other rights or
+ licenses, express or implied, are granted by Apple herein, including but not limited
+ to any patent rights that may be infringed by your derivative works or by other works
+ in which the Apple Software may be incorporated.
+ 
+ The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO WARRANTIES,
+ EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF NON-INFRINGEMENT,
+ MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS
+ USE AND OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
+ 
+ IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+          OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE,
+ REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND
+ WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR
+ OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#import <CoreFoundation/CoreFoundation.h>
+#import <ApplicationServices/ApplicationServices.h>
+#import <OpenGL/OpenGL.h>
+#import <OpenGL/gl.h>
+
+#include "wx/osx/private/glgrab.h"
+
+extern CGColorSpaceRef wxMacGetGenericRGBColorSpace();
+
+/*
+ * perform an in-place swap from Quadrant 1 to Quadrant III format
+ * (upside-down PostScript/GL to right side up QD/CG raster format)
+ * We do this in-place, which requires more copying, but will touch
+ * only half the pages.  (Display grabs are BIG!)
+ *
+ * Pixel reformatting may optionally be done here if needed.
+ */
+static void swizzleBitmap(void * data, int rowBytes, int height)
+{
+    int top, bottom;
+    void * buffer;
+    void * topP;
+    void * bottomP;
+    void * base;
+    
+    
+    top = 0;
+    bottom = height - 1;
+    base = data;
+    buffer = malloc(rowBytes);
+    
+    
+    while ( top < bottom )
+    {
+        topP = (void *)((top * rowBytes) + (intptr_t)base);
+        bottomP = (void *)((bottom * rowBytes) + (intptr_t)base);
+        
+        
+        /*
+         * Save and swap scanlines.
+         *
+         * This code does a simple in-place exchange with a temp buffer.
+         * If you need to reformat the pixels, replace the first two bcopy()
+         * calls with your own custom pixel reformatter.
+         */
+        bcopy( topP, buffer, rowBytes );
+        bcopy( bottomP, topP, rowBytes );
+        bcopy( buffer, bottomP, rowBytes );
+        
+        ++top;
+        --bottom;
+    }
+    free( buffer );
+}
+
+
+/*
+ * Given a display ID and a rectangle on that display, generate a CGImageRef
+ * containing the display contents.
+ *
+ * srcRect is display-origin relative.
+ *
+ * This function uses a full screen OpenGL read-only context.
+ * By using OpenGL, we can read the screen using a DMA transfer
+ * when it's in millions of colors mode, and we can correctly read
+ * a microtiled full screen OpenGL context, such as a game or full
+ * screen video display.
+ *
+ * Returns a CGImageRef. When you are done with the CGImageRef, release it
+ * using CFRelease().
+ * Returns NULL on an error.
+ */
+  
+CGImageRef grabViaOpenGL(CGDirectDisplayID display, CGRect srcRect)
+{
+    CGContextRef bitmap;
+    CGImageRef image;
+    void * data;
+    long bytewidth;
+    GLint width, height;
+    long bytes;
+    
+    CGLContextObj    glContextObj;
+    CGLPixelFormatObj pixelFormatObj ;
+    GLint numPixelFormats ;
+    CGLPixelFormatAttribute attribs[] =
+    {
+        kCGLPFAFullScreen,
+        kCGLPFADisplayMask,
+        (CGLPixelFormatAttribute) 0,    /* Display mask bit goes here */
+        (CGLPixelFormatAttribute) 0
+    } ;
+    
+    
+    if ( display == kCGNullDirectDisplay )
+        display = CGMainDisplayID();
+    attribs[2] = (CGLPixelFormatAttribute) CGDisplayIDToOpenGLDisplayMask(display);
+    
+    
+    /* Build a full-screen GL context */
+    CGLChoosePixelFormat( attribs, &pixelFormatObj, &numPixelFormats );
+    if ( pixelFormatObj == NULL )    // No full screen context support
+        return NULL;
+    CGLCreateContext( pixelFormatObj, NULL, &glContextObj ) ;
+    CGLDestroyPixelFormat( pixelFormatObj ) ;
+    if ( glContextObj == NULL )
+        return NULL;
+    
+    
+    CGLSetCurrentContext( glContextObj ) ;
+    CGLSetFullScreen( glContextObj ) ;
+    
+    
+    glReadBuffer(GL_FRONT);
+    
+    
+    width = srcRect.size.width;
+    height = srcRect.size.height;
+    
+    
+    bytewidth = width * 4; // Assume 4 bytes/pixel for now
+    bytewidth = (bytewidth + 3) & ~3; // Align to 4 bytes
+    bytes = bytewidth * height; // width * height
+    
+    /* Build bitmap context */
+    data = malloc(height * bytewidth);
+    if ( data == NULL )
+    {
+        CGLSetCurrentContext( NULL );
+        CGLClearDrawable( glContextObj ); // disassociate from full screen
+        CGLDestroyContext( glContextObj ); // and destroy the context
+        return NULL;
+    }
+    bitmap = CGBitmapContextCreate(data, width, height, 8, bytewidth,
+                                   wxMacGetGenericRGBColorSpace(), kCGImageAlphaNoneSkipFirst /* XRGB */);
+    
+    
+    /* Read framebuffer into our bitmap */
+    glFinish(); /* Finish all OpenGL commands */
+    glPixelStorei(GL_PACK_ALIGNMENT, 4); /* Force 4-byte alignment */
+    glPixelStorei(GL_PACK_ROW_LENGTH, 0);
+    glPixelStorei(GL_PACK_SKIP_ROWS, 0);
+    glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
+    
+    /*
+     * Fetch the data in XRGB format, matching the bitmap context.
+     */
+    glReadPixels((GLint)srcRect.origin.x, (GLint)srcRect.origin.y, width, height,
+                 GL_BGRA,
+#ifdef __BIG_ENDIAN__
+                 GL_UNSIGNED_INT_8_8_8_8_REV, // for PPC
+#else
+                 GL_UNSIGNED_INT_8_8_8_8, // for Intel! http://lists.apple.com/archives/quartz-dev/2006/May/msg00100.html
+#endif
+                 data);
+    /*
+     * glReadPixels generates a quadrant I raster, with origin in the lower left
+     * This isn't a problem for signal processing routines such as compressors,
+     * as they can simply use a negative 'advance' to move between scanlines.
+     * CGImageRef and CGBitmapContext assume a quadrant III raster, though, so we need to
+     * invert it. Pixel reformatting can also be done here.
+     */
+    swizzleBitmap(data, bytewidth, height);
+    
+    
+    /* Make an image out of our bitmap; does a cheap vm_copy of the bitmap */
+    image = CGBitmapContextCreateImage(bitmap);
+    
+    /* Get rid of bitmap */
+    CFRelease(bitmap);
+    free(data);
+    
+    
+    /* Get rid of GL context */
+    CGLSetCurrentContext( NULL );
+    CGLClearDrawable( glContextObj ); // disassociate from full screen
+    CGLDestroyContext( glContextObj ); // and destroy the context
+    
+    /* Returned image has a reference count of 1 */
+    return image;
+}
+