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/*
* Fl_Gl_Printer.cxx
*/
#include "FL/Fl_Gl_Printer.H"
#include "Fl_Gl_Choice.H"
#include "FL/Fl.H"
#ifndef __APPLE__
#include "FL/fl_draw.H"
#endif
void Fl_Gl_Printer::print_gl_window(Fl_Gl_Window *glw, int x, int y)
{
#ifdef WIN32
HDC save_gc = fl_gc;
const int bytesperpixel = 3;
#elif defined(__APPLE__)
CGContextRef save_gc = fl_gc;
const int bytesperpixel = 4;
#else
_XGC *save_gc = fl_gc; // FIXME Linux/Unix
const int bytesperpixel = 3;
#endif
glw->redraw();
Fl::check();
glw->make_current();
// select front buffer as our source for pixel data
glReadBuffer(GL_FRONT);
// Read OpenGL context pixels directly.
// For extra safety, save & restore OpenGL states that are changed
glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
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);
// Read a block of pixels from the frame buffer
int mByteWidth = glw->w() * bytesperpixel;
mByteWidth = (mByteWidth + 3) & ~3; // Align to 4 bytes
uchar *baseAddress = (uchar*)malloc(mByteWidth * glw->h());
glReadPixels(0, 0, glw->w(), glw->h(),
#ifdef WIN32
GL_RGB, GL_UNSIGNED_BYTE,
#elif defined(__APPLE__)
GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV,
#else // FIXME Linux/Unix
GL_RGB, GL_UNSIGNED_BYTE,
#endif
baseAddress);
glPopClientAttrib();
fl_gc = save_gc;
#ifdef WIN32
fl_draw_image(baseAddress + (glw->h() - 1) * mByteWidth, x, y , glw->w(), glw->h(), bytesperpixel, - mByteWidth);
#elif defined(__APPLE__)
CGColorSpaceRef cSpace = CGColorSpaceCreateWithName (kCGColorSpaceGenericRGB);
CGContextRef bitmap = CGBitmapContextCreate(baseAddress, glw->w(), glw->h(), 8, mByteWidth, cSpace,
#if __BIG_ENDIAN__
kCGImageAlphaNoneSkipFirst | kCGBitmapByteOrder32Big /* XRGB Big Endian */);
#else
kCGImageAlphaNoneSkipFirst | kCGBitmapByteOrder32Little /* XRGB Little Endian */);
#endif
if(bitmap == NULL) return;
CFRelease(cSpace);
// Make an image out of our bitmap
CGImageRef image = CGBitmapContextCreateImage(bitmap);
if(image == NULL) return;
CFRelease(bitmap);
CGContextSaveGState(fl_gc);
int w, h;
this->printable_rect(&w, &h);
CGContextTranslateCTM(fl_gc, 0, h);
CGContextScaleCTM(fl_gc, 1.0f, -1.0f);
CGRect rect = { { x, h - y - glw->h() }, { glw->w(), glw->h() } };
Fl_X::q_begin_image(rect, 0, 0, glw->w(), glw->h());
CGContextDrawImage(fl_gc, rect, image);
Fl_X::q_end_image();
CGContextRestoreGState(fl_gc);
CFRelease(image);
#else // FIXME Linux/Unix
fl_draw_image(baseAddress + (glw->h() - 1) * mByteWidth, x, y , glw->w(), glw->h(), bytesperpixel, - mByteWidth);
#endif // WIN32
free(baseAddress);
}
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