diff options
Diffstat (limited to 'src/drivers/Cocoa')
| -rw-r--r-- | src/drivers/Cocoa/Fl_Cocoa_Screen_Driver.H | 1 | ||||
| -rw-r--r-- | src/drivers/Cocoa/Fl_Cocoa_Screen_Driver.cxx | 45 |
2 files changed, 46 insertions, 0 deletions
diff --git a/src/drivers/Cocoa/Fl_Cocoa_Screen_Driver.H b/src/drivers/Cocoa/Fl_Cocoa_Screen_Driver.H index 59cd6ce1e..3f475a637 100644 --- a/src/drivers/Cocoa/Fl_Cocoa_Screen_Driver.H +++ b/src/drivers/Cocoa/Fl_Cocoa_Screen_Driver.H @@ -86,6 +86,7 @@ public: int insertion_point_location(int *px, int *py, int *pheight); virtual int dnd(int use_selection); virtual int compose(int &del); + virtual uchar *read_image(uchar *p, int x, int y, int w, int h, int alpha); }; diff --git a/src/drivers/Cocoa/Fl_Cocoa_Screen_Driver.cxx b/src/drivers/Cocoa/Fl_Cocoa_Screen_Driver.cxx index 2c9f693fc..c23046e30 100644 --- a/src/drivers/Cocoa/Fl_Cocoa_Screen_Driver.cxx +++ b/src/drivers/Cocoa/Fl_Cocoa_Screen_Driver.cxx @@ -325,6 +325,51 @@ void Fl_Screen_Driver::font_name(int num, const char *name) { s->first = 0; } +uchar * // O - Pixel buffer or NULL if failed +Fl_Cocoa_Screen_Driver::read_image(uchar *p, // I - Pixel buffer or NULL to allocate + int x, // I - Left position + int y, // I - Top position + int w, // I - Width of area to read + int h, // I - Height of area to read + int alpha) // I - Alpha value for image (0 for none) +{ + uchar *base; + int rowBytes, delta; + if (fl_window == NULL) { // reading from an offscreen buffer + CGContextRef src = (CGContextRef)Fl_Surface_Device::surface()->driver()->gc(); // get bitmap context + base = (uchar *)CGBitmapContextGetData(src); // get data + if(!base) return NULL; + int sw = CGBitmapContextGetWidth(src); + int sh = CGBitmapContextGetHeight(src); + rowBytes = CGBitmapContextGetBytesPerRow(src); + delta = CGBitmapContextGetBitsPerPixel(src)/8; + if( (sw - x < w) || (sh - y < h) ) return NULL; + } + else { // reading from current window + base = Fl_X::bitmap_from_window_rect(Fl_Window::current(),x,y,w,h,&delta); + if (!base) return NULL; + rowBytes = delta*w; + x = y = 0; + } + // Allocate the image data array as needed... + int d = alpha ? 4 : 3; + if (!p) p = new uchar[w * h * d]; + // Initialize the default colors/alpha in the whole image... + memset(p, alpha, w * h * d); + // Copy the image from the off-screen buffer to the memory buffer. + int idx, idy; // Current X & Y in image + uchar *pdst, *psrc; + for (idy = y, pdst = p; idy < h + y; idy ++) { + for (idx = 0, psrc = base + idy * rowBytes + x * delta; idx < w; idx ++, psrc += delta, pdst += d) { + pdst[0] = psrc[0]; // R + pdst[1] = psrc[1]; // G + pdst[2] = psrc[2]; // B + } + } + if(fl_window != NULL) delete[] base; + return p; +} + // // End of "$Id$". // |