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-rw-r--r--src/drivers/Cocoa/Fl_Cocoa_Screen_Driver.H1
-rw-r--r--src/drivers/Cocoa/Fl_Cocoa_Screen_Driver.cxx45
-rw-r--r--src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.H1
-rw-r--r--src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.cxx100
-rw-r--r--src/drivers/X11/Fl_X11_Screen_Driver.H1
-rw-r--r--src/drivers/X11/Fl_X11_Screen_Driver.cxx456
6 files changed, 604 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 "$Id$".
//
diff --git a/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.H b/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.H
index f874750a7..a8c530fbe 100644
--- a/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.H
+++ b/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.H
@@ -71,6 +71,7 @@ public:
virtual void remove_timeout(Fl_Timeout_Handler cb, void *argp);
virtual int dnd(int unused);
virtual int compose(int &del);
+ virtual uchar *read_win_rectangle(uchar *p, int X, int Y, int w, int h, int alpha);
};
diff --git a/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.cxx b/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.cxx
index 7dd7df843..bf49eebd8 100644
--- a/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.cxx
+++ b/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.cxx
@@ -553,6 +553,106 @@ void Fl_Screen_Driver::font_name(int num, const char *name) {
s->first = 0;
}
+
+uchar * // O - Pixel buffer or NULL if failed
+Fl_WinAPI_Screen_Driver::read_win_rectangle(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)
+{
+ int d; // Depth of image
+
+ // Allocate the image data array as needed...
+ 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);
+
+ // Grab all of the pixels in the image...
+
+ // Assure that we are not trying to read non-existing data. If it is so, the
+ // function should still work, but the out-of-bounds part of the image is
+ // untouched (initialized with the alpha value or 0 (black), resp.).
+
+ int ww = w; // We need the original width for output data line size
+
+ int shift_x = 0; // X target shift if X modified
+ int shift_y = 0; // Y target shift if X modified
+
+ if (X < 0) {
+ shift_x = -X;
+ w += X;
+ X = 0;
+ }
+ if (Y < 0) {
+ shift_y = -Y;
+ h += Y;
+ Y = 0;
+ }
+
+ if (h < 1 || w < 1) return p; // nothing to copy
+
+ int line_size = ((3*w+3)/4) * 4; // each line is aligned on a DWORD (4 bytes)
+ uchar *dib = new uchar[line_size*h]; // create temporary buffer to read DIB
+
+ // fill in bitmap info for GetDIBits
+
+ BITMAPINFO bi;
+ bi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
+ bi.bmiHeader.biWidth = w;
+ bi.bmiHeader.biHeight = -h; // negative => top-down DIB
+ bi.bmiHeader.biPlanes = 1;
+ bi.bmiHeader.biBitCount = 24; // 24 bits RGB
+ bi.bmiHeader.biCompression = BI_RGB;
+ bi.bmiHeader.biSizeImage = 0;
+ bi.bmiHeader.biXPelsPerMeter = 0;
+ bi.bmiHeader.biYPelsPerMeter = 0;
+ bi.bmiHeader.biClrUsed = 0;
+ bi.bmiHeader.biClrImportant = 0;
+
+ // copy bitmap from original DC (Window, Fl_Offscreen, ...)
+ HDC gc = (HDC)fl_graphics_driver->gc();
+ HDC hdc = CreateCompatibleDC(gc);
+ HBITMAP hbm = CreateCompatibleBitmap(gc,w,h);
+
+ int save_dc = SaveDC(hdc); // save context for cleanup
+ SelectObject(hdc,hbm); // select bitmap
+ BitBlt(hdc,0,0,w,h,gc,X,Y,SRCCOPY); // copy image section to DDB
+
+ // copy RGB image data to the allocated DIB
+
+ GetDIBits(hdc, hbm, 0, h, dib, (BITMAPINFO *)&bi, DIB_RGB_COLORS);
+
+ // finally copy the image data to the user buffer
+
+ for (int j = 0; j<h; j++) {
+ const uchar *src = dib + j * line_size; // source line
+ uchar *tg = p + (j + shift_y) * d * ww + shift_x * d; // target line
+ for (int i = 0; i<w; i++) {
+ uchar b = *src++;
+ uchar g = *src++;
+ *tg++ = *src++; // R
+ *tg++ = g; // G
+ *tg++ = b; // B
+ if (alpha)
+ *tg++ = alpha; // alpha
+ }
+ }
+
+ // free used GDI and other structures
+
+ RestoreDC(hdc,save_dc); // reset DC
+ DeleteDC(hdc);
+ DeleteObject(hbm);
+ delete[] dib; // delete DIB temporary buffer
+
+ return p;
+}
+
//
// End of "$Id$".
// \ No newline at end of file
diff --git a/src/drivers/X11/Fl_X11_Screen_Driver.H b/src/drivers/X11/Fl_X11_Screen_Driver.H
index 2f89eaabf..f639fd6cb 100644
--- a/src/drivers/X11/Fl_X11_Screen_Driver.H
+++ b/src/drivers/X11/Fl_X11_Screen_Driver.H
@@ -77,6 +77,7 @@ public:
virtual int compose(int &del);
virtual void compose_reset();
virtual int text_display_can_leak();
+ virtual uchar *read_win_rectangle(uchar *p, int X, int Y, int w, int h, int alpha);
};
diff --git a/src/drivers/X11/Fl_X11_Screen_Driver.cxx b/src/drivers/X11/Fl_X11_Screen_Driver.cxx
index 50623664e..9e7c68af4 100644
--- a/src/drivers/X11/Fl_X11_Screen_Driver.cxx
+++ b/src/drivers/X11/Fl_X11_Screen_Driver.cxx
@@ -34,6 +34,17 @@
#include <X11/extensions/Xdbe.h>
#endif
+# include <X11/Xutil.h>
+# ifdef __sgi
+# include <X11/extensions/readdisplay.h>
+# else
+# include <stdlib.h>
+# endif // __sgi
+
+#ifdef DEBUG
+# include <stdio.h>
+#endif // DEBUG
+
extern Atom fl_NET_WORKAREA;
extern XIC fl_xim_ic; // in Fl_x.cxx
@@ -666,5 +677,450 @@ void Fl_Screen_Driver::font_name(int num, const char *name) {
}
//
+// 'fl_subimage_offsets()' - Calculate subimage offsets for an axis
+static inline int
+fl_subimage_offsets(int a, int aw, int b, int bw, int &obw)
+{
+ int off;
+ int ob;
+
+ if (b >= a) {
+ ob = b;
+ off = 0;
+ } else {
+ ob = a;
+ off = a - b;
+ }
+
+ bw -= off;
+
+ if (ob + bw <= a + aw) {
+ obw = bw;
+ } else {
+ obw = (a + aw) - ob;
+ }
+
+ return off;
+}
+
+// this handler will catch and ignore exceptions during XGetImage
+// to avoid an application crash
+extern "C" {
+ static int xgetimageerrhandler(Display *display, XErrorEvent *error) {
+ return 0;
+ }
+}
+
+uchar *Fl_X11_Screen_Driver::read_win_rectangle(uchar *p, int X, int Y, int w, int h, int alpha)
+{
+ XImage *image; // Captured image
+ int i, maxindex; // Looping vars
+ int x, y; // Current X & Y in image
+ int d; // Depth of image
+ unsigned char *line, // Array to hold image row
+ *line_ptr; // Pointer to current line image
+ unsigned char *pixel; // Current color value
+ XColor colors[4096]; // Colors from the colormap...
+ unsigned char cvals[4096][3]; // Color values from the colormap...
+ unsigned index_mask,
+ index_shift,
+ red_mask,
+ red_shift,
+ green_mask,
+ green_shift,
+ blue_mask,
+ blue_shift;
+ //
+ // Under X11 we have the option of the XGetImage() interface or SGI's
+ // ReadDisplay extension which does all of the really hard work for
+ // us...
+ //
+ int allow_outside = w < 0; // negative w allows negative X or Y, that is, window frame
+ if (w < 0) w = - w;
+
+# ifdef __sgi
+ if (XReadDisplayQueryExtension(fl_display, &i, &i)) {
+ image = XReadDisplay(fl_display, fl_window, X, Y, w, h, 0, NULL);
+ } else
+# else
+ image = 0;
+# endif // __sgi
+
+ if (!image) {
+ // fetch absolute coordinates
+ int dx, dy, sx, sy, sw, sh;
+ Window child_win;
+
+ Fl_Window *win;
+ if (allow_outside) win = (Fl_Window*)1;
+ else win = fl_find(fl_window);
+ if (win) {
+ XTranslateCoordinates(fl_display, fl_window,
+ RootWindow(fl_display, fl_screen), X, Y, &dx, &dy, &child_win);
+ // screen dimensions
+ Fl::screen_xywh(sx, sy, sw, sh, fl_screen);
+ }
+ if (!win || (dx >= sx && dy >= sy && dx + w <= sx+sw && dy + h <= sy+sh)) {
+ // the image is fully contained, we can use the traditional method
+ // however, if the window is obscured etc. the function will still fail. Make sure we
+ // catch the error and continue, otherwise an exception will be thrown.
+ XErrorHandler old_handler = XSetErrorHandler(xgetimageerrhandler);
+ image = XGetImage(fl_display, fl_window, X, Y, w, h, AllPlanes, ZPixmap);
+ XSetErrorHandler(old_handler);
+ } else {
+ // image is crossing borders, determine visible region
+ int nw, nh, noffx, noffy;
+ noffx = fl_subimage_offsets(sx, sw, dx, w, nw);
+ noffy = fl_subimage_offsets(sy, sh, dy, h, nh);
+ if (nw <= 0 || nh <= 0) return 0;
+
+ // allocate the image
+ int bpp = fl_visual->depth + ((fl_visual->depth / 8) % 2) * 8;
+ char* buf = (char*)malloc(bpp / 8 * w * h);
+ image = XCreateImage(fl_display, fl_visual->visual,
+ fl_visual->depth, ZPixmap, 0, buf, w, h, bpp, 0);
+ if (!image) {
+ if (buf) free(buf);
+ return 0;
+ }
+
+ XErrorHandler old_handler = XSetErrorHandler(xgetimageerrhandler);
+ XImage *subimg = XGetSubImage(fl_display, fl_window, X + noffx, Y + noffy,
+ nw, nh, AllPlanes, ZPixmap, image, noffx, noffy);
+ XSetErrorHandler(old_handler);
+ if (!subimg) {
+ XDestroyImage(image);
+ return 0;
+ }
+ }
+ }
+
+ if (!image) return 0;
+
+#ifdef DEBUG
+ printf("width = %d\n", image->width);
+ printf("height = %d\n", image->height);
+ printf("xoffset = %d\n", image->xoffset);
+ printf("format = %d\n", image->format);
+ printf("data = %p\n", image->data);
+ printf("byte_order = %d\n", image->byte_order);
+ printf("bitmap_unit = %d\n", image->bitmap_unit);
+ printf("bitmap_bit_order = %d\n", image->bitmap_bit_order);
+ printf("bitmap_pad = %d\n", image->bitmap_pad);
+ printf("depth = %d\n", image->depth);
+ printf("bytes_per_line = %d\n", image->bytes_per_line);
+ printf("bits_per_pixel = %d\n", image->bits_per_pixel);
+ printf("red_mask = %08x\n", image->red_mask);
+ printf("green_mask = %08x\n", image->green_mask);
+ printf("blue_mask = %08x\n", image->blue_mask);
+ printf("map_entries = %d\n", fl_visual->visual->map_entries);
+#endif // DEBUG
+
+ d = alpha ? 4 : 3;
+
+ // Allocate the image data array as needed...
+ if (!p) p = new uchar[w * h * d];
+
+ // Initialize the default colors/alpha in the whole image...
+ memset(p, alpha, w * h * d);
+
+ // Check that we have valid mask/shift values...
+ if (!image->red_mask && image->bits_per_pixel > 12) {
+ // Greater than 12 bits must be TrueColor...
+ image->red_mask = fl_visual->visual->red_mask;
+ image->green_mask = fl_visual->visual->green_mask;
+ image->blue_mask = fl_visual->visual->blue_mask;
+
+#ifdef DEBUG
+ // Defined in Fl_Xlib_Graphics_Driver_color.cxx
+ extern uchar fl_redmask, fl_greenmask, fl_bluemask;
+ extern int fl_redshift, fl_greenshift, fl_blueshift;
+ puts("\n---- UPDATED ----");
+ printf("fl_redmask = %08x\n", fl_redmask);
+ printf("fl_redshift = %d\n", fl_redshift);
+ printf("fl_greenmask = %08x\n", fl_greenmask);
+ printf("fl_greenshift = %d\n", fl_greenshift);
+ printf("fl_bluemask = %08x\n", fl_bluemask);
+ printf("fl_blueshift = %d\n", fl_blueshift);
+ printf("red_mask = %08x\n", image->red_mask);
+ printf("green_mask = %08x\n", image->green_mask);
+ printf("blue_mask = %08x\n", image->blue_mask);
+#endif // DEBUG
+ }
+
+ // Check if we have colormap image...
+ if (!image->red_mask) {
+ // Get the colormap entries for this window...
+ maxindex = fl_visual->visual->map_entries;
+
+ for (i = 0; i < maxindex; i ++) colors[i].pixel = i;
+
+ XQueryColors(fl_display, fl_colormap, colors, maxindex);
+
+ for (i = 0; i < maxindex; i ++) {
+ cvals[i][0] = colors[i].red >> 8;
+ cvals[i][1] = colors[i].green >> 8;
+ cvals[i][2] = colors[i].blue >> 8;
+ }
+
+ // Read the pixels and output an RGB image...
+ for (y = 0; y < image->height; y ++) {
+ pixel = (unsigned char *)(image->data + y * image->bytes_per_line);
+ line = p + y * w * d;
+
+ switch (image->bits_per_pixel) {
+ case 1 :
+ for (x = image->width, line_ptr = line, index_mask = 128;
+ x > 0;
+ x --, line_ptr += d) {
+ if (*pixel & index_mask) {
+ line_ptr[0] = cvals[1][0];
+ line_ptr[1] = cvals[1][1];
+ line_ptr[2] = cvals[1][2];
+ } else {
+ line_ptr[0] = cvals[0][0];
+ line_ptr[1] = cvals[0][1];
+ line_ptr[2] = cvals[0][2];
+ }
+
+ if (index_mask > 1) {
+ index_mask >>= 1;
+ } else {
+ index_mask = 128;
+ pixel ++;
+ }
+ }
+ break;
+
+ case 2 :
+ for (x = image->width, line_ptr = line, index_shift = 6;
+ x > 0;
+ x --, line_ptr += d) {
+ i = (*pixel >> index_shift) & 3;
+
+ line_ptr[0] = cvals[i][0];
+ line_ptr[1] = cvals[i][1];
+ line_ptr[2] = cvals[i][2];
+
+ if (index_shift > 0) {
+ index_mask >>= 2;
+ index_shift -= 2;
+ } else {
+ index_mask = 192;
+ index_shift = 6;
+ pixel ++;
+ }
+ }
+ break;
+
+ case 4 :
+ for (x = image->width, line_ptr = line, index_shift = 4;
+ x > 0;
+ x --, line_ptr += d) {
+ if (index_shift == 4) i = (*pixel >> 4) & 15;
+ else i = *pixel & 15;
+
+ line_ptr[0] = cvals[i][0];
+ line_ptr[1] = cvals[i][1];
+ line_ptr[2] = cvals[i][2];
+
+ if (index_shift > 0) {
+ index_shift = 0;
+ } else {
+ index_shift = 4;
+ pixel ++;
+ }
+ }
+ break;
+
+ case 8 :
+ for (x = image->width, line_ptr = line;
+ x > 0;
+ x --, line_ptr += d, pixel ++) {
+ line_ptr[0] = cvals[*pixel][0];
+ line_ptr[1] = cvals[*pixel][1];
+ line_ptr[2] = cvals[*pixel][2];
+ }
+ break;
+
+ case 12 :
+ for (x = image->width, line_ptr = line, index_shift = 0;
+ x > 0;
+ x --, line_ptr += d) {
+ if (index_shift == 0) {
+ i = ((pixel[0] << 4) | (pixel[1] >> 4)) & 4095;
+ } else {
+ i = ((pixel[1] << 8) | pixel[2]) & 4095;
+ }
+
+ line_ptr[0] = cvals[i][0];
+ line_ptr[1] = cvals[i][1];
+ line_ptr[2] = cvals[i][2];
+
+ if (index_shift == 0) {
+ index_shift = 4;
+ } else {
+ index_shift = 0;
+ pixel += 3;
+ }
+ }
+ break;
+ }
+ }
+ } else {
+ // RGB(A) image, so figure out the shifts & masks...
+ red_mask = image->red_mask;
+ red_shift = 0;
+
+ while ((red_mask & 1) == 0) {
+ red_mask >>= 1;
+ red_shift ++;
+ }
+
+ green_mask = image->green_mask;
+ green_shift = 0;
+
+ while ((green_mask & 1) == 0) {
+ green_mask >>= 1;
+ green_shift ++;
+ }
+
+ blue_mask = image->blue_mask;
+ blue_shift = 0;
+
+ while ((blue_mask & 1) == 0) {
+ blue_mask >>= 1;
+ blue_shift ++;
+ }
+
+ // Read the pixels and output an RGB image...
+ for (y = 0; y < image->height; y ++) {
+ pixel = (unsigned char *)(image->data + y * image->bytes_per_line);
+ line = p + y * w * d;
+
+ switch (image->bits_per_pixel) {
+ case 8 :
+ for (x = image->width, line_ptr = line;
+ x > 0;
+ x --, line_ptr += d, pixel ++) {
+ i = *pixel;
+
+ line_ptr[0] = 255 * ((i >> red_shift) & red_mask) / red_mask;
+ line_ptr[1] = 255 * ((i >> green_shift) & green_mask) / green_mask;
+ line_ptr[2] = 255 * ((i >> blue_shift) & blue_mask) / blue_mask;
+ }
+ break;
+
+ case 12 :
+ for (x = image->width, line_ptr = line, index_shift = 0;
+ x > 0;
+ x --, line_ptr += d) {
+ if (index_shift == 0) {
+ i = ((pixel[0] << 4) | (pixel[1] >> 4)) & 4095;
+ } else {
+ i = ((pixel[1] << 8) | pixel[2]) & 4095;
+ }
+
+ line_ptr[0] = 255 * ((i >> red_shift) & red_mask) / red_mask;
+ line_ptr[1] = 255 * ((i >> green_shift) & green_mask) / green_mask;
+ line_ptr[2] = 255 * ((i >> blue_shift) & blue_mask) / blue_mask;
+
+ if (index_shift == 0) {
+ index_shift = 4;
+ } else {
+ index_shift = 0;
+ pixel += 3;
+ }
+ }
+ break;
+
+ case 16 :
+ if (image->byte_order == LSBFirst) {
+ // Little-endian...
+ for (x = image->width, line_ptr = line;
+ x > 0;
+ x --, line_ptr += d, pixel += 2) {
+ i = (pixel[1] << 8) | pixel[0];
+
+ line_ptr[0] = 255 * ((i >> red_shift) & red_mask) / red_mask;
+ line_ptr[1] = 255 * ((i >> green_shift) & green_mask) / green_mask;
+ line_ptr[2] = 255 * ((i >> blue_shift) & blue_mask) / blue_mask;
+ }
+ } else {
+ // Big-endian...
+ for (x = image->width, line_ptr = line;
+ x > 0;
+ x --, line_ptr += d, pixel += 2) {
+ i = (pixel[0] << 8) | pixel[1];
+
+ line_ptr[0] = 255 * ((i >> red_shift) & red_mask) / red_mask;
+ line_ptr[1] = 255 * ((i >> green_shift) & green_mask) / green_mask;
+ line_ptr[2] = 255 * ((i >> blue_shift) & blue_mask) / blue_mask;
+ }
+ }
+ break;
+
+ case 24 :
+ if (image->byte_order == LSBFirst) {
+ // Little-endian...
+ for (x = image->width, line_ptr = line;
+ x > 0;
+ x --, line_ptr += d, pixel += 3) {
+ i = (((pixel[2] << 8) | pixel[1]) << 8) | pixel[0];
+
+ line_ptr[0] = 255 * ((i >> red_shift) & red_mask) / red_mask;
+ line_ptr[1] = 255 * ((i >> green_shift) & green_mask) / green_mask;
+ line_ptr[2] = 255 * ((i >> blue_shift) & blue_mask) / blue_mask;
+ }
+ } else {
+ // Big-endian...
+ for (x = image->width, line_ptr = line;
+ x > 0;
+ x --, line_ptr += d, pixel += 3) {
+ i = (((pixel[0] << 8) | pixel[1]) << 8) | pixel[2];
+
+ line_ptr[0] = 255 * ((i >> red_shift) & red_mask) / red_mask;
+ line_ptr[1] = 255 * ((i >> green_shift) & green_mask) / green_mask;
+ line_ptr[2] = 255 * ((i >> blue_shift) & blue_mask) / blue_mask;
+ }
+ }
+ break;
+
+ case 32 :
+ if (image->byte_order == LSBFirst) {
+ // Little-endian...
+ for (x = image->width, line_ptr = line;
+ x > 0;
+ x --, line_ptr += d, pixel += 4) {
+ i = (((((pixel[3] << 8) | pixel[2]) << 8) | pixel[1]) << 8) | pixel[0];
+
+ line_ptr[0] = 255 * ((i >> red_shift) & red_mask) / red_mask;
+ line_ptr[1] = 255 * ((i >> green_shift) & green_mask) / green_mask;
+ line_ptr[2] = 255 * ((i >> blue_shift) & blue_mask) / blue_mask;
+ }
+ } else {
+ // Big-endian...
+ for (x = image->width, line_ptr = line;
+ x > 0;
+ x --, line_ptr += d, pixel += 4) {
+ i = (((((pixel[0] << 8) | pixel[1]) << 8) | pixel[2]) << 8) | pixel[3];
+
+ line_ptr[0] = 255 * ((i >> red_shift) & red_mask) / red_mask;
+ line_ptr[1] = 255 * ((i >> green_shift) & green_mask) / green_mask;
+ line_ptr[2] = 255 * ((i >> blue_shift) & blue_mask) / blue_mask;
+ }
+ }
+ break;
+ }
+ }
+ }
+
+ // Destroy the X image we've read and return the RGB(A) image...
+ XDestroyImage(image);
+
+ return p;
+}
+
+//
// End of "$Id$".
//
generated by cgit v1.2.3 (git 2.25.1) at 2026-02-08 16:52:26 +0000