mirror of https://github.com/fltk/fltk
Fix for issue #159.
This commit is contained in:
ManoloFLTK
parent
3ec51f0b80
commit
e52e057cdf
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@ -839,31 +839,11 @@ Fl_RGB_Image *Fl_X11_Screen_Driver::read_win_rectangle(int X, int Y, int w, int
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}
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}
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if (!image) return 0;
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if (s != 1) {
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w = ws;
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h = hs;
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}
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#ifdef DEBUG
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printf("width = %d\n", image->width);
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printf("height = %d\n", image->height);
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printf("xoffset = %d\n", image->xoffset);
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printf("format = %d\n", image->format);
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printf("data = %p\n", image->data);
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printf("byte_order = %d\n", image->byte_order);
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printf("bitmap_unit = %d\n", image->bitmap_unit);
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printf("bitmap_bit_order = %d\n", image->bitmap_bit_order);
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printf("bitmap_pad = %d\n", image->bitmap_pad);
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printf("depth = %d\n", image->depth);
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printf("bytes_per_line = %d\n", image->bytes_per_line);
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printf("bits_per_pixel = %d\n", image->bits_per_pixel);
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printf("red_mask = %08x\n", image->red_mask);
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printf("green_mask = %08x\n", image->green_mask);
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printf("blue_mask = %08x\n", image->blue_mask);
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printf("map_entries = %d\n", fl_visual->visual->map_entries);
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#endif // DEBUG
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const int d = 3; // Depth of image
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uchar *p = NULL;
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// Allocate the image data array as needed...
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@ -871,299 +851,318 @@ Fl_RGB_Image *Fl_X11_Screen_Driver::read_win_rectangle(int X, int Y, int w, int
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// Initialize the default colors/alpha in the whole image...
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memset(p, 0, w * h * d);
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// Check that we have valid mask/shift values...
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if (!image->red_mask && image->bits_per_pixel > 12) {
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// Greater than 12 bits must be TrueColor...
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image->red_mask = fl_visual->visual->red_mask;
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image->green_mask = fl_visual->visual->green_mask;
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image->blue_mask = fl_visual->visual->blue_mask;
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if (image) {
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#ifdef DEBUG
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// Defined in Fl_Xlib_Graphics_Driver_color.cxx
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extern uchar fl_redmask, fl_greenmask, fl_bluemask;
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extern int fl_redshift, fl_greenshift, fl_blueshift;
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puts("\n---- UPDATED ----");
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printf("fl_redmask = %08x\n", fl_redmask);
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printf("fl_redshift = %d\n", fl_redshift);
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printf("fl_greenmask = %08x\n", fl_greenmask);
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printf("fl_greenshift = %d\n", fl_greenshift);
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printf("fl_bluemask = %08x\n", fl_bluemask);
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printf("fl_blueshift = %d\n", fl_blueshift);
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printf("width = %d\n", image->width);
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printf("height = %d\n", image->height);
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printf("xoffset = %d\n", image->xoffset);
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printf("format = %d\n", image->format);
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printf("data = %p\n", image->data);
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printf("byte_order = %d\n", image->byte_order);
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printf("bitmap_unit = %d\n", image->bitmap_unit);
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printf("bitmap_bit_order = %d\n", image->bitmap_bit_order);
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printf("bitmap_pad = %d\n", image->bitmap_pad);
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printf("depth = %d\n", image->depth);
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printf("bytes_per_line = %d\n", image->bytes_per_line);
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printf("bits_per_pixel = %d\n", image->bits_per_pixel);
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printf("red_mask = %08x\n", image->red_mask);
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printf("green_mask = %08x\n", image->green_mask);
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printf("blue_mask = %08x\n", image->blue_mask);
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printf("map_entries = %d\n", fl_visual->visual->map_entries);
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#endif // DEBUG
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}
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// Check if we have colormap image...
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if (!image->red_mask) {
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// Get the colormap entries for this window...
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maxindex = fl_visual->visual->map_entries;
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// Check that we have valid mask/shift values...
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if (!image->red_mask && image->bits_per_pixel > 12) {
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// Greater than 12 bits must be TrueColor...
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image->red_mask = fl_visual->visual->red_mask;
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image->green_mask = fl_visual->visual->green_mask;
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image->blue_mask = fl_visual->visual->blue_mask;
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for (i = 0; i < maxindex; i ++) colors[i].pixel = i;
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XQueryColors(fl_display, fl_colormap, colors, maxindex);
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for (i = 0; i < maxindex; i ++) {
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cvals[i][0] = colors[i].red >> 8;
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cvals[i][1] = colors[i].green >> 8;
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cvals[i][2] = colors[i].blue >> 8;
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#ifdef DEBUG
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// Defined in Fl_Xlib_Graphics_Driver_color.cxx
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extern uchar fl_redmask, fl_greenmask, fl_bluemask;
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extern int fl_redshift, fl_greenshift, fl_blueshift;
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puts("\n---- UPDATED ----");
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printf("fl_redmask = %08x\n", fl_redmask);
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printf("fl_redshift = %d\n", fl_redshift);
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printf("fl_greenmask = %08x\n", fl_greenmask);
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printf("fl_greenshift = %d\n", fl_greenshift);
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printf("fl_bluemask = %08x\n", fl_bluemask);
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printf("fl_blueshift = %d\n", fl_blueshift);
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printf("red_mask = %08x\n", image->red_mask);
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printf("green_mask = %08x\n", image->green_mask);
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printf("blue_mask = %08x\n", image->blue_mask);
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#endif // DEBUG
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}
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// Read the pixels and output an RGB image...
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for (y = 0; y < image->height; y ++) {
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pixel = (unsigned char *)(image->data + y * image->bytes_per_line);
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line = p + y * w * d;
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// Check if we have colormap image...
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if (!image->red_mask) {
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// Get the colormap entries for this window...
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maxindex = fl_visual->visual->map_entries;
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switch (image->bits_per_pixel) {
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case 1 :
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for (x = image->width, line_ptr = line, index_mask = 128;
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x > 0;
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x --, line_ptr += d) {
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if (*pixel & index_mask) {
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line_ptr[0] = cvals[1][0];
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line_ptr[1] = cvals[1][1];
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line_ptr[2] = cvals[1][2];
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} else {
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line_ptr[0] = cvals[0][0];
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line_ptr[1] = cvals[0][1];
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line_ptr[2] = cvals[0][2];
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for (i = 0; i < maxindex; i ++) colors[i].pixel = i;
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XQueryColors(fl_display, fl_colormap, colors, maxindex);
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for (i = 0; i < maxindex; i ++) {
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cvals[i][0] = colors[i].red >> 8;
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cvals[i][1] = colors[i].green >> 8;
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cvals[i][2] = colors[i].blue >> 8;
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}
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// Read the pixels and output an RGB image...
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for (y = 0; y < image->height; y ++) {
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pixel = (unsigned char *)(image->data + y * image->bytes_per_line);
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line = p + y * w * d;
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switch (image->bits_per_pixel) {
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case 1 :
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for (x = image->width, line_ptr = line, index_mask = 128;
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x > 0;
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x --, line_ptr += d) {
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if (*pixel & index_mask) {
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line_ptr[0] = cvals[1][0];
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line_ptr[1] = cvals[1][1];
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line_ptr[2] = cvals[1][2];
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} else {
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line_ptr[0] = cvals[0][0];
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line_ptr[1] = cvals[0][1];
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line_ptr[2] = cvals[0][2];
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}
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if (index_mask > 1) {
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index_mask >>= 1;
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} else {
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index_mask = 128;
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pixel ++;
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}
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}
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break;
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if (index_mask > 1) {
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index_mask >>= 1;
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} else {
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index_mask = 128;
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pixel ++;
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case 2 :
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for (x = image->width, line_ptr = line, index_shift = 6;
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x > 0;
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x --, line_ptr += d) {
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i = (*pixel >> index_shift) & 3;
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line_ptr[0] = cvals[i][0];
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line_ptr[1] = cvals[i][1];
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line_ptr[2] = cvals[i][2];
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if (index_shift > 0) {
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index_shift -= 2;
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} else {
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index_shift = 6;
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pixel ++;
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}
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}
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}
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break;
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break;
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case 2 :
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for (x = image->width, line_ptr = line, index_shift = 6;
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x > 0;
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x --, line_ptr += d) {
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i = (*pixel >> index_shift) & 3;
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case 4 :
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for (x = image->width, line_ptr = line, index_shift = 4;
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x > 0;
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x --, line_ptr += d) {
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if (index_shift == 4) i = (*pixel >> 4) & 15;
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else i = *pixel & 15;
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line_ptr[0] = cvals[i][0];
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line_ptr[1] = cvals[i][1];
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line_ptr[2] = cvals[i][2];
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line_ptr[0] = cvals[i][0];
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line_ptr[1] = cvals[i][1];
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line_ptr[2] = cvals[i][2];
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if (index_shift > 0) {
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index_shift -= 2;
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} else {
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index_shift = 6;
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pixel ++;
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if (index_shift > 0) {
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index_shift = 0;
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} else {
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index_shift = 4;
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pixel ++;
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}
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}
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}
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break;
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break;
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case 4 :
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for (x = image->width, line_ptr = line, index_shift = 4;
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x > 0;
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x --, line_ptr += d) {
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if (index_shift == 4) i = (*pixel >> 4) & 15;
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else i = *pixel & 15;
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line_ptr[0] = cvals[i][0];
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line_ptr[1] = cvals[i][1];
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line_ptr[2] = cvals[i][2];
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if (index_shift > 0) {
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index_shift = 0;
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} else {
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index_shift = 4;
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pixel ++;
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case 8 :
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for (x = image->width, line_ptr = line;
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x > 0;
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x --, line_ptr += d, pixel ++) {
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line_ptr[0] = cvals[*pixel][0];
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line_ptr[1] = cvals[*pixel][1];
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line_ptr[2] = cvals[*pixel][2];
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}
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}
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break;
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break;
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case 8 :
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for (x = image->width, line_ptr = line;
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x > 0;
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x --, line_ptr += d, pixel ++) {
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line_ptr[0] = cvals[*pixel][0];
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line_ptr[1] = cvals[*pixel][1];
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line_ptr[2] = cvals[*pixel][2];
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}
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break;
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case 12 :
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for (x = image->width, line_ptr = line, index_shift = 0;
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x > 0;
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x --, line_ptr += d) {
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if (index_shift == 0) {
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i = ((pixel[0] << 4) | (pixel[1] >> 4)) & 4095;
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} else {
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i = ((pixel[1] << 8) | pixel[2]) & 4095;
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}
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case 12 :
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for (x = image->width, line_ptr = line, index_shift = 0;
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x > 0;
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x --, line_ptr += d) {
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if (index_shift == 0) {
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i = ((pixel[0] << 4) | (pixel[1] >> 4)) & 4095;
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} else {
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i = ((pixel[1] << 8) | pixel[2]) & 4095;
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line_ptr[0] = cvals[i][0];
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line_ptr[1] = cvals[i][1];
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line_ptr[2] = cvals[i][2];
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if (index_shift == 0) {
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index_shift = 4;
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} else {
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index_shift = 0;
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pixel += 3;
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}
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}
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break;
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}
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}
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} else {
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// RGB(A) image, so figure out the shifts & masks...
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red_mask = image->red_mask;
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red_shift = 0;
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line_ptr[0] = cvals[i][0];
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line_ptr[1] = cvals[i][1];
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line_ptr[2] = cvals[i][2];
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while ((red_mask & 1) == 0) {
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red_mask >>= 1;
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red_shift ++;
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}
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if (index_shift == 0) {
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index_shift = 4;
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} else {
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index_shift = 0;
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pixel += 3;
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green_mask = image->green_mask;
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green_shift = 0;
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while ((green_mask & 1) == 0) {
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green_mask >>= 1;
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green_shift ++;
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}
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blue_mask = image->blue_mask;
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blue_shift = 0;
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while ((blue_mask & 1) == 0) {
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blue_mask >>= 1;
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blue_shift ++;
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}
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// Read the pixels and output an RGB image...
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for (y = 0; y < image->height; y ++) {
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pixel = (unsigned char *)(image->data + y * image->bytes_per_line);
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line = p + y * w * d;
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switch (image->bits_per_pixel) {
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case 8 :
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for (x = image->width, line_ptr = line;
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x > 0;
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x --, line_ptr += d, pixel ++) {
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i = *pixel;
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line_ptr[0] = 255 * ((i >> red_shift) & red_mask) / red_mask;
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line_ptr[1] = 255 * ((i >> green_shift) & green_mask) / green_mask;
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line_ptr[2] = 255 * ((i >> blue_shift) & blue_mask) / blue_mask;
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}
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}
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break;
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break;
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case 12 :
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for (x = image->width, line_ptr = line, index_shift = 0;
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x > 0;
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x --, line_ptr += d) {
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if (index_shift == 0) {
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i = ((pixel[0] << 4) | (pixel[1] >> 4)) & 4095;
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} else {
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i = ((pixel[1] << 8) | pixel[2]) & 4095;
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}
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line_ptr[0] = 255 * ((i >> red_shift) & red_mask) / red_mask;
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line_ptr[1] = 255 * ((i >> green_shift) & green_mask) / green_mask;
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line_ptr[2] = 255 * ((i >> blue_shift) & blue_mask) / blue_mask;
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if (index_shift == 0) {
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index_shift = 4;
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} else {
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index_shift = 0;
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pixel += 3;
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}
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}
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break;
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case 16 :
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if (image->byte_order == LSBFirst) {
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// Little-endian...
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for (x = image->width, line_ptr = line;
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x > 0;
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x --, line_ptr += d, pixel += 2) {
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i = (pixel[1] << 8) | pixel[0];
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line_ptr[0] = 255 * ((i >> red_shift) & red_mask) / red_mask;
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line_ptr[1] = 255 * ((i >> green_shift) & green_mask) / green_mask;
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line_ptr[2] = 255 * ((i >> blue_shift) & blue_mask) / blue_mask;
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}
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} else {
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// Big-endian...
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for (x = image->width, line_ptr = line;
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x > 0;
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x --, line_ptr += d, pixel += 2) {
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i = (pixel[0] << 8) | pixel[1];
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line_ptr[0] = 255 * ((i >> red_shift) & red_mask) / red_mask;
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line_ptr[1] = 255 * ((i >> green_shift) & green_mask) / green_mask;
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line_ptr[2] = 255 * ((i >> blue_shift) & blue_mask) / blue_mask;
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}
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}
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break;
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case 24 :
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if (image->byte_order == LSBFirst) {
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// Little-endian...
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for (x = image->width, line_ptr = line;
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x > 0;
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x --, line_ptr += d, pixel += 3) {
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i = (((pixel[2] << 8) | pixel[1]) << 8) | pixel[0];
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line_ptr[0] = 255 * ((i >> red_shift) & red_mask) / red_mask;
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line_ptr[1] = 255 * ((i >> green_shift) & green_mask) / green_mask;
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line_ptr[2] = 255 * ((i >> blue_shift) & blue_mask) / blue_mask;
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}
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} else {
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// Big-endian...
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for (x = image->width, line_ptr = line;
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x > 0;
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x --, line_ptr += d, pixel += 3) {
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i = (((pixel[0] << 8) | pixel[1]) << 8) | pixel[2];
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line_ptr[0] = 255 * ((i >> red_shift) & red_mask) / red_mask;
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line_ptr[1] = 255 * ((i >> green_shift) & green_mask) / green_mask;
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line_ptr[2] = 255 * ((i >> blue_shift) & blue_mask) / blue_mask;
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}
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}
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break;
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case 32 :
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if (image->byte_order == LSBFirst) {
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// Little-endian...
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for (x = image->width, line_ptr = line;
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x > 0;
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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;
|
||||
}
|
||||
}
|
||||
}
|
||||
} 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);
|
||||
}
|
||||
|
||||
// Destroy the X image we've read and return the RGB(A) image...
|
||||
XDestroyImage(image);
|
||||
|
||||
Fl_RGB_Image *rgb = new Fl_RGB_Image(p, w, h, d);
|
||||
rgb->alloc_array = 1;
|
||||
return rgb;
|
||||
|
|
|
|||
|
|
@ -644,6 +644,16 @@ static void alpha_blend(Fl_RGB_Image *img, int X, int Y, int W, int H, int cx, i
|
|||
if (cy < 0) { H += cy; Y -= cy; cy = 0; }
|
||||
if (W + cx > img->data_w()) W = img->data_w() - cx;
|
||||
if (H + cy > img->data_h()) H = img->data_h() - cy;
|
||||
// don't attempt to read outside the window/offscreen buffer limits
|
||||
Window root_return;
|
||||
int x_return, y_return;
|
||||
unsigned int winW, winH;
|
||||
unsigned int border_width_return;
|
||||
unsigned int depth_return;
|
||||
XGetGeometry(fl_display, fl_window, &root_return, &x_return, &y_return, &winW,
|
||||
&winH, &border_width_return, &depth_return);
|
||||
if (X+W > winW) W = winW-X;
|
||||
if (Y+H > winH) H = winH-Y;
|
||||
if (W <= 0 || H <= 0) return;
|
||||
int ld = img->ld();
|
||||
if (ld == 0) ld = img->data_w() * img->d();
|
||||
|
|
|
|||
Loading…
Reference in New Issue