From a6163888f3c56123b1db313743c6147ba498732c Mon Sep 17 00:00:00 2001 From: Yuval Adam Date: Fri, 8 Aug 2014 14:42:07 +0300 Subject: Add third_party libs --- .../windows/fltk-1.1.10/src/fl_read_image.cxx | 503 +++++++++++++++++++++ 1 file changed, 503 insertions(+) create mode 100644 third_party/windows/fltk-1.1.10/src/fl_read_image.cxx (limited to 'third_party/windows/fltk-1.1.10/src/fl_read_image.cxx') diff --git a/third_party/windows/fltk-1.1.10/src/fl_read_image.cxx b/third_party/windows/fltk-1.1.10/src/fl_read_image.cxx new file mode 100644 index 0000000..44e5545 --- /dev/null +++ b/third_party/windows/fltk-1.1.10/src/fl_read_image.cxx @@ -0,0 +1,503 @@ +// +// "$Id: fl_read_image.cxx 6475 2008-10-19 20:35:32Z matt $" +// +// X11 image reading routines for the Fast Light Tool Kit (FLTK). +// +// Copyright 1998-2005 by Bill Spitzak and others. +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Library General Public +// License as published by the Free Software Foundation; either +// version 2 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Library General Public License for more details. +// +// You should have received a copy of the GNU Library General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 +// USA. +// +// Please report all bugs and problems on the following page: +// +// http://www.fltk.org/str.php +// + +#include +#include +#include +#include "flstring.h" + +#ifdef DEBUG +# include +#endif // DEBUG + +#ifdef WIN32 +# include "fl_read_image_win32.cxx" +#elif defined(__APPLE__) +# include "fl_read_image_mac.cxx" +#else +# include +# ifdef __sgi +# include +# else +# include +# endif // __sgi + +// Defined in fl_color.cxx +extern uchar fl_redmask, fl_greenmask, fl_bluemask; +extern int fl_redshift, fl_greenshift, fl_blueshift, fl_extrashift; + +// +// '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 +static int xgetimageerrhandler(Display *display, XErrorEvent *error) { + return 0; +} + +// +// 'fl_read_image()' - Read an image from the current window. +// + +uchar * // O - Pixel buffer or NULL if failed +fl_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) + 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... + // + +# 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 = 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 <= sw && dy + h <= 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 + 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; +} + +#endif + +// +// End of "$Id: fl_read_image.cxx 6475 2008-10-19 20:35:32Z matt $". +// -- cgit v1.3.1