forked from old/legacy-imlib2
286 lines
12 KiB
C
286 lines
12 KiB
C
#include "config.h"
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/* include X11 stuff */
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#include <X11/Xlib.h>
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/* include Imlib2 stuff */
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#include <Imlib2.h>
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/* needed for sprintf and fprintf */
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#include <stdio.h>
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/* needed for getenv */
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#include <stdlib.h>
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/* some globals for our window & X display */
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Display *disp;
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Window win;
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Visual *vis;
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Colormap cm;
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int depth;
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/* the program... */
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int
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main(int argc, char **argv)
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{
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/* events we get from X */
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XEvent ev;
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/* areas to update */
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Imlib_Updates updates, current_update;
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/* our virtual framebuffer image we draw into */
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Imlib_Image buffer;
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/* a font */
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Imlib_Font font;
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/* our color range */
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Imlib_Color_Range range;
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/* our mouse x, y coordinates */
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int mouse_x = 0, mouse_y = 0;
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const char *display_name = getenv("DISPLAY");
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/* connect to X */
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if (!display_name)
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display_name = ":0";
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disp = XOpenDisplay(display_name);
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if (!disp)
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{
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fprintf(stderr, "Can't open display %s\n", display_name);
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return 1;
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}
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/* get default visual , colormap etc. you could ask imlib2 for what it */
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/* thinks is the best, but this example is intended to be simple */
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vis = DefaultVisual(disp, DefaultScreen(disp));
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depth = DefaultDepth(disp, DefaultScreen(disp));
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cm = DefaultColormap(disp, DefaultScreen(disp));
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/* create a window 640x480 */
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win = XCreateSimpleWindow(disp, DefaultRootWindow(disp),
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0, 0, 640, 480, 0, 0, 0);
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/* tell X what events we are interested in */
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XSelectInput(disp, win, ButtonPressMask | ButtonReleaseMask |
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PointerMotionMask | ExposureMask);
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/* show the window */
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XMapWindow(disp, win);
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/* set our cache to 2 Mb so it doesn't have to go hit the disk as long as */
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/* the images we use use less than 2Mb of RAM (that is uncompressed) */
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imlib_set_cache_size(2048 * 1024);
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/* set the font cache to 512Kb - again to avoid re-loading */
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imlib_set_font_cache_size(512 * 1024);
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/* add the ./ttfonts dir to our font path - you'll want a notepad.ttf */
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/* in that dir for the text to display */
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imlib_add_path_to_font_path(PACKAGE_DATA_DIR"/data/fonts");
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/* set the maximum number of colors to allocate for 8bpp and less to 128 */
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imlib_set_color_usage(128);
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/* dither for depths < 24bpp */
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imlib_context_set_dither(1);
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/* set the display , visual, colormap and drawable we are using */
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imlib_context_set_display(disp);
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imlib_context_set_visual(vis);
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imlib_context_set_colormap(cm);
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imlib_context_set_drawable(win);
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/* infinite event loop */
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for (;;)
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{
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/* image variable */
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Imlib_Image image;
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/* width and height values */
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int w, h, text_w, text_h;
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/* init our updates to empty */
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updates = imlib_updates_init();
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/* while there are events form X - handle them */
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do
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{
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XNextEvent(disp, &ev);
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switch (ev.type)
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{
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case Expose:
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/* window rectangle was exposed - add it to the list of */
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/* rectangles we need to re-render */
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updates = imlib_update_append_rect(updates,
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ev.xexpose.x,
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ev.xexpose.y,
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ev.xexpose.width,
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ev.xexpose.height);
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break;
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case ButtonPress:
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/* if we click anywhere in the window, exit */
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exit(0);
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break;
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case MotionNotify:
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/* if the mouse moves - note it */
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/* add a rectangle update for the new mouse position */
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image = imlib_load_image(PACKAGE_DATA_DIR"/data/images/mush.png");
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imlib_context_set_image(image);
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w = imlib_image_get_width();
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h = imlib_image_get_height();
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imlib_context_set_image(image);
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imlib_free_image();
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/* the old position - so we wipe over where it used to be */
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updates = imlib_update_append_rect(updates,
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mouse_x - (w / 2),
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mouse_y - (h / 2), w, h);
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font = imlib_load_font("notepad/30");
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if (font)
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{
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char text[4096];
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imlib_context_set_font(font);
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sprintf(text, "Mouse is at %i, %i", mouse_x, mouse_y);
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imlib_get_text_size(text, &text_w, &text_h);
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imlib_free_font();
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updates = imlib_update_append_rect(updates,
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320 - (text_w / 2),
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240 - (text_h / 2),
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text_w, text_h);
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}
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mouse_x = ev.xmotion.x;
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mouse_y = ev.xmotion.y;
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/* the new one */
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updates = imlib_update_append_rect(updates,
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mouse_x - (w / 2),
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mouse_y - (h / 2), w, h);
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font = imlib_load_font("notepad/30");
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if (font)
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{
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char text[4096];
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imlib_context_set_font(font);
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sprintf(text, "Mouse is at %i, %i", mouse_x, mouse_y);
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imlib_get_text_size(text, &text_w, &text_h);
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imlib_free_font();
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updates = imlib_update_append_rect(updates,
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320 - (text_w / 2),
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240 - (text_h / 2),
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text_w, text_h);
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}
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default:
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/* any other events - do nothing */
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break;
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}
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}
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while (XPending(disp));
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/* no more events for now ? ok - idle time so lets draw stuff */
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/* take all the little rectangles to redraw and merge them into */
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/* something sane for rendering */
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updates = imlib_updates_merge_for_rendering(updates, 640, 480);
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for (current_update = updates;
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current_update;
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current_update = imlib_updates_get_next(current_update))
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{
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int up_x, up_y, up_w, up_h;
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/* find out where the first update is */
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imlib_updates_get_coordinates(current_update,
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&up_x, &up_y, &up_w, &up_h);
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/* create our buffer image for renderign this update */
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buffer = imlib_create_image(up_w, up_h);
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/* we can blend stuff now */
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imlib_context_set_blend(1);
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/* fill the window background */
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/* load the background image - you'll need to have some images */
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/* in ./test_images lying around for this to actually work */
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image = imlib_load_image(PACKAGE_DATA_DIR"/data/images/bg.png");
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/* we're working with this image now */
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imlib_context_set_image(image);
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/* get its size */
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w = imlib_image_get_width();
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h = imlib_image_get_height();
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/* now we want to work with the buffer */
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imlib_context_set_image(buffer);
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/* if the iimage loaded */
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if (image)
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{
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/* blend image onto the buffer and scale it to 640x480 */
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imlib_blend_image_onto_image(image, 0,
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0, 0, w, h,
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-up_x, -up_y, 640, 480);
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/* working with the loaded image */
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imlib_context_set_image(image);
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/* free it */
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imlib_free_image();
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}
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/* draw an icon centered around the mouse position */
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image = imlib_load_image(PACKAGE_DATA_DIR"/data/images/mush.png");
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imlib_context_set_image(image);
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w = imlib_image_get_width();
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h = imlib_image_get_height();
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imlib_context_set_image(buffer);
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if (image)
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{
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imlib_blend_image_onto_image(image, 0,
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0, 0, w, h,
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mouse_x - (w / 2) - up_x,
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mouse_y - (h / 2) - up_y, w, h);
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imlib_context_set_image(image);
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imlib_free_image();
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}
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/* draw a gradient on top of things at the top left of the window */
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/* create a range */
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range = imlib_create_color_range();
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imlib_context_set_color_range(range);
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/* add white opaque as the first color */
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imlib_context_set_color(255, 255, 255, 255);
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imlib_add_color_to_color_range(0);
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/* add an orange color, semi-transparent 10 units from the first */
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imlib_context_set_color(255, 200, 10, 100);
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imlib_add_color_to_color_range(10);
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/* add black, fully transparent at the end 20 units away */
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imlib_context_set_color(0, 0, 0, 0);
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imlib_add_color_to_color_range(20);
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/* draw the range */
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imlib_context_set_image(buffer);
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imlib_image_fill_color_range_rectangle(-up_x, -up_y, 128, 128,
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-45.0);
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/* free it */
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imlib_free_color_range();
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/* draw text - centered with the current mouse x, y */
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font = imlib_load_font("notepad/30");
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if (font)
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{
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char text[4096];
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/* set the current font */
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imlib_context_set_font(font);
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/* set the image */
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imlib_context_set_image(buffer);
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/* set the color (black) */
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imlib_context_set_color(0, 0, 0, 255);
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/* print text to display in the buffer */
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sprintf(text, "Mouse is at %i, %i", mouse_x, mouse_y);
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/* query the size it will be */
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imlib_get_text_size(text, &text_w, &text_h);
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/* draw it */
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imlib_text_draw(320 - (text_w / 2) - up_x,
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240 - (text_h / 2) - up_y, text);
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/* free the font */
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imlib_free_font();
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}
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/* dont blend the image onto the drawable - slower */
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imlib_context_set_blend(0);
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/* set the buffer image as our current image */
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imlib_context_set_image(buffer);
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/* render the image at 0, 0 */
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imlib_render_image_on_drawable(up_x, up_y);
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/* don't need that temproary buffer image anymore */
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imlib_free_image();
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}
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/* if we had updates - free them */
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if (updates)
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imlib_updates_free(updates);
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/* loop again waiting for events */
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}
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return 0;
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}
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