/* * Copyright © 2008 Bart Massey * * Permission is hereby granted, free of charge, to any person * obtaining a copy of this software and associated documentation * files (the "Software"), to deal in the Software without * restriction, including without limitation the rights to use, copy, * modify, merge, publish, distribute, sublicense, and/or sell copies * of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * * Except as contained in this notice, the names of the authors or * their institutions shall not be used in advertising or otherwise to * promote the sale, use or other dealings in this Software without * prior written authorization from the authors. */ /* gcc -g -O2 -Wall `pkg-config --cflags --libs xcb` -o test xcb_image.o test_xcb_image.c */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #include #include "xcb_image.h" #define W_W 128 #define W_H 128 static void reflect_window (xcb_connection_t *c, xcb_drawable_t win, xcb_drawable_t new_win, xcb_gcontext_t gc, uint16_t width, uint16_t height) { xcb_image_t *image; uint32_t pixel1; uint32_t pixel2; int32_t left_x; int32_t right_x; int32_t y; int format; format = XCB_IMAGE_FORMAT_XY_PIXMAP; printf ("get_image %d %d\n", width, height); image = xcb_image_get (c, win, 0, 0, width, height, 0xaaaaaaaa, format); if (!image) { printf("xcb_image_get failed: exiting\n"); exit(1); } printf ("Create image summary:\n"); printf (" * format................: %d\n", image->format); printf (" * byte order............: %d\n", image->byte_order); printf (" * bitmap order..........: %d\n", image->bit_order); printf (" * bitmap pad............: %d\n", image->scanline_pad); printf (" * depth.................: %d\n", image->depth); printf (" * bytes/line............: %d\n", image->stride); printf (" * bits/pixel (or unit)..: %d\n", image->bpp); printf (" * plane_mask............: %#x\n", image->plane_mask); printf ("bpl %d %d\n", image->stride, image->height); printf("calculating reflection -- this may take awhile...\n"); for (left_x = 0 ; left_x < width/2 ; left_x++) { for (y = 0 ; y < height ; y++) { pixel1 = xcb_image_get_pixel (image, left_x, y); right_x = width - left_x-1; if (left_x != right_x) { pixel2 = xcb_image_get_pixel (image, right_x, y); xcb_image_put_pixel (image, left_x, y, pixel2); } xcb_image_put_pixel (image, right_x, y, pixel1); } } printf("putting image\n"); xcb_image_put (c, new_win, gc, image, 0, 0, 0); image = xcb_image_get (c, new_win, 0, 0, width, height, ~0, format); printf ("done\n"); } int main (int argc, char *argv[]) { xcb_connection_t *c; xcb_screen_t *screen; xcb_drawable_t win; xcb_drawable_t new_win; xcb_drawable_t rect; xcb_rectangle_t rect_coord = { 0, 0, W_W, W_H}; xcb_gcontext_t bgcolor, fgcolor; xcb_point_t points[2]; uint32_t mask; uint32_t valgc[2]; uint32_t valwin[3]; int depth; int screen_nbr; xcb_generic_event_t *e; /* Open the connexion to the X server and get the first screen */ c = xcb_connect (NULL, &screen_nbr); screen = xcb_aux_get_screen (c, screen_nbr); depth = xcb_aux_get_depth (c, screen); /* Create a black graphic context for drawing in the foreground */ win = screen->root; fgcolor = xcb_generate_id(c); mask = XCB_GC_FOREGROUND | XCB_GC_GRAPHICS_EXPOSURES; valgc[0] = screen->black_pixel; valgc[1] = 0; /* no graphics exposures */ xcb_create_gc(c, fgcolor, win, mask, valgc); bgcolor = xcb_generate_id(c); mask = XCB_GC_FOREGROUND | XCB_GC_GRAPHICS_EXPOSURES; valgc[0] = screen->white_pixel; valgc[1] = 0; /* no graphics exposures */ xcb_create_gc(c, bgcolor, win, mask, valgc); /* Ask for our window's Id */ win = xcb_generate_id(c); /* Create the window */ mask = XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK | XCB_CW_DONT_PROPAGATE; valwin[0] = screen->white_pixel; valwin[1] = XCB_EVENT_MASK_KEY_PRESS | XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_EXPOSURE; valwin[2] = XCB_EVENT_MASK_BUTTON_PRESS; xcb_create_window (c, /* Connection */ 0, /* depth */ win, /* window Id */ screen->root, /* parent window */ 0, 0, /* x, y */ W_W, W_H, /* width, height */ 10, /* border_width */ XCB_WINDOW_CLASS_INPUT_OUTPUT,/* class */ screen->root_visual, /* visual */ mask, valwin); /* masks, not used yet */ /* From the tutorial: set the window title. */ xcb_change_property (c, XCB_PROP_MODE_REPLACE, win, XCB_ATOM_WM_NAME, XCB_ATOM_STRING, 8, strlen ("drew"), "drew"); /* Map the window on the screen */ xcb_map_window (c, win); /* Create a Pixmap that will fill the window */ rect = xcb_generate_id (c); xcb_create_pixmap(c, depth, rect, win, W_W, W_H); xcb_poly_fill_rectangle(c, rect, bgcolor, 1, &rect_coord); points[0].x = 0; points[0].y = 0; points[1].x = W_W; points[1].y = W_H; xcb_poly_line(c, XCB_COORD_MODE_ORIGIN, rect, fgcolor, 2, points); points[0].x = W_W / 4; points[0].y = 0; points[1].x = W_W / 2; points[1].y = W_H / 2; xcb_poly_line(c, XCB_COORD_MODE_ORIGIN, rect, fgcolor, 2, points); /* Ask for our window's Id */ new_win = xcb_generate_id(c); /* Create the window */ mask = XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK | XCB_CW_DONT_PROPAGATE; valwin[0] = screen->white_pixel; valwin[1] = XCB_EVENT_MASK_KEY_PRESS | XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_EXPOSURE; valwin[2] = XCB_EVENT_MASK_BUTTON_PRESS; xcb_create_window (c, /* Connection */ 0, /* depth */ new_win, /* window Id */ screen->root, /* parent window */ 0, 0, /* x, y */ W_W, W_H, /* width, height */ 10, /* border_width */ XCB_WINDOW_CLASS_INPUT_OUTPUT,/* class */ screen->root_visual, /* visual */ mask, valwin); /* masks, not used yet */ /* From the tutorial: set the window title. */ xcb_change_property (c, XCB_PROP_MODE_REPLACE, new_win, XCB_ATOM_WM_NAME, XCB_ATOM_STRING, 8, strlen ("got"), "got"); /* Map the window on the screen */ xcb_map_window (c, new_win); xcb_flush (c); while ((e = xcb_wait_for_event(c))) { switch (e->response_type) { case XCB_EXPOSE: { xcb_copy_area(c, rect, win, bgcolor, 0, 0, 0, 0, W_W, W_H); reflect_window (c, win, new_win, fgcolor, W_W, W_H); xcb_flush (c); break; } } free (e); } return 1; }