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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <xcb/xcb.h>
#include "../aux/xcb_aux.h"
#include "../aux/xcb_bitops.h"
#include "xcb_image.h"
#define WIDTH 50
#define HEIGHT 50
static uint32_t
color (uint32_t depth, uint32_t x, uint32_t y)
{
uint32_t p;
if (depth == 1) {
extern long random();
int frac = random() % (WIDTH * HEIGHT);
p = x * y >= frac;
return p;
}
depth /= 3;
p = ((1 << depth) - 1) * x * y / WIDTH / HEIGHT;
return (p << depth) | (p << (2 * depth));
}
static xcb_image_t *create_image(xcb_connection_t *c, int depth, int format)
{
xcb_image_t *im;
int x, y;
printf("Image depth %d, format %d\n", depth, format);
im = xcb_image_create_native(c, WIDTH, HEIGHT,
format, depth, 0, 0, 0);
for(x = 0; x < WIDTH; ++x)
for(y = 0; y < HEIGHT; ++y)
xcb_image_put_pixel(im, x, y, color(depth, x, y));
return im;
}
static xcb_window_t create_window(xcb_connection_t *c, xcb_screen_t *root)
{
static const uint32_t mask = XCB_CW_EVENT_MASK;
static const uint32_t values[] = { XCB_EVENT_MASK_EXPOSURE };
unsigned int seq;
xcb_window_t w = xcb_generate_id(c);
seq = xcb_create_window(c, root->root_depth, w, root->root, 30, 30, WIDTH, HEIGHT, 0, XCB_WINDOW_CLASS_INPUT_OUTPUT, root->root_visual, mask, values).sequence;
printf("CreateWindow sequence %d, depth %d\n", seq, root->root_depth);
seq = xcb_map_window(c, w).sequence;
printf("MapWindow sequence %d\n", seq);
return w;
}
static xcb_pixmap_t create_pixmap(xcb_connection_t *c, xcb_drawable_t d, uint8_t depth)
{
xcb_pixmap_t p = xcb_generate_id(c);
unsigned int seq;
seq = xcb_create_pixmap(c, depth, p, d, WIDTH, HEIGHT).sequence;
printf("CreatePixmap sequence %d, depth %d\n", seq, depth);
return p;
}
static xcb_gcontext_t create_gcontext(xcb_connection_t *c,
xcb_drawable_t d,
xcb_screen_t *root)
{
static const uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
const uint32_t values[] = { root->black_pixel, 0xffff };
unsigned int seq;
xcb_gcontext_t gc = xcb_generate_id(c);
seq = xcb_create_gc(c, gc, d, mask, values).sequence;
printf("CreateGC sequence %d\n", seq);
return gc;
}
typedef struct {
char *name;
xcb_image_format_t format;
uint8_t depth;
} format_t;
static format_t formats[] = {
{"z-pixmap", XCB_IMAGE_FORMAT_Z_PIXMAP, 24},
{"xy-bitmap", XCB_IMAGE_FORMAT_XY_BITMAP, 1},
{"xy-pixmap-1", XCB_IMAGE_FORMAT_XY_PIXMAP, 1},
{"xy-pixmap-24", XCB_IMAGE_FORMAT_XY_PIXMAP, 24},
{0, 0, 0}
};
static format_t *
parse_format (char *name) {
format_t *f;
for (f = formats; f->name; f++)
if (!strcmp(name, f->name))
return f;
fprintf(stderr, "%s: bad format: known formats are:\n", name);
for (f = formats; f->name; f++)
fprintf(stderr, "\t%s\n", f->name);
exit(1);
}
int main(int argc, char **argv)
{
int screen, depth;
format_t *format = &formats[0];
xcb_screen_t *root;
xcb_visualtype_t *visual;
xcb_image_t *im;
xcb_drawable_t d, w = XCB_NONE;
xcb_gcontext_t dgc, wgc = 0;
xcb_generic_event_t *ev;
xcb_connection_t *c = xcb_connect(0, &screen);
if(!c)
{
printf("Connection failed.\n");
exit(1);
}
root = xcb_aux_get_screen(c, screen);
assert(root);
visual = xcb_aux_find_visual_by_id(root, root->root_visual);
assert(visual);
if(argc > 1)
format = parse_format(argv[1]);
if (root->root_depth != 24 ||
visual->_class != XCB_VISUAL_CLASS_TRUE_COLOR)
{
printf("Only 24 bit TrueColor visuals for now\n");
exit(1);
}
depth = format->depth;
im = create_image(c, depth, format->format);
d = create_window(c, root);
if(format->format == XCB_IMAGE_FORMAT_XY_PIXMAP && depth == 1)
{
w = d;
d = create_pixmap(c, w, depth);
}
dgc = create_gcontext(c, d, root);
if (w)
wgc = create_gcontext(c, w, root);
xcb_flush(c);
if(im)
{
while((ev = xcb_wait_for_event(c)))
{
if(ev->response_type == XCB_EXPOSE && ((xcb_expose_event_t *) ev)->count == 0)
{
printf("ImagePut sequence %d\n", xcb_image_put(c, d, dgc, im, 0, 0, 0).sequence);
if(w)
{
unsigned int seq;
seq = xcb_copy_plane(c, d, w, wgc,
0, 0, 0, 0,
WIDTH, HEIGHT, 1).sequence;
printf("CopyPlane sequence %d\n", seq);
}
xcb_flush(c);
}
else if(ev->response_type == 0)
{
xcb_generic_error_t *err = (xcb_generic_error_t *) ev;
printf("Error: %d after sequence %d\n", err->error_code, (unsigned int) err->full_sequence);
}
free(ev);
}
xcb_image_destroy(im);
}
xcb_disconnect(c);
exit(0);
}
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