Attachment 35382 Details for Bug 27922 – Demo program which rapidly resizes an opengl window.

Demo program which rapidly resizes an opengl window.

glresize.c (text/plain), 2.52 KB, created by Nick Bowler on 2010-05-02 18:36:37 UTC

(hide)

Description:

Filename:

MIME Type:

Creator: Nick Bowler

Created: 2010-05-02 18:36:37 UTC

Size: 2.52 KB

patch

obsolete

>/*
> * Copyright (C) 2010 Nick Bowler
> *
> * License WTFPL2: Do What The Fuck You Want To Public License, version 2.
> * This is free software: you are free to do what the fuck you want to.
> * There is NO WARRANTY, to the extent permitted by law.
> *
> * In case the above is not acceptable, you may alternately choose the terms
> * of the MIT license: http://opensource.org/licenses/mit-license.php.
> */
>#include <stdio.h>
>#include <string.h>
>
>#include <gdk/gdk.h>
>#include <gdk/gdkgl.h>
>#include <GL/gl.h>
>
>void resize(GdkGLDrawable *drawable)
>{
>	gint w, h;
>
>	gdk_gl_drawable_get_size(drawable, &w, &h);
>
>	glMatrixMode(GL_PROJECTION);
>	glLoadIdentity();
>	glViewport(0, 0, w, h);
>	glOrtho(0, 1, 0, 1, -1, 1);
>	glMatrixMode(GL_MODELVIEW);
>}
>
>void render(void)
>{
>	glClear(GL_COLOR_BUFFER_BIT);
>
>	glBegin(GL_LINE_LOOP);
>	glVertex2d(0.1, 0.1);
>	glVertex2d(0.9, 0.1);
>	glVertex2d(0.9, 0.9);
>	glVertex2d(0.1, 0.9);
>	glEnd();
>}
>
>int main(int argc, char **argv)
>{
>	GdkWindow  *root, *win;
>	GdkGLWindow *glwin;
>	GdkGLConfig *config;
>	GdkGLDrawable *drawable;
>	GdkGLContext *context;
>	gint screen_w, screen_h;
>	int i, state = 0, mode = GDK_GL_MODE_RGB | GDK_GL_MODE_DOUBLE;
>
>	GdkWindowAttr attrs = {
>		.window_type = GDK_WINDOW_TOPLEVEL,
>		.wclass = GDK_INPUT_OUTPUT,
>		.x = 0, .y = 0,
>		.width  = 300,
>		.height = 300,
>		.override_redirect = 1,
>	};
>
>	gdk_init(&argc, &argv);
>	gdk_gl_init(&argc, &argv);
>
>	for (i = 1; i < argc; i++) {
>		if (strcmp(argv[i], "--single") == 0) {
>			mode &= ~GDK_GL_MODE_DOUBLE;
>		} else if (strcmp(argv[i], "--offset") == 0) {
>			attrs.x = attrs.y = 1;
>		}
>	}
>
>	root = gdk_get_default_root_window();
>	gdk_window_get_geometry(root, NULL, NULL, &screen_w, &screen_h, NULL);
>	printf("screen size: %dx%d\n", screen_w, screen_h);
>
>	config = gdk_gl_config_new_by_mode(mode);
>	win = gdk_window_new(NULL, &attrs, GDK_WA_X|GDK_WA_Y|GDK_WA_NOREDIR);
>	glwin = gdk_window_set_gl_capability(win, config, NULL);
>	drawable = gdk_window_get_gl_drawable(win);
>	context  = gdk_gl_context_new(drawable, NULL, 1, GDK_GL_RGBA_TYPE);
>
>	if (gdk_gl_drawable_is_double_buffered(drawable))
>		puts("using double buffering");
>	else
>		puts("using single buffering");
>
>	gdk_window_show(win);
>
>	while (1) {
>		gdk_gl_drawable_make_current(drawable, context);
>		resize(drawable);
>		render();
>		if (gdk_gl_drawable_is_double_buffered(drawable))
>			gdk_gl_drawable_swap_buffers(drawable);
>		else
>			glFinish();
>		gdk_gl_drawable_gl_end(drawable);
>
>		if (state = !state)
>			gdk_window_resize(win, screen_w, screen_h);
>		else
>			gdk_window_resize(win, attrs.width, attrs.height);
>	}
>
>	return 0;
>}

Actions: View

Attachments on bug 27922: 35380 | 35381 | 35382 | 35554 | 35555 | 35567 | 35569

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.