Attachment 4431 Details for Bug 5681 – a short example-program to reproduce the bug

a short example-program to reproduce the bug

pattern-example.c (text/plain), 2.47 KB, created by Mirco Müller on 2006-01-22 18:06:47 UTC

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Filename:

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Creator: Mirco Müller

Created: 2006-01-22 18:06:47 UTC

Size: 2.47 KB

patch

obsolete

>#include <gdk/gdkkeysyms.h>
>#include <gtk/gtk.h>
>#include <math.h>
>
>#define WIN_WIDTH 256
>#define WIN_HEIGHT 256
>
>cairo_t*	 g_pCairoContext;
>
>gboolean on_key_press (GtkWidget	*	pWidget,
>					   GdkEventKey*	pKey,
>					   gpointer		userData)
>{
>	if (pKey->type == GDK_KEY_PRESS)
>	{
>		switch (pKey->keyval)
>		{
>			case GDK_Escape :
>				gtk_main_quit ();
>			break;
>		}
>	}
>
>	return FALSE;
>}
>
>void render (int width, int height)
>{
>	cairo_pattern_t* pPattern;
>
>	cairo_scale (g_pCairoContext, (double) width / 1.0f, (double) height / 1.0f);
>	
>	pPattern = cairo_pattern_create_radial (0.55f,
>											0.55f,
>											0.25f,
>											0.5f,
>											1.0f,
>											0.525f);
>	cairo_pattern_add_color_stop_rgba (pPattern,
>									   0.0f,
>									   0.0f,
>									   0.0f,
>									   1.0f,
>									   0.811f);
>	cairo_pattern_add_color_stop_rgba (pPattern,
>									   0.64f,
>									   0.345f,
>									   0.345f,
>									   1.0f,
>									   0.317f);
>	cairo_pattern_add_color_stop_rgba (pPattern,
>									   0.84f,
>									   0.713f,
>									   0.713f,
>									   1.0f,
>									   0.137f);
>	cairo_pattern_add_color_stop_rgba (pPattern,	
>									   1.0f,
>									   1.0f,
>									   1.0f,
>									   1.0f,
>									   0.0f);
>	cairo_pattern_set_filter (pPattern, CAIRO_FILTER_BILINEAR);
>	cairo_set_source (g_pCairoContext, pPattern);
>	cairo_arc (g_pCairoContext, 0.5f, 0.5f, 142.0f/150.0f, 0.0f, M_PI * 2.0f);
>	cairo_fill (g_pCairoContext);
>	cairo_pattern_destroy (pPattern);
>}
>
>static gboolean on_window_expose (GtkWidget*	 pWidget,
>								  GdkEventExpose* pExpose)
>{
>	g_pCairoContext = gdk_cairo_create (pWidget->window);
>	render (WIN_WIDTH, WIN_HEIGHT);
>	cairo_destroy (g_pCairoContext);
>
>	return FALSE;
>}
>
>int main(int argc, char **argv)
>{
>	GtkWidget *window;
>
>	gtk_init (&argc, &argv);
>
>	window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
>	gtk_window_set_resizable (GTK_WINDOW(window), FALSE);
>	gtk_widget_set_size_request (window, WIN_WIDTH, WIN_HEIGHT);
>	gtk_window_set_title (GTK_WINDOW (window), "pattern example");
>	gtk_widget_set_app_paintable (window, TRUE);
>
>	g_signal_connect (G_OBJECT (window),
>					  "destroy",
>					  G_CALLBACK (gtk_main_quit),
>					  NULL);
>
>	g_signal_connect (G_OBJECT (window),
>					  "key-press-event",
>					  G_CALLBACK (on_key_press),
>					  NULL);
>
>	g_signal_connect (G_OBJECT (window),
>					  "expose-event",
>					  G_CALLBACK (on_window_expose),
>					  NULL);
>
>	gtk_widget_show (window);
>
>	g_pCairoContext = gdk_cairo_create (window->window);
>
>	gtk_main ();
>
>	return 0;
>}

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Attachments on bug 5681: 4430 | 4431 | 19495

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