Add qemu 2.4.0

[kvmfornfv.git] / qemu / pixman / demos / gtk-utils.c

diff --git a/qemu/pixman/demos/gtk-utils.c b/qemu/pixman/demos/gtk-utils.c
new file mode 100644 (file)
index 0000000..32d4aec
--- /dev/null
+++ b/qemu/pixman/demos/gtk-utils.c
@@ -0,0 +1,179 @@
+#include <gtk/gtk.h>
+#include <config.h>
+#include "../test/utils.h"
+#include "gtk-utils.h"
+
+pixman_image_t *
+pixman_image_from_file (const char *filename, pixman_format_code_t format)
+{
+    GdkPixbuf *pixbuf;
+    pixman_image_t *image;
+    int width, height;
+    uint32_t *data, *d;
+    uint8_t *gdk_data;
+    int n_channels;
+    int j, i;
+    int stride;
+
+    if (!(pixbuf = gdk_pixbuf_new_from_file (filename, NULL)))
+       return NULL;
+
+    image = NULL;
+
+    width = gdk_pixbuf_get_width (pixbuf);
+    height = gdk_pixbuf_get_height (pixbuf);
+    n_channels = gdk_pixbuf_get_n_channels (pixbuf);
+    gdk_data = gdk_pixbuf_get_pixels (pixbuf);
+    stride = gdk_pixbuf_get_rowstride (pixbuf);
+
+    if (!(data = malloc (width * height * sizeof (uint32_t))))
+       goto out;
+
+    d = data;
+    for (j = 0; j < height; ++j)
+    {
+       uint8_t *gdk_line = gdk_data;
+
+       for (i = 0; i < width; ++i)
+       {
+           int r, g, b, a;
+           uint32_t pixel;
+
+           r = gdk_line[0];
+           g = gdk_line[1];
+           b = gdk_line[2];
+
+           if (n_channels == 4)
+               a = gdk_line[3];
+           else
+               a = 0xff;
+
+           r = (r * a + 127) / 255;
+           g = (g * a + 127) / 255;
+           b = (b * a + 127) / 255;
+
+           pixel = (a << 24) | (r << 16) | (g << 8) | b;
+
+           *d++ = pixel;
+           gdk_line += n_channels;
+       }
+
+       gdk_data += stride;
+    }
+
+    image = pixman_image_create_bits (
+       format, width, height, data, width * 4);
+
+out:
+    g_object_unref (pixbuf);
+    return image;
+}
+
+GdkPixbuf *
+pixbuf_from_argb32 (uint32_t *bits,
+                   int width,
+                   int height,
+                   int stride)
+{
+    GdkPixbuf *pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE,
+                                       8, width, height);
+    int p_stride = gdk_pixbuf_get_rowstride (pixbuf);
+    guint32 *p_bits = (guint32 *)gdk_pixbuf_get_pixels (pixbuf);
+    int i;
+
+    for (i = 0; i < height; ++i)
+    {
+       uint32_t *src_row = &bits[i * (stride / 4)];
+       uint32_t *dst_row = p_bits + i * (p_stride / 4);
+
+       a8r8g8b8_to_rgba_np (dst_row, src_row, width);
+    }
+
+    return pixbuf;
+}
+
+static gboolean
+on_expose (GtkWidget *widget, GdkEventExpose *expose, gpointer data)
+{
+    pixman_image_t *pimage = data;
+    int width = pixman_image_get_width (pimage);
+    int height = pixman_image_get_height (pimage);
+    int stride = pixman_image_get_stride (pimage);
+    cairo_surface_t *cimage;
+    cairo_format_t format;
+    cairo_t *cr;
+
+    if (pixman_image_get_format (pimage) == PIXMAN_x8r8g8b8)
+       format = CAIRO_FORMAT_RGB24;
+    else
+       format = CAIRO_FORMAT_ARGB32;
+
+    cimage = cairo_image_surface_create_for_data (
+       (uint8_t *)pixman_image_get_data (pimage),
+       format, width, height, stride);
+    
+    cr = gdk_cairo_create (widget->window);
+
+    cairo_rectangle (cr, 0, 0, width, height);
+    cairo_set_source_surface (cr, cimage, 0, 0);
+    cairo_fill (cr);
+
+    cairo_destroy (cr);
+    cairo_surface_destroy (cimage);
+    
+    return TRUE;
+}
+
+void
+show_image (pixman_image_t *image)
+{
+    GtkWidget *window;
+    int width, height;
+    int argc;
+    char **argv;
+    char *arg0 = g_strdup ("pixman-test-program");
+    pixman_format_code_t format;
+    pixman_image_t *copy;
+
+    argc = 1;
+    argv = (char **)&arg0;
+
+    gtk_init (&argc, &argv);
+    
+    window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+    width = pixman_image_get_width (image);
+    height = pixman_image_get_height (image);
+
+    gtk_window_set_default_size (GTK_WINDOW (window), width, height);
+
+    format = pixman_image_get_format (image);
+
+    /* We always display the image as if it contains sRGB data. That
+     * means that no conversion should take place when the image
+     * has the a8r8g8b8_sRGB format.
+     */
+    switch (format)
+    {
+    case PIXMAN_a8r8g8b8_sRGB:
+    case PIXMAN_a8r8g8b8:
+    case PIXMAN_x8r8g8b8:
+       copy = pixman_image_ref (image);
+       break;
+
+    default:
+       copy = pixman_image_create_bits (PIXMAN_a8r8g8b8,
+                                        width, height, NULL, -1);
+       pixman_image_composite32 (PIXMAN_OP_SRC,
+                                 image, NULL, copy,
+                                 0, 0, 0, 0, 0, 0,
+                                 width, height);
+       break;
+    }
+
+    g_signal_connect (window, "expose_event", G_CALLBACK (on_expose), copy);
+    g_signal_connect (window, "delete_event", G_CALLBACK (gtk_main_quit), NULL);
+    
+    gtk_widget_show (window);
+    
+    gtk_main ();
+}