diff options
Diffstat (limited to 'src/pixman/demos/gtk-utils.c')
| -rw-r--r-- | src/pixman/demos/gtk-utils.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/src/pixman/demos/gtk-utils.c b/src/pixman/demos/gtk-utils.c new file mode 100644 index 0000000..32d4aec --- /dev/null +++ b/src/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 (); +} |
