static void
init_graphics2d_as_pixbuf (struct graphics2d *gr)
{
gint width, height;
gint bits_per_sample = 8;
gint total_channels = 4;
gboolean has_alpha = TRUE;
g_assert (gr != NULL);
g_assert (gr->drawable != NULL);
if (gr->debug) printf ("initializing graphics2d as pixbuf\n");
gdk_drawable_get_size (gr->drawable, &width, &height);
gr->drawbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
has_alpha, bits_per_sample,
width, height);
g_assert (gr->drawbuf != NULL);
g_assert (gdk_pixbuf_get_bits_per_sample (gr->drawbuf) == bits_per_sample);
g_assert (gdk_pixbuf_get_n_channels (gr->drawbuf) == total_channels);
gr->surface = cairo_surface_create_for_image (gdk_pixbuf_get_pixels (gr->drawbuf),
CAIRO_FORMAT_ARGB32,
gdk_pixbuf_get_width (gr->drawbuf),
gdk_pixbuf_get_height (gr->drawbuf),
gdk_pixbuf_get_rowstride (gr->drawbuf));
g_assert (gr->surface != NULL);
g_assert (gr->cr != NULL);
cairo_set_target_surface (gr->cr, gr->surface);
}
JNIEXPORT void JNICALL Java_gnu_java_awt_peer_gtk_GdkGraphics2D_drawPixels
(JNIEnv *env, jobject obj, jintArray java_pixels,
jint w, jint h, jint stride, jdoubleArray java_matrix)
{
struct graphics2d *gr = NULL;
jint *native_pixels = NULL;
jdouble *native_matrix = NULL;
gr = (struct graphics2d *) NSA_GET_G2D_PTR (env, obj);
g_assert (gr != NULL);
if (gr->debug) printf ("drawPixels (%d pixels, %dx%d, stride: %d)\n",
(*env)->GetArrayLength (env, java_pixels), w, h, stride);
native_pixels = (*env)->GetIntArrayElements (env, java_pixels, NULL);
native_matrix = (*env)->GetDoubleArrayElements (env, java_matrix, NULL);
g_assert (native_pixels != NULL);
g_assert (native_matrix != NULL);
g_assert ((*env)->GetArrayLength (env, java_matrix) == 6);
begin_drawing_operation (gr);
{
cairo_matrix_t *mat = NULL;
cairo_surface_t *surf = cairo_surface_create_for_image ((char *)native_pixels,
CAIRO_FORMAT_ARGB32,
w, h, stride * 4);
mat = cairo_matrix_create ();
cairo_matrix_set_affine (mat,
native_matrix[0], native_matrix[1],
native_matrix[2], native_matrix[3],
native_matrix[4], native_matrix[5]);
cairo_surface_set_matrix (surf, mat);
if (native_matrix[0] != 1.
|| native_matrix[1] != 0.
|| native_matrix[2] != 0.
|| native_matrix[3] != 1.)
{
cairo_surface_set_filter (surf, CAIRO_FILTER_BILINEAR);
cairo_surface_set_filter (gr->surface, CAIRO_FILTER_BILINEAR);
}
else
{
cairo_surface_set_filter (surf, CAIRO_FILTER_FAST);
cairo_surface_set_filter (gr->surface, CAIRO_FILTER_FAST);
}
cairo_show_surface (gr->cr, surf, w, h);
cairo_surface_set_filter (gr->surface, CAIRO_FILTER_FAST);
cairo_matrix_destroy (mat);
cairo_surface_destroy (surf);
}
end_drawing_operation (gr);
(*env)->ReleaseIntArrayElements (env, java_pixels, native_pixels, 0);
(*env)->ReleaseDoubleArrayElements (env, java_matrix, native_matrix, 0);
}
JNIEXPORT void JNICALL Java_gnu_java_awt_peer_gtk_GdkGraphics2D_setTexturePixels
(JNIEnv *env, jobject obj, jintArray jarr, jint w, jint h, jint stride)
{
struct graphics2d *gr = NULL;
jint *jpixels = NULL;
gdk_threads_enter();
if (peer_is_disposed(env, obj)) { gdk_threads_leave(); return; }
gr = (struct graphics2d *) NSA_GET_G2D_PTR (env, obj);
g_assert (gr != NULL);
if (gr->debug) printf ("setTexturePixels (%d pixels, %dx%d, stride: %d)\n",
(*env)->GetArrayLength (env, jarr), w, h, stride);
if (gr->pattern)
cairo_pattern_destroy (gr->pattern);
if (gr->pattern_surface)
cairo_surface_destroy (gr->pattern_surface);
if (gr->pattern_pixels)
free (gr->pattern_pixels);
gr->pattern = NULL;
gr->pattern_surface = NULL;
gr->pattern_pixels = NULL;
gr->pattern_pixels = (char *) malloc (h * stride * 4);
g_assert (gr->pattern_pixels != NULL);
jpixels = (*env)->GetIntArrayElements (env, jarr, NULL);
g_assert (jpixels != NULL);
memcpy (gr->pattern_pixels, jpixels, h * stride * 4);
(*env)->ReleaseIntArrayElements (env, jarr, jpixels, 0);
gr->pattern_surface = cairo_surface_create_for_image (gr->pattern_pixels,
CAIRO_FORMAT_ARGB32,
w, h, stride * 4);
g_assert (gr->pattern_surface != NULL);
cairo_surface_set_repeat (gr->pattern_surface, 1);
gr->pattern = cairo_pattern_create_for_surface (gr->pattern_surface);
g_assert (gr->pattern != NULL);
cairo_set_pattern (gr->cr, gr->pattern);
gdk_threads_leave();
}
