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);
}
/* Draw the word cairo at NUM_TEXT different angles */
static void
draw (cairo_t *cr, int width, int height)
{
cairo_surface_t *target, *stamp;
target = cairo_current_target_surface (cr);
cairo_surface_reference (target);
stamp = cairo_surface_create_similar (target, CAIRO_FORMAT_ARGB32,
WIDTH, HEIGHT);
cairo_set_target_surface (cr, stamp);
cairo_new_path (cr);
cairo_rectangle (cr, WIDTH / 4, HEIGHT / 4, WIDTH / 2, HEIGHT / 2);
cairo_set_rgb_color (cr, 1, 0, 0);
cairo_set_alpha (cr, 0.8);
cairo_fill (cr);
cairo_rectangle (cr, 0, 0, WIDTH, HEIGHT);
cairo_set_line_width (cr, 2);
cairo_set_rgb_color (cr, 0, 0, 0);
cairo_set_alpha (cr, 1);
cairo_stroke (cr);
cairo_set_target_surface (cr, target);
/* Draw a translucent rectangle for reference where the rotated
* image should be. */
cairo_new_path (cr);
cairo_rectangle (cr, WIDTH, HEIGHT, WIDTH, HEIGHT);
cairo_set_rgb_color (cr, 1, 1, 0);
cairo_set_alpha (cr, 0.3);
cairo_fill (cr);
#if 1 /* Set to 0 to generate reference image */
cairo_translate (cr, 2 * WIDTH, 2 * HEIGHT);
cairo_rotate (cr, M_PI);
#else
cairo_translate (cr, WIDTH, HEIGHT);
#endif
cairo_set_alpha (cr, 1);
cairo_show_surface (cr, stamp, WIDTH + 2, HEIGHT + 2);
cairo_show_page (cr);
cairo_surface_destroy (stamp);
cairo_surface_destroy (target);
}
JNIEXPORT void JNICALL Java_gnu_java_awt_peer_gtk_GdkGraphics2D_gdkDrawDrawable
(JNIEnv *env, jobject self, jobject other, jint x, jint y)
{
struct graphics2d *src = NULL, *dst = NULL;
gint s_height, s_width, d_height, d_width, height, width;
cairo_matrix_t *matrix;
cairo_operator_t tmp_op;
gdk_threads_enter();
if (peer_is_disposed(env, self)) { gdk_threads_leave(); return; }
src = (struct graphics2d *)NSA_GET_G2D_PTR (env, other);
dst = (struct graphics2d *)NSA_GET_G2D_PTR (env, self);
g_assert (src != NULL);
g_assert (dst != NULL);
if (src->debug) printf ("copying from offscreen drawable\n");
begin_drawing_operation(dst);
gdk_flush();
gdk_drawable_get_size (src->drawable, &s_width, &s_height);
gdk_drawable_get_size (dst->drawable, &d_width, &d_height);
width = min (s_width, d_width);
height = min (s_height, d_height);
matrix = cairo_matrix_create ();
cairo_surface_get_matrix (src->surface, matrix);
cairo_matrix_translate (matrix, (double)-x, (double)-y);
cairo_surface_set_matrix (src->surface, matrix);
tmp_op = cairo_current_operator (dst->cr);
cairo_set_operator(dst->cr, CAIRO_OPERATOR_SRC);
cairo_show_surface (dst->cr, src->surface, width, height);
cairo_set_operator(dst->cr, tmp_op);
cairo_matrix_translate (matrix, (double)x, (double)y);
cairo_surface_set_matrix (src->surface, matrix);
cairo_matrix_destroy (matrix);
gdk_flush();
end_drawing_operation(dst);
if (src->debug) printf ("copied %d x %d pixels from offscreen drawable\n", width, height);
gdk_threads_leave();
}
