static void
draw_page (GtkPrintOperation *operation,
GtkPrintContext *context,
gint page_nr,
gpointer user_data)
{
ViewerCbInfo *info = (ViewerCbInfo *) user_data;
cairo_t *cr;
gdouble page_width, page_height;
cr = gtk_print_context_get_cairo_context (context);
page_width = gtk_print_context_get_width (context);
page_height = gtk_print_context_get_height (context);
{
RsvgHandle *handle;
RsvgDimensionData svg_dimensions;
struct RsvgSizeCallbackData size_data;
/* should not fail */
handle = rsvg_handle_new_from_data(info->svg_bytes->data, info->svg_bytes->len, NULL);
rsvg_handle_set_base_uri (handle, info->base_uri);
rsvg_handle_set_dpi_x_y (handle, gtk_print_context_get_dpi_x(context),
gtk_print_context_get_dpi_y(context));
rsvg_handle_get_dimensions(handle, &svg_dimensions);
if (svg_dimensions.width > page_width || svg_dimensions.height > page_height) {
/* scale down the image to the page's size, while preserving the aspect ratio */
if ((double) svg_dimensions.height * (double) page_width > (double) svg_dimensions.width * (double) page_height) {
svg_dimensions.width = 0.5 + (double) svg_dimensions.width *(double) page_height / (double) svg_dimensions.height;
svg_dimensions.height = page_height;
} else {
svg_dimensions.height = 0.5 + (double) svg_dimensions.height *(double) page_width / (double) svg_dimensions.width;
svg_dimensions.width = page_width;
}
}
size_data.type = RSVG_SIZE_WH;
size_data.width = svg_dimensions.width;
size_data.height = svg_dimensions.height;
size_data.keep_aspect_ratio = FALSE;
rsvg_handle_set_size_callback (handle, _rsvg_size_callback, &size_data, NULL);
rsvg_handle_render_cairo(handle, cr);
g_object_unref (handle);
}
}
JNIEXPORT jdouble JNICALL
Java_org_gnome_gtk_GtkPrintContext_gtk_1print_1context_1get_1dpi_1y
(
JNIEnv* env,
jclass cls,
jlong _self
)
{
gdouble result;
jdouble _result;
GtkPrintContext* self;
// convert parameter self
self = (GtkPrintContext*) _self;
// call function
result = gtk_print_context_get_dpi_y(self);
// cleanup parameter self
// translate return value to JNI type
_result = (jdouble) result;
// and finally
return _result;
}
static int
create_cairo(struct objlist *obj, N_VALUE *inst, N_VALUE *rval, int argc, char **argv)
{
cairo_t *cairo;
int dpi, id, r;
struct gra2cairo_local *local;
GtkPrintContext *gpc;
gpc = GTK_PRINT_CONTEXT(argv[2]);
if (gpc == NULL) {
error(obj, CAIRO_STATUS_NULL_POINTER + 100);
return 1;
}
cairo = gtk_print_context_get_cairo_context(gpc);
r = cairo_status(cairo);
if (r != CAIRO_STATUS_SUCCESS) {
error(obj, r + 100);
return 1;
}
_getobj(obj, "id", inst, &id);
dpi = gtk_print_context_get_dpi_x(gpc);
if (putobj(obj, "dpix", id, &dpi) < 0) {
error(obj, ERRFIELD);
return 1;
}
dpi = gtk_print_context_get_dpi_y(gpc);
if (putobj(obj, "dpiy", id, &dpi) < 0) {
error(obj, ERRFIELD);
return 1;
}
_getobj(obj, "_local", inst, &local);
local->cairo = cairo;
return 0;
}
gboolean
print_draw_page (GtkPrintContext *context,
PrintData *data,
GError **error)
{
cairo_t *cr = gtk_print_context_get_cairo_context (context);
cairo_surface_t *surface;
gint width;
gint height;
gdouble scale_x;
gdouble scale_y;
surface = print_surface_from_drawable (data->drawable_id, error);
if (surface)
{
width = cairo_image_surface_get_width (surface);
height = cairo_image_surface_get_height (surface);
scale_x = gtk_print_context_get_dpi_x (context) / data->xres;
scale_y = gtk_print_context_get_dpi_y (context) / data->yres;
cairo_translate (cr, data->offset_x, data->offset_y);
if (data->draw_crop_marks)
print_draw_crop_marks (context,
0, 0, width * scale_x, height * scale_y);
cairo_scale (cr, scale_x, scale_y);
cairo_rectangle (cr, 0, 0, width, height);
cairo_set_source_surface (cr, surface, 0, 0);
cairo_fill (cr);
cairo_surface_destroy (surface);
return TRUE;
}
else
{
return FALSE;
}
}
static gboolean
preview_draw (GtkWidget *widget,
cairo_t *cr,
gpointer data)
{
PreviewOp *pop = data;
cairo_t *prev_cr;
double dpi_x, dpi_y;
prev_cr = gtk_print_context_get_cairo_context (pop->context);
cairo_reference (prev_cr);
dpi_x = gtk_print_context_get_dpi_x (pop->context);
dpi_y = gtk_print_context_get_dpi_y (pop->context);
gtk_print_context_set_cairo_context (pop->context,
cr, dpi_x, dpi_y);
gtk_print_operation_preview_render_page (pop->preview,
pop->page - 1);
gtk_print_context_set_cairo_context (pop->context,
prev_cr, dpi_x, dpi_y);
cairo_destroy (prev_cr);
return TRUE;
}
gboolean
draw_page_cairo (GtkPrintContext *context,
PrintData *data)
{
GimpDrawable *drawable = gimp_drawable_get (data->drawable_id);
GimpPixelRgn region;
cairo_t *cr;
cairo_surface_t *surface;
guchar *pixels;
gdouble cr_width;
gdouble cr_height;
gdouble cr_dpi_x;
gdouble cr_dpi_y;
gint width;
gint height;
gint stride;
gint y;
gdouble scale_x;
gdouble scale_y;
width = drawable->width;
height = drawable->height;
gimp_tile_cache_ntiles (width / gimp_tile_width () + 1);
cr = gtk_print_context_get_cairo_context (context);
cr_width = gtk_print_context_get_width (context);
cr_height = gtk_print_context_get_height (context);
cr_dpi_x = gtk_print_context_get_dpi_x (context);
cr_dpi_y = gtk_print_context_get_dpi_y (context);
scale_x = cr_dpi_x / data->xres;
scale_y = cr_dpi_y / data->yres;
#if 0
/* print header if it is requested */
if (data->show_info_header)
{
draw_info_header (context, cr, data);
/* In points */
#define HEADER_HEIGHT (20 * 72.0 / 25.4)
cairo_translate (cr, 0, HEADER_HEIGHT);
cr_height -= HEADER_HEIGHT;
}
#endif
cairo_translate (cr,
data->offset_x / cr_dpi_x * 72.0,
data->offset_y / cr_dpi_y * 72.0);
cairo_scale (cr, scale_x, scale_y);
gimp_pixel_rgn_init (®ion, drawable, 0, 0, width, height, FALSE, FALSE);
surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, height);
pixels = cairo_image_surface_get_data (surface);
stride = cairo_image_surface_get_stride (surface);
for (y = 0; y < height; y++, pixels += stride)
{
gimp_pixel_rgn_get_row (®ion, pixels, 0, y, width);
switch (drawable->bpp)
{
case 3:
convert_from_rgb (pixels, width);
break;
case 4:
convert_from_rgba (pixels, width);
break;
}
if (y % 16 == 0)
gimp_progress_update ((gdouble) y / (gdouble) height);
}
cairo_set_source_surface (cr, surface, 0, 0);
cairo_rectangle (cr, 0, 0, width, height);
cairo_fill (cr);
cairo_surface_destroy (surface);
gimp_progress_update (1.0);
gimp_drawable_detach (drawable);
return TRUE;
}
static void
xviewer_print_draw_page (GtkPrintOperation *operation,
GtkPrintContext *context,
gint page_nr,
gpointer user_data)
{
cairo_t *cr;
gdouble dpi_x, dpi_y;
gdouble x0, y0;
gdouble scale_factor;
gdouble p_width, p_height;
gint width, height;
XviewerPrintData *data;
GtkPageSetup *page_setup;
xviewer_debug (DEBUG_PRINTING);
data = (XviewerPrintData *) user_data;
scale_factor = data->scale_factor/100;
dpi_x = gtk_print_context_get_dpi_x (context);
dpi_y = gtk_print_context_get_dpi_y (context);
switch (data->unit) {
case GTK_UNIT_INCH:
x0 = data->left_margin * dpi_x;
y0 = data->top_margin * dpi_y;
break;
case GTK_UNIT_MM:
x0 = data->left_margin * dpi_x/25.4;
y0 = data->top_margin * dpi_y/25.4;
break;
default:
g_assert_not_reached ();
}
cr = gtk_print_context_get_cairo_context (context);
cairo_translate (cr, x0, y0);
page_setup = gtk_print_context_get_page_setup (context);
p_width = gtk_page_setup_get_page_width (page_setup, GTK_UNIT_POINTS);
p_height = gtk_page_setup_get_page_height (page_setup, GTK_UNIT_POINTS);
xviewer_image_get_size (data->image, &width, &height);
/* this is both a workaround for a bug in cairo's PDF backend, and
a way to ensure we are not printing outside the page margins */
cairo_rectangle (cr, 0, 0, MIN (width*scale_factor, p_width), MIN (height*scale_factor, p_height));
cairo_clip (cr);
cairo_scale (cr, scale_factor, scale_factor);
#ifdef HAVE_RSVG
if (xviewer_image_is_svg (data->image))
{
RsvgHandle *svg = xviewer_image_get_svg (data->image);
rsvg_handle_render_cairo (svg, cr);
return;
} else
#endif
/* JPEGs can be attached to the cairo surface which simply embeds the JPEG file into the
* destination PDF skipping (PNG-)recompression. This should reduce PDF sizes enormously. */
if (xviewer_image_is_jpeg (data->image) && _cairo_ctx_supports_jpg_metadata (cr))
{
GFile *file;
char *img_data;
gsize data_len;
cairo_surface_t *surface = NULL;
xviewer_debug_message (DEBUG_PRINTING, "Attaching image to cairo surface");
file = xviewer_image_get_file (data->image);
if (g_file_load_contents (file, NULL, &img_data, &data_len, NULL, NULL))
{
XviewerTransform *tf = xviewer_image_get_transform (data->image);
XviewerTransform *auto_tf = xviewer_image_get_autorotate_transform (data->image);
cairo_matrix_t mx, mx2;
if (!tf && auto_tf) {
/* If only autorotation data present,
* make it the normal rotation. */
tf = auto_tf;
auto_tf = NULL;
}
/* Care must be taken with height and width values. They are not the original
* values but were affected by the transformation. As the surface needs to be
* generated using the original dimensions they might need to be flipped. */
if (tf) {
if (auto_tf) {
/* If we have an autorotation apply
* it before the others */
tf = xviewer_transform_compose (auto_tf, tf);
}
switch (xviewer_transform_get_transform_type (tf)) {
case XVIEWER_TRANSFORM_ROT_90:
surface = cairo_image_surface_create (
CAIRO_FORMAT_RGB24, height, width);
cairo_rotate (cr, 90.0 * (G_PI/180.0));
cairo_translate (cr, 0.0, -width);
break;
case XVIEWER_TRANSFORM_ROT_180:
surface = cairo_image_surface_create (
CAIRO_FORMAT_RGB24, width, height);
cairo_rotate (cr, 180.0 * (G_PI/180.0));
cairo_translate (cr, -width, -height);
break;
case XVIEWER_TRANSFORM_ROT_270:
surface = cairo_image_surface_create (
CAIRO_FORMAT_RGB24, height, width);
cairo_rotate (cr, 270.0 * (G_PI/180.0));
cairo_translate (cr, -height, 0.0);
break;
case XVIEWER_TRANSFORM_FLIP_HORIZONTAL:
surface = cairo_image_surface_create (
CAIRO_FORMAT_RGB24, width, height);
cairo_matrix_init_identity (&mx);
_xviewer_cairo_matrix_flip (&mx2, &mx, TRUE, FALSE);
cairo_transform (cr, &mx2);
cairo_translate (cr, -width, 0.0);
break;
case XVIEWER_TRANSFORM_FLIP_VERTICAL:
surface = cairo_image_surface_create (
CAIRO_FORMAT_RGB24, width, height);
cairo_matrix_init_identity (&mx);
_xviewer_cairo_matrix_flip (&mx2, &mx, FALSE, TRUE);
cairo_transform (cr, &mx2);
cairo_translate (cr, 0.0, -height);
break;
case XVIEWER_TRANSFORM_TRANSPOSE:
surface = cairo_image_surface_create (
CAIRO_FORMAT_RGB24, height, width);
cairo_matrix_init_rotate (&mx, 90.0 * (G_PI/180.0));
cairo_matrix_init_identity (&mx2);
_xviewer_cairo_matrix_flip (&mx2, &mx2, TRUE, FALSE);
cairo_matrix_multiply (&mx2, &mx, &mx2);
cairo_transform (cr, &mx2);
break;
case XVIEWER_TRANSFORM_TRANSVERSE:
surface = cairo_image_surface_create (
CAIRO_FORMAT_RGB24, height, width);
cairo_matrix_init_rotate (&mx, 90.0 * (G_PI/180.0));
cairo_matrix_init_identity (&mx2);
_xviewer_cairo_matrix_flip (&mx2, &mx2, FALSE, TRUE);
cairo_matrix_multiply (&mx2, &mx, &mx2);
cairo_transform (cr, &mx2);
cairo_translate (cr, -height , -width);
break;
case XVIEWER_TRANSFORM_NONE:
default:
surface = cairo_image_surface_create (
CAIRO_FORMAT_RGB24, width, height);
break;
}
}
if (!surface)
surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24,
width, height);
cairo_surface_set_mime_data (surface,
CAIRO_MIME_TYPE_JPEG,
(unsigned char*)img_data, data_len,
g_free, img_data);
cairo_set_source_surface (cr, surface, 0, 0);
cairo_paint (cr);
cairo_surface_destroy (surface);
g_object_unref (file);
return;
}
g_object_unref (file);
}
{
GdkPixbuf *pixbuf;
pixbuf = xviewer_image_get_pixbuf (data->image);
gdk_cairo_set_source_pixbuf (cr, pixbuf, 0, 0);
cairo_paint (cr);
g_object_unref (pixbuf);
}
}
static void draw_page_cairo(GtkPrintContext *context, PrintData *data)
{
cairo_t *cr;
GdkPixbuf *pixbuf_to_draw;
cairo_surface_t *surface;
guchar *surface_pixels;
guchar *pixbuf_pixels;
gint stride;
gint pixbuf_stride;
gint pixbuf_n_channels;
gdouble cr_dpi_x;
gdouble cr_dpi_y;
gdouble scale_x;
gdouble scale_y;
gint y;
cr = gtk_print_context_get_cairo_context(context);
pixbuf_to_draw = gdk_pixbuf_get_from_drawable(NULL,
GDK_DRAWABLE(vik_viewport_get_pixmap(data->vvp)),
NULL, 0, 0, 0, 0, data->width, data->height);
surface = cairo_image_surface_create(CAIRO_FORMAT_RGB24,
data->width, data->height);
cr_dpi_x = gtk_print_context_get_dpi_x (context);
cr_dpi_y = gtk_print_context_get_dpi_y (context);
scale_x = cr_dpi_x / data->xres;
scale_y = cr_dpi_y / data->yres;
cairo_translate (cr,
data->offset_x / cr_dpi_x * 72.0,
data->offset_y / cr_dpi_y * 72.0);
cairo_scale (cr, scale_x, scale_y);
surface_pixels = cairo_image_surface_get_data (surface);
stride = cairo_image_surface_get_stride (surface);
pixbuf_pixels = gdk_pixbuf_get_pixels (pixbuf_to_draw);
pixbuf_stride = gdk_pixbuf_get_rowstride(pixbuf_to_draw);
pixbuf_n_channels = gdk_pixbuf_get_n_channels(pixbuf_to_draw);
// fprintf(stderr, "DEBUG: %s() surface_pixels=%p pixbuf_pixels=%p size=%d surface_width=%d surface_height=%d stride=%d data_height=%d pixmap_stride=%d pixmap_nchannels=%d pixmap_bit_per_Sample=%d\n", __PRETTY_FUNCTION__, surface_pixels, pixbuf_pixels, stride * data->height, cairo_image_surface_get_width(surface), cairo_image_surface_get_height(surface), stride, data->height, gdk_pixbuf_get_rowstride(pixbuf_to_draw), gdk_pixbuf_get_n_channels(pixbuf_to_draw), gdk_pixbuf_get_bits_per_sample(pixbuf_to_draw));
/* Assume the pixbuf has 8 bits per channel */
for (y = 0; y < data->height; y++, surface_pixels += stride, pixbuf_pixels += pixbuf_stride) {
switch (pixbuf_n_channels) {
case 3:
copy_row_from_rgb (surface_pixels, pixbuf_pixels, data->width);
break;
case 4:
copy_row_from_rgba (surface_pixels, pixbuf_pixels, data->width);
break;
}
}
g_object_unref(G_OBJECT(pixbuf_to_draw));
cairo_set_source_surface(cr, surface, 0, 0);
cairo_rectangle(cr, 0, 0, data->width, data->height);
cairo_fill(cr);
cairo_surface_destroy(surface);
}
static VALUE
rg_dpi_y(VALUE self)
{
return rb_float_new(gtk_print_context_get_dpi_y(_SELF(self)));
}
