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-rw-r--r--printing.c126
1 files changed, 101 insertions, 25 deletions
diff --git a/printing.c b/printing.c
index e3b5431..d75a68e 100644
--- a/printing.c
+++ b/printing.c
@@ -1,6 +1,5 @@
/* See LICENSE file for copyright and license details. */
#include "common.h"
-#include <math.h>
#define LIST_UNITS(X, ...)\
X(UNIT_MILLIMETRES, "Millimetres", 72.0 / 25.4) __VA_ARGS__\
@@ -45,6 +44,7 @@ struct print_data {
double height;
double left;
double top;
+ double aspect;
};
struct positioning_widget {
@@ -117,6 +117,35 @@ get_printable_size(GtkPageSetup *setup, double *width, double *height)
*height = MAX(*height, 0.1);
}
+static int
+get_dpi_option(GdkPixbuf *image, const char *name, double *dpi)
+{
+ const char *text = gdk_pixbuf_get_option(image, name);
+ char *end;
+ double value;
+ if (!text)
+ return 0;
+ value = strtod(text, &end);
+ while (isspace(*(unsigned char *)end))
+ end++;
+ if (end == text || *end || !isfinite(value) || value <= 0.0)
+ return 0;
+ *dpi = value;
+ return 1;
+}
+
+static int
+get_print_size_from_resolution(GdkPixbuf *image, double *width, double *height)
+{
+ double x_dpi, y_dpi;
+ if (!get_dpi_option(image, "x-dpi", &x_dpi) ||
+ !get_dpi_option(image, "y-dpi", &y_dpi))
+ return 0;
+ *width = 72.0 * gdk_pixbuf_get_width(image) / x_dpi;
+ *height = 72.0 * gdk_pixbuf_get_height(image) / y_dpi;
+ return 1;
+}
+
static double
get_preview_scale(GtkWidget *preview, struct positioning_widget *widget)
{
@@ -146,8 +175,6 @@ static int
set_field_value(struct positioning_widget *widget, enum field field, double value)
{
struct print_data *data = widget->data;
- int image_width = gdk_pixbuf_get_width(data->image);
- int image_height = gdk_pixbuf_get_height(data->image);
double aspect, pos, size, page, pos_opp, size_opp, page_opp;
double new_pos, new_size, new_pos_opp, new_size_opp;
double *posp, *pos_oppp, *sizep, *size_oppp, limit;
@@ -162,7 +189,7 @@ set_field_value(struct positioning_widget *widget, enum field field, double valu
pos_oppp = &data->top;
size_oppp = &data->height;
page_opp = widget->page_height;
- aspect = (double)image_height / (double)image_width;
+ aspect = 1.0 / data->aspect;
break;
case FIELD_HEIGHT:
@@ -174,7 +201,7 @@ set_field_value(struct positioning_widget *widget, enum field field, double valu
pos_oppp = &data->left;
size_oppp = &data->width;
page_opp = widget->page_width;
- aspect = (double)image_width / (double)image_height;
+ aspect = data->aspect;
break;
}
@@ -257,12 +284,14 @@ positioning_preview_expose(GtkWidget *preview, GdkEventExpose *event, void *user
double scale = get_preview_scale(preview, widget);
double w = scale * widget->page_width;
double h = scale * widget->page_height;
- double image_scale;
double page_x = preview->allocation.width - 8.0 - w;
double page_y = 8.0;
- int image_width;
+ int width, height;
cairo_t *cr;
+ width = gdk_pixbuf_get_width(data->image);
+ height = gdk_pixbuf_get_height(data->image);
+
cr = gdk_cairo_create(preview->window);
cairo_rectangle(cr, event->area.x, event->area.y, event->area.width, event->area.height);
@@ -278,10 +307,8 @@ positioning_preview_expose(GtkWidget *preview, GdkEventExpose *event, void *user
cairo_rectangle(cr, page_x, page_y, w, h);
cairo_clip(cr);
- image_width = gdk_pixbuf_get_width(data->image);
- image_scale = scale * data->width / (double)image_width;
cairo_translate(cr, page_x + scale * data->left, page_y + scale * data->top);
- cairo_scale(cr, image_scale, image_scale);
+ cairo_scale(cr, scale * data->width / width, scale * data->height / height);
gdk_cairo_set_source_pixbuf(cr, data->image, 0.0, 0.0);
cairo_paint(cr);
@@ -409,7 +436,6 @@ positioning_preview_scrolled(GtkWidget *preview, GdkEventScroll *event, void *us
{
struct positioning_widget *widget = user;
struct print_data *data = widget->data;
- int image_width, image_height;
double aspect, amount, scale, page_x;
double pointer_x, pointer_y;
double maximum, width, height;
@@ -427,9 +453,7 @@ positioning_preview_scrolled(GtkWidget *preview, GdkEventScroll *event, void *us
}
amount *= widget->page_width;
- image_width = gdk_pixbuf_get_width(data->image);
- image_height = gdk_pixbuf_get_height(data->image);
- aspect = (double)image_width / (double)image_height;
+ aspect = data->aspect;
maximum = MIN(widget->page_width, widget->page_height * aspect);
width = CLAMP(data->width + amount, 0.0, maximum);
@@ -573,6 +597,24 @@ positioning_entry_focus_out(GtkWidget *entry, GdkEventFocus *event, void *user)
return 0;
}
+static void
+positioning_centre_horizontally(GtkButton *button, void *user)
+{
+ struct positioning_widget *widget = user;
+ (void) button;
+ widget->data->left = 0.5 * (widget->page_width - widget->data->width);
+ update_positioning_widget(widget, NFIELDS);
+}
+
+static void
+positioning_centre_vertically(GtkButton *button, void *user)
+{
+ struct positioning_widget *widget = user;
+ (void) button;
+ widget->data->top = 0.5 * (widget->page_height - widget->data->height);
+ update_positioning_widget(widget, NFIELDS);
+}
+
static GtkWidget *
create_positioning_widget(GtkPrintOperation *operation, void *user)
{
@@ -590,7 +632,7 @@ create_positioning_widget(GtkPrintOperation *operation, void *user)
struct print_data *data = user;
struct positioning_widget *positioning;
GtkPageSetup *setup;
- GtkWidget *box, *grid, *label;
+ GtkWidget *box, *grid, *label, *button;
enum field field;
size_t unit;
unsigned int row, column;
@@ -601,7 +643,7 @@ create_positioning_widget(GtkPrintOperation *operation, void *user)
get_printable_size(setup, &positioning->page_width, &positioning->page_height);
box = gtk_hbox_new(0, 12);
- grid = gtk_table_new(4, 4, 0);
+ grid = gtk_table_new(5, 4, 0);
gtk_container_set_border_width(GTK_CONTAINER(grid), 8);
gtk_table_set_row_spacings(GTK_TABLE(grid), 6);
gtk_table_set_col_spacings(GTK_TABLE(grid), 6);
@@ -643,6 +685,12 @@ create_positioning_widget(GtkPrintOperation *operation, void *user)
GTK_FILL, 0, 4u, 4u);
}
}
+ button = gtk_button_new_with_mnemonic("Centre h_orizontally");
+ g_signal_connect(button, "clicked", G_CALLBACK(&positioning_centre_horizontally), positioning);
+ gtk_table_attach(GTK_TABLE(grid), button, 0, 2, 4, 5, GTK_EXPAND | GTK_FILL, 0, 4u, 4u);
+ button = gtk_button_new_with_mnemonic("Centre v_ertically");
+ g_signal_connect(button, "clicked", G_CALLBACK(&positioning_centre_vertically), positioning);
+ gtk_table_attach(GTK_TABLE(grid), button, 2, 4, 4, 5, GTK_EXPAND | GTK_FILL, 0, 4u, 4u);
positioning->preview = gtk_drawing_area_new();
gtk_widget_set_size_request(positioning->preview, 200, 200);
gtk_widget_add_events(positioning->preview,
@@ -695,16 +743,18 @@ draw_page(GtkPrintOperation *operation, GtkPrintContext *context, int page, void
{
struct print_data *data = user;
GdkPixbuf *image = data->image;
- double scale;
+ int width, height;
cairo_t *cr;
(void) operation;
(void) page;
- scale = data->width / gdk_pixbuf_get_width(image);
+ width = gdk_pixbuf_get_width(image);
+ height = gdk_pixbuf_get_height(image);
+
cr = gtk_print_context_get_cairo_context(context);
cairo_translate(cr, data->left, data->top);
- cairo_scale(cr, scale, scale);
+ cairo_scale(cr, data->width / (double)width, data->height / (double)height);
gdk_cairo_set_source_pixbuf(cr, image, 0.0, 0.0);
cairo_paint(cr);
}
@@ -715,8 +765,10 @@ open_print(GdkPixbuf *image)
struct print_data data;
GtkPrintOperation *operation;
GtkPageSetup *setup;
+ GdkPixbuf *metadata_image;
GtkPageOrientation orientation = GTK_PAGE_ORIENTATION_PORTRAIT;
- double page_width, page_height, s, x, y;
+ double page_width, page_height, s, x, y, temporary;
+ int has_physical_size;
int width, height;
if (!image)
@@ -727,19 +779,43 @@ open_print(GdkPixbuf *image)
width = gdk_pixbuf_get_width(data.image);
height = gdk_pixbuf_get_height(data.image);
+ metadata_image = get_original_image();
+ if (!metadata_image)
+ metadata_image = data.image;
+ has_physical_size = get_print_size_from_resolution(metadata_image, &data.width, &data.height);
+ if (!has_physical_size) {
+ data.width = width;
+ data.height = height;
+ } else {
+ switch (trans & 7u) {
+ case TRANS_CLOCKWISE:
+ case TRANS_ANTICLOCKWISE:
+ case TRANS_TRANSPOSE:
+ case TRANS_ANTITRANSPOSE:
+ temporary = data.width;
+ data.width = data.height;
+ data.height = temporary;
+ break;
+ default:
+ break;
+ }
+ }
+ data.aspect = data.width / data.height;
- if (width > height)
+ if (data.width > data.height)
orientation = GTK_PAGE_ORIENTATION_LANDSCAPE;
setup = gtk_page_setup_new();
gtk_page_setup_set_orientation(setup, orientation);
get_printable_size(setup, &page_width, &page_height);
- x = page_width / (double)width;
- y = page_height / (double)height;
+ x = page_width / data.width;
+ y = page_height / data.height;
s = MIN(x, y);
- data.width = s * width;
- data.height = s * height;
+ if (!has_physical_size || s < 1.0) {
+ data.width *= s;
+ data.height *= s;
+ }
data.left = 0.5 * (page_width - data.width);
data.top = 0.5 * (page_height - data.height);
generated by cgit v1.3.1 (git 2.54.0) at 2026-10-15 12:50:23 +0000