
* plug-ins/print/print.[ch] * plug-ins/print/print-draw-page.[ch] * plug-ins/print/print-page-layout.c * plug-ins/print/print-settings.c: implement preview internally, assorted other small changes.
331 lines
9.9 KiB
C
331 lines
9.9 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <string.h>
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#include <time.h>
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#include <libgimp/gimp.h>
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#include <libgimp/gimpui.h>
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#include "print.h"
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#include "print-draw-page.h"
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#include "libgimp/stdplugins-intl.h"
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/* In points */
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#define HEADER_HEIGHT (20*72/25.4)
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#define EPSILON 0.0001
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static guchar * get_image_pixels (PrintData *data,
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gint *width_ptr,
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gint *height_ptr,
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gint *rowstride_ptr);
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static void draw_info_header (GtkPrintContext *context,
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cairo_t *cr,
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PrintData *data);
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gboolean
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draw_page_cairo (GtkPrintContext *context,
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PrintData *data)
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{
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cairo_t *cr;
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gdouble cr_width;
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gdouble cr_height;
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gdouble cr_dpi_x;
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gdouble cr_dpi_y;
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gint image_width;
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gint image_height;
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gint image_rowstride;
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gdouble scale_x;
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gdouble scale_y;
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gdouble x0 = 0;
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gdouble y0 = 0;
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guchar *pixels;
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cairo_surface_t *surface;
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gint32 image_id = data->image_id;
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gdouble image_xres;
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gdouble image_yres;
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cr = gtk_print_context_get_cairo_context (context);
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cr_width = gtk_print_context_get_width (context);
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cr_height = gtk_print_context_get_height (context);
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cr_dpi_x = gtk_print_context_get_dpi_x (context);
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cr_dpi_y = gtk_print_context_get_dpi_y (context);
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gimp_image_get_resolution (image_id, &image_xres, &image_yres);
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pixels = get_image_pixels (data, &image_width, &image_height,
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&image_rowstride);
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scale_x = cr_dpi_x / image_xres;
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scale_y = cr_dpi_y / image_yres;
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if (scale_x * image_width > cr_width + EPSILON)
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{
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g_message (_("Image width (%lg in) is larger than printable width (%lg in)."),
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image_width / image_xres, cr_width / cr_dpi_x);
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gtk_print_operation_cancel (data->operation);
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return FALSE;
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}
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if (scale_y * image_height > cr_height + EPSILON)
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{
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g_message (_("Image height (%lg in) is larger than printable height (%lg in)."),
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image_height / image_yres, cr_height / cr_dpi_y);
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gtk_print_operation_cancel (data->operation);
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return FALSE;
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}
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/* print header if it is requested */
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if (data->show_info_header)
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{
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draw_info_header (context, cr, data);
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cairo_translate (cr, 0, HEADER_HEIGHT);
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cr_height -= HEADER_HEIGHT;
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}
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x0 = (cr_width - scale_x * image_width) / 2;
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y0 = (cr_height - scale_y * image_height) / 2;
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surface = cairo_image_surface_create_for_data (pixels, CAIRO_FORMAT_ARGB32,
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image_width, image_height,
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image_rowstride);
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cairo_translate (cr, x0, y0);
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cairo_scale (cr, scale_x, scale_y);
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cairo_set_source_surface (cr, surface, 0, 0);
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cairo_mask_surface (cr, surface, 0, 0);
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g_free (pixels);
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return TRUE;
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}
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static guchar *
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get_image_pixels (PrintData *data,
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gint *width_ptr,
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gint *height_ptr,
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gint *rowstride_ptr)
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{
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gint32 image_id = data->image_id;
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gint32 drawable_id = data->drawable_id;
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GimpDrawable *drawable;
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GimpPixelRgn region;
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gint width;
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gint height;
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gint rowstride;
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guchar *pixels;
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guint32 *cairo_data;
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gint len;
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guchar *p;
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gint i;
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/* export the image */
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gimp_export_image (&image_id, &drawable_id, NULL,
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GIMP_EXPORT_CAN_HANDLE_RGB |
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GIMP_EXPORT_CAN_HANDLE_ALPHA |
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GIMP_EXPORT_NEEDS_ALPHA);
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drawable = gimp_drawable_get (drawable_id);
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width = drawable->width;
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height = drawable->height;
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rowstride = width * drawable->bpp;
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pixels = g_new (guchar, height * rowstride);
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gimp_pixel_rgn_init (®ion, drawable, 0, 0, width, height, FALSE, FALSE);
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gimp_pixel_rgn_get_rect (®ion, pixels, 0, 0, width, height);
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gimp_drawable_detach (drawable);
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if (image_id != data->image_id)
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gimp_image_delete (image_id);
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/* knock pixels into the shape requested by cairo:
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*
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* CAIRO_FORMAT_ARGB32:
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* each pixel is a 32-bit quantity, with alpha in the upper 8 bits,
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* then red, then green, then blue. The 32-bit quantities are
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* stored native-endian. Pre-multiplied alpha is used.
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*
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*/
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cairo_data = (guint32 *) pixels;
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len = width * height;
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for (i = 0, p = pixels; i < len; i++)
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{
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guint32 r = *p++;
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guint32 g = *p++;
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guint32 b = *p++;
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guint32 a = *p++;
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if (a != 255)
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{
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gdouble alpha = a / 255.0;
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r *= alpha;
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g *= alpha;
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b *= alpha;
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}
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cairo_data[i] = (a << 24) + (r << 16) + (g << 8) + b;
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}
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*width_ptr = width;
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*height_ptr = height;
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*rowstride_ptr = rowstride;
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return pixels;
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}
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static void
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draw_info_header (GtkPrintContext *context,
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cairo_t *cr,
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PrintData *data)
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{
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PangoLayout *layout;
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PangoFontDescription *desc;
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gdouble text_height;
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gdouble text_width;
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gdouble fname_text_width;
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gint layout_height;
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gint layout_width;
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gchar date_buffer[100];
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GDate *date;
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const gchar *name_str;
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GimpParasite *parasite;
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const gchar *end_ptr;
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gchar *filename;
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gdouble cr_width;
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cairo_save (cr);
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cr_width = gtk_print_context_get_width (context);
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cairo_rectangle (cr, 0, 0, cr_width, HEADER_HEIGHT);
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cairo_set_source_rgb (cr, 0.8, 0.8, 0.8);
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cairo_fill_preserve (cr);
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cairo_set_source_rgb (cr, 0, 0, 0);
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cairo_set_line_width (cr, 1);
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cairo_stroke (cr);
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layout = gtk_print_context_create_pango_layout (context);
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desc = pango_font_description_from_string ("sans 14");
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pango_layout_set_font_description (layout, desc);
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pango_font_description_free (desc);
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pango_layout_set_width (layout, -1);
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pango_layout_set_alignment (layout, PANGO_ALIGN_CENTER);
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/* image name */
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pango_layout_set_text (layout, gimp_image_get_name (data->image_id), -1);
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pango_layout_get_size (layout, &layout_width, &layout_height);
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text_height = (gdouble) layout_height / PANGO_SCALE;
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cairo_move_to (cr, 0.02 * cr_width, (HEADER_HEIGHT - text_height) / 5);
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pango_cairo_show_layout (cr, layout);
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/* user name */
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name_str = g_get_real_name ();
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if (name_str && g_utf8_validate (name_str, -1, &end_ptr))
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{
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pango_layout_set_text (layout, name_str, -1);
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pango_layout_get_size (layout, &layout_width, &layout_height);
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text_height = (gdouble) layout_height / PANGO_SCALE;
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text_width = (gdouble) layout_width / PANGO_SCALE;
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cairo_move_to (cr, 0.5 * cr_width - 0.5 * text_width,
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(HEADER_HEIGHT - text_height) / 5);
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pango_cairo_show_layout (cr, layout);
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}
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/* date */
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date = g_date_new ();
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g_date_set_time_t (date, time (NULL));
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g_date_strftime (date_buffer, 100, "%x", date);
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g_date_free (date);
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pango_layout_set_text (layout, date_buffer, -1);
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pango_layout_get_size (layout, &layout_width, &layout_height);
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text_height = (gdouble) layout_height / PANGO_SCALE;
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text_width = (gdouble) layout_width / PANGO_SCALE;
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cairo_move_to (cr,
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0.98 * cr_width - text_width,
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(HEADER_HEIGHT - text_height) / 5);
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pango_cairo_show_layout (cr, layout);
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/* file name if any */
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filename = gimp_image_get_filename (data->image_id);
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if (filename)
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{
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pango_layout_set_text (layout,
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gimp_filename_to_utf8 (filename), -1);
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g_free (filename);
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pango_layout_get_size (layout, &layout_width, &layout_height);
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text_height = (gdouble) layout_height / PANGO_SCALE;
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fname_text_width = (gdouble) layout_width / PANGO_SCALE;
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cairo_move_to (cr,
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0.02 * cr_width, 4 * (HEADER_HEIGHT - text_height) / 5);
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pango_cairo_show_layout (cr, layout);
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}
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else
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{
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fname_text_width = 0;
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}
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/* image comment if it is short */
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parasite = gimp_image_parasite_find (data->image_id, "gimp-comment");
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if (parasite)
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{
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pango_layout_set_text (layout, gimp_parasite_data (parasite), -1);
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pango_layout_get_size (layout, &layout_width, &layout_height);
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text_height = (gdouble) layout_height / PANGO_SCALE;
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text_width = (gdouble) layout_width / PANGO_SCALE;
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if (fname_text_width + text_width < 0.8 * cr_width &&
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text_height < 0.5 * HEADER_HEIGHT)
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{
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cairo_move_to (cr, 0.98 * cr_width - text_width,
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4 * (HEADER_HEIGHT - text_height) / 5);
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pango_cairo_show_layout (cr, layout);
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}
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gimp_parasite_free (parasite);
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}
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g_object_unref (layout);
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cairo_restore (cr);
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}
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