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Diffstat (limited to 'plug-ins/print/print-draw-page.c')
| -rw-r--r-- | plug-ins/print/print-draw-page.c | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/plug-ins/print/print-draw-page.c b/plug-ins/print/print-draw-page.c new file mode 100644 index 0000000..588cbde --- /dev/null +++ b/plug-ins/print/print-draw-page.c @@ -0,0 +1,222 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995 Spencer Kimball and Peter Mattis + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#include "config.h" + +#include <string.h> + +#include <libgimp/gimp.h> +#include <libgimp/gimpui.h> + +#include "print.h" +#include "print-draw-page.h" + +#include "libgimp/stdplugins-intl.h" + + +static cairo_surface_t * print_surface_from_drawable (gint32 drawable_ID, + GError **error); + +static void print_draw_crop_marks (GtkPrintContext *context, + gdouble x, + gdouble y, + gdouble w, + gdouble h); + +gboolean +print_draw_page (GtkPrintContext *context, + PrintData *data, + GError **error) +{ + cairo_t *cr = gtk_print_context_get_cairo_context (context); + cairo_surface_t *surface; + + surface = print_surface_from_drawable (data->drawable_id, error); + + if (surface) + { + gint width; + gint height; + gdouble scale_x; + gdouble scale_y; + + /* create a white rectangle covering the entire page, just + * to be safe; see bug #777233. + */ + cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 1.0); + cairo_paint (cr); + + 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 / 72.0 * gtk_print_context_get_dpi_x (context), + data->offset_y / 72.0 * gtk_print_context_get_dpi_y (context)); + + 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; + } + + return FALSE; +} + +static cairo_surface_t * +print_surface_from_drawable (gint32 drawable_ID, + GError **error) +{ + GeglBuffer *buffer = gimp_drawable_get_buffer (drawable_ID); + const Babl *format; + cairo_surface_t *surface; + cairo_status_t status; + const gint width = gimp_drawable_width (drawable_ID); + const gint height = gimp_drawable_height (drawable_ID); + GeglBufferIterator *iter; + guchar *pixels; + gint stride; + guint count = 0; + guint64 done = 0; + + if (gimp_drawable_has_alpha (drawable_ID)) + format = babl_format ("cairo-ARGB32"); + else + format = babl_format ("cairo-RGB24"); + + surface = cairo_image_surface_create (gimp_drawable_has_alpha (drawable_ID) ? + CAIRO_FORMAT_ARGB32 : + CAIRO_FORMAT_RGB24, + width, height); + + status = cairo_surface_status (surface); + if (status != CAIRO_STATUS_SUCCESS) + { + switch (status) + { + case CAIRO_STATUS_INVALID_SIZE: + g_set_error_literal (error, + GIMP_PLUGIN_PRINT_ERROR, + GIMP_PLUGIN_PRINT_ERROR_FAILED, + _("Cannot handle the size (either width or height) of the image.")); + break; + default: + g_set_error (error, + GIMP_PLUGIN_PRINT_ERROR, + GIMP_PLUGIN_PRINT_ERROR_FAILED, + "Cairo error: %s", + cairo_status_to_string (status)); + break; + } + + return NULL; + } + + pixels = cairo_image_surface_get_data (surface); + stride = cairo_image_surface_get_stride (surface); + + iter = gegl_buffer_iterator_new (buffer, + GEGL_RECTANGLE (0, 0, width, height), 0, + format, + GEGL_ACCESS_READ, GEGL_ABYSS_NONE, 1); + + while (gegl_buffer_iterator_next (iter)) + { + const guchar *src = iter->items[0].data; + guchar *dest = pixels + (guint64) iter->items[0].roi.y * stride + iter->items[0].roi.x * 4; + gint y; + + for (y = 0; y < iter->items[0].roi.height; y++) + { + memcpy (dest, src, iter->items[0].roi.width * 4); + + src += iter->items[0].roi.width * 4; + dest += stride; + } + + done += (guint64) iter->items[0].roi.height * iter->items[0].roi.width; + + if (count++ % 16 == 0) + gimp_progress_update ((gdouble) done / ((gdouble) width * height)); + } + + g_object_unref (buffer); + + cairo_surface_mark_dirty (surface); + + gimp_progress_update (1.0); + + return surface; +} + +static void +print_draw_crop_marks (GtkPrintContext *context, + gdouble x, + gdouble y, + gdouble w, + gdouble h) +{ + cairo_t *cr = gtk_print_context_get_cairo_context (context); + gdouble len = MIN (gtk_print_context_get_width (context), + gtk_print_context_get_height (context)) / 20.0; + + /* upper left */ + + cairo_move_to (cr, x - len, y); + cairo_line_to (cr, x - len / 5, y); + + cairo_move_to (cr, x, y - len); + cairo_line_to (cr, x, y - len / 5); + + /* upper right */ + + cairo_move_to (cr, x + w + len / 5, y); + cairo_line_to (cr, x + w + len, y); + + cairo_move_to (cr, x + w, y - len); + cairo_line_to (cr, x + w, y - len / 5); + + /* lower left */ + + cairo_move_to (cr, x - len, y + h); + cairo_line_to (cr, x - len / 5, y + h); + + cairo_move_to (cr, x, y + h + len); + cairo_line_to (cr, x, y + h + len / 5); + + /* lower right */ + + cairo_move_to (cr, x + w + len / 5, y + h); + cairo_line_to (cr, x + w + len, y + h); + + cairo_move_to (cr, x + w, y + h + len); + cairo_line_to (cr, x + w, y + h + len / 5); + + cairo_set_source_rgb (cr, 0.5, 0.5, 0.5); + cairo_set_line_width (cr, 2); + cairo_stroke (cr); +} |