mirror of https://github.com/GNOME/gimp.git
303 lines
7.4 KiB
C
303 lines
7.4 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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* gimpdrawablepreview.c
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* Copyright (C) 2001 Michael Natterer
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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 <gtk/gtk.h>
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#include "libgimpmath/gimpmath.h"
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#include "widgets-types.h"
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#include "base/temp-buf.h"
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#include "core/gimpdrawable.h"
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#include "core/gimpimage.h"
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#include "gimpdrawablepreview.h"
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static void gimp_drawable_preview_class_init (GimpDrawablePreviewClass *klass);
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static void gimp_drawable_preview_init (GimpDrawablePreview *preview);
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static void gimp_drawable_preview_render (GimpPreview *preview);
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static void gimp_drawable_preview_get_size (GimpPreview *preview,
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gint size,
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gint *width,
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gint *height);
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static GtkWidget * gimp_drawable_preview_create_popup (GimpPreview *preview);
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static GimpPreviewClass *parent_class = NULL;
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GtkType
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gimp_drawable_preview_get_type (void)
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{
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static GtkType preview_type = 0;
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if (! preview_type)
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{
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GtkTypeInfo preview_info =
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{
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"GimpDrawablePreview",
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sizeof (GimpDrawablePreview),
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sizeof (GimpDrawablePreviewClass),
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(GtkClassInitFunc) gimp_drawable_preview_class_init,
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(GtkObjectInitFunc) gimp_drawable_preview_init,
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/* reserved_1 */ NULL,
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/* reserved_2 */ NULL,
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(GtkClassInitFunc) NULL
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};
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preview_type = gtk_type_unique (GIMP_TYPE_PREVIEW, &preview_info);
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}
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return preview_type;
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}
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static void
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gimp_drawable_preview_class_init (GimpDrawablePreviewClass *klass)
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{
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GtkObjectClass *object_class;
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GimpPreviewClass *preview_class;
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object_class = (GtkObjectClass *) klass;
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preview_class = (GimpPreviewClass *) klass;
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parent_class = gtk_type_class (GIMP_TYPE_PREVIEW);
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preview_class->render = gimp_drawable_preview_render;
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preview_class->get_size = gimp_drawable_preview_get_size;
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preview_class->create_popup = gimp_drawable_preview_create_popup;
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}
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static void
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gimp_drawable_preview_init (GimpDrawablePreview *preview)
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{
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}
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static void
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gimp_drawable_preview_get_size (GimpPreview *preview,
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gint size,
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gint *width,
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gint *height)
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{
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GimpDrawable *drawable;
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GimpImage *gimage;
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gboolean scaling_up;
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drawable = GIMP_DRAWABLE (preview->viewable);
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gimage = gimp_drawable_gimage (drawable);
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if (gimage && ! preview->is_popup)
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{
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gimp_preview_calc_size (preview,
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gimage->width,
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gimage->height,
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size,
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size,
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gimage->xresolution,
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gimage->yresolution,
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width,
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height,
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&scaling_up);
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}
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else
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{
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gimp_preview_calc_size (preview,
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drawable->width,
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drawable->height,
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size,
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size,
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1.0,
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1.0,
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width,
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height,
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&scaling_up);
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}
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}
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static void
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gimp_drawable_preview_render (GimpPreview *preview)
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{
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GimpDrawable *drawable;
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GimpImage *gimage;
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gint width;
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gint height;
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gint preview_width;
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gint preview_height;
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gboolean scaling_up;
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TempBuf *render_buf;
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drawable = GIMP_DRAWABLE (preview->viewable);
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gimage = gimp_drawable_gimage (drawable);
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width = preview->width;
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height = preview->height;
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if (gimage && ! preview->is_popup)
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{
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width = MAX (1, ROUND ((((gdouble) width / (gdouble) gimage->width) *
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(gdouble) drawable->width)));
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height = MAX (1, ROUND ((((gdouble) height / (gdouble) gimage->height) *
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(gdouble) drawable->height)));
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gimp_preview_calc_size (preview,
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drawable->width,
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drawable->height,
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width,
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height,
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gimage->xresolution,
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gimage->yresolution,
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&preview_width,
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&preview_height,
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&scaling_up);
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}
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else
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{
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gimp_preview_calc_size (preview,
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drawable->width,
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drawable->height,
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width,
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height,
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gimage ? gimage->xresolution : 1.0,
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gimage ? gimage->yresolution : 1.0,
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&preview_width,
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&preview_height,
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&scaling_up);
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}
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if (scaling_up)
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{
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TempBuf *temp_buf;
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temp_buf = gimp_viewable_get_new_preview (preview->viewable,
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drawable->width,
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drawable->height);
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render_buf = temp_buf_scale (temp_buf, preview_width, preview_height);
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temp_buf_free (temp_buf);
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}
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else
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{
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render_buf = gimp_viewable_get_new_preview (preview->viewable,
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preview_width,
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preview_height);
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}
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if (gimage && ! preview->is_popup)
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{
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if (preview_width < preview->width)
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render_buf->x =
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ROUND ((((gdouble) preview->width / (gdouble) gimage->width) *
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(gdouble) drawable->offset_x));
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if (preview_height < preview->height)
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render_buf->y =
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ROUND ((((gdouble) preview->height / (gdouble) gimage->height) *
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(gdouble) drawable->offset_y));
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}
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else
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{
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if (preview_width < width)
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render_buf->x = (width - preview_width) / 2;
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if (preview_height < height)
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render_buf->y = (height - preview_height) / 2;
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}
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if (! gimage && (render_buf->x || render_buf->y))
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{
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TempBuf *temp_buf;
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guchar white[4] = { 0, 0, 0, 0 };
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temp_buf = temp_buf_new (width, height,
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render_buf->bytes,
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0, 0,
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white);
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temp_buf_copy_area (render_buf, temp_buf,
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0, 0,
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render_buf->width,
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render_buf->height,
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render_buf->x,
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render_buf->y);
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temp_buf_free (render_buf);
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gimp_preview_render_and_flush (preview,
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temp_buf,
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-1);
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temp_buf_free (temp_buf);
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return;
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}
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gimp_preview_render_and_flush (preview,
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render_buf,
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-1);
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temp_buf_free (render_buf);
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}
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static GtkWidget *
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gimp_drawable_preview_create_popup (GimpPreview *preview)
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{
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GimpDrawable *drawable;
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GimpImage *gimage;
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gint popup_width;
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gint popup_height;
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gboolean scaling_up;
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drawable = GIMP_DRAWABLE (preview->viewable);
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gimage = gimp_drawable_gimage (drawable);
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gimp_preview_calc_size (preview,
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drawable->width,
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drawable->height,
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MIN (preview->width * 2, 256),
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MIN (preview->height * 2, 256),
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gimage ? gimage->xresolution : 1.0,
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gimage ? gimage->yresolution : 1.0,
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&popup_width,
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&popup_height,
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&scaling_up);
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if (scaling_up)
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{
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return gimp_preview_new_full (preview->viewable,
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drawable->width,
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drawable->height,
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0,
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TRUE, FALSE, FALSE);
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}
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else
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{
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return gimp_preview_new_full (preview->viewable,
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popup_width,
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popup_height,
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0,
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TRUE, FALSE, FALSE);
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}
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}
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