mirror of https://github.com/GNOME/gimp.git
274 lines
8.8 KiB
C
274 lines
8.8 KiB
C
/* GIMP - The GNU 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 3 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, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <string.h>
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#include <cairo.h>
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include <gegl.h>
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#include "libgimpcolor/gimpcolor.h"
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#include "libgimpmath/gimpmath.h"
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#include "core-types.h"
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#include "config/gimpcoreconfig.h"
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#include "gegl/gimp-babl.h"
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#include "gegl/gimp-gegl-loops.h"
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#include "gimp.h"
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#include "gimpchannel.h"
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#include "gimpimage.h"
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#include "gimpimage-color-profile.h"
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#include "gimpdrawable-preview.h"
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#include "gimpdrawable-private.h"
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#include "gimplayer.h"
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#include "gimptempbuf.h"
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/* public functions */
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GimpTempBuf *
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gimp_drawable_get_new_preview (GimpViewable *viewable,
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GimpContext *context,
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gint width,
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gint height)
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{
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GimpItem *item = GIMP_ITEM (viewable);
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GimpImage *image = gimp_item_get_image (item);
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if (! image->gimp->config->layer_previews)
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return NULL;
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return gimp_drawable_get_sub_preview (GIMP_DRAWABLE (viewable),
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0, 0,
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gimp_item_get_width (item),
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gimp_item_get_height (item),
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width,
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height);
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}
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GdkPixbuf *
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gimp_drawable_get_new_pixbuf (GimpViewable *viewable,
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GimpContext *context,
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gint width,
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gint height)
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{
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GimpItem *item = GIMP_ITEM (viewable);
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GimpImage *image = gimp_item_get_image (item);
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if (! image->gimp->config->layer_previews)
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return NULL;
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return gimp_drawable_get_sub_pixbuf (GIMP_DRAWABLE (viewable),
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0, 0,
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gimp_item_get_width (item),
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gimp_item_get_height (item),
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width,
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height);
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}
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const Babl *
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gimp_drawable_get_preview_format (GimpDrawable *drawable)
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{
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gboolean alpha;
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gboolean linear;
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g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
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alpha = gimp_drawable_has_alpha (drawable);
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linear = gimp_drawable_get_linear (drawable);
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switch (gimp_drawable_get_base_type (drawable))
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{
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case GIMP_GRAY:
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return gimp_babl_format (GIMP_GRAY,
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gimp_babl_precision (GIMP_COMPONENT_TYPE_U8,
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linear),
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alpha);
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case GIMP_RGB:
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return gimp_babl_format (GIMP_RGB,
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gimp_babl_precision (GIMP_COMPONENT_TYPE_U8,
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linear),
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alpha);
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case GIMP_INDEXED:
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if (alpha)
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return babl_format ("R'G'B'A u8");
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else
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return babl_format ("R'G'B' u8");
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}
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g_return_val_if_reached (NULL);
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}
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GimpTempBuf *
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gimp_drawable_get_sub_preview (GimpDrawable *drawable,
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gint src_x,
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gint src_y,
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gint src_width,
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gint src_height,
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gint dest_width,
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gint dest_height)
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{
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GimpItem *item;
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GimpImage *image;
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GeglBuffer *buffer;
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GimpTempBuf *preview;
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gdouble scale;
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gint scaled_x;
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gint scaled_y;
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g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
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g_return_val_if_fail (src_x >= 0, NULL);
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g_return_val_if_fail (src_y >= 0, NULL);
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g_return_val_if_fail (src_width > 0, NULL);
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g_return_val_if_fail (src_height > 0, NULL);
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g_return_val_if_fail (dest_width > 0, NULL);
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g_return_val_if_fail (dest_height > 0, NULL);
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item = GIMP_ITEM (drawable);
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g_return_val_if_fail ((src_x + src_width) <= gimp_item_get_width (item), NULL);
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g_return_val_if_fail ((src_y + src_height) <= gimp_item_get_height (item), NULL);
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image = gimp_item_get_image (item);
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if (! image->gimp->config->layer_previews)
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return NULL;
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buffer = gimp_drawable_get_buffer (drawable);
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preview = gimp_temp_buf_new (dest_width, dest_height,
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gimp_drawable_get_preview_format (drawable));
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scale = MIN ((gdouble) dest_width / (gdouble) src_width,
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(gdouble) dest_height / (gdouble) src_height);
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scaled_x = RINT ((gdouble) src_x * scale);
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scaled_y = RINT ((gdouble) src_y * scale);
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gegl_buffer_get (buffer,
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GEGL_RECTANGLE (scaled_x, scaled_y, dest_width, dest_height),
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scale,
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gimp_temp_buf_get_format (preview),
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gimp_temp_buf_get_data (preview),
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GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_CLAMP);
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return preview;
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}
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GdkPixbuf *
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gimp_drawable_get_sub_pixbuf (GimpDrawable *drawable,
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gint src_x,
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gint src_y,
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gint src_width,
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gint src_height,
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gint dest_width,
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gint dest_height)
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{
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GimpItem *item;
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GimpImage *image;
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GeglBuffer *buffer;
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GdkPixbuf *pixbuf;
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gdouble scale;
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gint scaled_x;
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gint scaled_y;
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GimpColorTransform *transform;
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g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
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g_return_val_if_fail (src_x >= 0, NULL);
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g_return_val_if_fail (src_y >= 0, NULL);
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g_return_val_if_fail (src_width > 0, NULL);
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g_return_val_if_fail (src_height > 0, NULL);
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g_return_val_if_fail (dest_width > 0, NULL);
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g_return_val_if_fail (dest_height > 0, NULL);
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item = GIMP_ITEM (drawable);
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g_return_val_if_fail ((src_x + src_width) <= gimp_item_get_width (item), NULL);
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g_return_val_if_fail ((src_y + src_height) <= gimp_item_get_height (item), NULL);
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image = gimp_item_get_image (item);
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if (! image->gimp->config->layer_previews)
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return NULL;
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buffer = gimp_drawable_get_buffer (drawable);
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pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
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dest_width, dest_height);
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scale = MIN ((gdouble) dest_width / (gdouble) src_width,
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(gdouble) dest_height / (gdouble) src_height);
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scaled_x = RINT ((gdouble) src_x * scale);
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scaled_y = RINT ((gdouble) src_y * scale);
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transform = gimp_image_get_color_transform_to_srgb_u8 (image);
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if (transform)
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{
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GimpTempBuf *temp_buf;
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GeglBuffer *src_buf;
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GeglBuffer *dest_buf;
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temp_buf = gimp_temp_buf_new (dest_width, dest_height,
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gimp_drawable_get_format (drawable));
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gegl_buffer_get (buffer,
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GEGL_RECTANGLE (scaled_x, scaled_y,
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dest_width, dest_height),
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scale,
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gimp_temp_buf_get_format (temp_buf),
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gimp_temp_buf_get_data (temp_buf),
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GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_CLAMP);
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src_buf = gimp_temp_buf_create_buffer (temp_buf);
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dest_buf = gimp_pixbuf_create_buffer (pixbuf);
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gimp_temp_buf_unref (temp_buf);
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gimp_color_transform_process_buffer (transform,
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src_buf,
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GEGL_RECTANGLE (0, 0,
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dest_width, dest_height),
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dest_buf,
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GEGL_RECTANGLE (0, 0, 0, 0));
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g_object_unref (src_buf);
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g_object_unref (dest_buf);
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}
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else
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{
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gegl_buffer_get (buffer,
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GEGL_RECTANGLE (scaled_x, scaled_y,
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dest_width, dest_height),
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scale,
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gimp_pixbuf_get_format (pixbuf),
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gdk_pixbuf_get_pixels (pixbuf),
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gdk_pixbuf_get_rowstride (pixbuf),
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GEGL_ABYSS_CLAMP);
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}
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return pixbuf;
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}
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