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Diffstat (limited to 'app/core/gimpimage-preview.c')
| -rw-r--r-- | app/core/gimpimage-preview.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/app/core/gimpimage-preview.c b/app/core/gimpimage-preview.c new file mode 100644 index 0000000..e28865e --- /dev/null +++ b/app/core/gimpimage-preview.c @@ -0,0 +1,214 @@ +/* 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 <cairo.h> +#include <gdk-pixbuf/gdk-pixbuf.h> +#include <gegl.h> + +#include "libgimpcolor/gimpcolor.h" + +#include "core-types.h" + +#include "gegl/gimp-babl.h" +#include "gegl/gimp-gegl-loops.h" + +#include "gimpimage.h" +#include "gimpimage-color-profile.h" +#include "gimpimage-preview.h" +#include "gimppickable.h" +#include "gimpprojectable.h" +#include "gimpprojection.h" +#include "gimptempbuf.h" + + +const Babl * +gimp_image_get_preview_format (GimpImage *image) +{ + g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL); + + switch (gimp_image_get_base_type (image)) + { + case GIMP_RGB: + case GIMP_GRAY: + return gimp_babl_format_change_component_type ( + gimp_projectable_get_format (GIMP_PROJECTABLE (image)), + GIMP_COMPONENT_TYPE_U8); + + case GIMP_INDEXED: + return babl_format ("R'G'B'A u8"); + } + + g_return_val_if_reached (NULL); +} + +void +gimp_image_get_preview_size (GimpViewable *viewable, + gint size, + gboolean is_popup, + gboolean dot_for_dot, + gint *width, + gint *height) +{ + GimpImage *image = GIMP_IMAGE (viewable); + gdouble xres; + gdouble yres; + + gimp_image_get_resolution (image, &xres, &yres); + + gimp_viewable_calc_preview_size (gimp_image_get_width (image), + gimp_image_get_height (image), + size, + size, + dot_for_dot, + xres, + yres, + width, + height, + NULL); +} + +gboolean +gimp_image_get_popup_size (GimpViewable *viewable, + gint width, + gint height, + gboolean dot_for_dot, + gint *popup_width, + gint *popup_height) +{ + GimpImage *image = GIMP_IMAGE (viewable); + + if (gimp_image_get_width (image) > width || + gimp_image_get_height (image) > height) + { + gboolean scaling_up; + + gimp_viewable_calc_preview_size (gimp_image_get_width (image), + gimp_image_get_height (image), + width * 2, + height * 2, + dot_for_dot, 1.0, 1.0, + popup_width, + popup_height, + &scaling_up); + + if (scaling_up) + { + *popup_width = gimp_image_get_width (image); + *popup_height = gimp_image_get_height (image); + } + + return TRUE; + } + + return FALSE; +} + +GimpTempBuf * +gimp_image_get_new_preview (GimpViewable *viewable, + GimpContext *context, + gint width, + gint height) +{ + GimpImage *image = GIMP_IMAGE (viewable); + const Babl *format; + GimpTempBuf *buf; + gdouble scale_x; + gdouble scale_y; + + scale_x = (gdouble) width / (gdouble) gimp_image_get_width (image); + scale_y = (gdouble) height / (gdouble) gimp_image_get_height (image); + + format = gimp_image_get_preview_format (image); + + buf = gimp_temp_buf_new (width, height, format); + + gegl_buffer_get (gimp_pickable_get_buffer (GIMP_PICKABLE (image)), + GEGL_RECTANGLE (0, 0, width, height), + MIN (scale_x, scale_y), + gimp_temp_buf_get_format (buf), + gimp_temp_buf_get_data (buf), + GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_CLAMP); + + return buf; +} + +GdkPixbuf * +gimp_image_get_new_pixbuf (GimpViewable *viewable, + GimpContext *context, + gint width, + gint height) +{ + GimpImage *image = GIMP_IMAGE (viewable); + GdkPixbuf *pixbuf; + gdouble scale_x; + gdouble scale_y; + GimpColorTransform *transform; + + scale_x = (gdouble) width / (gdouble) gimp_image_get_width (image); + scale_y = (gdouble) height / (gdouble) gimp_image_get_height (image); + + pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, + width, height); + + transform = gimp_image_get_color_transform_to_srgb_u8 (image); + + if (transform) + { + GimpTempBuf *temp_buf; + GeglBuffer *src_buf; + GeglBuffer *dest_buf; + + temp_buf = gimp_temp_buf_new (width, height, + gimp_pickable_get_format (GIMP_PICKABLE (image))); + + gegl_buffer_get (gimp_pickable_get_buffer (GIMP_PICKABLE (image)), + GEGL_RECTANGLE (0, 0, width, height), + MIN (scale_x, scale_y), + gimp_temp_buf_get_format (temp_buf), + gimp_temp_buf_get_data (temp_buf), + GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_CLAMP); + + src_buf = gimp_temp_buf_create_buffer (temp_buf); + dest_buf = gimp_pixbuf_create_buffer (pixbuf); + + gimp_temp_buf_unref (temp_buf); + + gimp_color_transform_process_buffer (transform, + src_buf, + GEGL_RECTANGLE (0, 0, + width, height), + dest_buf, + GEGL_RECTANGLE (0, 0, 0, 0)); + + g_object_unref (src_buf); + g_object_unref (dest_buf); + } + else + { + gegl_buffer_get (gimp_pickable_get_buffer (GIMP_PICKABLE (image)), + GEGL_RECTANGLE (0, 0, width, height), + MIN (scale_x, scale_y), + gimp_pixbuf_get_format (pixbuf), + gdk_pixbuf_get_pixels (pixbuf), + gdk_pixbuf_get_rowstride (pixbuf), + GEGL_ABYSS_CLAMP); + } + + return pixbuf; +} |