2N/A/* gui_image.c - GUI component to display an image. */
2N/A/*
2N/A * GRUB -- GRand Unified Bootloader
2N/A * Copyright (C) 2008,2009 Free Software Foundation, Inc.
2N/A *
2N/A * GRUB is free software: you can redistribute it and/or modify
2N/A * it under the terms of the GNU General Public License as published by
2N/A * the Free Software Foundation, either version 3 of the License, or
2N/A * (at your option) any later version.
2N/A *
2N/A * GRUB is distributed in the hope that it will be useful,
2N/A * but WITHOUT ANY WARRANTY; without even the implied warranty of
2N/A * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2N/A * GNU General Public License for more details.
2N/A *
2N/A * You should have received a copy of the GNU General Public License
2N/A * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
2N/A */
2N/A
2N/A#include <grub/mm.h>
2N/A#include <grub/misc.h>
2N/A#include <grub/gui.h>
2N/A#include <grub/gui_string_util.h>
2N/A#include <grub/bitmap.h>
2N/A#include <grub/bitmap_scale.h>
2N/A
2N/Astruct grub_gui_image
2N/A{
2N/A struct grub_gui_component component;
2N/A
2N/A grub_gui_container_t parent;
2N/A grub_video_rect_t bounds;
2N/A char *id;
2N/A char *theme_dir;
2N/A struct grub_video_bitmap *raw_bitmap;
2N/A struct grub_video_bitmap *bitmap;
2N/A};
2N/A
2N/Atypedef struct grub_gui_image *grub_gui_image_t;
2N/A
2N/Astatic void
2N/Aimage_destroy (void *vself)
2N/A{
2N/A grub_gui_image_t self = vself;
2N/A
2N/A /* Free the scaled bitmap, unless it's a reference to the raw bitmap. */
2N/A if (self->bitmap && (self->bitmap != self->raw_bitmap))
2N/A grub_video_bitmap_destroy (self->bitmap);
2N/A if (self->raw_bitmap)
2N/A grub_video_bitmap_destroy (self->raw_bitmap);
2N/A
2N/A grub_free (self);
2N/A}
2N/A
2N/Astatic const char *
2N/Aimage_get_id (void *vself)
2N/A{
2N/A grub_gui_image_t self = vself;
2N/A return self->id;
2N/A}
2N/A
2N/Astatic int
2N/Aimage_is_instance (void *vself __attribute__((unused)), const char *type)
2N/A{
2N/A return grub_strcmp (type, "component") == 0;
2N/A}
2N/A
2N/Astatic void
2N/Aimage_paint (void *vself, const grub_video_rect_t *region)
2N/A{
2N/A grub_gui_image_t self = vself;
2N/A grub_video_rect_t vpsave;
2N/A
2N/A if (! self->bitmap)
2N/A return;
2N/A if (!grub_video_have_common_points (region, &self->bounds))
2N/A return;
2N/A
2N/A grub_gui_set_viewport (&self->bounds, &vpsave);
2N/A grub_video_blit_bitmap (self->bitmap, GRUB_VIDEO_BLIT_BLEND,
2N/A 0, 0, 0, 0,
2N/A grub_video_bitmap_get_width (self->bitmap),
2N/A grub_video_bitmap_get_height (self->bitmap));
2N/A grub_gui_restore_viewport (&vpsave);
2N/A}
2N/A
2N/Astatic void
2N/Aimage_set_parent (void *vself, grub_gui_container_t parent)
2N/A{
2N/A grub_gui_image_t self = vself;
2N/A self->parent = parent;
2N/A}
2N/A
2N/Astatic grub_gui_container_t
2N/Aimage_get_parent (void *vself)
2N/A{
2N/A grub_gui_image_t self = vself;
2N/A return self->parent;
2N/A}
2N/A
2N/Astatic grub_err_t
2N/Arescale_image (grub_gui_image_t self)
2N/A{
2N/A signed width;
2N/A signed height;
2N/A
2N/A if (! self->raw_bitmap)
2N/A {
2N/A if (self->bitmap)
2N/A {
2N/A grub_video_bitmap_destroy (self->bitmap);
2N/A self->bitmap = 0;
2N/A }
2N/A return grub_errno;
2N/A }
2N/A
2N/A width = self->bounds.width;
2N/A height = self->bounds.height;
2N/A
2N/A if (self->bitmap
2N/A && ((signed) grub_video_bitmap_get_width (self->bitmap) == width)
2N/A && ((signed) grub_video_bitmap_get_height (self->bitmap) == height))
2N/A {
2N/A /* Nothing to do; already the right size. */
2N/A return grub_errno;
2N/A }
2N/A
2N/A /* Free any old scaled bitmap,
2N/A *unless* it's a reference to the raw bitmap. */
2N/A if (self->bitmap && (self->bitmap != self->raw_bitmap))
2N/A grub_video_bitmap_destroy (self->bitmap);
2N/A
2N/A self->bitmap = 0;
2N/A
2N/A /* Create a scaled bitmap, unless the requested size is the same
2N/A as the raw size -- in that case a reference is made. */
2N/A if ((signed) grub_video_bitmap_get_width (self->raw_bitmap) == width
2N/A && (signed) grub_video_bitmap_get_height (self->raw_bitmap) == height)
2N/A {
2N/A self->bitmap = self->raw_bitmap;
2N/A return grub_errno;
2N/A }
2N/A
2N/A /* Don't scale to an invalid size. */
2N/A if (width <= 0 || height <= 0)
2N/A return grub_errno;
2N/A
2N/A /* Create the scaled bitmap. */
2N/A grub_video_bitmap_create_scaled (&self->bitmap,
2N/A width,
2N/A height,
2N/A self->raw_bitmap,
2N/A GRUB_VIDEO_BITMAP_SCALE_METHOD_BEST);
2N/A if (grub_errno != GRUB_ERR_NONE)
2N/A {
2N/A grub_error_push ();
2N/A grub_error (grub_errno, "failed to scale bitmap for image component");
2N/A }
2N/A return grub_errno;
2N/A}
2N/A
2N/Astatic void
2N/Aimage_set_bounds (void *vself, const grub_video_rect_t *bounds)
2N/A{
2N/A grub_gui_image_t self = vself;
2N/A self->bounds = *bounds;
2N/A rescale_image (self);
2N/A}
2N/A
2N/Astatic void
2N/Aimage_get_bounds (void *vself, grub_video_rect_t *bounds)
2N/A{
2N/A grub_gui_image_t self = vself;
2N/A *bounds = self->bounds;
2N/A}
2N/A
2N/A/* FIXME: inform rendering system it's not forced minimum. */
2N/Astatic void
2N/Aimage_get_minimal_size (void *vself, unsigned *width, unsigned *height)
2N/A{
2N/A grub_gui_image_t self = vself;
2N/A
2N/A if (self->raw_bitmap)
2N/A {
2N/A *width = grub_video_bitmap_get_width (self->raw_bitmap);
2N/A *height = grub_video_bitmap_get_height (self->raw_bitmap);
2N/A }
2N/A else
2N/A {
2N/A *width = 0;
2N/A *height = 0;
2N/A }
2N/A}
2N/A
2N/Astatic grub_err_t
2N/Aload_image (grub_gui_image_t self, const char *path)
2N/A{
2N/A struct grub_video_bitmap *bitmap;
2N/A if (grub_video_bitmap_load (&bitmap, path) != GRUB_ERR_NONE)
2N/A return grub_errno;
2N/A
2N/A if (self->bitmap && (self->bitmap != self->raw_bitmap))
2N/A grub_video_bitmap_destroy (self->bitmap);
2N/A if (self->raw_bitmap)
2N/A grub_video_bitmap_destroy (self->raw_bitmap);
2N/A
2N/A self->raw_bitmap = bitmap;
2N/A return rescale_image (self);
2N/A}
2N/A
2N/Astatic grub_err_t
2N/Aimage_set_property (void *vself, const char *name, const char *value)
2N/A{
2N/A grub_gui_image_t self = vself;
2N/A if (grub_strcmp (name, "theme_dir") == 0)
2N/A {
2N/A grub_free (self->theme_dir);
2N/A self->theme_dir = grub_strdup (value);
2N/A }
2N/A else if (grub_strcmp (name, "file") == 0)
2N/A {
2N/A char *absvalue;
2N/A grub_err_t err;
2N/A
2N/A /* Resolve to an absolute path. */
2N/A if (! self->theme_dir)
2N/A return grub_error (GRUB_ERR_BAD_ARGUMENT, "unspecified theme_dir");
2N/A absvalue = grub_resolve_relative_path (self->theme_dir, value);
2N/A if (! absvalue)
2N/A return grub_errno;
2N/A
2N/A err = load_image (self, absvalue);
2N/A grub_free (absvalue);
2N/A
2N/A return err;
2N/A }
2N/A else if (grub_strcmp (name, "id") == 0)
2N/A {
2N/A grub_free (self->id);
2N/A if (value)
2N/A self->id = grub_strdup (value);
2N/A else
2N/A self->id = 0;
2N/A }
2N/A return grub_errno;
2N/A}
2N/A
2N/Astatic struct grub_gui_component_ops image_ops =
2N/A{
2N/A .destroy = image_destroy,
2N/A .get_id = image_get_id,
2N/A .is_instance = image_is_instance,
2N/A .paint = image_paint,
2N/A .set_parent = image_set_parent,
2N/A .get_parent = image_get_parent,
2N/A .set_bounds = image_set_bounds,
2N/A .get_bounds = image_get_bounds,
2N/A .get_minimal_size = image_get_minimal_size,
2N/A .set_property = image_set_property
2N/A};
2N/A
2N/Agrub_gui_component_t
2N/Agrub_gui_image_new (void)
2N/A{
2N/A grub_gui_image_t image;
2N/A image = grub_zalloc (sizeof (*image));
2N/A if (! image)
2N/A return 0;
2N/A image->component.ops = &image_ops;
2N/A return (grub_gui_component_t) image;
2N/A}
2N/A