diff options
Diffstat (limited to 'grub-core/gfxmenu/gui_image.c')
| -rw-r--r-- | grub-core/gfxmenu/gui_image.c | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/grub-core/gfxmenu/gui_image.c b/grub-core/gfxmenu/gui_image.c new file mode 100644 index 0000000..6b2e976 --- /dev/null +++ b/grub-core/gfxmenu/gui_image.c @@ -0,0 +1,270 @@ +/* gui_image.c - GUI component to display an image. */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2008,2009 Free Software Foundation, Inc. + * + * GRUB 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. + * + * GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <grub/mm.h> +#include <grub/misc.h> +#include <grub/gui.h> +#include <grub/gui_string_util.h> +#include <grub/bitmap.h> +#include <grub/bitmap_scale.h> + +struct grub_gui_image +{ + struct grub_gui_component component; + + grub_gui_container_t parent; + grub_video_rect_t bounds; + char *id; + char *theme_dir; + struct grub_video_bitmap *raw_bitmap; + struct grub_video_bitmap *bitmap; +}; + +typedef struct grub_gui_image *grub_gui_image_t; + +static void +image_destroy (void *vself) +{ + grub_gui_image_t self = vself; + + /* Free the scaled bitmap, unless it's a reference to the raw bitmap. */ + if (self->bitmap && (self->bitmap != self->raw_bitmap)) + grub_video_bitmap_destroy (self->bitmap); + if (self->raw_bitmap) + grub_video_bitmap_destroy (self->raw_bitmap); + + grub_free (self); +} + +static const char * +image_get_id (void *vself) +{ + grub_gui_image_t self = vself; + return self->id; +} + +static int +image_is_instance (void *vself __attribute__((unused)), const char *type) +{ + return grub_strcmp (type, "component") == 0; +} + +static void +image_paint (void *vself, const grub_video_rect_t *region) +{ + grub_gui_image_t self = vself; + grub_video_rect_t vpsave; + + if (! self->bitmap) + return; + if (!grub_video_have_common_points (region, &self->bounds)) + return; + + grub_gui_set_viewport (&self->bounds, &vpsave); + grub_video_blit_bitmap (self->bitmap, GRUB_VIDEO_BLIT_BLEND, + 0, 0, 0, 0, + grub_video_bitmap_get_width (self->bitmap), + grub_video_bitmap_get_height (self->bitmap)); + grub_gui_restore_viewport (&vpsave); +} + +static void +image_set_parent (void *vself, grub_gui_container_t parent) +{ + grub_gui_image_t self = vself; + self->parent = parent; +} + +static grub_gui_container_t +image_get_parent (void *vself) +{ + grub_gui_image_t self = vself; + return self->parent; +} + +static grub_err_t +rescale_image (grub_gui_image_t self) +{ + signed width; + signed height; + + if (! self->raw_bitmap) + { + if (self->bitmap) + { + grub_video_bitmap_destroy (self->bitmap); + self->bitmap = 0; + } + return grub_errno; + } + + width = self->bounds.width; + height = self->bounds.height; + + if (self->bitmap + && ((signed) grub_video_bitmap_get_width (self->bitmap) == width) + && ((signed) grub_video_bitmap_get_height (self->bitmap) == height)) + { + /* Nothing to do; already the right size. */ + return grub_errno; + } + + /* Free any old scaled bitmap, + *unless* it's a reference to the raw bitmap. */ + if (self->bitmap && (self->bitmap != self->raw_bitmap)) + grub_video_bitmap_destroy (self->bitmap); + + self->bitmap = 0; + + /* Create a scaled bitmap, unless the requested size is the same + as the raw size -- in that case a reference is made. */ + if ((signed) grub_video_bitmap_get_width (self->raw_bitmap) == width + && (signed) grub_video_bitmap_get_height (self->raw_bitmap) == height) + { + self->bitmap = self->raw_bitmap; + return grub_errno; + } + + /* Don't scale to an invalid size. */ + if (width <= 0 || height <= 0) + return grub_errno; + + /* Create the scaled bitmap. */ + grub_video_bitmap_create_scaled (&self->bitmap, + width, + height, + self->raw_bitmap, + GRUB_VIDEO_BITMAP_SCALE_METHOD_BEST); + return grub_errno; +} + +static void +image_set_bounds (void *vself, const grub_video_rect_t *bounds) +{ + grub_gui_image_t self = vself; + self->bounds = *bounds; + rescale_image (self); +} + +static void +image_get_bounds (void *vself, grub_video_rect_t *bounds) +{ + grub_gui_image_t self = vself; + *bounds = self->bounds; +} + +/* FIXME: inform rendering system it's not forced minimum. */ +static void +image_get_minimal_size (void *vself, unsigned *width, unsigned *height) +{ + grub_gui_image_t self = vself; + + if (self->raw_bitmap) + { + *width = grub_video_bitmap_get_width (self->raw_bitmap); + *height = grub_video_bitmap_get_height (self->raw_bitmap); + } + else + { + *width = 0; + *height = 0; + } +} + +static grub_err_t +load_image (grub_gui_image_t self, const char *path) +{ + struct grub_video_bitmap *bitmap; + if (grub_video_bitmap_load (&bitmap, path) != GRUB_ERR_NONE) + return grub_errno; + + if (self->bitmap && (self->bitmap != self->raw_bitmap)) + { + grub_video_bitmap_destroy (self->bitmap); + self->bitmap = 0; + } + if (self->raw_bitmap) + grub_video_bitmap_destroy (self->raw_bitmap); + + self->raw_bitmap = bitmap; + return rescale_image (self); +} + +static grub_err_t +image_set_property (void *vself, const char *name, const char *value) +{ + grub_gui_image_t self = vself; + if (grub_strcmp (name, "theme_dir") == 0) + { + grub_free (self->theme_dir); + self->theme_dir = grub_strdup (value); + } + else if (grub_strcmp (name, "file") == 0) + { + char *absvalue; + grub_err_t err; + + /* Resolve to an absolute path. */ + if (! self->theme_dir) + return grub_error (GRUB_ERR_BUG, "unspecified theme_dir"); + absvalue = grub_resolve_relative_path (self->theme_dir, value); + if (! absvalue) + return grub_errno; + + err = load_image (self, absvalue); + grub_free (absvalue); + + return err; + } + else if (grub_strcmp (name, "id") == 0) + { + grub_free (self->id); + if (value) + self->id = grub_strdup (value); + else + self->id = 0; + } + return grub_errno; +} + +static struct grub_gui_component_ops image_ops = +{ + .destroy = image_destroy, + .get_id = image_get_id, + .is_instance = image_is_instance, + .paint = image_paint, + .set_parent = image_set_parent, + .get_parent = image_get_parent, + .set_bounds = image_set_bounds, + .get_bounds = image_get_bounds, + .get_minimal_size = image_get_minimal_size, + .set_property = image_set_property +}; + +grub_gui_component_t +grub_gui_image_new (void) +{ + grub_gui_image_t image; + image = grub_zalloc (sizeof (*image)); + if (! image) + return 0; + image->component.ops = &image_ops; + return (grub_gui_component_t) image; +} + |