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* grub-core/gfxmenu/theme_loader.c: New global options for the 

theme background image handling. desktop-image-scale-method,
       desktop-image-h-align, desktop-image-v-align.
       * grub-core/gfxmenu/view.c: Likewise.
       * include/gfxmenu_view.h: Likewise.
       * include/bitmap_scale.h: Proportional scale functions introduced.
       * grub-core/video/bitmap_scale.c: Likewise. Verification checks are
       put in a separate functions. GRUB_ERR_BUG is set for grub_error in
       cases of unexpected input variables for scale functions.
       * docs/grub.texi: Updated documentation for new options.
This commit is contained in:
Vladimir Testov 2013-10-02 18:17:33 +04:00
parent c573914389
commit ebc1da55cd
7 changed files with 417 additions and 107 deletions
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13
ChangeLog
View File

@ -1,3 +1,16 @@
2013-10-02 Vladimir Testov <vladimir.testov@rosalab.ru>
* grub-core/gfxmenu/theme_loader.c: New global options for the
theme background image handling. desktop-image-scale-method,
desktop-image-h-align, desktop-image-v-align.
* grub-core/gfxmenu/view.c: Likewise.
* include/gfxmenu_view.h: Likewise.
* include/bitmap_scale.h: Proportional scale functions introduced.
* grub-core/video/bitmap_scale.c: Likewise. Verification checks are
put in a separate functions. GRUB_ERR_BUG is set for grub_error in
cases of unexpected input variables for scale functions.
* docs/grub.texi: Updated documentation for new options.
2013-10-02 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/video/readers/png.c: Support narrow (4-/2-/1-bpp) PNG.

23
docs/grub.texi
View File

@ -1907,7 +1907,28 @@ In this example, name3 is assigned a color value.
@item message-font @tab Defines the font used for messages, such as when GRUB is unable to automatically boot an entry.
@item message-color @tab Defines the color of the message text.
@item message-bg-color @tab Defines the background color of the message text area.
@item desktop-image @tab Specifies the image to use as the background. It will be scaled to fit the screen size.
@item desktop-image
@tab Specifies the image to use as the background. It will be scaled
to fit the screen size or proportionally scaled depending on the scale
method.
@item desktop-image-scale-method
@tab Specifies the scaling method for the *desktop-image*. Options are
``stretch``, ``crop``, ``padding``, ``fitwidth``, ``fitheight``.
``stretch`` for fitting the screen size. Otherwise it is proportional
scaling of a part of *desktop-image* to the part of the screen.
``crop`` part of the *desktop-image* will be proportionally scaled to
fit the screen sizes. ``padding`` the entire *desktop-image* will be
contained on the screen. ``fitwidth`` for fitting the *desktop-image*'s
width with screen width. ``fitheight`` for fitting the *desktop-image*'s
height with the screen height. Default is ``stretch``.
@item desktop-image-h-align
@tab Specifies the horizontal alignment of the *desktop-image* if
*desktop-image-scale-method* isn't equeal to ``stretch``. Options are
``left``, ``center``, ``right``. Default is ``center``.
@item desktop-image-v-align
@tab Specifies the vertical alignment of the *desktop-image* if
*desktop-image-scale-method* isn't equeal to ``stretch``. Options are
``top``, ``center``, ``bottom``. Default is ``center``.
@item desktop-color @tab Specifies the color for the background if *desktop-image* is not specified.
@item terminal-box @tab Specifies the file name pattern for the styled box slices used for the command line terminal window. For example, ``terminal-box: terminal_*.png'' will use the images ``terminal_c.png`` as the center area, ``terminal_n.png`` as the north (top) edge, ``terminal_nw.png`` as the northwest (upper left) corner, and so on. If the image for any slice is not found, it will simply be left empty.
@item terminal-border @tab Specifies the border width of the terminal window.

65
grub-core/gfxmenu/theme_loader.c
View File

@ -165,7 +165,6 @@ theme_set_string (grub_gfxmenu_view_t view,
else if (! grub_strcmp ("desktop-image", name))
{
struct grub_video_bitmap *raw_bitmap;
struct grub_video_bitmap *scaled_bitmap;
char *path;
path = grub_resolve_relative_path (theme_dir, value);
if (! path)
@ -176,20 +175,56 @@ theme_set_string (grub_gfxmenu_view_t view,
return grub_errno;
}
grub_free(path);
grub_video_bitmap_create_scaled (&scaled_bitmap,
view->screen.width,
view->screen.height,
raw_bitmap,
GRUB_VIDEO_BITMAP_SCALE_METHOD_BEST);
grub_video_bitmap_destroy (raw_bitmap);
if (! scaled_bitmap)
{
grub_error_push ();
return grub_error (grub_errno, "error scaling desktop image");
}
grub_video_bitmap_destroy (view->desktop_image);
view->desktop_image = scaled_bitmap;
grub_video_bitmap_destroy (view->raw_desktop_image);
view->raw_desktop_image = raw_bitmap;
}
else if (! grub_strcmp ("desktop-image-scale-method", name))
{
if (! value || ! grub_strcmp ("stretch", value))
view->desktop_image_scale_method =
GRUB_VIDEO_BITMAP_SELECTION_METHOD_STRETCH;
else if (! grub_strcmp ("crop", value))
view->desktop_image_scale_method =
GRUB_VIDEO_BITMAP_SELECTION_METHOD_CROP;
else if (! grub_strcmp ("padding", value))
view->desktop_image_scale_method =
GRUB_VIDEO_BITMAP_SELECTION_METHOD_PADDING;
else if (! grub_strcmp ("fitwidth", value))
view->desktop_image_scale_method =
GRUB_VIDEO_BITMAP_SELECTION_METHOD_FITWIDTH;
else if (! grub_strcmp ("fitheight", value))
view->desktop_image_scale_method =
GRUB_VIDEO_BITMAP_SELECTION_METHOD_FITHEIGHT;
else
return grub_error (GRUB_ERR_BAD_ARGUMENT,
_("Unsupported scale method: %s"),
grub_strdup (value));
}
else if (! grub_strcmp ("desktop-image-h-align", name))
{
if (! grub_strcmp ("left", value))
view->desktop_image_h_align = GRUB_VIDEO_BITMAP_H_ALIGN_LEFT;
else if (! grub_strcmp ("center", value))
view->desktop_image_h_align = GRUB_VIDEO_BITMAP_H_ALIGN_CENTER;
else if (! grub_strcmp ("right", value))
view->desktop_image_h_align = GRUB_VIDEO_BITMAP_H_ALIGN_RIGHT;
else
return grub_error (GRUB_ERR_BAD_ARGUMENT,
_("Unsupported horizontal align method: %s"),
grub_strdup (value));
}
else if (! grub_strcmp ("desktop-image-v-align", name))
{
if (! grub_strcmp ("top", value))
view->desktop_image_v_align = GRUB_VIDEO_BITMAP_V_ALIGN_TOP;
else if (! grub_strcmp ("center", value))
view->desktop_image_v_align = GRUB_VIDEO_BITMAP_V_ALIGN_CENTER;
else if (! grub_strcmp ("bottom", value))
view->desktop_image_v_align = GRUB_VIDEO_BITMAP_V_ALIGN_BOTTOM;
else
return grub_error (GRUB_ERR_BAD_ARGUMENT,
_("Unsupported vertical align method: %s"),
grub_strdup (value));
}
else if (! grub_strcmp ("desktop-color", name))
grub_video_parse_color (value, &view->desktop_color);

46
grub-core/gfxmenu/view.c
View File

@ -40,6 +40,8 @@
static void
init_terminal (grub_gfxmenu_view_t view);
static void
init_background (grub_gfxmenu_view_t view);
static grub_gfxmenu_view_t term_view;
/* Create a new view object, loading the theme specified by THEME_PATH and
@ -91,7 +93,11 @@ grub_gfxmenu_view_new (const char *theme_path,
view->title_color = default_fg_color;
view->message_color = default_bg_color;
view->message_bg_color = default_fg_color;
view->desktop_image = 0;
view->raw_desktop_image = 0;
view->scaled_desktop_image = 0;
view->desktop_image_scale_method = GRUB_VIDEO_BITMAP_SELECTION_METHOD_STRETCH;
view->desktop_image_h_align = GRUB_VIDEO_BITMAP_H_ALIGN_CENTER;
view->desktop_image_v_align = GRUB_VIDEO_BITMAP_V_ALIGN_CENTER;
view->desktop_color = default_bg_color;
view->terminal_box = grub_gfxmenu_create_box (0, 0);
view->title_text = grub_strdup (_("GRUB Boot Menu"));
@ -128,7 +134,8 @@ grub_gfxmenu_view_destroy (grub_gfxmenu_view_t view)
grub_gfxmenu_timeout_notifications = grub_gfxmenu_timeout_notifications->next;
grub_free (p);
}
grub_video_bitmap_destroy (view->desktop_image);
grub_video_bitmap_destroy (view->raw_desktop_image);
grub_video_bitmap_destroy (view->scaled_desktop_image);
if (view->terminal_box)
view->terminal_box->destroy (view->terminal_box);
grub_free (view->terminal_font_name);
@ -144,9 +151,9 @@ static void
redraw_background (grub_gfxmenu_view_t view,
const grub_video_rect_t *bounds)
{
if (view->desktop_image)
if (view->scaled_desktop_image)
{
struct grub_video_bitmap *img = view->desktop_image;
struct grub_video_bitmap *img = view->scaled_desktop_image;
grub_video_blit_bitmap (img, GRUB_VIDEO_BLIT_REPLACE,
bounds->x, bounds->y,
bounds->x - view->screen.x,
@ -328,6 +335,8 @@ grub_gfxmenu_view_draw (grub_gfxmenu_view_t view)
{
init_terminal (view);
init_background (view);
/* Clear the screen; there may be garbage left over in video memory. */
grub_video_fill_rect (grub_video_map_rgb (0, 0, 0),
view->screen.x, view->screen.y,
@ -524,6 +533,35 @@ init_terminal (grub_gfxmenu_view_t view)
grub_gfxterm_decorator_hook = grub_gfxmenu_draw_terminal_box;
}
static void
init_background (grub_gfxmenu_view_t view)
{
if (view->scaled_desktop_image)
return;
struct grub_video_bitmap *scaled_bitmap;
if (view->desktop_image_scale_method ==
GRUB_VIDEO_BITMAP_SELECTION_METHOD_STRETCH)
grub_video_bitmap_create_scaled (&scaled_bitmap,
view->screen.width,
view->screen.height,
view->raw_desktop_image,
GRUB_VIDEO_BITMAP_SCALE_METHOD_BEST);
else
grub_video_bitmap_scale_proportional (&scaled_bitmap,
view->screen.width,
view->screen.height,
view->raw_desktop_image,
GRUB_VIDEO_BITMAP_SCALE_METHOD_BEST,
view->desktop_image_scale_method,
view->desktop_image_v_align,
view->desktop_image_h_align);
if (! scaled_bitmap)
return;
view->scaled_desktop_image = scaled_bitmap;
}
/* FIXME: previously notifications were displayed in special case.
Is it necessary?
*/

334
grub-core/video/bitmap_scale.c
View File

@ -33,6 +33,46 @@ static grub_err_t scale_nn (struct grub_video_bitmap *dst,
static grub_err_t scale_bilinear (struct grub_video_bitmap *dst,
struct grub_video_bitmap *src);
static grub_err_t
verify_source_bitmap (struct grub_video_bitmap *src)
{
/* Verify the simplifying assumptions. */
if (src == 0)
return grub_error (GRUB_ERR_BUG,
"null src bitmap in grub_video_bitmap_create_scaled");
if (src->mode_info.red_field_pos % 8 != 0
|| src->mode_info.green_field_pos % 8 != 0
|| src->mode_info.blue_field_pos % 8 != 0
|| src->mode_info.reserved_field_pos % 8 != 0)
return grub_error (GRUB_ERR_BUG,
"src format not supported for scale");
if (src->mode_info.width == 0 || src->mode_info.height == 0)
return grub_error (GRUB_ERR_BUG,
"source bitmap has a zero dimension");
if (src->mode_info.bytes_per_pixel * 8 != src->mode_info.bpp)
return grub_error (GRUB_ERR_BUG,
"bitmap to scale has inconsistent Bpp and bpp");
return GRUB_ERR_NONE;
}
static grub_err_t
grub_video_bitmap_scale (struct grub_video_bitmap *dst,
struct grub_video_bitmap *src,
enum grub_video_bitmap_scale_method scale_method)
{
switch (scale_method)
{
case GRUB_VIDEO_BITMAP_SCALE_METHOD_FASTEST:
case GRUB_VIDEO_BITMAP_SCALE_METHOD_NEAREST:
return scale_nn (dst, src);
case GRUB_VIDEO_BITMAP_SCALE_METHOD_BEST:
case GRUB_VIDEO_BITMAP_SCALE_METHOD_BILINEAR:
return scale_bilinear (dst, src);
default:
return grub_error (GRUB_ERR_BUG, "Invalid scale_method value");
}
}
/* This function creates a new scaled version of the bitmap SRC. The new
bitmap has dimensions DST_WIDTH by DST_HEIGHT. The scaling algorithm
is given by SCALE_METHOD. If an error is encountered, the return code is
@ -52,25 +92,12 @@ grub_video_bitmap_create_scaled (struct grub_video_bitmap **dst,
{
*dst = 0;
/* Verify the simplifying assumptions. */
if (src == 0)
return grub_error (GRUB_ERR_BUG,
"null src bitmap in grub_video_bitmap_create_scaled");
if (src->mode_info.red_field_pos % 8 != 0
|| src->mode_info.green_field_pos % 8 != 0
|| src->mode_info.blue_field_pos % 8 != 0
|| src->mode_info.reserved_field_pos % 8 != 0)
return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
"src format not supported for scale");
if (src->mode_info.width == 0 || src->mode_info.height == 0)
return grub_error (GRUB_ERR_BAD_ARGUMENT,
"source bitmap has a zero dimension");
grub_err_t err = verify_source_bitmap(src);
if (err != GRUB_ERR_NONE)
return err;
if (dst_width <= 0 || dst_height <= 0)
return grub_error (GRUB_ERR_BUG,
"requested to scale to a size w/ a zero dimension");
if (src->mode_info.bytes_per_pixel * 8 != src->mode_info.bpp)
return grub_error (GRUB_ERR_BUG,
"bitmap to scale has inconsistent Bpp and bpp");
/* Create the new bitmap. */
grub_err_t ret;
@ -79,20 +106,171 @@ grub_video_bitmap_create_scaled (struct grub_video_bitmap **dst,
if (ret != GRUB_ERR_NONE)
return ret; /* Error. */
switch (scale_method)
ret = grub_video_bitmap_scale (*dst, src, scale_method);
if (ret == GRUB_ERR_NONE)
{
case GRUB_VIDEO_BITMAP_SCALE_METHOD_FASTEST:
case GRUB_VIDEO_BITMAP_SCALE_METHOD_NEAREST:
ret = scale_nn (*dst, src);
/* Success: *dst is now a pointer to the scaled bitmap. */
return GRUB_ERR_NONE;
}
else
{
/* Destroy the bitmap and return the error code. */
grub_video_bitmap_destroy (*dst);
*dst = 0;
return ret;
}
}
static grub_err_t
make_h_align (int *x, int *w, int new_w,
grub_video_bitmap_h_align_t h_align)
{
grub_err_t ret = GRUB_ERR_NONE;
switch (h_align)
{
case GRUB_VIDEO_BITMAP_H_ALIGN_LEFT:
*x = 0;
break;
case GRUB_VIDEO_BITMAP_SCALE_METHOD_BEST:
case GRUB_VIDEO_BITMAP_SCALE_METHOD_BILINEAR:
ret = scale_bilinear (*dst, src);
case GRUB_VIDEO_BITMAP_H_ALIGN_CENTER:
*x = (*w - new_w) / 2;
break;
case GRUB_VIDEO_BITMAP_H_ALIGN_RIGHT:
*x = *w - new_w;
break;
default:
ret = grub_error (GRUB_ERR_BUG, "Invalid scale_method value");
ret = grub_error (GRUB_ERR_BUG, "Invalid h_align value");
break;
}
*w = new_w;
return ret;
}
static grub_err_t
make_v_align (int *y, int *h, int new_h,
grub_video_bitmap_v_align_t v_align)
{
grub_err_t ret = GRUB_ERR_NONE;
switch (v_align)
{
case GRUB_VIDEO_BITMAP_V_ALIGN_TOP:
*y = 0;
break;
case GRUB_VIDEO_BITMAP_V_ALIGN_CENTER:
*y = (*h - new_h) / 2;
break;
case GRUB_VIDEO_BITMAP_V_ALIGN_BOTTOM:
*y = *h - new_h;
break;
default:
ret = grub_error (GRUB_ERR_BUG, "Invalid v_align value");
break;
}
*h = new_h;
return ret;
}
grub_err_t
grub_video_bitmap_scale_proportional (struct grub_video_bitmap **dst,
int dst_width, int dst_height,
struct grub_video_bitmap *src,
enum grub_video_bitmap_scale_method
scale_method,
grub_video_bitmap_selection_method_t
selection_method,
grub_video_bitmap_v_align_t v_align,
grub_video_bitmap_h_align_t h_align)
{
*dst = 0;
grub_err_t ret = verify_source_bitmap(src);
if (ret != GRUB_ERR_NONE)
return ret;
if (dst_width <= 0 || dst_height <= 0)
return grub_error (GRUB_ERR_BUG,
"requested to scale to a size w/ a zero dimension");
ret = grub_video_bitmap_create (dst, dst_width, dst_height,
src->mode_info.blit_format);
if (ret != GRUB_ERR_NONE)
return ret; /* Error. */
int dx0 = 0;
int dy0 = 0;
int dw = dst_width;
int dh = dst_height;
int sx0 = 0;
int sy0 = 0;
int sw = src->mode_info.width;
int sh = src->mode_info.height;
switch (selection_method)
{
case GRUB_VIDEO_BITMAP_SELECTION_METHOD_CROP:
/* Comparing sw/sh VS dw/dh. */
if (sw * dh < dw * sh)
ret = make_v_align (&sy0, &sh, sw * dh / dw, v_align);
else
ret = make_h_align (&sx0, &sw, sh * dw / dh, h_align);
break;
case GRUB_VIDEO_BITMAP_SELECTION_METHOD_PADDING:
if (sw * dh < dw * sh)
ret = make_h_align (&dx0, &dw, sw * dh / sh, h_align);
else
ret = make_v_align (&dy0, &dh, sh * dw / sw, v_align);
break;
case GRUB_VIDEO_BITMAP_SELECTION_METHOD_FITWIDTH:
if (sw * dh < dw * sh)
ret = make_v_align (&sy0, &sh, sw * dh / dw, v_align);
else
ret = make_v_align (&dy0, &dh, sh * dw / sw, v_align);
break;
case GRUB_VIDEO_BITMAP_SELECTION_METHOD_FITHEIGHT:
if (sw * dh < dw * sh)
ret = make_h_align (&dx0, &dw, sw * dh / sh, h_align);
else
ret = make_h_align (&sx0, &sw, sh * dw / dh, h_align);
break;
default:
ret = grub_error (GRUB_ERR_BUG, "Invalid selection_method value");
break;
}
if (ret == GRUB_ERR_NONE)
{
/* Backup original data. */
int src_width_orig = src->mode_info.width;
int src_height_orig = src->mode_info.height;
grub_uint8_t *src_data_orig = src->data;
int dst_width_orig = (*dst)->mode_info.width;
int dst_height_orig = (*dst)->mode_info.height;
grub_uint8_t *dst_data_orig = (*dst)->data;
int dstride = (*dst)->mode_info.pitch;
int sstride = src->mode_info.pitch;
/* bytes_per_pixel is the same for both src and dst. */
int bytes_per_pixel = src->mode_info.bytes_per_pixel;
/* Crop src and dst. */
src->mode_info.width = sw;
src->mode_info.height = sh;
src->data = (grub_uint8_t *) src->data + sx0 * bytes_per_pixel
+ sy0 * sstride;
(*dst)->mode_info.width = dw;
(*dst)->mode_info.height = dh;
(*dst)->data = (grub_uint8_t *) (*dst)->data + dx0 * bytes_per_pixel
+ dy0 * dstride;
/* Scale our image. */
ret = grub_video_bitmap_scale (*dst, src, scale_method);
/* Restore original data. */
src->mode_info.width = src_width_orig;
src->mode_info.height = src_height_orig;
src->data = src_data_orig;
(*dst)->mode_info.width = dst_width_orig;
(*dst)->mode_info.height = dst_height_orig;
(*dst)->data = dst_data_orig;
}
if (ret == GRUB_ERR_NONE)
{
@ -108,6 +286,46 @@ grub_video_bitmap_create_scaled (struct grub_video_bitmap **dst,
}
}
static grub_err_t
verify_bitmaps (struct grub_video_bitmap *dst, struct grub_video_bitmap *src)
{
/* Verify the simplifying assumptions. */
if (dst == 0 || src == 0)
return grub_error (GRUB_ERR_BUG, "null bitmap in scale function");
if (dst->mode_info.red_field_pos % 8 != 0
|| dst->mode_info.green_field_pos % 8 != 0
|| dst->mode_info.blue_field_pos % 8 != 0
|| dst->mode_info.reserved_field_pos % 8 != 0)
return grub_error (GRUB_ERR_BUG,
"dst format not supported");
if (src->mode_info.red_field_pos % 8 != 0
|| src->mode_info.green_field_pos % 8 != 0
|| src->mode_info.blue_field_pos % 8 != 0
|| src->mode_info.reserved_field_pos % 8 != 0)
return grub_error (GRUB_ERR_BUG,
"src format not supported");
if (dst->mode_info.red_field_pos != src->mode_info.red_field_pos
|| dst->mode_info.red_mask_size != src->mode_info.red_mask_size
|| dst->mode_info.green_field_pos != src->mode_info.green_field_pos
|| dst->mode_info.green_mask_size != src->mode_info.green_mask_size
|| dst->mode_info.blue_field_pos != src->mode_info.blue_field_pos
|| dst->mode_info.blue_mask_size != src->mode_info.blue_mask_size
|| dst->mode_info.reserved_field_pos !=
src->mode_info.reserved_field_pos
|| dst->mode_info.reserved_mask_size !=
src->mode_info.reserved_mask_size)
return grub_error (GRUB_ERR_BUG,
"dst and src not compatible");
if (dst->mode_info.bytes_per_pixel != src->mode_info.bytes_per_pixel)
return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
"dst and src not compatible");
if (dst->mode_info.width == 0 || dst->mode_info.height == 0
|| src->mode_info.width == 0 || src->mode_info.height == 0)
return grub_error (GRUB_ERR_BUG, "bitmap has a zero dimension");
return GRUB_ERR_NONE;
}
/* Nearest neighbor bitmap scaling algorithm.
Copy the bitmap SRC to the bitmap DST, scaling the bitmap to fit the
@ -121,39 +339,9 @@ grub_video_bitmap_create_scaled (struct grub_video_bitmap **dst,
static grub_err_t
scale_nn (struct grub_video_bitmap *dst, struct grub_video_bitmap *src)
{
/* Verify the simplifying assumptions. */
if (dst == 0 || src == 0)
return grub_error (GRUB_ERR_BUG, "null bitmap in scale_nn");
if (dst->mode_info.red_field_pos % 8 != 0
|| dst->mode_info.green_field_pos % 8 != 0
|| dst->mode_info.blue_field_pos % 8 != 0
|| dst->mode_info.reserved_field_pos % 8 != 0)
return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
"dst format not supported");
if (src->mode_info.red_field_pos % 8 != 0
|| src->mode_info.green_field_pos % 8 != 0
|| src->mode_info.blue_field_pos % 8 != 0
|| src->mode_info.reserved_field_pos % 8 != 0)
return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
"src format not supported");
if (dst->mode_info.red_field_pos != src->mode_info.red_field_pos
|| dst->mode_info.red_mask_size != src->mode_info.red_mask_size
|| dst->mode_info.green_field_pos != src->mode_info.green_field_pos
|| dst->mode_info.green_mask_size != src->mode_info.green_mask_size
|| dst->mode_info.blue_field_pos != src->mode_info.blue_field_pos
|| dst->mode_info.blue_mask_size != src->mode_info.blue_mask_size
|| dst->mode_info.reserved_field_pos !=
src->mode_info.reserved_field_pos
|| dst->mode_info.reserved_mask_size !=
src->mode_info.reserved_mask_size)
return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
"dst and src not compatible");
if (dst->mode_info.bytes_per_pixel != src->mode_info.bytes_per_pixel)
return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
"dst and src not compatible");
if (dst->mode_info.width == 0 || dst->mode_info.height == 0
|| src->mode_info.width == 0 || src->mode_info.height == 0)
return grub_error (GRUB_ERR_BUG, "bitmap has a zero dimension");
grub_err_t err = verify_bitmaps(dst, src);
if (err != GRUB_ERR_NONE)
return err;
grub_uint8_t *ddata = dst->data;
grub_uint8_t *sdata = src->data;
@ -208,35 +396,9 @@ scale_nn (struct grub_video_bitmap *dst, struct grub_video_bitmap *src)
static grub_err_t
scale_bilinear (struct grub_video_bitmap *dst, struct grub_video_bitmap *src)
{
/* Verify the simplifying assumptions. */
if (dst == 0 || src == 0)
return grub_error (GRUB_ERR_BUG, "null bitmap in scale func");
if (dst->mode_info.red_field_pos % 8 != 0
|| dst->mode_info.green_field_pos % 8 != 0
|| dst->mode_info.blue_field_pos % 8 != 0
|| dst->mode_info.reserved_field_pos % 8 != 0)
return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET, "dst format not supported");
if (src->mode_info.red_field_pos % 8 != 0
|| src->mode_info.green_field_pos % 8 != 0
|| src->mode_info.blue_field_pos % 8 != 0
|| src->mode_info.reserved_field_pos % 8 != 0)
return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET, "src format not supported");
if (dst->mode_info.red_field_pos != src->mode_info.red_field_pos
|| dst->mode_info.red_mask_size != src->mode_info.red_mask_size
|| dst->mode_info.green_field_pos != src->mode_info.green_field_pos
|| dst->mode_info.green_mask_size != src->mode_info.green_mask_size
|| dst->mode_info.blue_field_pos != src->mode_info.blue_field_pos
|| dst->mode_info.blue_mask_size != src->mode_info.blue_mask_size
|| dst->mode_info.reserved_field_pos !=
src->mode_info.reserved_field_pos
|| dst->mode_info.reserved_mask_size !=
src->mode_info.reserved_mask_size)
return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET, "dst and src not compatible");
if (dst->mode_info.bytes_per_pixel != src->mode_info.bytes_per_pixel)
return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET, "dst and src not compatible");
if (dst->mode_info.width == 0 || dst->mode_info.height == 0
|| src->mode_info.width == 0 || src->mode_info.height == 0)
return grub_error (GRUB_ERR_BUG, "bitmap has a zero dimension");
grub_err_t err = verify_bitmaps(dst, src);
if (err != GRUB_ERR_NONE)
return err;
grub_uint8_t *ddata = dst->data;
grub_uint8_t *sdata = src->data;

36
include/grub/bitmap_scale.h
View File

@ -38,6 +38,29 @@ enum grub_video_bitmap_scale_method
GRUB_VIDEO_BITMAP_SCALE_METHOD_BILINEAR
};
typedef enum grub_video_bitmap_selection_method
{
GRUB_VIDEO_BITMAP_SELECTION_METHOD_STRETCH,
GRUB_VIDEO_BITMAP_SELECTION_METHOD_CROP,
GRUB_VIDEO_BITMAP_SELECTION_METHOD_PADDING,
GRUB_VIDEO_BITMAP_SELECTION_METHOD_FITWIDTH,
GRUB_VIDEO_BITMAP_SELECTION_METHOD_FITHEIGHT
} grub_video_bitmap_selection_method_t;
typedef enum grub_video_bitmap_v_align
{
GRUB_VIDEO_BITMAP_V_ALIGN_TOP,
GRUB_VIDEO_BITMAP_V_ALIGN_CENTER,
GRUB_VIDEO_BITMAP_V_ALIGN_BOTTOM
} grub_video_bitmap_v_align_t;
typedef enum grub_video_bitmap_h_align
{
GRUB_VIDEO_BITMAP_H_ALIGN_LEFT,
GRUB_VIDEO_BITMAP_H_ALIGN_CENTER,
GRUB_VIDEO_BITMAP_H_ALIGN_RIGHT
} grub_video_bitmap_h_align_t;
grub_err_t
EXPORT_FUNC (grub_video_bitmap_create_scaled) (struct grub_video_bitmap **dst,
int dst_width, int dst_height,
@ -46,4 +69,17 @@ EXPORT_FUNC (grub_video_bitmap_create_scaled) (struct grub_video_bitmap **dst,
grub_video_bitmap_scale_method
scale_method);
grub_err_t
EXPORT_FUNC (grub_video_bitmap_scale_proportional)
(struct grub_video_bitmap **dst,
int dst_width, int dst_height,
struct grub_video_bitmap *src,
enum grub_video_bitmap_scale_method
scale_method,
grub_video_bitmap_selection_method_t
selection_method,
grub_video_bitmap_v_align_t v_align,
grub_video_bitmap_h_align_t h_align);
#endif /* ! GRUB_BITMAP_SCALE_HEADER */

7
include/grub/gfxmenu_view.h
View File

@ -75,6 +75,7 @@ int grub_font_get_string_width (grub_font_t font,
#include <grub/video.h>
#include <grub/bitmap.h>
#include <grub/bitmap_scale.h>
#include <grub/gui.h>
#include <grub/gfxwidgets.h>
#include <grub/icon_manager.h>
@ -94,7 +95,11 @@ struct grub_gfxmenu_view
grub_video_rgba_color_t title_color;
grub_video_rgba_color_t message_color;
grub_video_rgba_color_t message_bg_color;
struct grub_video_bitmap *desktop_image;
struct grub_video_bitmap *raw_desktop_image;
struct grub_video_bitmap *scaled_desktop_image;
grub_video_bitmap_selection_method_t desktop_image_scale_method;
grub_video_bitmap_h_align_t desktop_image_h_align;
grub_video_bitmap_v_align_t desktop_image_v_align;
grub_video_rgba_color_t desktop_color;
grub_gfxmenu_box_t terminal_box;
char *title_text;