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Restructure rendering to make extensions easier

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2010-01-08 18:48:41 +01:00
parent 82c5d8dcfc
commit 4361ca1c37
3 changed files with 146 additions and 173 deletions
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304
font/font.c
View file

@ -1111,20 +1111,129 @@ get_comb_type (grub_uint32_t c)
return GRUB_BIDI_TYPE_L;
}
static void
blit_comb (const struct grub_unicode_glyph *glyph_id,
struct grub_font_glyph *glyph,
struct grub_video_signed_rect *bounds_out,
struct grub_font_glyph *main_glyph,
struct grub_font_glyph **combining_glyphs)
{
struct grub_video_signed_rect bounds;
unsigned i;
auto void NESTED_FUNC_ATTR do_blit (struct grub_font_glyph *src,
signed dx, signed dy);
void NESTED_FUNC_ATTR do_blit (struct grub_font_glyph *src,
signed dx, signed dy)
{
if (glyph)
grub_font_blit_glyph (glyph, src, dx - glyph->offset_x,
(glyph->height + glyph->offset_y) + dy);
if (dx < bounds.x)
{
bounds.width += bounds.x - dx;
bounds.x = dx;
}
if (bounds.y > -src->height - dy)
{
bounds.height += bounds.y - (-src->height - dy);
bounds.y = (-src->height - dy);
}
if (dx + src->width - bounds.x >= (signed) bounds.width)
bounds.width = dx + src->width - bounds.x + 1;
if ((signed) bounds.height < src->height + (-src->height - dy) - bounds.y)
bounds.height = src->height + (-src->height - dy) - bounds.y;
}
auto void minimal_device_width (int val);
void minimal_device_width (int val)
{
if (glyph && glyph->device_width < val)
glyph->device_width = val;
}
auto void add_device_width (int val);
void add_device_width (int val)
{
if (glyph)
glyph->device_width += val;
}
bounds.x = main_glyph->offset_x;
bounds.y = main_glyph->offset_y;
bounds.width = main_glyph->width;
bounds.height = main_glyph->height;
for (i = 0; i < glyph_id->ncomb; i++)
{
enum grub_comb_type combtype;
grub_int16_t space = 0;
grub_int16_t centerx = (bounds.width - combining_glyphs[i]->width) / 2
+ bounds.x;
if (!combining_glyphs[i])
continue;
combtype = get_comb_type (glyph_id->combining[i]);
switch (combtype)
{
case GRUB_UNICODE_COMB_OVERLAY:
do_blit (combining_glyphs[i],
centerx,
(bounds.height - combining_glyphs[i]->height) / 2
-(bounds.height + bounds.y));
minimal_device_width (combining_glyphs[i]->width);
break;
case GRUB_UNICODE_STACK_ABOVE:
space = combining_glyphs[i]->offset_y
- grub_font_get_xheight (combining_glyphs[i]->font);
if (space < 0)
space = 1 + (grub_font_get_xheight (main_glyph->font)) / 8;
case GRUB_UNICODE_STACK_ATTACHED_ABOVE:
do_blit (combining_glyphs[i], centerx,
-(bounds.height + bounds.y + space
+ combining_glyphs[i]->height));
minimal_device_width (combining_glyphs[i]->width);
break;
case GRUB_UNICODE_STACK_BELOW:
space = -(combining_glyphs[i]->offset_y
+ combining_glyphs[i]->height);
if (space < 0)
space = 1 + (grub_font_get_xheight (main_glyph->font)) / 8;
case GRUB_UNICODE_STACK_ATTACHED_BELOW:
do_blit (combining_glyphs[i], centerx,
-(bounds.y - space));
minimal_device_width (combining_glyphs[i]->width);
break;
default:
{
/* Default handling. Just draw combining character on top
of base character.
FIXME: support more unicode types correctly.
*/
do_blit (combining_glyphs[i],
main_glyph->device_width
+ combining_glyphs[i]->offset_x,
- (combining_glyphs[i]->height
+ combining_glyphs[i]->offset_y));
add_device_width (combining_glyphs[i]->device_width);
}
}
}
if (bounds_out)
*bounds_out = bounds;
}
static struct grub_font_glyph *
grub_font_construct_glyph (grub_font_t hinted_font,
const struct grub_unicode_glyph *glyph_id)
{
grub_font_t font;
grub_uint16_t width;
grub_uint16_t height;
grub_int16_t offset_x;
grub_int16_t offset_y;
grub_int16_t curtop, curbottom;
grub_uint16_t device_width;
struct grub_video_signed_rect bounds;
struct grub_font_glyph *main_glyph;
struct grub_font_glyph **combining_glyphs;
unsigned i;
struct grub_font_glyph *glyph;
main_glyph = grub_font_get_glyph_with_fallback (hinted_font, glyph_id->base);
@ -1147,106 +1256,17 @@ grub_font_construct_glyph (grub_font_t hinted_font,
}
font = main_glyph->font;
width = main_glyph->width;
height = main_glyph->height;
offset_x = main_glyph->offset_x;
offset_y = main_glyph->offset_y;
device_width = main_glyph->device_width;
for (i = 0; i < glyph_id->ncomb; i++)
{
enum grub_comb_type combtype;
unsigned i;
for (i = 0; i < glyph_id->ncomb; i++)
combining_glyphs[i]
= grub_font_get_glyph_with_fallback (font, glyph_id->combining[i]);
if (!combining_glyphs[i])
continue;
combtype = get_comb_type (glyph_id->combining[i]);
switch (combtype)
{
case GRUB_UNICODE_COMB_OVERLAY:
if (height < combining_glyphs[i]->height)
{
offset_y -= (combining_glyphs[i]->height - height) / 2;
height = combining_glyphs[i]->height;
}
if (width < combining_glyphs[i]->width)
{
offset_x -= (combining_glyphs[i]->width - width) / 2;
width = combining_glyphs[i]->width;
}
if (device_width < combining_glyphs[i]->width)
device_width = combining_glyphs[i]->width;
break;
case GRUB_UNICODE_STACK_ABOVE:
{
grub_int16_t space;
space = combining_glyphs[i]->offset_y
- grub_font_get_xheight (combining_glyphs[i]->font);
if (space < 1)
space = 1;
if (width < combining_glyphs[i]->width)
{
offset_x -= (combining_glyphs[i]->width - width) / 2;
width = combining_glyphs[i]->width;
}
if (device_width < combining_glyphs[i]->width)
device_width = combining_glyphs[i]->width;
height += combining_glyphs[i]->height + space;
}
break;
case GRUB_UNICODE_STACK_BELOW:
{
grub_int16_t space;
space = -(combining_glyphs[i]->offset_y
+ combining_glyphs[i]->height);
if (space < 1)
space = 1;
if (width < combining_glyphs[i]->width)
{
offset_x -= (combining_glyphs[i]->width - width) / 2;
width = combining_glyphs[i]->width;
}
if (device_width < combining_glyphs[i]->width)
device_width = combining_glyphs[i]->width;
height += combining_glyphs[i]->height + space;
offset_y -= combining_glyphs[i]->height + space;
}
break;
default:
{
/* Default handling. Just draw combining character on top
of base character.
FIXME: support more unicode types correctly.
*/
grub_int16_t nx = main_glyph->device_width
+ combining_glyphs[i]->offset_x;
device_width += combining_glyphs[i]->device_width;
if (nx < offset_x)
{
width += offset_x - nx;
offset_x = nx;
}
if (offset_y > combining_glyphs[i]->offset_y)
{
height += offset_y - combining_glyphs[i]->offset_y;
offset_y = combining_glyphs[i]->offset_y;
}
if (nx + combining_glyphs[i]->width - offset_x >= width)
width = nx + combining_glyphs[i]->width - offset_x + 1;
if (height
< (combining_glyphs[i]->height
+ combining_glyphs[i]->offset_y) - offset_y)
height = (combining_glyphs[i]->height
+ combining_glyphs[i]->offset_y) - offset_y;
}
}
}
glyph = grub_zalloc (sizeof (*glyph) + (width * height + 7) / 8);
blit_comb (glyph_id, NULL, &bounds, main_glyph, combining_glyphs);
glyph = grub_zalloc (sizeof (*glyph) + (bounds.width * bounds.height + 7) / 8);
if (!glyph)
{
grub_errno = GRUB_ERR_NONE;
@ -1254,84 +1274,24 @@ grub_font_construct_glyph (grub_font_t hinted_font,
}
glyph->font = font;
glyph->width = width;
glyph->height = height;
glyph->offset_x = offset_x;
glyph->offset_y = offset_y;
glyph->device_width = device_width;
glyph->width = bounds.width;
glyph->height = bounds.height;
glyph->offset_x = bounds.x;
glyph->offset_y = bounds.y;
glyph->device_width = main_glyph->device_width;
if (glyph_id->attributes & GRUB_UNICODE_GLYPH_ATTRIBUTE_MIRROR)
grub_font_blit_glyph_mirror (glyph, main_glyph,
main_glyph->offset_x - offset_x,
(height + offset_y)
main_glyph->offset_x - glyph->offset_x,
(glyph->height + glyph->offset_y)
- (main_glyph->height + main_glyph->offset_y));
else
grub_font_blit_glyph (glyph, main_glyph, main_glyph->offset_x - offset_x,
(height + offset_y)
grub_font_blit_glyph (glyph, main_glyph,
main_glyph->offset_x - glyph->offset_x,
(glyph->height + glyph->offset_y)
- (main_glyph->height + main_glyph->offset_y));
curtop = main_glyph->height + main_glyph->offset_y;
curbottom = main_glyph->offset_y;
for (i = 0; i < glyph_id->ncomb; i++)
{
enum grub_comb_type combtype;
grub_int16_t space = 0;
if (!combining_glyphs[i])
continue;
combtype = get_comb_type (glyph_id->combining[i]);
switch (combtype)
{
case GRUB_UNICODE_COMB_OVERLAY:
grub_font_blit_glyph (glyph, combining_glyphs[i],
(width - combining_glyphs[i]->width) / 2,
(height - combining_glyphs[i]->height) / 2);
break;
case GRUB_UNICODE_STACK_ABOVE:
space = combining_glyphs[i]->offset_y
- grub_font_get_xheight (combining_glyphs[i]->font);
if (space < 0)
space = 1;
case GRUB_UNICODE_STACK_ATTACHED_ABOVE:
curtop += combining_glyphs[i]->height + space;
grub_font_blit_glyph (glyph, combining_glyphs[i],
(width - combining_glyphs[i]->width) / 2,
(height + offset_y) - curtop);
break;
case GRUB_UNICODE_STACK_BELOW:
space = -(combining_glyphs[i]->offset_y
+ combining_glyphs[i]->height);
if (space < 0)
space = 1;
case GRUB_UNICODE_STACK_ATTACHED_BELOW:
curbottom -= space;
grub_font_blit_glyph (glyph, combining_glyphs[i],
(width - combining_glyphs[i]->width) / 2,
(height + offset_y) - curbottom);
curbottom -= combining_glyphs[i]->height;
break;
default:
{
/* Default handling. Just draw combining character on top
of base character.
FIXME: support more unicode types correctly.
*/
grub_font_blit_glyph (glyph, combining_glyphs[i],
main_glyph->device_width
+ combining_glyphs[i]->offset_x - offset_x,
(height + offset_y)
- (combining_glyphs[i]->height
+ combining_glyphs[i]->offset_y));
}
}
}
blit_comb (glyph_id, glyph, NULL, main_glyph, combining_glyphs);
return glyph;
}

4
include/grub/unicode.h
View file

@ -57,9 +57,13 @@ enum grub_comb_type
{
GRUB_UNICODE_COMB_OVERLAY = 1,
GRUB_UNICODE_STACK_ATTACHED_BELOW = 202,
GRUB_UNICODE_COMB_ATTACHED_BELOW_RIGHT = 204,
GRUB_UNICODE_STACK_ATTACHED_ABOVE = 214,
GRUB_UNICODE_COMB_ATTACHED_ABOVE_RIGHT = 216,
GRUB_UNICODE_STACK_BELOW = 220,
GRUB_UNICODE_COMB_BELOW_RIGHT = 222,
GRUB_UNICODE_STACK_ABOVE = 230,
GRUB_UNICODE_COMB_ABOVE_RIGHT = 232,
/* If combining nature is indicated only by class and
not "combining type". */
GRUB_UNICODE_COMB_ME = 253,

9
include/grub/video.h
View file

@ -167,6 +167,15 @@ struct grub_video_rect
};
typedef struct grub_video_rect grub_video_rect_t;
struct grub_video_signed_rect
{
signed x;
signed y;
unsigned width;
unsigned height;
};
typedef struct grub_video_signed_rect grub_video_signed_rect_t;
struct grub_video_palette_data
{
grub_uint8_t r; /* Red color value (0-255). */