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add 16bpp freetype font plotting

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svn path=/trunk/netsurf/; revision=6610
This commit is contained in:
Vincent Sanders 2009-02-24 09:24:20 +00:00
parent 909b23ec19
commit 3710894c46
1 changed files with 112 additions and 9 deletions
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121
framebuffer/fb_16bpp_plotters.c
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@ -38,6 +38,12 @@ fb_16bpp_get_xy_loc(int x, int y)
(x << 1));
}
static inline colour fb_16bpp_to_colour(uint16_t pixel)
{
return ((pixel & 0x1F) << 19) |
((pixel & 0x7E0) << 5) |
((pixel & 0xF800) >> 8);
}
#define SIGN(x) ((x<0) ? -1 : ((x>0) ? 1 : 0))
@ -192,11 +198,114 @@ static bool fb_16bpp_clg(colour c)
}
#ifdef FB_USE_FREETYPE
static bool fb_16bpp_text(int x, int y, const struct css_style *style,
const char *text, size_t length, colour bg, colour c)
static bool
fb_16bpp_draw_ft_monobitmap(FT_Bitmap *bp, int x, int y, colour c)
{
return false;
}
static bool
fb_16bpp_draw_ft_bitmap(FT_Bitmap *bp, int x, int y, colour c)
{
uint16_t *pvideo;
uint8_t *pixel = (uint8_t *)bp->buffer;
colour abpixel; /* alphablended pixel */
int xloop, yloop;
int x0,y0,x1,y1;
int xoff, yoff; /* x and y offset into image */
int height = bp->rows;
int width = bp->width;
uint32_t fgcol;
/* The part of the scaled image actually displayed is cropped to the
* current context.
*/
x0 = x;
y0 = y;
x1 = x + width;
y1 = y + height;
if (!fb_plotters_clip_rect_ctx(&x0, &y0, &x1, &y1))
return true;
if (height > (y1 - y0))
height = (y1 - y0);
if (width > (x1 - x0))
width = (x1 - x0);
xoff = x0 - x;
yoff = y0 - y;
/* plot the image */
pvideo = fb_16bpp_get_xy_loc(x0, y0);
fgcol = c & 0xFFFFFF;
for (yloop = 0; yloop < height; yloop++) {
for (xloop = 0; xloop < width; xloop++) {
abpixel = (pixel[((yoff + yloop) * bp->pitch) + xloop + xoff] << 24) | fgcol;
if ((abpixel & 0xFF000000) != 0) {
if ((abpixel & 0xFF000000) != 0xFF000000) {
abpixel = fb_plotters_ablend(abpixel,
fb_16bpp_to_colour(*(pvideo + xloop)));
}
*(pvideo + xloop) =
((abpixel & 0xF8) << 8) |
((abpixel & 0xFC00 ) >> 5) |
((abpixel & 0xF80000) >> 19);
}
}
pvideo += (framebuffer->linelen >> 1);
}
return true;
}
static bool fb_16bpp_text(int x, int y, const struct css_style *style,
const char *text, size_t length, colour bg, colour c)
{
uint32_t ucs4;
size_t nxtchr = 0;
FT_UInt glyph_index;
FT_Face face = fb_get_face(style);
FT_Error error;
while (nxtchr < length) {
ucs4 = utf8_to_ucs4(text + nxtchr, length - nxtchr);
nxtchr = utf8_next(text, length, nxtchr);
glyph_index = FT_Get_Char_Index(face, ucs4);
error = FT_Load_Glyph(face,
glyph_index,
FT_LOAD_RENDER |
FT_LOAD_FORCE_AUTOHINT |
ft_load_type);
if (error)
continue;
/* now, draw to our target surface */
if (face->glyph->bitmap.pixel_mode == FT_PIXEL_MODE_MONO) {
fb_16bpp_draw_ft_monobitmap( &face->glyph->bitmap,
x + face->glyph->bitmap_left,
y - face->glyph->bitmap_top,
c);
} else {
fb_16bpp_draw_ft_bitmap( &face->glyph->bitmap,
x + face->glyph->bitmap_left,
y - face->glyph->bitmap_top,
c);
}
x += face->glyph->advance.x >> 6;
}
return true;
}
#else
static bool fb_16bpp_text(int x, int y, const struct css_style *style,
const char *text, size_t length, colour bg, colour c)
@ -302,12 +411,6 @@ static bool fb_16bpp_arc(int x, int y, int radius, int angle1, int angle2,
return true;
}
static inline colour fb_16bpp_to_colour(uint16_t pixel)
{
return ((pixel & 0x1F) << 19) |
((pixel & 0x7E0) << 5) |
((pixel & 0xF800) >> 8);
}
static bool fb_16bpp_bitmap(int x, int y, int width, int height,
struct bitmap *bitmap, colour bg,
@ -359,7 +462,7 @@ static bool fb_16bpp_bitmap(int x, int y, int width, int height,
for (xloop = 0; xloop < width; xloop++) {
abpixel = pixel[((yoff + yloop) * bitmap->width) + xloop + xoff];
if ((abpixel & 0xFF000000) != 0) {
if ((abpixel & 0xFF000000) != 0xFF) {
if ((abpixel & 0xFF000000) != 0xFF000000) {
abpixel = fb_plotters_ablend(abpixel,
fb_16bpp_to_colour(*(pvideo + xloop)));
}