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netsurf/framebuffer/fb_16bpp_plotters.c
Vincent Sanders cdd940897c Unroll some fill loops, enable adrianl improved ablend function 
svn path=/trunk/netsurf/; revision=6657
2009-02-27 11:36:18 +00:00

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/*
* Copyright 2008 Vincent Sanders <vince@simtec.co.uk>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf 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; version 2 of the License.
*
* NetSurf 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <sys/types.h>
#include <stdint.h>
#include <string.h>
#include <limits.h>
#include "utils/log.h"
#include "utils/utf8.h"
#include "desktop/plotters.h"
#include "framebuffer/fb_gui.h"
#include "framebuffer/fb_plotters.h"
#include "framebuffer/fb_bitmap.h"
#include "framebuffer/fb_font.h"
static inline uint16_t *
fb_16bpp_get_xy_loc(int x, int y)
{
return (void *)(framebuffer->ptr +
(y * framebuffer->linelen) +
(x << 1));
}
static inline colour fb_16bpp_to_colour(uint16_t pixel)
{
return ((pixel & 0x1F) << 19) |
((pixel & 0x7E0) << 5) |
((pixel & 0xF800) >> 8);
}
/* convert a colour value to a 16bpp pixel value ready for screen output */
static inline uint16_t fb_colour_to_pixel(colour c)
{
return ((c & 0xF8) << 8) | ((c & 0xFC00 ) >> 5) | ((c & 0xF80000) >> 19);
}
#define SIGN(x) ((x<0) ? -1 : ((x>0) ? 1 : 0))
static bool fb_16bpp_line(int x0, int y0, int x1, int y1, int width,
colour c, bool dotted, bool dashed)
{
int w;
uint16_t ent;
uint16_t *pvideo;
int x, y, i;
int dx, dy, sdy;
int dxabs, dyabs;
/*LOG(("%d, %d, %d, %d, %d, 0x%lx, %d, %d",
x0,y0,x1,y1,width,c,dotted,dashed));*/
if (y1 > fb_plot_ctx.y1)
return true;
if (y0 < fb_plot_ctx.y0)
return true;
ent = fb_colour_to_pixel(c);
if (y0 == y1) {
/* horizontal line special cased */
if (!fb_plotters_clip_rect_ctx(&x0, &y0, &x1, &y1))
return true; /* line outside clipping */
/*LOG(("horiz: %d, %d, %d, %d, %d, 0x%lx, %d, %d",
x0,y0,x1,y1,width,c,dotted,dashed));*/
pvideo = fb_16bpp_get_xy_loc(x0, y0);
w = x1 - x0;
while (w-- > 0) {
*(pvideo + w) = ent;
}
return true;
} else {
/* standard bresenham line */
if (!fb_plotters_clip_line_ctx(&x0, &y0, &x1, &y1))
return true; /* line outside clipping */
//LOG(("%d, %d, %d, %d", x0,y0,x1,y1));
/* the horizontal distance of the line */
dx = x1 - x0;
dxabs = abs (dx);
/* the vertical distance of the line */
dy = y1 - y0;
dyabs = abs (dy);
sdy = dx ? SIGN(dy) * SIGN(dx) : SIGN(dy);
if (dx >= 0)
pvideo = fb_16bpp_get_xy_loc(x0, y0);
else
pvideo = fb_16bpp_get_xy_loc(x1, y1);
x = dyabs >> 1;
y = dxabs >> 1;
if (dxabs >= dyabs) {
/* the line is more horizontal than vertical */
for (i = 0; i <= dxabs; i++) {
*pvideo = ent;
pvideo++;
y += dyabs;
if (y >= dxabs) {
y -= dxabs;
pvideo += sdy * (framebuffer->linelen>>1);
}
}
} else {
/* the line is more vertical than horizontal */
for (i = 0; i <= dyabs; i++) {
*pvideo = ent;
pvideo += sdy * (framebuffer->linelen >> 1);
x += dxabs;
if (x >= dyabs) {
x -= dyabs;
pvideo++;
}
}
}
}
return true;
}
static bool fb_16bpp_rectangle(int x0, int y0, int width, int height,
int line_width, colour c, bool dotted, bool dashed)
{
fb_16bpp_line(x0, y0, x0 + width, y0, line_width, c, dotted, dashed);
fb_16bpp_line(x0, y0 + height, x0 + width, y0 + height, line_width, c, dotted, dashed);
fb_16bpp_line(x0, y0, x0, y0 + height, line_width, c, dotted, dashed);
fb_16bpp_line(x0 + width, y0, x0 + width, y0 + height, line_width, c, dotted, dashed);
return true;
}
static bool fb_16bpp_polygon(const int *p, unsigned int n, colour fill)
{
return fb_plotters_polygon(p, n, fill, fb_16bpp_line);
}
static bool fb_16bpp_fill(int x0, int y0, int x1, int y1, colour c)
{
int w;
uint16_t *pvid16;
uint16_t ent16;
uint32_t *pvid32;
uint32_t ent32;
uint32_t llen;
uint32_t width;
uint32_t height;
if (!fb_plotters_clip_rect_ctx(&x0, &y0, &x1, &y1))
return true; /* fill lies outside current clipping region */
ent16 = fb_colour_to_pixel(c);
width = x1 - x0;
height = y1 - y0;
pvid16 = fb_16bpp_get_xy_loc(x0, y0);
if (((x0 & 1) == 0) && ((width & 1) == 0)) {
/* aligned to 32bit value and width is even */
width = width >> 1;
llen = (framebuffer->linelen >> 2) - width;
ent32 = ent16 | (ent16 << 16);
pvid32 = (uint32_t *)pvid16;
while (height-- > 0) {
w = width;
while (w >= 16) {
*pvid32++ = ent32; *pvid32++ = ent32;
*pvid32++ = ent32; *pvid32++ = ent32;
*pvid32++ = ent32; *pvid32++ = ent32;
*pvid32++ = ent32; *pvid32++ = ent32;
*pvid32++ = ent32; *pvid32++ = ent32;
*pvid32++ = ent32; *pvid32++ = ent32;
*pvid32++ = ent32; *pvid32++ = ent32;
*pvid32++ = ent32; *pvid32++ = ent32;
w-=16;
}
while (w >= 4) {
*pvid32++ = ent32; *pvid32++ = ent32;
*pvid32++ = ent32; *pvid32++ = ent32;
w-=4;
}
while (w > 0) {
*pvid32++ = ent32;
w--;
}
// for (w = width; w > 0; w--) *pvid32++ = ent32;
pvid32 += llen;
}
} else {
llen = (framebuffer->linelen >> 1) - width;
while (height-- > 0) {
for (w = width; w > 0; w--) *pvid16++ = ent16;
pvid16 += llen;
}
}
return true;
}
static bool fb_16bpp_clg(colour c)
{
/* LOG(("c %lx", c)); */
fb_16bpp_fill(fb_plot_ctx.x0,
fb_plot_ctx.y0,
fb_plot_ctx.x1,
fb_plot_ctx.y1,
c);
return true;
}
#ifdef FB_USE_FREETYPE
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) = fb_colour_to_pixel(abpixel);
}
}
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_Glyph glyph;
FT_BitmapGlyph bglyph;
while (nxtchr < length) {
ucs4 = utf8_to_ucs4(text + nxtchr, length - nxtchr);
nxtchr = utf8_next(text, length, nxtchr);
glyph = fb_getglyph(style, ucs4);
if (glyph == NULL)
continue;
if (glyph->format == FT_GLYPH_FORMAT_BITMAP) {
bglyph = (FT_BitmapGlyph)glyph;
/* now, draw to our target surface */
if (bglyph->bitmap.pixel_mode == FT_PIXEL_MODE_MONO) {
fb_16bpp_draw_ft_monobitmap(&bglyph->bitmap,
x + bglyph->left,
y - bglyph->top,
c);
} else {
fb_16bpp_draw_ft_bitmap(&bglyph->bitmap,
x + bglyph->left,
y - bglyph->top,
c);
}
}
x += glyph->advance.x >> 16;
}
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)
{
const struct fb_font_desc* fb_font = fb_get_font(style);
const uint32_t *font_data;
int xloop, yloop;
uint32_t row;
size_t chr;
uint16_t *pvideo;
uint16_t fgcol;
uint16_t bgcol;
unsigned char *buffer = NULL;
int x0,y0,x1,y1;
int xoff, yoff; /* x and y offset into image */
int height = fb_font->height;
/* aquire thge text in local font encoding */
utf8_to_font_encoding(fb_font, text, length, (char **)&buffer);
if (!buffer)
return true;
length = strlen((char *)buffer);
/* y is given to the fonts baseline we need it to the fonts top */
y-=((fb_font->height * 75)/100);
y+=1; /* the coord is the bottom-left of the pixels offset by 1 to make
* it work since fb coords are the top-left of pixels
*/
/* The part of the text displayed is cropped to the current context. */
x0 = x;
y0 = y;
x1 = x + (fb_font->width * length);
y1 = y + fb_font->height;
if (!fb_plotters_clip_rect_ctx(&x0, &y0, &x1, &y1))
return true; /* text lies outside current clipping region */
/* find width and height to plot */
if (height > (y1 - y0))
height = (y1 - y0);
xoff = x0 - x;
yoff = y0 - y;
fgcol = fb_colour_to_pixel(c);
bgcol = fb_colour_to_pixel(bg);
/*LOG(("x %d, y %d, style %p, txt %.*s , len %d, bg 0x%lx, fg 0x%lx",
x,y,style,length,text,length,bg,c));*/
for (chr = 0; chr < length; chr++, x += fb_font->width) {
if ((x + fb_font->width) > x1)
break;
if (x < x0)
continue;
pvideo = fb_16bpp_get_xy_loc(x, y0);
/* move our font-data to the correct position */
font_data = fb_font->data + (buffer[chr] * fb_font->height);
for (yloop = 0; yloop < height; yloop++) {
row = font_data[yoff + yloop];
for (xloop = fb_font->width; xloop > 0 ; xloop--) {
if ((row & 1) != 0)
*(pvideo + xloop) = fgcol;
row = row >> 1;
}
pvideo += (framebuffer->linelen >> 1);
}
}
free(buffer);
return true;
}
#endif
static bool fb_16bpp_disc(int x, int y, int radius, colour c, bool filled)
{
LOG(("x %d, y %d, r %d, c 0x%lx, fill %d",
x, y, radius, (unsigned long)c, filled));
return true;
}
static bool fb_16bpp_arc(int x, int y, int radius, int angle1, int angle2,
colour c)
{
LOG(("x %d, y %d, r %d, a1 %d, a2 %d, c 0x%lx",
x, y, radius, angle1, angle2, (unsigned long)c));
return true;
}
static bool fb_16bpp_bitmap(int x, int y, int width, int height,
struct bitmap *bitmap, colour bg,
struct content *content)
{
uint16_t *pvideo;
colour *pixel = (colour *)bitmap->pixdata;
colour abpixel; /* alphablended pixel */
int xloop, yloop;
int x0,y0,x1,y1;
int xoff, yoff; /* x and y offset into image */
/* LOG(("x %d, y %d, width %d, height %d, bitmap %p, content %p",
x,y,width,height,bitmap,content));*/
/* TODO here we should scale the image from bitmap->width to width, for
* now simply crop.
*/
if (width > bitmap->width)
width = bitmap->width;
if (height > bitmap->height)
height = bitmap->height;
/* 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) * bitmap->width;
height = height * bitmap->width + yoff;
/* plot the image */
pvideo = fb_16bpp_get_xy_loc(x0, y0);
for (yloop = yoff; yloop < height; yloop += bitmap->width) {
for (xloop = 0; xloop < width; xloop++) {
abpixel = pixel[yloop + xloop + xoff];
if ((abpixel & 0xFF000000) != 0) {
if ((abpixel & 0xFF000000) != 0xFF000000) {
abpixel = fb_plotters_ablend(abpixel,
fb_16bpp_to_colour(*(pvideo + xloop)));
}
*(pvideo + xloop) = fb_colour_to_pixel(abpixel);
}
}
pvideo += (framebuffer->linelen >> 1);
}
return true;
}
static bool fb_16bpp_bitmap_tile(int x, int y, int width, int height,
struct bitmap *bitmap, colour bg,
bool repeat_x, bool repeat_y,
struct content *content)
{
return fb_plotters_bitmap_tile(x, y, width, height,
bitmap, bg, repeat_x, repeat_y,
content, fb_16bpp_bitmap);
}
static bool fb_16bpp_flush(void)
{
LOG(("optional"));
return true;
}
static bool fb_16bpp_path(const float *p, unsigned int n, colour fill, float width,
colour c, const float transform[6])
{
LOG(("%f, %d, 0x%lx, %f, 0x%lx, %f",
*p, n, (unsigned long)fill, width, (unsigned long)c, *transform));
return true;
}
const struct plotter_table framebuffer_16bpp_plot = {
.clg = fb_16bpp_clg,
.rectangle = fb_16bpp_rectangle,
.line = fb_16bpp_line,
.polygon = fb_16bpp_polygon,
.fill = fb_16bpp_fill,
.clip = fb_clip,
.text = fb_16bpp_text,
.disc = fb_16bpp_disc,
.arc = fb_16bpp_arc,
.bitmap = fb_16bpp_bitmap,
.bitmap_tile = fb_16bpp_bitmap_tile,
.flush = fb_16bpp_flush,
.path = fb_16bpp_path,
.option_knockout = true,
};
/*
* Local Variables:
* c-basic-offset:8
* End:
*/
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