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netsurf/framebuffer/framebuffer.c
Michael Drake bffa2b64de Treat tiled images scaled to 1x1 as flat fills of the tiled area. 
svn path=/trunk/netsurf/; revision=10616
2010-07-08 20:38:48 +00:00

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/*
* Copyright 2008 Vincent Sanders <vince@simtec.co.uk>
*
* Framebuffer interface
*
* 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 <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <libnsfb.h>
#include <libnsfb_plot.h>
#include <libnsfb_event.h>
#include <libnsfb_cursor.h>
#include "utils/log.h"
#include "desktop/browser.h"
#include "desktop/plotters.h"
#include "framebuffer/gui.h"
#include "framebuffer/fbtk.h"
#include "framebuffer/framebuffer.h"
#include "framebuffer/bitmap.h"
#include "framebuffer/font.h"
/* netsurf framebuffer library handle */
static nsfb_t *nsfb;
static bool
framebuffer_plot_disc(int x, int y, int radius, const plot_style_t *style)
{
nsfb_bbox_t ellipse;
ellipse.x0 = x - radius;
ellipse.y0 = y - radius;
ellipse.x1 = x + radius;
ellipse.y1 = y + radius;
if (style->fill_type != PLOT_OP_TYPE_NONE) {
nsfb_plot_ellipse_fill(nsfb, &ellipse, style->fill_colour);
}
if (style->stroke_type != PLOT_OP_TYPE_NONE) {
nsfb_plot_ellipse(nsfb, &ellipse, style->stroke_colour);
}
return true;
}
static bool
framebuffer_plot_arc(int x, int y, int radius, int angle1, int angle2, const plot_style_t *style)
{
return nsfb_plot_arc(nsfb, x, y, radius, angle1, angle2, style->fill_colour);
}
static bool
framebuffer_plot_polygon(const int *p, unsigned int n, const plot_style_t *style)
{
return nsfb_plot_polygon(nsfb, p, n, style->fill_colour);
}
#ifdef FB_USE_FREETYPE
static bool
framebuffer_plot_text(int x, int y, const char *text, size_t length,
const plot_font_style_t *fstyle)
{
uint32_t ucs4;
size_t nxtchr = 0;
FT_Glyph glyph;
FT_BitmapGlyph bglyph;
nsfb_bbox_t loc;
while (nxtchr < length) {
ucs4 = utf8_to_ucs4(text + nxtchr, length - nxtchr);
nxtchr = utf8_next(text, length, nxtchr);
glyph = fb_getglyph(fstyle, ucs4);
if (glyph == NULL)
continue;
if (glyph->format == FT_GLYPH_FORMAT_BITMAP) {
bglyph = (FT_BitmapGlyph)glyph;
loc.x0 = x + bglyph->left;
loc.y0 = y - bglyph->top;
loc.x1 = loc.x0 + bglyph->bitmap.width;
loc.y1 = loc.y0 + bglyph->bitmap.rows;
/* now, draw to our target surface */
if (bglyph->bitmap.pixel_mode == FT_PIXEL_MODE_MONO) {
nsfb_plot_glyph1(nsfb,
&loc,
bglyph->bitmap.buffer,
bglyph->bitmap.pitch,
fstyle->foreground);
} else {
nsfb_plot_glyph8(nsfb,
&loc,
bglyph->bitmap.buffer,
bglyph->bitmap.pitch,
fstyle->foreground);
}
}
x += glyph->advance.x >> 16;
}
return true;
}
#else
static bool framebuffer_plot_text(int x, int y, const char *text, size_t length,
const plot_font_style_t *fstyle)
{
const struct fb_font_desc* fb_font = fb_get_font(fstyle);
const uint32_t *chrp;
char *buffer = NULL;
int chr;
int blen;
nsfb_bbox_t loc;
utf8_to_font_encoding(fb_font, text, length, &buffer);
if (buffer == NULL)
return true;
/* 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
*/
blen = strlen(buffer);
for (chr = 0; chr < blen; chr++) {
loc.x0 = x;
loc.y0 = y;
loc.x1 = loc.x0 + fb_font->width;
loc.y1 = loc.y0 + fb_font->height;
chrp = fb_font->data + ((unsigned char)buffer[chr] * fb_font->height);
nsfb_plot_glyph1(nsfb, &loc, (uint8_t *)chrp, 32, fstyle->foreground);
x+=fb_font->width;
}
free(buffer);
return true;
}
#endif
static bool
framebuffer_plot_bitmap(int x, int y,
int width, int height,
struct bitmap *bitmap, colour bg,
bitmap_flags_t flags)
{
int xf,yf;
nsfb_bbox_t loc;
nsfb_bbox_t clipbox;
bool repeat_x = (flags & BITMAPF_REPEAT_X);
bool repeat_y = (flags & BITMAPF_REPEAT_Y);
nsfb_plot_get_clip(nsfb, &clipbox);
/* x and y define coordinate of top left of of the initial explicitly
* placed tile. The width and height are the image scaling and the
* bounding box defines the extent of the repeat (which may go in all
* four directions from the initial tile).
*/
if (!(repeat_x || repeat_y)) {
/* Not repeating at all, so just plot it */
loc.x0 = x;
loc.y0 = y;
loc.x1 = loc.x0 + width;
loc.y1 = loc.y0 + height;
if ((bitmap->width == 1) && (bitmap->height == 1)) {
if ((*(nsfb_colour_t *)bitmap->pixdata & 0xff000000) == 0) {
return true;
}
return nsfb_plot_rectangle_fill(nsfb, &loc, *(nsfb_colour_t *)bitmap->pixdata);
} else {
return nsfb_plot_bitmap(nsfb, &loc,
(nsfb_colour_t *)bitmap->pixdata,
bitmap->width, bitmap->height,
bitmap->width, !bitmap->opaque);
}
}
/* Optimise tiled plots of 1x1 bitmaps by replacing with a flat fill
* of the area. Can only be done when image is fully opaque. */
if ((bitmap->width == 1) && (bitmap->height == 1)) {
if ((*(nsfb_colour_t *)bitmap->pixdata & 0xff000000) != 0) {
return nsfb_plot_rectangle_fill(nsfb, &clipbox,
*(nsfb_colour_t *)bitmap->pixdata);
}
}
/* Optimise tiled plots of bitmaps scaled to 1x1 by replacing with
* a flat fill of the area. Can only be done when image is fully
* opaque. */
if ((width == 1) && (height == 1)) {
if (bitmap->opaque) {
/** TODO: Currently using top left pixel. Maybe centre
* pixel or average value would be better. */
return nsfb_plot_rectangle_fill(nsfb, &clipbox,
*(nsfb_colour_t *)bitmap->pixdata);
}
}
/* get left most tile position */
if (repeat_x)
for (; x > clipbox.x0; x -= width);
/* get top most tile position */
if (repeat_y)
for (; y > clipbox.y0; y -= height);
/* tile down and across to extents */
for (xf = x; xf < clipbox.x1; xf += width) {
for (yf = y; yf < clipbox.y1; yf += height) {
loc.x0 = xf;
loc.y0 = yf;
loc.x1 = loc.x0 + width;
loc.y1 = loc.y0 + height;
nsfb_plot_bitmap(nsfb, &loc,
(nsfb_colour_t *)bitmap->pixdata,
bitmap->width, bitmap->height,
bitmap->width, !bitmap->opaque);
if (!repeat_y)
break;
}
if (!repeat_x)
break;
}
return true;
}
static bool
framebuffer_plot_rectangle(int x0, int y0, int x1, int y1, const plot_style_t *style)
{
nsfb_bbox_t rect;
bool dotted = false;
bool dashed = false;
rect.x0 = x0;
rect.y0 = y0;
rect.x1 = x1;
rect.y1 = y1;
if (style->fill_type != PLOT_OP_TYPE_NONE) {
nsfb_plot_rectangle_fill(nsfb, &rect, style->fill_colour);
}
if (style->stroke_type != PLOT_OP_TYPE_NONE) {
if (style->stroke_type == PLOT_OP_TYPE_DOT)
dotted = true;
if (style->stroke_type == PLOT_OP_TYPE_DASH)
dashed = true;
nsfb_plot_rectangle(nsfb, &rect, style->stroke_width, style->stroke_colour, dotted, dashed);
}
return true;
}
static bool
framebuffer_plot_line(int x0, int y0, int x1, int y1, const plot_style_t *style)
{
nsfb_bbox_t rect;
nsfb_plot_pen_t pen;
rect.x0 = x0;
rect.y0 = y0;
rect.x1 = x1;
rect.y1 = y1;
if (style->stroke_type != PLOT_OP_TYPE_NONE) {
if (style->stroke_type == PLOT_OP_TYPE_DOT) {
pen.stroke_type = NFSB_PLOT_OPTYPE_PATTERN;
pen.stroke_pattern = 0xAAAAAAAA;
} else if (style->stroke_type == PLOT_OP_TYPE_DASH) {
pen.stroke_type = NFSB_PLOT_OPTYPE_PATTERN;
pen.stroke_pattern = 0xF0F0F0F0;
} else {
pen.stroke_type = NFSB_PLOT_OPTYPE_SOLID;
}
pen.stroke_colour = style->stroke_colour;
pen.stroke_width = style->stroke_width;
nsfb_plot_line(nsfb, &rect, &pen);
}
return true;
}
static bool
framebuffer_plot_path(const float *p,
unsigned int n,
colour fill,
float width,
colour c,
const float transform[6])
{
LOG(("path unimplemented"));
return true;
}
static bool
framebuffer_plot_clip(int x0, int y0, int x1, int y1)
{
nsfb_bbox_t clip;
clip.x0 = x0;
clip.y0 = y0;
clip.x1 = x1;
clip.y1 = y1;
return nsfb_plot_set_clip(nsfb, &clip);
}
struct plotter_table plot = {
.clip = framebuffer_plot_clip,
.arc = framebuffer_plot_arc,
.disc = framebuffer_plot_disc,
.line = framebuffer_plot_line,
.rectangle = framebuffer_plot_rectangle,
.polygon = framebuffer_plot_polygon,
.path = framebuffer_plot_path,
.bitmap = framebuffer_plot_bitmap,
.text = framebuffer_plot_text,
.option_knockout = true,
};
nsfb_t *
framebuffer_initialise(const char *fename, int width, int height, int bpp)
{
enum nsfb_frontend_e fetype;
fetype = nsfb_frontend_from_name(fename);
if (fetype == NSFB_FRONTEND_NONE) {
LOG(("The %s frontend is not available from libnsfb\n", fename));
return NULL;
}
nsfb = nsfb_init(fetype);
if (nsfb == NULL) {
LOG(("Unable to initialise nsfb with %s frontend\n", fename));
return NULL;
}
if (nsfb_set_geometry(nsfb, width, height, bpp) == -1) {
LOG(("Unable to set geometry\n"));
nsfb_finalise(nsfb);
return NULL;
}
nsfb_cursor_init(nsfb);
if (nsfb_init_frontend(nsfb) == -1) {
LOG(("Unable to initialise nsfb frontend\n"));
nsfb_finalise(nsfb);
return NULL;
}
return nsfb;
}
void
framebuffer_finalise(void)
{
nsfb_finalise(nsfb);
}
bool
framebuffer_set_cursor(struct bitmap *bm)
{
return nsfb_cursor_set(nsfb, (nsfb_colour_t *)bm->pixdata, bm->width, bm->height, bm->width);
}
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