mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-11-24 23:39:51 +03:00
300 lines
8.3 KiB
C
300 lines
8.3 KiB
C
/*
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* Copyright 2008 Vincent Sanders <vince@simtec.co.uk>
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*
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* Framebuffer interface
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*
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* This file is part of NetSurf, http://www.netsurf-browser.org/
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <libnsfb.h>
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#include <libnsfb_plot.h>
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#include <libnsfb_legacy_plot.h>
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#include <libnsfb_event.h>
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#include <libnsfb_cursor.h>
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#include "utils/log.h"
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#include "desktop/browser.h"
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#include "desktop/plotters.h"
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#include "framebuffer/gui.h"
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#include "framebuffer/fbtk.h"
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#include "framebuffer/framebuffer.h"
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#include "framebuffer/bitmap.h"
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#include "framebuffer/font.h"
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/* netsurf framebuffer library handle */
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static nsfb_t *nsfb;
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#ifdef FB_USE_FREETYPE
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static bool framebuffer_plot_text(int x, int y, const struct css_style *style,
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const char *text, size_t length, colour bg, colour c)
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{
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uint32_t ucs4;
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size_t nxtchr = 0;
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FT_Glyph glyph;
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FT_BitmapGlyph bglyph;
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nsfb_bbox_t loc;
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while (nxtchr < length) {
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ucs4 = utf8_to_ucs4(text + nxtchr, length - nxtchr);
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nxtchr = utf8_next(text, length, nxtchr);
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glyph = fb_getglyph(style, ucs4);
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if (glyph == NULL)
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continue;
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if (glyph->format == FT_GLYPH_FORMAT_BITMAP) {
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bglyph = (FT_BitmapGlyph)glyph;
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loc.x0 = x + bglyph->left;
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loc.y0 = y - bglyph->top;
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loc.x1 = loc.x0 + bglyph->bitmap.width;
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loc.y1 = loc.y0 + bglyph->bitmap.rows;
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/* now, draw to our target surface */
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if (bglyph->bitmap.pixel_mode == FT_PIXEL_MODE_MONO) {
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nsfb_plot_glyph1(nsfb,
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&loc,
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bglyph->bitmap.buffer,
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bglyph->bitmap.pitch,
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c);
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} else {
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nsfb_plot_glyph8(nsfb,
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&loc,
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bglyph->bitmap.buffer,
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bglyph->bitmap.pitch,
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c);
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}
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}
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x += glyph->advance.x >> 16;
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}
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return true;
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}
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#else
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static bool framebuffer_plot_text(int x, int y, const struct css_style *style,
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const char *text, size_t length, colour bg, colour c)
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{
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const struct fb_font_desc* fb_font = fb_get_font(style);
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const uint32_t *chrp;
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char *buffer = NULL;
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int chr;
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int blen;
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nsfb_bbox_t loc;
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utf8_to_font_encoding(fb_font, text, length, &buffer);
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if (buffer == NULL)
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return true;
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/* y is given to the fonts baseline we need it to the fonts top */
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y-=((fb_font->height * 75)/100);
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y+=1; /* the coord is the bottom-left of the pixels offset by 1 to make
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* it work since fb coords are the top-left of pixels
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*/
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blen = strlen(buffer);
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for (chr = 0; chr < blen; chr++) {
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loc.x0 = x;
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loc.y0 = y;
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loc.x1 = loc.x0 + fb_font->width;
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loc.y1 = loc.y0 + fb_font->height;
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chrp = fb_font->data + ((unsigned char)buffer[chr] * fb_font->height);
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nsfb_plot_glyph1(nsfb, &loc, (uint8_t *)chrp, 32, c);
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x+=fb_font->width;
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}
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free(buffer);
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return true;
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}
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#endif
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static bool
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framebuffer_plot_bitmap(int x, int y,
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int width, int height,
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struct bitmap *bitmap, colour bg,
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bitmap_flags_t flags)
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{
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int xf,yf;
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nsfb_bbox_t loc;
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nsfb_bbox_t clipbox;
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bool repeat_x = (flags & BITMAPF_REPEAT_X);
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bool repeat_y = (flags & BITMAPF_REPEAT_Y);
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nsfb_plot_get_clip(nsfb, &clipbox);
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/* x and y define coordinate of top left of of the initial explicitly
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* placed tile. The width and height are the image scaling and the
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* bounding box defines the extent of the repeat (which may go in all
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* four directions from the initial tile).
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*/
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if (!(repeat_x || repeat_y)) {
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/* Not repeating at all, so just plot it */
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loc.x0 = x;
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loc.y0 = y;
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loc.x1 = loc.x0 + width;
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loc.y1 = loc.y0 + height;
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return nsfb_plot_bitmap(nsfb, &loc,
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(nsfb_colour_t *)bitmap->pixdata,
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bitmap->width, bitmap->height,
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bitmap->width, !bitmap->opaque);
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}
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/* get left most tile position */
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if (repeat_x)
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for (; x > clipbox.x0; x -= width);
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/* get top most tile position */
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if (repeat_y)
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for (; y > clipbox.y0; y -= height);
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/* tile down and across to extents */
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for (xf = x; xf < clipbox.x1; xf += width) {
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for (yf = y; yf < clipbox.y1; yf += height) {
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loc.x0 = xf;
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loc.y0 = yf;
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loc.x1 = loc.x0 + width;
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loc.y1 = loc.y0 + height;
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nsfb_plot_bitmap(nsfb, &loc,
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(nsfb_colour_t *)bitmap->pixdata,
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bitmap->width, bitmap->height,
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bitmap->width, !bitmap->opaque);
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if (!repeat_y)
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break;
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}
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if (!repeat_x)
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break;
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}
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return true;
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}
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static bool framebuffer_plot_flush(void)
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{
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LOG(("flush unimplemnted"));
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return true;
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}
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static bool
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framebuffer_plot_path(const float *p,
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unsigned int n,
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colour fill,
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float width,
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colour c,
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const float transform[6])
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{
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LOG(("path unimplemented"));
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return true;
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}
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struct plotter_table plot = {
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.rectangle = nsfb_lplot_rectangle,
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.line = nsfb_lplot_line,
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.polygon = nsfb_lplot_polygon,
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.fill = nsfb_lplot_fill,
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.clip = nsfb_lplot_clip,
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.text = framebuffer_plot_text,
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.disc = nsfb_lplot_disc,
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.arc = nsfb_lplot_arc,
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.bitmap = framebuffer_plot_bitmap,
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.flush = framebuffer_plot_flush,
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.path = framebuffer_plot_path,
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.option_knockout = true,
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};
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nsfb_t *
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framebuffer_initialise(int argc, char** argv)
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{
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const char *fename;
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enum nsfb_frontend_e fetype;
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/* select frontend from commandline */
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if ((argc > 2) && (argv[1][0] == '-') &&
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(argv[1][1] == 'f') &&
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(argv[1][2] == 'e') &&
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(argv[1][3] == 0)) {
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int argcmv;
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fename = (const char *)argv[2];
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for (argcmv = 3; argcmv < argc; argcmv++) {
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argv[argcmv - 2] = argv[argcmv];
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}
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argc-=2;
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} else {
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fename="sdl";
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}
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fetype = nsfb_frontend_from_name(fename);
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if (fetype == NSFB_FRONTEND_NONE) {
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LOG(("The %s frontend is not available from libnsfb\n", fename));
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return NULL;
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}
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nsfb = nsfb_init(fetype);
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if (nsfb == NULL) {
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LOG(("Unable to initialise nsfb with %s frontend\n", fename));
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return NULL;
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}
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if (nsfb_set_geometry(nsfb, 0, 0, 32) == -1) {
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LOG(("Unable to set geometry\n"));
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nsfb_finalise(nsfb);
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return NULL;
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}
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nsfb_cursor_init(nsfb);
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if (nsfb_init_frontend(nsfb) == -1) {
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LOG(("Unable to initialise nsfb frontend\n"));
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nsfb_finalise(nsfb);
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return NULL;
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}
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nsfb_lplot_ctx(nsfb);
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return nsfb;
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}
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void
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framebuffer_finalise(void)
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{
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nsfb_finalise(nsfb);
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}
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bool
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framebuffer_set_cursor(struct bitmap *bm)
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{
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return nsfb_cursor_set(nsfb, (nsfb_colour_t *)bm->pixdata, bm->width, bm->height, bm->width);
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}
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