mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-12-27 06:19:42 +03:00
518 lines
16 KiB
C
518 lines
16 KiB
C
/*
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* Copyright 2008 Vincent Sanders <vince@simtec.co.uk>
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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 <sys/types.h>
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#include <stdint.h>
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#include <string.h>
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#include <limits.h>
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#include "utils/log.h"
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#include "utils/utf8.h"
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#include "desktop/plotters.h"
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#include "framebuffer/fb_gui.h"
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#include "framebuffer/fb_plotters.h"
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#include "framebuffer/fb_bitmap.h"
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#include "framebuffer/fb_font.h"
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static inline uint16_t *
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fb_16bpp_get_xy_loc(int x, int y)
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{
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return (void *)(framebuffer->ptr +
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(y * framebuffer->linelen) +
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(x << 1));
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}
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static inline colour fb_16bpp_to_colour(uint16_t pixel)
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{
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return ((pixel & 0x1F) << 19) |
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((pixel & 0x7E0) << 5) |
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((pixel & 0xF800) >> 8);
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}
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/* convert a colour value to a 16bpp pixel value ready for screen output */
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static inline uint16_t fb_colour_to_pixel(colour c)
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{
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return ((c & 0xF8) << 8) | ((c & 0xFC00 ) >> 5) | ((c & 0xF80000) >> 19);
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}
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#define SIGN(x) ((x<0) ? -1 : ((x>0) ? 1 : 0))
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static bool fb_16bpp_line(int x0, int y0, int x1, int y1, int width,
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colour c, bool dotted, bool dashed)
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{
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int w;
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uint16_t ent;
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uint16_t *pvideo;
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int x, y, i;
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int dx, dy, sdy;
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int dxabs, dyabs;
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/*LOG(("%d, %d, %d, %d, %d, 0x%lx, %d, %d",
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x0,y0,x1,y1,width,c,dotted,dashed));*/
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if (y1 > fb_plot_ctx.y1)
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return true;
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if (y0 < fb_plot_ctx.y0)
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return true;
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ent = fb_colour_to_pixel(c);
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if (y0 == y1) {
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/* horizontal line special cased */
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if (!fb_plotters_clip_rect_ctx(&x0, &y0, &x1, &y1))
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return true; /* line outside clipping */
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/*LOG(("horiz: %d, %d, %d, %d, %d, 0x%lx, %d, %d",
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x0,y0,x1,y1,width,c,dotted,dashed));*/
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pvideo = fb_16bpp_get_xy_loc(x0, y0);
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w = x1 - x0;
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while (w-- > 0) {
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*(pvideo + w) = ent;
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}
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return true;
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} else {
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/* standard bresenham line */
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if (!fb_plotters_clip_line_ctx(&x0, &y0, &x1, &y1))
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return true; /* line outside clipping */
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//LOG(("%d, %d, %d, %d", x0,y0,x1,y1));
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/* the horizontal distance of the line */
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dx = x1 - x0;
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dxabs = abs (dx);
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/* the vertical distance of the line */
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dy = y1 - y0;
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dyabs = abs (dy);
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sdy = dx ? SIGN(dy) * SIGN(dx) : SIGN(dy);
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if (dx >= 0)
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pvideo = fb_16bpp_get_xy_loc(x0, y0);
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else
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pvideo = fb_16bpp_get_xy_loc(x1, y1);
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x = dyabs >> 1;
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y = dxabs >> 1;
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if (dxabs >= dyabs) {
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/* the line is more horizontal than vertical */
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for (i = 0; i <= dxabs; i++) {
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*pvideo = ent;
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pvideo++;
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y += dyabs;
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if (y >= dxabs) {
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y -= dxabs;
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pvideo += sdy * (framebuffer->linelen>>1);
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}
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}
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} else {
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/* the line is more vertical than horizontal */
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for (i = 0; i <= dyabs; i++) {
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*pvideo = ent;
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pvideo += sdy * (framebuffer->linelen >> 1);
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x += dxabs;
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if (x >= dyabs) {
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x -= dyabs;
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pvideo++;
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}
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}
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}
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}
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return true;
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}
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static bool fb_16bpp_rectangle(int x0, int y0, int width, int height,
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int line_width, colour c, bool dotted, bool dashed)
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{
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fb_16bpp_line(x0, y0, x0 + width, y0, line_width, c, dotted, dashed);
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fb_16bpp_line(x0, y0 + height, x0 + width, y0 + height, line_width, c, dotted, dashed);
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fb_16bpp_line(x0, y0, x0, y0 + height, line_width, c, dotted, dashed);
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fb_16bpp_line(x0 + width, y0, x0 + width, y0 + height, line_width, c, dotted, dashed);
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return true;
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}
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static bool fb_16bpp_polygon(const int *p, unsigned int n, colour fill)
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{
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return fb_plotters_polygon(p, n, fill, fb_16bpp_line);
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}
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static bool fb_16bpp_fill(int x0, int y0, int x1, int y1, colour c)
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{
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int w;
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uint16_t *pvid;
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uint16_t ent;
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uint32_t llen;
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uint32_t width;
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uint32_t height;
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if (!fb_plotters_clip_rect_ctx(&x0, &y0, &x1, &y1))
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return true; /* fill lies outside current clipping region */
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ent = fb_colour_to_pixel(c);
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width = x1 - x0;
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height = y1 - y0;
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llen = (framebuffer->linelen >> 1) - width;
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pvid = fb_16bpp_get_xy_loc(x0, y0);
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while (height-- > 0) {
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for (w = width; w > 0; w--) *pvid++ = ent;
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pvid += llen;
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}
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return true;
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}
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static bool fb_16bpp_clg(colour c)
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{
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/* LOG(("c %lx", c)); */
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fb_16bpp_fill(fb_plot_ctx.x0,
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fb_plot_ctx.y0,
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fb_plot_ctx.x1,
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fb_plot_ctx.y1,
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c);
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return true;
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}
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#ifdef FB_USE_FREETYPE
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static bool
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fb_16bpp_draw_ft_monobitmap(FT_Bitmap *bp, int x, int y, colour c)
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{
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return false;
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}
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static bool
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fb_16bpp_draw_ft_bitmap(FT_Bitmap *bp, int x, int y, colour c)
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{
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uint16_t *pvideo;
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uint8_t *pixel = (uint8_t *)bp->buffer;
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colour abpixel; /* alphablended pixel */
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int xloop, yloop;
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int x0,y0,x1,y1;
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int xoff, yoff; /* x and y offset into image */
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int height = bp->rows;
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int width = bp->width;
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uint32_t fgcol;
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/* The part of the scaled image actually displayed is cropped to the
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* current context.
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*/
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x0 = x;
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y0 = y;
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x1 = x + width;
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y1 = y + height;
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if (!fb_plotters_clip_rect_ctx(&x0, &y0, &x1, &y1))
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return true;
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if (height > (y1 - y0))
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height = (y1 - y0);
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if (width > (x1 - x0))
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width = (x1 - x0);
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xoff = x0 - x;
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yoff = y0 - y;
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/* plot the image */
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pvideo = fb_16bpp_get_xy_loc(x0, y0);
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fgcol = c & 0xFFFFFF;
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for (yloop = 0; yloop < height; yloop++) {
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for (xloop = 0; xloop < width; xloop++) {
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abpixel = (pixel[((yoff + yloop) * bp->pitch) + xloop + xoff] << 24) | fgcol;
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if ((abpixel & 0xFF000000) != 0) {
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if ((abpixel & 0xFF000000) != 0xFF000000) {
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abpixel = fb_plotters_ablend(abpixel,
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fb_16bpp_to_colour(*(pvideo + xloop)));
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}
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*(pvideo + xloop) = fb_colour_to_pixel(abpixel);
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}
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}
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pvideo += (framebuffer->linelen >> 1);
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}
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return true;
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}
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static bool fb_16bpp_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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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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/* now, draw to our target surface */
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if (bglyph->bitmap.pixel_mode == FT_PIXEL_MODE_MONO) {
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fb_16bpp_draw_ft_monobitmap(&bglyph->bitmap,
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x + bglyph->left,
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y - bglyph->top,
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c);
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} else {
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fb_16bpp_draw_ft_bitmap(&bglyph->bitmap,
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x + bglyph->left,
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y - bglyph->top,
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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 fb_16bpp_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 *font_data;
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int xloop, yloop;
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uint32_t row;
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size_t chr;
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uint16_t *pvideo;
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uint16_t fgcol;
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uint16_t bgcol;
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unsigned char *buffer = NULL;
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int x0,y0,x1,y1;
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int xoff, yoff; /* x and y offset into image */
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int height = fb_font->height;
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/* aquire thge text in local font encoding */
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utf8_to_font_encoding(fb_font, text, length, (char **)&buffer);
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if (!buffer)
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return true;
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length = strlen((char *)buffer);
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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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/* The part of the text displayed is cropped to the current context. */
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x0 = x;
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y0 = y;
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x1 = x + (fb_font->width * length);
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y1 = y + fb_font->height;
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if (!fb_plotters_clip_rect_ctx(&x0, &y0, &x1, &y1))
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return true; /* text lies outside current clipping region */
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/* find width and height to plot */
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if (height > (y1 - y0))
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height = (y1 - y0);
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xoff = x0 - x;
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yoff = y0 - y;
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fgcol = fb_colour_to_pixel(c);
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bgcol = fb_colour_to_pixel(bg);
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/*LOG(("x %d, y %d, style %p, txt %.*s , len %d, bg 0x%lx, fg 0x%lx",
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x,y,style,length,text,length,bg,c));*/
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for (chr = 0; chr < length; chr++, x += fb_font->width) {
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if ((x + fb_font->width) > x1)
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break;
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if (x < x0)
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continue;
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pvideo = fb_16bpp_get_xy_loc(x, y0);
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/* move our font-data to the correct position */
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font_data = fb_font->data + (buffer[chr] * fb_font->height);
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for (yloop = 0; yloop < height; yloop++) {
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row = font_data[yoff + yloop];
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for (xloop = fb_font->width; xloop > 0 ; xloop--) {
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if ((row & 1) != 0)
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*(pvideo + xloop) = fgcol;
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row = row >> 1;
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}
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pvideo += (framebuffer->linelen >> 1);
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}
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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 fb_16bpp_disc(int x, int y, int radius, colour c, bool filled)
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{
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LOG(("x %d, y %d, r %d, c 0x%lx, fill %d",
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x, y, radius, (unsigned long)c, filled));
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return true;
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}
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static bool fb_16bpp_arc(int x, int y, int radius, int angle1, int angle2,
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colour c)
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{
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LOG(("x %d, y %d, r %d, a1 %d, a2 %d, c 0x%lx",
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x, y, radius, angle1, angle2, (unsigned long)c));
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return true;
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}
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static bool fb_16bpp_bitmap(int x, int y, int width, int height,
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struct bitmap *bitmap, colour bg,
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struct content *content)
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{
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uint16_t *pvideo;
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colour *pixel = (colour *)bitmap->pixdata;
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colour abpixel; /* alphablended pixel */
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int xloop, yloop;
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int x0,y0,x1,y1;
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int xoff, yoff; /* x and y offset into image */
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/* LOG(("x %d, y %d, width %d, height %d, bitmap %p, content %p",
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x,y,width,height,bitmap,content));*/
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/* TODO here we should scale the image from bitmap->width to width, for
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* now simply crop.
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*/
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if (width > bitmap->width)
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width = bitmap->width;
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if (height > bitmap->height)
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height = bitmap->height;
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/* The part of the scaled image actually displayed is cropped to the
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* current context.
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*/
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x0 = x;
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y0 = y;
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x1 = x + width;
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y1 = y + height;
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if (!fb_plotters_clip_rect_ctx(&x0, &y0, &x1, &y1))
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return true;
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if (height > (y1 - y0))
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height = (y1 - y0);
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if (width > (x1 - x0))
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width = (x1 - x0);
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xoff = x0 - x;
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yoff = y0 - y;
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/* plot the image */
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pvideo = fb_16bpp_get_xy_loc(x0, y0);
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for (yloop = 0; yloop < height; yloop++) {
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for (xloop = 0; xloop < width; xloop++) {
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abpixel = pixel[((yoff + yloop) * bitmap->width) + xloop + xoff];
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if ((abpixel & 0xFF000000) != 0) {
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if ((abpixel & 0xFF000000) != 0xFF000000) {
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abpixel = fb_plotters_ablend(abpixel,
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fb_16bpp_to_colour(*(pvideo + xloop)));
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}
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*(pvideo + xloop) = fb_colour_to_pixel(abpixel);
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}
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}
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pvideo += (framebuffer->linelen >> 1);
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}
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return true;
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}
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static bool fb_16bpp_bitmap_tile(int x, int y, int width, int height,
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struct bitmap *bitmap, colour bg,
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bool repeat_x, bool repeat_y,
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struct content *content)
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{
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return fb_plotters_bitmap_tile(x, y, width, height,
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bitmap, bg, repeat_x, repeat_y,
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content, fb_16bpp_bitmap);
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}
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static bool fb_16bpp_flush(void)
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{
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LOG(("optional"));
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return true;
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}
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static bool fb_16bpp_path(const float *p, unsigned int n, colour fill, float width,
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colour c, const float transform[6])
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{
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LOG(("%f, %d, 0x%lx, %f, 0x%lx, %f",
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*p, n, (unsigned long)fill, width, (unsigned long)c, *transform));
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return true;
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}
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const struct plotter_table framebuffer_16bpp_plot = {
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.clg = fb_16bpp_clg,
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.rectangle = fb_16bpp_rectangle,
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.line = fb_16bpp_line,
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.polygon = fb_16bpp_polygon,
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.fill = fb_16bpp_fill,
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.clip = fb_clip,
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.text = fb_16bpp_text,
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.disc = fb_16bpp_disc,
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.arc = fb_16bpp_arc,
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.bitmap = fb_16bpp_bitmap,
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.bitmap_tile = fb_16bpp_bitmap_tile,
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.flush = fb_16bpp_flush,
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.path = fb_16bpp_path,
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.option_knockout = true,
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};
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/*
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* Local Variables:
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* c-basic-offset:8
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* End:
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*/
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