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656 lines
16 KiB
656 lines
16 KiB
/*
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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_event.h>
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#include <libnsfb_cursor.h>
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#include "utils/utils.h"
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#include "utils/log.h"
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#include "utils/utf8.h"
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#include "netsurf/browser_window.h"
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#include "netsurf/plotters.h"
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#include "netsurf/bitmap.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/font.h"
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#include "framebuffer/bitmap.h"
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/* netsurf framebuffer library handle */
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static nsfb_t *nsfb;
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/**
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* \brief Sets a clip rectangle for subsequent plot operations.
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*
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* \param ctx The current redraw context.
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* \param clip The rectangle to limit all subsequent plot
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* operations within.
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* \return NSERROR_OK on success else error code.
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*/
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static nserror
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framebuffer_plot_clip(const struct redraw_context *ctx, const struct rect *clip)
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{
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nsfb_bbox_t nsfb_clip;
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nsfb_clip.x0 = clip->x0;
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nsfb_clip.y0 = clip->y0;
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nsfb_clip.x1 = clip->x1;
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nsfb_clip.y1 = clip->y1;
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if (!nsfb_plot_set_clip(nsfb, &nsfb_clip)) {
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return NSERROR_INVALID;
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}
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return NSERROR_OK;
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}
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/**
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* Plots an arc
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*
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* plot an arc segment around (x,y), anticlockwise from angle1
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* to angle2. Angles are measured anticlockwise from
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* horizontal, in degrees.
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*
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* \param ctx The current redraw context.
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* \param style Style controlling the arc plot.
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* \param x The x coordinate of the arc.
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* \param y The y coordinate of the arc.
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* \param radius The radius of the arc.
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* \param angle1 The start angle of the arc.
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* \param angle2 The finish angle of the arc.
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* \return NSERROR_OK on success else error code.
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*/
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static nserror
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framebuffer_plot_arc(const struct redraw_context *ctx,
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const plot_style_t *style,
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int x, int y, int radius, int angle1, int angle2)
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{
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if (!nsfb_plot_arc(nsfb, x, y, radius, angle1, angle2, style->fill_colour)) {
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return NSERROR_INVALID;
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}
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return NSERROR_OK;
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}
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/**
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* Plots a circle
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*
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* Plot a circle centered on (x,y), which is optionally filled.
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*
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* \param ctx The current redraw context.
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* \param style Style controlling the circle plot.
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* \param x x coordinate of circle centre.
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* \param y y coordinate of circle centre.
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* \param radius circle radius.
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* \return NSERROR_OK on success else error code.
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*/
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static nserror
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framebuffer_plot_disc(const struct redraw_context *ctx,
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const plot_style_t *style,
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int x, int y, int radius)
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{
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nsfb_bbox_t ellipse;
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ellipse.x0 = x - radius;
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ellipse.y0 = y - radius;
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ellipse.x1 = x + radius;
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ellipse.y1 = y + radius;
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if (style->fill_type != PLOT_OP_TYPE_NONE) {
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nsfb_plot_ellipse_fill(nsfb, &ellipse, style->fill_colour);
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}
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if (style->stroke_type != PLOT_OP_TYPE_NONE) {
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nsfb_plot_ellipse(nsfb, &ellipse, style->stroke_colour);
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}
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return NSERROR_OK;
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}
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/**
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* Plots a line
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*
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* plot a line from (x0,y0) to (x1,y1). Coordinates are at
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* centre of line width/thickness.
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*
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* \param ctx The current redraw context.
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* \param style Style controlling the line plot.
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* \param line A rectangle defining the line to be drawn
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* \return NSERROR_OK on success else error code.
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*/
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static nserror
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framebuffer_plot_line(const struct redraw_context *ctx,
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const plot_style_t *style,
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const struct rect *line)
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{
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nsfb_bbox_t rect;
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nsfb_plot_pen_t pen;
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rect.x0 = line->x0;
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rect.y0 = line->y0;
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rect.x1 = line->x1;
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rect.y1 = line->y1;
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if (style->stroke_type != PLOT_OP_TYPE_NONE) {
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if (style->stroke_type == PLOT_OP_TYPE_DOT) {
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pen.stroke_type = NFSB_PLOT_OPTYPE_PATTERN;
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pen.stroke_pattern = 0xAAAAAAAA;
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} else if (style->stroke_type == PLOT_OP_TYPE_DASH) {
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pen.stroke_type = NFSB_PLOT_OPTYPE_PATTERN;
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pen.stroke_pattern = 0xF0F0F0F0;
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} else {
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pen.stroke_type = NFSB_PLOT_OPTYPE_SOLID;
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}
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pen.stroke_colour = style->stroke_colour;
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pen.stroke_width = plot_style_fixed_to_int(style->stroke_width);
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nsfb_plot_line(nsfb, &rect, &pen);
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}
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return NSERROR_OK;
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}
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/**
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* Plots a rectangle.
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*
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* The rectangle can be filled an outline or both controlled
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* by the plot style The line can be solid, dotted or
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* dashed. Top left corner at (x0,y0) and rectangle has given
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* width and height.
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*
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* \param ctx The current redraw context.
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* \param style Style controlling the rectangle plot.
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* \param nsrect A rectangle defining the line to be drawn
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* \return NSERROR_OK on success else error code.
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*/
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static nserror
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framebuffer_plot_rectangle(const struct redraw_context *ctx,
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const plot_style_t *style,
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const struct rect *nsrect)
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{
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nsfb_bbox_t rect;
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bool dotted = false;
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bool dashed = false;
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rect.x0 = nsrect->x0;
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rect.y0 = nsrect->y0;
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rect.x1 = nsrect->x1;
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rect.y1 = nsrect->y1;
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if (style->fill_type != PLOT_OP_TYPE_NONE) {
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nsfb_plot_rectangle_fill(nsfb, &rect, style->fill_colour);
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}
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if (style->stroke_type != PLOT_OP_TYPE_NONE) {
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if (style->stroke_type == PLOT_OP_TYPE_DOT) {
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dotted = true;
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}
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if (style->stroke_type == PLOT_OP_TYPE_DASH) {
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dashed = true;
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}
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nsfb_plot_rectangle(nsfb, &rect,
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plot_style_fixed_to_int(style->stroke_width),
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style->stroke_colour, dotted, dashed);
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}
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return NSERROR_OK;
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}
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/**
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* Plot a polygon
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*
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* Plots a filled polygon with straight lines between
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* points. The lines around the edge of the ploygon are not
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* plotted. The polygon is filled with the non-zero winding
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* rule.
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*
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* \param ctx The current redraw context.
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* \param style Style controlling the polygon plot.
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* \param p verticies of polygon
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* \param n number of verticies.
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* \return NSERROR_OK on success else error code.
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*/
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static nserror
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framebuffer_plot_polygon(const struct redraw_context *ctx,
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const plot_style_t *style,
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const int *p,
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unsigned int n)
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{
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if (!nsfb_plot_polygon(nsfb, p, n, style->fill_colour)) {
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return NSERROR_INVALID;
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}
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return NSERROR_OK;
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}
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/**
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* Plots a path.
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*
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* Path plot consisting of cubic Bezier curves. Line and fill colour is
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* controlled by the plot style.
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*
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* \param ctx The current redraw context.
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* \param pstyle Style controlling the path plot.
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* \param p elements of path
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* \param n nunber of elements on path
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* \param transform A transform to apply to the path.
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* \return NSERROR_OK on success else error code.
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*/
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static nserror
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framebuffer_plot_path(const struct redraw_context *ctx,
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const plot_style_t *pstyle,
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const float *p,
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unsigned int n,
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const float transform[6])
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{
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NSLOG(netsurf, INFO, "path unimplemented");
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return NSERROR_OK;
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}
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/**
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* Plot a bitmap
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*
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* Tiled plot of a bitmap image. (x,y) gives the top left
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* coordinate of an explicitly placed tile. From this tile the
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* image can repeat in all four directions -- up, down, left
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* and right -- to the extents given by the current clip
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* rectangle.
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*
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* The bitmap_flags say whether to tile in the x and y
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* directions. If not tiling in x or y directions, the single
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* image is plotted. The width and height give the dimensions
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* the image is to be scaled to.
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*
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* \param ctx The current redraw context.
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* \param bitmap The bitmap to plot
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* \param x The x coordinate to plot the bitmap
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* \param y The y coordiante to plot the bitmap
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* \param width The width of area to plot the bitmap into
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* \param height The height of area to plot the bitmap into
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* \param bg the background colour to alpha blend into
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* \param flags the flags controlling the type of plot operation
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* \return NSERROR_OK on success else error code.
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*/
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static nserror
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framebuffer_plot_bitmap(const struct redraw_context *ctx,
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struct bitmap *bitmap,
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int x, int y,
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int width,
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int height,
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colour bg,
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bitmap_flags_t flags)
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{
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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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int bmwidth;
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int bmheight;
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int bmstride;
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enum nsfb_format_e bmformat;
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unsigned char *bmptr;
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nsfb_t *bm = (nsfb_t *)bitmap;
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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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if (!nsfb_plot_copy(bm, NULL, nsfb, &loc)) {
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return NSERROR_INVALID;
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}
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return NSERROR_OK;
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}
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nsfb_plot_get_clip(nsfb, &clipbox);
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nsfb_get_geometry(bm, &bmwidth, &bmheight, &bmformat);
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nsfb_get_buffer(bm, &bmptr, &bmstride);
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/* Optimise tiled plots of 1x1 bitmaps by replacing with a flat fill
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* of the area. Can only be done when image is fully opaque. */
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if ((bmwidth == 1) && (bmheight == 1)) {
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if ((*(nsfb_colour_t *)bmptr & 0xff000000) != 0) {
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if (!nsfb_plot_rectangle_fill(nsfb, &clipbox,
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*(nsfb_colour_t *)bmptr)) {
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return NSERROR_INVALID;
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}
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return NSERROR_OK;
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}
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}
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/* Optimise tiled plots of bitmaps scaled to 1x1 by replacing with
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* a flat fill of the area. Can only be done when image is fully
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* opaque. */
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if ((width == 1) && (height == 1)) {
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if (framebuffer_bitmap_get_opaque(bm)) {
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/** TODO: Currently using top left pixel. Maybe centre
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* pixel or average value would be better. */
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if (!nsfb_plot_rectangle_fill(nsfb, &clipbox,
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*(nsfb_colour_t *)bmptr)) {
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return NSERROR_INVALID;
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}
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return NSERROR_OK;
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}
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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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}
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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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}
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/* set up top left tile location */
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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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/* plot tiling across and down to extents */
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nsfb_plot_bitmap_tiles(nsfb, &loc,
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repeat_x ? ((clipbox.x1 - x) + width - 1) / width : 1,
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repeat_y ? ((clipbox.y1 - y) + height - 1) / height : 1,
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(nsfb_colour_t *)bmptr, bmwidth, bmheight,
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bmstride * 8 / 32, bmformat == NSFB_FMT_ABGR8888);
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return NSERROR_OK;
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}
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#ifdef FB_USE_FREETYPE
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/**
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* Text plotting.
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*
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* \param ctx The current redraw context.
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* \param fstyle plot style for this text
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* \param x x coordinate
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* \param y y coordinate
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* \param text UTF-8 string to plot
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* \param length length of string, in bytes
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* \return NSERROR_OK on success else error code.
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*/
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static nserror
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framebuffer_plot_text(const struct redraw_context *ctx,
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const struct plot_font_style *fstyle,
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int x,
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int y,
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const char *text,
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size_t length)
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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(fstyle, 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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fstyle->foreground);
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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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fstyle->foreground);
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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 NSERROR_OK;
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}
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#else
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/**
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* Text plotting.
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*
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* \param ctx The current redraw context.
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* \param fstyle plot style for this text
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* \param x x coordinate
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* \param y y coordinate
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* \param text UTF-8 string to plot
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* \param length length of string, in bytes
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* \return NSERROR_OK on success else error code.
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*/
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static nserror
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framebuffer_plot_text(const struct redraw_context *ctx,
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const struct plot_font_style *fstyle,
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int x,
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int y,
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const char *text,
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size_t length)
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{
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enum fb_font_style style = fb_get_font_style(fstyle);
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int size = fb_get_font_size(fstyle);
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const uint8_t *chrp;
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size_t nxtchr = 0;
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nsfb_bbox_t loc;
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uint32_t ucs4;
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int p = FB_FONT_PITCH * size;
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int w = FB_FONT_WIDTH * size;
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int h = FB_FONT_HEIGHT * size;
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y -= ((h * 3) / 4);
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/* 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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y += 1;
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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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if (!codepoint_displayable(ucs4))
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continue;
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loc.x0 = x;
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loc.y0 = y;
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loc.x1 = loc.x0 + w;
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loc.y1 = loc.y0 + h;
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chrp = fb_get_glyph(ucs4, style, size);
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nsfb_plot_glyph1(nsfb, &loc, chrp, p, fstyle->foreground);
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x += w;
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}
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return NSERROR_OK;
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}
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#endif
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|
|
/** framebuffer plot operation table */
|
|
const struct plotter_table fb_plotters = {
|
|
.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,
|
|
};
|
|
|
|
|
|
static bool framebuffer_format_from_bpp(int bpp, enum nsfb_format_e *fmt)
|
|
{
|
|
switch (bpp) {
|
|
case 32:
|
|
*fmt = NSFB_FMT_XRGB8888;
|
|
break;
|
|
|
|
case 24:
|
|
*fmt = NSFB_FMT_RGB888;
|
|
break;
|
|
|
|
case 16:
|
|
*fmt = NSFB_FMT_RGB565;
|
|
break;
|
|
|
|
case 8:
|
|
*fmt = NSFB_FMT_I8;
|
|
break;
|
|
|
|
case 4:
|
|
*fmt = NSFB_FMT_I4;
|
|
break;
|
|
|
|
case 1:
|
|
*fmt = NSFB_FMT_I1;
|
|
break;
|
|
|
|
default:
|
|
NSLOG(netsurf, INFO, "Bad bits per pixel (%d)\n", bpp);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
nsfb_t *
|
|
framebuffer_initialise(const char *fename, int width, int height, int bpp)
|
|
{
|
|
enum nsfb_type_e fbtype;
|
|
enum nsfb_format_e fbfmt;
|
|
|
|
/* bpp is a proxy for the framebuffer format */
|
|
if (framebuffer_format_from_bpp(bpp, &fbfmt) == false) {
|
|
return NULL;
|
|
}
|
|
|
|
fbtype = nsfb_type_from_name(fename);
|
|
if (fbtype == NSFB_SURFACE_NONE) {
|
|
NSLOG(netsurf, INFO,
|
|
"The %s surface is not available from libnsfb\n", fename);
|
|
return NULL;
|
|
}
|
|
|
|
nsfb = nsfb_new(fbtype);
|
|
if (nsfb == NULL) {
|
|
NSLOG(netsurf, INFO, "Unable to create %s fb surface\n", fename);
|
|
return NULL;
|
|
}
|
|
|
|
if (nsfb_set_geometry(nsfb, width, height, fbfmt) == -1) {
|
|
NSLOG(netsurf, INFO, "Unable to set surface geometry\n");
|
|
nsfb_free(nsfb);
|
|
return NULL;
|
|
}
|
|
|
|
nsfb_cursor_init(nsfb);
|
|
|
|
if (nsfb_init(nsfb) == -1) {
|
|
NSLOG(netsurf, INFO, "Unable to initialise nsfb surface\n");
|
|
nsfb_free(nsfb);
|
|
return NULL;
|
|
}
|
|
|
|
return nsfb;
|
|
|
|
}
|
|
|
|
bool
|
|
framebuffer_resize(nsfb_t *nsfb, int width, int height, int bpp)
|
|
{
|
|
enum nsfb_format_e fbfmt;
|
|
|
|
/* bpp is a proxy for the framebuffer format */
|
|
if (framebuffer_format_from_bpp(bpp, &fbfmt) == false) {
|
|
return false;
|
|
}
|
|
|
|
if (nsfb_set_geometry(nsfb, width, height, fbfmt) == -1) {
|
|
NSLOG(netsurf, INFO, "Unable to change surface geometry\n");
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
void
|
|
framebuffer_finalise(void)
|
|
{
|
|
nsfb_free(nsfb);
|
|
}
|
|
|
|
bool
|
|
framebuffer_set_cursor(struct fbtk_bitmap *bm)
|
|
{
|
|
return nsfb_cursor_set(nsfb, (nsfb_colour_t *)bm->pixdata, bm->width, bm->height, bm->width, bm->hot_x, bm->hot_y);
|
|
}
|
|
|
|
nsfb_t *framebuffer_set_surface(nsfb_t *new_nsfb)
|
|
{
|
|
nsfb_t *old_nsfb;
|
|
old_nsfb = nsfb;
|
|
nsfb = new_nsfb;
|
|
return old_nsfb;
|
|
}
|