mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-12-12 15:27:16 +03:00
eddae6af06
svn path=/trunk/netsurf/; revision=12543
148 lines
5.4 KiB
C
148 lines
5.4 KiB
C
/*
|
|
* Copyright 2004 James Bursa <bursa@users.sourceforge.net>
|
|
*
|
|
* This file is part of NetSurf, http://www.netsurf-browser.org/
|
|
*
|
|
* NetSurf is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; version 2 of the License.
|
|
*
|
|
* NetSurf is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/** \file
|
|
* Target independent plotting (interface).
|
|
*/
|
|
|
|
#ifndef _NETSURF_DESKTOP_PLOTTERS_H_
|
|
#define _NETSURF_DESKTOP_PLOTTERS_H_
|
|
|
|
#include <stdbool.h>
|
|
#include "css/css.h"
|
|
#include "content/content.h"
|
|
#include "desktop/plot_style.h"
|
|
|
|
struct bitmap;
|
|
|
|
typedef unsigned long bitmap_flags_t;
|
|
#define BITMAPF_NONE 0
|
|
#define BITMAPF_REPEAT_X 1
|
|
#define BITMAPF_REPEAT_Y 2
|
|
|
|
|
|
/** Set of target specific plotting functions.
|
|
*
|
|
* The functions are:
|
|
* arc - Plots an arc, around (x,y), from anticlockwise from angle1 to
|
|
* angle2. Angles are measured anticlockwise from horizontal, in
|
|
* degrees.
|
|
* disc - Plots a circle, centered on (x,y), which is optionally filled.
|
|
* line - Plots a line from (x0,y0) to (x1,y1). Coordinates are at
|
|
* centre of line width/thickness.
|
|
* path - Plots a path consisting of cubic Bezier curves. Line colour is
|
|
* given by c and fill colour is given by fill.
|
|
* polygon - Plots a filled polygon with straight lines between points.
|
|
* The lines around the edge of the ploygon are not plotted. The
|
|
* polygon is filled with the non-zero winding rule.
|
|
* rectangle - Plots a rectangle outline. The line can be solid, dotted or
|
|
* dashed. Top left corner at (x0,y0) and rectangle has given
|
|
* width and height.
|
|
* fill - Plots a filled rectangle. Top left corner at (x0,y0), bottom
|
|
* right corner at (x1,y1). Note: (x0,y0) is inside filled area,
|
|
* but (x1,y1) is below and to the right. See diagram below.
|
|
* clip - Sets a clip rectangle for subsequent plots.
|
|
* text - Plots text. (x,y) is the coordinate of the left hand side of
|
|
* the text's baseline. The text is UTF-8 encoded. The colour, c,
|
|
* is the colour of the text. Background colour, bg, may be used
|
|
* optionally to attempt to provide anti-aliased text without
|
|
* screen reads. Font information is provided in the style.
|
|
* bitmap - Tiled plot of a bitmap image. (x,y) gives the top left
|
|
* coordinate of an explicitly placed tile. From this tile the
|
|
* image can repeat in all four directions -- up, down, left and
|
|
* right -- to the extents given by the current clip rectangle.
|
|
* The bitmap_flags say whether to tile in the x and y
|
|
* directions. If not tiling in x or y directions, the single
|
|
* image is plotted. The width and height give the dimensions
|
|
* the image is to be scaled to.
|
|
* group_start - Start of a group of objects. Used when plotter implements
|
|
* export to a vector graphics file format. (Optional.)
|
|
* group_end - End of the most recently started group. (Optional.)
|
|
* flush - Only used internally by the knockout code. Should be NULL in
|
|
* any front end display plotters or export plotters.
|
|
*
|
|
* Plotter options:
|
|
* option_knockout - Optimisation particularly for unaccelerated screen
|
|
* redraw. It tries to avoid plotting to the same area
|
|
* more than once. See desktop/knockout.c
|
|
*
|
|
* Coordinates are from top left of canvas and (0,0) is the top left grid
|
|
* denomination. If a "fill" is drawn from (0,0) to (4,3), the result is:
|
|
*
|
|
* 0 1 2 3 4 5
|
|
* +-+-+-+-+-+-
|
|
* 0 |#|#|#|#| |
|
|
* +-+-+-+-+-+-
|
|
* 1 |#|#|#|#| |
|
|
* +-+-+-+-+-+-
|
|
* 2 |#|#|#|#| |
|
|
* +-+-+-+-+-+-
|
|
* 3 | | | | | |
|
|
*/
|
|
struct plotter_table {
|
|
/* clipping operations */
|
|
bool (*clip)(const struct rect *clip);
|
|
|
|
/* shape primatives */
|
|
bool (*arc)(int x, int y, int radius, int angle1, int angle2, const plot_style_t *pstyle);
|
|
bool (*disc)(int x, int y, int radius, const plot_style_t *pstyle);
|
|
bool (*line)(int x0, int y0, int x1, int y1, const plot_style_t *pstyle);
|
|
bool (*rectangle)(int x0, int y0, int x1, int y1, const plot_style_t *pstyle);
|
|
bool (*polygon)(const int *p, unsigned int n, const plot_style_t *pstyle);
|
|
|
|
/* complex path (for SVG) */
|
|
bool (*path)(const float *p, unsigned int n, colour fill, float width,
|
|
colour c, const float transform[6]);
|
|
|
|
/* Image */
|
|
bool (*bitmap)(int x, int y, int width, int height,
|
|
struct bitmap *bitmap, colour bg,
|
|
bitmap_flags_t flags);
|
|
|
|
/**
|
|
* Text.
|
|
*
|
|
* \param x x coordinate
|
|
* \param y y coordinate
|
|
* \param text UTF-8 string to plot
|
|
* \param length length of string, in bytes
|
|
* \param fstyle plot style for this text
|
|
* \return true on success, false on error and error reported
|
|
*/
|
|
bool (*text)(int x, int y, const char *text, size_t length,
|
|
const plot_font_style_t *fstyle);
|
|
|
|
/* optional callbacks */
|
|
bool (*group_start)(const char *name); /**< optional, may be NULL */
|
|
bool (*group_end)(void); /**< optional, may be NULL */
|
|
bool (*flush)(void); /**< optional, may be NULL */
|
|
|
|
/* flags */
|
|
bool option_knockout; /**< set if knockout rendering is required */
|
|
};
|
|
|
|
enum path_command {
|
|
PLOTTER_PATH_MOVE,
|
|
PLOTTER_PATH_CLOSE,
|
|
PLOTTER_PATH_LINE,
|
|
PLOTTER_PATH_BEZIER,
|
|
};
|
|
|
|
|
|
#endif
|