mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-11-22 22:41:30 +03:00
849 lines
25 KiB
C
849 lines
25 KiB
C
/*
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* Copyright 2006 Richard Wilson <info@tinct.net>
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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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/** \file
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* Knockout rendering (implementation).
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*
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* Knockout rendering is an optimisation which is particularly for
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* unaccelerated screen redraw. It tries to avoid plotting the same area more
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* than once.
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*
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* If the object is to plot two overlapping rectangles (one large, one small),
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* such as:
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*
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* +-----------------+
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* |#################|
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* |####+-------+####|
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* |####|:::::::|####|
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* |####|:::::::|####|
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* |####|:::::::|####|
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* |####+-------+####|
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* |#################|
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* +-----------------+
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*
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* Without knockout rendering we plot the bottom rectangle and then the top one:
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*
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* +-----------------+ +-----------------+
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* |#################| |#################|
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* |#################| |####+-------+####|
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* |#################| |####|:::::::|####|
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* |#################| and then, |####|:::::::|####|
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* |#################| |####|:::::::|####|
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* |#################| |####+-------+####|
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* |#################| |#################|
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* +-----------------+ +-----------------+
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*
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* With knockout rendering, the bottom rectangle is split up into smaller
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* ones and each pixel is just plotted once:
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*
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* +-----------------+
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* |#################|
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* +----+-------+----+
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* |####|:::::::|####|
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* |####|:::::::|####|
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* |####|:::::::|####|
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* +----+-------+----+
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* |#################|
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* +-----------------+
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*/
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#include <assert.h>
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#include <string.h>
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#include "desktop/knockout.h"
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#include "desktop/plotters.h"
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#include "image/bitmap.h"
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#define NDEBUG
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#include "utils/log.h"
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#undef NDEBUG
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#define KNOCKOUT_ENTRIES 3072 /* 40 bytes each */
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#define KNOCKOUT_BOXES 768 /* 28 bytes each */
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#define KNOCKOUT_POLYGONS 3072 /* 4 bytes each */
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struct knockout_box;
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struct knockout_entry;
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static void knockout_set_plotters(void);
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static void knockout_calculate(int x0, int y0, int x1, int y1, struct knockout_box *box);
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static bool knockout_plot_fill_recursive(struct knockout_box *box, plot_style_t *plot_style);
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static bool knockout_plot_bitmap_recursive(struct knockout_box *box,
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struct knockout_entry *entry);
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static bool knockout_plot_line(int x0, int y0, int x1, int y1, const plot_style_t *pstyle);
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static bool knockout_plot_polygon(const int *p, unsigned int n, const plot_style_t *pstyle);
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static bool knockout_plot_rectangle(int x0, int y0, int x1, int y1, const plot_style_t *plot_style);
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static bool knockout_plot_clip(int clip_x0, int clip_y0,
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int clip_x1, int clip_y1);
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static bool knockout_plot_text(int x, int y, const char *text, size_t length,
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const plot_font_style_t *fstyle);
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static bool knockout_plot_disc(int x, int y, int radius, const plot_style_t *pstyle);
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static bool knockout_plot_arc(int x, int y, int radius, int angle1, int angle2, const plot_style_t *pstyle);
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static bool knockout_plot_bitmap(int x, int y, 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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static bool knockout_plot_flush(void);
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static bool knockout_plot_group_start(const char *name);
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static bool knockout_plot_group_end(void);
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static bool knockout_plot_path(const float *p, unsigned int n, colour fill,
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float width, colour c, const float transform[6]);
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const struct plotter_table knockout_plotters = {
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.rectangle = knockout_plot_rectangle,
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.line = knockout_plot_line,
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.polygon = knockout_plot_polygon,
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.clip = knockout_plot_clip,
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.text = knockout_plot_text,
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.disc = knockout_plot_disc,
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.arc = knockout_plot_arc,
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.bitmap = knockout_plot_bitmap,
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.group_start = knockout_plot_group_start,
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.group_end = knockout_plot_group_end,
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.flush = knockout_plot_flush,
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.path = knockout_plot_path,
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.option_knockout = true,
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};
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typedef enum {
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KNOCKOUT_PLOT_RECTANGLE,
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KNOCKOUT_PLOT_LINE,
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KNOCKOUT_PLOT_POLYGON,
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KNOCKOUT_PLOT_FILL, /* knockout, knocked out */
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KNOCKOUT_PLOT_CLIP,
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KNOCKOUT_PLOT_TEXT,
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KNOCKOUT_PLOT_DISC,
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KNOCKOUT_PLOT_ARC,
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KNOCKOUT_PLOT_BITMAP, /* knockout, knocked out */
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KNOCKOUT_PLOT_GROUP_START,
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KNOCKOUT_PLOT_GROUP_END,
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} knockout_type;
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struct knockout_box {
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struct {
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int x0;
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int y0;
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int x1;
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int y1;
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} bbox;
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bool deleted; /* box has been deleted, ignore */
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struct knockout_box *child;
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struct knockout_box *next;
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};
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struct knockout_entry {
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knockout_type type;
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struct knockout_box *box; /* relating series of knockout clips */
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union {
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struct {
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int x0;
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int y0;
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int x1;
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int y1;
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plot_style_t plot_style;
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} rectangle;
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struct {
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int x0;
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int y0;
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int x1;
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int y1;
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plot_style_t plot_style;
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} line;
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struct {
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int *p;
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unsigned int n;
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plot_style_t plot_style;
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} polygon;
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struct {
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int x0;
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int y0;
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int x1;
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int y1;
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plot_style_t plot_style;
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} fill;
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struct {
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int x0;
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int y0;
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int x1;
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int y1;
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} clip;
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struct {
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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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plot_font_style_t font_style;
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} text;
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struct {
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int x;
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int y;
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int radius;
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plot_style_t plot_style;
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} disc;
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struct {
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int x;
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int y;
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int radius;
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int angle1;
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int angle2;
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plot_style_t plot_style;
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} arc;
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struct {
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int x;
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int y;
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int width;
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int height;
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struct bitmap *bitmap;
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colour bg;
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bitmap_flags_t flags;
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} bitmap;
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struct {
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const char *name;
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} group_start;
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} data;
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};
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static struct knockout_entry knockout_entries[KNOCKOUT_ENTRIES];
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static struct knockout_box knockout_boxes[KNOCKOUT_BOXES];
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static int knockout_polygons[KNOCKOUT_POLYGONS];
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static int knockout_entry_cur = 0;
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static int knockout_box_cur = 0;
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static int knockout_polygon_cur = 0;
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static struct knockout_box *knockout_list = NULL;
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static struct plotter_table real_plot;
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static int clip_x0_cur;
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static int clip_y0_cur;
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static int clip_x1_cur;
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static int clip_y1_cur;
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static int nested_depth = 0;
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/**
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* Start a knockout plotting session
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*
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* \param plotter the plotter to use
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* \return true on success, false otherwise
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*/
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bool knockout_plot_start(struct plotter_table *plotter)
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{
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/* check if we're recursing */
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if (nested_depth++ > 0) {
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/* we should already have the knockout renderer as default */
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assert(plotter->rectangle == knockout_plotters.rectangle);
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return true;
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}
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/* end any previous sessions */
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if (knockout_entry_cur > 0)
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knockout_plot_end();
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/* take over the plotter */
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real_plot = *plotter;
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knockout_set_plotters();
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return true;
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}
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/**
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* End a knockout plotting session
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*
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* \return true on success, false otherwise
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*/
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bool knockout_plot_end(void)
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{
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/* only output when we've finished any nesting */
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if (--nested_depth == 0)
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return knockout_plot_flush();
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assert(nested_depth > 0);
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return true;
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}
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/**
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* Flush the current knockout session to empty the buffers
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*
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* \return true on success, false otherwise
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*/
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bool knockout_plot_flush(void)
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{
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int i;
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bool success = true;
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struct knockout_box *box;
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/* debugging information */
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LOG(("Entries are %i/%i, %i/%i, %i/%i",
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knockout_entry_cur, KNOCKOUT_ENTRIES,
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knockout_box_cur, KNOCKOUT_BOXES,
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knockout_polygon_cur, KNOCKOUT_POLYGONS));
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/* release our plotter */
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plot = real_plot;
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for (i = 0; i < knockout_entry_cur; i++) {
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switch (knockout_entries[i].type) {
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case KNOCKOUT_PLOT_RECTANGLE:
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success &= plot.rectangle(
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knockout_entries[i].data.rectangle.x0,
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knockout_entries[i].data.rectangle.y0,
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knockout_entries[i].data.rectangle.x1,
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knockout_entries[i].data.rectangle.y1,
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&knockout_entries[i].data.rectangle.plot_style);
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break;
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case KNOCKOUT_PLOT_LINE:
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success &= plot.line(
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knockout_entries[i].data.line.x0,
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knockout_entries[i].data.line.y0,
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knockout_entries[i].data.line.x1,
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knockout_entries[i].data.line.y1,
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&knockout_entries[i].data.line.plot_style);
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break;
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case KNOCKOUT_PLOT_POLYGON:
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success &= plot.polygon(
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knockout_entries[i].data.polygon.p,
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knockout_entries[i].data.polygon.n,
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&knockout_entries[i].data.polygon.plot_style);
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break;
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case KNOCKOUT_PLOT_FILL:
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box = knockout_entries[i].box->child;
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if (box)
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success &= knockout_plot_fill_recursive(box,
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&knockout_entries[i].data.fill.plot_style);
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else if (!knockout_entries[i].box->deleted)
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success &= plot.rectangle(
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knockout_entries[i].data.fill.x0,
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knockout_entries[i].data.fill.y0,
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knockout_entries[i].data.fill.x1,
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knockout_entries[i].data.fill.y1,
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&knockout_entries[i].data.fill.plot_style);
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break;
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case KNOCKOUT_PLOT_CLIP:
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success &= plot.clip(
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knockout_entries[i].data.clip.x0,
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knockout_entries[i].data.clip.y0,
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knockout_entries[i].data.clip.x1,
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knockout_entries[i].data.clip.y1);
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break;
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case KNOCKOUT_PLOT_TEXT:
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success &= plot.text(
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knockout_entries[i].data.text.x,
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knockout_entries[i].data.text.y,
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knockout_entries[i].data.text.text,
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knockout_entries[i].data.text.length,
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&knockout_entries[i].data.text.font_style);
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break;
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case KNOCKOUT_PLOT_DISC:
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success &= plot.disc(
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knockout_entries[i].data.disc.x,
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knockout_entries[i].data.disc.y,
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knockout_entries[i].data.disc.radius,
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&knockout_entries[i].data.disc.plot_style);
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break;
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case KNOCKOUT_PLOT_ARC:
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success &= plot.arc(
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knockout_entries[i].data.arc.x,
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knockout_entries[i].data.arc.y,
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knockout_entries[i].data.arc.radius,
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knockout_entries[i].data.arc.angle1,
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knockout_entries[i].data.arc.angle2,
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&knockout_entries[i].data.arc.plot_style);
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break;
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case KNOCKOUT_PLOT_BITMAP:
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box = knockout_entries[i].box->child;
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if (box) {
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success &= knockout_plot_bitmap_recursive(box,
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&knockout_entries[i]);
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} else if (!knockout_entries[i].box->deleted) {
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success &= plot.bitmap(
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knockout_entries[i].data.
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bitmap.x,
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knockout_entries[i].data.
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bitmap.y,
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knockout_entries[i].data.
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bitmap.width,
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knockout_entries[i].data.
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bitmap.height,
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knockout_entries[i].data.
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bitmap.bitmap,
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knockout_entries[i].data.
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bitmap.bg,
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knockout_entries[i].data.
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bitmap.flags);
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}
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break;
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case KNOCKOUT_PLOT_GROUP_START:
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success &= plot.group_start(
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knockout_entries[i].data.group_start.name);
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break;
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case KNOCKOUT_PLOT_GROUP_END:
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success &= plot.group_end();
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break;
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}
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}
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knockout_entry_cur = 0;
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knockout_box_cur = 0;
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knockout_polygon_cur = 0;
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knockout_list = NULL;
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/* re-instate knockout plotters if we are still active */
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if (nested_depth > 0)
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knockout_set_plotters();
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return success;
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}
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/**
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* Override the current plotters with the knockout plotters
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*/
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void knockout_set_plotters(void)
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{
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plot = knockout_plotters;
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if (!real_plot.group_start)
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plot.group_start = NULL;
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if (!real_plot.group_end)
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plot.group_end = NULL;
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}
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/**
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* Knockout a section of previous rendering
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*
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* \param x0 the left edge of the removal box
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* \param y0 the bottom edge of the removal box
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* \param x1 the right edge of the removal box
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* \param y1 the top edge of the removal box
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* \param box the parent box set to consider, or NULL for top level
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*/
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void knockout_calculate(int x0, int y0, int x1, int y1, struct knockout_box *owner)
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{
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struct knockout_box *box;
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struct knockout_box *parent;
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struct knockout_box *prev = NULL;
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int nx0, ny0, nx1, ny1;
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if (owner == NULL)
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box = knockout_list;
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else
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box = owner->child;
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for (parent = box; parent; parent = parent->next) {
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/* permanently delink deleted nodes */
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if (parent->deleted) {
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if (prev) {
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/* not the first valid element: just skip future */
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prev->next = parent->next;
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} else {
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if (owner) {
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/* first valid element: update child reference */
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owner->child = parent->next;
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/* have we deleted all child nodes? */
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if (!owner->child)
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owner->deleted = true;
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} else {
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/* we are the head of the list */
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knockout_list = parent->next;
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}
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}
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continue;
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} else {
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prev = parent;
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}
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/* get the parent dimensions */
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nx0 = parent->bbox.x0;
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ny0 = parent->bbox.y0;
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nx1 = parent->bbox.x1;
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ny1 = parent->bbox.y1;
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/* reject non-overlapping boxes */
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if ((nx0 >= x1) || (nx1 <= x0) || (ny0 >= y1) || (ny1 <= y0))
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continue;
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/* check for a total knockout */
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if ((x0 <= nx0) && (x1 >= nx1) && (y0 <= ny0) && (y1 >= ny1)) {
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parent->deleted = true;
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continue;
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}
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/* has the box been replaced by children? */
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if (parent->child) {
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knockout_calculate(x0, y0, x1, y1, parent);
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} else {
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/* we need a maximum of 4 child boxes */
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if (knockout_box_cur + 4 >= KNOCKOUT_BOXES) {
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knockout_plot_flush();
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return;
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}
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/* clip top */
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if (y1 < ny1) {
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knockout_boxes[knockout_box_cur].bbox.x0 = nx0;
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knockout_boxes[knockout_box_cur].bbox.y0 = y1;
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knockout_boxes[knockout_box_cur].bbox.x1 = nx1;
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knockout_boxes[knockout_box_cur].bbox.y1 = ny1;
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knockout_boxes[knockout_box_cur].deleted = false;
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knockout_boxes[knockout_box_cur].child = NULL;
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knockout_boxes[knockout_box_cur].next = parent->child;
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parent->child = &knockout_boxes[knockout_box_cur++];
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ny1 = y1;
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}
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/* clip bottom */
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if (y0 > ny0) {
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knockout_boxes[knockout_box_cur].bbox.x0 = nx0;
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knockout_boxes[knockout_box_cur].bbox.y0 = ny0;
|
|
knockout_boxes[knockout_box_cur].bbox.x1 = nx1;
|
|
knockout_boxes[knockout_box_cur].bbox.y1 = y0;
|
|
knockout_boxes[knockout_box_cur].deleted = false;
|
|
knockout_boxes[knockout_box_cur].child = NULL;
|
|
knockout_boxes[knockout_box_cur].next = parent->child;
|
|
parent->child = &knockout_boxes[knockout_box_cur++];
|
|
ny0 = y0;
|
|
}
|
|
/* clip right */
|
|
if (x1 < nx1) {
|
|
knockout_boxes[knockout_box_cur].bbox.x0 = x1;
|
|
knockout_boxes[knockout_box_cur].bbox.y0 = ny0;
|
|
knockout_boxes[knockout_box_cur].bbox.x1 = nx1;
|
|
knockout_boxes[knockout_box_cur].bbox.y1 = ny1;
|
|
knockout_boxes[knockout_box_cur].deleted = false;
|
|
knockout_boxes[knockout_box_cur].child = NULL;
|
|
knockout_boxes[knockout_box_cur].next = parent->child;
|
|
parent->child = &knockout_boxes[knockout_box_cur++];
|
|
/* nx1 isn't used again, but if it was it would
|
|
* need to be updated to x1 here. */
|
|
}
|
|
/* clip left */
|
|
if (x0 > nx0) {
|
|
knockout_boxes[knockout_box_cur].bbox.x0 = nx0;
|
|
knockout_boxes[knockout_box_cur].bbox.y0 = ny0;
|
|
knockout_boxes[knockout_box_cur].bbox.x1 = x0;
|
|
knockout_boxes[knockout_box_cur].bbox.y1 = ny1;
|
|
knockout_boxes[knockout_box_cur].deleted = false;
|
|
knockout_boxes[knockout_box_cur].child = NULL;
|
|
knockout_boxes[knockout_box_cur].next = parent->child;
|
|
parent->child = &knockout_boxes[knockout_box_cur++];
|
|
/* nx0 isn't used again, but if it was it would
|
|
* need to be updated to x0 here. */
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
bool knockout_plot_fill_recursive(struct knockout_box *box, plot_style_t *plot_style)
|
|
{
|
|
bool success = true;
|
|
struct knockout_box *parent;
|
|
|
|
for (parent = box; parent; parent = parent->next) {
|
|
if (parent->deleted)
|
|
continue;
|
|
if (parent->child)
|
|
knockout_plot_fill_recursive(parent->child, plot_style);
|
|
else
|
|
success &= plot.rectangle(parent->bbox.x0,
|
|
parent->bbox.y0,
|
|
parent->bbox.x1,
|
|
parent->bbox.y1,
|
|
plot_style);
|
|
}
|
|
return success;
|
|
}
|
|
|
|
|
|
bool knockout_plot_bitmap_recursive(struct knockout_box *box,
|
|
struct knockout_entry *entry)
|
|
{
|
|
bool success = true;
|
|
struct knockout_box *parent;
|
|
|
|
for (parent = box; parent; parent = parent->next) {
|
|
if (parent->deleted)
|
|
continue;
|
|
if (parent->child)
|
|
knockout_plot_bitmap_recursive(parent->child, entry);
|
|
else {
|
|
success &= plot.clip(parent->bbox.x0,
|
|
parent->bbox.y0,
|
|
parent->bbox.x1,
|
|
parent->bbox.y1);
|
|
success &= plot.bitmap(entry->data.bitmap.x,
|
|
entry->data.bitmap.y,
|
|
entry->data.bitmap.width,
|
|
entry->data.bitmap.height,
|
|
entry->data.bitmap.bitmap,
|
|
entry->data.bitmap.bg,
|
|
entry->data.bitmap.flags);
|
|
}
|
|
}
|
|
return success;
|
|
}
|
|
|
|
bool knockout_plot_rectangle(int x0, int y0, int x1, int y1, const plot_style_t *pstyle)
|
|
{
|
|
int kx0, ky0, kx1, ky1;
|
|
|
|
if (pstyle->fill_type != PLOT_OP_TYPE_NONE) {
|
|
/* filled draw */
|
|
|
|
/* get our bounds */
|
|
kx0 = (x0 > clip_x0_cur) ? x0 : clip_x0_cur;
|
|
ky0 = (y0 > clip_y0_cur) ? y0 : clip_y0_cur;
|
|
kx1 = (x1 < clip_x1_cur) ? x1 : clip_x1_cur;
|
|
ky1 = (y1 < clip_y1_cur) ? y1 : clip_y1_cur;
|
|
if ((kx0 > clip_x1_cur) || (kx1 < clip_x0_cur) ||
|
|
(ky0 > clip_y1_cur) || (ky1 < clip_y0_cur))
|
|
return true;
|
|
|
|
/* fills both knock out and get knocked out */
|
|
knockout_calculate(kx0, ky0, kx1, ky1, NULL);
|
|
knockout_boxes[knockout_box_cur].bbox.x0 = x0;
|
|
knockout_boxes[knockout_box_cur].bbox.y0 = y0;
|
|
knockout_boxes[knockout_box_cur].bbox.x1 = x1;
|
|
knockout_boxes[knockout_box_cur].bbox.y1 = y1;
|
|
knockout_boxes[knockout_box_cur].deleted = false;
|
|
knockout_boxes[knockout_box_cur].child = NULL;
|
|
knockout_boxes[knockout_box_cur].next = knockout_list;
|
|
knockout_list = &knockout_boxes[knockout_box_cur];
|
|
knockout_entries[knockout_entry_cur].box = &knockout_boxes[knockout_box_cur];
|
|
knockout_entries[knockout_entry_cur].data.fill.x0 = x0;
|
|
knockout_entries[knockout_entry_cur].data.fill.y0 = y0;
|
|
knockout_entries[knockout_entry_cur].data.fill.x1 = x1;
|
|
knockout_entries[knockout_entry_cur].data.fill.y1 = y1;
|
|
knockout_entries[knockout_entry_cur].data.fill.plot_style = *pstyle;
|
|
knockout_entries[knockout_entry_cur].data.fill.plot_style.stroke_type = PLOT_OP_TYPE_NONE; /* ensure we only plot the fill */
|
|
knockout_entries[knockout_entry_cur].type = KNOCKOUT_PLOT_FILL;
|
|
if ((++knockout_entry_cur >= KNOCKOUT_ENTRIES) ||
|
|
(++knockout_box_cur >= KNOCKOUT_BOXES))
|
|
knockout_plot_flush();
|
|
}
|
|
|
|
if (pstyle->stroke_type != PLOT_OP_TYPE_NONE) {
|
|
/* draw outline */
|
|
|
|
knockout_entries[knockout_entry_cur].data.rectangle.x0 = x0;
|
|
knockout_entries[knockout_entry_cur].data.rectangle.y0 = y0;
|
|
knockout_entries[knockout_entry_cur].data.rectangle.x1 = x1;
|
|
knockout_entries[knockout_entry_cur].data.rectangle.y1 = y1;
|
|
knockout_entries[knockout_entry_cur].data.fill.plot_style = *pstyle;
|
|
knockout_entries[knockout_entry_cur].data.fill.plot_style.fill_type = PLOT_OP_TYPE_NONE; /* ensure we only plot the outline */
|
|
knockout_entries[knockout_entry_cur].type = KNOCKOUT_PLOT_RECTANGLE;
|
|
if (++knockout_entry_cur >= KNOCKOUT_ENTRIES)
|
|
knockout_plot_flush();
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool knockout_plot_line(int x0, int y0, int x1, int y1, const plot_style_t *pstyle)
|
|
{
|
|
knockout_entries[knockout_entry_cur].data.line.x0 = x0;
|
|
knockout_entries[knockout_entry_cur].data.line.y0 = y0;
|
|
knockout_entries[knockout_entry_cur].data.line.x1 = x1;
|
|
knockout_entries[knockout_entry_cur].data.line.y1 = y1;
|
|
knockout_entries[knockout_entry_cur].data.line.plot_style = *pstyle;
|
|
knockout_entries[knockout_entry_cur].type = KNOCKOUT_PLOT_LINE;
|
|
if (++knockout_entry_cur >= KNOCKOUT_ENTRIES)
|
|
knockout_plot_flush();
|
|
return true;
|
|
}
|
|
|
|
|
|
bool knockout_plot_polygon(const int *p, unsigned int n, const plot_style_t *pstyle)
|
|
{
|
|
bool success = true;
|
|
int *dest;
|
|
|
|
/* ensure we have sufficient room even when flushed */
|
|
if (n * 2 >= KNOCKOUT_POLYGONS) {
|
|
knockout_plot_flush();
|
|
success = real_plot.polygon(p, n, pstyle);
|
|
return success;
|
|
}
|
|
|
|
/* ensure we have enough room right now */
|
|
if (knockout_polygon_cur + n * 2 >= KNOCKOUT_POLYGONS)
|
|
knockout_plot_flush();
|
|
|
|
/* copy our data */
|
|
dest = &(knockout_polygons[knockout_polygon_cur]);
|
|
memcpy(dest, p, n * 2 * sizeof(int));
|
|
knockout_polygon_cur += n * 2;
|
|
knockout_entries[knockout_entry_cur].data.polygon.p = dest;
|
|
knockout_entries[knockout_entry_cur].data.polygon.n = n;
|
|
knockout_entries[knockout_entry_cur].data.polygon.plot_style = *pstyle;
|
|
knockout_entries[knockout_entry_cur].type = KNOCKOUT_PLOT_POLYGON;
|
|
if (++knockout_entry_cur >= KNOCKOUT_ENTRIES)
|
|
knockout_plot_flush();
|
|
return true;
|
|
}
|
|
|
|
|
|
bool knockout_plot_path(const float *p, unsigned int n, colour fill,
|
|
float width, colour c, const float transform[6])
|
|
{
|
|
knockout_plot_flush();
|
|
return real_plot.path(p, n, fill, width, c, transform);
|
|
}
|
|
|
|
|
|
bool knockout_plot_clip(int clip_x0, int clip_y0,
|
|
int clip_x1, int clip_y1)
|
|
{
|
|
if (clip_x1 < clip_x0 || clip_y0 > clip_y1) {
|
|
LOG(("bad clip rectangle %i %i %i %i",
|
|
clip_x0, clip_y0, clip_x1, clip_y1));
|
|
return false;
|
|
}
|
|
|
|
/* memorise clip for bitmap tiling */
|
|
clip_x0_cur = clip_x0;
|
|
clip_y0_cur = clip_y0;
|
|
clip_x1_cur = clip_x1;
|
|
clip_y1_cur = clip_y1;
|
|
|
|
knockout_entries[knockout_entry_cur].data.clip.x0 = clip_x0;
|
|
knockout_entries[knockout_entry_cur].data.clip.y0 = clip_y0;
|
|
knockout_entries[knockout_entry_cur].data.clip.x1 = clip_x1;
|
|
knockout_entries[knockout_entry_cur].data.clip.y1 = clip_y1;
|
|
knockout_entries[knockout_entry_cur].type = KNOCKOUT_PLOT_CLIP;
|
|
if (++knockout_entry_cur >= KNOCKOUT_ENTRIES)
|
|
knockout_plot_flush();
|
|
return true;
|
|
}
|
|
|
|
|
|
bool knockout_plot_text(int x, int y, const char *text, size_t length,
|
|
const plot_font_style_t *fstyle)
|
|
{
|
|
knockout_entries[knockout_entry_cur].data.text.x = x;
|
|
knockout_entries[knockout_entry_cur].data.text.y = y;
|
|
knockout_entries[knockout_entry_cur].data.text.text = text;
|
|
knockout_entries[knockout_entry_cur].data.text.length = length;
|
|
knockout_entries[knockout_entry_cur].data.text.font_style = *fstyle;
|
|
knockout_entries[knockout_entry_cur].type = KNOCKOUT_PLOT_TEXT;
|
|
if (++knockout_entry_cur >= KNOCKOUT_ENTRIES)
|
|
knockout_plot_flush();
|
|
return true;
|
|
}
|
|
|
|
|
|
bool knockout_plot_disc(int x, int y, int radius, const plot_style_t *pstyle)
|
|
{
|
|
knockout_entries[knockout_entry_cur].data.disc.x = x;
|
|
knockout_entries[knockout_entry_cur].data.disc.y = y;
|
|
knockout_entries[knockout_entry_cur].data.disc.radius = radius;
|
|
knockout_entries[knockout_entry_cur].data.disc.plot_style = *pstyle;
|
|
knockout_entries[knockout_entry_cur].type = KNOCKOUT_PLOT_DISC;
|
|
if (++knockout_entry_cur >= KNOCKOUT_ENTRIES)
|
|
knockout_plot_flush();
|
|
return true;
|
|
}
|
|
|
|
bool knockout_plot_arc(int x, int y, int radius, int angle1, int angle2, const plot_style_t *pstyle)
|
|
{
|
|
knockout_entries[knockout_entry_cur].data.arc.x = x;
|
|
knockout_entries[knockout_entry_cur].data.arc.y = y;
|
|
knockout_entries[knockout_entry_cur].data.arc.radius = radius;
|
|
knockout_entries[knockout_entry_cur].data.arc.angle1 = angle1;
|
|
knockout_entries[knockout_entry_cur].data.arc.angle2 = angle2;
|
|
knockout_entries[knockout_entry_cur].data.arc.plot_style = *pstyle;
|
|
knockout_entries[knockout_entry_cur].type = KNOCKOUT_PLOT_ARC;
|
|
if (++knockout_entry_cur >= KNOCKOUT_ENTRIES)
|
|
knockout_plot_flush();
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
bool knockout_plot_bitmap(int x, int y, int width, int height,
|
|
struct bitmap *bitmap, colour bg,
|
|
bitmap_flags_t flags)
|
|
{
|
|
int kx0, ky0, kx1, ky1;
|
|
|
|
/* get our bounds */
|
|
kx0 = clip_x0_cur;
|
|
ky0 = clip_y0_cur;
|
|
kx1 = clip_x1_cur;
|
|
ky1 = clip_y1_cur;
|
|
if (!(flags & BITMAPF_REPEAT_X)) {
|
|
if (x > kx0)
|
|
kx0 = x;
|
|
if (x + width < kx1)
|
|
kx1 = x + width;
|
|
if ((kx0 > clip_x1_cur) || (kx1 < clip_x0_cur))
|
|
return true;
|
|
}
|
|
if (!(flags & BITMAPF_REPEAT_Y)) {
|
|
if (y > ky0)
|
|
ky0 = y;
|
|
if (y + height < ky1)
|
|
ky1 = y + height;
|
|
if ((ky0 > clip_y1_cur) || (ky1 < clip_y0_cur))
|
|
return true;
|
|
}
|
|
|
|
/* tiled bitmaps both knock out and get knocked out */
|
|
if (bitmap_get_opaque(bitmap))
|
|
knockout_calculate(kx0, ky0, kx1, ky1, NULL);
|
|
knockout_boxes[knockout_box_cur].bbox.x0 = kx0;
|
|
knockout_boxes[knockout_box_cur].bbox.y0 = ky0;
|
|
knockout_boxes[knockout_box_cur].bbox.x1 = kx1;
|
|
knockout_boxes[knockout_box_cur].bbox.y1 = ky1;
|
|
knockout_boxes[knockout_box_cur].deleted = false;
|
|
knockout_boxes[knockout_box_cur].child = NULL;
|
|
knockout_boxes[knockout_box_cur].next = knockout_list;
|
|
knockout_list = &knockout_boxes[knockout_box_cur];
|
|
knockout_entries[knockout_entry_cur].box = &knockout_boxes[knockout_box_cur];
|
|
knockout_entries[knockout_entry_cur].data.bitmap.x = x;
|
|
knockout_entries[knockout_entry_cur].data.bitmap.y = y;
|
|
knockout_entries[knockout_entry_cur].data.bitmap.width = width;
|
|
knockout_entries[knockout_entry_cur].data.bitmap.height = height;
|
|
knockout_entries[knockout_entry_cur].data.bitmap.bitmap = bitmap;
|
|
knockout_entries[knockout_entry_cur].data.bitmap.bg = bg;
|
|
knockout_entries[knockout_entry_cur].data.bitmap.flags = flags;
|
|
knockout_entries[knockout_entry_cur].type = KNOCKOUT_PLOT_BITMAP;
|
|
if ((++knockout_entry_cur >= KNOCKOUT_ENTRIES) ||
|
|
(++knockout_box_cur >= KNOCKOUT_BOXES))
|
|
knockout_plot_flush();
|
|
return knockout_plot_clip(clip_x0_cur, clip_y0_cur, clip_x1_cur, clip_y1_cur);
|
|
}
|
|
|
|
bool knockout_plot_group_start(const char *name)
|
|
{
|
|
knockout_entries[knockout_entry_cur].data.group_start.name = name;
|
|
knockout_entries[knockout_entry_cur].type = KNOCKOUT_PLOT_GROUP_START;
|
|
if (++knockout_entry_cur >= KNOCKOUT_ENTRIES)
|
|
knockout_plot_flush();
|
|
return true;
|
|
}
|
|
|
|
bool knockout_plot_group_end(void)
|
|
{
|
|
knockout_entries[knockout_entry_cur].type = KNOCKOUT_PLOT_GROUP_END;
|
|
if (++knockout_entry_cur >= KNOCKOUT_ENTRIES)
|
|
knockout_plot_flush();
|
|
return true;
|
|
}
|