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/*
* Draw.h -- Header for common drawing routines.
*
* Authors : Patrick Lecoanet.
* Creation date : Sat Dec 10 12:51:30 1994
*
* $Id$
*/
/*
* Copyright (c) 1993 - 1999 CENA, Patrick Lecoanet --
*
* This code is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This code 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this code; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#ifndef _Draw_h
#define _Draw_h
#include "List.h"
#include "Types.h"
#include "Color.h"
#include "Attrs.h"
#include "Image.h"
#define ZN_LINE_SHAPE_POINTS 4 /* Maximum of all *_SHAPE_POINTS */
struct _ZnWInfo;
#ifdef GL
#define ZnGlStartClip(num_clips, render) { \
if (!num_clips) { \
glEnable(GL_STENCIL_TEST); \
} \
glStencilFunc(GL_EQUAL, (GLint) num_clips, 0xFF); \
glStencilOp(GL_KEEP, GL_INCR, GL_INCR); \
if (!render) { \
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE); \
} \
}
#define ZnGlRenderClipped() { \
glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP); \
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); \
}
#define ZnGlRestoreStencil(num_clips, render) { \
glStencilFunc(GL_EQUAL, (GLint) (num_clips+1), 0xFF); \
glStencilOp(GL_KEEP, GL_DECR, GL_DECR); \
if (render) { \
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); \
} \
else { \
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE); \
} \
}
#define ZnGlEndClip(num_clips) { \
glStencilFunc(GL_EQUAL, (GLint) num_clips, 0xFF); \
glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP); \
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); \
if (!num_clips) { \
glDisable(GL_STENCIL_TEST); \
} \
}
#endif
void ZnSetLineStyle(struct _ZnWInfo *wi, ZnLineStyle line_style);
void ZnLineShapePoints(ZnPoint *p1, ZnPoint *p2, ZnDim line_width,
ZnLineShape shape, ZnBBox *bbox, ZnList to_points);
void ZnDrawLineShape(struct _ZnWInfo *wi, ZnPoint *points, unsigned int num_points,
ZnLineStyle line_style, int foreground_pixel,
ZnDim line_width, ZnLineShape shape);
void
ZnGetLineEnd(ZnPoint *p1, ZnPoint *p2, ZnDim line_width,
int cap_style, ZnLineEnd end_style, ZnPoint *points);
int ZnPolygonReliefInBBox(ZnPoint *points, unsigned int num_points,
ZnDim line_width, ZnBBox *bbox);
void ZnGetPolygonReliefBBox(ZnPoint *points, unsigned int num_points,
ZnDim line_width, ZnBBox *bbox);
double ZnPolygonReliefToPointDist(ZnPoint *points, unsigned int num_points,
ZnDim line_width, ZnPoint *pp);
void ZnDrawRectangleRelief(struct _ZnWInfo *wi,
ZnReliefStyle relief, ZnGradient *gradient,
XRectangle *bbox, ZnDim line_width);
void ZnDrawPolygonRelief(struct _ZnWInfo *wi, ZnReliefStyle relief,
ZnGradient *gradient, ZnPoint *points,
unsigned int num_points, ZnDim line_width);
#ifdef GL
void ZnRenderPolygonRelief(struct _ZnWInfo *wi, ZnReliefStyle relief,
ZnGradient *gradient, ZnBool smooth,
ZnPoint *points, unsigned int num_points, ZnDim line_width);
void ZnRenderPolyline(struct _ZnWInfo *wi, ZnPoint *points, unsigned int num_points,
ZnDim line_width, ZnLineStyle line_style, int cap_style,
int join_style, ZnLineEnd first_end, ZnLineEnd last_end,
ZnGradient *gradient);
void ZnComputeGradient(ZnGradient *grad, struct _ZnWInfo *wi, ZnPoly *shape,
ZnPoint *grad_geo);
void ZnRenderGradient(struct _ZnWInfo *wi, ZnGradient *gradient,
void (*cb)(void *), void *closure, ZnPoint *quad,
ZnPoly *poly);
void ZnRenderTile(struct _ZnWInfo *wi, ZnImage tile, ZnGradient *gradient,
void (*cb)(void *), void *closure, ZnPoint *quad);
void ZnRenderIcon(struct _ZnWInfo *wi, ZnImage image, ZnGradient *gradient,
ZnPoint *origin, ZnBool modulate);
void ZnRenderImage(struct _ZnWInfo *wi, ZnImage image, ZnGradient *gradient,
ZnPoint *quad, ZnBool modulate);
void RenderHollowDot(struct _ZnWInfo *wi, ZnPoint *p, ZnReal size);
void ZnRenderGlyph(ZnTexFontInfo *tfi, int c);
void ZnRenderString(ZnTexFontInfo *tfi, unsigned char *str, unsigned int len);
#endif
void ZnMapImage(XImage *image, XImage *mapped_image, ZnPoint *poly);
#endif /* _Draw_h */
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