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/***************************************************************************
gb.draw.h
(c) 2000-2007 Benoit Minisini <gambas@users.sourceforge.net>
This program 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; either version 1, or (at your option)
any later version.
This program 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
***************************************************************************/
#ifndef __GB_DRAW_H
#define __GB_DRAW_H
#include "gb_common.h"
#include "gambas.h"
#define GB_DRAW_ALIGN_DEFAULT (-1)
typedef
struct _GB_MATRIX {
double m11, m12, m21, m22;
double dx, dy;
unsigned identity : 1;
unsigned rotation : 1;
struct _GB_MATRIX *next;
}
GB_MATRIX;
typedef
void *GB_FONT;
struct GB_DRAW_DESC;
typedef
struct GB_DRAW {
struct GB_DRAW_DESC *desc; // drawing driver
struct GB_DRAW *previous; // previous drawing context
void *device; // drawing object
int width; // device width in device coordinates
int height; // device height in device coordinates
int resolution; // device resolution in DPI
int xform; // if the matrix must be used
GB_MATRIX matrix; // transformation matrix (do not manage rotations)
GB_MATRIX *save; // transformation matrix stack
char extra[0]; // data driver-specific
}
PACKED
GB_DRAW;
typedef
struct GB_DRAW_DESC {
// Size of the GB_DRAW structure extra data
int size;
// Begins and terminates the drawing
int (*Begin)(GB_DRAW *d);
void (*End)(GB_DRAW *d);
// Default colors
int (*GetBackground)(GB_DRAW *d);
void (*SetBackground)(GB_DRAW *d, int color);
int (*GetForeground)(GB_DRAW *d);
void (*SetForeground)(GB_DRAW *d, int color);
// Default font
GB_FONT (*GetFont)(GB_DRAW *d);
void (*SetFont)(GB_DRAW *d, GB_FONT font);
// Drawing mode
int (*IsInverted)(GB_DRAW *d);
void (*SetInverted)(GB_DRAW *d, int inverted);
int (*IsTransparent)(GB_DRAW *d);
void (*SetTransparent)(GB_DRAW *d, int transparent);
// Line properties
struct {
int (*GetWidth)(GB_DRAW *d);
void (*SetWidth)(GB_DRAW *d, int width);
int (*GetStyle)(GB_DRAW *d);
void (*SetStyle)(GB_DRAW *d, int style);
}
Line;
// Fill properties
struct {
int (*GetColor)(GB_DRAW *d);
void (*SetColor)(GB_DRAW *d, int color);
int (*GetStyle)(GB_DRAW *d);
void (*SetStyle)(GB_DRAW *d, int style);
void (*GetOrigin)(GB_DRAW *d, int *x, int *y);
void (*SetOrigin)(GB_DRAW *d, int x, int y);
}
Fill;
// Drawing methods
struct {
void (*Rect)(GB_DRAW *d, int x, int y, int w, int h);
//void (*RoundRect)(GB_DRAW *d, int x, int y, int w, int h, double round);
void (*Ellipse)(GB_DRAW *d, int x, int y, int w, int h, double start, double end);
void (*Line)(GB_DRAW *d, int x1, int y1, int x2, int y2);
void (*Point)(GB_DRAW *d, int x, int y);
void (*Picture)(GB_DRAW *d, GB_PICTURE picture, int x, int y, int w, int h, int sx, int sy, int sw, int sh);
void (*Image)(GB_DRAW *d, GB_IMAGE image, int x, int y, int w, int h, int sx, int sy, int sw, int sh);
void (*TiledPicture)(GB_DRAW *d, GB_PICTURE picture, int x, int y, int w, int h);
void (*Text)(GB_DRAW *d, char *text, int len, int x, int y, int w, int h, int align);
void (*TextSize)(GB_DRAW *d, char *text, int len, int *w, int *h);
void (*Polyline)(GB_DRAW *d, int count, int *points);
void (*Polygon)(GB_DRAW *d, int count, int *points);
void (*RichText)(GB_DRAW *d, char *text, int len, int x, int y, int w, int h, int align);
void (*RichTextSize)(GB_DRAW *d, char *text, int len, int sw, int *w, int *h);
}
Draw;
// Clipping
struct {
void (*Get)(GB_DRAW *d, int *x, int *y, int *w, int *h);
void (*Set)(GB_DRAW *d, int x, int y, int w, int h);
int (*IsEnabled)(GB_DRAW *d);
void (*SetEnabled)(GB_DRAW *d, int enable);
}
Clip;
// Cairo drawing model? I must look at QT Arthur painting model first!
}
GB_DRAW_DESC;
#define DRAW_INTERFACE_VERSION 1
typedef
struct {
int version;
GB_DRAW *(*GetCurrent)();
void (*Begin)(void *);
void (*End)();
}
DRAW_INTERFACE;
#define DRAW_NORMALIZE(x, y, w, h, sx, sy, sw, sh, width, height) \
if (w < 0) w = width; \
if (h < 0) h = height; \
if (sw < 0) sw = width; \
if (sh < 0) sh = height; \
if (sx >= (width) || sy >= (height) || sw <= 0 || sh <= 0) \
return; \
if (sx < 0) x -= sx, sx = 0; \
if (sy < 0) y -= sy, sy = 0; \
if (sw > ((width) - sx)) \
sw = ((width) - sx); \
if (sh > ((height) - sy)) \
sh = ((height) - sy);
#endif
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