Canvas callback interface device-dependent. 更多...
#include <gicanvas.h>
类 GiCanvas 继承关系图:
Public 类型 | |
| enum | { kLineDashMask = 0xFFF, kLineCapDefault = 0, kLineCapMask = 0x70000, kLineCapButt = 0x10000, kLineCapRound = 0x20000, kLineCapSquare = 0x40000, kAlignLeft = 0, kAlignCenter = 1, kAlignRight = 2, kAlignHorz = 0xF, kAlignTop = 0, kAlignBottom = 0x10, kAlignVCenter = 0x20, kAlignVert = 0xF0 } |
Public 成员函数 | |
| virtual | ~GiCanvas () |
| virtual void | setPen (int argb, float width, int style, float phase, float orgw)=0 |
| Set attributes of the current pen to stroke edges. 更多... | |
| virtual void | setBrush (int argb, int style)=0 |
| Set attributes of the current brush to fill shapes. 更多... | |
| virtual void | clearRect (float x, float y, float w, float h)=0 |
| Clear `rect' (that is, set the region within the rect to transparent). 更多... | |
| virtual void | drawRect (float x, float y, float w, float h, bool stroke, bool fill)=0 |
| Fill or stroke `rect' (w>0, h>0) with the current color. 更多... | |
| virtual void | drawLine (float x1, float y1, float x2, float y2)=0 |
| Stroke a line with the current color. 更多... | |
| virtual void | drawEllipse (float x, float y, float w, float h, bool stroke, bool fill)=0 |
| Fill or stroke a ellipse with a corner and size (w>0, h>0). 更多... | |
| virtual void | beginPath ()=0 |
| Start a new path. 更多... | |
| virtual void | moveTo (float x, float y)=0 |
| Ready to add a subpath to the current path at the start point. 更多... | |
| virtual void | lineTo (float x, float y)=0 |
| Add a line segment to the current subpath. 更多... | |
| virtual void | bezierTo (float c1x, float c1y, float c2x, float c2y, float x, float y)=0 |
| Add a cubic bezier segment to the current subpath. 更多... | |
| virtual void | quadTo (float cpx, float cpy, float x, float y)=0 |
| Add a quadratic bezier segment to the current subpath. 更多... | |
| virtual void | closePath ()=0 |
| Close the current subpath of the path added by beginPath(). 更多... | |
| virtual void | drawPath (bool stroke, bool fill)=0 |
| Draw and clear the current path added by beginPath(). 更多... | |
| virtual void | saveClip ()=0 |
| Save the current clipping path. 更多... | |
| virtual void | restoreClip ()=0 |
| Restore the current clipping path. 更多... | |
| virtual bool | clipRect (float x, float y, float w, float h)=0 |
| Intersect the current clipping path with `rect'. 更多... | |
| virtual bool | clipPath ()=0 |
| Intersect the current clipping path with the path added by beginPath(). 更多... | |
| virtual bool | drawHandle (float x, float y, int type, float angle)=0 |
| Draw a symbol (GiHandleTypes) whose center will at (x, y). 更多... | |
| virtual bool | drawBitmap (const char *name, float xc, float yc, float w, float h, float angle)=0 |
| Draw a image whose center will at (xc, yc). 更多... | |
| virtual float | drawTextAt (const char *text, float x, float y, float h, int align, float angle)=0 |
| Draw text in one line. 更多... | |
| virtual float | drawTextAt (GiTextWidthCallback *c, const char *text, float x, float y, float h, int align, float angle) |
| virtual void | clearCachedBitmap (bool clearAll=false) |
| Clear the cached bitmap for re-drawing on desktop PC. 更多... | |
| virtual bool | beginShape (int type, int sid, int version, float x, float y, float w, float h) |
| Ready to draw a shape. 更多... | |
| virtual void | endShape (int type, int sid, float x, float y) |
| Complete to draw a shape. 更多... | |
详细描述
Canvas callback interface device-dependent.
Implement a derived class with a graphics library which may be device-dependent. The default unit of its drawing functions is the point (usually equal to the pixel). The default drawing attributes (may be assigned in its beginPaint function) are: 1px black pen, solid line, round end caps, not fill.
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