/* * Canvas - an area for drawing */ /* * Copyright (c) 1991 Stanford University * Copyright (c) 1991 Silicon Graphics, Inc. * * Permission to use, copy, modify, distribute, and sell this software and * its documentation for any purpose is hereby granted without fee, provided * that (i) the above copyright notices and this permission notice appear in * all copies of the software and related documentation, and (ii) the names of * Stanford and Silicon Graphics may not be used in any advertising or * publicity relating to the software without the specific, prior written * permission of Stanford and Silicon Graphics. * * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. * * IN NO EVENT SHALL STANFORD OR SILICON GRAPHICS BE LIABLE FOR * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE * OF THIS SOFTWARE. */ // ============================================================================ // // 1.5 // 1999/01/19 14:25:06 // // Changes for InterViews Port to the Windows 3.1/NT operating systems // Copyright (c) 1993 Tim Prinzing // // Permission to use, copy, modify, distribute, and sell this software and // its documentation for any purpose is hereby granted without fee, provided // that (i) the above copyright notice and this permission notice appear in // all copies of the software and related documentation, and (ii) the name of // Tim Prinzing may not be used in any advertising or publicity relating to // the software without the specific, prior written permission of Tim Prinzing. // // THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, // EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY // WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. // // IN NO EVENT SHALL Tim Prinzing BE LIABLE FOR ANY SPECIAL, INCIDENTAL, // INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER // RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER OR NOT ADVISED OF THE // POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF LIABILITY, ARISING OUT OF OR // IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. // // ============================================================================ #ifndef iv_canvas_h #define iv_canvas_h #include <InterViews/geometry.h> #include <InterViews/_enter.h> class Bitmap; class Brush; class CanvasRep; class Color; class Extension; class Font; class Raster; class Transformer; class Window; #if !defined(WIN32) && !MAC /* anachronism */ typedef unsigned int CanvasLocation; class Canvas { public: Canvas(); virtual ~Canvas(); virtual Window* window() const; // Returns the window associated with this canvas, if this canvas // is bound to a window. A null pointer will be returned if this // canvas is not bound to a window. virtual void size(Coord width, Coord height); virtual void psize(PixelCoord width, PixelCoord height); virtual Coord width() const; virtual Coord height() const; virtual PixelCoord pwidth() const; virtual PixelCoord pheight() const; // width() and height() return the size of the canvas in terms of // printer points. The pwidth() and pheight() functions return the // size of the canvas in terms of pixels. virtual PixelCoord to_pixels(Coord, DimensionName d=Dimension_X) const; virtual Coord to_coord(PixelCoord, DimensionName d=Dimension_X) const; virtual Coord to_pixels_coord(Coord, DimensionName d=Dimension_X) const; // device/world coordinate system conversions. The to_pixels() // function converts printer points to pixels, and the to_coord() // function converts pixels to printer points. The dimension argument // is an extension of the InterViews 3.1 distribution which doesn't // distinguish between the X and Y dimensions. The dimension defaults // to the x dimension to provide backward compatibility (although // potentially incorrect behavior). virtual void new_path(); virtual void move_to(Coord x, Coord y); virtual void line_to(Coord x, Coord y); virtual void curve_to( Coord x, Coord y, Coord x1, Coord y1, Coord x2, Coord y2 ); virtual void close_path(); virtual void stroke(const Color*, const Brush*); virtual void line( Coord x1, Coord y1, Coord x2, Coord y2, const Color*, const Brush* ); virtual void rect( Coord l, Coord b, Coord r, Coord t, const Color*, const Brush* ); virtual void fill(const Color*); virtual void fill_rect(Coord l, Coord b, Coord r, Coord t, const Color*); virtual void character( const Font*, long ch, Coord width, const Color*, Coord x, Coord y ); virtual void stencil(const Bitmap*, const Color*, Coord x, Coord y); virtual void image(const Raster*, Coord x, Coord y); // stencil() stencils the bitmap foreground bits (those set to 1) // on the rendering surface in the given color at the given location. // The bitmap acts as a mask for the operation, as well as the source // of data. // // image() transfers a Raster (color bitmap) to the canvas surface // at the given location. // virtual void push_transform(); virtual void transform(const Transformer&); virtual void pop_transform(); virtual void transformer(const Transformer&); virtual const Transformer& transformer() const; virtual void push_clipping(); virtual void clip(); virtual void clip_rect(Coord l, Coord b, Coord r, Coord t); virtual void pop_clipping(); virtual void damage(const Extension&); virtual void damage(Coord left, Coord bottom, Coord right, Coord top); virtual boolean damaged(const Extension&) const; virtual boolean damaged( Coord left, Coord bottom, Coord right, Coord top ) const; virtual void damage_area(Extension&); virtual void damage_all(); virtual boolean any_damage() const; virtual void restrict_damage(const Extension&); virtual void restrict_damage( Coord left, Coord bottom, Coord right, Coord top ); virtual void front_buffer(); virtual void back_buffer(); // These functions are for canvases that are bound to a window. If // the canvas is not bound to a window, these functions will have // no effect. The front_buffer() function switches the window into // immediate-mode rendering and will render directly to the window // without double-buffering (and allows rendering outside of the // Glyph::draw() function. This is typically used for things like // rubber-banding. The back_buffer() function switchs out of // immediate-mode and back to being double-buffered if double // buffering is being done. virtual void redraw(Coord left, Coord bottom, Coord right, Coord top); virtual void repair(); CanvasRep* rep() const; private: CanvasRep* rep_; /* anachronisms */ public: enum { mapped, unmapped, offscreen }; virtual CanvasLocation status() const; unsigned int Width() const; unsigned int Height() const; virtual void SetBackground(const Color*); }; inline CanvasRep* Canvas::rep() const { return rep_; } #else // for mswindows and mac this is pure virtual base class class Canvas { public: Canvas(); virtual ~Canvas(); virtual Window* window() const; // Returns the window associated with this canvas, if this canvas // is bound to a window. A null pointer will be returned if this // canvas is not bound to a window. virtual void size(Coord width, Coord height) = 0; virtual void psize(PixelCoord width, PixelCoord height) = 0; virtual Coord width() const = 0; virtual Coord height() const = 0; virtual PixelCoord pwidth() const = 0; virtual PixelCoord pheight() const = 0; // width() and height() return the size of the canvas in terms of // printer points. The pwidth() and pheight() functions return the // size of the canvas in terms of pixels. virtual PixelCoord to_pixels(Coord, DimensionName d=Dimension_X) const = 0; virtual Coord to_coord(PixelCoord, DimensionName d=Dimension_X) const = 0; virtual Coord to_pixels_coord(Coord, DimensionName d=Dimension_X) const; // device/world coordinate system conversions. The to_pixels() // function converts printer points to pixels, and the to_coord() // function converts pixels to printer points. The dimension argument // is an extension of the InterViews 3.1 distribution which doesn't // distinguish between the X and Y dimensions. The dimension defaults // to the x dimension to provide backward compatibility (although // potentially incorrect behavior). virtual void new_path() = 0; virtual void move_to(Coord x, Coord y) = 0; virtual void line_to(Coord x, Coord y) = 0; virtual void curve_to( Coord x, Coord y, Coord x1, Coord y1, Coord x2, Coord y2 ) = 0; virtual void close_path() = 0; virtual void ellipse_path(Coord x, Coord y, Coord rx, Coord ry); // This function creates a new path that represents an ellipse // shape that can be used to stroke, fill, clip, etc. The x and // y coordinates are the center. The coordinates rx and ry are // the radius in the x and y dimensions respectively. virtual void stroke(const Color*, const Brush*) = 0; virtual void line( Coord x1, Coord y1, Coord x2, Coord y2, const Color*, const Brush* ); virtual void rect( Coord l, Coord b, Coord r, Coord t, const Color*, const Brush* ); virtual void fill(const Color*) = 0; virtual void fill_rect(Coord l, Coord b, Coord r, Coord t, const Color*); virtual void character( const Font*, long ch, Coord width, const Color*, Coord x, Coord y ) = 0; virtual void stencil(const Bitmap*, const Color*, Coord x, Coord y) = 0; virtual void image(const Raster*, Coord x, Coord y) = 0; // stencil() stencils the bitmap foreground bits (those set to 1) // on the rendering surface in the given color at the given location. // The bitmap acts as a mask for the operation, as well as the source // of data. // // image() transfers a Raster (color bitmap) to the canvas surface // at the given location. // virtual void push_transform() = 0; virtual void transform(const Transformer&) = 0; virtual void pop_transform() = 0; virtual void transformer(const Transformer&) = 0; virtual const Transformer& transformer() const = 0; virtual void push_clipping(boolean all = false) = 0; virtual void clip() = 0; virtual void clip_rect(Coord l, Coord b, Coord r, Coord t); virtual void pop_clipping() = 0; virtual void damage(const Extension&) = 0; virtual void damage(Coord left, Coord bottom, Coord right, Coord top) = 0; virtual boolean damaged(const Extension&) const = 0; virtual boolean damaged( Coord left, Coord bottom, Coord right, Coord top ) const = 0; virtual void damage_area(Extension&) = 0; virtual void damage_all() = 0; virtual boolean any_damage() const = 0; virtual void restrict_damage(const Extension&) = 0; virtual void restrict_damage( Coord left, Coord bottom, Coord right, Coord top ) = 0; virtual void front_buffer(); virtual void back_buffer(); // These functions are for canvases that are bound to a window. If // the canvas is not bound to a window, these functions will have // no effect. The front_buffer() function switches the window into // immediate-mode rendering and will render directly to the window // without double-buffering (and allows rendering outside of the // Glyph::draw() function. This is typically used for things like // rubber-banding. The back_buffer() function switchs out of // immediate-mode and back to being double-buffered if double // buffering is being done. virtual void redraw(Coord left, Coord bottom, Coord right, Coord top) = 0; virtual void repair() = 0; }; #endif #include <InterViews/_leave.h> #endif