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The Power in your Hands |
Bitmap Class Reference
#include <Pt/Gfx/Bitmap.h>
Off-screen drawing surface backed by an image. More...
Inherits PaintSurface.
Public Member Functions | |
| Bitmap () | |
| Constructs an empty bitmap. | |
| Bitmap (const Gfx::SizeF &size, std::size_t stride=0) | |
| Constructs a bitmap with the given size and optional stride. | |
| virtual | ~Bitmap () |
| Destroys the bitmap. | |
| void | reset () |
| Resets to empty state. | |
| void | reset (const Gfx::Image &image) |
| Replaces the bitmap with an existing image. | |
| void | reset (const Gfx::SizeF &, std::size_t stride=0) |
| Resets the bitmap to a new size in physical pixels. | |
| bool | empty () const |
| Returns true if no image data is available. | |
| const Gfx::Image & | image () const |
| Returns the underlying image. | |
| void | setScaleFactor (double scaleFactor) |
| Sets the target scale factor. | |
| void | drawBitmap (const Pt::Gfx::PointF &to, const Bitmap &image, const Gfx::Paint &paint, const Gfx::RectF *rect=0) |
| Draws another bitmap into this bitmap. | |
| const Gfx::ImageFormat & | format () const |
| Returns the image format. | |
| const Gfx::SizeF & | size () const |
| Returns the size in physical pixels. | |
| const Scaling & | scaling () const |
| Returns the scaling from logical to physical pixels. | |
| Canvas * | getCanvas (Canvas *canvas) |
| Returns a canvas for backend drawing. | |
| void | sync () |
| Synchronizes pending operations to the surface. | |
| void | finish () |
| Finishes painting to the surface. | |
Static Public Member Functions | |
| static const std::string & | defaultFont () |
| Returns the default font family used by the backend. | |
| static void | setDefaultFont (const std::string &family) |
| Sets the default font family used by the backend. | |
| static std::vector< std::string > | fontFamilies () |
| Returns the available font families. | |
| static std::vector< FontFace > | fontFaces (const std::string &family) |
| Returns the font faces of a family. | |
Protected Member Functions | |
| virtual const Gfx::ImageFormat & | onGetFormat () const |
| Returns the image format. | |
| virtual const Gfx::SizeF & | onGetSize () const |
| Returns the size in physical pixel. | |
| virtual const Scaling & | onGetScaling () const |
| Returns the scaling fro logical to physical pixels. | |
| virtual Gfx::Canvas * | onCreateCanvas (Gfx::Canvas *reuse) override |
| Creates a Canvas. | |
| virtual void | onReleaseCanvas () override |
| Releases the current Canvas. | |
| virtual void | onSync () override |
| Synchronizes pending operations to the surface. | |
| virtual void | onFinish () override |
| Finishes painting to the surface. | |
| void | invalidate () |
| Invalidates the currently active paint canvas. | |
| virtual Gfx::Canvas * | onGetCanvas (Gfx::Canvas *reuse) |
| Returns a reusable canvas instance. | |
Detailed Description
Bitmap is the standard in-memory PaintSurface implementation. It can be used as a rendering target for Painter and also exposes the rendered image so that drawing results can be copied, inspected or reused by image APIs.