97 lines
2.3 KiB
C++
97 lines
2.3 KiB
C++
#pragma once
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#include "core_global.h"
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#include <string>
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namespace paysages {
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namespace software {
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/**
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* Rectangular portion of a Canvas.
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*
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* Contains the pixels of a canvas region (CanvasPixel).
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*
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* Pixels are not allocated until preparePixels is called.
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*/
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class CORESHARED_EXPORT CanvasPortion {
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public:
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CanvasPortion(int index = 0, CanvasPreview *preview = nullptr);
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virtual ~CanvasPortion();
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inline int getWidth() const {
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return width;
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}
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inline int getHeight() const {
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return height;
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}
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inline int getXOffset() const {
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return xoffset;
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}
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inline int getYOffset() const {
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return yoffset;
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}
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int getFragmentCount(int x, int y) const;
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const CanvasFragment *getFrontFragment(int x, int y) const;
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void clear();
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void setSize(int width, int height, int xoffset = 0, int yoffset = 0);
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/**
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* Prepare (allocate in memory) the pixels area.
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*/
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void preparePixels();
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/**
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* Discard the memory used by pixels.
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*
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* If save is true, the portion will be saved to disk before.
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*/
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void discardPixels(bool save = true);
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/**
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* Save the portion to a picture file on disk.
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*/
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void saveToDisk();
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/**
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* Bind a stream to pixel data, and position it on a given pixel.
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*
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* Returns true if the stream was successfully located, false if it was not possible.
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*/
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bool getReadStream(PackStream &stream, int x = 0, int y = 0);
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/**
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* Add a fragment to the pixel located at (x, y).
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*
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* Checking x and y coordinates to be in the canvas portion should be done before this call.
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*/
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void pushFragment(int x, int y, const CanvasFragment &fragment);
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/**
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* Get the CanvasPixel at a given coordinates.
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*
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* Checking x and y coordinates to be in the canvas portion should be done before this call.
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*/
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const CanvasPixel &at(int x, int y);
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/**
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* Change the final color of the pixel.
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*
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* Checking x and y coordinates to be in the canvas portion should be done before this call.
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*/
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void setColor(int x, int y, const Color &color);
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private:
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int index;
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int width;
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int height;
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int xoffset;
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int yoffset;
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CanvasPixel *pixels;
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CanvasPreview *preview;
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string filepath;
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};
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}
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}
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