118 lines
2.1 KiB
C++
118 lines
2.1 KiB
C++
#include "CanvasPortion.h"
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#include <cassert>
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#include "CanvasPixel.h"
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#include "CanvasPreview.h"
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#define CHECK_COORDINATES() assert(x >= 0); \
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assert(x < width); \
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assert(y >= 0); \
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assert(y < height); \
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assert(pixels != NULL)
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CanvasPortion::CanvasPortion(CanvasPreview* preview):
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preview(preview)
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{
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width = 1;
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height = 1;
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xoffset = 0;
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yoffset = 0;
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pixels = NULL;
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}
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CanvasPortion::~CanvasPortion()
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{
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if (pixels)
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{
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delete[] pixels;
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}
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}
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int CanvasPortion::getFragmentCount(int x, int y) const
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{
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CHECK_COORDINATES();
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return pixels[y * width + x].getFragmentCount();
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}
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const CanvasFragment *CanvasPortion::getFrontFragment(int x, int y) const
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{
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CHECK_COORDINATES();
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return pixels[y * width + x].getFrontFragment();
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}
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void CanvasPortion::clear()
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{
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int n = width * height;
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for (int i = 0; i < n; i++)
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{
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pixels[i].reset();
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}
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}
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void CanvasPortion::setSize(int width, int height, int xoffset, int yoffset)
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{
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this->width = width;
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this->height = height;
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this->xoffset = xoffset;
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this->yoffset = yoffset;
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}
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void CanvasPortion::preparePixels()
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{
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if (pixels)
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{
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delete[] pixels;
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}
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pixels = new CanvasPixel[width * height];
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clear();
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}
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void CanvasPortion::discardPixels()
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{
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if (pixels)
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{
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delete[] pixels;
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pixels = NULL;
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}
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}
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void CanvasPortion::pushFragment(int x, int y, const CanvasFragment &fragment)
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{
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CHECK_COORDINATES();
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CanvasPixel &pixel = pixels[y * width + x];
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Color old_color = pixel.getComposite();
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pixel.pushFragment(fragment);
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if (preview)
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{
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preview->pushPixel(xoffset + x, yoffset + y, old_color, pixel.getComposite());
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}
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}
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const CanvasPixel &CanvasPortion::at(int x, int y)
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{
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CHECK_COORDINATES();
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return pixels[y * width + x];
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}
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void CanvasPortion::setColor(int x, int y, const Color &color)
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{
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CHECK_COORDINATES();
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CanvasPixel &pixel = pixels[y * width + x];
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Color old_color = pixel.getComposite();
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pixel.setComposite(color);
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if (preview)
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{
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preview->pushPixel(xoffset + x, yoffset + y, old_color, pixel.getComposite());
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}
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}
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