mirror of https://github.com/axmolengine/axmol.git
59 lines
1.3 KiB
C++
59 lines
1.3 KiB
C++
#include "HitTest.h"
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#include "GComponent.h"
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#include "utils/ByteBuffer.h"
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USING_NS_AX;
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NS_FGUI_BEGIN
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PixelHitTestData::PixelHitTestData() :
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pixels(nullptr),
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pixelsLength(0),
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pixelWidth(0),
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scale(1)
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{
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}
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PixelHitTestData::~PixelHitTestData()
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{
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AX_SAFE_DELETE(pixels);
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}
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void PixelHitTestData::load(ByteBuffer* buffer)
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{
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buffer->skip(4);
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pixelWidth = buffer->readInt();
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scale = 1.0f / buffer->readByte();
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pixelsLength = buffer->readInt();
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pixels = new unsigned char[pixelsLength];
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for (size_t i = 0; i < pixelsLength; i++)
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pixels[i] = buffer->readByte();
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}
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PixelHitTest::PixelHitTest(PixelHitTestData * data, int offsetX, int offsetY) :
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offsetX(offsetX),
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offsetY(offsetY),
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scaleX(1),
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scaleY(1),
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_data(data)
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{
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}
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bool PixelHitTest::hitTest(GComponent * obj, const ax::Vec2 & localPoint)
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{
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int x = floor((localPoint.x / scaleX - offsetX) * _data->scale);
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int y = floor(((obj->getHeight() - localPoint.y) / scaleY - offsetY) * _data->scale);
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if (x < 0 || y < 0 || x >= _data->pixelWidth)
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return false;
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ssize_t pos = y * _data->pixelWidth + x;
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ssize_t pos2 = pos / 8;
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ssize_t pos3 = pos % 8;
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if (pos2 >= 0 && pos2 < (ssize_t)_data->pixelsLength)
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return ((_data->pixels[pos2] >> pos3) & 0x1) > 0;
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else
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return false;
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}
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NS_FGUI_END
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