46 lines
954 B
C++
46 lines
954 B
C++
#include <cstring>
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#include "PixelAttributes.h"
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PixelAttributes::PixelAttributes():
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m_width(0)
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{
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for (size_t i = 0; i < LineCount; ++i) {
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m_pixelAttributes[i] = nullptr;
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}
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}
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PixelAttributes::~PixelAttributes()
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{
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freeAttributes();
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}
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void PixelAttributes::setWidth(int width)
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{
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freeAttributes();
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m_width = width + 1; // 1px gradient calculation
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for (size_t i = 0; i < LineCount; ++i) {
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m_pixelAttributes[i] = new PixelAttribute[m_width];
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}
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}
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void PixelAttributes::scroll()
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{
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size_t lineLength = m_width * sizeof(PixelAttribute);
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memcpy(m_pixelAttributes[FirstLine], m_pixelAttributes[LastLine], lineLength);
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for (size_t i = 1; i < LineCount - 1; ++i) {
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memcpy(m_pixelAttributes[i], m_pixelAttributes[EmptyLine], lineLength);
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}
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}
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void PixelAttributes::freeAttributes()
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{
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for (size_t i = 0; i < LineCount; ++i) {
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if (m_pixelAttributes[i] != nullptr) {
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delete[] m_pixelAttributes[i];
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m_pixelAttributes[i] = nullptr;
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}
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}
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}
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