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Picture.cpp
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Picture.cpp
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#include "Picture.h"
#include <string>
namespace RayTracer {
Picture::Picture(const unsigned resolutionX, const unsigned resolutionY) : data(std::vector<png_byte>(resolutionX * resolutionY * 3)), resolutionX(resolutionX), resolutionY(resolutionY) {}
unsigned Picture::calculateIndex(const unsigned x, const unsigned y) const
{
// libPNG uses bottom-left origin, we use top-left origin
return (x + (resolutionY - 1u - y) * resolutionX) * 3u;
}
void Picture::setPixel(const unsigned x, const unsigned y, const std::array<png_byte, 3>& color)
{
const unsigned index = calculateIndex(x, y);
for (unsigned i = 0; i < 3; ++i)
data[index + i] = color[i];
}
void Picture::setPixel(const unsigned x, const unsigned y, const glm::vec3& color)
{
const unsigned index = calculateIndex(x, y);
for (int i = 0; i < 3; ++i)
data[index + i] = static_cast<png_byte>(color[i] * 255);
}
void Picture::setPixel(const unsigned index, const glm::vec3& color)
{
for (int i = 0; i < 3; ++i)
data[index + i] = static_cast<png_byte>(color[i] * 255);
}
std::array<png_byte, 3> Picture::getPixel(const unsigned x, const unsigned y) const
{
const unsigned index = calculateIndex(x, y);
return {data[index], data[index + 1], data[index + 2]};
}
const std::vector<png_byte>& Picture::getData() const
{
return data;
}
unsigned Picture::getResolutionX() const
{
return resolutionX;
}
unsigned Picture::getResolutionY() const
{
return resolutionY;
}
std::string Picture::getDebugView() const
{
auto output = std::string();
for (unsigned y = 0; y < resolutionY; ++y)
{
for (unsigned x = 0; x < resolutionX; ++x)
{
const auto pixel = getPixel(x, y);
output.append(std::to_string(pixel[0] + pixel[1] + pixel[2]) + "\t");
}
output.append("\n");
}
return output;
}
} // RayTracer