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#pragma once
#include "nes/common/rgb.hh"
namespace nes
{
class rgb;
/// Abstraction of the display logic.
class display
{
public:
static constexpr auto width = unsigned{ 256 };
static constexpr auto height = unsigned{ 240 };
virtual ~display() = default;
display(display const&) = delete;
display(display&&) = delete;
auto operator=(display const&) -> display& = delete;
auto operator=(display&&) -> display& = delete;
/// Switch between front and back buffers.
virtual auto switch_buffers() -> void = 0;
/// Update the pixel at the given position in the back buffer.
virtual auto set(unsigned x, unsigned y, rgb value) -> void = 0;
/// Load the pixel value at the given position in the back buffer.
virtual auto get(unsigned x, unsigned y) const -> rgb = 0;
/// Clear the entire back buffer with a color.
virtual auto clear(rgb const color) -> void
{
for (auto y = unsigned{ 0 }; y < height; ++y)
{
for (auto x = unsigned{ 0 }; x < width; ++x)
{
set(x, y, color);
}
}
}
protected:
explicit display() = default;
};
} // namespace nes
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