isf15acp4_graphics_context.hpp

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#pragma once
 
#include <cstddef>
#include <cstdint>
 
#include "isf15acp4_canvas.hpp"
#include "isf15acp4_graphics_surface.hpp"
 
namespace isf15acp4 {
 
struct DisplayPresenter {
    bool (*draw_pixel)(void* ctx, uint8_t x, uint8_t y, Color565 color) noexcept{nullptr};
    bool (*draw_line)(void* ctx, Point a, Point b, Color565 color) noexcept{nullptr};
    bool (*draw_rect)(void* ctx, Rect r, Color565 color, bool filled) noexcept{nullptr};
    bool (*fill_screen)(void* ctx, Color565 color) noexcept{nullptr};
    bool (*flush_canvas)(void* ctx, const Color565* data, std::size_t bytes) noexcept{nullptr};
    void* context{nullptr};
};
 
class GraphicsContext : public GraphicsSurface<GraphicsContext> {
public:
    GraphicsContext(ProductVariant variant, GraphicsBackend backend) noexcept;
 
    [[nodiscard]] GraphicsBackend Backend() const noexcept { return backend_; }
    [[nodiscard]] ProductVariant Variant() const noexcept { return variant_; }
 
    [[nodiscard]] Canvas& CanvasBuffer() noexcept { return canvas_; }
    [[nodiscard]] const Canvas& CanvasBuffer() const noexcept { return canvas_; }
 
    void BindPresenter(const DisplayPresenter& presenter) noexcept { presenter_ = presenter; }
 
    void Clear(Color565 color) noexcept;
    void SetPixel(uint8_t x, uint8_t y, Color565 color) noexcept;
    [[nodiscard]] Color565 GetPixel(uint8_t x, uint8_t y) const noexcept;
    void DrawHLine(uint8_t x0, uint8_t x1, uint8_t y, Color565 color) noexcept;
    void DrawVLine(uint8_t x, uint8_t y0, uint8_t y1, Color565 color) noexcept;
    void DrawRect(const Rect& rect, Color565 color) noexcept;
    void FillRect(const Rect& rect, Color565 color) noexcept;
    void DrawChar(uint8_t x, uint8_t y, char ch, Color565 color, Color565 bg = colors::Black) noexcept;
    void DrawString(uint8_t x, uint8_t y, const char* text, Color565 color,
                    Color565 bg = colors::Black) noexcept;
    void BlitRgb565(uint8_t x, uint8_t y, uint8_t src_width, uint8_t src_height,
                      const Color565* src) noexcept;
 
    [[nodiscard]] uint8_t Width() const noexcept { return canvas_.Width(); }
    [[nodiscard]] uint8_t Height() const noexcept { return canvas_.Height(); }
    [[nodiscard]] std::size_t ByteSize() const noexcept { return canvas_.ByteSize(); }
    [[nodiscard]] const Color565* Data() const noexcept { return canvas_.Data(); }
    [[nodiscard]] Color565* Data() noexcept { return canvas_.Data(); }
 
private:
    ProductVariant variant_;
    GraphicsBackend backend_;
    Canvas canvas_;
    DisplayPresenter presenter_{};
};
 
}  // namespace isf15acp4
 
#define ISF15ACP4_GRAPHICS_CONTEXT_HEADER_INCLUDED
#include "../src/isf15acp4_graphics_context.ipp"
#undef ISF15ACP4_GRAPHICS_CONTEXT_HEADER_INCLUDED