ImGuiBitmapViewer.hh

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#ifndef IMGUI_BITMAP_VIEWER_HH
#define IMGUI_BITMAP_VIEWER_HH
 
#include "ImGuiPart.hh"
 
#include "GLUtil.hh"
#include "gl_vec.hh"
 
#include <cstdint>
#include <optional>
#include <span>
 
namespace openmsx {
 
class ImGuiBitmapViewer final : public ImGuiPart
{
public:
        using ImGuiPart::ImGuiPart;
 
        [[nodiscard]] zstring_view iniName() const override { return "bitmap viewer"; }
        void save(ImGuiTextBuffer& buf) override;
        void loadLine(std::string_view name, zstring_view value) override;
        void paint(MSXMotherBoard* motherBoard) override;
 
private:
        void renderBitmap(std::span<const uint8_t> vram, std::span<const uint32_t, 16> palette16,
                          int mode, int lines, int page, uint32_t* output) const;
 
public:
        bool showBitmapViewer = false;
 
private:
        int bitmapManual = 0; // 0 -> use VDP settings, 1 -> use manual settings
        enum BitmapScrnMode : int { SCR5, SCR6, SCR7, SCR8, SCR11, SCR12, OTHER };
        int bitmapScrnMode = 0;
        int bitmapPage = 0; // 0-3 or 0-1 depending on screen mode   TODO extended VRAM
        int bitmapLines = 1; // 0->192, 1->212, 2->256
        int bitmapColor0 = 16; // 0..15, 16->no replacement
        int bitmapZoom = 0; // 0->1x, 1->2x, ..., 7->8x
        bool bitmapGrid = true;
        gl::vec4 bitmapGridColor{0.0f, 0.0f, 0.0f, 0.5f}; // RGBA
 
        std::optional<gl::Texture> bitmapTex; // TODO also deallocate when needed
        std::optional<gl::Texture> bitmapGridTex;
 
        static constexpr auto persistentElements = std::tuple{
                PersistentElement   {"show",     &ImGuiBitmapViewer::showBitmapViewer},
                PersistentElementMax{"override", &ImGuiBitmapViewer::bitmapManual, 2},
                PersistentElementMax{"scrnMode", &ImGuiBitmapViewer::bitmapScrnMode, OTHER}, // SCR5..SCR12
                PersistentElementMax{"page",     &ImGuiBitmapViewer::bitmapPage, 4},
                PersistentElementMax{"lines",    &ImGuiBitmapViewer::bitmapLines, 3},
                PersistentElementMax{"color0",   &ImGuiBitmapViewer::bitmapColor0, 16 + 1},
                PersistentElementMax{"zoom",     &ImGuiBitmapViewer::bitmapZoom, 8},
                PersistentElement   {"showGrid", &ImGuiBitmapViewer::bitmapGrid},
                PersistentElement   {"gridColor",&ImGuiBitmapViewer::bitmapGridColor}
        };
};
 
} // namespace openmsx
 
#endif