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backends/platform/libretro/include/libretro-graphics-surface.h

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+/* Copyright (C) 2024 Giovanni Cascione <ing.cascione@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#ifndef BACKENDS_LIBRETRO_GRAPHICS_SURFACE_H
+#define BACKENDS_LIBRETRO_GRAPHICS_SURFACE_H
+
+#include "common/system.h"
+#include "graphics/palette.h"
+#include "graphics/managed_surface.h"
+#include "backends/graphics/windowed.h"
+
+class LibretroGraphics : public WindowedGraphicsManager {
+
+public:
+	Graphics::ManagedSurface _screen;
+	Graphics::Surface _gameScreen;
+	Graphics::Surface _overlay;
+	Graphics::Surface _cursor;
+	Graphics::Palette _cursorPalette;
+	Graphics::Palette _gamePalette;
+
+private:
+	bool _cursorDontScale;
+	bool _cursorPaletteEnabled;
+	bool _screenUpdatePending;
+	int _cursorHotspotX;
+	int _cursorHotspotY;
+	int _cursorKeyColor;
+	int _screenChangeID;
+	int _cursorHotspotXScaled;
+	int _cursorHotspotYScaled;
+	float _cursorWidthScaled;
+	float _cursorHeightScaled;
+
+public:
+	LibretroGraphics();
+	~LibretroGraphics();
+	Common::List<Graphics::PixelFormat> getSupportedFormats() const override;
+	const OSystem::GraphicsMode *getSupportedGraphicsModes(void) const override;
+	void initSize(uint width, uint height, const Graphics::PixelFormat *format) override;
+	int16 getHeight(void) const override;
+	int16 getWidth(void) const override;
+	Graphics::PixelFormat getScreenFormat(void) const override;
+	void copyRectToScreen(const void *buf, int pitch, int x, int y, int w, int h) override;
+	void updateScreen(void) override;
+	void clearOverlay(void) override;
+	void grabOverlay(Graphics::Surface &surface) const override;
+	void copyRectToOverlay(const void *buf, int pitch, int x, int y, int w, int h) override;
+	int16 getOverlayHeight(void) const override;
+	int16 getOverlayWidth(void) const override;
+	Graphics::PixelFormat getOverlayFormat() const override;
+	const Graphics::ManagedSurface *getScreen(void);
+	void warpMouse(int x, int y) override;
+	void setMouseCursor(const void *buf, uint w, uint h, int hotspotX, int hotspotY, uint32 keycolor = 255, bool dontScale = false, const Graphics::PixelFormat *format = NULL, const byte *mask = nullptr) override;
+	void setCursorPalette(const byte *colors, uint start, uint num) override;
+	bool isOverlayInGUI(void);
+
+	bool hasFeature(OSystem::Feature f) const override;
+	void setFeatureState(OSystem::Feature f, bool enable) override;
+	bool getFeatureState(OSystem::Feature f) const override;
+
+	int getDefaultGraphicsMode() const override {
+		return 0;
+	}
+	bool setGraphicsMode(int mode, uint flags = OSystem::kGfxModeNoFlags) override {
+		return true;
+	}
+	int getGraphicsMode() const override {
+		return 0;
+	}
+	Graphics::Surface *lockScreen() override {
+		return &_gameScreen;
+	}
+	void unlockScreen() override {}
+
+	int getScreenChangeID() const override;
+	void beginGFXTransaction() override {}
+	OSystem::TransactionError endGFXTransaction() override;
+	void fillScreen(uint32 col) override {}
+	void fillScreen(const Common::Rect &r, uint32 col) override {}
+	void setFocusRectangle(const Common::Rect &rect) override {}
+	void clearFocusRectangle() override {}
+
+	void realUpdateScreen(void);
+
+	bool gameNeedsAspectRatioCorrection() const override {
+		return false;
+	}
+	void handleResizeImpl(const int width, const int height) override;
+	void setSystemMousePosition(const int x, const int y) override {}
+	void setMousePosition(int x, int y);
+
+	void displayMessageOnOSD(const Common::U32String &msg) override;
+
+protected:
+	void setPalette(const byte *colors, uint start, uint num) override;
+	void grabPalette(byte *colors, uint start, uint num) const override;
+private:
+	void overrideCursorScaling();
+};
+#endif //BACKENDS_LIBRETRO_GRAPHICS_SURFACE_H