Initial commit

engines/hadesch/gfx_context.h

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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/>.
+ *
+ * Copyright 2020 Google
+ *
+ */
+#ifndef HADESCH_GFX_CONTEXT_H
+#define HADESCH_GFX_CONTEXT_H
+
+#include "common/ptr.h"
+#include "common/rect.h"
+#include "graphics/managed_surface.h"
+
+namespace Hadesch {
+class GfxContext {
+public:
+	virtual void blitVideo(byte *sourcePixels, int sourcePitch, int sourceW, int sourceH,
+			       byte *palette, Common::Point offset) = 0;
+	// Use only in pod_image.cpp because of palette format
+	virtual void blitPodImage(byte *sourcePixels, int sourcePitch, int sourceW, int sourceH,
+				  byte *palette, size_t ncolours, Common::Point offset) = 0;
+	virtual void clear() = 0;
+	virtual void renderSubtitle(const Common::U32String &, Common::Point viewPoint) = 0;
+	virtual void fade(int val) = 0;
+	virtual void renderToScreen(Common::Point viewPoint) = 0;
+	virtual ~GfxContext() {}
+};
+
+class GfxContext8Bit : public GfxContext, Common::NonCopyable {
+public:
+  	void blitVideo(byte *sourcePixels, int sourcePitch, int sourceW, int sourceH,
+		       byte *palette, Common::Point offset) override;
+	void blitPodImage(byte *sourcePixels, int sourcePitch, int sourceW, int sourceH,
+			  byte *palette, size_t ncolours, Common::Point offset) override;
+	void clear() override;
+	void fade(int val) override;
+	void renderToScreen(Common::Point viewPoint) override;
+	void renderSubtitle(const Common::U32String &, Common::Point viewPoint) override;
+	byte findColor(byte r, byte g, byte b);
+
+	GfxContext8Bit(int canvasW, int canvasH);
+	~GfxContext8Bit() {}
+
+private:
+	Graphics::ManagedSurface surf;
+	byte _palette[256 * 4];
+	bool _paletteUsed[256];
+};
+
+void blendVideo8To8(byte *targetPixels, int targetPitch, int targetW, int targetH,
+		    byte *sourcePixels, int sourceW, int sourceH, Common::Point offset);
+
+}
+
+#endif