add render RageTexture class

stepmania/src/RageTextureRenderTarget.cpp

@@ -0,0 +1,93 @@
+#include "global.h"
+#include "RageTextureRenderTarget.h"
+#include "RageDisplay.h"
+
+RageTextureRenderTarget::RageTextureRenderTarget( RageTextureID name, const RenderTargetParam &param ):
+	RageTexture( name ),
+	m_Param( param )
+{
+	Create();
+}
+
+RageTextureRenderTarget::~RageTextureRenderTarget()
+{
+	Destroy();
+}
+
+void RageTextureRenderTarget::Reload()
+{
+	Destroy();
+	Create();
+}
+
+/* RageTextureID identifies a file and a mechanism for loading it.  We don't use any
+ * of that, except as a unique identifier for this texture, so it can be loaded
+ * elsewhere.  Render targets can't be loaded blindly like a regular texture, anyway,
+ * since something has to render into it. */
+void RageTextureRenderTarget::Create()
+{
+	/* All render targets support non-power-of-two targets, but some require that the
+	 * resulting texture dimensions be powers of two.  CreateRenderTarget returns
+	 * the actual resolution. */
+	m_iTexHandle = DISPLAY->CreateRenderTarget( m_Param, m_iTextureWidth, m_iTextureHeight );
+
+	m_iSourceWidth = m_Param.iWidth;
+	m_iSourceHeight = m_Param.iHeight;
+	m_iImageWidth = m_Param.iWidth;
+	m_iImageHeight = m_Param.iHeight;
+	m_iFramesWide = m_iFramesHigh = 1;
+
+	CreateFrameRects();
+}
+
+void RageTextureRenderTarget::Destroy()
+{
+	DISPLAY->DeleteTexture( m_iTexHandle );
+}
+
+void RageTextureRenderTarget::BeginRenderingTo( bool bPreserveTexture )
+{
+	DISPLAY->SetRenderTarget( m_iTexHandle, bPreserveTexture );
+
+	/* We're rendering to a texture, not the framebuffer.  Stash away the
+	 * centering matrix, and set it to identity. */
+	DISPLAY->CenteringPushMatrix();
+	DISPLAY->ChangeCentering( 0, 0, 0, 0 );
+
+	// Reset the perspective to fit the new target.
+	int iWidth = m_Param.iWidth, iHeight = m_Param.iHeight;
+	DISPLAY->LoadMenuPerspective( 0, m_iImageWidth, m_iImageHeight, m_iImageWidth/2, m_iImageHeight/2 ); // 0 FOV = ortho
+}
+
+void RageTextureRenderTarget::FinishRenderingTo()
+{
+	// Restore the centering matrix.
+	DISPLAY->CenteringPopMatrix();
+
+	DISPLAY->SetRenderTarget( 0 );
+}
+
+/*
+ * Copyright (c) 2001-2006 Glenn Maynard, Chris Danford
+ * All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, and/or sell copies of the Software, and to permit persons to
+ * whom the Software is furnished to do so, provided that the above
+ * copyright notice(s) and this permission notice appear in all copies of
+ * the Software and that both the above copyright notice(s) and this
+ * permission notice appear in supporting documentation.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
+ * THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
+ * INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
+ * OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+ * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */

stepmania/src/RageTextureRenderTarget.h

@@ -0,0 +1,53 @@
+#ifndef RAGE_TEXTURE_RENDER_TARGET_H
+#define RAGE_TEXTURE_RENDER_TARGET_H
+
+#include "RageTexture.h"
+#include "RageTextureID.h"
+#include "RageDisplay.h" // for RenderTargetParam
+
+class RageTextureRenderTarget: public RageTexture
+{
+public:
+	RageTextureRenderTarget( RageTextureID name, const RenderTargetParam &param );
+	virtual ~RageTextureRenderTarget();
+	virtual void Invalidate() { m_iTexHandle = 0; /* don't Destroy() */ }
+	virtual void Reload();
+	virtual unsigned GetTexHandle() const { return m_iTexHandle; }
+
+	void BeginRenderingTo( bool bPreserveTexture = true );
+	void FinishRenderingTo();
+
+private:
+	const RenderTargetParam m_Param;
+
+	void Create();
+	void Destroy();
+	unsigned m_iTexHandle;
+};
+
+#endif
+
+/*
+ * Copyright (c) 2001-2006 Glenn Maynard, Chris Danford
+ * All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, and/or sell copies of the Software, and to permit persons to
+ * whom the Software is furnished to do so, provided that the above
+ * copyright notice(s) and this permission notice appear in all copies of
+ * the Software and that both the above copyright notice(s) and this
+ * permission notice appear in supporting documentation.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
+ * THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
+ * INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
+ * OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+ * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */