Rice Video Plugin for GLES1.1

[mupen64plus-pandora.git] / source / rice_gles / src / Texture.h

diff --git a/source/rice_gles/src/Texture.h b/source/rice_gles/src/Texture.h
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+/*
+Copyright (C) 2003 Rice1964
+
+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 2
+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, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+
+
+#ifndef __SURFACEHANDLER_H__
+#define __SURFACEHANDLER_H__
+
+#include "typedefs.h"
+
+/////////////// Define a struct to use as
+///////////////  storage for all the surfaces
+///////////////  created so far.
+class CTexture;
+
+typedef struct {
+    unsigned short int  dwWidth;            // Describes the width of the real texture area. Use lPitch to move between successive lines
+    unsigned short int  dwHeight;           // Describes the height of the real texture area
+    unsigned short int  dwCreatedWidth;     // Describes the width of the created texture area. Use lPitch to move between successive lines
+    unsigned short int  dwCreatedHeight;    // Describes the height of the created texture area
+    int        lPitch;             // Specifies the number of bytes on each row (not necessarily bitdepth*width/8)
+    void        *lpSurface;         // Pointer to the top left pixel of the image
+} DrawInfo;
+
+
+enum TextureFmt {
+    TEXTURE_FMT_A8R8G8B8,
+    TEXTURE_FMT_A4R4G4B4,
+    TEXTURE_FMT_UNKNOWN,
+};
+
+enum TextureUsage {
+    AS_NORMAL,
+    AS_RENDER_TARGET,
+    AS_BACK_BUFFER_SAVE,
+};
+
+class CTexture
+{
+public:
+    virtual ~CTexture();
+
+    uint32      m_dwWidth;          // The requested Texture w/h
+    uint32      m_dwHeight;
+
+    unsigned int        m_dwCreatedTextureWidth;    // What was actually created
+    unsigned int        m_dwCreatedTextureHeight;
+
+    float       m_fXScale;      // = m_dwCorrectedWidth/m_dwWidth
+    float       m_fYScale;      // = m_dwCorrectedHeight/m_dwWidth
+
+    bool        m_bScaledS;
+    bool        m_bScaledT;
+
+    bool        m_bClampedS;
+    bool        m_bClampedT;
+
+    bool        m_bIsEnhancedTexture;
+    
+    TextureUsage    m_Usage;
+
+    virtual void ScaleImageToSurface(bool scaleS=true, bool scaleT=true);
+    virtual void ClampImageToSurfaceS();
+    virtual void ClampImageToSurfaceT();
+
+    virtual LPRICETEXTURE GetTexture() { return m_pTexture; }
+
+    uint32          GetPixelSize();
+    TextureFmt      GetSurfaceFormat(void); // Surface pixel format...
+    inline void     SetOthersVariables(void)
+    {
+        m_bClampedS = m_bScaledS = (m_dwWidth == m_dwCreatedTextureWidth);
+        m_bClampedT = m_bScaledT = (m_dwHeight == m_dwCreatedTextureHeight);
+    }
+
+    // Provides access to "surface"
+    virtual bool StartUpdate(DrawInfo *di)=0;
+    virtual void EndUpdate(DrawInfo *di)=0;
+
+    virtual void RestoreAlphaChannel(void); // Restore Alpha channel from RGB channel
+
+protected:
+    CTexture(uint32 dwWidth, uint32 dwHeight, TextureUsage usage = AS_NORMAL);
+    LPRICETEXTURE   m_pTexture;
+    TextureFmt      m_dwTextureFmt;
+};
+
+#endif
+