| 1 | /* |
| 2 | Copyright (C) 2003 Rice1964 |
| 3 | |
| 4 | This program is free software; you can redistribute it and/or |
| 5 | modify it under the terms of the GNU General Public License |
| 6 | as published by the Free Software Foundation; either version 2 |
| 7 | of the License, or (at your option) any later version. |
| 8 | |
| 9 | This program is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | GNU General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU General Public License |
| 15 | along with this program; if not, write to the Free Software |
| 16 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 17 | |
| 18 | */ |
| 19 | |
| 20 | |
| 21 | #ifndef __SURFACEHANDLER_H__ |
| 22 | #define __SURFACEHANDLER_H__ |
| 23 | |
| 24 | #include "typedefs.h" |
| 25 | |
| 26 | /////////////// Define a struct to use as |
| 27 | /////////////// storage for all the surfaces |
| 28 | /////////////// created so far. |
| 29 | class CTexture; |
| 30 | |
| 31 | typedef struct { |
| 32 | unsigned short int dwWidth; // Describes the width of the real texture area. Use lPitch to move between successive lines |
| 33 | unsigned short int dwHeight; // Describes the height of the real texture area |
| 34 | unsigned short int dwCreatedWidth; // Describes the width of the created texture area. Use lPitch to move between successive lines |
| 35 | unsigned short int dwCreatedHeight; // Describes the height of the created texture area |
| 36 | int lPitch; // Specifies the number of bytes on each row (not necessarily bitdepth*width/8) |
| 37 | void *lpSurface; // Pointer to the top left pixel of the image |
| 38 | } DrawInfo; |
| 39 | |
| 40 | |
| 41 | enum TextureFmt { |
| 42 | TEXTURE_FMT_A8R8G8B8, |
| 43 | TEXTURE_FMT_A4R4G4B4, |
| 44 | TEXTURE_FMT_UNKNOWN, |
| 45 | }; |
| 46 | |
| 47 | enum TextureUsage { |
| 48 | AS_NORMAL, |
| 49 | AS_RENDER_TARGET, |
| 50 | AS_BACK_BUFFER_SAVE, |
| 51 | }; |
| 52 | |
| 53 | class CTexture |
| 54 | { |
| 55 | public: |
| 56 | virtual ~CTexture(); |
| 57 | |
| 58 | uint32 m_dwWidth; // The requested Texture w/h |
| 59 | uint32 m_dwHeight; |
| 60 | |
| 61 | unsigned int m_dwCreatedTextureWidth; // What was actually created |
| 62 | unsigned int m_dwCreatedTextureHeight; |
| 63 | |
| 64 | float m_fXScale; // = m_dwCorrectedWidth/m_dwWidth |
| 65 | float m_fYScale; // = m_dwCorrectedHeight/m_dwWidth |
| 66 | |
| 67 | bool m_bScaledS; |
| 68 | bool m_bScaledT; |
| 69 | |
| 70 | bool m_bClampedS; |
| 71 | bool m_bClampedT; |
| 72 | |
| 73 | bool m_bIsEnhancedTexture; |
| 74 | |
| 75 | TextureUsage m_Usage; |
| 76 | |
| 77 | virtual void ScaleImageToSurface(bool scaleS=true, bool scaleT=true); |
| 78 | virtual void ClampImageToSurfaceS(); |
| 79 | virtual void ClampImageToSurfaceT(); |
| 80 | |
| 81 | virtual LPRICETEXTURE GetTexture() { return m_pTexture; } |
| 82 | |
| 83 | uint32 GetPixelSize(); |
| 84 | TextureFmt GetSurfaceFormat(void); // Surface pixel format... |
| 85 | inline void SetOthersVariables(void) |
| 86 | { |
| 87 | m_bClampedS = m_bScaledS = (m_dwWidth == m_dwCreatedTextureWidth); |
| 88 | m_bClampedT = m_bScaledT = (m_dwHeight == m_dwCreatedTextureHeight); |
| 89 | } |
| 90 | |
| 91 | // Provides access to "surface" |
| 92 | virtual bool StartUpdate(DrawInfo *di)=0; |
| 93 | virtual void EndUpdate(DrawInfo *di)=0; |
| 94 | |
| 95 | virtual void RestoreAlphaChannel(void); // Restore Alpha channel from RGB channel |
| 96 | |
| 97 | protected: |
| 98 | CTexture(uint32 dwWidth, uint32 dwHeight, TextureUsage usage = AS_NORMAL); |
| 99 | LPRICETEXTURE m_pTexture; |
| 100 | TextureFmt m_dwTextureFmt; |
| 101 | }; |
| 102 | |
| 103 | #endif |
| 104 | |