142 lines
4.7 KiB
C++
142 lines
4.7 KiB
C++
//===== Copyright © 1996-2005, Valve Corporation, All rights reserved. ======//
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//
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// Purpose:
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//
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// $NoKeywords: $
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//
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//===========================================================================//
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#ifndef ITEXTURE_H
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#define ITEXTURE_H
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#ifdef _WIN32
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#pragma once
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#endif
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#include "tier0/platform.h"
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#include "bitmap/imageformat.h" // ImageFormat defn.
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class IVTFTexture;
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class ITexture;
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struct Rect_t;
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#ifdef _X360
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enum RTMultiSampleCount360_t
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{
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RT_MULTISAMPLE_NONE = 0,
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RT_MULTISAMPLE_2_SAMPLES = 2,
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RT_MULTISAMPLE_4_SAMPLES = 4,
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RT_MULTISAMPLE_MATCH_BACKBUFFER
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};
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#endif
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//-----------------------------------------------------------------------------
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// This will get called on procedural textures to re-fill the textures
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// with the appropriate bit pattern. Calling Download() will also
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// cause this interface to be called. It will also be called upon
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// mode switch, or on other occasions where the bits are discarded.
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//-----------------------------------------------------------------------------
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abstract_class ITextureRegenerator
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{
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public:
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// This will be called when the texture bits need to be regenerated.
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// Use the VTFTexture interface, which has been set up with the
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// appropriate texture size + format
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// The rect specifies which part of the texture needs to be updated
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// You can choose to update all of the bits if you prefer
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virtual void RegenerateTextureBits( ITexture *pTexture, IVTFTexture *pVTFTexture, Rect_t *pRect ) = 0;
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// This will be called when the regenerator needs to be deleted
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// which will happen when the texture is destroyed
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virtual void Release() = 0;
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};
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abstract_class ITexture
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{
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public:
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// Various texture polling methods
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virtual const char *GetName( void ) const = 0;
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virtual int GetMappingWidth() const = 0;
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virtual int GetMappingHeight() const = 0;
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virtual int GetActualWidth() const = 0;
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virtual int GetActualHeight() const = 0;
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virtual int GetNumAnimationFrames() const = 0;
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virtual bool IsTranslucent() const = 0;
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virtual bool IsMipmapped() const = 0;
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virtual void GetLowResColorSample( float s, float t, float *color ) const = 0;
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// Gets texture resource data of the specified type.
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// Params:
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// eDataType type of resource to retrieve.
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// pnumBytes on return is the number of bytes available in the read-only data buffer or is undefined
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// Returns:
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// pointer to the resource data, or NULL
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virtual void *GetResourceData( uint32 eDataType, size_t *pNumBytes ) const = 0;
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// Methods associated with reference count
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virtual void IncrementReferenceCount( void ) = 0;
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virtual void DecrementReferenceCount( void ) = 0;
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inline void AddRef() { IncrementReferenceCount(); }
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inline void Release() { DecrementReferenceCount(); }
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// Used to modify the texture bits (procedural textures only)
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virtual void SetTextureRegenerator( ITextureRegenerator *pTextureRegen, bool releaseExisting = true ) = 0;
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// Reconstruct the texture bits in HW memory
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// If rect is not specified, reconstruct all bits, otherwise just
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// reconstruct a subrect.
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virtual void Download( Rect_t *pRect = 0 ) = 0;
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// Uses for stats. . .get the approximate size of the texture in it's current format.
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virtual int GetApproximateVidMemBytes( void ) const = 0;
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// Returns true if the texture data couldn't be loaded.
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virtual bool IsError() const = 0;
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// NOTE: Stuff after this is added after shipping HL2.
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// For volume textures
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virtual bool IsVolumeTexture() const = 0;
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virtual int GetMappingDepth() const = 0;
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virtual int GetActualDepth() const = 0;
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virtual ImageFormat GetImageFormat() const = 0;
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// Various information about the texture
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virtual bool IsRenderTarget() const = 0;
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virtual bool IsCubeMap() const = 0;
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virtual bool IsNormalMap() const = 0;
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virtual bool IsProcedural() const = 0;
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virtual void DeleteIfUnreferenced() = 0;
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#if defined( _X360 )
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virtual bool ClearTexture( int r, int g, int b, int a ) = 0;
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virtual bool CreateRenderTargetSurface( int width, int height, ImageFormat format, bool bSameAsTexture, RTMultiSampleCount360_t multiSampleCount = RT_MULTISAMPLE_NONE ) = 0;
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#endif
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// swap everything except the name with another texture
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virtual void SwapContents( ITexture *pOther ) = 0;
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// Retrieve the vtf flags mask
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virtual unsigned int GetFlags( void ) const = 0;
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// Force LOD override (automatically downloads the texture)
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virtual void ForceLODOverride( int iNumLodsOverrideUpOrDown ) = 0;
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// Force exclude override (automatically downloads the texture)
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virtual void ForceExcludeOverride( int iExcludeOverride ) = 0;
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};
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inline bool IsErrorTexture( ITexture *pTex )
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{
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return !pTex || pTex->IsError();
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}
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#endif // ITEXTURE_H
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