mirror of https://github.com/minetest/irrlicht.git
149 lines
3.7 KiB
C++
149 lines
3.7 KiB
C++
// Copyright (C) 2002-2012 Nikolaus Gebhardt / Thomas Alten
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// This file is part of the "Irrlicht Engine".
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// For conditions of distribution and use, see copyright notice in irrlicht.h
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#ifndef __C_SOFTWARE_2_TEXTURE_H_INCLUDED__
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#define __C_SOFTWARE_2_TEXTURE_H_INCLUDED__
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#include "SoftwareDriver2_compile_config.h"
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#include "ITexture.h"
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#include "IRenderTarget.h"
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#include "CImage.h"
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namespace irr
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{
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namespace video
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{
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class CBurningVideoDriver;
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/*!
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interface for a Video Driver dependent Texture.
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*/
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struct CSoftwareTexture2_Bound
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{
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f32 w; // width - 0.5f;
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f32 h; // height- 0.5f;
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f32 cx; // texelcenter x 1.f/width*0.5f
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f32 cy; // texelcenter y 1.f/height*0.5f
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};
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class CSoftwareTexture2 : public ITexture
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{
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public:
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//! constructor
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enum eTex2Flags
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{
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GEN_MIPMAP = 1, // has mipmaps
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GEN_MIPMAP_AUTO = 2, // automatic mipmap generation
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IS_RENDERTARGET = 4,
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ALLOW_NPOT = 8, //allow non power of two
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IMAGE_IS_LINEAR = 16,
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TEXTURE_IS_LINEAR = 32,
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};
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CSoftwareTexture2(IImage* surface, const io::path& name, u32 flags /*eTex2Flags*/, CBurningVideoDriver* driver);
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//! destructor
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virtual ~CSoftwareTexture2();
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u32 getMipmapLevel(s32 newLevel) const
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{
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if ( newLevel < 0 ) newLevel = 0;
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else if ( newLevel >= SOFTWARE_DRIVER_2_MIPMAPPING_MAX ) newLevel = SOFTWARE_DRIVER_2_MIPMAPPING_MAX - 1;
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while ( newLevel > 0 && MipMap[newLevel] == 0 ) newLevel -= 1;
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return newLevel;
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}
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//! lock function
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virtual void* lock(E_TEXTURE_LOCK_MODE mode, u32 mipmapLevel, u32 layer, E_TEXTURE_LOCK_FLAGS lockFlags = ETLF_FLIP_Y_UP_RTT) _IRR_OVERRIDE_
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{
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if (Flags & GEN_MIPMAP)
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{
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//called from outside. must test
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MipMapLOD = getMipmapLevel(mipmapLevel);
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Size = MipMap[MipMapLOD]->getDimension();
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Pitch = MipMap[MipMapLOD]->getPitch();
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}
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return MipMap[MipMapLOD]->getData();
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}
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//! unlock function
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virtual void unlock() _IRR_OVERRIDE_
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{
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}
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//! compare the area drawn with the area of the texture
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f32 getLODFactor( const f32 texArea ) const
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{
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return MipMap0_Area[0]* MipMap0_Area[1] * 0.5f * texArea;
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//return MipMap[0]->getImageDataSizeInPixels () * texArea;
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}
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const u32* getMipMap0_Area() const
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{
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return MipMap0_Area;
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}
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//! returns unoptimized surface (misleading name. burning can scale down originalimage)
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virtual CImage* getImage() const
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{
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return MipMap[0];
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}
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//! returns texture surface
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virtual CImage* getTexture() const
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{
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return MipMap[MipMapLOD];
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}
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//precalculated dimx-1/dimx*0.5f
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const CSoftwareTexture2_Bound& getTexBound() const
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{
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return TexBound[MipMapLOD];
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}
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virtual void regenerateMipMapLevels(void* data = 0, u32 layer = 0) _IRR_OVERRIDE_;
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f32 get_lod_bias() const { return LodBIAS; }
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private:
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void calcDerivative();
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//! controls MipmapSelection. relation between drawn area and image size
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u32 MipMapLOD; // 0 .. original Texture pot -SOFTWARE_DRIVER_2_MIPMAPPING_MAX
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u32 Flags; //eTex2Flags
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CBurningVideoDriver* Driver;
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CImage* MipMap[SOFTWARE_DRIVER_2_MIPMAPPING_MAX];
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CSoftwareTexture2_Bound TexBound[SOFTWARE_DRIVER_2_MIPMAPPING_MAX];
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u32 MipMap0_Area[2];
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f32 LodBIAS;
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};
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/*!
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interface for a Video Driver dependent render target.
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*/
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class CSoftwareRenderTarget2 : public IRenderTarget
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{
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public:
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CSoftwareRenderTarget2(CBurningVideoDriver* driver);
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virtual ~CSoftwareRenderTarget2();
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virtual void setTexture(const core::array<ITexture*>& texture, ITexture* depthStencil, const core::array<E_CUBE_SURFACE>& cubeSurfaces) _IRR_OVERRIDE_;
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ITexture* getTexture() const;
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protected:
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CBurningVideoDriver* Driver;
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};
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} // end namespace video
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} // end namespace irr
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#endif // __C_SOFTWARE_2_TEXTURE_H_INCLUDED__
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