Turn Bilinear Filtering off

This code has been declared by its author to be Public Domain code.

Turn Bilinear Filtering off by jfk EO-11110

2010

Please note: to use this you must have Devils Child's shadow system installed (tested with version 1.3). It contains a decls and 2 DLLs whereof the DX7 wrapper DLL is required for this operation. You can download the Shadow System directly from DC (see also Toolbox), or from the following Link that also includes the sample posted here:
http://www.melog.ch/dl/bb_bilinear_off.zip

; propertiy for DX7_SetTextureStageState
Const     D3DTSS_MAGFILTER      = 16;, /* D3DTEXTUREMAGFILTER filter To use For magnification */
Const     D3DTSS_MINFILTER      = 17;, /* D3DTEXTUREMINFILTER filter To use For minification */
Const     D3DTSS_MIPFILTER      = 18;, /* D3DTEXTUREMIPFILTER filter To use between mipmaps during minification */

;For other things you can do with DX7_SetTextureStageState see any DirectX documention, that is part of the SDK (actually, DX7 and DX8 SDK Docs seem to be ok for this command)
; Constants shoud be listed in the docs, alternatively they are found in d3dtypes.h (aslo part of SDK), with a short description at the line end (as seen here).

;parameters for D3DTEXTUREMAGFILTER
Const    D3DTFG_POINT        = 1;,    // nearest
Const    D3DTFG_LINEAR       = 2;,    // linear interpolation (blitz3d default)
Const    D3DTFG_FLATCUBIC    = 3;,    // cubic
Const    D3DTFG_GAUSSIANCUBIC = 4;,   // different cubic kernel
Const    D3DTFG_ANISOTROPIC  = 5;,    //
Const    D3DTFG_FORCE_DWORD  = $7fffffff;,   // force 32-bit size enum

;parameters for D3DTEXTUREMINFILTER
Const    D3DTFN_POINT        = 1;,    // nearest
Const    D3DTFN_LINEAR       = 2;,    // linear interpolation  (blitz3d default)
Const    D3DTFN_ANISOTROPIC  = 3;,    //
Const    D3DTFN_FORCE_DWORD  = $7fffffff;,   // force 32-bit size enum

;parameters for D3DTEXTUREMIPFILTER
Const    D3DTFP_NONE         = 1;,    // mipmapping disabled (use MAG filter)
Const    D3DTFP_POINT        = 2;,    // nearest
Const    D3DTFP_LINEAR       = 3;,    // linear interpolation  (blitz3d default afaik)
Const    D3DTFP_FORCE_DWORD  = $7fffffff;,   // force 32-bit size enum




Graphics3D 800,600,32,2
SetBuffer BackBuffer()


light=CreateLight()
RotateEntity light,45,45,0
cube=CreateCube()


w=256
tex1=CreateTexture(w,w)
For i=0 To 100000
 Color Rand(255),Rand(255),Rand(255)
 Plot Rand(0,255),Rand(0,255)
Next
EntityTexture cube,tex1



; init DC's extended DX7 wrapper
If DX7_SetSystemProperties(SystemProperty("Direct3D7"), SystemProperty("Direct3DDevice7"), SystemProperty("DirectDraw7"), SystemProperty("AppHWND"), SystemProperty("AppHINSTANCE")) Then RuntimeError "Error initializing dx7."

;DX7_SetTextureStageState%(n,D3DTSS_MINFILTER, D3DTFN_POINT) ; may be useful too
;DX7_SetTextureStageState%(n,D3DTSS_MIPFILTER, D3DTFP_NONE)  ; may be useful too

 DX7_SetTextureStageState%(0,D3DTSS_MAGFILTER, D3DTFG_POINT)  ; turns off bilinear filtering on magnified texels (close to camera texels)
;DX7_SetTextureStageState%(0,D3DTSS_MAGFILTER, D3DTFG_LINEAR) ; restore Blitz3D default setting


CopyRect 0,0,256,256,0,0,BackBuffer(), TextureBuffer(tex1)


camera=CreateCamera()
CameraRange camera,0.001,50
TranslateEntity camera,0,0,-1.5



While KeyHit(1)=0
 TurnEntity cube,0,.1,0
 RenderWorld()
 Flip
 Delay 10
Wend


; de-init DC's extended DX7 wrapper (guess you should not forget that)
DX7_RemoveSystemProperties()


End

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