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Rendering to textures in DirectX 9...

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Started by AngryMan October 15, 2003 11:07 AM

6 comments, last by AngryMan 20 years, 6 months ago

AngryMan

122

Author

October 15, 2003 11:07 AM

I have a big problem. I''m implementing texture based font engine, and to draw strings, it must prepare string texture by copying small pieces (characters) from bitmap font to new texture. The problem is, I don''t know how can I render from one texture to another! Could someone please help me? (I''m using D3D9)

Nik02

4,359

October 15, 2003 11:31 AM

D3DXLoadSurfaceFromSurface()

Niko Suni

AngryMan

122

Author

October 15, 2003 11:42 AM

Well, in that case - can I convert surface to texture?

Nik02

4,359

October 15, 2003 11:47 AM

It''s not practical in your case; use IDirect3DTexture9::GetSurfaceLevel() instead.

Niko Suni

AngryMan

122

Author

October 15, 2003 12:03 PM

But I''m using D3DXSPRITE to draw font, and as far as I know, it can only draw from textures. BTW, I''m programming in D3D for few months only, and this is my first encounter with surfaces. What''s the difference between textures and surfaces?

Nik02

4,359

October 15, 2003 12:09 PM

A texture contains one or more surfaces, depending on whether it has mipmap levels stored in it.
Level 0 surface is the texture''s first surface, you should copy the data into it.

To get the surface interface pointer (pSurf) from the texture''s first level, use IDirect3DTexture9::GetSurfaceLevel(0, &pSurf), copy the text to the said surface, and release the pSurf.