hm... still doesn't work. the bitmap stays black. any ideas?



<edit>

it works now:

((LPDIRECT3DTEXTURE9)bmap_lightmap->d3dtex)->Release();
bmap_lightmap->d3dtex = pTargetTexture;
bmap_lightmap->flags |= (1<<15); // why do i need a () here in lite-c?
bmap_lightmap->flags &= ~(1<<27);

i found the reason only with visualc++ since it has much more helpful error messages. (left operand must be l-value!)

</edit>

after i have rendered to the texture i would like to access individual pixels. unfortunately render targets can't be locked and unlocked.

any ideas how i could copy the content of the render target to a normal texture?

i tried to draw a textured quad to a texture.

Code:

---

LPDIRECT3DTEXTURE9 pBackgroundTexture;
D3DXCreateTextureFromFile(device, "test.tga", &pBackgroundTexture);	
...
device->SetTexture(0, pBackgroundTexture);
drawquad();

---

why does this work?

Code:

---

LPDIRECT3DTEXTURE9 pBackgroundTexture = (LPDIRECT3DTEXTURE9)bmap_background->d3dtex;
...
device->SetTexture(0, pBackgroundTexture);
drawquad();

---

why does this not work?

The difference is how you created the LPDIRECT3DTEXTURE9. I don't know what drawquad() does, but you can not, for instance, directly draw into render targets without creating them as lockable. The various restrictions of different types of textures are described in the DirectX manual.

Code:

---

void drawquad()
{
	device->SetFVF(TEXTUREDVERTEXFVF);
	
	TEXTUREDVERTEX v[4];

	v[0].x = 0;
	v[0].y = 0;
	v[0].z = 0;
	v[0].u = 0;
	v[0].v = 0;
				
	v[1].x = 512;
	v[1].y = 0;
	v[1].z = 0;
	v[1].u = 1;
	v[1].v = 0;
				
	v[2].x = 512;
	v[2].y = 512;
	v[2].z = 0;
	v[2].u = 1;
	v[2].v = 1;
	
	v[3].x = 0;
	v[3].y = 512;
	v[3].z = 0;
	v[3].u = 0;
	v[3].v = 1;
				
	device->DrawPrimitiveUP(D3DPT_TRIANGLEFAN, 2, (LPVOID)v, sizeof(TEXTUREDVERTEX));
}

---

the texture i created myself works. the texture of the 3dgs bitmap doesn't work. isn't the texture of a 3dgs bitmap lockable?

...
do you also have some suggestion regarding my other question? can i copy content from a render target to a lockable texture somehow?

If you want to render into a DirectX texture, you need to create it as render target. - For copying content between DirectX textures, use the LockRect() function to get a pointer on the content.

yes, i have a working render target. that was what the thread originally was about and thanks to your help that problem seems to be solved.

now i simply would like to render some textured geometry but a 3dgs bitmap->d3dtex doesn't work if i set it to be the texture. the drawn geometry stays black then. it works with a directx texture i created myself though!

Quote:

---

For copying a content between DirectX textures, use the LockRect() function to get a pointer on the content.

---

i would like to copy from a render target to a normal texture. since a render target is in D3DPOOL_DEFAULT it is not lockable according to the directx manual. is there some trick to copy something nevertheless?

<edit> i just came across IDirect3DDevice9::GetRenderTargetData which i didn't notice before and will try that! </edit>