Hello , all:
Now , I'm learning IDirectFBSurface and have a question about
TextureTriangles ,
I want to map one texture to surface of layer and the texture already
load one picture. But after use TextureTriangles (), I can't see any image
in the screen .
I don't know how to use this fuction? Hope someone help me .
The following is my code:
.......
/* the super interface */
static IDirectFB *dfb;
/* the primary surface (surface of primary layer) */
static IDirectFBSurface *primary;
/* The texture surface. */
static IDirectFBSurface *texture;
int main()
{
float left = 0.0f;
float right = 256.0f;
float top = 0.0f;
float bottom = 256.0f;
int indices[]={0, 1, 3, 1, 3, 2 };
static DFBVertex vertices[] = {
{ left, top, 0.5f, 1.0f, 0.0f, 0.0f }, // x, y, z, rhw, u, v
{ right, top, 0.5f, 1.0f, 1.0f, 0.0f },
{ right, bottom, 0.5f, 1.0f, 1.0f, 1.0f },
{ left, top, 0.5f, 1.0f, 0.0f, 0.0f},
{ right, bottom, 0.5f, 1.0f, 1.0f, 1.0f },
{ left, bottom, 0.5f, 1.0f, 0.0f, 1.0f },
};
..................
dfb->CreateSurface( dfb, &sdsc, &primary );
dfb->CreateImageProvider( dfb, "texture.png",&pw );
pw->GetSurfaceDescription (pw, &dsc);
dfb->CreateSurface (dfb, &dsc, &texture);
pw->RenderTo( pw, texture, NULL );
pw->Release (pw);
primary ->TextureTriangles(primary , texture, vertices, indices, 6,
DTTF_LIST );
primary->Flip( myteprimary , NULL,DSFLIP_WAITFORSYNC );
}
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