void tglMakeCurrent(TGlContext context)
{
if (context)
reinterpret_cast<QGLContext *>(context)->makeCurrent();
else
tglDoneCurrent(tglGetCurrentContext());
}
DrawableTextureDataP texture_utils::getTextureData(const TXsheet *xsh,
int frame) {
// Check if an xsheet texture already exists
const std::string &texId = ::getImageId(xsh, frame);
DrawableTextureDataP data(
TTexturesStorage::instance()->getTextureData(texId));
if (data) return data;
// No available texture - we must build and load it
TRaster32P tex(
1024,
1024); // Fixed texture size. It's the same that currently happens with
// vector images' textures - and justified since this is camstand
// mode, and besides we want to make sure that textures are limited.
// Retrieve the sub-xsheet bbox (world coordinates of the sub-xsheet)
TRectD bbox(xsh->getBBox(frame));
// Since xsh represents a sub-xsheet, its camera affine must be applied
const TAffine &cameraAff =
xsh->getPlacement(xsh->getStageObjectTree()->getCurrentCameraId(), frame);
bbox = (cameraAff.inv() * bbox).enlarge(1.0);
// Render the xsheet on the specified bbox
#ifdef MACOSX
xsh->getScene()->renderFrame(tex, frame, xsh, bbox, TAffine());
#else
// The call below will change context (I know, it's a shame :( )
TGlContext currentContext = tglGetCurrentContext();
{
tglDoneCurrent(currentContext);
xsh->getScene()->renderFrame(tex, frame, xsh, bbox, TAffine());
tglMakeCurrent(currentContext);
}
#endif
TRop::depremultiply(tex); // Stored textures are rendered nonpremultiplied
// Store the texture for future retrieval
return TTexturesStorage::instance()->loadTexture(texId, tex, bbox);
}
