void activateAndClearTarget(ImageOutport& outport, ImageType type) {
activateTarget(outport, type);
clearCurrentTarget();
}
void activateAndClearTarget(Image& image, ImageType type) {
activateTarget(image, type);
clearCurrentTarget();
}
void GLTexture::download(Bitmap *bitmap) {
if (bitmap == NULL)
bitmap = getBitmap();
Assert(bitmap != NULL);
activateTarget();
GLenum format, dataFormat;
switch (bitmap->getComponentFormat()) {
case Bitmap::EUInt8: dataFormat = GL_UNSIGNED_BYTE; break;
case Bitmap::EUInt16: dataFormat = GL_UNSIGNED_SHORT; break;
case Bitmap::EUInt32: dataFormat = GL_UNSIGNED_INT; break;
case Bitmap::EFloat16: dataFormat = GL_HALF_FLOAT_ARB; break;
case Bitmap::EFloat32: dataFormat = GL_FLOAT; break;
case Bitmap::EFloat64: dataFormat = GL_DOUBLE; break;
default:
Log(EError, "GLTexture::download(): Unknown/unsupported component format %i!",
(int) bitmap->getComponentFormat());
return;
}
switch (bitmap->getPixelFormat()) {
case Bitmap::ELuminance:
if (m_fbType == EDepthBuffer)
format = GL_DEPTH_COMPONENT;
else
format = GL_LUMINANCE;
break;
case Bitmap::ELuminanceAlpha: format = GL_LUMINANCE_ALPHA; break;
case Bitmap::ERGB: format = GL_RGB; break;
case Bitmap::ERGBA: format = GL_RGBA; break;
default:
Log(EError, "GLTexture::download(): Unknown/unsupported pixel format %i!",
(int) bitmap->getPixelFormat());
return;
}
glPixelStorei(GL_PACK_ALIGNMENT, 1);
switch (m_type) {
case ETexture2D:
glReadPixels(0, 0, bitmap->getWidth(), bitmap->getHeight(), format,
dataFormat, bitmap->getUInt8Data());
/* OpenGL associates (0, 0) with the lower left position and
the resulting bitmap must thus be vertically flipped. */
bitmap->flipVertically();
break;
case ETextureCubeMap:
for (int i=0; i<6; ++i) {
activateSide(i);
bitmap = getBitmap(i);
glReadPixels(0, 0, bitmap->getWidth(), bitmap->getHeight(), format,
dataFormat, bitmap->getUInt8Data());
bitmap->flipVertically();
}
break;
default:
Log(EError, "download(): Unsupported texture type!");
}
releaseTarget();
}
