Method TextureCopyRect

Source/DX9VideoProcessor.cpp:2798–2856

HRESULT CDX9VideoProcessor::TextureCopyRect(
	IDirect3DTexture9* pTexture, const CRect& srcRect, const CRect& dstRect,
	D3DTEXTUREFILTERTYPE filter, const int iRotation, const bool bFlip)
{
	HRESULT hr;

	D3DSURFACE_DESC desc;
	if (!pTexture || FAILED(pTexture->GetLevelDesc(0, &desc))) {
		return E_FAIL;
	}

	const float dx = 1.0f / desc.Width;
	const float dy = 1.0f / desc.Height;

	POINT points[4];
	switch (iRotation) {
	case 90:
		points[0] = { dstRect.right, dstRect.top    };
		points[1] = { dstRect.right, dstRect.bottom };
		points[2] = { dstRect.left,  dstRect.top    };
		points[3] = { dstRect.left,  dstRect.bottom };
		break;
	case 180:
		points[0] = { dstRect.right, dstRect.bottom };
		points[1] = { dstRect.left,  dstRect.bottom };
		points[2] = { dstRect.right, dstRect.top    };
		points[3] = { dstRect.left,  dstRect.top    };
		break;
	case 270:
		points[0] = { dstRect.left,  dstRect.bottom };
		points[1] = { dstRect.left,  dstRect.top    };
		points[2] = { dstRect.right, dstRect.bottom };
		points[3] = { dstRect.right, dstRect.top    };
		break;
	default:
		points[0] = { dstRect.left,  dstRect.top    };
		points[1] = { dstRect.right, dstRect.top    };
		points[2] = { dstRect.left,  dstRect.bottom };
		points[3] = { dstRect.right, dstRect.bottom };
		break;
	}

	if (bFlip) {
		std::swap(points[0], points[1]);
		std::swap(points[2], points[3]);
	}

	MYD3DVERTEX<1> v[] = {
		{ {(float)points[0].x - 0.5f, (float)points[0].y - 0.5f, 0.5f, 2.0f}, {{srcRect.left  * dx, srcRect.top    * dy}} },
		{ {(float)points[1].x - 0.5f, (float)points[1].y - 0.5f, 0.5f, 2.0f}, {{srcRect.right * dx, srcRect.top    * dy}} },
		{ {(float)points[2].x - 0.5f, (float)points[2].y - 0.5f, 0.5f, 2.0f}, {{srcRect.left  * dx, srcRect.bottom * dy}} },
		{ {(float)points[3].x - 0.5f, (float)points[3].y - 0.5f, 0.5f, 2.0f}, {{srcRect.right * dx, srcRect.bottom * dy}} },
	};

	hr = m_pD3DDevEx->SetTexture(0, pTexture);
	hr = TextureBlt(m_pD3DDevEx, v, filter);

	return hr;