libcamera: software_isp: Add a Size_ member variable to pass to eGL later

We will be initialising eGL from Debayer::start(). We need a copy of the
size data passed in configure() to tell the fragment shaders the right
output size.

Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
Tested-by: Robert Mader <robert.mader@collabora.com>
Tested-by: Hans de Goede <johannes.goede@oss.qualcomm.com> # ThinkPad T14s gen 6 (arm64) ov02c10 + X1c gen 12 ov08x40
Tested-by: Kieran Bingham <kieran.bingham@ideasonboard.com> # Lenovo X13s
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/libcamera/software_isp/debayer.cpp

@@ -300,6 +300,11 @@ Debayer::~Debayer()
  * \brief The output pixel format
  */
 
+/**
+ * \var Debayer::outputSize_
+ * \brief Output size object
+ */
+
 /**
  * \var Debayer::red_
  * \brief Lookup table for red channel gain and correction values

src/libcamera/software_isp/debayer.h

@@ -75,6 +75,7 @@ public:
 
 	DebayerInputConfig inputConfig_;
 	DebayerOutputConfig outputConfig_;
+	Size outputSize_;
 	PixelFormat inputPixelFormat_;
 	PixelFormat outputPixelFormat_;
 	DebayerParams::LookupTable red_;