qcam: viewfinder_gl: Take color space into account for YUV rendering

Update the YUV shaders and the viewfinder_gl to correctly take the
Y'CbCr encoding and the quantization range into account when rendering
YUV formats to RGB. Support for the primaries and transfer function will
be added in a subsequent step.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Kunal Agarwal <kunalagarwal1072002@gmail.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/qcam/viewfinder_gl.h b/src/qcam/viewfinder_gl.h
index 798830a3..68c2912d 100644
--- a/src/qcam/viewfinder_gl.h
+++ b/src/qcam/viewfinder_gl.h
@@ -57,6 +57,7 @@ protected:
 
 private:
 	bool selectFormat(const libcamera::PixelFormat &format);
+	void selectColorSpace(const libcamera::ColorSpace &colorSpace);
 
 	void configureTexture(QOpenGLTexture &texture);
 	bool createFragmentShader();
@@ -67,6 +68,7 @@ private:
 	/* Captured image size, format and buffer */
 	libcamera::FrameBuffer *buffer_;
 	libcamera::PixelFormat format_;
+	libcamera::ColorSpace colorSpace_;
 	QSize size_;
 	unsigned int stride_;
 	Image *image_;