qcam: viewfinder_gl: Support configurable stride in shaders

The RGB and YUV conversion doesn't take the stride into account, neither
when creating the textures, nor when sampling them. Fix it by using the
stride as the texture width, and multiplying the x coordinate in the
vertex shaders by a factor to only sample the active portion of the
image.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/qcam/viewfinder_gl.h b/src/qcam/viewfinder_gl.h
index 2b2b1e86..37b1ddd0 100644
--- a/src/qcam/viewfinder_gl.h
+++ b/src/qcam/viewfinder_gl.h
@@ -97,6 +97,7 @@ private:
 
 	/* Raw Bayer texture parameters */
 	GLuint textureUniformSize_;
+	GLuint textureUniformStrideFactor_;
 	GLuint textureUniformBayerFirstRed_;
 	QPointF firstRed_;