Rotate the viewfinder & Capture a portrait image in Windows Phone

[small2]

Hi,all

I'm creating a camera app based on Silverlight/XNA framework as the yan_ 's example Use Camera with XNA, but in when the page oritation changed to the Portrait , the viewfinder of camera dose not shows correctly, the direction of viewfinder dose not rotate when the page oritation changed, and the captured picture is also in landscape layout(width > height),not portrait layout(height > width ).

How could I rotate the viewfinder when the page oritation changed to portrait and capture a portrait layout picture.

If you don't understand what I said, just check out this similarly post on MSDN forum:video recorder sample - viewfinder orientation issue

Could anyone give me a hand, thanks in advance.

Regards.

[izinin]

Hi

Please check this post where your problem is solved

[small2]

I had solved the second problem: capture a portrait layout picture.
Here is the solution:http://timheuer.com/blog/archive/201...-rotation.aspx

[small2]

Hi, thanks for the reply, I had read the post before, and it was not fit for me. It was used in Silverlight Framework, not SL/XNA mixed framework. As the example by Yan, in Sl/XNA, he used the previewbuffer data comes from the camera to fill a texture, and render it on the screen. I also tried to change the oritation of the teture., but it dose not woks. And I had no idea yet.

[small2]

Hi

Please check this post where your problem is solved

Hi, thanks for the reply, I had read the post before, and it was not fit for me. It was used in Silverlight Framework, not SL/XNA mixed framework. As the example by Yan, in Sl/XNA, he used the previewbuffer data comes from the camera to fill a texture, and render it on the screen. I also tried to change the oritation of the teture., but it dose not woks. And I had no idea yet.

[yan_]

Hi, thanks for the reply, I had read the post before, and it was not fit for me. It was used in Silverlight Framework, not SL/XNA mixed framework. As the example by Yan, in Sl/XNA, he used the previewbuffer data comes from the camera to fill a texture, and render it on the screen. I also tried to change the oritation of the teture., but it dose not woks. And I had no idea yet.

Hi.
previewBuffer don't use orientation information. It's you which must manage it.
To display , you only need add a rotation when you draw the texture.

To save it, it's depend what you save.
- If it's the previewBuffer, you must make the orientation. Look RotateStream in this article : http://timheuer.com/blog/archive/201...-rotation.aspx
- You can render your scene to a RenderTarget2D.
- You can take a picture to have a better texture.

[small2]

Hi.
previewBuffer don't use orientation information. It's you which must manage it.
To display , you only need add a rotation when you draw the texture.

To save it, it's depend what you save.
- If it's the previewBuffer, you must make the orientation. Look RotateStream in this article : http://timheuer.com/blog/archive/201...-rotation.aspx
- You can render your scene to a RenderTarget2D.
- You can take a picture to have a better texture.

Hi, I had solved the second problem yet.
I tried to add a rotation when I draw the texture like this.

Microsoft.Xna.Framework.Rectangle rec2 = new Microsoft.Xna.Framework.Rectangle(0, 0, (int)ActualHeight, (int)ActualWidth - 90);
 _spriteBatch.Draw(_cameraTexture, rec2, null, Microsoft.Xna.Framework.Color.White, (float)Math.PI / 2, new Vector2(_cameraTexture.Width / 2, _cameraTexture.Height/2), SpriteEffects.None, 0);

but the viewfinder showed like this:

[yan_]

your picture is not displayed...
look example. You must set screen position of texture origin :

Vector2 origin = new Vector2(CameraTexture.Width / 2, CameraTexture.Height / 2); // texture  origin
Vector2 screenpos = new Vector2(240, 400); // origin position on screen
spriteBatch.Draw(CameraTexture, screenpos, null, Microsoft.Xna.Framework.Color.White, (float)Math.PI / 2,           origin, 1.0f, SpriteEffects.None, 0f);

[small2]

your picture is not displayed...
look example. You must set screen position of texture origin :

Vector2 origin = new Vector2(CameraTexture.Width / 2, CameraTexture.Height / 2); // texture  origin
Vector2 screenpos = new Vector2(240, 400); // origin position on screen
spriteBatch.Draw(CameraTexture, screenpos, null, Microsoft.Xna.Framework.Color.White, (float)Math.PI / 2,           origin, 1.0f, SpriteEffects.None, 0f);

Wow, it works. Thanks very much! I had misunderstood your advices before! But it seems like I can't render and fill the fullscreen with the texture(640*480) . What a pity!

[yan_]

But it seems like I can't render and fill the fullscreen with the texture(640*480) . What a pity!

why?
Do you use app bar or systray?