CODEWITHSUNDEEP
androidimagecanvasopengl-es
Azurai
Azurai

Reputation: 107

Android OpenGL.ES Texture/Image Drawing

I have recently started into learning OpenGL ES, learning from 1.0, working to 2.0.

My question is this, I know how to render two triangles(sharing one vertex coordination) to create a square/rectangle. And adding a texture to that, the size of the image. To seamlessly create an image on the 'canvas'. Is this the correct way of putting a graphic image on the screen, or is there a method that I can use to put one on?

In other words: Android API has::

canvas.drawBitmap(bitmap, x, y, filter);

Does OpenGL ES 1.0+ or 2.0 have a separate method to place a Bitmap image on the screen?

Upvotes: 0

Views: 612

Answers (1)

Reto Koradi
Reto Koradi

Reputation: 54642

Not really, no. There are a couple of extensions that more directly support functionality similar to what you're describing:

http://www.khronos.org/registry/gles/extensions/OES/OES_draw_texture.txt http://www.khronos.org/registry/gles/extensions/NV/draw_texture.txt

But with standard API calls, what you're describing is the right way to display an image.

OpenGL ES 3.0 has glBlitFramebuffer(), which is another option that could be used for this. But this is not in ES 1.1 and ES 2.0.

Full OpenGL used to have a glDrawPixels() function, but this is also deprecated in modern OpenGL versions.

Upvotes: 1

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