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4 Commits

Author SHA1 Message Date
Elias Naur d9212263aa app/headless: prepare OpenGL context on macOS 
The macOS backend uses a desktop OpenGL context, not a OpenGL ES
context. The main difference is that sRGB have to be enabled and
a vertex buffer must be bound.

Do that and fix Window.Screenshot for scenes more complex than a
glClear.

Signed-off-by: Elias Naur <mail@eliasnaur.com>
 2019-12-04 00:29:43 +01:00
Elias Naur 6fbdefa21f app/headless: compensate for OpenGL's lower left origin 
The origin of image.Images is the upper left corner. Convert the
ReadPixels result by flipping the image the y-direction.

Signed-off-by: Elias Naur <mail@eliasnaur.com>
 2019-12-02 13:59:34 +01:00
Elias Naur 41116b5cb8 app/headless: add package docs 
Signed-off-by: Elias Naur <mail@eliasnaur.com>
 2019-12-02 00:05:30 +01:00
Elias Naur 0b84137f40 app/headless: implement headless windows 
Signed-off-by: Elias Naur <mail@eliasnaur.com>
 2019-12-01 23:40:02 +01:00