mirror of
https://github.com/libsdl-org/SDL.git
synced 2024-12-05 01:33:32 +08:00
13 lines
584 B
Plaintext
13 lines
584 B
Plaintext
This example creates an SDL window and renderer, and draws a
|
|
rotating texture to it, reads back the rendered pixels, converts them to
|
|
black and white, and then draws the converted image to a corner of the
|
|
screen.
|
|
|
|
This isn't necessarily an efficient thing to do--in real life one might
|
|
want to do this sort of thing with a render target--but it's just a visual
|
|
example of how to use SDL_RenderReadPixels().
|
|
|
|
A better, but less visual, use of SDL_RenderReadPixels() is to make
|
|
screenshots: you grab the current contents of the screen, and save the pixels
|
|
as a bitmap file or whatever.
|