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camera: Report rotation needed to account for device orientation.

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Fixes #11476.
This commit is contained in:
Ryan C. Gordon 2025-12-02 20:26:08 -05:00
parent 6602f12744
commit 2c11d62d17
12 changed files with 132 additions and 15 deletions
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7
test/testcamera.c
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@ -360,12 +360,17 @@ SDL_AppResult SDL_AppIterate(void *appstate)
texture_updated = true;
}
// the image might be coming from a mobile device that provides images in only one orientation, but the
// device might be rotated to a different one (like an iPhone providing portrait images even if you hold
// the phone in landscape mode). The rotation is how far to rotate the image clockwise to put it right-side
// up, for how the user would expect it to be for how they are holding the device.
const int rotation = (int) SDL_GetNumberProperty(SDL_GetSurfaceProperties(frame_current), SDL_PROP_SURFACE_ROTATION_NUMBER, 0);
SDL_GetRenderOutputSize(renderer, &win_w, &win_h);
d.x = ((win_w - texture->w) / 2.0f);
d.y = ((win_h - texture->h) / 2.0f);
d.w = (float)texture->w;
d.h = (float)texture->h;
SDL_RenderTexture(renderer, texture, NULL, &d);
SDL_RenderTextureRotated(renderer, texture, NULL, &d, rotation, NULL, SDL_FLIP_NONE);
}
/* !!! FIXME: Render a "flip" icon if front_camera and back_camera are both != 0. */