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metal: Make sure we have a command buffer available before trying to present. 

This fixes a case where you render to the backbuffer, then render to a render
target, set the current target back to the backbuffer, and then present
without drawing anything else; in this circumstance, the Present command
would never happen.

Fixes Bugzilla #5011.
This commit is contained in:
Ryan C. Gordon 2020-07-17 11:16:35 -04:00
parent b5affd12e6
commit b7a4fdd318
1 changed files with 2 additions and 0 deletions
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2
src/render/metal/SDL_render_metal.m
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@ -1518,6 +1518,8 @@ METAL_RenderPresent(SDL_Renderer * renderer)
{ @autoreleasepool { { @autoreleasepool {
METAL_RenderData *data = (__bridge METAL_RenderData *) renderer->driverdata; METAL_RenderData *data = (__bridge METAL_RenderData *) renderer->driverdata;
METAL_ActivateRenderCommandEncoder(renderer, MTLLoadActionLoad, NULL, nil);
if (data.mtlcmdencoder != nil) { if (data.mtlcmdencoder != nil) {
[data.mtlcmdencoder endEncoding]; [data.mtlcmdencoder endEncoding];
} }