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metal: Added some comments and FIXMEs.

This commit is contained in:
Ryan C. Gordon 2017-12-09 03:27:52 -05:00
parent dbce1341d5
commit 85d12d8f21
1 changed files with 8 additions and 2 deletions
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10
src/render/metal/SDL_render_metal.m
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@ -91,7 +91,12 @@ SDL_RenderDriver METAL_RenderDriver = {
(SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC | SDL_RENDERER_TARGETTEXTURE),
2,
{SDL_PIXELFORMAT_ARGB8888, SDL_PIXELFORMAT_ABGR8888},
4096, // !!! FIXME: how do you query Metal for this?
// !!! FIXME: how do you query Metal for this?
// (the weakest GPU supported by Metal on iOS has 4k texture max, and
// other models might be 2x or 4x more. On macOS, it's 16k across the
// board right now.)
4096,
4096}
};
@ -285,7 +290,7 @@ METAL_CreateRenderer(SDL_Window * window, Uint32 flags)
data.mtllayer = layer;
data.mtlcmdqueue = [data.mtldevice newCommandQueue];
data.mtlcmdqueue.label = @"SDL Metal Renderer";
data.mtlpassdesc = [MTLRenderPassDescriptor renderPassDescriptor]; // !!! FIXME: is this autoreleased?
data.mtlpassdesc = [MTLRenderPassDescriptor renderPassDescriptor];
NSError *err = nil;
@ -694,6 +699,7 @@ METAL_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
Uint32 pixel_format, void * pixels, int pitch)
{ @autoreleasepool {
METAL_ActivateRenderer(renderer);
// !!! FIXME: this probably needs to commit the current command buffer, and probably waitUntilCompleted
METAL_RenderData *data = (__bridge METAL_RenderData *) renderer->driverdata;
MTLRenderPassColorAttachmentDescriptor *colorAttachment = data.mtlpassdesc.colorAttachments[0];
id<MTLTexture> mtltexture = colorAttachment.texture;