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Use raw MTLBuffer for texture uploads.

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There's a fair bit of overhead to setting up a GrMtlBuffer (adding it
to the resource cache, etc.) that isn't necessary in this case when
using a temporary buffer. Overall it gives about 10% improvement in
uploadToTexture().

Change-Id: I99449c9001098c90743cba8d614007db307156d3
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/230131
Commit-Queue: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
This commit is contained in:
Jim Van Verth 2019-07-29 09:20:30 -04:00 committed by Skia Commit-Bot
parent 3da607ec72
commit 96827b125f
1 changed files with 9 additions and 9 deletions
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18
src/gpu/mtl/GrMtlGpu.mm
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@ -252,15 +252,13 @@ bool GrMtlGpu::uploadToTexture(GrMtlTexture* tex, int left, int top, int width,
return true;
}
sk_sp<GrMtlBuffer> transferBuffer = GrMtlBuffer::Make(this, combinedBufferSize,
GrGpuBufferType::kXferCpuToGpu,
kStream_GrAccessPattern);
size_t bufferOffset;
id<MTLBuffer> transferBuffer = this->resourceProvider().getDynamicBuffer(combinedBufferSize,
&bufferOffset);
if (!transferBuffer) {
return false;
}
char* buffer = (char*) transferBuffer->map();
size_t bufferOffset = transferBuffer->offset();
char* buffer = (char*) transferBuffer.contents + bufferOffset;
currentWidth = width;
currentHeight = height;
@ -274,12 +272,12 @@ bool GrMtlGpu::uploadToTexture(GrMtlTexture* tex, int left, int top, int width,
const size_t trimRowBytes = currentWidth * bpp;
const size_t rowBytes = texels[currentMipLevel].fRowBytes;
// copy data into the buffer, skipping the trailing bytes
// copy data into the buffer, skipping any trailing bytes
char* dst = buffer + individualMipOffsets[currentMipLevel];
const char* src = (const char*)texels[currentMipLevel].fPixels;
SkRectMemcpy(dst, trimRowBytes, src, rowBytes, trimRowBytes, currentHeight);
[blitCmdEncoder copyFromBuffer: transferBuffer->mtlBuffer()
[blitCmdEncoder copyFromBuffer: transferBuffer
sourceOffset: bufferOffset + individualMipOffsets[currentMipLevel]
sourceBytesPerRow: trimRowBytes
sourceBytesPerImage: trimRowBytes*currentHeight
@ -293,7 +291,9 @@ bool GrMtlGpu::uploadToTexture(GrMtlTexture* tex, int left, int top, int width,
currentHeight = SkTMax(1, currentHeight/2);
layerHeight = currentHeight;
}
transferBuffer->unmap();
#ifdef SK_BUILD_FOR_MAC
[transferBuffer didModifyRange: NSMakeRange(bufferOffset, combinedBufferSize)];
#endif
if (mipLevelCount < (int) tex->mtlTexture().mipmapLevelCount) {
tex->texturePriv().markMipMapsDirty();