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Enables blending; attempts to enable frame preservation.

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The latter seems to be evidencing a double buffer at play. More investigation required.

On the plus side, the direct route is still well within GPU budget at 4k on my Core M. So a huge improvement there.
This commit is contained in:
Thomas Harte 2020-08-12 19:34:07 -04:00
parent a136a00a2f
commit 27ca782cac
3 changed files with 16 additions and 4 deletions
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2
OSBindings/Mac/Clock Signal/Base.lproj/MachineDocument.xib
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@ -27,7 +27,7 @@
<rect key="frame" x="0.0" y="0.0" width="600" height="450"/>
<autoresizingMask key="autoresizingMask"/>
<subviews>
<openGLView hidden="YES" wantsLayer="YES" useAuxiliaryDepthBufferStencil="NO" allowOffline="YES" wantsBestResolutionOpenGLSurface="YES" translatesAutoresizingMaskIntoConstraints="NO" id="DEG-fq-cjd" customClass="CSScanTargetView">
<openGLView hidden="YES" wantsLayer="YES" stencilSize="8bit" useAuxiliaryDepthBufferStencil="NO" allowOffline="YES" wantsBestResolutionOpenGLSurface="YES" translatesAutoresizingMaskIntoConstraints="NO" id="DEG-fq-cjd" customClass="CSScanTargetView">
<rect key="frame" x="0.0" y="0.0" width="600" height="450"/>
</openGLView>
<box hidden="YES" boxType="custom" cornerRadius="4" title="Box" titlePosition="noTitle" translatesAutoresizingMaskIntoConstraints="NO" id="4ap-Gi-2AO">

15
OSBindings/Mac/Clock Signal/ScanTarget/CSScanTarget.mm
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@ -112,7 +112,7 @@ using BufferingScanTarget = Outputs::Display::BufferingScanTarget;
//
uniforms()->scale[0] = modals.output_scale.x;
uniforms()->scale[1] = modals.output_scale.y;
uniforms()->lineWidth = 1.0f / modals.expected_vertical_lines;
uniforms()->lineWidth = 0.75f / modals.expected_vertical_lines; // TODO: return to 1.0 (or slightly more), once happy.
const auto toRGB = to_rgb_matrix(modals.composite_colour_space);
uniforms()->toRGB = simd::float3x3(
@ -205,6 +205,11 @@ using BufferingScanTarget = Outputs::Display::BufferingScanTarget;
break;
}
// Enable blending.
pipelineDescriptor.colorAttachments[0].blendingEnabled = YES;
pipelineDescriptor.colorAttachments[0].sourceRGBBlendFactor = MTLBlendFactorSourceAlpha;
pipelineDescriptor.colorAttachments[0].destinationRGBBlendFactor = MTLBlendFactorOneMinusSourceAlpha;
_scanPipeline = [view.device newRenderPipelineStateWithDescriptor:pipelineDescriptor error:nil];
}
@ -219,9 +224,15 @@ using BufferingScanTarget = Outputs::Display::BufferingScanTarget;
[self setModals:*newModals view:view];
}
// Buy into framebuffer preservation.
// TODO: do I really need to do this on every draw?
MTLRenderPassDescriptor *const descriptor = view.currentRenderPassDescriptor;
descriptor.colorAttachments[0].loadAction = MTLLoadActionLoad;
descriptor.colorAttachments[0].storeAction = MTLStoreActionStore;
descriptor.colorAttachments[0].clearColor = MTLClearColorMake(1.0, 1.0, 0.0, 1.0);
// Generate a command encoder for the view.
id <MTLCommandBuffer> commandBuffer = [_commandQueue commandBuffer];
MTLRenderPassDescriptor *const descriptor = view.currentRenderPassDescriptor;
id <MTLRenderCommandEncoder> encoder = [commandBuffer renderCommandEncoderWithDescriptor:descriptor];
// Drawing. Just scans.

3
OSBindings/Mac/Clock Signal/ScanTarget/ScanTarget.metal
View File

@ -171,9 +171,10 @@ float3 convertRed1Green1Blue1(SourceInterpolator vert, texture2d<ushort> texture
return float3(sample&4, sample&2, sample&1);
}
// TODO: don't hard code the 0.64 in sample##name.
#define DeclareShaders(name, pixelType) \
fragment float4 sample##name(SourceInterpolator vert [[stage_in]], texture2d<pixelType> texture [[texture(0)]]) { \
return float4(convert##name(vert, texture), 1.0); \
return float4(convert##name(vert, texture), 0.64); \
} \
\
fragment float4 svideoSample##name(SourceInterpolator vert [[stage_in]], texture2d<pixelType> texture [[texture(0)]], constant Uniforms &uniforms [[buffer(0)]]) { \