From eda93b76f325358562258c60f8162a011ee6d9fb Mon Sep 17 00:00:00 2001
From: Robin Liu <renfeng@google.com>
Date: Thu, 15 Aug 2024 14:58:56 -0400
Subject: [PATCH] Testcase: Alpha blending

---
 benchmarks/graphics_pipeline/GraphicsBenchmarkApp.cpp | 10 +++++-----
 benchmarks/graphics_pipeline/GraphicsBenchmarkApp.h   |  9 ++++++++-
 2 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/benchmarks/graphics_pipeline/GraphicsBenchmarkApp.cpp b/benchmarks/graphics_pipeline/GraphicsBenchmarkApp.cpp
index 0e5b0f965..1c347af6c 100644
--- a/benchmarks/graphics_pipeline/GraphicsBenchmarkApp.cpp
+++ b/benchmarks/graphics_pipeline/GraphicsBenchmarkApp.cpp
@@ -193,10 +193,6 @@ void GraphicsBenchmarkApp::InitKnobs()
     pKnobTextureCount->SetDisplayName("Number of texture to load in the shader");
     pKnobTextureCount->SetFlagDescription("Select the number of texture to load in the shader.");
 
-    GetKnobManager().InitKnob(&pKnobDisablePsOutput, "disable-ps-output", false);
-    pKnobDisablePsOutput->SetDisplayName("Disable PS output");
-    pKnobDisablePsOutput->SetFlagDescription("Disable PS output.");
-
     GetKnobManager().InitKnob(&pKnobViewportHeightScale, "viewport_height_scale", 0, kAvailableViewportScales);
     pKnobViewportHeightScale->SetDisplayName("Scale viewport height");
     pKnobViewportHeightScale->SetFlagDescription("Scale viewport height to 1, 1/2, 1/4");
@@ -204,6 +200,10 @@ void GraphicsBenchmarkApp::InitKnobs()
     GetKnobManager().InitKnob(&pKnobViewportWidthScale, "viewport_width_scale", 0, kAvailableViewportScales);
     pKnobViewportWidthScale->SetDisplayName("Scale viewport width");
     pKnobViewportWidthScale->SetFlagDescription("Scale viewport width to 1, 1/2, 1/4");
+
+    GetKnobManager().InitKnob(&pKnobQuadBlendMode, "quad_blend_mode", 0, kQuadBlendModes);
+    pKnobQuadBlendMode->SetDisplayName("Blend mode for quad");
+    pKnobQuadBlendMode->SetFlagDescription("Bend mode for quad to none, alpha, disable_output");
 }
 
 void GraphicsBenchmarkApp::Config(ppx::ApplicationSettings& settings)
@@ -787,7 +787,7 @@ Result GraphicsBenchmarkApp::CompilePipeline(const QuadPipelineKey& key)
     gpCreateInfo.frontFace                          = grfx::FRONT_FACE_CW;
     gpCreateInfo.depthReadEnable                    = false;
     gpCreateInfo.depthWriteEnable                   = false;
-    gpCreateInfo.blendModes[0]                      = pKnobDisablePsOutput->GetValue() ? grfx::BLEND_MODE_DISABLE_OUTPUT : grfx::BLEND_MODE_NONE;
+    gpCreateInfo.blendModes[0]                      = pKnobQuadBlendMode->GetValue();
     gpCreateInfo.outputState.renderTargetCount      = 1;
     gpCreateInfo.outputState.renderTargetFormats[0] = key.renderFormat;
     gpCreateInfo.outputState.depthStencilFormat     = GetSwapchain()->GetDepthFormat();
diff --git a/benchmarks/graphics_pipeline/GraphicsBenchmarkApp.h b/benchmarks/graphics_pipeline/GraphicsBenchmarkApp.h
index 2d1dc947f..5c8f2f46c 100644
--- a/benchmarks/graphics_pipeline/GraphicsBenchmarkApp.h
+++ b/benchmarks/graphics_pipeline/GraphicsBenchmarkApp.h
@@ -19,6 +19,7 @@
 #include "MultiDimensionalIndexer.h"
 
 #include "ppx/grfx/grfx_config.h"
+#include "ppx/grfx/grfx_enums.h"
 #include "ppx/grfx/grfx_format.h"
 #include "ppx/knob.h"
 #include "ppx/math_config.h"
@@ -231,6 +232,12 @@ static constexpr std::array<DropdownEntry<QuadViewportScale>, 3> kAvailableViewp
     {"1/4", 0.25}, // scale to 1/4
 }};
 
+static constexpr std::array<DropdownEntry<grfx::BlendMode>, 3> kQuadBlendModes = {{
+    {"none", grfx::BLEND_MODE_NONE},
+    {"alpha", grfx::BLEND_MODE_ALPHA},
+    {"disable_output", grfx::BLEND_MODE_DISABLE_OUTPUT},
+}};
+
 class GraphicsBenchmarkApp
     : public ppx::Application
 {
@@ -544,9 +551,9 @@ class GraphicsBenchmarkApp
 
     std::shared_ptr<KnobFlag<int>>                   pKnobAluCount;
     std::shared_ptr<KnobFlag<int>>                   pKnobTextureCount;
-    std::shared_ptr<KnobCheckbox>                    pKnobDisablePsOutput;
     std::shared_ptr<KnobDropdown<QuadViewportScale>> pKnobViewportHeightScale;
     std::shared_ptr<KnobDropdown<QuadViewportScale>> pKnobViewportWidthScale;
+    std::shared_ptr<KnobDropdown<grfx::BlendMode>>   pKnobQuadBlendMode;
 
 private:
     // =====================================================================