Fixes multisample resolve sRGB cases

CTS expects downsampling in linear space,
where spec says implementation dependent

Components: Vulkan
VK-GL-CTS Issue: 2584

Affects:
dEQP-VK.renderpass.suballocation.multisample_resolve.*_srgb*

Change-Id: I8512ef058b03fe55c5429d3add5d2f4dc890c663

diff --git a/external/vulkancts/modules/vulkan/renderpass/vktRenderPassMultisampleResolveTests.cpp b/external/vulkancts/modules/vulkan/renderpass/vktRenderPassMultisampleResolveTests.cpp
index 504c3be..16532f6 100644 (file)
--- a/external/vulkancts/modules/vulkan/renderpass/vktRenderPassMultisampleResolveTests.cpp
+++ b/external/vulkancts/modules/vulkan/renderpass/vktRenderPassMultisampleResolveTests.cpp
@@ -580,6 +580,7 @@ private:
 
        const Unique<VkCommandPool>                     m_commandPool;
        tcu::TextureLevel                                       m_sum;
+       tcu::TextureLevel                                       m_sumSrgb;
        deUint32                                                        m_sampleMask;
        tcu::ResultCollector                            m_resultCollector;
 };
@@ -606,9 +607,11 @@ MultisampleRenderPassTestInstance::MultisampleRenderPassTestInstance (Context& c
 
        , m_commandPool                         (createCommandPool(context.getDeviceInterface(), context.getDevice(), VK_COMMAND_POOL_CREATE_TRANSIENT_BIT, context.getUniversalQueueFamilyIndex()))
        , m_sum                                         (tcu::TextureFormat(tcu::TextureFormat::RGBA, tcu::TextureFormat::FLOAT), m_width, m_height, m_layerCount)
+       , m_sumSrgb                                     (tcu::TextureFormat(tcu::TextureFormat::RGBA, tcu::TextureFormat::FLOAT), m_width, m_height, m_layerCount)
        , m_sampleMask                          (0x0u)
 {
        tcu::clear(m_sum.getAccess(), Vec4(0.0f, 0.0f, 0.0f, 0.0f));
+       tcu::clear(m_sumSrgb.getAccess(), Vec4(0.0f, 0.0f, 0.0f, 0.0f));
 }
 
 MultisampleRenderPassTestInstance::~MultisampleRenderPassTestInstance (void)
@@ -802,6 +805,9 @@ void MultisampleRenderPassTestInstance::verify (void)
                                {
                                        const Vec4 old = m_sum.getAccess().getPixel(x, y, z);
                                        m_sum.getAccess().setPixel(old + (tcu::isSRGB(format) ? tcu::sRGBToLinear(firstColor) : firstColor), x, y, z);
+
+                                       const Vec4 oldSrgb = m_sumSrgb.getAccess().getPixel(x, y, z);
+                                       m_sumSrgb.getAccess().setPixel(oldSrgb + firstColor, x, y, z);
                                }
                        }
 
@@ -1122,10 +1128,37 @@ tcu::TestStatus MultisampleRenderPassTestInstance::iterate (void)
                                m_sum.getAccess().setPixel(average, x, y, z);
                                errorMask.getAccess().setPixel(okColor, x, y, z);
 
-                               if (diff[0] > threshold.x()
-                                               || diff[1] > threshold.y()
-                                               || diff[2] > threshold.z()
-                                               || diff[3] > threshold.w())
+                               bool failThreshold;
+
+                               if (!tcu::isSRGB(format))
+                               {
+                                       failThreshold = (diff[0] > threshold.x()
+                                                                               || diff[1] > threshold.y()
+                                                                               || diff[2] > threshold.z()
+                                                                               || diff[3] > threshold.w());
+                               }
+                               else
+                               {
+                                       const Vec4      sumSrgb(m_sumSrgb.getAccess().getPixel(x, y, z));
+                                       const Vec4      averageSrgb(sumSrgb / Vec4((float)(0x1u << m_sampleCount)));
+                                       const Vec4      diffSrgb(tcu::abs(averageSrgb - expectedAverage));
+
+                                       m_sumSrgb.getAccess().setPixel(averageSrgb, x, y, z);
+
+                                       // Spec doesn't restrict implementation to downsample in linear color space. So, comparing both non linear and
+                                       // linear diff's in case of srgb formats.
+                                       failThreshold = ((diff[0] > threshold.x()
+                                                                               || diff[1] > threshold.y()
+                                                                               || diff[2] > threshold.z()
+                                                                               || diff[3] > threshold.w()) &&
+                                                                       (diffSrgb[0] > threshold.x()
+                                                                               || diffSrgb[1] > threshold.y()
+                                                                               || diffSrgb[2] > threshold.z()
+                                                                               || diffSrgb[3] > threshold.w()));
+
+                               }
+
+                               if (failThreshold)
                                {
                                        isOk    = false;
                                        maxDiff = tcu::max(maxDiff, diff);