core/compositor: Correctly track SHM buffer damage (#9678)

src/protocols/core/Compositor.cpp

@@ -12,6 +12,7 @@
 #include "../DRMSyncobj.hpp"
 #include "../../render/Renderer.hpp"
 #include "config/ConfigValue.hpp"
+#include "render/Texture.hpp"
 #include <cstring>
 
 class CDefaultSurfaceRole : public ISurfaceRole {
@@ -91,10 +92,10 @@ CWLSurfaceResource::CWLSurfaceResource(SP<CWlSurface> resource_) : resource(reso
     });
 
     resource->setCommit([this](CWlSurface* r) {
-        if (pending.texture)
+        if (pending.buffer)
             pending.bufferDamage.intersect(CBox{{}, pending.bufferSize});
 
-        if (!pending.texture)
+        if (!pending.buffer)
             pending.size = {};
         else if (pending.viewport.hasDestination)
             pending.size = pending.viewport.destination;
@@ -399,36 +400,8 @@ CBox CWLSurfaceResource::extends() {
     return full.getExtents();
 }
 
-Vector2D CWLSurfaceResource::sourceSize() {
-    if UNLIKELY (!current.texture)
-        return {};
-
-    if UNLIKELY (current.viewport.hasSource)
-        return current.viewport.source.size();
-
-    Vector2D trc = current.transform % 2 == 1 ? Vector2D{current.bufferSize.y, current.bufferSize.x} : current.bufferSize;
-    return trc / current.scale;
-}
-
-CRegion CWLSurfaceResource::accumulateCurrentBufferDamage() {
-    if UNLIKELY (!current.texture)
-        return {};
-
-    CRegion surfaceDamage = current.damage;
-    if (current.viewport.hasDestination) {
-        Vector2D scale = sourceSize() / current.viewport.destination;
-        surfaceDamage.scale(scale);
-    }
-
-    if (current.viewport.hasSource)
-        surfaceDamage.translate(current.viewport.source.pos());
-
-    Vector2D trc = current.transform % 2 == 1 ? Vector2D{current.bufferSize.y, current.bufferSize.x} : current.bufferSize;
-
-    return surfaceDamage.scale(current.scale).transform(wlTransformToHyprutils(invertTransform(current.transform)), trc.x, trc.y).add(current.bufferDamage);
-}
-
 void CWLSurfaceResource::commitPendingState(SSurfaceState& state) {
+    auto lastTexture = current.texture;
     if (state.newBuffer) {
         state.newBuffer = false;
         current         = state;
@@ -437,20 +410,19 @@ void CWLSurfaceResource::commitPendingState(SSurfaceState& state) {
         state.buffer.reset();
     }
 
-    if (current.texture)
-        current.texture->m_eTransform = wlTransformToHyprutils(current.transform);
-
     if (current.buffer) {
-        const auto DAMAGE = accumulateCurrentBufferDamage();
-        current.buffer->buffer->update(DAMAGE);
+        if (current.buffer->buffer->isSynchronous())
+            current.updateSynchronousTexture(lastTexture);
 
         // if the surface is a cursor, update the shm buffer
         // TODO: don't update the entire texture
-        if (role->role() == SURFACE_ROLE_CURSOR && !DAMAGE.empty())
-            updateCursorShm(DAMAGE);
+        if (role->role() == SURFACE_ROLE_CURSOR)
+            updateCursorShm(current.accumulateBufferDamage());
     }
 
-    // TODO: we should _accumulate_ and not replace above if sync
+    if (current.texture)
+        current.texture->m_eTransform = wlTransformToHyprutils(current.transform);
+
     if (role->role() == SURFACE_ROLE_SUBSURFACE) {
         auto subsurface = ((CSubsurfaceRole*)role.get())->subsurface.lock();
         if (subsurface->sync)
@@ -478,6 +450,9 @@ void CWLSurfaceResource::commitPendingState(SSurfaceState& state) {
 }
 
 void CWLSurfaceResource::updateCursorShm(CRegion damage) {
+    if (damage.empty())
+        return;
+
     auto buf = current.buffer ? current.buffer->buffer : SP<IHLBuffer>{};
 
     if UNLIKELY (!buf)

src/protocols/core/Compositor.hpp

@@ -11,6 +11,7 @@
 #include <vector>
 #include <cstdint>
 #include "../WaylandProtocol.hpp"
+#include "render/Texture.hpp"
 #include "wayland.hpp"
 #include "../../helpers/signal/Signal.hpp"
 #include "../../helpers/math/Math.hpp"
@@ -75,7 +76,6 @@ class CWLSurfaceResource {
     SP<CWlSurface>                getResource();
     CBox                          extends();
     void                          resetRole();
-    Vector2D                      sourceSize();
 
     struct {
         CSignal precommit; // before commit
@@ -102,7 +102,6 @@ class CWLSurfaceResource {
 
     void                                   breadthfirst(std::function<void(SP<CWLSurfaceResource>, const Vector2D&, void*)> fn, void* data);
     SP<CWLSurfaceResource>                 findFirstPreorder(std::function<bool(SP<CWLSurfaceResource>)> fn);
-    CRegion                                accumulateCurrentBufferDamage();
     void                                   presentFeedback(timespec* when, PHLMONITOR pMonitor, bool discarded = false);
     void                                   commitPendingState(SSurfaceState& state);
 

src/protocols/core/Shm.cpp

@@ -22,19 +22,12 @@ CWLSHMBuffer::CWLSHMBuffer(SP<CWLSHMPoolResource> pool_, uint32_t id, int32_t of
     offset = offset_;
     opaque = NFormatUtils::isFormatOpaque(NFormatUtils::shmToDRM(fmt_));
 
-    texture = makeShared<CTexture>(NFormatUtils::shmToDRM(fmt), (uint8_t*)pool->data + offset, stride, size_);
-
     resource = CWLBufferResource::create(makeShared<CWlBuffer>(pool_->resource->client(), 1, id));
 
     listeners.bufferResourceDestroy = events.destroy.registerListener([this](std::any d) {
         listeners.bufferResourceDestroy.reset();
         PROTO::shm->destroyResource(this);
     });
-
-    success = texture->m_iTexID;
-
-    if UNLIKELY (!success)
-        Debug::log(ERR, "Failed creating a shm texture: null texture id");
 }
 
 CWLSHMBuffer::~CWLSHMBuffer() {
@@ -74,11 +67,11 @@ void CWLSHMBuffer::endDataPtr() {
 }
 
 bool CWLSHMBuffer::good() {
-    return success;
+    return true;
 }
 
 void CWLSHMBuffer::update(const CRegion& damage) {
-    texture->update(NFormatUtils::shmToDRM(fmt), (uint8_t*)pool->data + offset, stride, damage);
+    ;
 }
 
 CSHMPool::CSHMPool(CFileDescriptor fd_, size_t size_) : fd(std::move(fd_)), size(size_), data(mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd.get(), 0)) {

src/protocols/core/Shm.hpp

@@ -50,8 +50,6 @@ class CWLSHMBuffer : public IHLBuffer {
     SP<CSHMPool>                                   pool;
 
   private:
-    bool success = false;
-
     struct {
         CHyprSignalListener bufferResourceDestroy;
     } listeners;