Fix varaible allocated bindless textures

libraries/gpu-gl/src/gpu/gl45/GL45Backend.h

@@ -74,6 +74,14 @@ public:
             uint32_t minMip{ 0 };
             uint32_t sampler{ 0 };
 
+            bool operator==(const Bindless& other) const {
+                return handle == other.handle && minMip == other.minMip && sampler == other.sampler;
+            }
+
+            bool operator!=(const Bindless& other) const {
+                return !(*this == other);
+            }
+
             operator bool() const {
                 return handle != 0;
             }
@@ -177,7 +185,7 @@ public:
         ~GL45VariableAllocationTexture();
 
         Size size() const override { return _size; }
-        uint16 getMinMip() const override { return _populatedMip; }
+        uint16 getMinMip() const override { return _populatedMip - _allocatedMip; }
         virtual const Bindless& getBindless() const override;
 
         Size copyMipFaceLinesFromTexture(uint16_t mip, uint8_t face, const uvec3& size, uint32_t yOffset, GLenum internalFormat, GLenum format, GLenum type, Size sourceSize, const void* sourcePointer) const override;

libraries/gpu-gl/src/gpu/gl45/GL45BackendTexture.cpp

@@ -249,7 +249,7 @@ void GL45Texture::releaseBindless() const {
     glMakeTextureHandleNonResidentARB(_bindless.handle);
     _bindless = Bindless();
 }
-    
+
 void GL45Texture::recreateBindless() const {
     if (isBindless()) {
         releaseBindless();
@@ -439,6 +439,7 @@ GL45TextureTable* GL45Backend::syncGPUObject(const TextureTablePointer& textureT
     }
 
     object->update(handles);
+
     return object;
 }
 

libraries/gpu-gl/src/gpu/gl45/GL45BackendVariableTexture.cpp

@@ -146,7 +146,8 @@ void GL45ResourceTexture::promote() {
     uint16_t targetAllocatedMip = _allocatedMip - std::min<uint16_t>(_allocatedMip, 2);
     targetAllocatedMip = std::max<uint16_t>(_minAllocatedMip, targetAllocatedMip);
 
-    if (isBindless()) {
+    bool bindless = isBindless();
+    if (bindless) {
         releaseBindless();
     }
 
@@ -163,6 +164,10 @@ void GL45ResourceTexture::promote() {
     // copy pre-existing mips
     copyTextureMipsInGPUMem(oldId, _id, oldAllocatedMip, _allocatedMip, _populatedMip);
 
+    if (bindless) {
+        getBindless();
+    }
+
     // destroy the old texture
     glDeleteTextures(1, &oldId);
 
@@ -183,7 +188,8 @@ void GL45ResourceTexture::demote() {
     auto oldSize = _size;
     auto oldPopulatedMip = _populatedMip;
 
-    if (isBindless()) {
+    bool bindless = isBindless();
+    if (bindless) {
         releaseBindless();
     }
 
@@ -196,6 +202,10 @@ void GL45ResourceTexture::demote() {
     // copy pre-existing mips
     copyTextureMipsInGPUMem(oldId, _id, oldAllocatedMip, _allocatedMip, _populatedMip);
 
+    if (bindless) {
+        getBindless();
+    }
+
     // destroy the old texture
     glDeleteTextures(1, &oldId);