Backends; Vulkan: do not set VkDescriptorSetLayoutBinding::pImmutableSamplers, allow changing sampler. (#6001, #5502, #914)

Follow up to c9aef16 which removec three funtions worth of duplicate code.

backends/imgui_impl_vulkan.cpp

@@ -30,7 +30,7 @@
 
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
-//  2023-01-02: Vulkan: Removed a bunch of duplicate code.
+//  2023-01-02: Vulkan: Fixed sampler passed to ImGui_ImplVulkan_AddTexture() not being honored + removed a bunch of duplicate code.
 //  2022-10-11: Using 'nullptr' instead of 'NULL' as per our switch to C++11.
 //  2022-10-04: Vulkan: Added experimental ImGui_ImplVulkan_RemoveTexture() for api symetry. (#914, #5738).
 //  2022-01-20: Vulkan: Added support for ImTextureID as VkDescriptorSet. User need to call ImGui_ImplVulkan_AddTexture(). Building for 32-bit targets requires '#define ImTextureID ImU64'. (#914).
@@ -870,12 +870,10 @@ bool ImGui_ImplVulkan_CreateDeviceObjects()
 
     if (!bd->DescriptorSetLayout)
     {
-        VkSampler sampler[1] = {bd->FontSampler};
         VkDescriptorSetLayoutBinding binding[1] = {};
         binding[0].descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
         binding[0].descriptorCount = 1;
         binding[0].stageFlags = VK_SHADER_STAGE_FRAGMENT_BIT;
-        binding[0].pImmutableSamplers = sampler;
         VkDescriptorSetLayoutCreateInfo info = {};
         info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO;
         info.bindingCount = 1;

docs/CHANGELOG.txt

@@ -76,6 +76,8 @@ Other changes:
   with IMGUI_DISABLE_DEBUG_TOOLS is used. (#5901) [@Teselka]
 - Misc: fixed compile-time detection of SSE features on MSVC 32-bits builds. (#5943) [@TheMostDiligent]
 - Backends: Allegro5: restoring using al_draw_indexed_prim() when Allegro version is >= 5.2.5. (#5937) [@Espyo]
+- Backends: Vulkan: Fixed sampler passed to ImGui_ImplVulkan_AddTexture() not being honored as we were using
+  an immutable sampler. (#5502, #6001, #914) [@martin-ejdestig, @rytisss]
 
 
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