[Fix] (DirectVulkan): rewrite implicit-LOD fragment samples to explicit LOD 0 when every bound sampler is pinned to a single mip level - Adreno 650 (driver 512.502) reads outside a full-screen colour render target's allocation on its implicit-LOD sampling path and faults the GPU, which killed MC 26.2 on its own blit shader (texture(InSampler, texCoord)) between frames 344-421 on every run; this is the same driver defect the default-framebuffer blit shader already works around with textureLod, but an application's shader cannot be edited, so ForceExplicitLod0SamplePass converts OpImageSample*ImplicitLod to the explicit form at the SPIR-V level under a new CompileOptionBit that is only requested when the rewrite provably cannot move a texel (every sampler binding on a single-level view, no anisotropy, and either a LOD clamp that already pins lambda at 0 or min and mag filters that agree - an explicit LOD 0 always takes the magnification side of the min/mag decision); a single-level view now also clamps its sampler to mipmapMode NEAREST with maxLod min(maxLod, 0.25) rather than 0, since collapsing the clamp would make every fragment magnify and quietly retire the min filter; and the program's backend hash memo grows from one slot to four so a program resolved under two compile-flag sets in the same frame stops re-hashing every stage's SPIR-V once per draw

MobileGL/MG_Backend/DirectVulkan/Renderer/ProgramFactory.h

@@ -42,6 +42,11 @@ namespace MobileGL::MG_Backend::DirectVulkan {
             SurfaceRotate90 = 1 << 2,
             SurfaceRotate180 = 1 << 3,
             SurfaceRotate270 = 1 << 4,
+            // Rewrites the fragment stage's implicit-LOD image samples to explicit LOD 0.
+            // Only ever set for a draw whose every sampler binding is clamped to a single mip
+            // level, which makes the two forms produce identical texels (the implicit lambda is
+            // clamped into [minLod, maxLod] = [0, 0] regardless of derivatives or bias).
+            ExplicitLod0Sampling = 1 << 5,
         };
         using CompileOptionFlags = Flags<CompileOptionBit>;
         using HashType = Uint64;