[vulkan] Adjust blend targets from texture types

src/video_core/renderer_vulkan/vk_rasterizer.cpp

@@ -1724,9 +1724,13 @@ void RasterizerVulkan::UpdateBlending(Tegra::Engines::Maxwell3D::Regs& regs) {
 
     if (state_tracker.TouchBlendEnable()) {
         std::array<VkBool32, Maxwell::NumRenderTargets> setup_enables{};
-        std::ranges::transform(
-            regs.blend.enable, setup_enables.begin(),
-            [&](const auto& is_enabled) { return is_enabled != 0 ? VK_TRUE : VK_FALSE; });
+        for (size_t index = 0; index < Maxwell::NumRenderTargets; index++) {
+            const auto format =
+                VideoCore::Surface::PixelFormatFromRenderTargetFormat(regs.rt[index].format);
+            const bool is_integer = IsPixelFormatInteger(format);
+            setup_enables[index] =
+                (!is_integer && regs.blend.enable[index] != 0) ? VK_TRUE : VK_FALSE;
+        }
         scheduler.Record([setup_enables](vk::CommandBuffer cmdbuf) {
             cmdbuf.SetColorBlendEnableEXT(0, setup_enables);
         });