Fix a couple validation issues.

vulkan/vulkan_context.cpp

@@ -230,6 +230,15 @@ vk::CommandBuffer Context::begin_cmd_buffer()
     return one_time_use_cmd;
 }
 
+void Context::hard_barrier(vk::CommandBuffer cmd)
+{
+    vk::MemoryBarrier barrier(vk::AccessFlagBits::eMemoryRead | vk::AccessFlagBits::eMemoryWrite,
+                              vk::AccessFlagBits::eMemoryRead | vk::AccessFlagBits::eMemoryWrite);
+    cmd.pipelineBarrier(vk::PipelineStageFlagBits::eAllCommands,
+                        vk::PipelineStageFlagBits::eAllCommands,
+                        {}, barrier, {}, {});
+}
+
 void Context::end_cmd_buffer()
 {
     one_time_use_cmd.end();

vulkan/vulkan_context.hpp

@@ -32,6 +32,7 @@ class Context
     void wait_idle();
     vk::CommandBuffer begin_cmd_buffer();
     void end_cmd_buffer();
+    void hard_barrier(vk::CommandBuffer cmd);
 
     vma::Allocator allocator;
     vk::Device device;

vulkan/vulkan_shader_chain.cpp

@@ -279,6 +279,8 @@ bool ShaderChain::load_shader_preset(std::string filename)
     current_frame_index = 0;
     last_frame_index = 2;
 
+    context->wait_idle();
+
     return true;
 }
 
@@ -393,6 +395,8 @@ void ShaderChain::do_frame(uint8_t *data, int width, int height, int stride, vk:
     if (!context->swapchain->begin_frame())
          return;
 
+    current_frame_index = context->swapchain->get_current_frame();
+
     auto cmd = context->swapchain->get_cmd();
 
     update_and_propagate_sizes(width, height, viewport_width, viewport_height);
@@ -509,7 +513,6 @@ void ShaderChain::do_frame(uint8_t *data, int width, int height, int stride, vk:
     context->swapchain->end_frame();
 
     last_frame_index = current_frame_index;
-    current_frame_index = (current_frame_index + 1) % queue_size;
     frame_count++;
 }
 
@@ -523,7 +526,7 @@ void ShaderChain::upload_original(vk::CommandBuffer cmd, uint8_t *data, int widt
                         format,
                         wrap_mode_from_string(pipelines[0]->shader->wrap_mode),
                         pipelines[0]->shader->filter_linear,
-                        true);
+                        pipelines[0]->shader->mipmap_input);
     };
 
     if (original.size() > original_history_size)

vulkan/vulkan_texture.cpp

@@ -108,11 +108,11 @@ void Texture::from_buffer(vk::CommandBuffer cmd,
         .setImage(image)
         .setOldLayout(vk::ImageLayout::eUndefined)
         .setNewLayout(vk::ImageLayout::eTransferDstOptimal)
-        .setSrcAccessMask(vk::AccessFlagBits::eNone)
+        .setSrcAccessMask(vk::AccessFlagBits::eShaderRead)
         .setDstAccessMask(vk::AccessFlagBits::eTransferWrite)
         .setSubresourceRange(srr(0));
 
-    cmd.pipelineBarrier(vk::PipelineStageFlagBits::eTopOfPipe,
+    cmd.pipelineBarrier(vk::PipelineStageFlagBits::eFragmentShader,
                         vk::PipelineStageFlagBits::eTransfer,
                         {}, {}, {}, barrier);