fix missing color attachments in vk render_pass.

impeller/renderer/backend/vulkan/render_pass_vk.cc

@@ -56,6 +56,12 @@ static std::vector<vk::ClearValue> GetVKClearValues(
     const RenderTarget& target) {
   std::vector<vk::ClearValue> clears;
 
+  const ColorAttachment& color0 = target.GetColor0();
+  clears.emplace_back(VKClearValueFromColor(color0.clear_color));
+  if (color0.resolve_texture) {
+    clears.emplace_back(VKClearValueFromColor(color0.clear_color));
+  }
+
   for (const auto& [_, color] : target.GetColorAttachments()) {
     clears.emplace_back(VKClearValueFromColor(color.clear_color));
     if (color.resolve_texture) {
@@ -83,6 +89,22 @@ SharedHandleVK<vk::RenderPass> RenderPassVK::CreateVKRenderPass(
     const std::shared_ptr<CommandBufferVK>& command_buffer) const {
   RenderPassBuilderVK builder;
 
+  const ColorAttachment& color0 = render_target_.GetColor0();
+  builder.SetColorAttachment(
+      0u,                                                   //
+      color0.texture->GetTextureDescriptor().format,        //
+      color0.texture->GetTextureDescriptor().sample_count,  //
+      color0.load_action,                                   //
+      color0.store_action,                                  //
+      TextureVK::Cast(*color0.texture).GetLayout()          //
+  );
+  TextureVK::Cast(*color0.texture)
+      .SetLayoutWithoutEncoding(vk::ImageLayout::eGeneral);
+  if (color0.resolve_texture) {
+    TextureVK::Cast(*color0.resolve_texture)
+        .SetLayoutWithoutEncoding(vk::ImageLayout::eGeneral);
+  }
+
   for (const auto& [bind_point, color] : render_target_.GetColorAttachments()) {
     builder.SetColorAttachment(
         bind_point,                                          //
@@ -137,10 +159,8 @@ RenderPassVK::RenderPassVK(const std::shared_ptr<const Context>& context,
                            const RenderTarget& target,
                            std::shared_ptr<CommandBufferVK> command_buffer)
     : RenderPass(context, target), command_buffer_(std::move(command_buffer)) {
-  color_image_vk_ =
-      render_target_.GetColorAttachments().find(0u)->second.texture;
-  resolve_image_vk_ =
-      render_target_.GetColorAttachments().find(0u)->second.resolve_texture;
+  color_image_vk_ = render_target_.GetColor0().texture;
+  resolve_image_vk_ = render_target_.GetColor0().resolve_texture;
 
   const auto& vk_context = ContextVK::Cast(*context);
   command_buffer_vk_ = command_buffer_->GetCommandBuffer();
@@ -254,6 +274,14 @@ SharedHandleVK<vk::Framebuffer> RenderPassVK::CreateVKFramebuffer(
   // This bit must be consistent to ensure compatibility with the pass created
   // earlier. Follow this order: Color attachments, then depth-stencil, then
   // stencil.
+  const ColorAttachment color0 = render_target_.GetColor0();
+  attachments.emplace_back(
+      TextureVK::Cast(*color0.texture).GetRenderTargetView());
+  if (color0.resolve_texture) {
+    attachments.emplace_back(
+        TextureVK::Cast(*color0.resolve_texture).GetRenderTargetView());
+  }
+
   for (const auto& [_, color] : render_target_.GetColorAttachments()) {
     // The bind point doesn't matter here since that information is present in
     // the render pass.