Starting render passes.

src/xenia/gpu/vulkan/render_cache.cc

@@ -37,6 +37,37 @@ VkRenderPass RenderCache::BeginRenderPass(VkCommandBuffer command_buffer,
   // Lookup or construct a render pass compatible with our current state.
   VkRenderPass render_pass = nullptr;
 
+  // Begin render pass.
+  VkRenderPassBeginInfo render_pass_begin_info;
+  render_pass_begin_info.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
+  render_pass_begin_info.pNext = nullptr;
+  render_pass_begin_info.renderPass = render_pass;
+
+  // Target framebuffer.
+  // render_pass_begin_info.framebuffer = current_buffer.framebuffer;
+
+  // Render into the entire buffer (or at least tell the API we are doing
+  // this). In theory it'd be better to clip this to the scissor region, but
+  // the docs warn anything but the full framebuffer may be slow.
+  render_pass_begin_info.renderArea.offset.x = 0;
+  render_pass_begin_info.renderArea.offset.y = 0;
+  // render_pass_begin_info.renderArea.extent.width = surface_width_;
+  // render_pass_begin_info.renderArea.extent.height = surface_height_;
+
+  // Configure clear color, if clearing.
+  VkClearValue color_clear_value;
+  color_clear_value.color.float32[0] = 238 / 255.0f;
+  color_clear_value.color.float32[1] = 238 / 255.0f;
+  color_clear_value.color.float32[2] = 238 / 255.0f;
+  color_clear_value.color.float32[3] = 1.0f;
+  VkClearValue clear_values[] = {color_clear_value};
+  render_pass_begin_info.clearValueCount =
+      static_cast<uint32_t>(xe::countof(clear_values));
+  render_pass_begin_info.pClearValues = clear_values;
+
+  vkCmdBeginRenderPass(command_buffer, &render_pass_begin_info,
+                       VK_SUBPASS_CONTENTS_INLINE);
+
   return render_pass;
 }
 
@@ -44,6 +75,9 @@ void RenderCache::EndRenderPass() {
   assert_not_null(current_command_buffer_);
   auto command_buffer = current_command_buffer_;
   current_command_buffer_ = nullptr;
+
+  // End the render pass.
+  vkCmdEndRenderPass(command_buffer);
 }
 
 void RenderCache::ClearCache() {

src/xenia/gpu/vulkan/render_cache.h

@@ -52,6 +52,9 @@ class RenderCache {
  private:
   RegisterFile* register_file_ = nullptr;
   VkDevice device_ = nullptr;
+
+  // Only valid during a BeginRenderPass/EndRenderPass block.
+  VkCommandBuffer current_command_buffer_ = nullptr;
 };
 
 }  // namespace vulkan