Added a triangle

src/Engine/engine/engine.h

@@ -3,7 +3,7 @@
 // Normal header
 
 // Current progress
-// 3 - Graphics Pipeline - Doing PipelineBuilder functions
+// 3 - Graphics Pipeline - Doing mesh buffers
 
 #include "descriptors.h" // Required for public interface custom allocator
 #include "Common/Types.h"
@@ -143,6 +143,9 @@ class Engine {
     void drawBackground(
       VkCommandBuffer cmd
     );
+    void drawGeometry(
+      VkCommandBuffer cmd
+    );
     void drawImgui(
       VkCommandBuffer cmd,
       VkImageView targetImageView
@@ -352,11 +355,21 @@ void Engine::draw() {
 
 	drawBackground(cmd);
 
-	// Transfer the draw image and swapchain image to the correct layouts
+	// Prepare for geometry draw
 	vkutil::transitionImage(
 	  cmd,
 		_drawImage.image,
 	  VK_IMAGE_LAYOUT_GENERAL,
+		VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL
+	);
+
+	drawGeometry(cmd);
+
+	// Transfer the draw image and swapchain image to the correct layouts
+	vkutil::transitionImage(
+  	cmd,
+  	_drawImage.image,
+    VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
     VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL
 	);
 
@@ -1330,6 +1343,51 @@ void Engine::drawBackground(
 
 }
 
+void Engine::drawGeometry(
+  VkCommandBuffer cmd
+) {
+  // Store some info
+  uint32_t width = _drawExtent.width;
+  uint32_t height = _drawExtent.height;
+  // Begin rendering
+  VkRenderingAttachmentInfo colorAttachment = vkinit::attachmentInfo(_drawImage.imageView, nullptr, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL);
+
+  VkRenderingInfo renderInfo = vkinit::renderingInfo(_drawExtent, &colorAttachment, nullptr);
+  vkCmdBeginRendering(cmd, &renderInfo);
+
+  vkCmdBindPipeline(cmd, VK_PIPELINE_BIND_POINT_GRAPHICS, _trianglePipeline);
+
+  // Dynamic viewport and scissor
+  VkViewport viewport = {
+    .x = 0,
+    .y = 0,
+    .width = (float)width,
+    .height = (float)height,
+    .minDepth = 0.f,
+    .maxDepth = 1.f
+  };
+
+  vkCmdSetViewport(cmd, 0, 1, &viewport);
+
+  VkRect2D scissor = {
+    .offset = {
+      .x = 0,
+      .y = 0
+    },
+    .extent = {
+      .width = (uint32_t)width,
+      .height = (uint32_t)height
+    }
+  };
+
+  vkCmdSetScissor(cmd, 0, 1, &scissor);
+
+  //launch a draw command to draw 3 vertices
+  vkCmdDraw(cmd, 3, 1, 0, 0);
+
+  vkCmdEndRendering(cmd);
+}
+
 void Engine::drawImgui(
   VkCommandBuffer cmd,
   VkImageView targetImageView