From c557763010a8976680f37609ca10e666ff849cd9 Mon Sep 17 00:00:00 2001
From: omniscient <17525998+omnisci3nce@users.noreply.github.com>
Date: Thu, 17 Oct 2024 19:18:38 +1100
Subject: metal triangle!

---
 examples/triangle.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

(limited to 'examples')

diff --git a/examples/triangle.c b/examples/triangle.c
index ccbcea3..c304562 100644
--- a/examples/triangle.c
+++ b/examples/triangle.c
@@ -2,11 +2,57 @@
 
 #include <celeritas.h>
 
+static vec4 vertices[] = {
+  {-0.5f, -0.5f, 0.0f, 1.0},
+  { 0.5f, -0.5f, 0.0f, 1.0},
+  { 0.0f,  0.5f, 0.0f, 1.0}
+};
+
+pipeline_handle draw_pipeline;
+buf_handle tri_vert_buffer;
+
+void draw() {
+  render_pass_desc d = {};
+  gpu_encoder* enc = ral_render_encoder(d);
+  ral_encode_bind_pipeline(enc, draw_pipeline);
+  ral_encode_set_vertex_buf(enc, tri_vert_buffer);
+  ral_encode_draw_tris(enc, 0, 3);
+  ral_encoder_finish_and_submit(enc);
+}
+
 int main() {
   core_bringup("Celeritas Example: Triangle", NULL);
 
+  // create rendering pipeline
+  gfx_pipeline_desc pipeline_desc = {
+    .label = "Triangle drawing pipeline",
+    .vertex_desc = NULL, // TODO
+    .vertex = {
+      .source = NULL,
+      .is_spirv = false,
+      .entry_point = "vertexShader",
+      .shader_stage = VISIBILITY_VERTEX,
+    },
+    .fragment = {
+      .source = NULL,
+      .is_spirv = false,
+      .entry_point = "fragmentShader",
+      .shader_stage = VISIBILITY_FRAGMENT,
+    },
+  };
+
+  draw_pipeline = ral_gfx_pipeline_create(pipeline_desc);
+
+  // create our buffer to hold vertices
+  printf("size of vertices %ld\n", sizeof(vec4) * 3);
+  tri_vert_buffer = ral_buffer_create(sizeof(vec4) * 3, &vertices);
+
   while (!app_should_exit()) {
     glfwPollEvents();
+
+    ral_frame_start();
+    ral_frame_draw(&draw);
+    ral_frame_end();
   }
 
   return 0;
-- 
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