render a triangle

1 files changed, 41 insertions, 4 deletions

diff --git a/c2.cpp b/c2.cpp
index bb1b2e1..92cff0b 100644
--- a/c2.cpp
+++ b/c2.cpp
@@ -4,10 +4,17 @@ extern "C" {
 #include "plat.h"
 #include "memory.h"
 }
+#include <string.h>
 
 #define video_arena_size (1024 * 1024 * 16)
 #define per_frame_memory_size (1024 * 1024)
 
+static float verts[] = {
+	 0.5f,  0.5f, 1.0f, 0.0f, 0.0f,
+	-0.5f,  0.5f, 0.0f, 1.0f, 0.0f,
+	 0.0f, -0.5f, 0.0f, 0.0f, 1.0f
+};
+
 struct C2 : public App {
 	Device* dev;
 	void on_resize() override {
@@ -18,7 +25,8 @@ struct C2 : public App {
 int main() {
 	Arena video_arena;
 	Device* dev;
-	Shader* shader;
+	Shader_Id shader;
+	Buffer_Id vbo;
 	C2* app = App::create<C2>("c2");
 	void* per_frame;
 	app->running = 1;
@@ -30,12 +38,23 @@ int main() {
 	dev = Device::create(&video_arena, app); 
 	app->dev = dev;
 	shader = dev->load_shader("data/triangle.csh");
-
 	per_frame = heap_alloc(
 		dev->heap,
 		per_frame_memory_size
 	);
+	assert(per_frame != 0);
 	uint8_t r = 0;
+	vbo = dev->create_buffer(
+		sizeof verts,
+		Buffer_Flags::vertex_buffer |
+		Buffer_Flags::cpu_readwrite
+	);
+	{
+		void* mem;
+		mem = dev->map_buffer(vbo, 0, sizeof verts);
+		memcpy(mem, verts, sizeof verts);
+		dev->unmap_buffer(vbo);
+	}
 	while (app->running) {
 		Arena frame_arena;
 		init_arena(&frame_arena, per_frame, per_frame_memory_size);
@@ -48,13 +67,31 @@ int main() {
 		pb.rp_target(dev->get_backbuffer(), { r, 0x00, 0xff, 0xff });
 		Render_Pass& pass = pb.build_rp();
 
-		dev->get_ctx().submit(*dev, pass);
+		pb.begin();
+		pb.shader(shader);
+		pb.vertex_format(dev->get_shader(shader).vf);
+		Pipeline& pip = pb.build();
+
+		Vertex_Buffer_Binding binding[] = {{
+			.id = vbo,
+			.offset = 0,
+			.target = dev->get_shader(shader).binding_index("verts")
+		}, {}};
+
+		Draw draw{};
+		draw.verts = binding;
+		draw.vertex_count = 3;
+		draw.instance_count = 1;
+
+		dev->get_ctx().submit(*dev, draw, pip, pass);
+	/*	dev->get_ctx().submit(*dev, pass);*/
 
 		r += 10;
 		dev->present();
 		app->end();
 	}
-	shader->destroy(dev);
+	dev->destroy_buffer(vbo);
+	dev->destroy_shader(shader);
 	dev->destroy();
 	app->destroy();
 }