medfall

commit 9aa29a6e5d221d0afd962a7d9a3fdd16b0cea2d8
parent 0422929f211ca7886b1ff12fbb92651ce233642c
Author: Michael Savage <mikejsavage@gmail.com>
Date:   Sat, 13 Oct 2018 00:15:22 +0900

Add a fullscreen pass helper

Diffstat:
renderer.cc
 | 
17
+++++++++++++++++
renderer.h
 | 
2
++

2 files changed, 19 insertions(+), 0 deletions(-)
diff --git a/renderer.cc b/renderer.cc
@@ -77,6 +77,7 @@ static u8 * uniforms_buffer;
 static size_t uniforms_offset;
 
 static Texture blue_noise;
+static Mesh fullscreen_triangle;
 
 static RenderState previous_render_state;
 static FramebufferObject previous_fbo;
@@ -99,11 +100,23 @@ void renderer_init() {
 	ubo_offset_alignment = checked_cast< size_t >( alignment );
 
 	blue_noise = load_png_memory( blue_noise_png, blue_noise_png_len, TEXFMT_R_U8NORM, 1 );
+
+	v3 tri[] = {
+		v3( -1.0f, -1.0f, 0.0f ),
+		v3( 3.0f, -1.0f, 0.0f ),
+		v3( -1.0f, 3.0f, 0.0f ),
+	};
+	MeshConfig config;
+	config.positions = renderer_new_vb( tri, sizeof( tri ) );
+	config.num_vertices = 3;
+	config.primitive_type = PRIMITIVETYPE_TRIANGLES;
+	fullscreen_triangle = renderer_new_mesh( config );
 }
 
 void renderer_term() {
 	glDeleteBuffers( 1, &uniforms );
 	renderer_delete_texture( blue_noise );
+	renderer_delete_mesh( fullscreen_triangle );
 }
 
 void renderer_begin_frame() {
@@ -1047,3 +1060,7 @@ void renderer_draw_instances( const Mesh & mesh, const RenderState & render_stat
 	draw_calls_this_frame++;
 	vertices_this_frame += mesh.num_vertices * num_instances;
 }
+
+void renderer_draw_fullscreen_triangle( const RenderState & render_state ) {
+	renderer_draw_mesh( fullscreen_triangle, render_state );
+}
diff --git a/renderer.h b/renderer.h
@@ -241,6 +241,8 @@ void renderer_draw_mesh( const Mesh & mesh, const RenderState & state );
 void renderer_draw_instances( const Mesh & mesh, const RenderState & state, u32 num_instances, VB instace_data );
 void renderer_delete_mesh( const Mesh & mesh );
 
+void renderer_draw_fullscreen_triangle( const RenderState & state );
+
 /*
  * renderer_new_*( array ) helpers
  */