From ac104e6f413eab0f192cc8330432e99ee316fcc0 Mon Sep 17 00:00:00 2001
From: bjorn <mail@bjornbyt.es>
Date: Sun, 31 Jul 2022 13:26:35 -0700
Subject: [PATCH] WIP stereo blit shader;

---
 etc/shaders.h                   | 1 +
 src/modules/graphics/graphics.c | 7 ++++++-
 src/modules/graphics/graphics.h | 1 +
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/etc/shaders.h b/etc/shaders.h
index f0b54eb3..a91b5ba9 100644
--- a/etc/shaders.h
+++ b/etc/shaders.h
@@ -5,6 +5,7 @@
 #include "shaders/cubemap.vert.h"
 #include "shaders/cubemap.frag.h"
 #include "shaders/equirect.frag.h"
+#include "shaders/stereoblit.frag.h"
 #include "shaders/animator.comp.h"
 #include "shaders/timewizard.comp.h"
 
diff --git a/src/modules/graphics/graphics.c b/src/modules/graphics/graphics.c
index c3927f59..3cbd2e62 100644
--- a/src/modules/graphics/graphics.c
+++ b/src/modules/graphics/graphics.c
@@ -1499,6 +1499,11 @@ Shader* lovrGraphicsGetDefaultShader(DefaultShader type) {
       info.source[1] = (ShaderSource) { lovr_shader_font_frag, sizeof(lovr_shader_font_frag) };
       info.label = "font";
       break;
+    case SHADER_STEREOBLIT:
+      info.source[0] = (ShaderSource) { lovr_shader_fill_vert, sizeof(lovr_shader_fill_vert) };
+      info.source[1] = (ShaderSource) { lovr_shader_stereoblit_frag, sizeof(lovr_shader_stereoblit_frag) };
+      info.label = "stereoblit";
+      break;
     default: lovrUnreachable();
   }
 
@@ -4733,7 +4738,7 @@ void lovrPassSkybox(Pass* pass, Texture* texture) {
 void lovrPassFill(Pass* pass, Texture* texture) {
   lovrPassDraw(pass, &(Draw) {
     .mode = MESH_TRIANGLES,
-    .shader = SHADER_FILL,
+    .shader = texture->info.layers == 2 ? SHADER_STEREOBLIT : SHADER_FILL,
     .material = texture ? lovrTextureGetMaterial(texture) : NULL,
     .vertex.format = VERTEX_EMPTY,
     .count = 3
diff --git a/src/modules/graphics/graphics.h b/src/modules/graphics/graphics.h
index 81766329..9808024f 100644
--- a/src/modules/graphics/graphics.h
+++ b/src/modules/graphics/graphics.h
@@ -266,6 +266,7 @@ typedef enum {
   SHADER_PANO,
   SHADER_FILL,
   SHADER_FONT,
+  SHADER_STEREOBLIT,
   DEFAULT_SHADER_COUNT
 } DefaultShader;