From 3c6437fb20845eb5f64f8f647e8ef3b343b45ec6 Mon Sep 17 00:00:00 2001
From: bjorn <tie.372@gmail.com>
Date: Wed, 22 Nov 2017 20:26:01 -0800
Subject: [PATCH] lovr.graphics.isGammaCorrect; conf.lua t.gammacorrect;

---
 src/api/graphics.c      | 17 +++++++++++++++--
 src/data/boot.lua       |  1 +
 src/graphics/graphics.c | 13 +++++++++++++
 src/graphics/graphics.h |  3 +++
 4 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/src/api/graphics.c b/src/api/graphics.c
index 6697edca..b67e8a85 100644
--- a/src/api/graphics.c
+++ b/src/api/graphics.c
@@ -172,10 +172,16 @@ int l_lovrGraphicsInit(lua_State* L) {
 
   lovrGraphicsInit();
 
-  // Create window
   luax_pushconf(L);
-  lua_getfield(L, -1, "window");
 
+  // Set gamma correct
+  lua_getfield(L, -1, "gammacorrect");
+  bool gammaCorrect = lua_toboolean(L, -1);
+  lovrGraphicsSetGammaCorrect(gammaCorrect);
+  lua_pop(L, 1);
+
+  // Create window if needed
+  lua_getfield(L, -1, "window");
   if (!lua_isnil(L, -1)) {
     lua_getfield(L, -1, "width");
     int width = luaL_checkinteger(L, -1);
@@ -360,6 +366,12 @@ int l_lovrGraphicsSetFont(lua_State* L) {
   return 0;
 }
 
+int l_lovrGraphicsIsGammaCorrect(lua_State* L) {
+  bool gammaCorrect = lovrGraphicsIsGammaCorrect();
+  lua_pushboolean(L, gammaCorrect);
+  return 1;
+}
+
 int l_lovrGraphicsGetSystemLimits(lua_State* L) {
   GraphicsLimits limits = lovrGraphicsGetLimits();
   lua_newtable(L);
@@ -855,6 +867,7 @@ const luaL_Reg lovrGraphics[] = {
   { "setDepthTest", l_lovrGraphicsSetDepthTest },
   { "getFont", l_lovrGraphicsGetFont },
   { "setFont", l_lovrGraphicsSetFont },
+  { "isGammaCorrect", l_lovrGraphicsIsGammaCorrect },
   { "getSystemLimits", l_lovrGraphicsGetSystemLimits },
   { "getLineWidth", l_lovrGraphicsGetLineWidth },
   { "setLineWidth", l_lovrGraphicsSetLineWidth },
diff --git a/src/data/boot.lua b/src/data/boot.lua
index 8a3c17ce..111c5960 100644
--- a/src/data/boot.lua
+++ b/src/data/boot.lua
@@ -8,6 +8,7 @@ local conf = {
     physics = true,
     timer = true
   },
+  gammacorrect = false,
   headset = {
     mirror = true,
     offset = 1.7
diff --git a/src/graphics/graphics.c b/src/graphics/graphics.c
index 33353486..7bc3b6ae 100644
--- a/src/graphics/graphics.c
+++ b/src/graphics/graphics.c
@@ -196,6 +196,11 @@ void lovrGraphicsCreateWindow(int w, int h, bool fullscreen, int msaa, const cha
   glEnable(GL_LINE_SMOOTH);
   glEnable(GL_PROGRAM_POINT_SIZE);
 #endif
+  if (state.gammaCorrect) {
+    glEnable(GL_FRAMEBUFFER_SRGB);
+  } else {
+    glDisable(GL_FRAMEBUFFER_SRGB);
+  }
   glEnable(GL_BLEND);
   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
@@ -358,6 +363,14 @@ void lovrGraphicsSetFont(Font* font) {
   }
 }
 
+bool lovrGraphicsIsGammaCorrect() {
+  return state.gammaCorrect;
+}
+
+void lovrGraphicsSetGammaCorrect(bool gammaCorrect) {
+  state.gammaCorrect = gammaCorrect;
+}
+
 GraphicsLimits lovrGraphicsGetLimits() {
   if (!state.limits.initialized) {
 #ifdef EMSCRIPTEN
diff --git a/src/graphics/graphics.h b/src/graphics/graphics.h
index 9ad14d56..15b0f892 100644
--- a/src/graphics/graphics.h
+++ b/src/graphics/graphics.h
@@ -92,6 +92,7 @@ typedef struct {
   TextureFilter defaultFilter;
   CompareMode depthTest;
   Font* font;
+  bool gammaCorrect;
   GraphicsLimits limits;
   float lineWidth;
   Material* material;
@@ -139,6 +140,8 @@ CompareMode lovrGraphicsGetDepthTest();
 void lovrGraphicsSetDepthTest(CompareMode depthTest);
 Font* lovrGraphicsGetFont();
 void lovrGraphicsSetFont(Font* font);
+bool lovrGraphicsIsGammaCorrect();
+void lovrGraphicsSetGammaCorrect(bool gammaCorrect);
 GraphicsLimits lovrGraphicsGetLimits();
 float lovrGraphicsGetLineWidth();
 void lovrGraphicsSetLineWidth(float width);