From eb45b6f04f5979a286dee0e8bc4dc5fb8ad31c0d Mon Sep 17 00:00:00 2001
From: bjorn <tie.372@gmail.com>
Date: Sun, 22 Jul 2018 19:46:45 -0700
Subject: [PATCH] Add the ability to set Texture LOD bias;

---
 src/api/types/texture.c | 11 +++++++----
 src/graphics/opengl.c   |  1 +
 src/graphics/texture.h  |  1 +
 3 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/src/api/types/texture.c b/src/api/types/texture.c
index fb382cb5..eeec136a 100644
--- a/src/api/types/texture.c
+++ b/src/api/types/texture.c
@@ -28,11 +28,12 @@ int l_lovrTextureGetFilter(lua_State* L) {
   Texture* texture = luax_checktypeof(L, 1, Texture);
   TextureFilter filter = lovrTextureGetFilter(texture);
   lua_pushstring(L, FilterModes[filter.mode]);
+  lua_pushnumber(L, filter.sharpness);
   if (filter.mode == FILTER_ANISOTROPIC) {
     lua_pushnumber(L, filter.anisotropy);
-    return 2;
+    return 3;
   }
-  return 1;
+  return 2;
 }
 
 int l_lovrTextureGetHeight(lua_State* L) {
@@ -85,8 +86,10 @@ int l_lovrTextureReplacePixels(lua_State* L) {
 int l_lovrTextureSetFilter(lua_State* L) {
   Texture* texture = luax_checktypeof(L, 1, Texture);
   FilterMode mode = luaL_checkoption(L, 2, NULL, FilterModes);
-  float anisotropy = luaL_optnumber(L, 3, 1.);
-  lovrTextureSetFilter(texture, (TextureFilter) { .mode = mode, .anisotropy = anisotropy });
+  float sharpness = luaL_optnumber(L, 3, 0.);
+  float anisotropy = luaL_optnumber(L, 4, 1.);
+  TextureFilter filter = { .mode = mode, .sharpness = sharpness, .anisotropy = anisotropy };
+  lovrTextureSetFilter(texture, filter);
   return 0;
 }
 
diff --git a/src/graphics/opengl.c b/src/graphics/opengl.c
index f72d258e..614624e2 100644
--- a/src/graphics/opengl.c
+++ b/src/graphics/opengl.c
@@ -1025,6 +1025,7 @@ void lovrTextureSetFilter(Texture* texture, TextureFilter filter) {
       break;
   }
 
+  glTexParameteri(texture->glType, GL_TEXTURE_LOD_BIAS, -filter.sharpness);
   glTexParameteri(texture->glType, GL_TEXTURE_MAX_ANISOTROPY_EXT, anisotropy);
 }
 
diff --git a/src/graphics/texture.h b/src/graphics/texture.h
index 6ebb892b..a551ee6e 100644
--- a/src/graphics/texture.h
+++ b/src/graphics/texture.h
@@ -20,6 +20,7 @@ typedef enum {
 typedef struct {
   FilterMode mode;
   float anisotropy;
+  float sharpness;
 } TextureFilter;
 
 typedef enum {