From 7fa069aec585316c34ada298ec557c7e800bf8f3 Mon Sep 17 00:00:00 2001
From: Andrei Karas <akaras@inbox.ru>
Date: Mon, 1 Oct 2012 23:32:51 +0300
Subject: Using GL_ARB_sampler_objects.

---
 src/resources/openglimagehelper.cpp | 35 +++++++++++++++++++++++++++--------
 src/resources/openglimagehelper.h   | 13 ++++++-------
 2 files changed, 33 insertions(+), 15 deletions(-)

(limited to 'src/resources')

diff --git a/src/resources/openglimagehelper.cpp b/src/resources/openglimagehelper.cpp
index 8aed5330e..f1847c150 100644
--- a/src/resources/openglimagehelper.cpp
+++ b/src/resources/openglimagehelper.cpp
@@ -28,6 +28,7 @@
 #include "game.h"
 #include "graphicsmanager.h"
 #include "logger.h"
+#include "mgl.h"
 #include "normalopenglgraphics.h"
 #include "safeopenglgraphics.h"
 
@@ -47,6 +48,7 @@ int OpenGLImageHelper::mInternalTextureType = GL_RGBA8;
 int OpenGLImageHelper::mTextureSize = 0;
 bool OpenGLImageHelper::mBlur = true;
 int OpenGLImageHelper::mUseOpenGL = 0;
+bool OpenGLImageHelper::mUseTextureSampler = false;
 
 Image *OpenGLImageHelper::load(SDL_RWops *const rw, Dye const &dye)
 {
@@ -222,15 +224,18 @@ Image *OpenGLImageHelper::glLoad(SDL_Surface *tmpImage)
         SDL_LockSurface(tmpImage);
 
     glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
-    if (mBlur)
+    if (!mUseTextureSampler)
     {
-        glTexParameteri(mTextureType, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-        glTexParameteri(mTextureType, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-    }
-    else
-    {
-        glTexParameteri(mTextureType, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
-        glTexParameteri(mTextureType, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+        if (mBlur)
+        {
+            glTexParameteri(mTextureType, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+            glTexParameteri(mTextureType, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+        }
+        else
+        {
+            glTexParameteri(mTextureType, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+            glTexParameteri(mTextureType, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+        }
     }
 
     glTexImage2D(mTextureType, 0, mInternalTextureType,
@@ -300,4 +305,18 @@ int OpenGLImageHelper::useOpenGL()
 {
     return mUseOpenGL;
 }
+
+void OpenGLImageHelper::initTextureSampler(GLint id)
+{
+    if (mBlur)
+    {
+        mglSamplerParameteri(id, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+        mglSamplerParameteri(id, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    }
+    else
+    {
+        mglSamplerParameteri(id, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+        mglSamplerParameteri(id, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+    }
+}
 #endif
diff --git a/src/resources/openglimagehelper.h b/src/resources/openglimagehelper.h
index 292e18138..e1a6d48cc 100644
--- a/src/resources/openglimagehelper.h
+++ b/src/resources/openglimagehelper.h
@@ -33,14 +33,7 @@
 #include <SDL.h>
 
 #ifdef USE_OPENGL
-
-/* The definition of OpenGL extensions by SDL is giving problems with recent
- * gl.h headers, since they also include these definitions. As we're not using
- * extensions anyway it's safe to just disable the SDL version.
- */
-//#define NO_SDL_GLEXT
 #define GL_GLEXT_PROTOTYPES 1
-
 #include <SDL_opengl.h>
 #endif
 
@@ -112,6 +105,11 @@ class OpenGLImageHelper final : public ImageHelper
         static int getTextureSize()
         { return mTextureSize; }
 
+        static void initTextureSampler(GLint id);
+
+        static void setUseTextureSampler(bool b)
+        { mUseTextureSampler = b; }
+
     protected:
         /**
          * Returns the first power of two equal or bigger than the input.
@@ -123,6 +121,7 @@ class OpenGLImageHelper final : public ImageHelper
         static int mUseOpenGL;
         static int mTextureSize;
         static bool mBlur;
+        static bool mUseTextureSampler;
 };
 
 #endif
-- 
cgit v1.2.3-70-g09d2