implement glad into torque.

Engine/source/gfx/gl/gfxGLDevice.cpp

@@ -134,7 +134,8 @@ void GFXGLDevice::initGLState()
    mCardProfiler = new GFXGLCardProfiler();
    mCardProfiler->init(); 
    glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, (GLint*)&mMaxShaderTextures);
-   glGetIntegerv(GL_MAX_TEXTURE_UNITS, (GLint*)&mMaxFFTextures);
+   // JTH: Needs removed, ffp
+   //glGetIntegerv(GL_MAX_TEXTURE_UNITS, (GLint*)&mMaxFFTextures);
    glGetIntegerv(GL_MAX_COLOR_ATTACHMENTS, (GLint*)&mMaxTRColors);
    mMaxTRColors = getMin( mMaxTRColors, (U32)(GFXTextureTarget::MaxRenderSlotId-1) );
    
@@ -641,7 +642,7 @@ void GFXGLDevice::setLightMaterialInternal(const GFXLightMaterial mat)
 
 void GFXGLDevice::setGlobalAmbientInternal(ColorF color)
 {
-   glLightModelfv(GL_LIGHT_MODEL_AMBIENT, (GLfloat*)&color);
+   // ONLY NEEDED ON FFP
 }
 
 void GFXGLDevice::setTextureInternal(U32 textureUnit, const GFXTextureObject*texture)
@@ -697,12 +698,12 @@ void GFXGLDevice::setClipRect( const RectI &inRect )
    const F32 right = mClip.point.x + mClip.extent.x;
    const F32 bottom = mClip.extent.y;
    const F32 top = 0.0f;
-   const F32 near = 0.0f;
-   const F32 far = 1.0f;
+   const F32 nearPlane = 0.0f;
+   const F32 farPlane = 1.0f;
    
    const F32 tx = -(right + left)/(right - left);
    const F32 ty = -(top + bottom)/(top - bottom);
-   const F32 tz = -(far + near)/(far - near);
+   const F32 tz = -(farPlane + nearPlane)/(farPlane - nearPlane);
    
    static Point4F pt;
    pt.set(2.0f / (right - left), 0.0f, 0.0f, 0.0f);
@@ -711,7 +712,7 @@ void GFXGLDevice::setClipRect( const RectI &inRect )
    pt.set(0.0f, 2.0f/(top - bottom), 0.0f, 0.0f);
    mProjectionMatrix.setColumn(1, pt);
    
-   pt.set(0.0f, 0.0f, -2.0f/(far - near), 0.0f);
+   pt.set(0.0f, 0.0f, -2.0f/(farPlane - nearPlane), 0.0f);
    mProjectionMatrix.setColumn(2, pt);
    
    pt.set(tx, ty, tz, 1.0f);

Engine/source/gfx/gl/tGL/tGL.cpp

@@ -33,11 +33,10 @@ namespace GL
 {
    void gglPerformBinds()
    {
-      // JTH: epoxy has one oddity with windows. You need to bind the context
-      // after creating the context to udpate the internals of epoxy.
-#ifdef TORQUE_OS_WIN
-      epoxy_handle_external_wglMakeCurrent();
-#endif
+      if (!gladLoadGL()) 
+      {
+	     AssertFatal(false, "Unable to load GLAD. Make sure your OpenGL drivers are up to date!");
+      }
    }
 
    void gglPerformExtensionBinds(void *context)

Engine/source/gfx/gl/tGL/tGL.h

@@ -23,11 +23,10 @@
 #ifndef T_GL_H
 #define T_GL_H
 
-#include <epoxy/gl.h>
+#include <glad/glad.h>
 
-// JTH: This is slow, we should probably check extensions once and cache them
-// directly inside of some compatability table.
-#define gglHasExtension(EXTENSION) epoxy_has_gl_extension("GL_" #EXTENSION)
+// JTH: When we use glad, extensions are chached into simple booleans (ints)
+#define gglHasExtension(EXTENSION) GLAD_GL_##EXTENSION
 
 #endif
 

Engine/source/gfx/gl/tGL/tWGL.h

@@ -28,9 +28,9 @@
 #ifdef TORQUE_OPENGL
 
 #include "tGL.h"
-#include <epoxy/wgl.h>
+#include <glad/glad_wgl.h>
 
-#define gglHasWExtension(window, EXTENSION) epoxy_has_wgl_extension(window, "WGL_" # EXTENSION)
+#define gglHasWExtension(window, EXTENSION) GLAD_WGL_##EXTENSION
 
 #endif //TORQUE_OPENGL
 

Engine/source/gfx/gl/tGL/tXGL.h

@@ -28,9 +28,9 @@
 #ifdef TORQUE_OS_LINUX
 
 #include "tGL.h"
-#include <epoxy/glx.h>
+#include <glad/glad_glx.h>
 
-#define gglHasXExtension(display, screen, EXTENSION) epoxy_has_glx_extension(display, screen, "GLX_" # EXTENSION)
+#define gglHasXExtension(display, screen, EXTENSION) 
 
 #endif //TORQUE_OS_LINUX