* add needed libui functions under Windows, even if they don't do a whole lot

* fix ass-stupid fog bug

src/GPU3D_OpenGL.cpp

@@ -187,7 +187,7 @@ void SetupDefaultTexParams(GLuint tex)
 bool Init()
 {
     GLint uni_id;
-    
+
     glEnable(GL_DEPTH_TEST);
     glEnable(GL_STENCIL_TEST);
 
@@ -1043,9 +1043,6 @@ void RenderFrame()
         {
             if (RenderPolygonRAM[i]->Degenerate) continue;
 
-            // zog.
-            //if (RenderPolygonRAM[i]->YBottom <= 96 || RenderPolygonRAM[i]->YTop >= 144) continue;
-
             SetupPolygon(&PolygonList[npolys], RenderPolygonRAM[i]);
             if (firsttrans < 0 && RenderPolygonRAM[i]->Translucent)
                 firsttrans = npolys;

src/GPU3D_OpenGL_shaders.h

@@ -42,7 +42,7 @@ uniform uint uOpaquePolyID;
 uniform uint uFogFlag;
 
 out vec4 oColor;
-out vec3 oAttr;
+out vec4 oAttr;
 
 void main()
 {
@@ -50,6 +50,7 @@ void main()
     oAttr.r = float(uOpaquePolyID) / 63.0;
     oAttr.g = 0;
     oAttr.b = float(uFogFlag);
+    oAttr.a = 1;
 }
 )";
 
@@ -178,7 +179,7 @@ smooth in vec2 fTexcoord;
 flat in ivec3 fPolygonAttr;
 
 out vec4 oColor;
-out vec3 oAttr;
+out vec4 oAttr;
 
 int TexcoordWrap(int c, int maxc, int mode)
 {
@@ -620,6 +621,7 @@ void main()
     oColor = col;
     oAttr.r = float((fPolygonAttr.x >> 24) & 0x3F) / 63.0;
     oAttr.b = float((fPolygonAttr.x >> 15) & 0x1);
+    oAttr.a = 1;
 }
 )";
 
@@ -635,6 +637,7 @@ void main()
     oColor = col;
     oAttr.r = float((fPolygonAttr.x >> 24) & 0x3F) / 63.0;
     oAttr.b = float((fPolygonAttr.x >> 15) & 0x1);
+    oAttr.a = 1;
     gl_FragDepth = fZ;
 }
 )";
@@ -649,6 +652,7 @@ void main()
 
     oColor = col;
     oAttr.b = 0;
+    oAttr.a = 1;
 }
 )";
 
@@ -664,6 +668,7 @@ void main()
 
     oColor = col;
     oAttr.b = 0;
+    oAttr.a = 1;
     gl_FragDepth = fZ;
 }
 )";

src/libui_sdl/libui/windows/gl.cpp

@@ -135,8 +135,27 @@ void *uiGLGetProcAddress(const char* proc)
     return (void*)wglGetProcAddress(proc);
 }
 
+void uiGLBegin(uiGLContext* ctx)
+{
+}
+
+void uiGLEnd(uiGLContext* ctx)
+{
+}
+
 void uiGLSwapBuffers(uiGLContext* ctx)
 {
     if (ctx == NULL) return;
     SwapBuffers(ctx->dc);
 }
+
+int uiGLGetFramebuffer(uiGLContext* ctx)
+{
+    return 0;
+}
+
+float uiGLGetFramebufferScale(uiGLContext* ctx)
+{
+    // TODO
+    return 1;
+}