OpenGL Renderer: Fix a few bugs here and there.

- Fix a compiling bug for ES due to missing tokens.
- Fix Fog and Edge Mark feature availability when running legacy OpenGL. (Regressions from commit 0c7cb99 and commit 8b5ac56.)
- glDrawBuffer() now determines its own algorithm at runtime instead of at compile time. This change is being done to be consistent with all of the other Standard vs ES changes.

desmume/src/OGLRender.cpp

@@ -2298,16 +2298,18 @@ OpenGLRenderer_1_2::OpenGLRenderer_1_2()
 	_geometryAttachmentPolyID        = GeometryAttachmentPolyIDStandard;
 	_geometryAttachmentFogAttributes = GeometryAttachmentFogAttributesStandard;
 	
-#if MSB_FIRST
+#if defined(GL_VERSION_1_2)
+	#if MSB_FIRST
 	ref->textureSrcTypeCIColor   = GL_UNSIGNED_SHORT_1_5_5_5_REV;
 	ref->textureSrcTypeCIFog     = GL_UNSIGNED_INT_8_8_8_8_REV;
 	ref->textureSrcTypeEdgeColor = GL_UNSIGNED_INT_8_8_8_8;
 	ref->textureSrcTypeToonTable = GL_UNSIGNED_SHORT_1_5_5_5_REV;
-#else
+	#else
 	ref->textureSrcTypeCIColor   = GL_UNSIGNED_SHORT_1_5_5_5_REV;
 	ref->textureSrcTypeCIFog     = GL_UNSIGNED_INT_8_8_8_8_REV;
 	ref->textureSrcTypeEdgeColor = GL_UNSIGNED_INT_8_8_8_8_REV;
 	ref->textureSrcTypeToonTable = GL_UNSIGNED_SHORT_1_5_5_5_REV;
+	#endif
 #endif
 }
 
@@ -2606,7 +2608,7 @@ Render3DError OpenGLRenderer_1_2::InitExtensions()
 	// Set rendering support flags based on driver features.
 	this->willFlipAndConvertFramebufferOnGPU = this->isShaderSupported && this->isVBOSupported;
 	this->_deviceInfo.isEdgeMarkSupported = this->isShaderSupported && this->isVBOSupported && this->isFBOSupported;
-	this->_deviceInfo.isFogSupported = this->isShaderSupported && this->isVBOSupported;
+	this->_deviceInfo.isFogSupported = this->isShaderSupported && this->isVBOSupported && this->isFBOSupported;
 	this->_deviceInfo.isTextureSmoothingSupported = this->isShaderSupported;
 	
 	this->_isDepthLEqualPolygonFacingSupported = this->isShaderSupported && this->isVBOSupported && this->isFBOSupported;
@@ -3174,8 +3176,8 @@ Render3DError OpenGLRenderer_1_2::CreateGeometryPrograms()
 		shaderFlags << "#define ENABLE_ALPHA_TEST " << ((programFlags.EnableAlphaTest) ? "true\n" : "false\n");
 		shaderFlags << "#define ENABLE_TEXTURE_SAMPLING " << ((programFlags.EnableTextureSampling) ? "true\n" : "false\n");
 		shaderFlags << "#define TOON_SHADING_MODE " << ((programFlags.ToonShadingMode) ? 1 : 0) << "\n";
-		shaderFlags << "#define ENABLE_FOG " << ((programFlags.EnableFog && this->_deviceInfo.isFogSupported) ? 1 : 0) << "\n";
+		shaderFlags << "#define ENABLE_FOG " << ((programFlags.EnableFog && this->isVBOSupported && this->isFBOSupported) ? 1 : 0) << "\n"; // Do not rely on this->_deviceInfo.isFogSupported because it hasn't been set yet.
-		shaderFlags << "#define ENABLE_EDGE_MARK " << ((programFlags.EnableEdgeMark && this->_deviceInfo.isEdgeMarkSupported) ? 1 : 0) << "\n";
+		shaderFlags << "#define ENABLE_EDGE_MARK " << ((programFlags.EnableEdgeMark && this->isVBOSupported && this->isFBOSupported) ? 1 : 0) << "\n"; // Do not rely on this->_deviceInfo.isEdgeMarkSupported because it hasn't been set yet.
 		shaderFlags << "#define DRAW_MODE_OPAQUE " << ((programFlags.OpaqueDrawMode && this->isVBOSupported && this->isFBOSupported) ? 1 : 0) << "\n";
 		shaderFlags << "\n";
 		shaderFlags << "#define ATTACHMENT_WORKING_BUFFER " << this->_geometryAttachmentWorkingBuffer[programFlags.DrawBuffersMode] << "\n";

desmume/src/OGLRender.h

@@ -332,42 +332,7 @@ EXTERNOGLEXT(PFNGLDELETERENDERBUFFERSEXTPROC, glDeleteRenderbuffersEXT)
 	// modification. In other words, these are one-to-one drop-in replacements.
 	typedef GLclampf GLclampd;
 	#define glClearDepth(depth) glClearDepthf(depth)
-	
-	#ifdef OPENGL_VARIANT_ES
-	#define glDrawBuffer glDrawBufferES
-	static inline void glDrawBufferES(GLenum theAttachment)
-	{
-		GLenum bufs[4] = { GL_NONE, GL_NONE, GL_NONE, GL_NONE };
-		switch (theAttachment)
-		{
-			case GL_NONE:
-				glDrawBuffers(1, bufs);
-				return;
 
-			case GL_COLOR_ATTACHMENT0:
-			case GL_COLOR_ATTACHMENT1:
-			case GL_COLOR_ATTACHMENT2:
-			case GL_COLOR_ATTACHMENT3:
-			{
-				const GLsizei i = theAttachment - GL_COLOR_ATTACHMENT0;
-				bufs[i] = theAttachment;
-				glDrawBuffers(i+1, bufs);
-				return;
-			}
-
-			default:
-				return;
-		}
-	}
-	#else
-	#define glDrawBuffer glDrawBufferDESMUME
-	static inline void glDrawBufferDESMUME(GLenum theAttachment)
-	{
-		GLenum bufs[] = { theAttachment };
-		glDrawBuffers(1, bufs);
-	}
-	#endif
-	
 	// 1D textures may not exist for a particular OpenGL variant, so they will be promoted to
 	// 2D textures instead. Implementations need to modify their GLSL shaders accordingly to
 	// treat any 1D textures as 2D textures instead.
@@ -824,6 +789,41 @@ extern void (*OGLCreateRenderer_ES_3_0_Func)(OpenGLRenderer **rendererPtr);
 
 bool IsOpenGLDriverVersionSupported(unsigned int checkVersionMajor, unsigned int checkVersionMinor, unsigned int checkVersionRevision);
 
+#define glDrawBuffer(theAttachment) glDrawBufferDESMUME((theAttachment), this->_variantID)
+static inline void glDrawBufferDESMUME(GLenum theAttachment, const OpenGLVariantID variantID)
+{
+	GLenum bufs[4] = { GL_NONE, GL_NONE, GL_NONE, GL_NONE };
+
+	if (variantID & OpenGLVariantFamily_ES)
+	{
+		switch (theAttachment)
+		{
+			case GL_NONE:
+				glDrawBuffers(1, bufs);
+				return;
+
+			case GL_COLOR_ATTACHMENT0:
+			case GL_COLOR_ATTACHMENT1:
+			case GL_COLOR_ATTACHMENT2:
+			case GL_COLOR_ATTACHMENT3:
+			{
+				const GLsizei i = theAttachment - GL_COLOR_ATTACHMENT0;
+				bufs[i] = theAttachment;
+				glDrawBuffers(i+1, bufs);
+				return;
+			}
+
+			default:
+				return;
+		}
+	}
+	else
+	{
+		bufs[0] = theAttachment;
+		glDrawBuffers(1, bufs);
+	}
+}
+
 class OpenGLTexture : public Render3DTexture
 {
 protected: