Scorescreen no longer crashes but page flips all over the place. Disable color clear each frame.

code/REDALERT/SCORE.CPP

@@ -413,6 +413,7 @@ void ScoreClass::Presentation(void)
 #endif
 	BlackPalette.Set();
 
+	Show_OldFrameBuffer(false);
 
 	void const * country4 = MFCD::Retrieve("COUNTRY4.AUD");
 	void const * sfx4 = MFCD::Retrieve("SFX4.AUD");
@@ -866,6 +867,8 @@ Keyboard->Clear();
 #endif	//FIXIT
 
 #endif
+
+	Show_OldFrameBuffer(true);
 }
 
 

code/REDALERT/WIN32LIB/GBUFFER.H

@@ -1294,5 +1294,6 @@ inline long BufferClass::To_Page(int x, int y, int w, int h, GraphicViewPortClas
 	return ( return_code );
 }
 
+void Show_OldFrameBuffer(bool show);
 
 #endif

code/REDALERT/WINSTUB.CPP

@@ -80,6 +80,14 @@ void (*Misc_Focus_Restore_Function)(void) = nullptr;
 
 void (*Imgui_Dialog_Function)(void) = nullptr;
 
+bool show_oldframebuffer = true;
+void Show_OldFrameBuffer(bool show) {
+	show_oldframebuffer = show;
+	glClearColor(0, 0, 0, 1);
+	glClear(GL_COLOR_BUFFER_BIT);
+	memset(backbuffer_data, 0, ScreenWidth * ScreenHeight * 4);
+}
+
 std::vector<Image_t *> loaded_images;
 
 Image_t* Image_LoadImage(const char* name) {
@@ -166,8 +174,8 @@ void Set_DD_Palette(void* palette, bool raShift)
 
 void ImGui_NewFrame(void) {
 	ImGuiIO& io = ImGui::GetIO();
-	glClearColor(0, 0, 0, 1);
-	glClear(GL_COLOR_BUFFER_BIT);
+	//glClearColor(0, 0, 0, 1);
+	//glClear(GL_COLOR_BUFFER_BIT);
 
 	io.DisplaySize = ImVec2(ScreenWidth, ScreenHeight);
 	ImGui_ImplOpenGL3_NewFrame();
@@ -176,27 +184,26 @@ void ImGui_NewFrame(void) {
 	ImGui_ImplSDL2_NewFrame(game_window);
 }
 
-void Device_Present(void) {
-
-
-	// Rasterize the palette.
-	for (int i = 0; i < ScreenWidth * ScreenHeight; i++) {
-		backbuffer_data[(i * 4) + 0] = backbuffer_palette[(backbuffer_data_raw[i] * 3) + 0];
-		backbuffer_data[(i * 4) + 1] = backbuffer_palette[(backbuffer_data_raw[i] * 3) + 1];
-		backbuffer_data[(i * 4) + 2] = backbuffer_palette[(backbuffer_data_raw[i] * 3) + 2];
-		backbuffer_data[(i * 4) + 3] = 255;
-	}
-	glBindTexture(GL_TEXTURE_2D, backbuffer_texture);
-	glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, ScreenWidth, ScreenHeight, GL_RGBA, GL_UNSIGNED_BYTE, backbuffer_data);
-
+void Device_Present(void) {	
 	// Use imgui to render the screenbuffer.
-	{
+	if(show_oldframebuffer)
+	{		
+		// Rasterize the palette.
+		for (int i = 0; i < ScreenWidth * ScreenHeight; i++) {
+			backbuffer_data[(i * 4) + 0] = backbuffer_palette[(backbuffer_data_raw[i] * 3) + 0];
+			backbuffer_data[(i * 4) + 1] = backbuffer_palette[(backbuffer_data_raw[i] * 3) + 1];
+			backbuffer_data[(i * 4) + 2] = backbuffer_palette[(backbuffer_data_raw[i] * 3) + 2];
+			backbuffer_data[(i * 4) + 3] = 255;
+		}
+		glBindTexture(GL_TEXTURE_2D, backbuffer_texture);
+		glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, ScreenWidth, ScreenHeight, GL_RGBA, GL_UNSIGNED_BYTE, backbuffer_data);
+
 		bool ScreenActive;
 		ImGuiStyle& style = ImGui::GetStyle();
 		style.FramePadding = ImVec2(0, 0);
 		ImGui::SetNextWindowSize(ImVec2(ScreenWidth, ScreenHeight));
 		ImGui::SetNextWindowPos(ImVec2(0, 0));		
-		ImGui::Begin("RenderWindow", &ScreenActive, ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoBackground | ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoScrollbar);
+		ImGui::Begin("RenderWindow", &ScreenActive, ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoBackground | ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoScrollbar | ImGuiWindowFlags_NoMouseInputs);
 			ImVec2 desktopSize(ScreenWidth, ScreenHeight);
 			ImGui::Image((ImTextureID)backbuffer_texture, desktopSize);			
 		ImGui::End();