screen surface is now private member of ScreenHandler instead of global

client/CMT.h

@@ -16,8 +16,6 @@ struct SDL_Surface;
 extern SDL_Texture * screenTexture;
 extern SDL_Renderer * mainRenderer;
 
-extern SDL_Surface *screen;
-
 /// Notify user about encountered fatal error and terminate the game
 /// Defined in clientapp EntryPoint
 /// TODO: decide on better location for this method

client/gui/CGuiHandler.cpp

@@ -20,6 +20,7 @@
 
 #include "../CGameInfo.h"
 #include "../adventureMap/AdventureMapInterface.h"
+#include "../render/Canvas.h"
 #include "../render/Colors.h"
 #include "../render/Graphics.h"
 #include "../render/IFont.h"
@@ -104,21 +105,13 @@ void CGuiHandler::renderFrame()
 		if (settings["video"]["showfps"].Bool())
 			drawFPSCounter();
 
-		SDL_UpdateTexture(screenTexture, nullptr, screen->pixels, screen->pitch);
-	}
-
-	SDL_RenderClear(mainRenderer);
-	SDL_RenderCopy(mainRenderer, screenTexture, nullptr, nullptr);
-
-	{
-		boost::mutex::scoped_lock interfaceLock(GH.interfaceMutex);
-
-		CCS->curh->render();
+		screenHandlerInstance->updateScreenTexture();
 
 		windows().onFrameRendered();
+		CCS->curh->update();
 	}
 
-	SDL_RenderPresent(mainRenderer);
+	screenHandlerInstance->presetScreenTexture();
 	framerate().framerateDelay(); // holds a constant FPS
 }
 
@@ -181,19 +174,12 @@ Point CGuiHandler::screenDimensions() const
 
 void CGuiHandler::drawFPSCounter()
 {
-	int scaling = screenHandlerInstance->getScalingFactor();
-	int x = 7 * scaling;
-	int y = screen->h-20 * scaling;
-	int width3digitFPSIncludingPadding = 48 * scaling;
-	int heightFPSTextIncludingPadding = 11 * scaling;
-	SDL_Rect overlay = { x, y, width3digitFPSIncludingPadding, heightFPSTextIncludingPadding};
-	uint32_t black = SDL_MapRGB(screen->format, 10, 10, 10);
-	SDL_FillRect(screen, &overlay, black);
-
+	Canvas target = GH.screenHandler().getScreenCanvas();
+	Rect targetArea(0, screenDimensions().y - 20, 48, 11);
 	std::string fps = std::to_string(framerate().getFramerate())+" FPS";
 
-	const auto & font = GH.renderHandler().loadFont(FONT_SMALL);
-	font->renderTextLeft(screen, fps, Colors::WHITE, Point(8 * scaling, screen->h-22 * scaling));
+	target.drawColor(targetArea, ColorRGBA(10, 10, 10));
+	target.drawText(targetArea.center(), EFonts::FONT_SMALL, Colors::WHITE, ETextAlignment::CENTER, fps);
 }
 
 bool CGuiHandler::amIGuiThread()

client/gui/CIntObject.cpp

@@ -15,6 +15,7 @@
 #include "EventDispatcher.h"
 #include "Shortcut.h"
 #include "../render/Canvas.h"
+#include "../render/IScreenHandler.h"
 #include "../windows/CMessage.h"
 #include "../CMT.h"
 
@@ -238,7 +239,7 @@ void CIntObject::redraw()
 		}
 		else
 		{
-			Canvas buffer = Canvas::createFromSurface(screen, CanvasScalingPolicy::AUTO);
+			Canvas buffer = GH.screenHandler().getScreenCanvas();
 			showAll(buffer);
 		}
 	}

client/gui/CursorHandler.cpp

@@ -260,6 +260,11 @@ void CursorHandler::updateSpellcastCursor()
 }
 
 void CursorHandler::render()
+{
+	cursor->render();
+}
+
+void CursorHandler::update()
 {
 	if(!showing)
 		return;
@@ -267,7 +272,7 @@ void CursorHandler::render()
 	if (type == Cursor::Type::SPELLBOOK)
 		updateSpellcastCursor();
 
-	cursor->render();
+	cursor->update();
 }
 
 void CursorHandler::hide()

client/gui/CursorHandler.h

@@ -179,6 +179,7 @@ public:
 	Point getPivotOffsetCombat(size_t index);
 
 	void render();
+	void update();
 
 	void hide();
 	void show();

client/gui/WindowHandler.cpp

@@ -17,6 +17,7 @@
 #include "../CMT.h"
 #include "../CGameInfo.h"
 #include "../render/Canvas.h"
+#include "../render/IScreenHandler.h"
 #include "../render/Colors.h"
 #include "../renderSDL/SDL_Extensions.h"
 
@@ -108,7 +109,7 @@ void WindowHandler::totalRedrawImpl()
 {
 	logGlobal->debug("totalRedraw requested!");
 
-	Canvas target = Canvas::createFromSurface(screen, CanvasScalingPolicy::AUTO);
+	Canvas target = GH.screenHandler().getScreenCanvas();
 
 	for(auto & elem : windowsStack)
 		elem->showAll(target);
@@ -126,7 +127,7 @@ void WindowHandler::simpleRedraw()
 
 void WindowHandler::simpleRedrawImpl()
 {
-	Canvas target = Canvas::createFromSurface(screen, CanvasScalingPolicy::AUTO);
+	Canvas target = GH.screenHandler().getScreenCanvas();
 
 	if(!windowsStack.empty())
 		windowsStack.back()->show(target); //blit active interface/window

client/render/ICursor.h

@@ -23,6 +23,7 @@ public:
 	virtual void setImage(std::shared_ptr<IImage> image, const Point & pivotOffset) = 0;
 	virtual void setCursorPosition( const Point & newPos ) = 0;
 	virtual void render() = 0;
+	virtual void update() = 0;
 	virtual void setVisible( bool on) = 0;
 };
 

client/render/IScreenHandler.h

@@ -15,6 +15,8 @@ class Point;
 class Rect;
 VCMI_LIB_NAMESPACE_END
 
+class Canvas;
+
 class IScreenHandler
 {
 public:
@@ -29,6 +31,15 @@ public:
 	/// Fills screen with black color, erasing any existing content
 	virtual void clearScreen() = 0;
 
+	/// Returns canvas that can be used to display objects on screen
+	virtual Canvas getScreenCanvas() const = 0;
+
+	/// Synchronizes internal screen texture. Screen canvas may not be modified during this call
+	virtual void updateScreenTexture() = 0;
+
+	/// Presents screen texture on the screen
+	virtual void presetScreenTexture() = 0;
+
 	/// Returns list of resolutions supported by current screen
 	virtual std::vector<Point> getSupportedResolutions() const = 0;
 

client/renderSDL/CursorHardware.cpp

@@ -92,3 +92,8 @@ void CursorHardware::render()
 {
 	//no-op
 }
+
+void CursorHardware::update()
+{
+	//no-op
+}

client/renderSDL/CursorHardware.h

@@ -30,6 +30,7 @@ public:
 	void setImage(std::shared_ptr<IImage> image, const Point & pivotOffset) override;
 	void setCursorPosition( const Point & newPos ) override;
 	void render() override;
+	void update() override;
 	void setVisible( bool on) override;
 };
 

client/renderSDL/CursorSoftware.cpp

@@ -21,12 +21,15 @@
 #include <SDL_render.h>
 #include <SDL_events.h>
 
-void CursorSoftware::render()
+void CursorSoftware::update()
 {
 	//texture must be updated in the main (renderer) thread, but changes to cursor type may come from other threads
 	if (needUpdate)
 		updateTexture();
+}
 
+void CursorSoftware::render()
+{
 	Point renderPos = pos - pivot;
 
 	SDL_Rect destRect;

client/renderSDL/CursorSoftware.h

@@ -38,6 +38,7 @@ public:
 	void setImage(std::shared_ptr<IImage> image, const Point & pivotOffset) override;
 	void setCursorPosition( const Point & newPos ) override;
 	void render() override;
+	void update() override;
 	void setVisible( bool on) override;
 };
 

client/renderSDL/SDLImageScaler.cpp

@@ -211,7 +211,7 @@ SDLImageScaler::SDLImageScaler(SDL_Surface * surf, const Rect & virtualDimension
 	if (optimizeImage)
 	{
 		SDLImageOptimizer optimizer(surf, virtualDimensions);
-		optimizer.optimizeSurface(screen);
+		optimizer.optimizeSurface(nullptr);
 		intermediate = optimizer.acquireResultSurface();
 		virtualDimensionsInput = optimizer.getResultDimensions();
 	}

client/renderSDL/SDL_Extensions.cpp

@@ -71,24 +71,29 @@ void CSDL_Ext::setAlpha(SDL_Surface * bg, int value)
 
 SDL_Surface * CSDL_Ext::newSurface(const Point & dimensions)
 {
-	return newSurface(dimensions, screen);
+	return newSurface(dimensions, nullptr);
 }
 
 SDL_Surface * CSDL_Ext::newSurface(const Point & dimensions, SDL_Surface * mod) //creates new surface, with flags/format same as in surface given
 {
-	SDL_Surface * ret = SDL_CreateRGBSurface(0,dimensions.x,dimensions.y,mod->format->BitsPerPixel,mod->format->Rmask,mod->format->Gmask,mod->format->Bmask,mod->format->Amask);
+	SDL_Surface * ret = nullptr;
+
+	if (mod != nullptr)
+		ret = SDL_CreateRGBSurface(0,dimensions.x,dimensions.y,mod->format->BitsPerPixel,mod->format->Rmask,mod->format->Gmask,mod->format->Bmask,mod->format->Amask);
+	else
+		ret = SDL_CreateRGBSurfaceWithFormat(0,dimensions.x,dimensions.y,32,SDL_PixelFormatEnum::SDL_PIXELFORMAT_ARGB8888);
 
 	if(ret == nullptr)
 	{
 		const char * error = SDL_GetError();
 
-		std::string messagePattern = "Failed to create SDL Surface of size %d x %d, %d bpp. Reason: %s";
-		std::string message = boost::str(boost::format(messagePattern) % dimensions.x % dimensions.y % mod->format->BitsPerPixel % error);
+		std::string messagePattern = "Failed to create SDL Surface of size %d x %d. Reason: %s";
+		std::string message = boost::str(boost::format(messagePattern) % dimensions.x % dimensions.y % error);
 
 		handleFatalError(message, true);
 	}
 
-	if (mod->format->palette)
+	if (mod && mod->format->palette)
 	{
 		assert(ret->format->palette);
 		assert(ret->format->palette->ncolors >= mod->format->palette->ncolors);

client/renderSDL/ScreenHandler.cpp

@@ -11,11 +11,14 @@
 #include "StdInc.h"
 #include "ScreenHandler.h"
 
+#include "../CGameInfo.h"
+#include "../CMT.h"
 #include "../eventsSDL/NotificationHandler.h"
 #include "../gui/CGuiHandler.h"
+#include "../gui/CursorHandler.h"
 #include "../gui/WindowHandler.h"
+#include "../render/Canvas.h"
 #include "../renderSDL/SDL_Extensions.h"
-#include "CMT.h"
 
 #include "../../lib/CConfigHandler.h"
 #include "../../lib/constants/StringConstants.h"
@@ -34,7 +37,6 @@
 static SDL_Window * mainWindow = nullptr;
 SDL_Renderer * mainRenderer = nullptr;
 SDL_Texture * screenTexture = nullptr;
-SDL_Surface * screen = nullptr; //main screen surface
 
 static const std::string NAME = GameConstants::VCMI_VERSION; //application name
 static constexpr Point heroes3Resolution = Point(800, 600);
@@ -621,6 +623,24 @@ void ScreenHandler::clearScreen()
 	SDL_RenderPresent(mainRenderer);
 }
 
+Canvas ScreenHandler::getScreenCanvas() const
+{
+	return Canvas::createFromSurface(screen, CanvasScalingPolicy::AUTO);
+}
+
+void ScreenHandler::updateScreenTexture()
+{
+	SDL_UpdateTexture(screenTexture, nullptr, screen->pixels, screen->pitch);
+}
+
+void ScreenHandler::presetScreenTexture()
+{
+	SDL_RenderClear(mainRenderer);
+	SDL_RenderCopy(mainRenderer, screenTexture, nullptr, nullptr);
+	CCS->curh->render();
+	SDL_RenderPresent(mainRenderer);
+}
+
 std::vector<Point> ScreenHandler::getSupportedResolutions() const
 {
 	int displayID = getPreferredDisplayIndex();

client/renderSDL/ScreenHandler.h

@@ -10,14 +10,14 @@
 
 #pragma once
 
+#include "../../lib/Point.h"
+#include "../render/IScreenHandler.h"
+
 struct SDL_Texture;
 struct SDL_Window;
 struct SDL_Renderer;
 struct SDL_Surface;
 
-#include "../../lib/Point.h"
-#include "../render/IScreenHandler.h"
-
 enum class EWindowMode
 {
 	// game runs in a window that covers part of the screen
@@ -44,6 +44,8 @@ enum class EUpscalingFilter
 /// This class is responsible for management of game window and its main rendering surface
 class ScreenHandler final : public IScreenHandler
 {
+	SDL_Surface * screen = nullptr; //main screen surface
+
 	EUpscalingFilter upscalingFilter = EUpscalingFilter::AUTO;
 
 	/// Dimensions of target surfaces/textures, this value is what game logic views as screen size
@@ -114,6 +116,10 @@ public:
 
 	int getInterfaceScalingPercentage() const final;
 
+	Canvas getScreenCanvas() const final;
+	void updateScreenTexture() final;
+	void presetScreenTexture() final;
+
 	std::vector<Point> getSupportedResolutions() const final;
 	std::vector<Point> getSupportedResolutions(int displayIndex) const;
 	std::tuple<int, int> getSupportedScalingRange() const final;