264 lines
7 KiB
C++
264 lines
7 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef BACKENDS_GRAPHICS_SDL_SDLGRAPHICS_H
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#define BACKENDS_GRAPHICS_SDL_SDLGRAPHICS_H
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#include "backends/graphics/windowed.h"
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#include "backends/platform/sdl/sdl-window.h"
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#include "common/events.h"
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#include "common/rect.h"
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class SdlEventSource;
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#ifndef __SYMBIAN32__
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#define USE_OSD 1
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#endif
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/**
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* Base class for a SDL based graphics manager.
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*/
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class SdlGraphicsManager : virtual public WindowedGraphicsManager, public Common::EventObserver {
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public:
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SdlGraphicsManager(SdlEventSource *source, SdlWindow *window);
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virtual ~SdlGraphicsManager() {}
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/**
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* Makes this graphics manager active. That means it should be ready to
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* process inputs now. However, even without being active it should be
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* able to query the supported modes and other bits.
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*/
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virtual void activateManager();
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/**
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* Makes this graphics manager inactive. This should allow another
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* graphics manager to become active again.
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*/
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virtual void deactivateManager();
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/**
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* Notify the graphics manager that the graphics needs to be redrawn, since
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* the application window was modified.
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*
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* This is basically called when SDL_VIDEOEXPOSE was received.
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*/
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virtual void notifyVideoExpose() = 0;
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/**
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* Notify the graphics manager about a resize event.
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*
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* It is noteworthy that the requested width/height should actually be set
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* up as is and not changed by the graphics manager, since otherwise it may
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* lead to odd behavior for certain window managers.
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*
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* It is only required to overwrite this method in case you want a
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* resizable window. The default implementation just does nothing.
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*
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* @param width Requested window width.
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* @param height Requested window height.
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*/
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virtual void notifyResize(const int width, const int height) {}
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/**
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* Notifies the graphics manager about a mouse position change.
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*
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* The passed point *must* be converted from window coordinates to virtual
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* coordinates in order for the event to be processed correctly by the game
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* engine. Just use `convertWindowToVirtual` for this unless you need to do
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* something special.
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*
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* @param mouse The mouse position in window coordinates, which must be
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* converted synchronously to virtual coordinates.
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* @returns true if the mouse was in a valid position for the game and
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* should cause the event to be sent to the game.
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*/
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virtual bool notifyMousePosition(Common::Point &mouse);
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virtual bool showMouse(bool visible) override;
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virtual bool lockMouse(bool lock) override;
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virtual bool saveScreenshot(const Common::String &filename) const { return false; }
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void saveScreenshot() override;
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// Override from Common::EventObserver
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virtual bool notifyEvent(const Common::Event &event) override;
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/**
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* A (subset) of the graphic manager's state. This is used when switching
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* between different SDL graphic managers at runtime.
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*/
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struct State {
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int screenWidth, screenHeight;
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bool aspectRatio;
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bool fullscreen;
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bool cursorPalette;
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#ifdef USE_RGB_COLOR
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Graphics::PixelFormat pixelFormat;
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#endif
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};
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/**
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* Gets the current state of the graphics manager.
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*/
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State getState() const;
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/**
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* Sets up a basic state of the graphics manager.
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*/
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bool setState(const State &state);
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/**
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* @returns the SDL window.
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*/
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SdlWindow *getWindow() const { return _window; }
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virtual void initSizeHint(const Graphics::ModeList &modes) override;
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Common::Keymap *getKeymap();
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protected:
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enum CustomEventAction {
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kActionToggleFullscreen = 100,
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kActionToggleMouseCapture,
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kActionSaveScreenshot,
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kActionToggleAspectRatioCorrection,
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kActionToggleFilteredScaling,
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kActionCycleStretchMode,
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kActionIncreaseScaleFactor,
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kActionDecreaseScaleFactor,
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kActionNextScaleFilter,
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kActionPreviousScaleFilter
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};
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/** Obtain the user configured fullscreen resolution, or default to the desktop resolution */
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Common::Rect getPreferredFullscreenResolution();
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virtual int getGraphicsModeScale(int mode) const = 0;
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bool defaultGraphicsModeConfig() const;
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int getGraphicsModeIdByName(const Common::String &name) const;
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/**
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* Gets the dimensions of the window directly from SDL instead of from the
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* values stored by the graphics manager.
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*/
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void getWindowSizeFromSdl(int *width, int *height) const {
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#if SDL_VERSION_ATLEAST(2, 0, 0)
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assert(_window);
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SDL_GL_GetDrawableSize(_window->getSDLWindow(), width, height);
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#else
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assert(_hwScreen);
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if (width) {
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*width = _hwScreen->w;
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}
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if (height) {
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*height = _hwScreen->h;
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}
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#endif
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}
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/**
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* Gets the display index that the ScummVM window is on
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*/
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void getWindowDisplayIndexFromSdl(int *index) const {
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#if SDL_VERSION_ATLEAST(2, 0, 0)
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assert(_window);
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*index = SDL_GetWindowDisplayIndex(_window->getSDLWindow());
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#else
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*index = 0;
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#endif
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}
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void getDisplayDpiFromSdl(float *dpi, float *defaultDpi) const {
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const float systemDpi =
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#ifdef __APPLE__
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72.0f;
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#elif defined(_WIN32)
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96.0f;
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#else
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90.0f; // ScummVM default
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#endif
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if (defaultDpi)
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*defaultDpi = systemDpi;
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if (dpi) {
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#if SDL_VERSION_ATLEAST(2, 0, 4)
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int displayIndex = 0;
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getWindowDisplayIndexFromSdl(&displayIndex);
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if (SDL_GetDisplayDPI(displayIndex, NULL, dpi, NULL) != 0) {
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*dpi = systemDpi;
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}
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#else
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*dpi = systemDpi;
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#endif
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}
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}
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/**
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* Returns the scaling mode based on the display DPI
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*/
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void getDpiScalingFactor(uint *scale) const {
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float dpi, defaultDpi, ratio;
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getDisplayDpiFromSdl(&dpi, &defaultDpi);
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debug(4, "dpi: %g default: %g", dpi, defaultDpi);
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ratio = dpi / defaultDpi;
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if (ratio >= 1.5f) {
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*scale = 2;
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} else {
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*scale = 1;
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}
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}
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virtual void setSystemMousePosition(const int x, const int y) override;
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virtual void handleResizeImpl(const int width, const int height) override;
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#if SDL_VERSION_ATLEAST(2, 0, 0)
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public:
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void unlockWindowSize() {
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_allowWindowSizeReset = true;
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_hintedWidth = 0;
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_hintedHeight = 0;
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}
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protected:
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Uint32 _lastFlags;
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bool _allowWindowSizeReset;
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int _hintedWidth, _hintedHeight;
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bool createOrUpdateWindow(const int width, const int height, const Uint32 flags);
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#endif
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SDL_Surface *_hwScreen;
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SdlEventSource *_eventSource;
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SdlWindow *_window;
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private:
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void toggleFullScreen();
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};
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#endif
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