mirror of
https://github.com/RetroDECK/ES-DE.git
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302 lines
10 KiB
C++
302 lines
10 KiB
C++
//
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// Renderer.cpp
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//
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// General rendering functions.
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//
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#include "renderers/Renderer.h"
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#include "math/Transform4x4f.h"
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#include "math/Vector2i.h"
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#include "resources/ResourceManager.h"
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#include "ImageIO.h"
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#include "Log.h"
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#include "Settings.h"
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#if defined(__linux__) || defined(_WIN64)
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#include <SDL2/SDL.h>
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#else
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#include "SDL.h"
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#endif
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#include <stack>
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namespace Renderer
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{
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static std::stack<Rect> clipStack;
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static SDL_Window* sdlWindow = nullptr;
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static int windowWidth = 0;
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static int windowHeight = 0;
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static int screenWidth = 0;
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static int screenHeight = 0;
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static int screenOffsetX = 0;
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static int screenOffsetY = 0;
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static int screenRotate = 0;
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static bool initialCursorState = 1;
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static void setIcon()
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{
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size_t width = 0;
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size_t height = 0;
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ResourceData resData = ResourceManager::getInstance()->
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getFileData(":/graphics/window_icon_256.png");
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std::vector<unsigned char> rawData =
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ImageIO::loadFromMemoryRGBA32(resData.ptr.get(), resData.length, width, height);
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if (!rawData.empty()) {
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ImageIO::flipPixelsVert(rawData.data(), width, height);
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#if SDL_BYTEORDER == SDL_BIG_ENDIAN
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unsigned int rmask = 0xFF000000;
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unsigned int gmask = 0x00FF0000;
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unsigned int bmask = 0x0000FF00;
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unsigned int amask = 0x000000FF;
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#else
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unsigned int rmask = 0x000000FF;
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unsigned int gmask = 0x0000FF00;
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unsigned int bmask = 0x00FF0000;
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unsigned int amask = 0xFF000000;
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#endif
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// Try creating SDL surface from logo data.
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SDL_Surface* logoSurface = SDL_CreateRGBSurfaceFrom((void*)rawData.data(),
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(int)width, (int)height, 32, (int)(width * 4), rmask, gmask, bmask, amask);
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if (logoSurface != nullptr) {
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SDL_SetWindowIcon(sdlWindow, logoSurface);
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SDL_FreeSurface(logoSurface);
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}
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}
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}
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static bool createWindow()
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{
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LOG(LogInfo) << "Creating window...";
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if (SDL_Init(SDL_INIT_VIDEO) != 0) {
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LOG(LogError) << "Error initializing SDL!\n " << SDL_GetError();
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return false;
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}
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initialCursorState = (SDL_ShowCursor(0) != 0);
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SDL_DisplayMode dispMode;
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SDL_GetDesktopDisplayMode(0, &dispMode);
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windowWidth = Settings::getInstance()->getInt("WindowWidth") ?
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Settings::getInstance()->getInt("WindowWidth") : dispMode.w;
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windowHeight = Settings::getInstance()->getInt("WindowHeight") ?
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Settings::getInstance()->getInt("WindowHeight") : dispMode.h;
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screenWidth = Settings::getInstance()->getInt("ScreenWidth") ?
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Settings::getInstance()->getInt("ScreenWidth") : windowWidth;
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screenHeight = Settings::getInstance()->getInt("ScreenHeight") ?
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Settings::getInstance()->getInt("ScreenHeight") : windowHeight;
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screenOffsetX = Settings::getInstance()->getInt("ScreenOffsetX") ?
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Settings::getInstance()->getInt("ScreenOffsetX") : 0;
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screenOffsetY = Settings::getInstance()->getInt("ScreenOffsetY") ?
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Settings::getInstance()->getInt("ScreenOffsetY") : 0;
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screenRotate = Settings::getInstance()->getInt("ScreenRotate") ?
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Settings::getInstance()->getInt("ScreenRotate") : 0;
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// Prevent ES window from minimizing when switching windows (when launching
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// games or when manually switching windows using task switcher).
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SDL_SetHint(SDL_HINT_VIDEO_MINIMIZE_ON_FOCUS_LOSS, "0");
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setupWindow();
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unsigned int windowFlags;
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if (Settings::getInstance()->getBool("Windowed"))
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windowFlags = getWindowFlags();
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else if (Settings::getInstance()->getString("FullscreenMode") == "borderless")
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windowFlags = SDL_WINDOW_BORDERLESS | SDL_WINDOW_ALWAYS_ON_TOP | getWindowFlags();
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else
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windowFlags = SDL_WINDOW_FULLSCREEN | getWindowFlags();
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if ((sdlWindow = SDL_CreateWindow("EmulationStation", SDL_WINDOWPOS_UNDEFINED,
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SDL_WINDOWPOS_UNDEFINED, windowWidth, windowHeight, windowFlags)) == nullptr) {
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LOG(LogError) << "Error creating SDL window!\n\t" << SDL_GetError();
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return false;
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}
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LOG(LogInfo) << "Created window successfully.";
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createContext();
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setIcon();
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setSwapInterval();
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return true;
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}
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static void destroyWindow()
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{
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destroyContext();
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SDL_DestroyWindow(sdlWindow);
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sdlWindow = nullptr;
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SDL_ShowCursor(initialCursorState);
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SDL_Quit();
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}
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bool init()
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{
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if (!createWindow())
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return false;
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Transform4x4f projection = Transform4x4f::Identity();
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Rect viewport = Rect(0, 0, 0, 0);
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switch (screenRotate) {
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case 0: {
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viewport.x = screenOffsetX;
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viewport.y = screenOffsetY;
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viewport.w = screenWidth;
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viewport.h = screenHeight;
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projection.orthoProjection(0, screenWidth, screenHeight, 0, -1.0, 1.0);
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}
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break;
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case 1: {
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viewport.x = windowWidth - screenOffsetY - screenHeight;
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viewport.y = screenOffsetX;
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viewport.w = screenHeight;
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viewport.h = screenWidth;
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projection.orthoProjection(0, screenHeight, screenWidth, 0, -1.0, 1.0);
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projection.rotate((float)ES_DEG_TO_RAD(90), {0, 0, 1});
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projection.translate({0, screenHeight * -1.0f, 0});
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}
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break;
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case 2: {
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viewport.x = windowWidth - screenOffsetX - screenWidth;
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viewport.y = windowHeight - screenOffsetY - screenHeight;
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viewport.w = screenWidth;
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viewport.h = screenHeight;
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projection.orthoProjection(0, screenWidth, screenHeight, 0, -1.0, 1.0);
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projection.rotate((float)ES_DEG_TO_RAD(180), {0, 0, 1});
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projection.translate({screenWidth * -1.0f, screenHeight * -1.0f, 0});
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}
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break;
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case 3: {
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viewport.x = screenOffsetY;
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viewport.y = windowHeight - screenOffsetX - screenWidth;
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viewport.w = screenHeight;
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viewport.h = screenWidth;
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projection.orthoProjection(0, screenHeight, screenWidth, 0, -1.0, 1.0);
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projection.rotate((float)ES_DEG_TO_RAD(270), {0, 0, 1});
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projection.translate({screenWidth * -1.0f, 0, 0});
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}
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break;
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}
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setViewport(viewport);
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setProjection(projection);
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swapBuffers();
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return true;
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}
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void deinit()
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{
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destroyWindow();
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}
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void pushClipRect(const Vector2i& _pos, const Vector2i& _size)
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{
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Rect box(_pos.x(), _pos.y(), _size.x(), _size.y());
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if (box.w == 0)
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box.w = screenWidth - box.x;
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if (box.h == 0)
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box.h = screenHeight - box.y;
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switch (screenRotate) {
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case 0: {
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box = Rect(screenOffsetX + box.x, screenOffsetY + box.y, box.w, box.h);
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}
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break;
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case 1: {
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box = Rect(windowWidth - screenOffsetY - box.y - box.h, screenOffsetX +
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box.x, box.h, box.w);
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}
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break;
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case 2: {
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box = Rect(windowWidth - screenOffsetX - box.x - box.w, windowHeight -
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screenOffsetY - box.y - box.h, box.w, box.h);
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}
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break;
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case 3: {
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box = Rect(screenOffsetY + box.y, windowHeight - screenOffsetX - box.x -
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box.w, box.h, box.w);
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}
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break;
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}
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// Make sure the box fits within clipStack.top(), and clip further accordingly.
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if (clipStack.size()) {
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const Rect& top = clipStack.top();
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if ( top.x > box.x) box.x = top.x;
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if ( top.y > box.y) box.y = top.y;
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if ((top.x + top.w) < (box.x + box.w)) box.w = (top.x + top.w) - box.x;
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if ((top.y + top.h) < (box.y + box.h)) box.h = (top.y + top.h) - box.y;
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}
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if (box.w < 0) box.w = 0;
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if (box.h < 0) box.h = 0;
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clipStack.push(box);
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setScissor(box);
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}
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void popClipRect()
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{
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if (clipStack.empty()) {
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LOG(LogError) << "Tried to popClipRect while the stack was empty!";
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return;
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}
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clipStack.pop();
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if (clipStack.empty())
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setScissor(Rect(0, 0, 0, 0));
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else
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setScissor(clipStack.top());
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}
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void drawRect(
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const float _x,
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const float _y,
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const float _w,
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const float _h,
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const unsigned int _color,
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const unsigned int _colorEnd,
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bool horizontalGradient,
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const Blend::Factor _srcBlendFactor,
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const Blend::Factor _dstBlendFactor)
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{
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const unsigned int color = convertColor(_color);
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const unsigned int colorEnd = convertColor(_colorEnd);
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Vertex vertices[4];
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vertices[0] = { { _x ,_y }, { 0.0f, 0.0f }, color };
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vertices[1] = { { _x ,_y + _h }, { 0.0f, 0.0f }, horizontalGradient ? colorEnd : color };
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vertices[2] = { { _x + _w,_y }, { 0.0f, 0.0f }, horizontalGradient ? color : colorEnd };
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vertices[3] = { { _x + _w,_y + _h }, { 0.0f, 0.0f }, colorEnd };
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// Round vertices.
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for (int i = 0; i < 4; ++i)
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vertices[i].pos.round();
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bindTexture(0);
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drawTriangleStrips(vertices, 4, _srcBlendFactor, _dstBlendFactor);
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}
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SDL_Window* getSDLWindow() { return sdlWindow; }
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int getWindowWidth() { return windowWidth; }
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int getWindowHeight() { return windowHeight; }
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int getScreenWidth() { return screenWidth; }
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int getScreenHeight() { return screenHeight; }
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int getScreenOffsetX() { return screenOffsetX; }
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int getScreenOffsetY() { return screenOffsetY; }
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int getScreenRotate() { return screenRotate; }
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} // Renderer::
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