検証環境
Windows10 Home Edition SDL 2.0.7 $ gcc --version gcc.exe (rubenvb-4.5.4) 4.5.4 Copyright (C) 2010 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
MinGW 環境に SDL2 をインストールする
こちらの手順でインストールする
takaya030.hatenablog.com
サンプルコード
同じディレクトリ内に以下の 2 ファイルを作成する
sdl2_sample.cpp
#include <GL/gl.h> #include <GL/glu.h> #include <SDL.h> #include <iostream> #define SDL_WINDOW_TITLE "SDL2" #define SDL_WINDOW_WIDTH (640) #define SDL_WINDOW_HEIGHT (480) #define SDL_PrintError(name) \ do { \ std::cerr << #name << ": " << SDL_GetError() << std::endl; \ } while (0) static SDL_Window *gWindow; static SDL_GLContext context; static bool initialize() { if (SDL_Init(SDL_INIT_EVERYTHING) < 0) { SDL_PrintError(SDL_Init); return false; } gWindow = SDL_CreateWindow(SDL_WINDOW_TITLE, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOW_WIDTH, SDL_WINDOW_HEIGHT, SDL_WINDOW_OPENGL|SDL_WINDOW_RESIZABLE); if (gWindow == NULL) { SDL_PrintError(SDL_CreateWindow); goto err1; } // create OpenGL Context context = SDL_GL_CreateContext(gWindow); if ( !context ) { SDL_PrintError(SDL_GL_CreateContext); goto err2; } return true; err2: SDL_DestroyWindow(gWindow); err1: SDL_Quit(); return false; } static bool initGL() { /* Enable smooth shading */ glShadeModel( GL_SMOOTH ); /* Set the background black */ glClearColor( 0.0f, 0.0f, 0.0f, 0.0f ); /* Depth buffer setup */ glClearDepth( 1.0f ); /* Enables Depth Testing */ glEnable( GL_DEPTH_TEST ); /* The Type Of Depth Test To Do */ glDepthFunc( GL_LEQUAL ); /* Really Nice Perspective Calculations */ glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ); return( TRUE ); } static bool resizeWindow( int width, int height ) { /* Height / width ration */ GLfloat ratio; /* Protect against a divide by zero */ if ( height == 0 ) height = 1; ratio = ( GLfloat )width / ( GLfloat )height; /* Setup our viewport. */ glViewport( 0, 0, ( GLsizei )width, ( GLsizei )height ); /* change to the projection matrix and set our viewing volume. */ glMatrixMode( GL_PROJECTION ); glLoadIdentity( ); /* Set our perspective */ gluPerspective( 45.0f, ratio, 0.1f, 100.0f ); /* Make sure we're chaning the model view and not the projection */ glMatrixMode( GL_MODELVIEW ); /* Reset The View */ glLoadIdentity( ); return( true ); } static void finalize() { SDL_GL_DeleteContext(context); SDL_DestroyWindow(gWindow); SDL_Quit(); } static void render() { /* Clear The Screen And The Depth Buffer */ glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); /* Move Left 1.5 Units And Into The Screen 6.0 */ glLoadIdentity(); glTranslatef( -1.5f, 0.0f, -6.0f ); glBegin( GL_TRIANGLES ); /* Drawing Using Triangles */ glColor3f( 1.0f, 0.0f, 0.0f ); /* Red */ glVertex3f( 0.0f, 1.0f, 0.0f ); /* Top Of Triangle */ glColor3f( 0.0f, 1.0f, 0.0f ); /* Green */ glVertex3f( -1.0f, -1.0f, 0.0f ); /* Left Of Triangle */ glColor3f( 0.0f, 0.0f, 1.0f ); /* Blue */ glVertex3f( 1.0f, -1.0f, 0.0f ); /* Right Of Triangle */ glEnd( ); /* Finished Drawing The Triangle */ /* Move Right 3 Units */ glTranslatef( 3.0f, 0.0f, 0.0f ); /* Set The Color To Blue One Time Only */ glColor3f( 0.5f, 0.5f, 1.0f); glBegin( GL_QUADS ); /* Draw A Quad */ glVertex3f( 1.0f, 1.0f, 0.0f ); /* Top Right Of The Quad */ glVertex3f( -1.0f, 1.0f, 0.0f ); /* Top Left Of The Quad */ glVertex3f( -1.0f, -1.0f, 0.0f ); /* Bottom Left Of The Quad */ glVertex3f( 1.0f, -1.0f, 0.0f ); /* Bottom Right Of The Quad */ glEnd( ); /* Done Drawing The Quad */ /* Draw it to the screen */ SDL_GL_SwapWindow(gWindow); /** NOTE: Sleep 10 msec. */ SDL_Delay(10); } static bool input() { SDL_Event event; /** NOTE: SDL_PollEvent does not sleep while SDL_WaitEvent sleep till event comes. SDL_WaitEvent is more relaxible than SDL_PollEvent. If input is combined with rendering, SDL_WaitEvent cannot be used. */ while (SDL_PollEvent(&event)) { switch (event.type) { case SDL_QUIT: return true; break; case SDL_WINDOWEVENT: switch( event.window.event ) { case SDL_WINDOWEVENT_RESIZED: /* handle resize event */ SDL_SetWindowSize( gWindow, event.window.data1, event.window.data2 ); resizeWindow( event.window.data1, event.window.data2 ); break; } break; default: break; } } return false; } int main(int argc, char *argv[]) { if (!initialize()) return 1; initGL(); resizeWindow( SDL_WINDOW_WIDTH, SDL_WINDOW_HEIGHT ); while (1) { if (input()) break; render(); } finalize(); return 0; }
Makefile
TARGETS = sdl2_sample all: $(TARGETS) SDL_PREFIX = /usr SDL_CONFIG = $(SDL_PREFIX)/bin/sdl2-config CG_LIBS = # 各自の環境に合わせて gcc, g++ のパスを設定する CROSS_COMPILE = /usr/local/bin CC = $(CROSS_COMPILE)gcc CXX = $(CROSS_COMPILE)g++ CFLAGS = -g -Wall `/bin/sh $(SDL_CONFIG) --cflags` CXXFLAGS = -g -Wall `/bin/sh $(SDL_CONFIG) --cflags` LDFLAGS = `/bin/sh $(SDL_CONFIG) --libs` -Wl,-rpath,$(SDL_PREFIX)/lib LIBS = -lopengl32 -lglu32 -lm clean: rm -f *.o *.a *~ $(TARGETS) sdl2_sample: sdl2_sample.o $(CXX) -o $@ $^ $(LDFLAGS) $(LIBS)
ビルド
$ make
実行
$ ./sdl2_sample.exe
このようなウィンドウが表示されれば成功です
