headshot2017
114 lines
2.8 KiB
C
114 lines
2.8 KiB
C
#include "context.h"
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#include <string.h>
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static SDL_Window *s_sdlWindow;
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static SDL_GLContext s_sdlGlContext;
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static SDL_GameController *s_controller;
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static int s_windowWidth;
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static int s_windowHeight;
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void context_init( const char *title, int width, int height, int major, int minor )
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{
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if( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_JOYSTICK | SDL_INIT_AUDIO ) < 0 ) goto err;
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int profile = (major < 3) ? SDL_GL_CONTEXT_PROFILE_COMPATIBILITY : SDL_GL_CONTEXT_PROFILE_CORE;
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SDL_GL_SetAttribute( SDL_GL_CONTEXT_MAJOR_VERSION, major );
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SDL_GL_SetAttribute( SDL_GL_CONTEXT_MINOR_VERSION, minor );
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SDL_GL_SetAttribute( SDL_GL_CONTEXT_PROFILE_MASK, profile );
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SDL_GL_SetSwapInterval( 1 );
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s_windowWidth = width;
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s_windowHeight = height;
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s_sdlWindow = SDL_CreateWindow(
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title,
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SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
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width, height,
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SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE
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);
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if( !s_sdlWindow ) goto err;
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s_sdlGlContext = SDL_GL_CreateContext( s_sdlWindow );
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if( !s_sdlGlContext ) goto err;
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#ifndef __APPLE__
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glewExperimental = GL_TRUE;
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const GLenum glewInitResult = glewInit();
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if( glewInitResult != GLEW_OK ) goto err;
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#endif
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s_controller = NULL;
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for( int i = 0; i < SDL_NumJoysticks(); ++i )
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{
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if( ! SDL_IsGameController( i ) ) continue;
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s_controller = SDL_GameControllerOpen( i );
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printf( "Using game controller: %s", SDL_GameControllerName( s_controller ) );
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if( s_controller ) break;
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}
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return;
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err:
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SDL_GL_DeleteContext( s_sdlGlContext );
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SDL_DestroyWindow( s_sdlWindow );
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SDL_Quit();
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}
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SDL_GameController *context_get_controller( void )
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{
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return s_controller;
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}
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bool context_flip_frame_poll_events( void )
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{
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bool still_running = true;
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SDL_GL_SwapWindow( s_sdlWindow );
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SDL_Event event;
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while( SDL_PollEvent( &event ) )
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{
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switch( event.type )
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{
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case SDL_QUIT:
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still_running = false;
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break;
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case SDL_KEYDOWN:
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if( event.key.keysym.sym == SDLK_ESCAPE )
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still_running = false;
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case SDL_WINDOWEVENT:
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if( event.window.event == SDL_WINDOWEVENT_SIZE_CHANGED )
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{
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s_windowWidth = event.window.data1;
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s_windowHeight = event.window.data2;
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glViewport( 0, 0, s_windowWidth, s_windowHeight );
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}
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break;
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}
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}
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return still_running;
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}
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void context_terminate( void )
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{
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if( !s_sdlWindow )
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return;
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if( s_controller )
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SDL_GameControllerClose( s_controller );
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SDL_GL_DeleteContext( s_sdlGlContext );
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SDL_DestroyWindow( s_sdlWindow );
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SDL_Quit();
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s_sdlWindow = NULL;
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} |