Include C test program in repo

2020-10-19 22:17:32 -06:00
parent 82126eca3c
commit d3a2cbd2b2
14 changed files with 940 additions and 56 deletions
@@ -0,0 +1,115 @@
+#include "context.h"
+
+#include <string.h>
+
+static SDL_Window *s_sdlWindow;
+static SDL_GLContext s_sdlGlContext;
+static SDL_GameController *s_controller;
+static int s_windowWidth;
+static int s_windowHeight;
+
+void context_init( const char *title, int width, int height )
+{
+    if( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_JOYSTICK ) < 0 ) goto err;
+
+    SDL_GL_SetAttribute( SDL_GL_MULTISAMPLEBUFFERS, 1 );
+    SDL_GL_SetAttribute( SDL_GL_MULTISAMPLESAMPLES, 4 );
+    SDL_GL_SetAttribute( SDL_GL_CONTEXT_MAJOR_VERSION, 4 );
+    SDL_GL_SetAttribute( SDL_GL_CONTEXT_MINOR_VERSION, 1 );
+    SDL_GL_SetAttribute( SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE );
+    SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );
+    SDL_GL_SetSwapInterval( 1 );
+
+    s_windowWidth = width;
+    s_windowHeight = height;
+
+    s_sdlWindow = SDL_CreateWindow( 
+        title,
+        SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
+        width, height,
+        SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE
+    );
+
+    if( !s_sdlWindow ) goto err;
+
+    s_sdlGlContext = SDL_GL_CreateContext( s_sdlWindow );
+
+    if( !s_sdlGlContext ) goto err;
+
+    #ifndef __APPLE__
+        glewExperimental = GL_TRUE;
+        const GLenum glewInitResult = glewInit();
+        if( glewInitResult != GLEW_OK ) goto err;
+    #endif
+
+    s_controller = NULL;
+
+    for( int i = 0; i < SDL_NumJoysticks(); ++i ) 
+    {
+        if( ! SDL_IsGameController( i ) ) continue;
+        s_controller = SDL_GameControllerOpen( i );
+        printf( "Using game controller: %s", SDL_GameControllerName( s_controller ) );
+        if( s_controller ) break;
+    }
+
+    return;
+
+err:
+    SDL_GL_DeleteContext( s_sdlGlContext );
+    SDL_DestroyWindow( s_sdlWindow );
+    SDL_Quit();
+}
+
+SDL_GameController *context_get_controller( void )
+{
+    return s_controller;
+}
+
+bool context_flip_frame_poll_events( void )
+{
+    bool still_running = true;
+
+    SDL_GL_SwapWindow( s_sdlWindow );
+
+    SDL_Event event;
+
+    while( SDL_PollEvent( &event ) )
+    {
+        switch( event.type )
+        {
+        case SDL_QUIT:
+            still_running = false;
+            break;
+
+        case SDL_KEYDOWN:
+            if( event.key.keysym.sym == SDLK_ESCAPE )
+                still_running = false;
+
+        case SDL_WINDOWEVENT:
+            if( event.window.event == SDL_WINDOWEVENT_SIZE_CHANGED )
+            {
+                s_windowWidth = event.window.data1;
+                s_windowHeight = event.window.data2;
+                glViewport( 0, 0, s_windowWidth, s_windowHeight );
+            }
+            break;
+        }
+    }
+
+    return still_running;
+}
+
+void context_terminate( void )
+{
+    if( !s_sdlWindow )
+        return;
+
+    if( s_controller )
+        SDL_GameControllerClose( s_controller );
+
+    SDL_GL_DeleteContext( s_sdlGlContext );
+    SDL_DestroyWindow( s_sdlWindow );
+    SDL_Quit();
+
+    s_sdlWindow = NULL;
+}