Initial Commit

1 files changed, 72 insertions, 0 deletions

diff --git a/screen.c b/screen.c
new file mode 100644
index 0000000..7f8e767
--- /dev/null
+++ b/screen.c
@@ -0,0 +1,72 @@
+#include "screen.h"
+
+SDL_Window *gWindow = NULL;
+SDL_Surface *gScreenSurface = NULL;
+SDL_Surface *ballSurface = NULL;
+SDL_Surface *leftPaddleSurface = NULL;
+SDL_Surface *rightPaddleSurface = NULL;
+
+static SDL_Surface *LoadSurface( const char * const path ) {
+    SDL_Surface *optimizedSurface = NULL;
+    SDL_Surface * loadedSurface = SDL_LoadBMP( path );
+    if ( loadedSurface == NULL ) {
+        printf( "Unable to load image %s! SDL Error: %s\n", path, SDL_GetError() );
+        return NULL;
+    }
+    optimizedSurface = SDL_ConvertSurface( loadedSurface, gScreenSurface->format, 0 );
+    if ( optimizedSurface == NULL ) {
+        printf( "Unable to optimize image %s! SDL Error: %s\n", path, SDL_GetError() );
+        return NULL;
+    }
+    SDL_FreeSurface( loadedSurface );
+    return optimizedSurface;
+}
+
+bool InitScreen ( void ) {
+    if ( SDL_Init( SDL_INIT_VIDEO ) < 0 ) {
+        printf( "SDL could not initialize! SDL Error: %s\n", SDL_GetError() );
+        return false;
+    }
+    gWindow = SDL_CreateWindow( "Pong", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
+                                SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN );
+    if ( gWindow == NULL ) {
+        printf( "Window could not be created! SDL Error: %s\n", SDL_GetError() );
+        return false;
+    }
+    gScreenSurface = SDL_GetWindowSurface( gWindow );
+
+    ClearScreen();
+
+    ballSurface = LoadSurface( "ball.bmp" );
+    leftPaddleSurface = LoadSurface( "paddle.bmp" );
+    rightPaddleSurface = LoadSurface( "paddle.bmp" );
+
+    return true;
+}
+
+void Close ( void ) {
+    SDL_FreeSurface( rightPaddleSurface );
+    rightPaddleSurface = NULL;
+    SDL_FreeSurface( leftPaddleSurface );
+    leftPaddleSurface = NULL;
+    SDL_FreeSurface( ballSurface );
+    ballSurface = NULL;
+    SDL_FreeSurface( gScreenSurface );
+    gScreenSurface = NULL;
+    SDL_DestroyWindow( gWindow );
+    gWindow = NULL;
+    SDL_Quit();
+}
+
+void Draw ( const struct moveable_t m, SDL_Surface * const surface ) {
+    SDL_Rect drect = { m.position.x, m.position.y, m.width, m.height };
+    const int status = SDL_BlitSurface( surface, NULL, gScreenSurface, &drect );
+    if ( status < 0 ) {
+        printf( "Error with draw! SDL Error: %s\n", SDL_GetError() );
+    }
+}
+
+void ClearScreen( void ) {
+    SDL_FillRect( gScreenSurface, NULL, SDL_MapRGB( gScreenSurface->format, 0x00, 0x00, 0x00 ) );
+    SDL_UpdateWindowSurface( gWindow );
+}