153 lines
3.4 KiB
C++
153 lines
3.4 KiB
C++
/*
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* Modification History
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*
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* 2000-November-18 Jason Rohrer
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* Created.
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*
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* 2000-November-19 Jason Rohrer
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* Change so that it doesn't use SDL's interrupt parachute, i.e.,
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* so it will quit on ^c.
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*
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* 2001-May-1 Jason Rohrer
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* Changed to use more standard SDL include location.
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*
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* 2006-April-28 Jason Rohrer
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* Added functions for more direct access to screen pixels.
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*
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* 2006-June-26 Jason Rohrer
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* Added support for dirty rectangle.
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* Added resize support.
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*/
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#include "minorGems/graphics/ScreenGraphics.h"
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#include <SDL/SDL.h>
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/**
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* Note: Linux implementation uses windowed mode.
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*/
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ScreenGraphics::ScreenGraphics( int inWidth, int inHeight )
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: mWidth( inWidth ), mHeight( inHeight ) {
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if( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 ) {
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printf( "Couldn't initialize SDL: %s\n", SDL_GetError() );
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return;
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}
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SDL_Surface *screen = SDL_SetVideoMode( mWidth, mHeight,
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32, SDL_SWSURFACE );
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if ( screen == NULL ) {
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printf( "Couldn't set %dx%dx32 video mode: %s\n", mWidth, mHeight,
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SDL_GetError() );
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return;
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}
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mNativeObjectPointer = (void*)screen;
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}
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ScreenGraphics::~ScreenGraphics() {
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SDL_Quit();
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}
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void ScreenGraphics::resize( int inNewWidth, int inNewHeight ) {
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mWidth = inNewWidth;
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mHeight = inNewHeight;
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SDL_Surface *screen = SDL_SetVideoMode( mWidth, mHeight,
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32, SDL_SWSURFACE );
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if ( screen == NULL ) {
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printf( "Couldn't set %dx%dx32 video mode: %s\n", mWidth, mHeight,
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SDL_GetError() );
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return;
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}
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mNativeObjectPointer = (void*)screen;
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}
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char ScreenGraphics::isResolutionAvailable( int inWidth, int inHeight ) {
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if( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 ) {
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printf( "Couldn't initialize SDL: %s\n", SDL_GetError() );
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return false;
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}
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// ask SDL if this screen size is supported
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char videoModeOk =
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(char)SDL_VideoModeOK( inWidth, inHeight, 32, SDL_SWSURFACE );
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SDL_Quit();
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return videoModeOk;
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}
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void ScreenGraphics::swapBuffers( GraphicBuffer *inOutBuffer ) {
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if( inOutBuffer->getHeight() != mHeight ||
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inOutBuffer->getWidth() != mWidth ) {
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printf( "Buffer of incorrect size passed to screen.\n" );
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return;
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}
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SDL_Surface *screen = (SDL_Surface*)mNativeObjectPointer;
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// check if we need to lock the screen
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if( SDL_MUSTLOCK( screen ) ) {
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if( SDL_LockSurface( screen ) < 0 ) {
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printf( "Couldn't lock screen: %s\n", SDL_GetError() );
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return;
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}
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}
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Uint32 *buffer = (Uint32 *)( screen->pixels );
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memcpy( (void*)buffer, (void*)( inOutBuffer->getBuffer() ),
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mWidth * mHeight * 4 );
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// unlock the screen if necessary
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if ( SDL_MUSTLOCK(screen) ) {
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SDL_UnlockSurface(screen);
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}
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SDL_Flip( screen );
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}
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GraphicBuffer *ScreenGraphics::getScreenBuffer() {
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SDL_Surface *screen = (SDL_Surface*)mNativeObjectPointer;
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Uint32 *buffer = (Uint32 *)( screen->pixels );
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return new GraphicBuffer( (unsigned long *)buffer, mWidth, mHeight );
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}
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void ScreenGraphics::flipDirtyRectangle( int inTopLeftX, int inTopLeftY,
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int inWidth, int inHeight ) {
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SDL_Surface *screen = (SDL_Surface*)mNativeObjectPointer;
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SDL_UpdateRect( screen, inTopLeftX, inTopLeftY, inWidth, inHeight );
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}
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void ScreenGraphics::flipScreen() {
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SDL_Surface *screen = (SDL_Surface*)mNativeObjectPointer;
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SDL_Flip( screen );
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}
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