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