// Draw the buffer memory onto the screen using the overlay
static int DispDrawOverlay()
{
if (DispBack!=NULL)
{
MemToSurf(DispBack);
DispOver->Flip(NULL,DDFLIP_WAIT);
}
else
{
MemToSurf(DispOver);
}
// Resize the overlay if needed
OverlayPut();
return 0;
}
// Paint the BlitFX surface onto the primary surface
static int Paint(int bValidate)
{
SDL_Rect sdlrDest = { 0, 0, nGameWidth * nSize, nGameHeight * nSize };
if (bValidate & 2) {
MemToSurf(); // Copy the memory buffer to the directdraw buffer for later blitting
}
if (nVidFullscreen) {
// Double bufferring
sdlrDest.x = (nVidScrnWidth - nGameWidth * nSize) / 2;
sdlrDest.y = (nVidScrnHeight - nGameHeight * nSize) / 2;
if (SDL_BlitSurface(sdlsBlitFX[nUseSys], NULL, sdlsFramebuf, &sdlrDest)) {
return 1;
}
SDL_Flip(sdlsFramebuf);
} else {
// Normal
if (SDL_BlitSurface(sdlsBlitFX[nUseSys], NULL, sdlsFramebuf, &sdlrDest)) {
return 1;
}
SDL_UpdateRect(sdlsFramebuf, 0, 0, 0, 0);
}
return 0;
}
// Run one frame and render the screen
static int Frame(bool bRedraw) // bRedraw = 0
{
//if (pVidImage == NULL) {
if( sdlFramebuf == NULL ) {
printf("sdlFramebuf==NULL");
return 1;
}
if (bDrvOkay) {
if (bRedraw) { // Redraw current frame
if (BurnDrvRedraw()) {
BurnDrvFrame(); // No redraw function provided, advance one frame
}
} else {
BurnDrvFrame(); // Run one frame and draw the screen
}
}
else
{
printf("bDrvOkay != TRUE");
return 1;
}
MemToSurf(); // Copy the memory buffer to the directdraw buffer for later blitting
return 0;
}
// Draw the buffer memory onto the primary surface
int DispDraw()
{
int Ret=0;
if (DispPrim==NULL) return 1;
if (DispPrim->IsLost()) { DispPrim->Restore(); } // Restore surface if lost
if (DispOver!=NULL) { return DispDrawOverlay(); } // Use overlay if present
// Else use normal Buffer
if (DispBuff==NULL) return 1;
if (DispBuff->IsLost()) { DispBuff->Restore(); } // Restore surface if lost
// buffer memory --> buffer surface
Ret=MemToSurf(DispBuff); if (Ret!=0) return 1;
return NormalPut();
}
