void updateGraphicsTest(struct gameboy * gameboy)
{
//fill a frame buffer with some simple pixel data and see if it draws correctly
setLCDStatus(gameboy);
uint8_t previousMode = getCurrentMode(gameboy);
requestAnyNewModeInterrupts(gameboy, previousMode);
if (isLCDEnabled(gameboy)){
gameboy->screen.scanlineCounter += gameboy->cpu.previousInstruction.cycles;
}
else {
return;
}
if (gameboy->screen.scanlineCounter >= SCANLINE_CYCLE_TIME){
gameboy->screen.currentScanline++;
gameboy->screen.scanlineCounter = 0;
if (gameboy->screen.currentScanline == Y){
requestInterrupt(gameboy, int_vblank);
//printf("start vblank\n");
}
else if (gameboy->screen.currentScanline > (Y + NO_OF_INVISIBLE_SCANLINES)){
gameboy->screen.currentScanline = 0;
//printf("resetting scanline\n");
}
else if (gameboy->screen.currentScanline < Y){
// printf("drawing scanline %d\n", gameboy->screen.currentScanline);
drawScanline(gameboy);
}
else {
//printf("In vblank\n");
}
}
}
void Video::updateGraphics(const int &cycles, CPU &cpuTemp)
{
setLCDStatus(cpuTemp);
if (isLCDEnabled())
_scanLineCounter -= cycles;
else
return;
if (_scanLineCounter <= 0)
{
// time to move onto next scanline
_memory->directModification(LY, _memory->read(LY) + 1);
BYTE currentline = _memory->read(LY);
_scanLineCounter = 456;
// we have entered vertical blank period
if (currentline == 144)
cpuTemp.requestInterrupt(VBlank);
// if gone past scanline 153 reset to 0
else if (currentline > 153)
_memory->directModification(LY, 0x00);
// draw the current scanline
else if (currentline < 144)
drawScanLine();
}
}
void updateGraphics(struct gameboy * gameboy)
{
int cycles = gameboy->cpu.previousInstruction.cycles;
uint8_t previousMode = getCurrentMode(gameboy);
setLCDStatus(gameboy);
requestAnyNewModeInterrupts(gameboy, previousMode);
doCoincidenceFlag(gameboy);
if (isLCDEnabled(gameboy)){
gameboy->screen.scanlineCounter += cycles;
doScanline(gameboy);
}
}
