mirror of https://github.com/bsnes-emu/bsnes.git
150 lines
3.7 KiB
C++
150 lines
3.7 KiB
C++
#include <sfc/sfc.hpp>
|
|
|
|
namespace SuperFamicom {
|
|
|
|
PPU ppu;
|
|
|
|
#include "mmio/mmio.cpp"
|
|
#include "window/window.cpp"
|
|
#include "cache/cache.cpp"
|
|
#include "background/background.cpp"
|
|
#include "sprite/sprite.cpp"
|
|
#include "screen/screen.cpp"
|
|
#include "serialization.cpp"
|
|
|
|
PPU::PPU() :
|
|
cache(*this),
|
|
bg1(*this, Background::ID::BG1),
|
|
bg2(*this, Background::ID::BG2),
|
|
bg3(*this, Background::ID::BG3),
|
|
bg4(*this, Background::ID::BG4),
|
|
sprite(*this),
|
|
screen(*this) {
|
|
surface = new uint32[512 * 512];
|
|
output = surface + 16 * 512;
|
|
display.width = 256;
|
|
display.height = 224;
|
|
display.frameskip = 0;
|
|
display.framecounter = 0;
|
|
}
|
|
|
|
PPU::~PPU() {
|
|
delete[] surface;
|
|
}
|
|
|
|
auto PPU::step(uint clocks) -> void {
|
|
clock += clocks;
|
|
}
|
|
|
|
auto PPU::synchronizeCPU() -> void {
|
|
if(CPU::Threaded == true) {
|
|
if(clock >= 0 && scheduler.sync != Scheduler::SynchronizeMode::All) co_switch(cpu.thread);
|
|
} else {
|
|
while(clock >= 0) cpu.enter();
|
|
}
|
|
}
|
|
|
|
auto PPU::Enter() -> void { ppu.enter(); }
|
|
|
|
auto PPU::enter() -> void {
|
|
while(true) {
|
|
if(scheduler.sync == Scheduler::SynchronizeMode::All) {
|
|
scheduler.exit(Scheduler::ExitReason::SynchronizeEvent);
|
|
}
|
|
|
|
scanline();
|
|
if(vcounter() < display.height && vcounter()) {
|
|
add_clocks(512);
|
|
render_scanline();
|
|
add_clocks(lineclocks() - 512);
|
|
} else {
|
|
add_clocks(lineclocks());
|
|
}
|
|
}
|
|
}
|
|
|
|
auto PPU::add_clocks(uint clocks) -> void {
|
|
tick(clocks);
|
|
step(clocks);
|
|
synchronizeCPU();
|
|
}
|
|
|
|
auto PPU::render_scanline() -> void {
|
|
if(display.framecounter) return; //skip this frame?
|
|
bg1.scanline();
|
|
bg2.scanline();
|
|
bg3.scanline();
|
|
bg4.scanline();
|
|
if(regs.display_disable) return screen.render_black();
|
|
screen.scanline();
|
|
bg1.render();
|
|
bg2.render();
|
|
bg3.render();
|
|
bg4.render();
|
|
sprite.render();
|
|
screen.render();
|
|
}
|
|
|
|
auto PPU::scanline() -> void {
|
|
display.width = !hires() ? 256 : 512;
|
|
display.height = !overscan() ? 225 : 240;
|
|
if(vcounter() == 0) frame();
|
|
if(vcounter() == display.height && regs.display_disable == false) sprite.address_reset();
|
|
}
|
|
|
|
auto PPU::frame() -> void {
|
|
sprite.frame();
|
|
system.frame();
|
|
display.interlace = regs.interlace;
|
|
display.overscan = regs.overscan;
|
|
display.framecounter = display.frameskip == 0 ? 0 : (display.framecounter + 1) % display.frameskip;
|
|
}
|
|
|
|
auto PPU::enable() -> void {
|
|
function<uint8 (uint)> reader = {&PPU::mmio_read, (PPU*)&ppu};
|
|
function<void (uint, uint8)> writer = {&PPU::mmio_write, (PPU*)&ppu};
|
|
|
|
bus.map(reader, writer, 0x00, 0x3f, 0x2100, 0x213f);
|
|
bus.map(reader, writer, 0x80, 0xbf, 0x2100, 0x213f);
|
|
}
|
|
|
|
auto PPU::power() -> void {
|
|
for(auto& n : vram) n = 0;
|
|
for(auto& n : oam) n = 0;
|
|
for(auto& n : cgram) n = 0;
|
|
reset();
|
|
}
|
|
|
|
auto PPU::reset() -> void {
|
|
create(Enter, system.cpuFrequency());
|
|
PPUcounter::reset();
|
|
memset(surface, 0, 512 * 512 * sizeof(uint32));
|
|
mmio_reset();
|
|
display.interlace = false;
|
|
display.overscan = false;
|
|
}
|
|
|
|
auto PPU::layer_enable(uint layer, uint priority, bool enable) -> void {
|
|
switch(layer * 4 + priority) {
|
|
case 0: bg1.priority0_enable = enable; break;
|
|
case 1: bg1.priority1_enable = enable; break;
|
|
case 4: bg2.priority0_enable = enable; break;
|
|
case 5: bg2.priority1_enable = enable; break;
|
|
case 8: bg3.priority0_enable = enable; break;
|
|
case 9: bg3.priority1_enable = enable; break;
|
|
case 12: bg4.priority0_enable = enable; break;
|
|
case 13: bg4.priority1_enable = enable; break;
|
|
case 16: sprite.priority0_enable = enable; break;
|
|
case 17: sprite.priority1_enable = enable; break;
|
|
case 18: sprite.priority2_enable = enable; break;
|
|
case 19: sprite.priority3_enable = enable; break;
|
|
}
|
|
}
|
|
|
|
auto PPU::set_frameskip(uint frameskip) -> void {
|
|
display.frameskip = frameskip;
|
|
display.framecounter = 0;
|
|
}
|
|
|
|
}
|