mirror of
https://github.com/RetroDECK/Supermodel.git
synced 2024-11-26 15:45:41 +00:00
d1d5175548
New gpuMultiThreaded config option to enable/disable multi-threaded rendering (enabled by default, disabling it reverts to previous behaviour). Other rendering optimisations: - texture uploads now only affect appropriate region in the texture sheet, rather than uploading the whole sheet each time - performance of clearing the model caches has been improved New Alt+O key input added to toggle outputting of frame timings for debugging purposes.
373 lines
10 KiB
C++
373 lines
10 KiB
C++
/**
|
|
** Supermodel
|
|
** A Sega Model 3 Arcade Emulator.
|
|
** Copyright 2011 Bart Trzynadlowski, Nik Henson
|
|
**
|
|
** This file is part of Supermodel.
|
|
**
|
|
** Supermodel is free software: you can redistribute it and/or modify it under
|
|
** the terms of the GNU General Public License as published by the Free
|
|
** Software Foundation, either version 3 of the License, or (at your option)
|
|
** any later version.
|
|
**
|
|
** Supermodel is distributed in the hope that it will be useful, but WITHOUT
|
|
** ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
** FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
** more details.
|
|
**
|
|
** You should have received a copy of the GNU General Public License along
|
|
** with Supermodel. If not, see <http://www.gnu.org/licenses/>.
|
|
**/
|
|
|
|
/*
|
|
* TileGen.cpp
|
|
*
|
|
* Implementation of the CTileGen class: 2D tile generator.
|
|
*
|
|
* TO-DO List:
|
|
* -----------
|
|
* - For consistency, the registers should probably be byte reversed (this is a
|
|
* little endian device), forcing the Model3 Read32/Write32 handlers to
|
|
* manually reverse the data. This keeps with the convention for VRAM.
|
|
*/
|
|
|
|
#include <cstring>
|
|
#include "Supermodel.h"
|
|
|
|
// Macros that divide memory regions into pages and mark them as dirty when they are written to
|
|
#define PAGE_WIDTH 10
|
|
#define PAGE_SIZE (1<<PAGE_WIDTH)
|
|
#define DIRTY_SIZE(arraySize) (1+(arraySize-1)/(8*PAGE_SIZE))
|
|
#define MARK_DIRTY(dirtyArray, addr) dirtyArray[addr>>(PAGE_WIDTH+3)] |= 1<<((addr>>PAGE_WIDTH)&7)
|
|
|
|
// Offsets of memory regions within TileGen memory pool
|
|
#define OFFSET_VRAM 0x000000
|
|
#define OFFSET_PAL 0x120000
|
|
#define MEM_POOL_SIZE_RW (0x120000+0x020000)
|
|
#define OFFSET_VRAM_RO 0x140000 // [read-only snapshot]
|
|
#define OFFSET_PAL_RO 0x260000 // [read-only snapshot]
|
|
#define MEM_POOL_SIZE_RO (0x120000+0x020000)
|
|
#define OFFSET_VRAM_DIRTY 0x280000
|
|
#define OFFSET_PAL_DIRTY (OFFSET_VRAM_DIRTY+DIRTY_SIZE(0x120000))
|
|
#define MEM_POOL_SIZE_DIRTY (DIRTY_SIZE(MEM_POOL_SIZE_RO))
|
|
#define MEMORY_POOL_SIZE (MEM_POOL_SIZE_RW+MEM_POOL_SIZE_RO+MEM_POOL_SIZE_DIRTY)
|
|
|
|
/******************************************************************************
|
|
Save States
|
|
******************************************************************************/
|
|
|
|
void CTileGen::SaveState(CBlockFile *SaveState)
|
|
{
|
|
SaveState->NewBlock("Tile Generator", __FILE__);
|
|
SaveState->Write(vram, 0x120000); // Don't write out palette, read-only snapshots or dirty page arrays, just VRAM
|
|
SaveState->Write(regs, sizeof(regs));
|
|
}
|
|
|
|
void CTileGen::LoadState(CBlockFile *SaveState)
|
|
{
|
|
if (OKAY != SaveState->FindBlock("Tile Generator"))
|
|
{
|
|
ErrorLog("Unable to load tile generator state. Save state file is corrupt.");
|
|
return;
|
|
}
|
|
|
|
// Load memory one word at a time
|
|
for (int i = 0; i < 0x120000; i += 4)
|
|
{
|
|
UINT32 data;
|
|
|
|
SaveState->Read(&data, sizeof(data));
|
|
WriteRAM(i, data);
|
|
}
|
|
SaveState->Read(regs, sizeof(regs));
|
|
// If multi-threaded, update read-only snapshots too
|
|
if (g_Config.gpuMultiThreaded)
|
|
UpdateSnapshots(true);
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
Rendering
|
|
******************************************************************************/
|
|
|
|
void CTileGen::BeginVBlank(void)
|
|
{
|
|
/*
|
|
printf("08: %X\n", regs[0x08/4]);
|
|
printf("0C: %X\n", regs[0x0C/4]);
|
|
printf("20: %X\n", regs[0x20/4]);
|
|
printf("40: %X\n", regs[0x40/4]);
|
|
printf("44: %X\n", regs[0x44/4]);
|
|
printf("60: %08X\n", regs[0x60/4]);
|
|
printf("64: %08X\n", regs[0x64/4]);
|
|
printf("68: %08X\n", regs[0x68/4]);
|
|
printf("6C: %08X\n", regs[0x6C/4]);
|
|
*/
|
|
}
|
|
|
|
void CTileGen::EndVBlank(void)
|
|
{
|
|
//
|
|
}
|
|
|
|
UINT32 CTileGen::SyncSnapshots(void)
|
|
{
|
|
if (!g_Config.gpuMultiThreaded)
|
|
return 0;
|
|
|
|
// Update read-only snapshots
|
|
return UpdateSnapshots(false);
|
|
}
|
|
|
|
UINT32 CTileGen::UpdateSnapshot(bool copyWhole, UINT8 *src, UINT8 *dst, unsigned size, UINT8 *dirty)
|
|
{
|
|
unsigned dirtySize = DIRTY_SIZE(size);
|
|
if (copyWhole)
|
|
{
|
|
// If updating whole region, then just copy all data in one go
|
|
memcpy(dst, src, size);
|
|
memset(dirty, 0, dirtySize);
|
|
return size;
|
|
}
|
|
else
|
|
{
|
|
// Otherwise, loop through dirty pages array to find out what needs to be updated and copy only those parts
|
|
UINT32 copied = 0;
|
|
UINT8 *pSrc = src;
|
|
UINT8 *pDst = dst;
|
|
for (unsigned i = 0; i < dirtySize; i++)
|
|
{
|
|
UINT8 d = dirty[i];
|
|
if (d)
|
|
{
|
|
for (unsigned j = 0; j < 8; j++)
|
|
{
|
|
if (d&1)
|
|
{
|
|
// If not at very end of region, then copy an extra 4 bytes to allow for a possible 32-bit overlap
|
|
UINT32 toCopy = (i < dirtySize - 1 || j < 7 ? PAGE_SIZE + 4 : PAGE_SIZE);
|
|
memcpy(pDst, pSrc, toCopy);
|
|
copied += toCopy;
|
|
}
|
|
d >>= 1;
|
|
pSrc += PAGE_SIZE;
|
|
pDst += PAGE_SIZE;
|
|
}
|
|
dirty[i] = 0;
|
|
}
|
|
else
|
|
{
|
|
pSrc += 8 * PAGE_SIZE;
|
|
pDst += 8 * PAGE_SIZE;
|
|
}
|
|
}
|
|
return copied;
|
|
}
|
|
}
|
|
|
|
UINT32 CTileGen::UpdateSnapshots(bool copyWhole)
|
|
{
|
|
// Update all memory region snapshots
|
|
UINT32 palCopied = UpdateSnapshot(copyWhole, (UINT8*)pal, (UINT8*)palRO, 0x020000, palDirty);
|
|
UINT32 vramCopied = UpdateSnapshot(copyWhole, (UINT8*)vram, (UINT8*)vramRO, 0x120000, vramDirty);
|
|
memcpy(regsRO, regs, sizeof(regs)); // Always copy whole of regs buffer
|
|
//printf("TileGen copied - pal:%4uK, vram:%4uK, regs:%uK\n", palCopied / 1024, vramCopied / 1024, sizeof(regs) / 1024);
|
|
return palCopied + vramCopied + sizeof(regs);
|
|
}
|
|
|
|
void CTileGen::BeginFrame(void)
|
|
{
|
|
// NOTE: Render2D->WriteVRAM(addr, data) is no longer being called for RAM addresses that are written
|
|
// to and instead this class relies upon the fact that Render2D currently marks everything as dirty
|
|
// with every frame. If this were to change in the future then code to handle marking the correct
|
|
// parts of the renderer as dirty would need to be added here.
|
|
|
|
Render2D->BeginFrame();
|
|
}
|
|
|
|
void CTileGen::EndFrame(void)
|
|
{
|
|
Render2D->EndFrame();
|
|
}
|
|
|
|
/******************************************************************************
|
|
Emulation Functions
|
|
******************************************************************************/
|
|
|
|
UINT32 CTileGen::ReadRAM(unsigned addr)
|
|
{
|
|
return *(UINT32 *) &vram[addr];
|
|
}
|
|
|
|
void CTileGen::WriteRAM(unsigned addr, UINT32 data)
|
|
{
|
|
if (g_Config.gpuMultiThreaded)
|
|
MARK_DIRTY(vramDirty, addr);
|
|
*(UINT32 *) &vram[addr] = data;
|
|
|
|
// Update palette if required
|
|
if (addr >= 0x100000)
|
|
{
|
|
addr -= 0x100000;
|
|
unsigned color = addr/4; // color index
|
|
if (g_Config.gpuMultiThreaded)
|
|
MARK_DIRTY(palDirty, addr);
|
|
WritePalette(color, data);
|
|
}
|
|
}
|
|
|
|
void CTileGen::InitPalette(void)
|
|
{
|
|
for (int i = 0; i < 0x20000/4; i++)
|
|
{
|
|
WritePalette(i, vram[0x100000/4 + i]);
|
|
if (g_Config.gpuMultiThreaded)
|
|
palRO[i] = pal[i];
|
|
}
|
|
}
|
|
|
|
void CTileGen::WritePalette(unsigned color, UINT32 data)
|
|
{
|
|
UINT8 r, g, b, a;
|
|
|
|
a = 0xFF * ((data>>15)&1); // decode the RGBA (make alpha 0xFF or 0x00)
|
|
a = ~a; // invert it (set on Model 3 means clear pixel)
|
|
|
|
if ((data&0x8000))
|
|
r = g = b = 0;
|
|
else
|
|
{
|
|
b = (data>>7)&0xF8;
|
|
g = (data>>2)&0xF8;
|
|
r = (data<<3)&0xF8;
|
|
}
|
|
|
|
pal[color] = (a<<24)|(b<<16)|(g<<8)|r;
|
|
}
|
|
|
|
void CTileGen::WriteRegister(unsigned reg, UINT32 data)
|
|
{
|
|
reg &= 0xFF;
|
|
regs[reg/4] = data;
|
|
|
|
switch (reg)
|
|
{
|
|
case 0x10: // IRQ acknowledge
|
|
IRQ->Deassert(data&0xFF);
|
|
break;
|
|
case 0x60:
|
|
break;
|
|
case 0x64:
|
|
break;
|
|
case 0x68:
|
|
break;
|
|
case 0x6C:
|
|
break;
|
|
default:
|
|
DebugLog("Tile Generator reg %02X = %08X\n", reg, data);
|
|
//printf("%02X = %08X\n", reg, data);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void CTileGen::Reset(void)
|
|
{
|
|
unsigned memSize = (g_Config.gpuMultiThreaded ? MEMORY_POOL_SIZE : MEM_POOL_SIZE_RW);
|
|
memset(memoryPool, 0, memSize);
|
|
memset(regs, 0, sizeof(regs));
|
|
memset(regsRO, 0, sizeof(regsRO));
|
|
|
|
InitPalette();
|
|
|
|
DebugLog("Tile Generator reset\n");
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
Configuration, Initialization, and Shutdown
|
|
******************************************************************************/
|
|
|
|
void CTileGen::AttachRenderer(CRender2D *Render2DPtr)
|
|
{
|
|
Render2D = Render2DPtr;
|
|
|
|
// If multi-threaded, attach read-only snapshots to renderer instead of real ones
|
|
if (g_Config.gpuMultiThreaded)
|
|
{
|
|
Render2D->AttachVRAM(vramRO);
|
|
Render2D->AttachPalette(palRO);
|
|
Render2D->AttachRegisters(regsRO);
|
|
}
|
|
else
|
|
{
|
|
Render2D->AttachVRAM(vram);
|
|
Render2D->AttachPalette(pal);
|
|
Render2D->AttachRegisters(regs);
|
|
}
|
|
|
|
DebugLog("Tile Generator attached a Render2D object\n");
|
|
}
|
|
|
|
|
|
bool CTileGen::Init(CIRQ *IRQObjectPtr)
|
|
{
|
|
unsigned memSize = (g_Config.gpuMultiThreaded ? MEMORY_POOL_SIZE : MEM_POOL_SIZE_RW);
|
|
float memSizeMB = (float)memSize/(float)0x100000;
|
|
|
|
// Allocate all memory for all TileGen RAM regions
|
|
memoryPool = new(std::nothrow) UINT8[memSize];
|
|
if (NULL == memoryPool)
|
|
return ErrorLog("Insufficient memory for tile generator object (needs %1.1f MB).", memSizeMB);
|
|
|
|
// Set up main pointers
|
|
vram = (UINT8 *) &memoryPool[OFFSET_VRAM];
|
|
pal = (UINT32 *) &memoryPool[OFFSET_PAL];
|
|
|
|
// If multi-threaded, set up pointers for read-only snapshots and dirty page arrays too
|
|
if (g_Config.gpuMultiThreaded)
|
|
{
|
|
vramRO = (UINT8 *) &memoryPool[OFFSET_VRAM_RO];
|
|
palRO = (UINT32 *) &memoryPool[OFFSET_PAL_RO];
|
|
vramDirty = (UINT8 *) &memoryPool[OFFSET_VRAM_DIRTY];
|
|
palDirty = (UINT8 *) &memoryPool[OFFSET_PAL_DIRTY];
|
|
}
|
|
|
|
// Hook up the IRQ controller
|
|
IRQ = IRQObjectPtr;
|
|
|
|
DebugLog("Initialized Tile Generator (allocated %1.1f MB and connected to IRQ controller)\n", memSizeMB);
|
|
return OKAY;
|
|
}
|
|
|
|
CTileGen::CTileGen(void)
|
|
{
|
|
IRQ = NULL;
|
|
memoryPool = NULL;
|
|
DebugLog("Built Tile Generator\n");
|
|
}
|
|
|
|
CTileGen::~CTileGen(void)
|
|
{
|
|
// Dump tile generator RAM
|
|
#if 0
|
|
FILE *fp;
|
|
fp = fopen("tileram", "wb");
|
|
if (NULL != fp)
|
|
{
|
|
fwrite(memoryPool, sizeof(UINT8), 0x120000, fp);
|
|
fclose(fp);
|
|
printf("dumped %s\n", "tileram");
|
|
}
|
|
else
|
|
printf("unable to dump %s\n", "tileram");
|
|
#endif
|
|
|
|
IRQ = NULL;
|
|
if (memoryPool != NULL)
|
|
{
|
|
delete [] memoryPool;
|
|
memoryPool = NULL;
|
|
}
|
|
DebugLog("Destroyed Tile Generator\n");
|
|
}
|