mirror of
https://github.com/RetroDECK/Supermodel.git
synced 2024-11-22 13:55:38 +00:00
295 lines
8.3 KiB
C++
295 lines
8.3 KiB
C++
/**
|
|
** Supermodel
|
|
** A Sega Model 3 Arcade Emulator.
|
|
** Copyright 2011-2012 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.h
|
|
*
|
|
* Header file defining the CTileGen (tile generator device) class.
|
|
*/
|
|
|
|
#ifndef INCLUDED_TILEGEN_H
|
|
#define INCLUDED_TILEGEN_H
|
|
|
|
#include "IRQ.h"
|
|
#include "Graphics/Render2D.h"
|
|
|
|
/*
|
|
* CTileGen:
|
|
*
|
|
* Tile generator device. The Model 3's tile generator handles not only the 2D
|
|
* tile map layers but also seems to control video output and VBL IRQs.
|
|
*/
|
|
class CTileGen
|
|
{
|
|
public:
|
|
/*
|
|
* SaveState(SaveState):
|
|
*
|
|
* Saves an image of the current device state.
|
|
*
|
|
* Parameters:
|
|
* SaveState Block file to save state information to.
|
|
*/
|
|
void SaveState(CBlockFile *SaveState);
|
|
|
|
/*
|
|
* LoadState(SaveState):
|
|
*
|
|
* Loads and a state image.
|
|
*
|
|
* Parameters:
|
|
* SaveState Block file to load state information from.
|
|
*/
|
|
void LoadState(CBlockFile *SaveState);
|
|
|
|
/*
|
|
* BeginVBlank(void):
|
|
*
|
|
* Must be called before the VBlank starts.
|
|
*/
|
|
void BeginVBlank(void);
|
|
|
|
/*
|
|
* EndVBlank(void)
|
|
*
|
|
* Must be called after the VBlank finishes.
|
|
*/
|
|
void EndVBlank(void);
|
|
|
|
/*
|
|
* SyncSnapshots(void):
|
|
*
|
|
* Syncs the read-only memory snapshots with the real ones so that rendering
|
|
* of the current frame can begin in the render thread. Must be called at the
|
|
* end of each frame when both the render thread and the PPC thread have finished
|
|
* their work. If multi-threaded rendering is not enabled, then this method does
|
|
* nothing.
|
|
*/
|
|
UINT32 SyncSnapshots(void);
|
|
|
|
/*
|
|
* BeginFrame(void):
|
|
*
|
|
* Prepares to render a new frame. Must be called once per frame prior to
|
|
* drawing anything and must only access read-only snapshots and variables
|
|
* since it may be running in a separate thread.
|
|
*
|
|
* Invokes the underlying 2D renderer.
|
|
*/
|
|
void BeginFrame(void);
|
|
|
|
/*
|
|
* PreRenderFrame(void):
|
|
*
|
|
* Draws the all top layers (above 3D graphics) and bottom layers (below 3D
|
|
* graphics) but does not yet display them. May send data to the GPU.
|
|
*
|
|
* Invokes the equivalent method in the underlying 2D renderer.
|
|
*/
|
|
void PreRenderFrame(void);
|
|
|
|
/*
|
|
* RenderFrameBottom(void):
|
|
*
|
|
* Overwrites the color buffer with bottom surface that was pre-rendered by
|
|
* the last call to PreRenderFrame().
|
|
*
|
|
* Invokes the equivalent method in the underlying 2D renderer.
|
|
*/
|
|
void RenderFrameBottom(void);
|
|
|
|
/*
|
|
* RenderFrameTop(void):
|
|
*
|
|
* Draws the top surface (if it exists) that was pre-rendered by the last
|
|
* call to PreRenderFrame(). Previously drawn graphics layers will be visible
|
|
* through transparent regions.
|
|
*
|
|
* Invokes the equivalent method in the underlying 2D renderer.
|
|
*/
|
|
void RenderFrameTop(void);
|
|
|
|
/*
|
|
* EndFrame(void):
|
|
*
|
|
* Signals the end of rendering for this frame. Must be called last during
|
|
* the frame and must only access read-only snapshots and variables since it
|
|
* may be running in a separate thread.
|
|
*
|
|
* Invokes the equivalent method in the underlying 2D renderer.
|
|
*/
|
|
void EndFrame(void);
|
|
|
|
/*
|
|
* ReadRAM8(addr):
|
|
* ReadRAM16(addr):
|
|
* ReadRAM32(addr):
|
|
*
|
|
* Reads the tile generator's little endian RAM (the word is returned with
|
|
* the MSB read from addr+3). If a big endian device is reading (PowerPC),
|
|
* the result must be manually adjusted.
|
|
*
|
|
* Parameters:
|
|
* addr Address in tile generator RAM. Caller must ensure it is
|
|
* clamped to the range 0x000000 to 0x11FFFF because this
|
|
* function does not.
|
|
*
|
|
* Returns:
|
|
* Data from the RAM address.
|
|
*/
|
|
uint8_t ReadRAM8(unsigned addr);
|
|
uint16_t ReadRAM16(unsigned addr);
|
|
uint32_t ReadRAM32(unsigned addr);
|
|
|
|
/*
|
|
* WriteRAM8(addr, data):
|
|
* WriteRAM16(addr, data):
|
|
* WriteRAM32(addr, data):
|
|
*
|
|
* Writes to the tile generator's little endian RAM (the word's MSB is
|
|
* written to addr+3). If a big endian device is writing, the address and
|
|
* data must be adjusted manually before passing it to this function.
|
|
*
|
|
* Parameters:
|
|
* addr Address in tile generator RAM. Caller must ensure it is
|
|
* clamped to the range 0x000000 to 0x11FFFF because this
|
|
* function does not.
|
|
* data The data to write.
|
|
*/
|
|
void WriteRAM8(unsigned addr, uint8_t data);
|
|
void WriteRAM16(unsigned addr, uint16_t data);
|
|
void WriteRAM32(unsigned addr, uint32_t data);
|
|
|
|
/*
|
|
* ReadRegister(reg):
|
|
*
|
|
* Reads 32 bits of data from a (little endian) register. If a big endian
|
|
* device is reading, the word must be flipped.
|
|
*
|
|
* Parameters:
|
|
* reg Aligned (32 bits) register offset (0x00-0xFC).
|
|
*
|
|
* Returns:
|
|
* Data read as little endian from the register.
|
|
*/
|
|
UINT32 ReadRegister(unsigned reg);
|
|
|
|
/*
|
|
* WriteRegister(reg, data):
|
|
*
|
|
* Writes 32 bits of data to a (little endian) register. If a big endian
|
|
* device is writing, the word must be flipped.
|
|
*
|
|
* Parameters:
|
|
* reg Aligned (32 bits) register offset (0x00-0xFC).
|
|
* data Data to write.
|
|
*/
|
|
void WriteRegister(unsigned reg, UINT32 data);
|
|
|
|
/*
|
|
* Reset(void):
|
|
*
|
|
* Resets the device.
|
|
*/
|
|
void Reset(void);
|
|
|
|
/*
|
|
* AttachRenderer(render2DPtr):
|
|
*
|
|
* Attaches a 2D renderer for the tile generator to use. This function will
|
|
* immediately pass along the information that a CRender2D object needs to
|
|
* work with.
|
|
*
|
|
* Parameters:
|
|
* Render2DPtr Pointer to a 2D renderer object.
|
|
*/
|
|
void AttachRenderer(CRender2D *Render2DPtr);
|
|
|
|
/*
|
|
* Init(IRQObjectPtr):
|
|
*
|
|
* One-time initialization of the context. Must be called prior to all
|
|
* other members. Links the tile generator to an IRQ controller and
|
|
* allocates memory for tile generator RAM.
|
|
*
|
|
* Parameters:
|
|
* IRQObjectPtr Pointer to the IRQ controller object.
|
|
*
|
|
* Returns:
|
|
* OKAY is successful, otherwise FAILED if a non-recoverable error
|
|
* occurred. Prints own error messages.
|
|
*/
|
|
bool Init(CIRQ *IRQObjectPtr);
|
|
|
|
/*
|
|
* CTileGen(config):
|
|
* ~CTileGen(void):
|
|
*
|
|
* Constructor and destructor.
|
|
*
|
|
* Paramters:
|
|
* config Run-time configuration. The reference should be held because
|
|
* this changes at run-time.
|
|
*/
|
|
CTileGen(const Util::Config::Node &config);
|
|
~CTileGen(void);
|
|
|
|
private:
|
|
// Private member functions
|
|
void RecomputePalettes(void);
|
|
void InitPalette(void);
|
|
void WritePalette(unsigned color, UINT32 data);
|
|
UINT32 UpdateSnapshots(bool copyWhole);
|
|
UINT32 UpdateSnapshot(bool copyWhole, UINT8 *src, UINT8 *dst, unsigned size, UINT8 *dirty);
|
|
|
|
const Util::Config::Node &m_config;
|
|
const bool m_gpuMultiThreaded;
|
|
|
|
CIRQ *IRQ; // IRQ controller the tile generator is attached to
|
|
CRender2D *Render2D; // 2D renderer the tile generator is attached to
|
|
|
|
/*
|
|
* Tile generator VRAM. The upper 128KB of VRAM stores the palette data.
|
|
* Two palettes are computed from this based on the color offset registers:
|
|
* A/A' and B/B'.
|
|
*/
|
|
UINT8 *memoryPool; // all memory allocated here
|
|
UINT8 *vram; // 1.125MB of VRAM
|
|
UINT32 *pal[2]; // 2 x 0x20000 byte (32K colors) palette
|
|
bool recomputePalettes; // whether to recompute palettes A/A' and B/B' during sync
|
|
|
|
// Read-only snapshots
|
|
UINT8 *vramRO; // 1.125MB of VRAM [read-only snapshot]
|
|
UINT32 *palRO[2]; // 2 x 0x20000 byte (32K colors) palette [read-only snapshot]
|
|
|
|
// Arrays to keep track of dirty pages in memory regions
|
|
UINT8 *vramDirty;
|
|
UINT8 *palDirty[2]; // one for each palette
|
|
|
|
// Registers
|
|
UINT32 regs[64];
|
|
UINT32 regsRO[64]; // Read-only copy of registers
|
|
|
|
};
|
|
|
|
|
|
#endif // INCLUDED_TILEGEN_H
|