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Diffstat (limited to 'SrcShared/Hardware/EmRegsFrameBuffer.cpp')
| -rw-r--r-- | SrcShared/Hardware/EmRegsFrameBuffer.cpp | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/SrcShared/Hardware/EmRegsFrameBuffer.cpp b/SrcShared/Hardware/EmRegsFrameBuffer.cpp new file mode 100644 index 0000000..cb436fd --- /dev/null +++ b/SrcShared/Hardware/EmRegsFrameBuffer.cpp @@ -0,0 +1,241 @@ +/* -*- mode: C++; tab-width: 4 -*- */ +/* ===================================================================== *\ + Copyright (c) 2000-2001 Palm, Inc. or its subsidiaries. + All rights reserved. + + This file is part of the Palm OS Emulator. + + This program 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 2 of the License, or + (at your option) any later version. +\* ===================================================================== */ + +#include "EmCommon.h" +#include "EmRegsFrameBuffer.h" + +#include "Byteswapping.h" // ByteswapWords +#include "EmMemory.h" // EmMemDoGet32 +#include "EmScreen.h" // EmScreen::MarkDirty +#include "Miscellaneous.h" // StWordSwapper +#include "Platform.h" // Platform::AllocateMemoryClear +#include "SessionFile.h" // SessionFile + + +// --------------------------------------------------------------------------- +// ¥ EmRegsFrameBuffer::EmRegsFrameBuffer +// --------------------------------------------------------------------------- + +EmRegsFrameBuffer::EmRegsFrameBuffer (emuptr baseAddr, int32 size) : + fBaseAddr (baseAddr), + fSize (size), + fVideoMem (NULL) +{ +} + + +// --------------------------------------------------------------------------- +// ¥ EmRegsFrameBuffer::~EmRegsFrameBuffer +// --------------------------------------------------------------------------- + +EmRegsFrameBuffer::~EmRegsFrameBuffer (void) +{ +} + + +// --------------------------------------------------------------------------- +// ¥ EmRegsFrameBuffer::Initialize +// --------------------------------------------------------------------------- + +void EmRegsFrameBuffer::Initialize (void) +{ + EmRegs::Initialize (); + + // Allocate a chunk of memory for the VRAM space. + + if (!fVideoMem) + { + fVideoMem = Platform::AllocateMemoryClear (fSize); + } +} + + +// --------------------------------------------------------------------------- +// ¥ EmRegsFrameBuffer::Reset +// --------------------------------------------------------------------------- + +void EmRegsFrameBuffer::Reset (Bool hardwareReset) +{ + EmRegs::Reset (hardwareReset); +} + + +// --------------------------------------------------------------------------- +// ¥ EmRegsFrameBuffer::Save +// --------------------------------------------------------------------------- + +void EmRegsFrameBuffer::Save (SessionFile& f) +{ + EmRegs::Save (f); + + StWordSwapper swapper (fVideoMem, fSize); + f.WriteSED1375Image (fVideoMem, fSize); +} + + +// --------------------------------------------------------------------------- +// ¥ EmRegsFrameBuffer::Load +// --------------------------------------------------------------------------- + +void EmRegsFrameBuffer::Load (SessionFile& f) +{ + EmRegs::Load (f); + + // Read in the LCD image, and then byteswap it. + + if (f.ReadSED1375Image (fVideoMem)) + { + ByteswapWords (fVideoMem, fSize); + } + else + { + f.SetCanReload (false); + } + +} + + +// --------------------------------------------------------------------------- +// ¥ EmRegsFrameBuffer::Dispose +// --------------------------------------------------------------------------- + +void EmRegsFrameBuffer::Dispose (void) +{ + EmRegs::Dispose (); + + Platform::DisposeMemory (fVideoMem); +} + + +// --------------------------------------------------------------------------- +// ¥ EmRegsFrameBuffer::GetLong +// --------------------------------------------------------------------------- + +uint32 EmRegsFrameBuffer::GetLong (emuptr address) +{ + uint32 offset = address - fBaseAddr; + return EmMemDoGet32 (((uint8*) fVideoMem) + offset); +} + + +// --------------------------------------------------------------------------- +// ¥ EmRegsFrameBuffer::GetWord +// --------------------------------------------------------------------------- + +uint32 EmRegsFrameBuffer::GetWord (emuptr address) +{ + uint32 offset = address - fBaseAddr; + return EmMemDoGet16 (((uint8*) fVideoMem) + offset); +} + + +// --------------------------------------------------------------------------- +// ¥ EmRegsFrameBuffer::GetByte +// --------------------------------------------------------------------------- + +uint32 EmRegsFrameBuffer::GetByte (emuptr address) +{ + uint32 offset = address - fBaseAddr; + return EmMemDoGet8 (((uint8*) fVideoMem) + offset); +} + + +// --------------------------------------------------------------------------- +// ¥ EmRegsFrameBuffer::SetLong +// --------------------------------------------------------------------------- + +void EmRegsFrameBuffer::SetLong (emuptr address, uint32 value) +{ + uint32 offset = address - fBaseAddr; + EmMemDoPut32 (((uint8*) fVideoMem) + offset, value); + EmScreen::MarkDirty (address, 4); +} + + +// --------------------------------------------------------------------------- +// ¥ EmRegsFrameBuffer::SetWord +// --------------------------------------------------------------------------- + +void EmRegsFrameBuffer::SetWord (emuptr address, uint32 value) +{ + uint32 offset = address - fBaseAddr; + EmMemDoPut16 (((uint8*) fVideoMem) + offset, value); + EmScreen::MarkDirty (address, 2); +} + + +// --------------------------------------------------------------------------- +// ¥ EmRegsFrameBuffer::SetByte +// --------------------------------------------------------------------------- + +void EmRegsFrameBuffer::SetByte (emuptr address, uint32 value) +{ + uint32 offset = address - fBaseAddr; + EmMemDoPut8 (((uint8*) fVideoMem) + offset, value); + EmScreen::MarkDirty (address, 1); +} + + +// --------------------------------------------------------------------------- +// ¥ EmRegsFrameBuffer::ValidAddress +// --------------------------------------------------------------------------- + +int EmRegsFrameBuffer::ValidAddress (emuptr address, uint32 size) +{ + UNUSED_PARAM (address); + UNUSED_PARAM (size); + + return true; +} + + +// --------------------------------------------------------------------------- +// ¥ EmRegsFrameBuffer::SetSubBankHandlers +// --------------------------------------------------------------------------- + +void EmRegsFrameBuffer::SetSubBankHandlers (void) +{ + // We don't have handlers for each byte of memory, so there's nothing + // to install here. +} + + +// --------------------------------------------------------------------------- +// ¥ EmRegsFrameBuffer::GetRealAddress +// --------------------------------------------------------------------------- + +uint8* EmRegsFrameBuffer::GetRealAddress (emuptr address) +{ + uint32 offset = address - fBaseAddr; + return (uint8*) fVideoMem + offset; +} + + +// --------------------------------------------------------------------------- +// ¥ EmRegsFrameBuffer::GetAddressStart +// --------------------------------------------------------------------------- + +emuptr EmRegsFrameBuffer::GetAddressStart (void) +{ + return fBaseAddr; +} + + +// --------------------------------------------------------------------------- +// ¥ EmRegsFrameBuffer::GetAddressRange +// --------------------------------------------------------------------------- + +uint32 EmRegsFrameBuffer::GetAddressRange (void) +{ + return fSize; +} |