05f0ebf262
PspMemorySwap is more specific ie. it only needs to be known by PSP files. It could be put in another file, but not worth the effort. svn-id: r52816
100 lines
3.4 KiB
C++
100 lines
3.4 KiB
C++
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/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL: https://scummvm.svn.sourceforge.net/svnroot/scummvm/scummvm/trunk/backends/platform/psp/osys_psp.cpp $
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* $Id: osys_psp.cpp 46126 2009-11-24 14:18:46Z fingolfin $
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*
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*/
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#ifndef PSP_MEMORY_H
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#define PSP_MEMORY_H
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#define MIN_AMOUNT_FOR_COMPLEX_COPY 8
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#define MIN_AMOUNT_FOR_MISALIGNED_COPY 8
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//#define __PSP_DEBUG_PRINT__
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#include "backends/platform/psp/trace.h"
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/**
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* Class that does memory copying and swapping if needed
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*/
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class PspMemory {
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private:
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static void testCopy(const byte *debugDst, const byte *debugSrc, uint32 debugBytes);
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static void copy(byte *dst, const byte *src, uint32 bytes);
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static void copy32Aligned(uint32 *dst32, const uint32 *src32, uint32 bytes);
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static void copy32Misaligned(uint32 *dst32, const byte *src, uint32 bytes, uint32 alignSrc);
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static inline void copy8(byte *dst, const byte *src, int32 bytes) {
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//PSP_DEBUG_PRINT("copy8 called with dst[%p], src[%p], bytes[%d]\n", dst, src, bytes);
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for (;bytes; bytes--) {
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*dst++ = *src++;
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}
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}
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public:
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// This is the interface to the outside world
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static void fastCopy(byte *dst, const byte *src, uint32 bytes) {
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if (bytes < MIN_AMOUNT_FOR_COMPLEX_COPY) {
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copy8(dst, src, bytes);
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} else { // go to more powerful copy
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copy(dst, src, bytes);
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}
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}
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};
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#endif /* PSP_MEMORY_H */
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#if defined(PSP_INCLUDE_SWAP) && !defined(PSP_MEMORY_SWAP_H)
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#define PSP_MEMORY_SWAP_H
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//#include "backends/platform/psp/psppixelformat.h"
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class PspMemorySwap {
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private:
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static void testSwap(const uint16 *debugDst, const uint16 *debugSrc, uint32 debugBytes, PSPPixelFormat &format);
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static void swap(uint16 *dst16, const uint16 *src16, uint32 bytes, PSPPixelFormat &format);
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static void swap32Aligned(uint32 *dst32, const uint32 *src32, uint32 bytes, PSPPixelFormat &format);
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static void swap32Misaligned(uint32 *dst32, const uint16 *src16, uint32 bytes, PSPPixelFormat &format);
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// For swapping, we know that we have multiples of 16 bits
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static void swap16(uint16 *dst16, const uint16 *src16, uint32 bytes, PSPPixelFormat &format) {
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PSP_DEBUG_PRINT("swap16 called with dst16[%p], src16[%p], bytes[%d]\n", dst16, src16, bytes);
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uint32 shorts = bytes >> 1;
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while (shorts--) {
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*dst16++ = format.swapRedBlue16(*src16++);
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}
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}
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public:
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static void fastSwap(byte *dst, const byte *src, uint32 bytes, PSPPixelFormat &format) {
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if (bytes < MIN_AMOUNT_FOR_COMPLEX_COPY * 2) {
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swap16((uint16 *)dst, (uint16 *)src, bytes, format);
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} else { // go to more powerful copy
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swap((uint16 *)dst, (uint16 *)src, bytes, format);
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}
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}
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};
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#endif /* PSP_INCLUDE_SWAP */
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