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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "common/scummsys.h"
#include "backends/platform/psp/psppixelformat.h"
//#define __PSP_DEBUG_FUNCS__ /* For debugging function calls */
//#define __PSP_DEBUG_PRINT__ /* For debug printouts */
#include "backends/platform/psp/trace.h"
// class PSPPixelFormat --------------------------------------
void PSPPixelFormat::set(Type type, bool swap /* = false */) {
DEBUG_ENTER_FUNC();
PSP_DEBUG_PRINT("type = %d\n", type);
format = type;
swapRB = swap;
switch (type) {
case Type_4444:
case Type_5551:
case Type_5650:
bitsPerPixel = 16;
break;
case Type_8888:
bitsPerPixel = 32;
break;
case Type_Palette_8bit:
bitsPerPixel = 8;
break;
case Type_Palette_4bit:
bitsPerPixel = 4;
break;
case Type_None:
bitsPerPixel = 0;
break;
default: // This is an error, but let's continue anyway
PSP_ERROR("Unhandled value of pixel type[%d]\n", type);
bitsPerPixel = 16;
break;
}
PSP_DEBUG_PRINT("bitsPerPixel[%u]\n", bitsPerPixel);
}
// Convert from ScummVM general PixelFormat to our pixel format
// For buffer and palette.
void PSPPixelFormat::convertFromScummvmPixelFormat(const Graphics::PixelFormat *pf,
PSPPixelFormat::Type &bufferType,
PSPPixelFormat::Type &paletteType,
bool &swapRedBlue) {
swapRedBlue = false; // no red-blue swap by default
PSPPixelFormat::Type *target = 0; // which one we'll be filling
if (!pf) { // Default, pf is NULL
bufferType = Type_Palette_8bit;
paletteType = Type_5551;
} else { // We have a pf
if (pf->bytesPerPixel == 1) {
bufferType = Type_Palette_8bit;
target = &paletteType; // The type describes the palette
} else if (pf->bytesPerPixel == 2) {
paletteType = Type_None;
target = &bufferType; // The type describes the buffer
} else {
PSP_ERROR("Unknown bpp[%u] in pixeltype. Reverting to 8bpp\n", pf->bytesPerPixel);
bufferType = Type_Palette_8bit;
target = &paletteType; // The type describes the palette
}
// Find out the exact type of the target
if (pf->rLoss == 3 && pf->bLoss == 3) {
if (pf->gLoss == 3)
*target = Type_5551;
else
*target = Type_5650;
} else if (pf->rLoss == 4 && pf->gLoss == 4 && pf->bLoss == 4) {
*target = Type_4444;
} else if (pf->gLoss == 0 && pf->gShift == 8) {
*target = Type_8888;
} else if ((pf->gLoss == 0 && pf->gShift == 0) ||
(pf->gLoss == 8 && pf->gShift == 0)) { // Default CLUT8 can have weird values
*target = Type_5551;
} else {
PSP_ERROR("Unknown Scummvm pixel format.\n");
PSP_ERROR("\trLoss[%d], gLoss[%d], bLoss[%d], aLoss[%d]\n\trShift[%d], gShift[%d], bShift[%d], aShift[%d]\n",
pf->rLoss, pf->gLoss, pf->bLoss, pf->aLoss,
pf->rShift, pf->gShift, pf->bShift, pf->aShift);
*target = Type_Unknown;
}
if (pf->rShift != 0) {// We allow backend swap of red and blue
swapRedBlue = true;
PSP_DEBUG_PRINT("detected red/blue swap\n");
}
}
}
Graphics::PixelFormat PSPPixelFormat::convertToScummvmPixelFormat(PSPPixelFormat::Type type) {
Graphics::PixelFormat pf;
switch (type) {
case Type_4444:
pf.bytesPerPixel = 2;
pf.aLoss = 4;
pf.rLoss = 4;
pf.gLoss = 4;
pf.bLoss = 4;
pf.aShift = 12;
pf.rShift = 0;
pf.gShift = 4;
pf.bShift = 8;
break;
case Type_5551:
pf.bytesPerPixel = 2;
pf.aLoss = 7;
pf.rLoss = 3;
pf.gLoss = 3;
pf.bLoss = 3;
pf.aShift = 15;
pf.rShift = 0;
pf.gShift = 5;
pf.bShift = 10;
break;
case Type_5650:
pf.bytesPerPixel = 2;
pf.aLoss = 8;
pf.rLoss = 3;
pf.gLoss = 2;
pf.bLoss = 3;
pf.aShift = 0;
pf.rShift = 0;
pf.gShift = 5;
pf.bShift = 11;
break;
case Type_8888:
pf.bytesPerPixel = 4;
pf.aLoss = 0;
pf.rLoss = 0;
pf.gLoss = 0;
pf.bLoss = 0;
pf.aShift = 24;
pf.rShift = 0;
pf.gShift = 8;
pf.bShift = 16;
break;
default:
PSP_ERROR("Unhandled PSPPixelFormat[%u]\n", type);
break;
}
return pf;
}
uint32 PSPPixelFormat::convertTo32BitColor(uint32 color) const {
DEBUG_ENTER_FUNC();
uint32 r, g, b, a, output;
colorToRgba(color, r, g, b, a);
output = ((b << 16) | (g << 8) | (r << 0) | (a << 24));
PSP_DEBUG_PRINT_FUNC("input color[%x], output[%x]\n", color, output);
return output;
}
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