scummvm/graphics/scaler/normal.cpp

317 lines
8.6 KiB
C++

/* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "graphics/scaler/normal.h"
#ifdef USE_SCALERS
/**
* Trivial nearest-neighbor 2x scaler.
*/
template<typename Pixel>
void Normal2x(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
int width, int height) {
uint8 *r;
const int b = sizeof(Pixel);
assert(IS_ALIGNED(dstPtr, 2));
while (height--) {
r = dstPtr;
for (int i = 0; i < width; ++i, r += b * 2) {
Pixel color = *(((const Pixel*)srcPtr) + i);
*(Pixel *)(r) = color;
*(Pixel *)(r + b) = color;
*(Pixel *)(r + dstPitch) = color;
*(Pixel *)(r + b + dstPitch) = color;
}
srcPtr += srcPitch;
dstPtr += dstPitch << 1;
}
}
#ifdef USE_ARM_SCALER_ASM
extern "C" void Normal2xARM(const uint8 *srcPtr,
uint32 srcPitch,
uint8 *dstPtr,
uint32 dstPitch,
int width,
int height);
#else
/**
* Template Specialization that writes 2 pixels at a time.
*/
template<>
void Normal2x<uint16>(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
int width, int height) {
uint8 *r;
assert(IS_ALIGNED(dstPtr, 4));
while (height--) {
r = dstPtr;
for (int i = 0; i < width; ++i, r += 4) {
uint32 color = *(((const uint16*)srcPtr) + i);
color |= color << 16;
*(uint32 *)(r) = color;
*(uint32 *)(r + dstPitch) = color;
}
srcPtr += srcPitch;
dstPtr += dstPitch << 1;
}
}
#endif
/**
* Trivial nearest-neighbor 3x scaler.
*/
template<typename Pixel>
void Normal3x(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
int width, int height) {
uint8 *r;
const uint32 dstPitch2 = dstPitch * 2;
const uint32 dstPitch3 = dstPitch * 3;
const int b = sizeof(Pixel);
assert(IS_ALIGNED(dstPtr, 2));
while (height--) {
r = dstPtr;
for (int i = 0; i < width; ++i, r += b * 3) {
Pixel color = *(((const Pixel *)srcPtr) + i);
*(Pixel *)(r + b * 0) = color;
*(Pixel *)(r + b * 1) = color;
*(Pixel *)(r + b * 2) = color;
*(Pixel *)(r + b * 0 + dstPitch) = color;
*(Pixel *)(r + b * 1 + dstPitch) = color;
*(Pixel *)(r + b * 2 + dstPitch) = color;
*(Pixel *)(r + b * 0 + dstPitch2) = color;
*(Pixel *)(r + b * 1 + dstPitch2) = color;
*(Pixel *)(r + b * 2 + dstPitch2) = color;
}
srcPtr += srcPitch;
dstPtr += dstPitch3;
}
}
/**
* Trivial nearest-neighbor 4x scaler.
*/
template<typename Pixel>
void Normal4x(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
int width, int height) {
uint8 *r;
const uint32 dstPitch2 = dstPitch * 2;
const uint32 dstPitch3 = dstPitch * 3;
const uint32 dstPitch4 = dstPitch * 4;
const int b = sizeof(Pixel);
assert(IS_ALIGNED(dstPtr, 2));
while (height--) {
r = dstPtr;
for (int i = 0; i < width; ++i, r += b * 4) {
Pixel color = *(((const Pixel *)srcPtr) + i);
*(Pixel *)(r + b * 0) = color;
*(Pixel *)(r + b * 1) = color;
*(Pixel *)(r + b * 2) = color;
*(Pixel *)(r + b * 3) = color;
*(Pixel *)(r + b * 0 + dstPitch) = color;
*(Pixel *)(r + b * 1 + dstPitch) = color;
*(Pixel *)(r + b * 2 + dstPitch) = color;
*(Pixel *)(r + b * 3 + dstPitch) = color;
*(Pixel *)(r + b * 0 + dstPitch2) = color;
*(Pixel *)(r + b * 1 + dstPitch2) = color;
*(Pixel *)(r + b * 2 + dstPitch2) = color;
*(Pixel *)(r + b * 3 + dstPitch2) = color;
*(Pixel *)(r + b * 0 + dstPitch3) = color;
*(Pixel *)(r + b * 1 + dstPitch3) = color;
*(Pixel *)(r + b * 2 + dstPitch3) = color;
*(Pixel *)(r + b * 3 + dstPitch3) = color;
}
srcPtr += srcPitch;
dstPtr += dstPitch4;
}
}
/**
* Trivial nearest-neighbor 5x scaler.
*/
template<typename Pixel>
void Normal5x(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
int width, int height) {
uint8 *r;
const uint32 dstPitch2 = dstPitch * 2;
const uint32 dstPitch3 = dstPitch * 3;
const uint32 dstPitch4 = dstPitch * 4;
const uint32 dstPitch5 = dstPitch * 5;
const int b = sizeof(Pixel);
assert(IS_ALIGNED(dstPtr, 2));
while (height--) {
r = dstPtr;
for (int i = 0; i < width; ++i, r += b * 5) {
Pixel color = *(((const Pixel *)srcPtr) + i);
*(Pixel *)(r + b * 0) = color;
*(Pixel *)(r + b * 1) = color;
*(Pixel *)(r + b * 2) = color;
*(Pixel *)(r + b * 3) = color;
*(Pixel *)(r + b * 4) = color;
*(Pixel *)(r + b * 0 + dstPitch) = color;
*(Pixel *)(r + b * 1 + dstPitch) = color;
*(Pixel *)(r + b * 2 + dstPitch) = color;
*(Pixel *)(r + b * 3 + dstPitch) = color;
*(Pixel *)(r + b * 4 + dstPitch) = color;
*(Pixel *)(r + b * 0 + dstPitch2) = color;
*(Pixel *)(r + b * 1 + dstPitch2) = color;
*(Pixel *)(r + b * 2 + dstPitch2) = color;
*(Pixel *)(r + b * 3 + dstPitch2) = color;
*(Pixel *)(r + b * 4 + dstPitch2) = color;
*(Pixel *)(r + b * 0 + dstPitch3) = color;
*(Pixel *)(r + b * 1 + dstPitch3) = color;
*(Pixel *)(r + b * 2 + dstPitch3) = color;
*(Pixel *)(r + b * 3 + dstPitch3) = color;
*(Pixel *)(r + b * 4 + dstPitch3) = color;
*(Pixel *)(r + b * 0 + dstPitch4) = color;
*(Pixel *)(r + b * 1 + dstPitch4) = color;
*(Pixel *)(r + b * 2 + dstPitch4) = color;
*(Pixel *)(r + b * 3 + dstPitch4) = color;
*(Pixel *)(r + b * 4 + dstPitch4) = color;
}
srcPtr += srcPitch;
dstPtr += dstPitch5;
}
}
#endif
void NormalScaler::scaleIntern(const uint8 *srcPtr, uint32 srcPitch,
uint8 *dstPtr, uint32 dstPitch, int width, int height, int x, int y) {
#ifdef USE_SCALERS
if (_format.bytesPerPixel == 1) {
switch (_factor) {
case 2:
Normal2x<uint8>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
break;
case 3:
Normal3x<uint8>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
break;
case 4:
Normal4x<uint8>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
break;
case 5:
Normal5x<uint8>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
break;
}
} else if (_format.bytesPerPixel == 2) {
switch (_factor) {
case 2:
#ifdef USE_ARM_SCALER_ASM
Normal2xARM(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
#else
Normal2x<uint16>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
#endif
break;
case 3:
Normal3x<uint16>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
break;
case 4:
Normal4x<uint16>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
break;
case 5:
Normal5x<uint16>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
break;
}
} else {
assert(_format.bytesPerPixel == 4);
switch (_factor) {
case 2:
Normal2x<uint32>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
break;
case 3:
Normal3x<uint32>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
break;
case 4:
Normal4x<uint32>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
break;
case 5:
Normal5x<uint32>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
break;
}
}
#endif
}
uint NormalScaler::increaseFactor() {
#ifdef USE_SCALERS
if (_factor < 5)
setFactor(_factor + 1);
#endif
return _factor;
}
uint NormalScaler::decreaseFactor() {
#ifdef USE_SCALERS
if (_factor > 1)
setFactor(_factor - 1);
#endif
return _factor;
}
class NormalPlugin final : public ScalerPluginObject {
public:
NormalPlugin();
Scaler *createInstance(const Graphics::PixelFormat &format) const override;
bool canDrawCursor() const override { return true; }
uint extraPixels() const override { return 0; }
const char *getName() const override;
const char *getPrettyName() const override;
};
NormalPlugin::NormalPlugin() {
_factors.push_back(1);
#ifdef USE_SCALERS
_factors.push_back(2);
_factors.push_back(3);
_factors.push_back(4);
_factors.push_back(5);
#endif
}
Scaler *NormalPlugin::createInstance(const Graphics::PixelFormat &format) const {
return new NormalScaler(format);
}
const char *NormalPlugin::getName() const {
return "normal";
}
const char *NormalPlugin::getPrettyName() const {
return "Normal";
}
REGISTER_PLUGIN_STATIC(NORMAL, PLUGIN_TYPE_SCALER, NormalPlugin);