mirror of
https://github.com/libretro/scummvm.git
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317 lines
8.6 KiB
C++
317 lines
8.6 KiB
C++
/* 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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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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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*
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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, see <http://www.gnu.org/licenses/>.
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*/
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#include "graphics/scaler/normal.h"
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#ifdef USE_SCALERS
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/**
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* Trivial nearest-neighbor 2x scaler.
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*/
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template<typename Pixel>
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void Normal2x(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
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int width, int height) {
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uint8 *r;
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const int b = sizeof(Pixel);
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assert(IS_ALIGNED(dstPtr, 2));
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while (height--) {
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r = dstPtr;
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for (int i = 0; i < width; ++i, r += b * 2) {
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Pixel color = *(((const Pixel*)srcPtr) + i);
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*(Pixel *)(r) = color;
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*(Pixel *)(r + b) = color;
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*(Pixel *)(r + dstPitch) = color;
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*(Pixel *)(r + b + dstPitch) = color;
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}
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srcPtr += srcPitch;
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dstPtr += dstPitch << 1;
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}
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}
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#ifdef USE_ARM_SCALER_ASM
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extern "C" void Normal2xARM(const uint8 *srcPtr,
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uint32 srcPitch,
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uint8 *dstPtr,
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uint32 dstPitch,
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int width,
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int height);
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#else
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/**
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* Template Specialization that writes 2 pixels at a time.
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*/
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template<>
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void Normal2x<uint16>(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
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int width, int height) {
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uint8 *r;
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assert(IS_ALIGNED(dstPtr, 4));
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while (height--) {
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r = dstPtr;
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for (int i = 0; i < width; ++i, r += 4) {
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uint32 color = *(((const uint16*)srcPtr) + i);
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color |= color << 16;
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*(uint32 *)(r) = color;
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*(uint32 *)(r + dstPitch) = color;
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}
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srcPtr += srcPitch;
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dstPtr += dstPitch << 1;
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}
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}
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#endif
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/**
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* Trivial nearest-neighbor 3x scaler.
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*/
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template<typename Pixel>
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void Normal3x(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
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int width, int height) {
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uint8 *r;
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const uint32 dstPitch2 = dstPitch * 2;
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const uint32 dstPitch3 = dstPitch * 3;
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const int b = sizeof(Pixel);
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assert(IS_ALIGNED(dstPtr, 2));
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while (height--) {
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r = dstPtr;
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for (int i = 0; i < width; ++i, r += b * 3) {
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Pixel color = *(((const Pixel *)srcPtr) + i);
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*(Pixel *)(r + b * 0) = color;
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*(Pixel *)(r + b * 1) = color;
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*(Pixel *)(r + b * 2) = color;
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*(Pixel *)(r + b * 0 + dstPitch) = color;
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*(Pixel *)(r + b * 1 + dstPitch) = color;
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*(Pixel *)(r + b * 2 + dstPitch) = color;
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*(Pixel *)(r + b * 0 + dstPitch2) = color;
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*(Pixel *)(r + b * 1 + dstPitch2) = color;
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*(Pixel *)(r + b * 2 + dstPitch2) = color;
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}
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srcPtr += srcPitch;
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dstPtr += dstPitch3;
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}
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}
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/**
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* Trivial nearest-neighbor 4x scaler.
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*/
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template<typename Pixel>
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void Normal4x(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
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int width, int height) {
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uint8 *r;
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const uint32 dstPitch2 = dstPitch * 2;
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const uint32 dstPitch3 = dstPitch * 3;
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const uint32 dstPitch4 = dstPitch * 4;
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const int b = sizeof(Pixel);
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assert(IS_ALIGNED(dstPtr, 2));
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while (height--) {
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r = dstPtr;
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for (int i = 0; i < width; ++i, r += b * 4) {
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Pixel color = *(((const Pixel *)srcPtr) + i);
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*(Pixel *)(r + b * 0) = color;
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*(Pixel *)(r + b * 1) = color;
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*(Pixel *)(r + b * 2) = color;
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*(Pixel *)(r + b * 3) = color;
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*(Pixel *)(r + b * 0 + dstPitch) = color;
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*(Pixel *)(r + b * 1 + dstPitch) = color;
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*(Pixel *)(r + b * 2 + dstPitch) = color;
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*(Pixel *)(r + b * 3 + dstPitch) = color;
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*(Pixel *)(r + b * 0 + dstPitch2) = color;
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*(Pixel *)(r + b * 1 + dstPitch2) = color;
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*(Pixel *)(r + b * 2 + dstPitch2) = color;
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*(Pixel *)(r + b * 3 + dstPitch2) = color;
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*(Pixel *)(r + b * 0 + dstPitch3) = color;
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*(Pixel *)(r + b * 1 + dstPitch3) = color;
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*(Pixel *)(r + b * 2 + dstPitch3) = color;
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*(Pixel *)(r + b * 3 + dstPitch3) = color;
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}
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srcPtr += srcPitch;
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dstPtr += dstPitch4;
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}
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}
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/**
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* Trivial nearest-neighbor 5x scaler.
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*/
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template<typename Pixel>
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void Normal5x(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
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int width, int height) {
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uint8 *r;
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const uint32 dstPitch2 = dstPitch * 2;
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const uint32 dstPitch3 = dstPitch * 3;
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const uint32 dstPitch4 = dstPitch * 4;
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const uint32 dstPitch5 = dstPitch * 5;
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const int b = sizeof(Pixel);
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assert(IS_ALIGNED(dstPtr, 2));
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while (height--) {
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r = dstPtr;
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for (int i = 0; i < width; ++i, r += b * 5) {
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Pixel color = *(((const Pixel *)srcPtr) + i);
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*(Pixel *)(r + b * 0) = color;
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*(Pixel *)(r + b * 1) = color;
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*(Pixel *)(r + b * 2) = color;
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*(Pixel *)(r + b * 3) = color;
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*(Pixel *)(r + b * 4) = color;
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*(Pixel *)(r + b * 0 + dstPitch) = color;
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*(Pixel *)(r + b * 1 + dstPitch) = color;
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*(Pixel *)(r + b * 2 + dstPitch) = color;
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*(Pixel *)(r + b * 3 + dstPitch) = color;
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*(Pixel *)(r + b * 4 + dstPitch) = color;
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*(Pixel *)(r + b * 0 + dstPitch2) = color;
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*(Pixel *)(r + b * 1 + dstPitch2) = color;
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*(Pixel *)(r + b * 2 + dstPitch2) = color;
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*(Pixel *)(r + b * 3 + dstPitch2) = color;
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*(Pixel *)(r + b * 4 + dstPitch2) = color;
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*(Pixel *)(r + b * 0 + dstPitch3) = color;
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*(Pixel *)(r + b * 1 + dstPitch3) = color;
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*(Pixel *)(r + b * 2 + dstPitch3) = color;
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*(Pixel *)(r + b * 3 + dstPitch3) = color;
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*(Pixel *)(r + b * 4 + dstPitch3) = color;
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*(Pixel *)(r + b * 0 + dstPitch4) = color;
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*(Pixel *)(r + b * 1 + dstPitch4) = color;
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*(Pixel *)(r + b * 2 + dstPitch4) = color;
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*(Pixel *)(r + b * 3 + dstPitch4) = color;
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*(Pixel *)(r + b * 4 + dstPitch4) = color;
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}
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srcPtr += srcPitch;
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dstPtr += dstPitch5;
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}
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}
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#endif
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void NormalScaler::scaleIntern(const uint8 *srcPtr, uint32 srcPitch,
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uint8 *dstPtr, uint32 dstPitch, int width, int height, int x, int y) {
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#ifdef USE_SCALERS
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if (_format.bytesPerPixel == 1) {
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switch (_factor) {
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case 2:
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Normal2x<uint8>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
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break;
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case 3:
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Normal3x<uint8>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
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break;
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case 4:
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Normal4x<uint8>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
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break;
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case 5:
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Normal5x<uint8>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
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break;
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}
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} else if (_format.bytesPerPixel == 2) {
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switch (_factor) {
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case 2:
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#ifdef USE_ARM_SCALER_ASM
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Normal2xARM(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
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#else
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Normal2x<uint16>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
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#endif
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break;
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case 3:
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Normal3x<uint16>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
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break;
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case 4:
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Normal4x<uint16>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
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break;
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case 5:
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Normal5x<uint16>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
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break;
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}
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} else {
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assert(_format.bytesPerPixel == 4);
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switch (_factor) {
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case 2:
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Normal2x<uint32>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
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break;
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case 3:
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Normal3x<uint32>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
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break;
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case 4:
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Normal4x<uint32>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
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break;
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case 5:
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Normal5x<uint32>(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
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break;
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}
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}
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#endif
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}
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uint NormalScaler::increaseFactor() {
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#ifdef USE_SCALERS
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if (_factor < 5)
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setFactor(_factor + 1);
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#endif
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return _factor;
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}
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uint NormalScaler::decreaseFactor() {
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#ifdef USE_SCALERS
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if (_factor > 1)
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setFactor(_factor - 1);
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#endif
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return _factor;
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}
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class NormalPlugin final : public ScalerPluginObject {
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public:
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NormalPlugin();
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Scaler *createInstance(const Graphics::PixelFormat &format) const override;
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bool canDrawCursor() const override { return true; }
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uint extraPixels() const override { return 0; }
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const char *getName() const override;
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const char *getPrettyName() const override;
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};
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NormalPlugin::NormalPlugin() {
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_factors.push_back(1);
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#ifdef USE_SCALERS
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_factors.push_back(2);
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_factors.push_back(3);
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_factors.push_back(4);
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_factors.push_back(5);
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#endif
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}
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Scaler *NormalPlugin::createInstance(const Graphics::PixelFormat &format) const {
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return new NormalScaler(format);
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}
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const char *NormalPlugin::getName() const {
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return "normal";
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}
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const char *NormalPlugin::getPrettyName() const {
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return "Normal";
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}
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REGISTER_PLUGIN_STATIC(NORMAL, PLUGIN_TYPE_SCALER, NormalPlugin);
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