136 lines
3.4 KiB
C++
136 lines
3.4 KiB
C++
/*
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Copyright (c) 2013 yvt
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This file is part of OpenSpades.
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OpenSpades 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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OpenSpades 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 OpenSpades. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "SWImage.h"
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#include <Core/FileManager.h>
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#include <Core/IStream.h>
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namespace spades {
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namespace draw {
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namespace {
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inline uint32_t ProcessPixel(uint32_t col) {
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unsigned int alpha = static_cast<unsigned int>(col >> 24);
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alpha += (alpha >> 7); // [0,255] to [0,256]
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unsigned int r = static_cast<unsigned int>((col >> 0) & 0xff);
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unsigned int g = static_cast<unsigned int>((col >> 8) & 0xff);
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unsigned int b = static_cast<unsigned int>((col >> 16) & 0xff);
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r = (r * alpha) >> 8;
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g = (g * alpha) >> 8;
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b = (b * alpha) >> 8;
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col &= 0xff000000;
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col |= b | (g << 8) | (r << 16); // swap RGB/BGR
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return col;
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}
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}
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SWImage::SWImage(Bitmap *m)
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: ew(m->GetWidth()),
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eh(m->GetHeight()),
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isWhite(false),
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w(static_cast<float>(m->GetWidth())),
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h(static_cast<float>(m->GetHeight())),
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iw(1.f / w),
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ih(1.f / h) {
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bmp.resize(ew * eh);
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// premultiplied alpha
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{
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uint32_t *inpix = m->GetPixels();
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uint32_t *outpix = bmp.data();
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bool foundNonWhite = false;
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for (std::size_t i = ew * eh; i; i--) {
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uint32_t col = *(inpix++);
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col = ProcessPixel(col);
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*(outpix++) = col;
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if (col != 0xffffffff)
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foundNonWhite = true;
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}
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isWhite = !foundNonWhite;
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}
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}
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SWImage::SWImage(int w, int h)
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: ew(w),
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eh(h),
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isWhite(false),
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w(static_cast<float>(ew)),
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h(static_cast<float>(eh)),
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iw(1.f / w),
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ih(1.f / h) {
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bmp.reserve(ew * eh);
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}
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SWImage::~SWImage() {}
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void SWImage::Update(Bitmap &inBmp, int x, int y) {
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SPADES_MARK_FUNCTION();
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if (x < 0 || y < 0 || x + inBmp.GetWidth() > ew || y + inBmp.GetHeight() > eh) {
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SPRaise("Out of range.");
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}
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{
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int bw = inBmp.GetWidth();
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int bh = inBmp.GetHeight();
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for (int yy = 0; yy < bh; ++yy) {
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uint32_t *inpix = inBmp.GetPixels();
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uint32_t *outpix = bmp.data();
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outpix += x + (y + yy) * ew;
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inpix += yy * bw;
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for (unsigned int j = bw; j; --j) {
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*(outpix++) = ProcessPixel(*(inpix++));
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}
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}
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}
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isWhite = false;
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}
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SWImageManager::~SWImageManager() {
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for (auto it = images.begin(); it != images.end(); it++)
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it->second->Release();
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}
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SWImage *SWImageManager::RegisterImage(const std::string &name) {
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auto it = images.find(name);
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if (it == images.end()) {
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Handle<Bitmap> vm;
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vm.Set(Bitmap::Load(name), false);
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auto *m = CreateImage(vm);
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images.insert(std::make_pair(name, m));
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m->AddRef();
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return m;
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} else {
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auto *image = it->second;
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image->AddRef();
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return image;
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}
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}
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SWImage *SWImageManager::CreateImage(Bitmap *vm) { return new SWImage(vm); }
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void SWImageManager::ClearCache() {
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images.clear();
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}
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}
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}
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