cfb972f944
- Overriding methods are clearly indicated with `override` keywords - Remove redundant `virtual` keywords from destructors of subclasses - Introduce `SPUnsupported()`, replacing most uses of `SPNotImplemented()`, which now serves as a dynamic "TODO" marker
116 lines
3.0 KiB
C++
116 lines
3.0 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 "Bitmap.h"
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#include "Debug.h"
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#include "Exception.h"
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#include "IBitmapCodec.h"
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#include "IStream.h"
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#include "jpge.h"
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#include <Core/Settings.h>
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// FIXME: make this changable for every calls for "Save"
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DEFINE_SPADES_SETTING(core_jpegQuality, "95");
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namespace spades {
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class JpegWriter : public IBitmapCodec {
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class OutputStream : public jpge::output_stream {
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IStream *stream;
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public:
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OutputStream(IStream *stream) : stream(stream) {}
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virtual ~OutputStream() {}
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virtual bool put_buf(const void *Pbuf, int len) {
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try {
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stream->Write(Pbuf, len);
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return true;
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} catch (...) {
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return false;
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}
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}
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};
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public:
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bool CanLoad() override { return false; }
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bool CanSave() override { return true; }
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bool CheckExtension(const std::string &filename) override {
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return EndsWith(filename, ".jpg") || EndsWith(filename, ".jpeg") ||
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EndsWith(filename, ".jpe");
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}
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std::string GetName() override {
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static std::string name("JPEG Exporter");
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return name;
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}
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Bitmap *Load(IStream *str) override {
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SPADES_MARK_FUNCTION();
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SPUnreachable();
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}
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void Save(IStream *stream, Bitmap *bmp) override {
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SPADES_MARK_FUNCTION();
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jpge::params params;
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params.m_quality = core_jpegQuality;
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if (params.m_quality < 1 || params.m_quality > 100) {
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SPRaise("Invalid core_jpegQuality");
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}
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OutputStream outStream(stream);
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jpge::jpeg_encoder encoder;
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if (!encoder.init(&outStream, bmp->GetWidth(), bmp->GetHeight(), 3, params)) {
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SPRaise("JPEG encoder initialization failed.");
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}
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auto *pixels = bmp->GetPixels();
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std::vector<uint8_t> lineBuffer;
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int w = bmp->GetWidth();
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int h = bmp->GetHeight();
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lineBuffer.resize(w * 3);
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for (jpge::uint pass = 0; pass < encoder.get_total_passes(); pass++) {
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for (int y = 0; y < h; y++) {
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auto *pix = pixels + (h - 1 - y) * w;
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for (auto *out = lineBuffer.data(), *end = out + w * 3; out != end;) {
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auto p = *(pix++);
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*(out++) = static_cast<uint8_t>(p);
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*(out++) = static_cast<uint8_t>(p >> 8);
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*(out++) = static_cast<uint8_t>(p >> 16);
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}
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if (!encoder.process_scanline(lineBuffer.data())) {
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SPRaise("JPEG encoder processing failed.");
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}
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}
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if (!encoder.process_scanline(nullptr)) {
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SPRaise("JPEG encoder processing failed.");
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}
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}
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encoder.deinit();
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}
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};
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static JpegWriter sharedCodec;
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}
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