mirror of
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123 lines
3.1 KiB
C++
123 lines
3.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "gfxUtils.h"
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#include "mozilla/Range.h"
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#include "mozilla/gfx/2D.h"
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#include "mozilla/gfx/InlineTranslator.h"
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#include "mozilla/gfx/RecordedEvent.h"
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#include "WebRenderTypes.h"
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#include <iostream>
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#ifdef MOZ_ENABLE_FREETYPE
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#include "mozilla/ThreadLocal.h"
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#endif
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namespace mozilla {
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namespace wr {
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class InMemoryStreamBuffer: public std::streambuf
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{
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public:
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explicit InMemoryStreamBuffer(const Range<const uint8_t> aBlob)
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{
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// we need to cast away the const because C++ doesn't
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// have a separate type of streambuf that can only
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// be read from
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auto start = const_cast<char*>(reinterpret_cast<const char*>(aBlob.begin().get()));
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setg(start, start, start + aBlob.length());
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}
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};
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#ifdef MOZ_ENABLE_FREETYPE
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static MOZ_THREAD_LOCAL(FT_Library) sFTLibrary;
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#endif
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static bool Moz2DRenderCallback(const Range<const uint8_t> aBlob,
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gfx::IntSize aSize,
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gfx::SurfaceFormat aFormat,
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Range<uint8_t> aOutput)
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{
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MOZ_ASSERT(aSize.width > 0 && aSize.height > 0);
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if (aSize.width <= 0 || aSize.height <= 0) {
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return false;
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}
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auto stride = aSize.width * gfx::BytesPerPixel(aFormat);
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if (aOutput.length() < static_cast<size_t>(aSize.height * stride)) {
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return false;
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}
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void* fontContext = nullptr;
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#ifdef MOZ_ENABLE_FREETYPE
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if (!sFTLibrary.init()) {
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return false;
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}
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if (!sFTLibrary.get()) {
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FT_Library library = gfx::Factory::NewFTLibrary();
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if (!library) {
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return false;
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}
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sFTLibrary.set(library);
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}
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fontContext = sFTLibrary.get();
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#endif
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// In bindings.rs we allocate a buffer filled with opaque white.
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bool uninitialized = false;
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RefPtr<gfx::DrawTarget> dt = gfx::Factory::CreateDrawTargetForData(
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gfx::BackendType::SKIA,
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aOutput.begin().get(),
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aSize,
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stride,
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aFormat,
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uninitialized
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);
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if (!dt) {
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return false;
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}
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InMemoryStreamBuffer streamBuffer(aBlob);
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std::istream stream(&streamBuffer);
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gfx::InlineTranslator translator(dt, fontContext);
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auto ret = translator.TranslateRecording(stream);
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#if 0
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static int i = 0;
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char filename[40];
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sprintf(filename, "out%d.png", i++);
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gfxUtils::WriteAsPNG(dt, filename);
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#endif
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return ret;
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}
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} // namespace
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} // namespace
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extern "C" {
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bool wr_moz2d_render_cb(const WrByteSlice blob,
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uint32_t width, uint32_t height,
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mozilla::wr::ImageFormat aFormat,
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MutByteSlice output)
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{
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return mozilla::wr::Moz2DRenderCallback(mozilla::wr::ByteSliceToRange(blob),
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mozilla::gfx::IntSize(width, height),
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mozilla::wr::WrImageFormatToSurfaceFormat(aFormat),
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mozilla::wr::MutByteSliceToRange(output));
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}
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} // extern
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