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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:06:44 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:06:44 +0000 |
commit | ed5640d8b587fbcfed7dd7967f3de04b37a76f26 (patch) | |
tree | 7a5f7c6c9d02226d7471cb3cc8fbbf631b415303 /vcl/skia/osx/bitmap.cxx | |
parent | Initial commit. (diff) | |
download | libreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.tar.xz libreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.zip |
Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'vcl/skia/osx/bitmap.cxx')
-rw-r--r-- | vcl/skia/osx/bitmap.cxx | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/vcl/skia/osx/bitmap.cxx b/vcl/skia/osx/bitmap.cxx new file mode 100644 index 000000000..16d32191a --- /dev/null +++ b/vcl/skia/osx/bitmap.cxx @@ -0,0 +1,97 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * Some of this code is based on Skia source code, covered by the following + * license notice (see readlicense_oo for the full license): + * + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + * + */ + +#include <skia/osx/bitmap.hxx> + +#include <vcl/bitmapex.hxx> +#include <vcl/image.hxx> + +#include <skia/salbmp.hxx> +#include <osx/saldata.hxx> + +#include <SkBitmap.h> +#include <SkCanvas.h> + +using namespace SkiaHelper; + +namespace SkiaHelper +{ +CGImageRef createCGImage(const Image& rImage) +{ + BitmapEx bitmapEx(rImage.GetBitmapEx()); + Bitmap bitmap(bitmapEx.GetBitmap()); + + if (bitmap.IsEmpty() || !bitmap.ImplGetSalBitmap()) + return nullptr; + + assert(dynamic_cast<SkiaSalBitmap*>(bitmap.ImplGetSalBitmap().get()) != nullptr); + SkiaSalBitmap* skiaBitmap = static_cast<SkiaSalBitmap*>(bitmap.ImplGetSalBitmap().get()); + + SkBitmap targetBitmap; + if (!targetBitmap.tryAllocPixels( + SkImageInfo::Make(bitmap.GetSizePixel().getWidth(), bitmap.GetSizePixel().getHeight(), + kRGBA_8888_SkColorType, kPremul_SkAlphaType))) + return nullptr; + SkPaint paint; + paint.setBlendMode(SkBlendMode::kSrc); // set as is + SkMatrix matrix; // The image is needed upside-down. + matrix.preTranslate(0, targetBitmap.height()); + matrix.setConcat(matrix, SkMatrix::Scale(1, -1)); + + if (!bitmapEx.IsAlpha()) + { + SkCanvas canvas(targetBitmap); + canvas.concat(matrix); + canvas.drawImage(skiaBitmap->GetSkImage(), 0, 0, SkSamplingOptions(), &paint); + } + else + { + AlphaMask alpha(bitmapEx.GetAlpha()); + Bitmap alphaBitmap(alpha.GetBitmap()); + assert(dynamic_cast<SkiaSalBitmap*>(alphaBitmap.ImplGetSalBitmap().get()) != nullptr); + SkiaSalBitmap* skiaAlpha + = static_cast<SkiaSalBitmap*>(alphaBitmap.ImplGetSalBitmap().get()); +#if 0 + // Drawing to a bitmap using a shader from a GPU-backed image fails silently. + // https://bugs.chromium.org/p/skia/issues/detail?id=12685 + paint.setShader(SkShaders::Blend(SkBlendMode::kDstOut, + skiaBitmap->GetSkShader(SkSamplingOptions()), + skiaAlpha->GetAlphaSkShader(SkSamplingOptions()))); +#else + sk_sp<SkImage> imB = skiaBitmap->GetSkImage()->makeNonTextureImage(); + sk_sp<SkImage> imA = skiaAlpha->GetAlphaSkImage()->makeNonTextureImage(); + paint.setShader(SkShaders::Blend(SkBlendMode::kDstOut, imB->makeShader(SkSamplingOptions()), + imA->makeShader(SkSamplingOptions()))); +#endif + SkCanvas canvas(targetBitmap); + canvas.concat(matrix); + canvas.drawPaint(paint); + } + + CGContextRef context = CGBitmapContextCreate( + targetBitmap.getAddr32(0, 0), targetBitmap.width(), targetBitmap.height(), 8, + targetBitmap.rowBytes(), GetSalData()->mxRGBSpace, kCGImageAlphaPremultipliedLast); + if (!context) + return nullptr; + CGImageRef screenImage = CGBitmapContextCreateImage(context); + CFRelease(context); + return screenImage; +} +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |