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/* -*- 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/.
*/
#include <skia/win/gdiimpl.hxx>
#include <win/saldata.hxx>
#include <vcl/skia/SkiaHelper.hxx>
#include <skia/utils.hxx>
#include <SkColorFilter.h>
#include <SkPixelRef.h>
#include <tools/sk_app/win/WindowContextFactory_win.h>
#include <tools/sk_app/WindowContext.h>
WinSkiaSalGraphicsImpl::WinSkiaSalGraphicsImpl(WinSalGraphics& rGraphics,
SalGeometryProvider* mpProvider)
: SkiaSalGraphicsImpl(rGraphics, mpProvider)
, mWinParent(rGraphics)
{
}
void WinSkiaSalGraphicsImpl::createWindowContext()
{
// When created, Init() gets called with size (0,0), which is invalid size
// for Skia. Creating the actual surface is delayed, so the size should be always
// valid here, but better check.
assert((GetWidth() != 0 && GetHeight() != 0) || isOffscreen());
sk_app::DisplayParams displayParams;
switch (SkiaHelper::renderMethodToUse())
{
case SkiaHelper::RenderRaster:
mWindowContext = sk_app::window_context_factory::MakeRasterForWin(mWinParent.gethWnd(),
displayParams);
mIsGPU = false;
break;
case SkiaHelper::RenderVulkan:
mWindowContext = sk_app::window_context_factory::MakeVulkanForWin(mWinParent.gethWnd(),
displayParams);
mIsGPU = true;
break;
}
}
void WinSkiaSalGraphicsImpl::DeInit()
{
SkiaSalGraphicsImpl::DeInit();
mWindowContext.reset();
}
void WinSkiaSalGraphicsImpl::freeResources() {}
void WinSkiaSalGraphicsImpl::performFlush()
{
mPendingPixelsToFlush = 0;
if (mWindowContext)
mWindowContext->swapBuffers();
}
bool WinSkiaSalGraphicsImpl::TryRenderCachedNativeControl(ControlCacheKey const& rControlCacheKey,
int nX, int nY)
{
static bool gbCacheEnabled = !getenv("SAL_WITHOUT_WIDGET_CACHE");
if (!gbCacheEnabled)
return false;
auto& controlsCache = SkiaControlsCache::get();
SkiaControlCacheType::const_iterator iterator = controlsCache.find(rControlCacheKey);
if (iterator == controlsCache.end())
return false;
preDraw();
mSurface->getCanvas()->drawImage(iterator->second, nX, nY);
postDraw();
return true;
}
bool WinSkiaSalGraphicsImpl::RenderAndCacheNativeControl(CompatibleDC& /*rWhite*/,
CompatibleDC& rBlack, int nX, int nY,
ControlCacheKey& aControlCacheKey)
{
// assert(dynamic_cast<SkiaCompatibleDC*>(&rWhite));
assert(dynamic_cast<SkiaCompatibleDC*>(&rBlack));
// Native widgets are drawn twice on black/white background, which comes from an OpenGL
// commit c6b66646870cb2bffaa73565affcf80bf74e0b5c, where it is used to synthetize alpha.
// But getting the Windows theming API to draw into an empty area (fully transparent)
// actually results in the widget being in the premultiplied alpha format (and I have no
// idea why the OpenGL code uses the weird undocumented pixel diffing it does, probably
// the author did not realize this). Simply use the black variant as premultiplied data.
// TODO Remove the white variant completely once OpenGL code is removed.
sk_sp<SkImage> image = static_cast<SkiaCompatibleDC&>(rBlack).getAsImage(true);
preDraw();
mSurface->getCanvas()->drawImage(image, nX, nY);
postDraw();
if (!aControlCacheKey.canCacheControl())
return true;
SkiaControlCachePair pair(aControlCacheKey, std::move(image));
SkiaControlsCache::get().insert(std::move(pair));
return true;
}
void WinSkiaSalGraphicsImpl::PreDrawText() { preDraw(); }
void WinSkiaSalGraphicsImpl::PostDrawText() { postDraw(); }
static SkColor toSkColor(Color color)
{
return SkColorSetARGB(255 - color.GetTransparency(), color.GetRed(), color.GetGreen(),
color.GetBlue());
}
void WinSkiaSalGraphicsImpl::DeferredTextDraw(const CompatibleDC::Texture* pTexture,
Color aMaskColor, const SalTwoRect& rPosAry)
{
assert(dynamic_cast<const SkiaCompatibleDC::PackedTexture*>(pTexture));
const SkiaCompatibleDC::PackedTexture* texture
= static_cast<const SkiaCompatibleDC::PackedTexture*>(pTexture);
preDraw();
SkPaint paint;
// The glyph is painted as white, modulate it to be of the appropriate color.
// SkiaCompatibleDC::wantsTextColorWhite() ensures the glyph is white.
// TODO maybe other black/white in WinFontInstance::CacheGlyphToAtlas() should be swapped.
paint.setColorFilter(SkColorFilters::Blend(toSkColor(aMaskColor), SkBlendMode::kModulate));
// We use SkiaPackedSurface, so use also the appropriate rectangle in the source SkSurface.
const tools::Rectangle& rect = texture->packedSurface.mRect;
// The source in SalTwoRect is actually just the size.
assert(rPosAry.mnSrcX == 0 && rPosAry.mnSrcY == 0);
assert(rPosAry.mnSrcWidth == rect.GetWidth());
assert(rPosAry.mnSrcHeight == rect.GetHeight());
mSurface->getCanvas()->drawImageRect(
texture->packedSurface.mSurface->makeImageSnapshot(),
SkRect::MakeXYWH(rect.getX(), rect.getY(), rect.GetWidth(), rect.GetHeight()),
SkRect::MakeXYWH(rPosAry.mnDestX, rPosAry.mnDestY, rPosAry.mnDestWidth,
rPosAry.mnDestHeight),
&paint);
postDraw();
}
void WinSkiaSalGraphicsImpl::DrawTextMask(CompatibleDC::Texture* pTexture, Color nMaskColor,
const SalTwoRect& rPosAry)
{
assert(dynamic_cast<SkiaCompatibleDC::Texture*>(pTexture));
drawMask(rPosAry, static_cast<const SkiaCompatibleDC::Texture*>(pTexture)->image, nMaskColor);
}
SkiaCompatibleDC::SkiaCompatibleDC(SalGraphics& rGraphics, int x, int y, int width, int height)
: CompatibleDC(rGraphics, x, y, width, height, false)
{
}
std::unique_ptr<CompatibleDC::Texture> SkiaCompatibleDC::getAsMaskTexture() const
{
auto ret = std::make_unique<SkiaCompatibleDC::Texture>();
ret->image = getAsMaskImage();
return ret;
}
sk_sp<SkImage> SkiaCompatibleDC::getAsMaskImage() const
{
// mpData is in the BGRA format, with A unused (and set to 0), and RGB are grey,
// so convert it to Skia format, then to 8bit and finally use as alpha mask
SkBitmap tmpBitmap;
if (!tmpBitmap.installPixels(SkImageInfo::Make(maRects.mnSrcWidth, maRects.mnSrcHeight,
kBGRA_8888_SkColorType, kOpaque_SkAlphaType),
mpData, maRects.mnSrcWidth * 4))
abort();
tmpBitmap.setImmutable();
SkBitmap bitmap8;
if (!bitmap8.tryAllocPixels(SkImageInfo::Make(maRects.mnSrcWidth, maRects.mnSrcHeight,
kGray_8_SkColorType, kOpaque_SkAlphaType)))
abort();
SkCanvas canvas8(bitmap8);
SkPaint paint8;
paint8.setBlendMode(SkBlendMode::kSrc); // copy and convert depth
// The data we got is upside-down.
SkMatrix matrix;
matrix.preTranslate(0, maRects.mnSrcHeight);
matrix.setConcat(matrix, SkMatrix::MakeScale(1, -1));
canvas8.concat(matrix);
canvas8.drawBitmap(tmpBitmap, 0, 0, &paint8);
bitmap8.setImmutable();
// use the 8bit data as an alpha channel
SkBitmap alpha;
alpha.setInfo(bitmap8.info().makeColorType(kAlpha_8_SkColorType), bitmap8.rowBytes());
alpha.setPixelRef(sk_ref_sp(bitmap8.pixelRef()), bitmap8.pixelRefOrigin().x(),
bitmap8.pixelRefOrigin().y());
alpha.setImmutable();
sk_sp<SkSurface> surface
= SkiaHelper::createSkSurface(alpha.width(), alpha.height(), kAlpha_8_SkColorType);
// https://bugs.chromium.org/p/skia/issues/detail?id=9692
// Raster kAlpha_8_SkColorType surfaces need empty contents for SkBlendMode::kSrc.
if (!surface->getCanvas()->getGrContext())
surface->getCanvas()->clear(SkColorSetARGB(0x00, 0x00, 0x00, 0x00));
SkPaint paint;
paint.setBlendMode(SkBlendMode::kSrc); // set as is, including alpha
surface->getCanvas()->drawBitmap(alpha, 0, 0, &paint);
return surface->makeImageSnapshot();
}
sk_sp<SkImage> SkiaCompatibleDC::getAsImage(bool fromPremultiplied) const
{
SkBitmap tmpBitmap;
if (!tmpBitmap.installPixels(
SkImageInfo::Make(maRects.mnSrcWidth, maRects.mnSrcHeight, kBGRA_8888_SkColorType,
fromPremultiplied ? kPremul_SkAlphaType : kUnpremul_SkAlphaType),
mpData, maRects.mnSrcWidth * 4))
abort();
tmpBitmap.setImmutable();
sk_sp<SkSurface> surface = SkiaHelper::createSkSurface(tmpBitmap.width(), tmpBitmap.height());
SkPaint paint;
paint.setBlendMode(SkBlendMode::kSrc); // set as is, including alpha
SkCanvas* canvas = surface->getCanvas();
canvas->save();
// The data we got is upside-down.
SkMatrix matrix;
matrix.preTranslate(0, maRects.mnSrcHeight);
matrix.setConcat(matrix, SkMatrix::MakeScale(1, -1));
canvas->concat(matrix);
canvas->drawBitmapRect(tmpBitmap,
SkRect::MakeXYWH(0, 0, maRects.mnSrcWidth, maRects.mnSrcHeight),
SkRect::MakeXYWH(0, 0, maRects.mnSrcWidth, maRects.mnSrcHeight), &paint);
canvas->restore();
return surface->makeImageSnapshot();
}
SkiaControlsCache::SkiaControlsCache()
: cache(200)
{
}
SkiaControlCacheType& SkiaControlsCache::get()
{
SalData* data = GetSalData();
if (!data->m_pSkiaControlsCache)
data->m_pSkiaControlsCache.reset(new SkiaControlsCache);
return data->m_pSkiaControlsCache->cache;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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