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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 <vcl/skia/SkiaHelper.hxx>
#include <vcl/svapp.hxx>
#include <desktop/crashreport.hxx>
#include <officecfg/Office/Common.hxx>
#if !HAVE_FEATURE_SKIA
namespace SkiaHelper
{
bool isVCLSkiaEnabled() { return false; }
} // namespace
#else
#include <skia/utils.hxx>
#include <SkSurface.h>
#include <tools/sk_app/VulkanWindowContext.h>
#ifdef DBG_UTIL
#include <fstream>
#endif
namespace SkiaHelper
{
static bool supportsVCLSkia()
{
static bool bDisableSkia = !!getenv("SAL_DISABLESKIA");
bool bBlacklisted = false; // TODO isDeviceBlacklisted();
return !bDisableSkia && !bBlacklisted;
}
bool isVCLSkiaEnabled()
{
/**
* The !bSet part should only be called once! Changing the results in the same
* run will mix Skia and normal rendering.
*/
static bool bSet = false;
static bool bEnable = false;
static bool bForceSkia = false;
// No hardware rendering, so no Skia
// TODO SKIA
if (Application::IsBitmapRendering())
return false;
if (bSet)
{
return bForceSkia || bEnable;
}
/*
* There are a number of cases that these environment variables cover:
* * SAL_FORCESKIA forces Skia independent of any other option
* * SAL_DISABLESKIA avoids the use of Skia if SAL_FORCESKIA is not set
*/
bSet = true;
bForceSkia = !!getenv("SAL_FORCESKIA") || officecfg::Office::Common::VCL::ForceSkia::get();
bool bRet = false;
bool bSupportsVCLSkia = supportsVCLSkia();
if (bForceSkia)
{
bRet = true;
}
else if (bSupportsVCLSkia)
{
static bool bEnableSkiaEnv = !!getenv("SAL_ENABLESKIA");
bEnable = bEnableSkiaEnv;
if (officecfg::Office::Common::VCL::UseSkia::get())
bEnable = true;
// Force disable in safe mode
if (Application::IsSafeModeEnabled())
bEnable = false;
bRet = bEnable;
}
CrashReporter::addKeyValue("UseSkia", OUString::boolean(bRet), CrashReporter::Write);
return bRet;
}
static RenderMethod methodToUse = RenderRaster;
static bool initRenderMethodToUse()
{
if (const char* env = getenv("SAL_SKIA"))
{
if (strcmp(env, "raster") == 0)
{
methodToUse = RenderRaster;
return true;
}
}
methodToUse = RenderVulkan;
return true;
}
RenderMethod renderMethodToUse()
{
static bool methodToUseInited = initRenderMethodToUse();
if (methodToUseInited) // Used just to ensure thread-safe one-time init.
return methodToUse;
abort();
}
void disableRenderMethod(RenderMethod method)
{
if (renderMethodToUse() != method)
return;
// Choose a fallback, right now always raster.
methodToUse = RenderRaster;
}
static sk_app::VulkanWindowContext::SharedGrContext* sharedGrContext;
GrContext* getSharedGrContext()
{
assert(renderMethodToUse() == RenderVulkan);
if (sharedGrContext)
return sharedGrContext->getGrContext();
// TODO mutex?
// Setup the shared GrContext from Skia's (patched) VulkanWindowContext, if it's been
// already set up.
sk_app::VulkanWindowContext::SharedGrContext context
= sk_app::VulkanWindowContext::getSharedGrContext();
GrContext* grContext = context.getGrContext();
if (grContext)
{
sharedGrContext = new sk_app::VulkanWindowContext::SharedGrContext(context);
return grContext;
}
// TODO
// SkiaSalGraphicsImpl::createOffscreenSurface() creates the shared context using a dummy window,
// but we do not have a window here. Is it worth it to try to do it here?
return nullptr;
}
sk_sp<SkSurface> createSkSurface(int width, int height, SkColorType type)
{
assert(type == kN32_SkColorType || type == kAlpha_8_SkColorType);
sk_sp<SkSurface> surface;
switch (SkiaHelper::renderMethodToUse())
{
case SkiaHelper::RenderVulkan:
{
if (GrContext* grContext = getSharedGrContext())
{
surface = SkSurface::MakeRenderTarget(
grContext, SkBudgeted::kNo,
SkImageInfo::Make(width, height, type, kPremul_SkAlphaType));
assert(surface);
#ifdef DBG_UTIL
prefillSurface(surface);
#endif
return surface;
}
break;
}
default:
break;
}
// Create raster surface as a fallback.
surface = SkSurface::MakeRaster(SkImageInfo::Make(width, height, type, kPremul_SkAlphaType));
assert(surface);
#ifdef DBG_UTIL
prefillSurface(surface);
#endif
return surface;
}
void cleanup()
{
delete sharedGrContext;
sharedGrContext = nullptr;
}
#ifdef DBG_UTIL
void prefillSurface(sk_sp<SkSurface>& surface)
{
// Pre-fill the surface with deterministic garbage.
SkBitmap bitmap;
bitmap.allocN32Pixels(2, 2);
SkPMColor* scanline;
scanline = bitmap.getAddr32(0, 0);
*scanline++ = SkPreMultiplyARGB(0xFF, 0xBF, 0x80, 0x40);
*scanline++ = SkPreMultiplyARGB(0xFF, 0x40, 0x80, 0xBF);
scanline = bitmap.getAddr32(0, 1);
*scanline++ = SkPreMultiplyARGB(0xFF, 0xE3, 0x5C, 0x13);
*scanline++ = SkPreMultiplyARGB(0xFF, 0x13, 0x5C, 0xE3);
bitmap.setImmutable();
SkPaint paint;
paint.setBlendMode(SkBlendMode::kSrc); // set as is, including alpha
paint.setShader(bitmap.makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat));
surface->getCanvas()->drawPaint(paint);
}
void dump(const SkBitmap& bitmap, const char* file) { dump(SkImage::MakeFromBitmap(bitmap), file); }
void dump(const sk_sp<SkSurface>& surface, const char* file)
{
surface->getCanvas()->flush();
dump(surface->makeImageSnapshot(), file);
}
void dump(const sk_sp<SkImage>& image, const char* file)
{
sk_sp<SkData> data = image->encodeToData();
std::ofstream ostream(file, std::ios::binary);
ostream.write(static_cast<const char*>(data->data()), data->size());
}
#endif
} // namespace
#endif // HAVE_FEATURE_SKIA
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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