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skia2/tools/viewer/Viewer.cpp
Mike Klein 4429a4f82c re-precate SkMatrix44::SkMatrix44() 
It's been driving me nuts that I can't just write `SkMatrix44 m;`,
and I often don't care whether it's initialized or not.  The default
identity constructor would be nice to use, but it's deprecated.

By tagging this constructor deprecated, we're only hurting ourselves;
our big clients disable warnings about deprecated routines and use it
freely.

A quick tally in Skia shows we mostly use the uninitialized constructor,
but sometimes the identity constructor, and there is a spread of all
three in Chromium.  So I've left the two explicit calls available.

I switched a bunch of calls in Skia to use the less verbose constructor
where it was clear that it didn't matter if the matrix was initialized.
Literally zero of the kUninitialized constructor calls looked important
for performance, so the only place I've kept is its lone unit test.

A few places read clearer with an explicit "identity" to read.

Change-Id: I0573cb6201f5a36f3b43070fb111f7d9af92736f
Reviewed-on: https://skia-review.googlesource.com/c/159480
Reviewed-by: Brian Osman <brianosman@google.com>
2018-10-04 14:01:11 +00:00

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/*
* 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 "BisectSlide.h"
#include "GMSlide.h"
#include "GrContext.h"
#include "GrContextPriv.h"
#include "ImageSlide.h"
#include "Resources.h"
#include "SKPSlide.h"
#include "SampleSlide.h"
#include "SkCanvas.h"
#include "SkColorSpacePriv.h"
#include "SkColorSpaceXformCanvas.h"
#include "SkCommandLineFlags.h"
#include "SkCommonFlags.h"
#include "SkCommonFlagsGpu.h"
#include "SkEventTracingPriv.h"
#include "SkFontMgrPriv.h"
#include "SkGraphics.h"
#include "SkImagePriv.h"
#include "SkJSONWriter.h"
#include "SkMakeUnique.h"
#include "SkOSFile.h"
#include "SkOSPath.h"
#include "SkPaintFilterCanvas.h"
#include "SkPictureRecorder.h"
#include "SkScan.h"
#include "SkStream.h"
#include "SkSurface.h"
#include "SkTaskGroup.h"
#include "SkTestFontMgr.h"
#include "SkTo.h"
#include "SlideDir.h"
#include "SvgSlide.h"
#include "Viewer.h"
#include "ccpr/GrCoverageCountingPathRenderer.h"
#include <stdlib.h>
#include <map>
#include "imgui.h"
#if defined(SK_ENABLE_SKOTTIE)
#include "SkottieSlide.h"
#endif
#if !(defined(SK_BUILD_FOR_WIN) && defined(__clang__))
#include "NIMASlide.h"
#endif
using namespace sk_app;
static std::map<GpuPathRenderers, std::string> gPathRendererNames;
Application* Application::Create(int argc, char** argv, void* platformData) {
return new Viewer(argc, argv, platformData);
}
static DEFINE_string(slide, "", "Start on this sample.");
static DEFINE_bool(list, false, "List samples?");
#ifdef SK_VULKAN
# define BACKENDS_STR "\"sw\", \"gl\", and \"vk\""
#else
# define BACKENDS_STR "\"sw\" and \"gl\""
#endif
static DEFINE_string2(backend, b, "sw", "Backend to use. Allowed values are " BACKENDS_STR ".");
static DEFINE_int32(msaa, 1, "Number of subpixel samples. 0 for no HW antialiasing.");
DEFINE_string(bisect, "", "Path to a .skp or .svg file to bisect.");
DECLARE_int32(threads)
DEFINE_string2(file, f, "", "Open a single file for viewing.");
const char* kBackendTypeStrings[sk_app::Window::kBackendTypeCount] = {
"OpenGL",
#if SK_ANGLE && defined(SK_BUILD_FOR_WIN)
"ANGLE",
#endif
#ifdef SK_VULKAN
"Vulkan",
#endif
"Raster"
};
static sk_app::Window::BackendType get_backend_type(const char* str) {
#ifdef SK_VULKAN
if (0 == strcmp(str, "vk")) {
return sk_app::Window::kVulkan_BackendType;
} else
#endif
#if SK_ANGLE && defined(SK_BUILD_FOR_WIN)
if (0 == strcmp(str, "angle")) {
return sk_app::Window::kANGLE_BackendType;
} else
#endif
if (0 == strcmp(str, "gl")) {
return sk_app::Window::kNativeGL_BackendType;
} else if (0 == strcmp(str, "sw")) {
return sk_app::Window::kRaster_BackendType;
} else {
SkDebugf("Unknown backend type, %s, defaulting to sw.", str);
return sk_app::Window::kRaster_BackendType;
}
}
static SkColorSpacePrimaries gSrgbPrimaries = {
0.64f, 0.33f,
0.30f, 0.60f,
0.15f, 0.06f,
0.3127f, 0.3290f };
static SkColorSpacePrimaries gAdobePrimaries = {
0.64f, 0.33f,
0.21f, 0.71f,
0.15f, 0.06f,
0.3127f, 0.3290f };
static SkColorSpacePrimaries gP3Primaries = {
0.680f, 0.320f,
0.265f, 0.690f,
0.150f, 0.060f,
0.3127f, 0.3290f };
static SkColorSpacePrimaries gRec2020Primaries = {
0.708f, 0.292f,
0.170f, 0.797f,
0.131f, 0.046f,
0.3127f, 0.3290f };
struct NamedPrimaries {
const char* fName;
SkColorSpacePrimaries* fPrimaries;
} gNamedPrimaries[] = {
{ "sRGB", &gSrgbPrimaries },
{ "AdobeRGB", &gAdobePrimaries },
{ "P3", &gP3Primaries },
{ "Rec. 2020", &gRec2020Primaries },
};
static bool primaries_equal(const SkColorSpacePrimaries& a, const SkColorSpacePrimaries& b) {
return memcmp(&a, &b, sizeof(SkColorSpacePrimaries)) == 0;
}
static Window::BackendType backend_type_for_window(Window::BackendType backendType) {
// In raster mode, we still use GL for the window.
// This lets us render the GUI faster (and correct).
return Window::kRaster_BackendType == backendType ? Window::kNativeGL_BackendType : backendType;
}
const char* kName = "name";
const char* kValue = "value";
const char* kOptions = "options";
const char* kSlideStateName = "Slide";
const char* kBackendStateName = "Backend";
const char* kMSAAStateName = "MSAA";
const char* kPathRendererStateName = "Path renderer";
const char* kSoftkeyStateName = "Softkey";
const char* kSoftkeyHint = "Please select a softkey";
const char* kFpsStateName = "FPS";
const char* kON = "ON";
const char* kOFF = "OFF";
const char* kRefreshStateName = "Refresh";
Viewer::Viewer(int argc, char** argv, void* platformData)
: fCurrentSlide(-1)
, fRefresh(false)
, fSaveToSKP(false)
, fShowImGuiDebugWindow(false)
, fShowSlidePicker(false)
, fShowImGuiTestWindow(false)
, fShowZoomWindow(false)
, fZoomWindowFixed(false)
, fZoomWindowLocation{0.0f, 0.0f}
, fLastImage(nullptr)
, fZoomUI(false)
, fBackendType(sk_app::Window::kNativeGL_BackendType)
, fColorMode(ColorMode::kLegacy)
, fColorSpacePrimaries(gSrgbPrimaries)
// Our UI can only tweak gamma (currently), so start out gamma-only
, fColorSpaceTransferFn(g2Dot2_TransferFn)
, fZoomLevel(0.0f)
, fRotation(0.0f)
, fOffset{0.5f, 0.5f}
, fGestureDevice(GestureDevice::kNone)
, fPerspectiveMode(kPerspective_Off)
{
SkGraphics::Init();
gPathRendererNames[GpuPathRenderers::kAll] = "All Path Renderers";
gPathRendererNames[GpuPathRenderers::kStencilAndCover] = "NV_path_rendering";
gPathRendererNames[GpuPathRenderers::kSmall] = "Small paths (cached sdf or alpha masks)";
gPathRendererNames[GpuPathRenderers::kCoverageCounting] = "Coverage counting";
gPathRendererNames[GpuPathRenderers::kTessellating] = "Tessellating";
gPathRendererNames[GpuPathRenderers::kNone] = "Software masks";
SkDebugf("Command line arguments: ");
for (int i = 1; i < argc; ++i) {
SkDebugf("%s ", argv[i]);
}
SkDebugf("\n");
SkCommandLineFlags::Parse(argc, argv);
#ifdef SK_BUILD_FOR_ANDROID
SetResourcePath("/data/local/tmp/resources");
#endif
if (!FLAGS_nativeFonts) {
gSkFontMgr_DefaultFactory = &sk_tool_utils::MakePortableFontMgr;
}
initializeEventTracingForTools();
static SkTaskGroup::Enabler kTaskGroupEnabler(FLAGS_threads);
fBackendType = get_backend_type(FLAGS_backend[0]);
fWindow = Window::CreateNativeWindow(platformData);
DisplayParams displayParams;
displayParams.fMSAASampleCount = FLAGS_msaa;
SetCtxOptionsFromCommonFlags(&displayParams.fGrContextOptions);
fWindow->setRequestedDisplayParams(displayParams);
// Configure timers
fStatsLayer.setActive(false);
fAnimateTimer = fStatsLayer.addTimer("Animate", SK_ColorMAGENTA, 0xffff66ff);
fPaintTimer = fStatsLayer.addTimer("Paint", SK_ColorGREEN);
fFlushTimer = fStatsLayer.addTimer("Flush", SK_ColorRED, 0xffff6666);
// register callbacks
fCommands.attach(fWindow);
fWindow->pushLayer(this);
fWindow->pushLayer(&fStatsLayer);
fWindow->pushLayer(&fImGuiLayer);
// add key-bindings
fCommands.addCommand(' ', "GUI", "Toggle Debug GUI", [this]() {
this->fShowImGuiDebugWindow = !this->fShowImGuiDebugWindow;
fWindow->inval();
});
// Command to jump directly to the slide picker and give it focus
fCommands.addCommand('/', "GUI", "Jump to slide picker", [this]() {
this->fShowImGuiDebugWindow = true;
this->fShowSlidePicker = true;
fWindow->inval();
});
// Alias that to Backspace, to match SampleApp
fCommands.addCommand(Window::Key::kBack, "Backspace", "GUI", "Jump to slide picker", [this]() {
this->fShowImGuiDebugWindow = true;
this->fShowSlidePicker = true;
fWindow->inval();
});
fCommands.addCommand('g', "GUI", "Toggle GUI Demo", [this]() {
this->fShowImGuiTestWindow = !this->fShowImGuiTestWindow;
fWindow->inval();
});
fCommands.addCommand('z', "GUI", "Toggle zoom window", [this]() {
this->fShowZoomWindow = !this->fShowZoomWindow;
fWindow->inval();
});
fCommands.addCommand('Z', "GUI", "Toggle zoom window state", [this]() {
this->fZoomWindowFixed = !this->fZoomWindowFixed;
fWindow->inval();
});
fCommands.addCommand('s', "Overlays", "Toggle stats display", [this]() {
fStatsLayer.setActive(!fStatsLayer.getActive());
fWindow->inval();
});
fCommands.addCommand('0', "Overlays", "Reset stats", [this]() {
fStatsLayer.resetMeasurements();
this->updateTitle();
fWindow->inval();
});
fCommands.addCommand('c', "Modes", "Cycle color mode", [this]() {
switch (fColorMode) {
case ColorMode::kLegacy:
this->setColorMode(ColorMode::kColorManagedSRGB8888_NonLinearBlending);
break;
case ColorMode::kColorManagedSRGB8888_NonLinearBlending:
this->setColorMode(ColorMode::kColorManagedSRGB8888);
break;
case ColorMode::kColorManagedSRGB8888:
this->setColorMode(ColorMode::kColorManagedLinearF16);
break;
case ColorMode::kColorManagedLinearF16:
this->setColorMode(ColorMode::kLegacy);
break;
}
});
fCommands.addCommand(Window::Key::kRight, "Right", "Navigation", "Next slide", [this]() {
this->setCurrentSlide(fCurrentSlide < fSlides.count() - 1 ? fCurrentSlide + 1 : 0);
});
fCommands.addCommand(Window::Key::kLeft, "Left", "Navigation", "Previous slide", [this]() {
this->setCurrentSlide(fCurrentSlide > 0 ? fCurrentSlide - 1 : fSlides.count() - 1);
});
fCommands.addCommand(Window::Key::kUp, "Up", "Transform", "Zoom in", [this]() {
this->changeZoomLevel(1.f / 32.f);
fWindow->inval();
});
fCommands.addCommand(Window::Key::kDown, "Down", "Transform", "Zoom out", [this]() {
this->changeZoomLevel(-1.f / 32.f);
fWindow->inval();
});
fCommands.addCommand('d', "Modes", "Change rendering backend", [this]() {
sk_app::Window::BackendType newBackend = (sk_app::Window::BackendType)(
(fBackendType + 1) % sk_app::Window::kBackendTypeCount);
// Switching to and from Vulkan is problematic on Linux so disabled for now
#if defined(SK_BUILD_FOR_UNIX) && defined(SK_VULKAN)
if (newBackend == sk_app::Window::kVulkan_BackendType) {
newBackend = (sk_app::Window::BackendType)((newBackend + 1) %
sk_app::Window::kBackendTypeCount);
} else if (fBackendType == sk_app::Window::kVulkan_BackendType) {
newBackend = sk_app::Window::kVulkan_BackendType;
}
#endif
this->setBackend(newBackend);
});
fCommands.addCommand('K', "IO", "Save slide to SKP", [this]() {
fSaveToSKP = true;
fWindow->inval();
});
fCommands.addCommand('G', "Modes", "Geometry", [this]() {
DisplayParams params = fWindow->getRequestedDisplayParams();
uint32_t flags = params.fSurfaceProps.flags();
if (!fPixelGeometryOverrides) {
fPixelGeometryOverrides = true;
params.fSurfaceProps = SkSurfaceProps(flags, kUnknown_SkPixelGeometry);
} else {
switch (params.fSurfaceProps.pixelGeometry()) {
case kUnknown_SkPixelGeometry:
params.fSurfaceProps = SkSurfaceProps(flags, kRGB_H_SkPixelGeometry);
break;
case kRGB_H_SkPixelGeometry:
params.fSurfaceProps = SkSurfaceProps(flags, kBGR_H_SkPixelGeometry);
break;
case kBGR_H_SkPixelGeometry:
params.fSurfaceProps = SkSurfaceProps(flags, kRGB_V_SkPixelGeometry);
break;
case kRGB_V_SkPixelGeometry:
params.fSurfaceProps = SkSurfaceProps(flags, kBGR_V_SkPixelGeometry);
break;
case kBGR_V_SkPixelGeometry:
params.fSurfaceProps = SkSurfaceProps(flags, SkSurfaceProps::kLegacyFontHost_InitType);
fPixelGeometryOverrides = false;
break;
}
}
fWindow->setRequestedDisplayParams(params);
this->updateTitle();
fWindow->inval();
});
fCommands.addCommand('H', "Paint", "Hinting mode", [this]() {
if (!fPaintOverrides.fHinting) {
fPaintOverrides.fHinting = true;
fPaint.setHinting(SkPaint::kNo_Hinting);
} else {
switch (fPaint.getHinting()) {
case SkPaint::kNo_Hinting:
fPaint.setHinting(SkPaint::kSlight_Hinting);
break;
case SkPaint::kSlight_Hinting:
fPaint.setHinting(SkPaint::kNormal_Hinting);
break;
case SkPaint::kNormal_Hinting:
fPaint.setHinting(SkPaint::kFull_Hinting);
break;
case SkPaint::kFull_Hinting:
fPaint.setHinting(SkPaint::kNo_Hinting);
fPaintOverrides.fHinting = false;
break;
}
}
this->updateTitle();
fWindow->inval();
});
fCommands.addCommand('A', "Paint", "Antialias Mode", [this]() {
if (!(fPaintOverrides.fFlags & SkPaint::kAntiAlias_Flag)) {
fPaintOverrides.fAntiAlias = SkPaintFields::AntiAliasState::Alias;
fPaintOverrides.fFlags |= SkPaint::kAntiAlias_Flag;
fPaint.setAntiAlias(false);
gSkUseAnalyticAA = gSkForceAnalyticAA = false;
gSkUseDeltaAA = gSkForceDeltaAA = false;
} else {
fPaint.setAntiAlias(true);
switch (fPaintOverrides.fAntiAlias) {
case SkPaintFields::AntiAliasState::Alias:
fPaintOverrides.fAntiAlias = SkPaintFields::AntiAliasState::Normal;
gSkUseAnalyticAA = gSkForceAnalyticAA = false;
gSkUseDeltaAA = gSkForceDeltaAA = false;
break;
case SkPaintFields::AntiAliasState::Normal:
fPaintOverrides.fAntiAlias = SkPaintFields::AntiAliasState::AnalyticAAEnabled;
gSkUseAnalyticAA = true;
gSkForceAnalyticAA = false;
gSkUseDeltaAA = gSkForceDeltaAA = false;
break;
case SkPaintFields::AntiAliasState::AnalyticAAEnabled:
fPaintOverrides.fAntiAlias = SkPaintFields::AntiAliasState::AnalyticAAForced;
gSkUseAnalyticAA = gSkForceAnalyticAA = true;
gSkUseDeltaAA = gSkForceDeltaAA = false;
break;
case SkPaintFields::AntiAliasState::AnalyticAAForced:
fPaintOverrides.fAntiAlias = SkPaintFields::AntiAliasState::DeltaAAEnabled;
gSkUseAnalyticAA = gSkForceAnalyticAA = false;
gSkUseDeltaAA = true;
gSkForceDeltaAA = false;
break;
case SkPaintFields::AntiAliasState::DeltaAAEnabled:
fPaintOverrides.fAntiAlias = SkPaintFields::AntiAliasState::DeltaAAForced;
gSkUseAnalyticAA = gSkForceAnalyticAA = false;
gSkUseDeltaAA = gSkForceDeltaAA = true;
break;
case SkPaintFields::AntiAliasState::DeltaAAForced:
fPaintOverrides.fAntiAlias = SkPaintFields::AntiAliasState::Alias;
fPaintOverrides.fFlags &= ~SkPaint::kAntiAlias_Flag;
gSkUseAnalyticAA = fPaintOverrides.fOriginalSkUseAnalyticAA;
gSkForceAnalyticAA = fPaintOverrides.fOriginalSkForceAnalyticAA;
gSkUseDeltaAA = fPaintOverrides.fOriginalSkUseDeltaAA;
gSkForceDeltaAA = fPaintOverrides.fOriginalSkForceDeltaAA;
break;
}
}
this->updateTitle();
fWindow->inval();
});
fCommands.addCommand('D', "Modes", "DFT", [this]() {
DisplayParams params = fWindow->getRequestedDisplayParams();
uint32_t flags = params.fSurfaceProps.flags();
flags ^= SkSurfaceProps::kUseDeviceIndependentFonts_Flag;
params.fSurfaceProps = SkSurfaceProps(flags, params.fSurfaceProps.pixelGeometry());
fWindow->setRequestedDisplayParams(params);
this->updateTitle();
fWindow->inval();
});
fCommands.addCommand('L', "Paint", "Subpixel Antialias Mode", [this]() {
if (!(fPaintOverrides.fFlags & SkPaint::kLCDRenderText_Flag)) {
fPaintOverrides.fFlags |= SkPaint::kLCDRenderText_Flag;
fPaint.setLCDRenderText(false);
} else {
if (!fPaint.isLCDRenderText()) {
fPaint.setLCDRenderText(true);
} else {
fPaintOverrides.fFlags &= ~SkPaint::kLCDRenderText_Flag;
}
}
this->updateTitle();
fWindow->inval();
});
fCommands.addCommand('S', "Paint", "Subpixel Position Mode", [this]() {
if (!(fPaintOverrides.fFlags & SkPaint::kSubpixelText_Flag)) {
fPaintOverrides.fFlags |= SkPaint::kSubpixelText_Flag;
fPaint.setSubpixelText(false);
} else {
if (!fPaint.isSubpixelText()) {
fPaint.setSubpixelText(true);
} else {
fPaintOverrides.fFlags &= ~SkPaint::kSubpixelText_Flag;
}
}
this->updateTitle();
fWindow->inval();
});
fCommands.addCommand('p', "Transform", "Toggle Perspective Mode", [this]() {
fPerspectiveMode = (kPerspective_Real == fPerspectiveMode) ? kPerspective_Fake
: kPerspective_Real;
this->updateTitle();
fWindow->inval();
});
fCommands.addCommand('P', "Transform", "Toggle Perspective", [this]() {
fPerspectiveMode = (kPerspective_Off == fPerspectiveMode) ? kPerspective_Real
: kPerspective_Off;
this->updateTitle();
fWindow->inval();
});
fCommands.addCommand('u', "GUI", "Zoom UI", [this]() {
fZoomUI = !fZoomUI;
fStatsLayer.setDisplayScale(fZoomUI ? 2.0f : 1.0f);
fWindow->inval();
});
// set up slides
this->initSlides();
if (FLAGS_list) {
this->listNames();
}
fPerspectivePoints[0].set(0, 0);
fPerspectivePoints[1].set(1, 0);
fPerspectivePoints[2].set(0, 1);
fPerspectivePoints[3].set(1, 1);
fAnimTimer.run();
auto gamutImage = GetResourceAsImage("images/gamut.png");
if (gamutImage) {
fImGuiGamutPaint.setShader(gamutImage->makeShader());
}
fImGuiGamutPaint.setColor(SK_ColorWHITE);
fImGuiGamutPaint.setFilterQuality(kLow_SkFilterQuality);
fWindow->attach(backend_type_for_window(fBackendType));
this->setCurrentSlide(this->startupSlide());
}
void Viewer::initSlides() {
using SlideFactory = sk_sp<Slide>(*)(const SkString& name, const SkString& path);
static const struct {
const char* fExtension;
const char* fDirName;
const SkCommandLineFlags::StringArray& fFlags;
const SlideFactory fFactory;
} gExternalSlidesInfo[] = {
{ ".skp", "skp-dir", FLAGS_skps,
[](const SkString& name, const SkString& path) -> sk_sp<Slide> {
return sk_make_sp<SKPSlide>(name, path);}
},
{ ".jpg", "jpg-dir", FLAGS_jpgs,
[](const SkString& name, const SkString& path) -> sk_sp<Slide> {
return sk_make_sp<ImageSlide>(name, path);}
},
#if defined(SK_ENABLE_SKOTTIE)
{ ".json", "skottie-dir", FLAGS_lotties,
[](const SkString& name, const SkString& path) -> sk_sp<Slide> {
return sk_make_sp<SkottieSlide>(name, path);}
},
#endif
#if defined(SK_XML)
{ ".svg", "svg-dir", FLAGS_svgs,
[](const SkString& name, const SkString& path) -> sk_sp<Slide> {
return sk_make_sp<SvgSlide>(name, path);}
},
#endif
#if !(defined(SK_BUILD_FOR_WIN) && defined(__clang__))
{ ".nima", "nima-dir", FLAGS_nimas,
[](const SkString& name, const SkString& path) -> sk_sp<Slide> {
return sk_make_sp<NIMASlide>(name, path);}
},
#endif
};
SkTArray<sk_sp<Slide>> dirSlides;
const auto addSlide = [&](const SkString& name,
const SkString& path,
const SlideFactory& fact) {
if (SkCommandLineFlags::ShouldSkip(FLAGS_match, name.c_str())) {
return;
}
if (auto slide = fact(name, path)) {
dirSlides.push_back(slide);
fSlides.push_back(std::move(slide));
}
};
if (!FLAGS_file.isEmpty()) {
// single file mode
const SkString file(FLAGS_file[0]);
if (sk_exists(file.c_str(), kRead_SkFILE_Flag)) {
for (const auto& sinfo : gExternalSlidesInfo) {
if (file.endsWith(sinfo.fExtension)) {
addSlide(SkOSPath::Basename(file.c_str()), file, sinfo.fFactory);
return;
}
}
fprintf(stderr, "Unsupported file type \"%s\"\n", file.c_str());
} else {
fprintf(stderr, "Cannot read \"%s\"\n", file.c_str());
}
return;
}
// Bisect slide.
if (!FLAGS_bisect.isEmpty()) {
sk_sp<BisectSlide> bisect = BisectSlide::Create(FLAGS_bisect[0]);
if (bisect && !SkCommandLineFlags::ShouldSkip(FLAGS_match, bisect->getName().c_str())) {
if (FLAGS_bisect.count() >= 2) {
for (const char* ch = FLAGS_bisect[1]; *ch; ++ch) {
bisect->onChar(*ch);
}
}
fSlides.push_back(std::move(bisect));
}
}
// GMs
int firstGM = fSlides.count();
for (skiagm::GMFactory gmFactory : skiagm::GMRegistry::Range()) {
std::unique_ptr<skiagm::GM> gm(gmFactory(nullptr));
if (!SkCommandLineFlags::ShouldSkip(FLAGS_match, gm->getName())) {
sk_sp<Slide> slide(new GMSlide(gm.release()));
fSlides.push_back(std::move(slide));
}
}
// reverse gms
int numGMs = fSlides.count() - firstGM;
for (int i = 0; i < numGMs/2; ++i) {
std::swap(fSlides[firstGM + i], fSlides[fSlides.count() - i - 1]);
}
// samples
for (const SampleFactory factory : SampleRegistry::Range()) {
sk_sp<Slide> slide(new SampleSlide(factory));
if (!SkCommandLineFlags::ShouldSkip(FLAGS_match, slide->getName().c_str())) {
fSlides.push_back(slide);
}
}
for (const auto& info : gExternalSlidesInfo) {
for (const auto& flag : info.fFlags) {
if (SkStrEndsWith(flag.c_str(), info.fExtension)) {
// single file
addSlide(SkOSPath::Basename(flag.c_str()), flag, info.fFactory);
} else {
// directory
SkOSFile::Iter it(flag.c_str(), info.fExtension);
SkString name;
while (it.next(&name)) {
addSlide(name, SkOSPath::Join(flag.c_str(), name.c_str()), info.fFactory);
}
}
if (!dirSlides.empty()) {
fSlides.push_back(
sk_make_sp<SlideDir>(SkStringPrintf("%s[%s]", info.fDirName, flag.c_str()),
std::move(dirSlides)));
dirSlides.reset();
}
}
}
}
Viewer::~Viewer() {
fWindow->detach();
delete fWindow;
}
struct SkPaintTitleUpdater {
SkPaintTitleUpdater(SkString* title) : fTitle(title), fCount(0) {}
void append(const char* s) {
if (fCount == 0) {
fTitle->append(" {");
} else {
fTitle->append(", ");
}
fTitle->append(s);
++fCount;
}
void done() {
if (fCount > 0) {
fTitle->append("}");
}
}
SkString* fTitle;
int fCount;
};
void Viewer::updateTitle() {
if (!fWindow) {
return;
}
if (fWindow->sampleCount() < 1) {
return; // Surface hasn't been created yet.
}
SkString title("Viewer: ");
title.append(fSlides[fCurrentSlide]->getName());
if (gSkUseDeltaAA) {
if (gSkForceDeltaAA) {
title.append(" <FDAA>");
} else {
title.append(" <DAA>");
}
} else if (gSkUseAnalyticAA) {
if (gSkForceAnalyticAA) {
title.append(" <FAAA>");
} else {
title.append(" <AAA>");
}
}
SkPaintTitleUpdater paintTitle(&title);
auto paintFlag = [this, &paintTitle](SkPaint::Flags flag, bool (SkPaint::* isFlag)() const,
const char* on, const char* off)
{
if (fPaintOverrides.fFlags & flag) {
paintTitle.append((fPaint.*isFlag)() ? on : off);
}
};
paintFlag(SkPaint::kAntiAlias_Flag, &SkPaint::isAntiAlias, "Antialias", "Alias");
paintFlag(SkPaint::kDither_Flag, &SkPaint::isDither, "DITHER", "No Dither");
paintFlag(SkPaint::kFakeBoldText_Flag, &SkPaint::isFakeBoldText, "Fake Bold", "No Fake Bold");
paintFlag(SkPaint::kLinearText_Flag, &SkPaint::isLinearText, "Linear Text", "Non-Linear Text");
paintFlag(SkPaint::kSubpixelText_Flag, &SkPaint::isSubpixelText, "Subpixel Text", "Pixel Text");
paintFlag(SkPaint::kLCDRenderText_Flag, &SkPaint::isLCDRenderText, "LCD", "lcd");
paintFlag(SkPaint::kEmbeddedBitmapText_Flag, &SkPaint::isEmbeddedBitmapText,
"Bitmap Text", "No Bitmap Text");
paintFlag(SkPaint::kAutoHinting_Flag, &SkPaint::isAutohinted,
"Force Autohint", "No Force Autohint");
paintFlag(SkPaint::kVerticalText_Flag, &SkPaint::isVerticalText,
"Vertical Text", "No Vertical Text");
if (fPaintOverrides.fHinting) {
switch (fPaint.getHinting()) {
case SkPaint::kNo_Hinting:
paintTitle.append("No Hinting");
break;
case SkPaint::kSlight_Hinting:
paintTitle.append("Slight Hinting");
break;
case SkPaint::kNormal_Hinting:
paintTitle.append("Normal Hinting");
break;
case SkPaint::kFull_Hinting:
paintTitle.append("Full Hinting");
break;
}
}
paintTitle.done();
switch (fColorMode) {
case ColorMode::kLegacy:
title.append(" Legacy 8888");
break;
case ColorMode::kColorManagedSRGB8888_NonLinearBlending:
title.append(" ColorManaged 8888 (Nonlinear blending)");
break;
case ColorMode::kColorManagedSRGB8888:
title.append(" ColorManaged 8888");
break;
case ColorMode::kColorManagedLinearF16:
title.append(" ColorManaged F16");
break;
}
if (ColorMode::kLegacy != fColorMode) {
int curPrimaries = -1;
for (size_t i = 0; i < SK_ARRAY_COUNT(gNamedPrimaries); ++i) {
if (primaries_equal(*gNamedPrimaries[i].fPrimaries, fColorSpacePrimaries)) {
curPrimaries = i;
break;
}
}
title.appendf(" %s", curPrimaries >= 0 ? gNamedPrimaries[curPrimaries].fName : "Custom");
if (ColorMode::kColorManagedSRGB8888_NonLinearBlending == fColorMode) {
title.appendf(" Gamma %f", fColorSpaceTransferFn.fG);
}
}
const DisplayParams& params = fWindow->getRequestedDisplayParams();
if (fPixelGeometryOverrides) {
switch (params.fSurfaceProps.pixelGeometry()) {
case kUnknown_SkPixelGeometry:
title.append( " Flat");
break;
case kRGB_H_SkPixelGeometry:
title.append( " RGB");
break;
case kBGR_H_SkPixelGeometry:
title.append( " BGR");
break;
case kRGB_V_SkPixelGeometry:
title.append( " RGBV");
break;
case kBGR_V_SkPixelGeometry:
title.append( " BGRV");
break;
}
}
if (params.fSurfaceProps.isUseDeviceIndependentFonts()) {
title.append(" DFT");
}
title.append(" [");
title.append(kBackendTypeStrings[fBackendType]);
int msaa = fWindow->sampleCount();
if (msaa > 1) {
title.appendf(" MSAA: %i", msaa);
}
title.append("]");
GpuPathRenderers pr = fWindow->getRequestedDisplayParams().fGrContextOptions.fGpuPathRenderers;
if (GpuPathRenderers::kAll != pr) {
title.appendf(" [Path renderer: %s]", gPathRendererNames[pr].c_str());
}
if (kPerspective_Real == fPerspectiveMode) {
title.append(" Perpsective (Real)");
} else if (kPerspective_Fake == fPerspectiveMode) {
title.append(" Perspective (Fake)");
}
fWindow->setTitle(title.c_str());
}
int Viewer::startupSlide() const {
if (!FLAGS_slide.isEmpty()) {
int count = fSlides.count();
for (int i = 0; i < count; i++) {
if (fSlides[i]->getName().equals(FLAGS_slide[0])) {
return i;
}
}
fprintf(stderr, "Unknown slide \"%s\"\n", FLAGS_slide[0]);
this->listNames();
}
return 0;
}
void Viewer::listNames() const {
SkDebugf("All Slides:\n");
for (const auto& slide : fSlides) {
SkDebugf(" %s\n", slide->getName().c_str());
}
}
void Viewer::setCurrentSlide(int slide) {
SkASSERT(slide >= 0 && slide < fSlides.count());
if (slide == fCurrentSlide) {
return;
}
if (fCurrentSlide >= 0) {
fSlides[fCurrentSlide]->unload();
}
fSlides[slide]->load(SkIntToScalar(fWindow->width()),
SkIntToScalar(fWindow->height()));
fCurrentSlide = slide;
this->setupCurrentSlide();
}
void Viewer::setupCurrentSlide() {
if (fCurrentSlide >= 0) {
// prepare dimensions for image slides
fGesture.resetTouchState();
fDefaultMatrix.reset();
const SkISize slideSize = fSlides[fCurrentSlide]->getDimensions();
const SkRect slideBounds = SkRect::MakeIWH(slideSize.width(), slideSize.height());
const SkRect windowRect = SkRect::MakeIWH(fWindow->width(), fWindow->height());
// Start with a matrix that scales the slide to the available screen space
if (fWindow->scaleContentToFit()) {
if (windowRect.width() > 0 && windowRect.height() > 0) {
fDefaultMatrix.setRectToRect(slideBounds, windowRect, SkMatrix::kStart_ScaleToFit);
}
}
// Prevent the user from dragging content so far outside the window they can't find it again
fGesture.setTransLimit(slideBounds, windowRect, this->computePreTouchMatrix());
this->updateTitle();
this->updateUIState();
fStatsLayer.resetMeasurements();
fWindow->inval();
}
}
#define MAX_ZOOM_LEVEL 8
#define MIN_ZOOM_LEVEL -8
void Viewer::changeZoomLevel(float delta) {
fZoomLevel += delta;
fZoomLevel = SkScalarPin(fZoomLevel, MIN_ZOOM_LEVEL, MAX_ZOOM_LEVEL);
this->preTouchMatrixChanged();
}
void Viewer::preTouchMatrixChanged() {
// Update the trans limit as the transform changes.
const SkISize slideSize = fSlides[fCurrentSlide]->getDimensions();
const SkRect slideBounds = SkRect::MakeIWH(slideSize.width(), slideSize.height());
const SkRect windowRect = SkRect::MakeIWH(fWindow->width(), fWindow->height());
fGesture.setTransLimit(slideBounds, windowRect, this->computePreTouchMatrix());
}
SkMatrix Viewer::computePerspectiveMatrix() {
SkScalar w = fWindow->width(), h = fWindow->height();
SkPoint orthoPts[4] = { { 0, 0 }, { w, 0 }, { 0, h }, { w, h } };
SkPoint perspPts[4] = {
{ fPerspectivePoints[0].fX * w, fPerspectivePoints[0].fY * h },
{ fPerspectivePoints[1].fX * w, fPerspectivePoints[1].fY * h },
{ fPerspectivePoints[2].fX * w, fPerspectivePoints[2].fY * h },
{ fPerspectivePoints[3].fX * w, fPerspectivePoints[3].fY * h }
};
SkMatrix m;
m.setPolyToPoly(orthoPts, perspPts, 4);
return m;
}
SkMatrix Viewer::computePreTouchMatrix() {
SkMatrix m = fDefaultMatrix;
SkScalar zoomScale = (fZoomLevel < 0) ? SK_Scalar1 / (SK_Scalar1 - fZoomLevel)
: SK_Scalar1 + fZoomLevel;
m.preTranslate((fOffset.x() - 0.5f) * 2.0f, (fOffset.y() - 0.5f) * 2.0f);
m.preScale(zoomScale, zoomScale);
const SkISize slideSize = fSlides[fCurrentSlide]->getDimensions();
m.preRotate(fRotation, slideSize.width() * 0.5f, slideSize.height() * 0.5f);
if (kPerspective_Real == fPerspectiveMode) {
SkMatrix persp = this->computePerspectiveMatrix();
m.postConcat(persp);
}
return m;
}
SkMatrix Viewer::computeMatrix() {
SkMatrix m = fGesture.localM();
m.preConcat(fGesture.globalM());
m.preConcat(this->computePreTouchMatrix());
return m;
}
void Viewer::setBackend(sk_app::Window::BackendType backendType) {
fBackendType = backendType;
fWindow->detach();
#if defined(SK_BUILD_FOR_WIN)
// Switching between OpenGL, Vulkan, and ANGLE in the same window is problematic at this point
// on Windows, so we just delete the window and recreate it.
DisplayParams params = fWindow->getRequestedDisplayParams();
delete fWindow;
fWindow = Window::CreateNativeWindow(nullptr);
// re-register callbacks
fCommands.attach(fWindow);
fWindow->pushLayer(this);
fWindow->pushLayer(&fStatsLayer);
fWindow->pushLayer(&fImGuiLayer);
// Don't allow the window to re-attach. If we're in MSAA mode, the params we grabbed above
// will still include our correct sample count. But the re-created fWindow will lose that
// information. On Windows, we need to re-create the window when changing sample count,
// so we'll incorrectly detect that situation, then re-initialize the window in GL mode,
// rendering this tear-down step pointless (and causing the Vulkan window context to fail
// as if we had never changed windows at all).
fWindow->setRequestedDisplayParams(params, false);
#endif
fWindow->attach(backend_type_for_window(fBackendType));
}
void Viewer::setColorMode(ColorMode colorMode) {
fColorMode = colorMode;
// When we're in color managed mode, we tag our window surface as sRGB. If we've switched into
// or out of legacy/nonlinear mode, we need to update our window configuration.
DisplayParams params = fWindow->getRequestedDisplayParams();
bool wasInLegacy = !SkToBool(params.fColorSpace);
bool wantLegacy = (ColorMode::kLegacy == fColorMode) ||
(ColorMode::kColorManagedSRGB8888_NonLinearBlending == fColorMode);
if (wasInLegacy != wantLegacy) {
params.fColorSpace = wantLegacy ? nullptr : SkColorSpace::MakeSRGB();
fWindow->setRequestedDisplayParams(params);
}
this->updateTitle();
fWindow->inval();
}
class OveridePaintFilterCanvas : public SkPaintFilterCanvas {
public:
OveridePaintFilterCanvas(SkCanvas* canvas, SkPaint* paint, Viewer::SkPaintFields* fields)
: SkPaintFilterCanvas(canvas), fPaint(paint), fPaintOverrides(fields)
{ }
const SkTextBlob* filterTextBlob(const SkPaint& paint, const SkTextBlob* blob,
sk_sp<SkTextBlob>* cache) {
bool blobWillChange = false;
for (SkTextBlobRunIterator it(blob); !it.done(); it.next()) {
SkPaint blobPaint = paint;
it.applyFontToPaint(&blobPaint);
SkTCopyOnFirstWrite<SkPaint> filteredPaint(blobPaint);
bool shouldDraw = this->onFilter(&filteredPaint, kTextBlob_Type);
if (blobPaint != *filteredPaint || !shouldDraw) {
blobWillChange = true;
break;
}
}
if (!blobWillChange) {
return blob;
}
SkTextBlobBuilder builder;
for (SkTextBlobRunIterator it(blob); !it.done(); it.next()) {
SkPaint blobPaint = paint;
it.applyFontToPaint(&blobPaint);
SkTCopyOnFirstWrite<SkPaint> filteredPaint(blobPaint);
bool shouldDraw = this->onFilter(&filteredPaint, kTextBlob_Type);
if (!shouldDraw) {
continue;
}
const SkTextBlobBuilder::RunBuffer& runBuffer
= it.positioning() == SkTextBlobRunIterator::kDefault_Positioning
? SkTextBlobBuilderPriv::AllocRunText(&builder, *filteredPaint,
it.offset().x(),it.offset().y(), it.glyphCount(), it.textSize(), SkString())
: it.positioning() == SkTextBlobRunIterator::kHorizontal_Positioning
? SkTextBlobBuilderPriv::AllocRunTextPosH(&builder, *filteredPaint,
it.offset().y(), it.glyphCount(), it.textSize(), SkString())
: it.positioning() == SkTextBlobRunIterator::kFull_Positioning
? SkTextBlobBuilderPriv::AllocRunTextPos(&builder, *filteredPaint,
it.glyphCount(), it.textSize(), SkString())
: (SkASSERT_RELEASE(false), SkTextBlobBuilder::RunBuffer());
uint32_t glyphCount = it.glyphCount();
if (it.glyphs()) {
size_t glyphSize = sizeof(decltype(*it.glyphs()));
memcpy(runBuffer.glyphs, it.glyphs(), glyphCount * glyphSize);
}
if (it.pos()) {
size_t posSize = sizeof(decltype(*it.pos()));
uint8_t positioning = it.positioning();
memcpy(runBuffer.pos, it.pos(), glyphCount * positioning * posSize);
}
if (it.text()) {
size_t textSize = sizeof(decltype(*it.text()));
uint32_t textCount = it.textSize();
memcpy(runBuffer.utf8text, it.text(), textCount * textSize);
}
if (it.clusters()) {
size_t clusterSize = sizeof(decltype(*it.clusters()));
memcpy(runBuffer.clusters, it.clusters(), glyphCount * clusterSize);
}
}
*cache = builder.make();
return cache->get();
}
void onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
const SkPaint& paint) override {
sk_sp<SkTextBlob> cache;
this->SkPaintFilterCanvas::onDrawTextBlob(
this->filterTextBlob(paint, blob, &cache), x, y, paint);
}
bool onFilter(SkTCopyOnFirstWrite<SkPaint>* paint, Type) const override {
if (*paint == nullptr) {
return true;
}
if (fPaintOverrides->fTextSize) {
paint->writable()->setTextSize(fPaint->getTextSize());
}
if (fPaintOverrides->fHinting) {
paint->writable()->setHinting(fPaint->getHinting());
}
if (fPaintOverrides->fFlags & SkPaint::kAntiAlias_Flag) {
paint->writable()->setAntiAlias(fPaint->isAntiAlias());
}
if (fPaintOverrides->fFlags & SkPaint::kDither_Flag) {
paint->writable()->setDither(fPaint->isDither());
}
if (fPaintOverrides->fFlags & SkPaint::kFakeBoldText_Flag) {
paint->writable()->setFakeBoldText(fPaint->isFakeBoldText());
}
if (fPaintOverrides->fFlags & SkPaint::kLinearText_Flag) {
paint->writable()->setLinearText(fPaint->isLinearText());
}
if (fPaintOverrides->fFlags & SkPaint::kSubpixelText_Flag) {
paint->writable()->setSubpixelText(fPaint->isSubpixelText());
}
if (fPaintOverrides->fFlags & SkPaint::kLCDRenderText_Flag) {
paint->writable()->setLCDRenderText(fPaint->isLCDRenderText());
}
if (fPaintOverrides->fFlags & SkPaint::kEmbeddedBitmapText_Flag) {
paint->writable()->setEmbeddedBitmapText(fPaint->isEmbeddedBitmapText());
}
if (fPaintOverrides->fFlags & SkPaint::kAutoHinting_Flag) {
paint->writable()->setAutohinted(fPaint->isAutohinted());
}
if (fPaintOverrides->fFlags & SkPaint::kVerticalText_Flag) {
paint->writable()->setVerticalText(fPaint->isVerticalText());
}
return true;
}
SkPaint* fPaint;
Viewer::SkPaintFields* fPaintOverrides;
};
void Viewer::drawSlide(SkCanvas* canvas) {
SkAutoCanvasRestore autorestore(canvas, false);
// By default, we render directly into the window's surface/canvas
SkCanvas* slideCanvas = canvas;
fLastImage.reset();
// If we're in any of the color managed modes, construct the color space we're going to use
sk_sp<SkColorSpace> cs = nullptr;
if (ColorMode::kLegacy != fColorMode) {
auto transferFn = (ColorMode::kColorManagedLinearF16 == fColorMode)
? SkColorSpace::kLinear_RenderTargetGamma : SkColorSpace::kSRGB_RenderTargetGamma;
SkMatrix44 toXYZ;
SkAssertResult(fColorSpacePrimaries.toXYZD50(&toXYZ));
if (ColorMode::kColorManagedSRGB8888_NonLinearBlending == fColorMode) {
cs = SkColorSpace::MakeRGB(fColorSpaceTransferFn, toXYZ);
} else {
cs = SkColorSpace::MakeRGB(transferFn, toXYZ);
}
}
if (fSaveToSKP) {
SkPictureRecorder recorder;
SkCanvas* recorderCanvas = recorder.beginRecording(
SkRect::Make(fSlides[fCurrentSlide]->getDimensions()));
// In xform-canvas mode, record the transformed output
std::unique_ptr<SkCanvas> xformCanvas = nullptr;
if (ColorMode::kColorManagedSRGB8888_NonLinearBlending == fColorMode) {
xformCanvas = SkCreateColorSpaceXformCanvas(recorderCanvas, cs);
recorderCanvas = xformCanvas.get();
}
fSlides[fCurrentSlide]->draw(recorderCanvas);
sk_sp<SkPicture> picture(recorder.finishRecordingAsPicture());
SkFILEWStream stream("sample_app.skp");
picture->serialize(&stream);
fSaveToSKP = false;
}
// If we're in F16, or we're zooming, or we're in color correct 8888 and the gamut isn't sRGB,
// we need to render offscreen. We also need to render offscreen if we're in any raster mode,
// because the window surface is actually GL, or we're doing fake perspective.
sk_sp<SkSurface> offscreenSurface = nullptr;
std::unique_ptr<SkCanvas> threadedCanvas;
if (Window::kRaster_BackendType == fBackendType ||
kPerspective_Fake == fPerspectiveMode ||
ColorMode::kColorManagedLinearF16 == fColorMode ||
fShowZoomWindow ||
(ColorMode::kColorManagedSRGB8888 == fColorMode &&
!primaries_equal(fColorSpacePrimaries, gSrgbPrimaries))) {
SkColorType colorType = (ColorMode::kColorManagedLinearF16 == fColorMode)
? kRGBA_F16_SkColorType : kN32_SkColorType;
// In nonlinear blending mode, we actually use a legacy off-screen canvas, and wrap it
// with a special canvas (below) that has the color space attached
sk_sp<SkColorSpace> offscreenColorSpace =
(ColorMode::kColorManagedSRGB8888_NonLinearBlending == fColorMode) ? nullptr : cs;
SkImageInfo info = SkImageInfo::Make(fWindow->width(), fWindow->height(), colorType,
kPremul_SkAlphaType, std::move(offscreenColorSpace));
SkSurfaceProps props(SkSurfaceProps::kLegacyFontHost_InitType);
canvas->getProps(&props);
offscreenSurface = Window::kRaster_BackendType == fBackendType
? SkSurface::MakeRaster(info, &props)
: canvas->makeSurface(info);
SkPixmap offscreenPixmap;
slideCanvas = offscreenSurface->getCanvas();
}
std::unique_ptr<SkCanvas> xformCanvas = nullptr;
if (ColorMode::kColorManagedSRGB8888_NonLinearBlending == fColorMode) {
xformCanvas = SkCreateColorSpaceXformCanvas(slideCanvas, cs);
slideCanvas = xformCanvas.get();
}
int count = slideCanvas->save();
slideCanvas->clear(SK_ColorWHITE);
slideCanvas->concat(computeMatrix());
if (kPerspective_Real == fPerspectiveMode) {
slideCanvas->clipRect(SkRect::MakeWH(fWindow->width(), fWindow->height()));
}
// Time the painting logic of the slide
fStatsLayer.beginTiming(fPaintTimer);
OveridePaintFilterCanvas filterCanvas(slideCanvas, &fPaint, &fPaintOverrides);
fSlides[fCurrentSlide]->draw(&filterCanvas);
fStatsLayer.endTiming(fPaintTimer);
slideCanvas->restoreToCount(count);
// Force a flush so we can time that, too
fStatsLayer.beginTiming(fFlushTimer);
slideCanvas->flush();
fStatsLayer.endTiming(fFlushTimer);
// If we rendered offscreen, snap an image and push the results to the window's canvas
if (offscreenSurface) {
fLastImage = offscreenSurface->makeImageSnapshot();
// Tag the image with the sRGB gamut, so no further color space conversion happens
sk_sp<SkColorSpace> srgb = (ColorMode::kColorManagedLinearF16 == fColorMode)
? SkColorSpace::MakeSRGBLinear() : SkColorSpace::MakeSRGB();
auto retaggedImage = SkImageMakeRasterCopyAndAssignColorSpace(fLastImage.get(), srgb.get());
SkPaint paint;
paint.setBlendMode(SkBlendMode::kSrc);
int prePerspectiveCount = canvas->save();
if (kPerspective_Fake == fPerspectiveMode) {
paint.setFilterQuality(kHigh_SkFilterQuality);
canvas->clear(SK_ColorWHITE);
canvas->concat(this->computePerspectiveMatrix());
}
canvas->drawImage(retaggedImage, 0, 0, &paint);
canvas->restoreToCount(prePerspectiveCount);
}
}
void Viewer::onBackendCreated() {
this->setupCurrentSlide();
fWindow->show();
}
void Viewer::onPaint(SkCanvas* canvas) {
this->drawSlide(canvas);
fCommands.drawHelp(canvas);
this->drawImGui();
}
void Viewer::onResize(int width, int height) {
if (fCurrentSlide >= 0) {
fSlides[fCurrentSlide]->resize(width, height);
}
}
SkPoint Viewer::mapEvent(float x, float y) {
const auto m = this->computeMatrix();
SkMatrix inv;
SkAssertResult(m.invert(&inv));
return inv.mapXY(x, y);
}
bool Viewer::onTouch(intptr_t owner, Window::InputState state, float x, float y) {
if (GestureDevice::kMouse == fGestureDevice) {
return false;
}
const auto slidePt = this->mapEvent(x, y);
if (fSlides[fCurrentSlide]->onMouse(slidePt.x(), slidePt.y(), state, 0)) {
fWindow->inval();
return true;
}
void* castedOwner = reinterpret_cast<void*>(owner);
switch (state) {
case Window::kUp_InputState: {
fGesture.touchEnd(castedOwner);
#if defined(SK_BUILD_FOR_IOS)
// TODO: move IOS swipe detection higher up into the platform code
SkPoint dir;
if (fGesture.isFling(&dir)) {
// swiping left or right
if (SkTAbs(dir.fX) > SkTAbs(dir.fY)) {
if (dir.fX < 0) {
this->setCurrentSlide(fCurrentSlide < fSlides.count() - 1 ?
fCurrentSlide + 1 : 0);
} else {
this->setCurrentSlide(fCurrentSlide > 0 ?
fCurrentSlide - 1 : fSlides.count() - 1);
}
}
fGesture.reset();
}
#endif
break;
}
case Window::kDown_InputState: {
fGesture.touchBegin(castedOwner, x, y);
break;
}
case Window::kMove_InputState: {
fGesture.touchMoved(castedOwner, x, y);
break;
}
}
fGestureDevice = fGesture.isBeingTouched() ? GestureDevice::kTouch : GestureDevice::kNone;
fWindow->inval();
return true;
}
bool Viewer::onMouse(int x, int y, Window::InputState state, uint32_t modifiers) {
if (GestureDevice::kTouch == fGestureDevice) {
return false;
}
const auto slidePt = this->mapEvent(x, y);
if (fSlides[fCurrentSlide]->onMouse(slidePt.x(), slidePt.y(), state, modifiers)) {
fWindow->inval();
return true;
}
switch (state) {
case Window::kUp_InputState: {
fGesture.touchEnd(nullptr);
break;
}
case Window::kDown_InputState: {
fGesture.touchBegin(nullptr, x, y);
break;
}
case Window::kMove_InputState: {
fGesture.touchMoved(nullptr, x, y);
break;
}
}
fGestureDevice = fGesture.isBeingTouched() ? GestureDevice::kMouse : GestureDevice::kNone;
if (state != Window::kMove_InputState || fGesture.isBeingTouched()) {
fWindow->inval();
}
return true;
}
static ImVec2 ImGui_DragPrimary(const char* label, float* x, float* y,
const ImVec2& pos, const ImVec2& size) {
// Transform primaries ([0, 0] - [0.8, 0.9]) to screen coords (including Y-flip)
ImVec2 center(pos.x + (*x / 0.8f) * size.x, pos.y + (1.0f - (*y / 0.9f)) * size.y);
// Invisible 10x10 button
ImGui::SetCursorScreenPos(ImVec2(center.x - 5, center.y - 5));
ImGui::InvisibleButton(label, ImVec2(10, 10));
if (ImGui::IsItemActive() && ImGui::IsMouseDragging()) {
ImGuiIO& io = ImGui::GetIO();
// Normalized mouse position, relative to our gamut box
ImVec2 mousePosXY((io.MousePos.x - pos.x) / size.x, (io.MousePos.y - pos.y) / size.y);
// Clamp to edge of box, convert back to primary scale
*x = SkTPin(mousePosXY.x, 0.0f, 1.0f) * 0.8f;
*y = SkTPin(1 - mousePosXY.y, 0.0f, 1.0f) * 0.9f;
}
if (ImGui::IsItemHovered()) {
ImGui::SetTooltip("x: %.3f\ny: %.3f", *x, *y);
}
// Return screen coordinates for the caller. We could just return center here, but we'd have
// one frame of lag during drag.
return ImVec2(pos.x + (*x / 0.8f) * size.x, pos.y + (1.0f - (*y / 0.9f)) * size.y);
}
static void ImGui_Primaries(SkColorSpacePrimaries* primaries, SkPaint* gamutPaint) {
ImDrawList* drawList = ImGui::GetWindowDrawList();
// The gamut image covers a (0.8 x 0.9) shaped region, so fit our image/canvas to the available
// width, and scale the height to maintain aspect ratio.
float canvasWidth = SkTMax(ImGui::GetContentRegionAvailWidth(), 50.0f);
ImVec2 size = ImVec2(canvasWidth, canvasWidth * (0.9f / 0.8f));
ImVec2 pos = ImGui::GetCursorScreenPos();
// Background image. Only draw a subset of the image, to avoid the regions less than zero.
// Simplifes re-mapping math, clipping behavior, and increases resolution in the useful area.
// Magic numbers are pixel locations of the origin and upper-right corner.
drawList->AddImage(gamutPaint, pos, ImVec2(pos.x + size.x, pos.y + size.y),
ImVec2(242, 61), ImVec2(1897, 1922));
// Primary markers
ImVec2 r = ImGui_DragPrimary("R", &primaries->fRX, &primaries->fRY, pos, size);
ImVec2 g = ImGui_DragPrimary("G", &primaries->fGX, &primaries->fGY, pos, size);
ImVec2 b = ImGui_DragPrimary("B", &primaries->fBX, &primaries->fBY, pos, size);
ImVec2 w = ImGui_DragPrimary("W", &primaries->fWX, &primaries->fWY, pos, size);
// Gamut triangle
drawList->AddCircle(r, 5.0f, 0xFF000040);
drawList->AddCircle(g, 5.0f, 0xFF004000);
drawList->AddCircle(b, 5.0f, 0xFF400000);
drawList->AddCircle(w, 5.0f, 0xFFFFFFFF);
drawList->AddTriangle(r, g, b, 0xFFFFFFFF);
// Re-position cursor immediate after the diagram for subsequent controls
ImGui::SetCursorScreenPos(ImVec2(pos.x, pos.y + size.y));
}
static ImVec2 ImGui_DragPoint(const char* label, SkPoint* p,
const ImVec2& pos, const ImVec2& size, bool* dragging) {
// Transform points ([0, 0] - [1.0, 1.0]) to screen coords
ImVec2 center(pos.x + p->fX * size.x, pos.y + p->fY * size.y);
// Invisible 10x10 button
ImGui::SetCursorScreenPos(ImVec2(center.x - 5, center.y - 5));
ImGui::InvisibleButton(label, ImVec2(10, 10));
if (ImGui::IsItemActive() && ImGui::IsMouseDragging()) {
ImGuiIO& io = ImGui::GetIO();
// Normalized mouse position, relative to our gamut box
ImVec2 mousePosXY((io.MousePos.x - pos.x) / size.x, (io.MousePos.y - pos.y) / size.y);
// Clamp to edge of box
p->fX = SkTPin(mousePosXY.x, 0.0f, 1.0f);
p->fY = SkTPin(mousePosXY.y, 0.0f, 1.0f);
*dragging = true;
}
// Return screen coordinates for the caller. We could just return center here, but we'd have
// one frame of lag during drag.
return ImVec2(pos.x + p->fX * size.x, pos.y + p->fY * size.y);
}
static bool ImGui_DragLocation(SkPoint* pt) {
ImDrawList* drawList = ImGui::GetWindowDrawList();
// Fit our image/canvas to the available width, and scale the height to maintain aspect ratio.
float canvasWidth = SkTMax(ImGui::GetContentRegionAvailWidth(), 50.0f);
ImVec2 size = ImVec2(canvasWidth, canvasWidth);
ImVec2 pos = ImGui::GetCursorScreenPos();
// Background rectangle
drawList->AddRectFilled(pos, ImVec2(pos.x + size.x, pos.y + size.y), IM_COL32(0, 0, 0, 128));
// Location marker
bool dragging = false;
ImVec2 tl = ImGui_DragPoint("SL", pt + 0, pos, size, &dragging);
drawList->AddCircle(tl, 5.0f, 0xFFFFFFFF);
ImGui::SetCursorScreenPos(ImVec2(pos.x, pos.y + size.y));
ImGui::Spacing();
return dragging;
}
static bool ImGui_DragQuad(SkPoint* pts) {
ImDrawList* drawList = ImGui::GetWindowDrawList();
// Fit our image/canvas to the available width, and scale the height to maintain aspect ratio.
float canvasWidth = SkTMax(ImGui::GetContentRegionAvailWidth(), 50.0f);
ImVec2 size = ImVec2(canvasWidth, canvasWidth);
ImVec2 pos = ImGui::GetCursorScreenPos();
// Background rectangle
drawList->AddRectFilled(pos, ImVec2(pos.x + size.x, pos.y + size.y), IM_COL32(0, 0, 0, 128));
// Corner markers
bool dragging = false;
ImVec2 tl = ImGui_DragPoint("TL", pts + 0, pos, size, &dragging);
ImVec2 tr = ImGui_DragPoint("TR", pts + 1, pos, size, &dragging);
ImVec2 bl = ImGui_DragPoint("BL", pts + 2, pos, size, &dragging);
ImVec2 br = ImGui_DragPoint("BR", pts + 3, pos, size, &dragging);
// Draw markers and quad
drawList->AddCircle(tl, 5.0f, 0xFFFFFFFF);
drawList->AddCircle(tr, 5.0f, 0xFFFFFFFF);
drawList->AddCircle(bl, 5.0f, 0xFFFFFFFF);
drawList->AddCircle(br, 5.0f, 0xFFFFFFFF);
drawList->AddLine(tl, tr, 0xFFFFFFFF);
drawList->AddLine(tr, br, 0xFFFFFFFF);
drawList->AddLine(br, bl, 0xFFFFFFFF);
drawList->AddLine(bl, tl, 0xFFFFFFFF);
ImGui::SetCursorScreenPos(ImVec2(pos.x, pos.y + size.y));
ImGui::Spacing();
return dragging;
}
void Viewer::drawImGui() {
// Support drawing the ImGui demo window. Superfluous, but gives a good idea of what's possible
if (fShowImGuiTestWindow) {
ImGui::ShowDemoWindow(&fShowImGuiTestWindow);
}
if (fShowImGuiDebugWindow) {
// We have some dynamic content that sizes to fill available size. If the scroll bar isn't
// always visible, we can end up in a layout feedback loop.
ImGui::SetNextWindowSize(ImVec2(400, 400), ImGuiCond_FirstUseEver);
DisplayParams params = fWindow->getRequestedDisplayParams();
bool paramsChanged = false;
if (ImGui::Begin("Tools", &fShowImGuiDebugWindow,
ImGuiWindowFlags_AlwaysVerticalScrollbar)) {
if (ImGui::CollapsingHeader("Backend")) {
int newBackend = static_cast<int>(fBackendType);
ImGui::RadioButton("Raster", &newBackend, sk_app::Window::kRaster_BackendType);
ImGui::SameLine();
ImGui::RadioButton("OpenGL", &newBackend, sk_app::Window::kNativeGL_BackendType);
#if SK_ANGLE && defined(SK_BUILD_FOR_WIN)
ImGui::SameLine();
ImGui::RadioButton("ANGLE", &newBackend, sk_app::Window::kANGLE_BackendType);
#endif
#if defined(SK_VULKAN)
ImGui::SameLine();
ImGui::RadioButton("Vulkan", &newBackend, sk_app::Window::kVulkan_BackendType);
#endif
if (newBackend != fBackendType) {
fDeferredActions.push_back([=]() {
this->setBackend(static_cast<sk_app::Window::BackendType>(newBackend));
});
}
const GrContext* ctx = fWindow->getGrContext();
bool* wire = &params.fGrContextOptions.fWireframeMode;
if (ctx && ImGui::Checkbox("Wireframe Mode", wire)) {
paramsChanged = true;
}
if (ctx) {
int sampleCount = fWindow->sampleCount();
ImGui::Text("MSAA: "); ImGui::SameLine();
ImGui::RadioButton("1", &sampleCount, 1); ImGui::SameLine();
ImGui::RadioButton("4", &sampleCount, 4); ImGui::SameLine();
ImGui::RadioButton("8", &sampleCount, 8); ImGui::SameLine();
ImGui::RadioButton("16", &sampleCount, 16);
if (sampleCount != params.fMSAASampleCount) {
params.fMSAASampleCount = sampleCount;
paramsChanged = true;
}
}
int pixelGeometryIdx = 0;
if (fPixelGeometryOverrides) {
pixelGeometryIdx = params.fSurfaceProps.pixelGeometry() + 1;
}
if (ImGui::Combo("Pixel Geometry", &pixelGeometryIdx,
"Default\0Flat\0RGB\0BGR\0RGBV\0BGRV\0\0"))
{
uint32_t flags = params.fSurfaceProps.flags();
if (pixelGeometryIdx == 0) {
fPixelGeometryOverrides = false;
params.fSurfaceProps = SkSurfaceProps(flags, SkSurfaceProps::kLegacyFontHost_InitType);
} else {
fPixelGeometryOverrides = true;
SkPixelGeometry pixelGeometry = SkTo<SkPixelGeometry>(pixelGeometryIdx - 1);
params.fSurfaceProps = SkSurfaceProps(flags, pixelGeometry);
}
paramsChanged = true;
}
bool useDFT = params.fSurfaceProps.isUseDeviceIndependentFonts();
if (ImGui::Checkbox("DFT", &useDFT)) {
uint32_t flags = params.fSurfaceProps.flags();
if (useDFT) {
flags |= SkSurfaceProps::kUseDeviceIndependentFonts_Flag;
} else {
flags &= ~SkSurfaceProps::kUseDeviceIndependentFonts_Flag;
}
SkPixelGeometry pixelGeometry = params.fSurfaceProps.pixelGeometry();
params.fSurfaceProps = SkSurfaceProps(flags, pixelGeometry);
paramsChanged = true;
}
if (ImGui::TreeNode("Path Renderers")) {
GpuPathRenderers prevPr = params.fGrContextOptions.fGpuPathRenderers;
auto prButton = [&](GpuPathRenderers x) {
if (ImGui::RadioButton(gPathRendererNames[x].c_str(), prevPr == x)) {
if (x != params.fGrContextOptions.fGpuPathRenderers) {
params.fGrContextOptions.fGpuPathRenderers = x;
paramsChanged = true;
}
}
};
if (!ctx) {
ImGui::RadioButton("Software", true);
} else if (fWindow->sampleCount() > 1) {
prButton(GpuPathRenderers::kAll);
if (ctx->contextPriv().caps()->shaderCaps()->pathRenderingSupport()) {
prButton(GpuPathRenderers::kStencilAndCover);
}
prButton(GpuPathRenderers::kTessellating);
prButton(GpuPathRenderers::kNone);
} else {
prButton(GpuPathRenderers::kAll);
if (GrCoverageCountingPathRenderer::IsSupported(
*ctx->contextPriv().caps())) {
prButton(GpuPathRenderers::kCoverageCounting);
}
prButton(GpuPathRenderers::kSmall);
prButton(GpuPathRenderers::kTessellating);
prButton(GpuPathRenderers::kNone);
}
ImGui::TreePop();
}
}
if (ImGui::CollapsingHeader("Transform")) {
float zoom = fZoomLevel;
if (ImGui::SliderFloat("Zoom", &zoom, MIN_ZOOM_LEVEL, MAX_ZOOM_LEVEL)) {
fZoomLevel = zoom;
this->preTouchMatrixChanged();
paramsChanged = true;
}
float deg = fRotation;
if (ImGui::SliderFloat("Rotate", &deg, -30, 360, "%.3f deg")) {
fRotation = deg;
this->preTouchMatrixChanged();
paramsChanged = true;
}
if (ImGui::CollapsingHeader("Subpixel offset", ImGuiTreeNodeFlags_NoTreePushOnOpen)) {
if (ImGui_DragLocation(&fOffset)) {
this->preTouchMatrixChanged();
paramsChanged = true;
}
} else if (fOffset != SkVector{0.5f, 0.5f}) {
this->preTouchMatrixChanged();
paramsChanged = true;
fOffset = {0.5f, 0.5f};
}
int perspectiveMode = static_cast<int>(fPerspectiveMode);
if (ImGui::Combo("Perspective", &perspectiveMode, "Off\0Real\0Fake\0\0")) {
fPerspectiveMode = static_cast<PerspectiveMode>(perspectiveMode);
this->preTouchMatrixChanged();
paramsChanged = true;
}
if (perspectiveMode != kPerspective_Off && ImGui_DragQuad(fPerspectivePoints)) {
this->preTouchMatrixChanged();
paramsChanged = true;
}
}
if (ImGui::CollapsingHeader("Paint")) {
int hintingIdx = 0;
if (fPaintOverrides.fHinting) {
hintingIdx = fPaint.getHinting() + 1;
}
if (ImGui::Combo("Hinting", &hintingIdx,
"Default\0None\0Slight\0Normal\0Full\0\0"))
{
if (hintingIdx == 0) {
fPaintOverrides.fHinting = false;
fPaint.setHinting(SkPaint::kNo_Hinting);
} else {
fPaintOverrides.fHinting = true;
SkPaint::Hinting hinting = SkTo<SkPaint::Hinting>(hintingIdx - 1);
fPaint.setHinting(hinting);
}
paramsChanged = true;
}
int aliasIdx = 0;
if (fPaintOverrides.fFlags & SkPaint::kAntiAlias_Flag) {
aliasIdx = SkTo<int>(fPaintOverrides.fAntiAlias) + 1;
}
if (ImGui::Combo("Anti-Alias", &aliasIdx,
"Default\0Alias\0Normal\0AnalyticAAEnabled\0AnalyticAAForced\0"
"DeltaAAEnabled\0DeltaAAForced\0\0"))
{
gSkUseAnalyticAA = fPaintOverrides.fOriginalSkUseAnalyticAA;
gSkForceAnalyticAA = fPaintOverrides.fOriginalSkForceAnalyticAA;
gSkUseDeltaAA = fPaintOverrides.fOriginalSkUseDeltaAA;
gSkForceDeltaAA = fPaintOverrides.fOriginalSkForceDeltaAA;
if (aliasIdx == 0) {
fPaintOverrides.fAntiAlias = SkPaintFields::AntiAliasState::Alias;
fPaintOverrides.fFlags &= ~SkPaint::kAntiAlias_Flag;
} else {
fPaintOverrides.fFlags |= SkPaint::kAntiAlias_Flag;
fPaintOverrides.fAntiAlias =SkTo<SkPaintFields::AntiAliasState>(aliasIdx-1);
fPaint.setAntiAlias(aliasIdx > 1);
switch (fPaintOverrides.fAntiAlias) {
case SkPaintFields::AntiAliasState::Alias:
break;
case SkPaintFields::AntiAliasState::Normal:
break;
case SkPaintFields::AntiAliasState::AnalyticAAEnabled:
gSkUseAnalyticAA = true;
gSkForceAnalyticAA = false;
gSkUseDeltaAA = gSkForceDeltaAA = false;
break;
case SkPaintFields::AntiAliasState::AnalyticAAForced:
gSkUseAnalyticAA = gSkForceAnalyticAA = true;
gSkUseDeltaAA = gSkForceDeltaAA = false;
break;
case SkPaintFields::AntiAliasState::DeltaAAEnabled:
gSkUseAnalyticAA = gSkForceAnalyticAA = false;
gSkUseDeltaAA = true;
gSkForceDeltaAA = false;
break;
case SkPaintFields::AntiAliasState::DeltaAAForced:
gSkUseAnalyticAA = gSkForceAnalyticAA = false;
gSkUseDeltaAA = gSkForceDeltaAA = true;
break;
}
}
paramsChanged = true;
}
auto paintFlag = [this, &paramsChanged](const char* label, const char* items,
SkPaint::Flags flag,
bool (SkPaint::* isFlag)() const,
void (SkPaint::* setFlag)(bool) )
{
int itemIndex = 0;
if (fPaintOverrides.fFlags & flag) {
itemIndex = (fPaint.*isFlag)() ? 2 : 1;
}
if (ImGui::Combo(label, &itemIndex, items)) {
if (itemIndex == 0) {
fPaintOverrides.fFlags &= ~flag;
} else {
fPaintOverrides.fFlags |= flag;
(fPaint.*setFlag)(itemIndex == 2);
}
paramsChanged = true;
}
};
paintFlag("Dither",
"Default\0No Dither\0Dither\0\0",
SkPaint::kDither_Flag,
&SkPaint::isDither, &SkPaint::setDither);
paintFlag("Fake Bold Glyphs",
"Default\0No Fake Bold\0Fake Bold\0\0",
SkPaint::kFakeBoldText_Flag,
&SkPaint::isFakeBoldText, &SkPaint::setFakeBoldText);
paintFlag("Linear Text",
"Default\0No Linear Text\0Linear Text\0\0",
SkPaint::kLinearText_Flag,
&SkPaint::isLinearText, &SkPaint::setLinearText);
paintFlag("Subpixel Position Glyphs",
"Default\0Pixel Text\0Subpixel Text\0\0",
SkPaint::kSubpixelText_Flag,
&SkPaint::isSubpixelText, &SkPaint::setSubpixelText);
paintFlag("Subpixel Anti-Alias",
"Default\0lcd\0LCD\0\0",
SkPaint::kLCDRenderText_Flag,
&SkPaint::isLCDRenderText, &SkPaint::setLCDRenderText);
paintFlag("Embedded Bitmap Text",
"Default\0No Embedded Bitmaps\0Embedded Bitmaps\0\0",
SkPaint::kEmbeddedBitmapText_Flag,
&SkPaint::isEmbeddedBitmapText, &SkPaint::setEmbeddedBitmapText);
paintFlag("Force Auto-Hinting",
"Default\0No Force Auto-Hinting\0Force Auto-Hinting\0\0",
SkPaint::kAutoHinting_Flag,
&SkPaint::isAutohinted, &SkPaint::setAutohinted);
paintFlag("Vertical Text",
"Default\0No Vertical Text\0Vertical Text\0\0",
SkPaint::kVerticalText_Flag,
&SkPaint::isVerticalText, &SkPaint::setVerticalText);
ImGui::Checkbox("Override TextSize", &fPaintOverrides.fTextSize);
if (fPaintOverrides.fTextSize) {
ImGui::DragFloat2("TextRange", fPaintOverrides.fTextSizeRange,
0.001f, -10.0f, 300.0f, "%.6f", 2.0f);
float textSize = fPaint.getTextSize();
if (ImGui::DragFloat("TextSize", &textSize, 0.001f,
fPaintOverrides.fTextSizeRange[0],
fPaintOverrides.fTextSizeRange[1],
"%.6f", 2.0f))
{
fPaint.setTextSize(textSize);
this->preTouchMatrixChanged();
paramsChanged = true;
}
}
}
{
SkMetaData controls;
if (fSlides[fCurrentSlide]->onGetControls(&controls)) {
if (ImGui::CollapsingHeader("Current Slide")) {
SkMetaData::Iter iter(controls);
const char* name;
SkMetaData::Type type;
int count;
while ((name = iter.next(&type, &count)) != nullptr) {
if (type == SkMetaData::kScalar_Type) {
float val[3];
SkASSERT(count == 3);
controls.findScalars(name, &count, val);
if (ImGui::SliderFloat(name, &val[0], val[1], val[2])) {
controls.setScalars(name, 3, val);
}
}
}
fSlides[fCurrentSlide]->onSetControls(controls);
}
}
}
if (fShowSlidePicker) {
ImGui::SetNextTreeNodeOpen(true);
}
if (ImGui::CollapsingHeader("Slide")) {
static ImGuiTextFilter filter;
static ImVector<const char*> filteredSlideNames;
static ImVector<int> filteredSlideIndices;
if (fShowSlidePicker) {
ImGui::SetKeyboardFocusHere();
fShowSlidePicker = false;
}
filter.Draw();
filteredSlideNames.clear();
filteredSlideIndices.clear();
int filteredIndex = 0;
for (int i = 0; i < fSlides.count(); ++i) {
const char* slideName = fSlides[i]->getName().c_str();
if (filter.PassFilter(slideName) || i == fCurrentSlide) {
if (i == fCurrentSlide) {
filteredIndex = filteredSlideIndices.size();
}
filteredSlideNames.push_back(slideName);
filteredSlideIndices.push_back(i);
}
}
if (ImGui::ListBox("", &filteredIndex, filteredSlideNames.begin(),
filteredSlideNames.size(), 20)) {
this->setCurrentSlide(filteredSlideIndices[filteredIndex]);
}
}
if (ImGui::CollapsingHeader("Color Mode")) {
ColorMode newMode = fColorMode;
auto cmButton = [&](ColorMode mode, const char* label) {
if (ImGui::RadioButton(label, mode == fColorMode)) {
newMode = mode;
}
};
cmButton(ColorMode::kLegacy, "Legacy 8888");
cmButton(ColorMode::kColorManagedSRGB8888_NonLinearBlending,
"Color Managed 8888 (Nonlinear blending)");
cmButton(ColorMode::kColorManagedSRGB8888, "Color Managed 8888");
cmButton(ColorMode::kColorManagedLinearF16, "Color Managed F16");
if (newMode != fColorMode) {
// It isn't safe to switch color mode now (in the middle of painting). We might
// tear down the back-end, etc... Defer this change until the next onIdle.
fDeferredActions.push_back([=]() {
this->setColorMode(newMode);
});
}
// Pick from common gamuts:
int primariesIdx = 4; // Default: Custom
for (size_t i = 0; i < SK_ARRAY_COUNT(gNamedPrimaries); ++i) {
if (primaries_equal(*gNamedPrimaries[i].fPrimaries, fColorSpacePrimaries)) {
primariesIdx = i;
break;
}
}
// When we're in xform canvas mode, we can alter the transfer function, too
if (ColorMode::kColorManagedSRGB8888_NonLinearBlending == fColorMode) {
ImGui::SliderFloat("Gamma", &fColorSpaceTransferFn.fG, 0.5f, 3.5f);
}
if (ImGui::Combo("Primaries", &primariesIdx,
"sRGB\0AdobeRGB\0P3\0Rec. 2020\0Custom\0\0")) {
if (primariesIdx >= 0 && primariesIdx <= 3) {
fColorSpacePrimaries = *gNamedPrimaries[primariesIdx].fPrimaries;
}
}
// Allow direct editing of gamut
ImGui_Primaries(&fColorSpacePrimaries, &fImGuiGamutPaint);
}
}
if (paramsChanged) {
fDeferredActions.push_back([=]() {
fWindow->setRequestedDisplayParams(params);
fWindow->inval();
this->updateTitle();
});
}
ImGui::End();
}
if (fShowZoomWindow && fLastImage) {
ImGui::SetNextWindowSize(ImVec2(200, 200), ImGuiCond_FirstUseEver);
if (ImGui::Begin("Zoom", &fShowZoomWindow)) {
static int zoomFactor = 8;
if (ImGui::Button("<<")) {
zoomFactor = SkTMax(zoomFactor / 2, 4);
}
ImGui::SameLine(); ImGui::Text("%2d", zoomFactor); ImGui::SameLine();
if (ImGui::Button(">>")) {
zoomFactor = SkTMin(zoomFactor * 2, 32);
}
if (!fZoomWindowFixed) {
ImVec2 mousePos = ImGui::GetMousePos();
fZoomWindowLocation = SkPoint::Make(mousePos.x, mousePos.y);
}
SkScalar x = fZoomWindowLocation.x();
SkScalar y = fZoomWindowLocation.y();
int xInt = SkScalarRoundToInt(x);
int yInt = SkScalarRoundToInt(y);
ImVec2 avail = ImGui::GetContentRegionAvail();
uint32_t pixel = 0;
SkImageInfo info = SkImageInfo::MakeN32Premul(1, 1);
if (fLastImage->readPixels(info, &pixel, info.minRowBytes(), xInt, yInt)) {
ImGui::SameLine();
ImGui::Text("(X, Y): %d, %d RGBA: %x %x %x %x",
xInt, yInt,
SkGetPackedR32(pixel), SkGetPackedG32(pixel),
SkGetPackedB32(pixel), SkGetPackedA32(pixel));
}
fImGuiLayer.skiaWidget(avail, [=](SkCanvas* c) {
// Translate so the region of the image that's under the mouse cursor is centered
// in the zoom canvas:
c->scale(zoomFactor, zoomFactor);
c->translate(avail.x * 0.5f / zoomFactor - x - 0.5f,
avail.y * 0.5f / zoomFactor - y - 0.5f);
c->drawImage(this->fLastImage, 0, 0);
SkPaint outline;
outline.setStyle(SkPaint::kStroke_Style);
c->drawRect(SkRect::MakeXYWH(x, y, 1, 1), outline);
});
}
ImGui::End();
}
}
void Viewer::onIdle() {
for (int i = 0; i < fDeferredActions.count(); ++i) {
fDeferredActions[i]();
}
fDeferredActions.reset();
fStatsLayer.beginTiming(fAnimateTimer);
fAnimTimer.updateTime();
bool animateWantsInval = fSlides[fCurrentSlide]->animate(fAnimTimer);
fStatsLayer.endTiming(fAnimateTimer);
ImGuiIO& io = ImGui::GetIO();
// ImGui always has at least one "active" window, which is the default "Debug" window. It may
// not be visible, though. So we need to redraw if there is at least one visible window, or
// more than one active window. Newly created windows are active but not visible for one frame
// while they determine their layout and sizing.
if (animateWantsInval || fStatsLayer.getActive() || fRefresh ||
io.MetricsActiveWindows > 1 || io.MetricsRenderWindows > 0) {
fWindow->inval();
}
}
template <typename OptionsFunc>
static void WriteStateObject(SkJSONWriter& writer, const char* name, const char* value,
OptionsFunc&& optionsFunc) {
writer.beginObject();
{
writer.appendString(kName , name);
writer.appendString(kValue, value);
writer.beginArray(kOptions);
{
optionsFunc(writer);
}
writer.endArray();
}
writer.endObject();
}
void Viewer::updateUIState() {
if (!fWindow) {
return;
}
if (fWindow->sampleCount() < 1) {
return; // Surface hasn't been created yet.
}
SkDynamicMemoryWStream memStream;
SkJSONWriter writer(&memStream);
writer.beginArray();
// Slide state
WriteStateObject(writer, kSlideStateName, fSlides[fCurrentSlide]->getName().c_str(),
[this](SkJSONWriter& writer) {
for(const auto& slide : fSlides) {
writer.appendString(slide->getName().c_str());
}
});
// Backend state
WriteStateObject(writer, kBackendStateName, kBackendTypeStrings[fBackendType],
[](SkJSONWriter& writer) {
for (const auto& str : kBackendTypeStrings) {
writer.appendString(str);
}
});
// MSAA state
const auto countString = SkStringPrintf("%d", fWindow->sampleCount());
WriteStateObject(writer, kMSAAStateName, countString.c_str(),
[this](SkJSONWriter& writer) {
writer.appendS32(0);
if (sk_app::Window::kRaster_BackendType == fBackendType) {
return;
}
for (int msaa : {4, 8, 16}) {
writer.appendS32(msaa);
}
});
// Path renderer state
GpuPathRenderers pr = fWindow->getRequestedDisplayParams().fGrContextOptions.fGpuPathRenderers;
WriteStateObject(writer, kPathRendererStateName, gPathRendererNames[pr].c_str(),
[this](SkJSONWriter& writer) {
const GrContext* ctx = fWindow->getGrContext();
if (!ctx) {
writer.appendString("Software");
} else {
const auto* caps = ctx->contextPriv().caps();
writer.appendString(gPathRendererNames[GpuPathRenderers::kAll].c_str());
if (fWindow->sampleCount() > 1) {
if (caps->shaderCaps()->pathRenderingSupport()) {
writer.appendString(
gPathRendererNames[GpuPathRenderers::kStencilAndCover].c_str());
}
} else {
if(GrCoverageCountingPathRenderer::IsSupported(*caps)) {
writer.appendString(
gPathRendererNames[GpuPathRenderers::kCoverageCounting].c_str());
}
writer.appendString(gPathRendererNames[GpuPathRenderers::kSmall].c_str());
}
writer.appendString(
gPathRendererNames[GpuPathRenderers::kTessellating].c_str());
writer.appendString(gPathRendererNames[GpuPathRenderers::kNone].c_str());
}
});
// Softkey state
WriteStateObject(writer, kSoftkeyStateName, kSoftkeyHint,
[this](SkJSONWriter& writer) {
writer.appendString(kSoftkeyHint);
for (const auto& softkey : fCommands.getCommandsAsSoftkeys()) {
writer.appendString(softkey.c_str());
}
});
writer.endArray();
writer.flush();
auto data = memStream.detachAsData();
// TODO: would be cool to avoid this copy
const SkString cstring(static_cast<const char*>(data->data()), data->size());
fWindow->setUIState(cstring.c_str());
}
void Viewer::onUIStateChanged(const SkString& stateName, const SkString& stateValue) {
// For those who will add more features to handle the state change in this function:
// After the change, please call updateUIState no notify the frontend (e.g., Android app).
// For example, after slide change, updateUIState is called inside setupCurrentSlide;
// after backend change, updateUIState is called in this function.
if (stateName.equals(kSlideStateName)) {
for (int i = 0; i < fSlides.count(); ++i) {
if (fSlides[i]->getName().equals(stateValue)) {
this->setCurrentSlide(i);
return;
}
}
SkDebugf("Slide not found: %s", stateValue.c_str());
} else if (stateName.equals(kBackendStateName)) {
for (int i = 0; i < sk_app::Window::kBackendTypeCount; i++) {
if (stateValue.equals(kBackendTypeStrings[i])) {
if (fBackendType != i) {
fBackendType = (sk_app::Window::BackendType)i;
fWindow->detach();
fWindow->attach(backend_type_for_window(fBackendType));
}
break;
}
}
} else if (stateName.equals(kMSAAStateName)) {
DisplayParams params = fWindow->getRequestedDisplayParams();
int sampleCount = atoi(stateValue.c_str());
if (sampleCount != params.fMSAASampleCount) {
params.fMSAASampleCount = sampleCount;
fWindow->setRequestedDisplayParams(params);
fWindow->inval();
this->updateTitle();
this->updateUIState();
}
} else if (stateName.equals(kPathRendererStateName)) {
DisplayParams params = fWindow->getRequestedDisplayParams();
for (const auto& pair : gPathRendererNames) {
if (pair.second == stateValue.c_str()) {
if (params.fGrContextOptions.fGpuPathRenderers != pair.first) {
params.fGrContextOptions.fGpuPathRenderers = pair.first;
fWindow->setRequestedDisplayParams(params);
fWindow->inval();
this->updateTitle();
this->updateUIState();
}
break;
}
}
} else if (stateName.equals(kSoftkeyStateName)) {
if (!stateValue.equals(kSoftkeyHint)) {
fCommands.onSoftkey(stateValue);
this->updateUIState(); // This is still needed to reset the value to kSoftkeyHint
}
} else if (stateName.equals(kRefreshStateName)) {
// This state is actually NOT in the UI state.
// We use this to allow Android to quickly set bool fRefresh.
fRefresh = stateValue.equals(kON);
} else {
SkDebugf("Unknown stateName: %s", stateName.c_str());
}
}
bool Viewer::onKey(sk_app::Window::Key key, sk_app::Window::InputState state, uint32_t modifiers) {
return fCommands.onKey(key, state, modifiers);
}
bool Viewer::onChar(SkUnichar c, uint32_t modifiers) {
if (fSlides[fCurrentSlide]->onChar(c)) {
fWindow->inval();
return true;
} else {
return fCommands.onChar(c, modifiers);
}
}
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