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skia2/tools/viewer/Viewer.cpp
Ben Wagner 483c772cfd Add nativeFonts flag to Viewer. 
This moves DMFontMgr and several related files which are tightly related
to fonts into tools/fonts, moves some flags around to prevent
duplication, and adds the nativeFonts handling to Viewer.

Change-Id: Id1bdad708a6b74319ac5ac9adfe21025db4ca0b2
Reviewed-on: https://skia-review.googlesource.com/108904
Commit-Queue: Ben Wagner <bungeman@google.com>
Reviewed-by: Mike Klein <mtklein@chromium.org>
2018-02-21 03:31:14 +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 "Viewer.h"
#include "BisectSlide.h"
#include "GMSlide.h"
#include "ImageSlide.h"
#include "Resources.h"
#include "SampleSlide.h"
#include "SkottieSlide.h"
#include "SKPSlide.h"
#include "SlideDir.h"
#include "GrContext.h"
#include "SkCanvas.h"
#include "SkColorSpacePriv.h"
#include "SkColorSpaceXformCanvas.h"
#include "SkCommonFlags.h"
#include "SkCommandLineFlags.h"
#include "SkCommonFlagsGpu.h"
#include "SkEventTracingPriv.h"
#include "SkFontMgrPriv.h"
#include "SkGraphics.h"
#include "SkImagePriv.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 "SkThreadedBMPDevice.h"
#include "imgui.h"
#include "ccpr/GrCoverageCountingPathRenderer.h"
#include <stdlib.h>
#include <map>
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)
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)
, fLastImage(nullptr)
, 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)
, fGestureDevice(GestureDevice::kNone)
, fTileCnt(0)
, fThreadCnt(0)
{
SkGraphics::Init();
gPathRendererNames[GpuPathRenderers::kAll] = "All Path Renderers";
gPathRendererNames[GpuPathRenderers::kDefault] =
"Default Ganesh Behavior (best path renderer, not including CCPR)";
gPathRendererNames[GpuPathRenderers::kStencilAndCover] = "NV_path_rendering";
gPathRendererNames[GpuPathRenderers::kMSAA] = "Sample shading";
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('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('+', "Threaded Backend", "Increase tile count", [this]() {
fTileCnt++;
if (fThreadCnt == 0) {
this->resetExecutor();
}
this->updateTitle();
fWindow->inval();
});
fCommands.addCommand('-', "Threaded Backend", "Decrease tile count", [this]() {
fTileCnt = SkTMax(0, fTileCnt - 1);
if (fThreadCnt == 0) {
this->resetExecutor();
}
this->updateTitle();
fWindow->inval();
});
fCommands.addCommand('>', "Threaded Backend", "Increase thread count", [this]() {
if (fTileCnt == 0) {
return;
}
fThreadCnt = (fThreadCnt + 1) % fTileCnt;
this->resetExecutor();
this->updateTitle();
fWindow->inval();
});
fCommands.addCommand('<', "Threaded Backend", "Decrease thread count", [this]() {
if (fTileCnt == 0) {
return;
}
fThreadCnt = (fThreadCnt + fTileCnt - 1) % fTileCnt;
this->resetExecutor();
this->updateTitle();
fWindow->inval();
});
fCommands.addCommand('K', "IO", "Save slide to SKP", [this]() {
fSaveToSKP = true;
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);
fPaintOverrides.fOriginalSkUseAnalyticAA = gSkUseAnalyticAA;
fPaintOverrides.fOriginalSkForceAnalyticAA = gSkForceAnalyticAA;
fPaintOverrides.fOriginalSkUseDeltaAA = gSkUseDeltaAA;
fPaintOverrides.fOriginalSkForceDeltaAA = gSkForceDeltaAA;
gSkUseAnalyticAA = gSkForceAnalyticAA = false;
gSkUseDeltaAA = gSkForceDeltaAA = false;
} else {
fPaint.setAntiAlias(true);
switch (fPaintOverrides.fAntiAlias) {
case SkPaintFields::AntiAliasState::Alias:
fPaintOverrides.fAntiAlias = SkPaintFields::AntiAliasState::Normal;
break;
case SkPaintFields::AntiAliasState::Normal:
fPaintOverrides.fAntiAlias = SkPaintFields::AntiAliasState::AnalyticAAEnabled;
gSkUseDeltaAA = gSkForceDeltaAA = false;
gSkUseAnalyticAA = true;
break;
case SkPaintFields::AntiAliasState::AnalyticAAEnabled:
fPaintOverrides.fAntiAlias = SkPaintFields::AntiAliasState::AnalyticAAForced;
gSkForceAnalyticAA = true;
break;
case SkPaintFields::AntiAliasState::AnalyticAAForced:
fPaintOverrides.fAntiAlias = SkPaintFields::AntiAliasState::DeltaAAEnabled;
gSkUseAnalyticAA = gSkForceAnalyticAA = false;
gSkUseDeltaAA = true;
break;
case SkPaintFields::AntiAliasState::DeltaAAEnabled:
fPaintOverrides.fAntiAlias = SkPaintFields::AntiAliasState::DeltaAAForced;
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('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();
});
// set up slides
this->initSlides();
if (FLAGS_list) {
this->listNames();
}
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() {
fAllSlideNames = Json::Value(Json::arrayValue);
// 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();
const skiagm::GMRegistry* gms(skiagm::GMRegistry::Head());
while (gms) {
std::unique_ptr<skiagm::GM> gm(gms->factory()(nullptr));
if (!SkCommandLineFlags::ShouldSkip(FLAGS_match, gm->getName())) {
sk_sp<Slide> slide(new GMSlide(gm.release()));
fSlides.push_back(std::move(slide));
}
gms = gms->next();
}
// 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
const SkViewRegister* reg = SkViewRegister::Head();
while (reg) {
sk_sp<Slide> slide(new SampleSlide(reg->factory()));
if (!SkCommandLineFlags::ShouldSkip(FLAGS_match, slide->getName().c_str())) {
fSlides.push_back(slide);
}
reg = reg->next();
}
// SKPs
for (int i = 0; i < FLAGS_skps.count(); i++) {
if (SkStrEndsWith(FLAGS_skps[i], ".skp")) {
if (SkCommandLineFlags::ShouldSkip(FLAGS_match, FLAGS_skps[i])) {
continue;
}
SkString path(FLAGS_skps[i]);
sk_sp<SKPSlide> slide(new SKPSlide(SkOSPath::Basename(path.c_str()), path));
if (slide) {
fSlides.push_back(slide);
}
} else {
SkOSFile::Iter it(FLAGS_skps[i], ".skp");
SkString skpName;
while (it.next(&skpName)) {
if (SkCommandLineFlags::ShouldSkip(FLAGS_match, skpName.c_str())) {
continue;
}
SkString path = SkOSPath::Join(FLAGS_skps[i], skpName.c_str());
sk_sp<SKPSlide> slide(new SKPSlide(skpName, path));
if (slide) {
fSlides.push_back(slide);
}
}
}
}
// JPGs
for (int i = 0; i < FLAGS_jpgs.count(); i++) {
SkOSFile::Iter it(FLAGS_jpgs[i], ".jpg");
SkString jpgName;
while (it.next(&jpgName)) {
if (SkCommandLineFlags::ShouldSkip(FLAGS_match, jpgName.c_str())) {
continue;
}
SkString path = SkOSPath::Join(FLAGS_jpgs[i], jpgName.c_str());
sk_sp<ImageSlide> slide(new ImageSlide(jpgName, path));
if (slide) {
fSlides.push_back(slide);
}
}
}
// JSONs
for (const auto& json : FLAGS_jsons) {
SkTArray<sk_sp<Slide>, true> dirSlides;
SkOSFile::Iter it(json.c_str(), ".json");
SkString jsonName;
while (it.next(&jsonName)) {
if (SkCommandLineFlags::ShouldSkip(FLAGS_match, jsonName.c_str())) {
continue;
}
auto slide = sk_make_sp<SkottieSlide>(jsonName, SkOSPath::Join(json.c_str(),
jsonName.c_str()));
dirSlides.push_back(slide);
fSlides.push_back(std::move(slide));
}
if (!dirSlides.empty()) {
fSlides.push_back(sk_make_sp<SlideDir>(SkStringPrintf("skottie-dir[%s]", json.c_str()),
std::move(dirSlides)));
}
}
}
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);
if (fPaintOverrides.fFlags & SkPaint::kAntiAlias_Flag) {
if (fPaint.isAntiAlias()) {
paintTitle.append("Antialias");
} else {
paintTitle.append("Alias");
}
}
if (fPaintOverrides.fFlags & SkPaint::kLCDRenderText_Flag) {
if (fPaint.isLCDRenderText()) {
paintTitle.append("LCD");
} else {
paintTitle.append("lcd");
}
}
if (fPaintOverrides.fFlags & SkPaint::kSubpixelText_Flag) {
if (fPaint.isSubpixelText()) {
paintTitle.append("Subpixel Glyphs");
} else {
paintTitle.append("Pixel Glyphs");
}
}
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();
if (fTileCnt > 0) {
title.appendf(" T%d", fTileCnt);
if (fThreadCnt > 0) {
title.appendf("/%d", fThreadCnt);
}
}
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);
}
}
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::kDefault != pr) {
title.appendf(" [Path renderer: %s]", gPathRendererNames[pr].c_str());
}
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, fDefaultMatrix);
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);
}
SkMatrix Viewer::computeMatrix() {
SkMatrix m;
SkScalar zoomScale = (fZoomLevel < 0) ? SK_Scalar1 / (SK_Scalar1 - fZoomLevel)
: SK_Scalar1 + fZoomLevel;
m = fGesture.localM();
m.preConcat(fGesture.globalM());
m.preConcat(fDefaultMatrix);
m.preScale(zoomScale, zoomScale);
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)
{ }
bool onFilter(SkTCopyOnFirstWrite<SkPaint>* paint, Type) const override {
if (fPaintOverrides->fHinting) {
paint->writable()->setHinting(fPaint->getHinting());
}
if (fPaintOverrides->fFlags & SkPaint::kAntiAlias_Flag) {
paint->writable()->setAntiAlias(fPaint->isAntiAlias());
}
if (fPaintOverrides->fFlags & SkPaint::kLCDRenderText_Flag) {
paint->writable()->setLCDRenderText(fPaint->isLCDRenderText());
}
if (fPaintOverrides->fFlags & SkPaint::kSubpixelText_Flag) {
paint->writable()->setSubpixelText(fPaint->isSubpixelText());
}
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(SkMatrix44::kIdentity_Constructor);
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.
sk_sp<SkSurface> offscreenSurface = nullptr;
std::unique_ptr<SkThreadedBMPDevice> threadedDevice;
std::unique_ptr<SkCanvas> threadedCanvas;
if (Window::kRaster_BackendType == fBackendType ||
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));
offscreenSurface = Window::kRaster_BackendType == fBackendType ? SkSurface::MakeRaster(info)
: canvas->makeSurface(info);
SkPixmap offscreenPixmap;
if (fTileCnt > 0 && offscreenSurface->peekPixels(&offscreenPixmap)) {
SkBitmap offscreenBitmap;
offscreenBitmap.installPixels(offscreenPixmap);
threadedDevice.reset(new SkThreadedBMPDevice(offscreenBitmap, fTileCnt,
fThreadCnt, fExecutor.get()));
threadedCanvas.reset(new SkCanvas(threadedDevice.get()));
slideCanvas = threadedCanvas.get();
} else {
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());
// 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);
canvas->drawImage(retaggedImage, 0, 0, &paint);
}
}
void Viewer::onBackendCreated() {
this->setupCurrentSlide();
fWindow->show();
}
void Viewer::onPaint(SkCanvas* canvas) {
this->drawSlide(canvas);
fCommands.drawHelp(canvas);
this->drawImGui();
// Update the FPS
this->updateUIState();
}
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);
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));
ImVec2 endPos = ImGui::GetCursorPos();
// 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::SetCursorPos(endPos);
}
void Viewer::drawImGui() {
// Support drawing the ImGui demo window. Superfluous, but gives a good idea of what's possible
if (fShowImGuiTestWindow) {
ImGui::ShowTestWindow(&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), ImGuiSetCond_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;
}
}
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::kDefault);
prButton(GpuPathRenderers::kAll);
if (ctx->caps()->shaderCaps()->pathRenderingSupport()) {
prButton(GpuPathRenderers::kStencilAndCover);
}
if (ctx->caps()->sampleShadingSupport()) {
prButton(GpuPathRenderers::kMSAA);
}
prButton(GpuPathRenderers::kTessellating);
prButton(GpuPathRenderers::kNone);
} else {
prButton(GpuPathRenderers::kDefault);
prButton(GpuPathRenderers::kAll);
if (GrCoverageCountingPathRenderer::IsSupported(*ctx->caps())) {
prButton(GpuPathRenderers::kCoverageCounting);
}
prButton(GpuPathRenderers::kSmall);
prButton(GpuPathRenderers::kTessellating);
prButton(GpuPathRenderers::kNone);
}
ImGui::TreePop();
}
}
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) {
if (ImGui::Begin("Zoom", &fShowZoomWindow, ImVec2(200, 200))) {
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);
}
ImVec2 mousePos = ImGui::GetMousePos();
ImVec2 avail = ImGui::GetContentRegionAvail();
uint32_t pixel = 0;
SkImageInfo info = SkImageInfo::MakeN32Premul(1, 1);
if (fLastImage->readPixels(info, &pixel, info.minRowBytes(), mousePos.x, mousePos.y)) {
ImGui::SameLine();
ImGui::Text("(X, Y): %d, %d RGBA: %x %x %x %x",
sk_float_round2int(mousePos.x), sk_float_round2int(mousePos.y),
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 - mousePos.x - 0.5f,
avail.y * 0.5f / zoomFactor - mousePos.y - 0.5f);
c->drawImage(this->fLastImage, 0, 0);
SkPaint outline;
outline.setStyle(SkPaint::kStroke_Style);
c->drawRect(SkRect::MakeXYWH(mousePos.x, mousePos.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();
if (animateWantsInval || fStatsLayer.getActive() || fRefresh || io.MetricsActiveWindows) {
fWindow->inval();
}
}
void Viewer::updateUIState() {
if (!fWindow) {
return;
}
if (fWindow->sampleCount() < 1) {
return; // Surface hasn't been created yet.
}
// Slide state
Json::Value slideState(Json::objectValue);
slideState[kName] = kSlideStateName;
slideState[kValue] = fSlides[fCurrentSlide]->getName().c_str();
if (fAllSlideNames.size() == 0) {
for(auto slide : fSlides) {
fAllSlideNames.append(Json::Value(slide->getName().c_str()));
}
}
slideState[kOptions] = fAllSlideNames;
// Backend state
Json::Value backendState(Json::objectValue);
backendState[kName] = kBackendStateName;
backendState[kValue] = kBackendTypeStrings[fBackendType];
backendState[kOptions] = Json::Value(Json::arrayValue);
for (auto str : kBackendTypeStrings) {
backendState[kOptions].append(Json::Value(str));
}
// MSAA state
Json::Value msaaState(Json::objectValue);
msaaState[kName] = kMSAAStateName;
msaaState[kValue] = fWindow->sampleCount();
msaaState[kOptions] = Json::Value(Json::arrayValue);
if (sk_app::Window::kRaster_BackendType == fBackendType) {
msaaState[kOptions].append(Json::Value(0));
} else {
for (int msaa : {0, 4, 8, 16}) {
msaaState[kOptions].append(Json::Value(msaa));
}
}
// Path renderer state
GpuPathRenderers pr = fWindow->getRequestedDisplayParams().fGrContextOptions.fGpuPathRenderers;
Json::Value prState(Json::objectValue);
prState[kName] = kPathRendererStateName;
prState[kValue] = gPathRendererNames[pr];
prState[kOptions] = Json::Value(Json::arrayValue);
const GrContext* ctx = fWindow->getGrContext();
if (!ctx) {
prState[kOptions].append("Software");
} else if (fWindow->sampleCount() > 1) {
prState[kOptions].append(gPathRendererNames[GpuPathRenderers::kDefault]);
prState[kOptions].append(gPathRendererNames[GpuPathRenderers::kAll]);
if (ctx->caps()->shaderCaps()->pathRenderingSupport()) {
prState[kOptions].append(gPathRendererNames[GpuPathRenderers::kStencilAndCover]);
}
if (ctx->caps()->sampleShadingSupport()) {
prState[kOptions].append(gPathRendererNames[GpuPathRenderers::kMSAA]);
}
prState[kOptions].append(gPathRendererNames[GpuPathRenderers::kTessellating]);
prState[kOptions].append(gPathRendererNames[GpuPathRenderers::kNone]);
} else {
prState[kOptions].append(gPathRendererNames[GpuPathRenderers::kDefault]);
prState[kOptions].append(gPathRendererNames[GpuPathRenderers::kAll]);
if (GrCoverageCountingPathRenderer::IsSupported(*ctx->caps())) {
prState[kOptions].append(gPathRendererNames[GpuPathRenderers::kCoverageCounting]);
}
prState[kOptions].append(gPathRendererNames[GpuPathRenderers::kSmall]);
prState[kOptions].append(gPathRendererNames[GpuPathRenderers::kTessellating]);
prState[kOptions].append(gPathRendererNames[GpuPathRenderers::kNone]);
}
// Softkey state
Json::Value softkeyState(Json::objectValue);
softkeyState[kName] = kSoftkeyStateName;
softkeyState[kValue] = kSoftkeyHint;
softkeyState[kOptions] = Json::Value(Json::arrayValue);
softkeyState[kOptions].append(kSoftkeyHint);
for (const auto& softkey : fCommands.getCommandsAsSoftkeys()) {
softkeyState[kOptions].append(Json::Value(softkey.c_str()));
}
// FPS state
Json::Value fpsState(Json::objectValue);
fpsState[kName] = kFpsStateName;
double animTime = fStatsLayer.getLastTime(fAnimateTimer);
double paintTime = fStatsLayer.getLastTime(fPaintTimer);
double flushTime = fStatsLayer.getLastTime(fFlushTimer);
fpsState[kValue] = SkStringPrintf("%8.3lf ms\n\nA %8.3lf\nP %8.3lf\nF%8.3lf",
animTime + paintTime + flushTime,
animTime, paintTime, flushTime).c_str();
fpsState[kOptions] = Json::Value(Json::arrayValue);
Json::Value state(Json::arrayValue);
state.append(slideState);
state.append(backendState);
state.append(msaaState);
state.append(prState);
state.append(softkeyState);
state.append(fpsState);
fWindow->setUIState(state.toStyledString().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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