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3661bc9976
skia2/tools/viewer/Viewer.cpp
Mike Reed 3661bc9976 hide trivial helpers on canvas 
BUG=skia:

Change-Id: I42d4ca92897bde5bd8e0575a0104b12b83134cef
Reviewed-on: https://skia-review.googlesource.com/8852
Reviewed-by: Cary Clark <caryclark@google.com>
Commit-Queue: Mike Reed <reed@google.com>
2017-02-22 19:41:04 +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 "GMSlide.h"
#include "ImageSlide.h"
#include "Resources.h"
#include "SampleSlide.h"
#include "SKPSlide.h"
#include "SkATrace.h"
#include "SkCanvas.h"
#include "SkCommandLineFlags.h"
#include "SkDashPathEffect.h"
#include "SkGraphics.h"
#include "SkImagePriv.h"
#include "SkMetaData.h"
#include "SkOSFile.h"
#include "SkOSPath.h"
#include "SkRandom.h"
#include "SkStream.h"
#include "SkSurface.h"
#include "SkSwizzle.h"
#include "SkTaskGroup.h"
#include "SkTime.h"
#include "imgui.h"
using namespace sk_app;
Application* Application::Create(int argc, char** argv, void* platformData) {
return new Viewer(argc, argv, platformData);
}
static void on_paint_handler(SkCanvas* canvas, void* userData) {
Viewer* vv = reinterpret_cast<Viewer*>(userData);
return vv->onPaint(canvas);
}
static bool on_touch_handler(intptr_t owner, Window::InputState state, float x, float y, void* userData)
{
Viewer* viewer = reinterpret_cast<Viewer*>(userData);
return viewer->onTouch(owner, state, x, y);
}
static void on_ui_state_changed_handler(const SkString& stateName, const SkString& stateValue, void* userData) {
Viewer* viewer = reinterpret_cast<Viewer*>(userData);
return viewer->onUIStateChanged(stateName, stateValue);
}
static bool on_mouse_handler(int x, int y, Window::InputState state, uint32_t modifiers,
void* userData) {
ImGuiIO& io = ImGui::GetIO();
io.MousePos.x = static_cast<float>(x);
io.MousePos.y = static_cast<float>(y);
if (Window::kDown_InputState == state) {
io.MouseDown[0] = true;
} else if (Window::kUp_InputState == state) {
io.MouseDown[0] = false;
}
return true;
}
static bool on_mouse_wheel_handler(float delta, uint32_t modifiers, void* userData) {
ImGuiIO& io = ImGui::GetIO();
io.MouseWheel += delta;
return true;
}
static bool on_key_handler(Window::Key key, Window::InputState state, uint32_t modifiers,
void* userData) {
ImGuiIO& io = ImGui::GetIO();
io.KeysDown[static_cast<int>(key)] = (Window::kDown_InputState == state);
if (io.WantCaptureKeyboard) {
return true;
} else {
Viewer* viewer = reinterpret_cast<Viewer*>(userData);
return viewer->onKey(key, state, modifiers);
}
}
static bool on_char_handler(SkUnichar c, uint32_t modifiers, void* userData) {
ImGuiIO& io = ImGui::GetIO();
if (io.WantTextInput) {
if (c > 0 && c < 0x10000) {
io.AddInputCharacter(c);
}
return true;
} else {
Viewer* viewer = reinterpret_cast<Viewer*>(userData);
return viewer->onChar(c, modifiers);
}
}
static DEFINE_bool2(fullscreen, f, true, "Run fullscreen.");
static DEFINE_string2(match, m, nullptr,
"[~][^]substring[$] [...] of bench name to run.\n"
"Multiple matches may be separated by spaces.\n"
"~ causes a matching bench to always be skipped\n"
"^ requires the start of the bench to match\n"
"$ requires the end of the bench to match\n"
"^ and $ requires an exact match\n"
"If a bench does not match any list entry,\n"
"it is skipped unless some list entry starts with ~");
DEFINE_string(slide, "", "Start on this sample.");
DEFINE_bool(list, false, "List samples?");
#ifdef SK_VULKAN
# define BACKENDS_STR "\"sw\", \"gl\", and \"vk\""
#else
# define BACKENDS_STR "\"sw\" and \"gl\""
#endif
#ifdef SK_BUILD_FOR_ANDROID
static DEFINE_string(skps, "/data/local/tmp/skia", "Directory to read skps from.");
static DEFINE_string(jpgs, "/data/local/tmp/skia", "Directory to read jpgs from.");
#else
static DEFINE_string(skps, "skps", "Directory to read skps from.");
static DEFINE_string(jpgs, "jpgs", "Directory to read jpgs from.");
#endif
static DEFINE_string2(backend, b, "sw", "Backend to use. Allowed values are " BACKENDS_STR ".");
static DEFINE_bool(atrace, false, "Enable support for using ATrace. ATrace is only supported on Android.");
const char *kBackendTypeStrings[sk_app::Window::kBackendTypeCount] = {
" [OpenGL]",
#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 (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;
}
}
const char* kName = "name";
const char* kValue = "value";
const char* kOptions = "options";
const char* kSlideStateName = "Slide";
const char* kBackendStateName = "Backend";
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)
: fCurrentMeasurement(0)
, fSetupFirstFrame(false)
, fDisplayStats(false)
, fRefresh(false)
, fShowImGuiDebugWindow(false)
, fShowImGuiTestWindow(false)
, fShowZoomWindow(false)
, fLastImage(nullptr)
, fBackendType(sk_app::Window::kNativeGL_BackendType)
, fColorType(kN32_SkColorType)
, fColorSpace(nullptr)
, fZoomCenterX(0.0f)
, fZoomCenterY(0.0f)
, fZoomLevel(0.0f)
, fZoomScale(SK_Scalar1)
{
static SkTaskGroup::Enabler kTaskGroupEnabler;
SkGraphics::Init();
memset(fPaintTimes, 0, sizeof(fPaintTimes));
memset(fFlushTimes, 0, sizeof(fFlushTimes));
memset(fAnimateTimes, 0, sizeof(fAnimateTimes));
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/skia");
#endif
if (FLAGS_atrace) {
SkEventTracer::SetInstance(new SkATrace());
}
fBackendType = get_backend_type(FLAGS_backend[0]);
fWindow = Window::CreateNativeWindow(platformData);
fWindow->attach(fBackendType, DisplayParams());
// register callbacks
fCommands.attach(fWindow);
fWindow->registerPaintFunc(on_paint_handler, this);
fWindow->registerTouchFunc(on_touch_handler, this);
fWindow->registerUIStateChangedFunc(on_ui_state_changed_handler, this);
fWindow->registerMouseFunc(on_mouse_handler, this);
fWindow->registerMouseWheelFunc(on_mouse_wheel_handler, this);
fWindow->registerKeyFunc(on_key_handler, this);
fWindow->registerCharFunc(on_char_handler, this);
// add key-bindings
fCommands.addCommand(' ', "GUI", "Toggle Debug GUI", [this]() {
this->fShowImGuiDebugWindow = !this->fShowImGuiDebugWindow;
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]() {
this->fDisplayStats = !this->fDisplayStats;
fWindow->inval();
});
fCommands.addCommand('c', "Modes", "Cycle color mode", [this]() {
if (!fColorSpace) {
// Legacy -> sRGB
this->setColorMode(kN32_SkColorType, SkColorSpace::MakeSRGB());
} else if (kN32_SkColorType == fColorType) {
// sRGB -> F16 sRGB
this->setColorMode(kRGBA_F16_SkColorType, SkColorSpace::MakeSRGBLinear());
} else {
// F16 sRGB -> Legacy
this->setColorMode(kN32_SkColorType, nullptr);
}
});
fCommands.addCommand(Window::Key::kRight, "Right", "Navigation", "Next slide", [this]() {
int previousSlide = fCurrentSlide;
fCurrentSlide++;
if (fCurrentSlide >= fSlides.count()) {
fCurrentSlide = 0;
}
this->setupCurrentSlide(previousSlide);
});
fCommands.addCommand(Window::Key::kLeft, "Left", "Navigation", "Previous slide", [this]() {
int previousSlide = fCurrentSlide;
fCurrentSlide--;
if (fCurrentSlide < 0) {
fCurrentSlide = fSlides.count() - 1;
}
this->setupCurrentSlide(previousSlide);
});
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]() {
#if defined(SK_BUILD_FOR_WIN) || defined(SK_BUILD_FOR_MAC)
if (sk_app::Window::kRaster_BackendType == fBackendType) {
fBackendType = sk_app::Window::kNativeGL_BackendType;
#ifdef SK_VULKAN
} else if (sk_app::Window::kNativeGL_BackendType == fBackendType) {
fBackendType = sk_app::Window::kVulkan_BackendType;
#endif
} else {
fBackendType = sk_app::Window::kRaster_BackendType;
}
#elif defined(SK_BUILD_FOR_UNIX)
// Switching to and from Vulkan is problematic on Linux so disabled for now
if (sk_app::Window::kRaster_BackendType == fBackendType) {
fBackendType = sk_app::Window::kNativeGL_BackendType;
} else if (sk_app::Window::kNativeGL_BackendType == fBackendType) {
fBackendType = sk_app::Window::kRaster_BackendType;
}
#endif
fWindow->detach();
#if defined(SK_BUILD_FOR_WIN) && defined(SK_VULKAN)
// Switching from OpenGL to Vulkan in the same window is problematic at this point on
// Windows, so we just delete the window and recreate it.
if (sk_app::Window::kVulkan_BackendType == fBackendType) {
delete fWindow;
fWindow = Window::CreateNativeWindow(nullptr);
// re-register callbacks
fCommands.attach(fWindow);
fWindow->registerPaintFunc(on_paint_handler, this);
fWindow->registerTouchFunc(on_touch_handler, this);
fWindow->registerUIStateChangedFunc(on_ui_state_changed_handler, this);
fWindow->registerMouseFunc(on_mouse_handler, this);
fWindow->registerMouseWheelFunc(on_mouse_wheel_handler, this);
fWindow->registerKeyFunc(on_key_handler, this);
fWindow->registerCharFunc(on_char_handler, this);
}
#endif
fWindow->attach(fBackendType, DisplayParams());
this->updateTitle();
fWindow->inval();
fWindow->show();
});
// set up slides
this->initSlides();
this->setStartupSlide();
if (FLAGS_list) {
this->listNames();
}
fAnimTimer.run();
// ImGui initialization:
ImGuiIO& io = ImGui::GetIO();
io.DisplaySize.x = static_cast<float>(fWindow->width());
io.DisplaySize.y = static_cast<float>(fWindow->height());
// Keymap...
io.KeyMap[ImGuiKey_Tab] = (int)Window::Key::kTab;
io.KeyMap[ImGuiKey_LeftArrow] = (int)Window::Key::kLeft;
io.KeyMap[ImGuiKey_RightArrow] = (int)Window::Key::kRight;
io.KeyMap[ImGuiKey_UpArrow] = (int)Window::Key::kUp;
io.KeyMap[ImGuiKey_DownArrow] = (int)Window::Key::kDown;
io.KeyMap[ImGuiKey_PageUp] = (int)Window::Key::kPageUp;
io.KeyMap[ImGuiKey_PageDown] = (int)Window::Key::kPageDown;
io.KeyMap[ImGuiKey_Home] = (int)Window::Key::kHome;
io.KeyMap[ImGuiKey_End] = (int)Window::Key::kEnd;
io.KeyMap[ImGuiKey_Delete] = (int)Window::Key::kDelete;
io.KeyMap[ImGuiKey_Backspace] = (int)Window::Key::kBack;
io.KeyMap[ImGuiKey_Enter] = (int)Window::Key::kOK;
io.KeyMap[ImGuiKey_Escape] = (int)Window::Key::kEscape;
io.KeyMap[ImGuiKey_A] = (int)Window::Key::kA;
io.KeyMap[ImGuiKey_C] = (int)Window::Key::kC;
io.KeyMap[ImGuiKey_V] = (int)Window::Key::kV;
io.KeyMap[ImGuiKey_X] = (int)Window::Key::kX;
io.KeyMap[ImGuiKey_Y] = (int)Window::Key::kY;
io.KeyMap[ImGuiKey_Z] = (int)Window::Key::kZ;
int w, h;
unsigned char* pixels;
io.Fonts->GetTexDataAsAlpha8(&pixels, &w, &h);
SkImageInfo info = SkImageInfo::MakeA8(w, h);
SkPixmap pmap(info, pixels, info.minRowBytes());
SkMatrix localMatrix = SkMatrix::MakeScale(1.0f / w, 1.0f / h);
auto fontImage = SkImage::MakeFromRaster(pmap, nullptr, nullptr);
auto fontShader = fontImage->makeShader(SkShader::kClamp_TileMode, SkShader::kClamp_TileMode,
&localMatrix);
fImGuiFontPaint.setShader(fontShader);
fImGuiFontPaint.setColor(SK_ColorWHITE);
fImGuiFontPaint.setFilterQuality(kLow_SkFilterQuality);
io.Fonts->TexID = &fImGuiFontPaint;
fWindow->show();
}
void Viewer::initSlides() {
fAllSlideNames = Json::Value(Json::arrayValue);
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(slide);
}
gms = gms->next();
}
// reverse array
for (int i = 0; i < fSlides.count()/2; ++i) {
sk_sp<Slide> temp = fSlides[i];
fSlides[i] = fSlides[fSlides.count() - i - 1];
fSlides[fSlides.count() - i - 1] = temp;
}
// 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);
}
}
}
}
Viewer::~Viewer() {
fWindow->detach();
delete fWindow;
}
void Viewer::updateTitle() {
SkString title("Viewer: ");
title.append(fSlides[fCurrentSlide]->getName());
title.appendf(" %s", sk_tool_utils::colortype_name(fColorType));
// TODO: Find a short string to describe the gamut of the color space?
if (fColorSpace) {
title.append(" ColorManaged");
}
title.append(kBackendTypeStrings[fBackendType]);
fWindow->setTitle(title.c_str());
}
void Viewer::setStartupSlide() {
if (!FLAGS_slide.isEmpty()) {
int count = fSlides.count();
for (int i = 0; i < count; i++) {
if (fSlides[i]->getName().equals(FLAGS_slide[0])) {
fCurrentSlide = i;
return;
}
}
fprintf(stderr, "Unknown slide \"%s\"\n", FLAGS_slide[0]);
this->listNames();
}
fCurrentSlide = 0;
}
void Viewer::listNames() {
int count = fSlides.count();
SkDebugf("All Slides:\n");
for (int i = 0; i < count; i++) {
SkDebugf(" %s\n", fSlides[i]->getName().c_str());
}
}
void Viewer::setupCurrentSlide(int previousSlide) {
if (fCurrentSlide == previousSlide) {
return; // no change; do nothing
}
// prepare dimensions for image slides
fSlides[fCurrentSlide]->load(SkIntToScalar(fWindow->width()), SkIntToScalar(fWindow->height()));
fGesture.reset();
fDefaultMatrix.reset();
fDefaultMatrixInv.reset();
if (fWindow->supportsContentRect() && fWindow->scaleContentToFit()) {
const SkRect contentRect = fWindow->getContentRect();
const SkISize slideSize = fSlides[fCurrentSlide]->getDimensions();
const SkRect slideBounds = SkRect::MakeIWH(slideSize.width(), slideSize.height());
if (contentRect.width() > 0 && contentRect.height() > 0) {
fDefaultMatrix.setRectToRect(slideBounds, contentRect, SkMatrix::kStart_ScaleToFit);
SkAssertResult(fDefaultMatrix.invert(&fDefaultMatrixInv));
}
}
if (fWindow->supportsContentRect()) {
const SkISize slideSize = fSlides[fCurrentSlide]->getDimensions();
SkRect windowRect = fWindow->getContentRect();
fDefaultMatrixInv.mapRect(&windowRect);
fGesture.setTransLimit(SkRect::MakeWH(SkIntToScalar(slideSize.width()),
SkIntToScalar(slideSize.height())),
windowRect);
}
this->updateTitle();
this->updateUIState();
if (previousSlide >= 0) {
fSlides[previousSlide]->unload();
}
fWindow->inval();
}
#define MAX_ZOOM_LEVEL 8
#define MIN_ZOOM_LEVEL -8
void Viewer::changeZoomLevel(float delta) {
fZoomLevel += delta;
if (fZoomLevel > 0) {
fZoomLevel = SkMinScalar(fZoomLevel, MAX_ZOOM_LEVEL);
fZoomScale = fZoomLevel + SK_Scalar1;
} else if (fZoomLevel < 0) {
fZoomLevel = SkMaxScalar(fZoomLevel, MIN_ZOOM_LEVEL);
fZoomScale = SK_Scalar1 / (SK_Scalar1 - fZoomLevel);
} else {
fZoomScale = SK_Scalar1;
}
}
SkMatrix Viewer::computeMatrix() {
SkMatrix m;
m.reset();
if (fZoomLevel) {
SkPoint center;
//m = this->getLocalMatrix();//.invert(&m);
m.mapXY(fZoomCenterX, fZoomCenterY, &center);
SkScalar cx = center.fX;
SkScalar cy = center.fY;
m.setTranslate(-cx, -cy);
m.postScale(fZoomScale, fZoomScale);
m.postTranslate(cx, cy);
}
m.preConcat(fGesture.localM());
m.preConcat(fGesture.globalM());
return m;
}
void Viewer::setColorMode(SkColorType colorType, sk_sp<SkColorSpace> colorSpace) {
fColorType = colorType;
fColorSpace = std::move(colorSpace);
// When we're in color managed mode, we tag our window surface as sRGB. If we've switched into
// or out of legacy mode, we need to update our window configuration.
DisplayParams params = fWindow->getDisplayParams();
if (SkToBool(fColorSpace) != SkToBool(params.fColorSpace)) {
params.fColorSpace = fColorSpace ? SkColorSpace::MakeSRGB() : nullptr;
fWindow->setDisplayParams(params);
}
this->updateTitle();
fWindow->inval();
}
void Viewer::drawSlide(SkCanvas* canvas) {
int count = canvas->save();
if (fWindow->supportsContentRect()) {
SkRect contentRect = fWindow->getContentRect();
canvas->clipRect(contentRect);
canvas->translate(contentRect.fLeft, contentRect.fTop);
}
// By default, we render directly into the window's surface/canvas
SkCanvas* slideCanvas = canvas;
fLastImage.reset();
// If we're in F16, or the gamut isn't sRGB, or we're zooming, we need to render offscreen
sk_sp<SkSurface> offscreenSurface = nullptr;
if (kRGBA_F16_SkColorType == fColorType || fShowZoomWindow ||
(fColorSpace && fColorSpace != SkColorSpace::MakeSRGB())) {
SkImageInfo info = SkImageInfo::Make(fWindow->width(), fWindow->height(), fColorType,
kPremul_SkAlphaType, fColorSpace);
offscreenSurface = canvas->makeSurface(info);
slideCanvas = offscreenSurface->getCanvas();
}
slideCanvas->clear(SK_ColorWHITE);
slideCanvas->concat(fDefaultMatrix);
slideCanvas->concat(computeMatrix());
// Time the painting logic of the slide
double startTime = SkTime::GetMSecs();
fSlides[fCurrentSlide]->draw(slideCanvas);
fPaintTimes[fCurrentMeasurement] = SkTime::GetMSecs() - startTime;
// Force a flush so we can time that, too
startTime = SkTime::GetMSecs();
slideCanvas->flush();
fFlushTimes[fCurrentMeasurement] = SkTime::GetMSecs() - startTime;
// 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> cs = (kRGBA_F16_SkColorType == fColorType)
? SkColorSpace::MakeSRGBLinear() : SkColorSpace::MakeSRGB();
auto retaggedImage = SkImageMakeRasterCopyAndAssignColorSpace(fLastImage.get(), cs.get());
canvas->drawImage(retaggedImage, 0, 0);
}
canvas->restoreToCount(count);
}
void Viewer::onPaint(SkCanvas* canvas) {
// We have to wait until the first draw to make sure the window size is set correctly
if (!fSetupFirstFrame) {
// set up first frame
setupCurrentSlide(-1);
fSetupFirstFrame = true;
}
// Update ImGui input
ImGuiIO& io = ImGui::GetIO();
io.DeltaTime = 1.0f / 60.0f;
io.DisplaySize.x = static_cast<float>(fWindow->width());
io.DisplaySize.y = static_cast<float>(fWindow->height());
io.KeyAlt = io.KeysDown[static_cast<int>(Window::Key::kOption)];
io.KeyCtrl = io.KeysDown[static_cast<int>(Window::Key::kCtrl)];
io.KeyShift = io.KeysDown[static_cast<int>(Window::Key::kShift)];
ImGui::NewFrame();
drawSlide(canvas);
// Advance our timing bookkeeping
fCurrentMeasurement = (fCurrentMeasurement + 1) & (kMeasurementCount - 1);
SkASSERT(fCurrentMeasurement < kMeasurementCount);
// Draw any overlays or UI that we don't want timed
if (fDisplayStats) {
drawStats(canvas);
}
fCommands.drawHelp(canvas);
drawImGui(canvas);
// Update the FPS
updateUIState();
}
bool Viewer::onTouch(intptr_t owner, Window::InputState state, float x, float y) {
void* castedOwner = reinterpret_cast<void*>(owner);
SkPoint touchPoint = fDefaultMatrixInv.mapXY(x, y);
switch (state) {
case Window::kUp_InputState: {
fGesture.touchEnd(castedOwner);
break;
}
case Window::kDown_InputState: {
fGesture.touchBegin(castedOwner, touchPoint.fX, touchPoint.fY);
break;
}
case Window::kMove_InputState: {
fGesture.touchMoved(castedOwner, touchPoint.fX, touchPoint.fY);
break;
}
}
fWindow->inval();
return true;
}
void Viewer::drawStats(SkCanvas* canvas) {
static const float kPixelPerMS = 2.0f;
static const int kDisplayWidth = 130;
static const int kDisplayHeight = 100;
static const int kDisplayPadding = 10;
static const int kGraphPadding = 3;
static const SkScalar kBaseMS = 1000.f / 60.f; // ms/frame to hit 60 fps
SkISize canvasSize = canvas->getBaseLayerSize();
SkRect rect = SkRect::MakeXYWH(SkIntToScalar(canvasSize.fWidth-kDisplayWidth-kDisplayPadding),
SkIntToScalar(kDisplayPadding),
SkIntToScalar(kDisplayWidth), SkIntToScalar(kDisplayHeight));
SkPaint paint;
canvas->save();
if (fWindow->supportsContentRect()) {
SkRect contentRect = fWindow->getContentRect();
canvas->clipRect(contentRect);
canvas->translate(contentRect.fLeft, contentRect.fTop);
}
canvas->clipRect(rect);
paint.setColor(SK_ColorBLACK);
canvas->drawRect(rect, paint);
// draw the 16ms line
paint.setColor(SK_ColorLTGRAY);
canvas->drawLine(rect.fLeft, rect.fBottom - kBaseMS*kPixelPerMS,
rect.fRight, rect.fBottom - kBaseMS*kPixelPerMS, paint);
paint.setColor(SK_ColorRED);
paint.setStyle(SkPaint::kStroke_Style);
canvas->drawRect(rect, paint);
int x = SkScalarTruncToInt(rect.fLeft) + kGraphPadding;
const int xStep = 2;
int i = fCurrentMeasurement;
do {
// Round to nearest values
int animateHeight = (int)(fAnimateTimes[i] * kPixelPerMS + 0.5);
int paintHeight = (int)(fPaintTimes[i] * kPixelPerMS + 0.5);
int flushHeight = (int)(fFlushTimes[i] * kPixelPerMS + 0.5);
int startY = SkScalarTruncToInt(rect.fBottom);
int endY = startY - flushHeight;
paint.setColor(SK_ColorRED);
canvas->drawLine(SkIntToScalar(x), SkIntToScalar(startY),
SkIntToScalar(x), SkIntToScalar(endY), paint);
startY = endY;
endY = startY - paintHeight;
paint.setColor(SK_ColorGREEN);
canvas->drawLine(SkIntToScalar(x), SkIntToScalar(startY),
SkIntToScalar(x), SkIntToScalar(endY), paint);
startY = endY;
endY = startY - animateHeight;
paint.setColor(SK_ColorMAGENTA);
canvas->drawLine(SkIntToScalar(x), SkIntToScalar(startY),
SkIntToScalar(x), SkIntToScalar(endY), paint);
i++;
i &= (kMeasurementCount - 1); // fast mod
x += xStep;
} while (i != fCurrentMeasurement);
canvas->restore();
}
void Viewer::drawImGui(SkCanvas* canvas) {
// Support drawing the ImGui demo window. Superfluous, but gives a good idea of what's possible
if (fShowImGuiTestWindow) {
ImGui::ShowTestWindow(&fShowImGuiTestWindow);
}
if (fShowImGuiDebugWindow) {
if (ImGui::Begin("Debug", &fShowImGuiDebugWindow)) {
if (ImGui::CollapsingHeader("Slide")) {
static ImGuiTextFilter filter;
filter.Draw();
int previousSlide = fCurrentSlide;
fCurrentSlide = 0;
for (auto slide : fSlides) {
if (filter.PassFilter(slide->getName().c_str())) {
ImGui::BulletText("%s", slide->getName().c_str());
if (ImGui::IsItemClicked()) {
setupCurrentSlide(previousSlide);
break;
}
}
++fCurrentSlide;
}
if (fCurrentSlide >= fSlides.count()) {
fCurrentSlide = previousSlide;
}
}
}
ImGui::End();
}
SkPaint zoomImagePaint;
if (fShowZoomWindow && fLastImage) {
if (ImGui::Begin("Zoom", &fShowZoomWindow, ImVec2(200, 200))) {
static int zoomFactor = 4;
ImGui::SliderInt("Scale", &zoomFactor, 1, 16);
zoomImagePaint.setShader(fLastImage->makeShader(SkShader::kClamp_TileMode,
SkShader::kClamp_TileMode));
zoomImagePaint.setColor(SK_ColorWHITE);
// Zoom by shrinking the corner UVs towards the mouse cursor
ImVec2 mousePos = ImGui::GetMousePos();
ImVec2 avail = ImGui::GetContentRegionAvail();
ImVec2 zoomHalfExtents = ImVec2((avail.x * 0.5f) / zoomFactor,
(avail.y * 0.5f) / zoomFactor);
ImGui::Image(&zoomImagePaint, avail,
ImVec2(mousePos.x - zoomHalfExtents.x, mousePos.y - zoomHalfExtents.y),
ImVec2(mousePos.x + zoomHalfExtents.x, mousePos.y + zoomHalfExtents.y));
}
ImGui::End();
}
// This causes ImGui to rebuild vertex/index data based on all immediate-mode commands
// (widgets, etc...) that have been issued
ImGui::Render();
// Then we fetch the most recent data, and convert it so we can render with Skia
const ImDrawData* drawData = ImGui::GetDrawData();
SkTDArray<SkPoint> pos;
SkTDArray<SkPoint> uv;
SkTDArray<SkColor> color;
for (int i = 0; i < drawData->CmdListsCount; ++i) {
const ImDrawList* drawList = drawData->CmdLists[i];
// De-interleave all vertex data (sigh), convert to Skia types
pos.rewind(); uv.rewind(); color.rewind();
for (int i = 0; i < drawList->VtxBuffer.size(); ++i) {
const ImDrawVert& vert = drawList->VtxBuffer[i];
pos.push(SkPoint::Make(vert.pos.x, vert.pos.y));
uv.push(SkPoint::Make(vert.uv.x, vert.uv.y));
color.push(vert.col);
}
// ImGui colors are RGBA
SkSwapRB(color.begin(), color.begin(), color.count());
int indexOffset = 0;
// Draw everything with canvas.drawVertices...
for (int j = 0; j < drawList->CmdBuffer.size(); ++j) {
const ImDrawCmd* drawCmd = &drawList->CmdBuffer[j];
// TODO: Find min/max index for each draw, so we know how many vertices (sigh)
if (drawCmd->UserCallback) {
drawCmd->UserCallback(drawList, drawCmd);
} else {
SkPaint* paint = static_cast<SkPaint*>(drawCmd->TextureId);
SkASSERT(paint);
canvas->save();
canvas->clipRect(SkRect::MakeLTRB(drawCmd->ClipRect.x, drawCmd->ClipRect.y,
drawCmd->ClipRect.z, drawCmd->ClipRect.w));
canvas->drawVertices(SkCanvas::kTriangles_VertexMode, drawList->VtxBuffer.size(),
pos.begin(), uv.begin(), color.begin(),
drawList->IdxBuffer.begin() + indexOffset, drawCmd->ElemCount,
*paint);
indexOffset += drawCmd->ElemCount;
canvas->restore();
}
}
}
}
void Viewer::onIdle() {
double startTime = SkTime::GetMSecs();
fAnimTimer.updateTime();
bool animateWantsInval = fSlides[fCurrentSlide]->animate(fAnimTimer);
fAnimateTimes[fCurrentMeasurement] = SkTime::GetMSecs() - startTime;
ImGuiIO& io = ImGui::GetIO();
if (animateWantsInval || fDisplayStats || fRefresh || io.MetricsActiveWindows) {
fWindow->inval();
}
}
void Viewer::updateUIState() {
// 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));
}
// 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;
int idx = (fCurrentMeasurement + (kMeasurementCount - 1)) & (kMeasurementCount - 1);
fpsState[kValue] = SkStringPrintf("%8.3lf ms\n\nA %8.3lf\nP %8.3lf\nF%8.3lf",
fAnimateTimes[idx] + fPaintTimes[idx] + fFlushTimes[idx],
fAnimateTimes[idx],
fPaintTimes[idx],
fFlushTimes[idx]).c_str();
fpsState[kOptions] = Json::Value(Json::arrayValue);
Json::Value state(Json::arrayValue);
state.append(slideState);
state.append(backendState);
state.append(softkeyState);
state.append(fpsState);
fWindow->setUIState(state);
}
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)) {
int previousSlide = fCurrentSlide;
fCurrentSlide = 0;
for(auto slide : fSlides) {
if (slide->getName().equals(stateValue)) {
setupCurrentSlide(previousSlide);
break;
}
fCurrentSlide++;
}
if (fCurrentSlide >= fSlides.count()) {
fCurrentSlide = previousSlide;
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(fBackendType, DisplayParams());
fWindow->inval();
updateTitle();
updateUIState();
}
break;
}
}
} else if (stateName.equals(kSoftkeyStateName)) {
if (!stateValue.equals(kSoftkeyHint)) {
fCommands.onSoftkey(stateValue);
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;
}
return fCommands.onChar(c, modifiers);
}
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