Add test with GLFW framework
BUG=skia:
Review URL: https://codereview.chromium.org/1367403006
diff --git a/experimental/GLFWTest/.gitignore b/experimental/GLFWTest/.gitignore
new file mode 100644
index 0000000..7bf8ccf
--- /dev/null
+++ b/experimental/GLFWTest/.gitignore
@@ -0,0 +1,2 @@
+project.xcworkspace/
+xcuserdata/
diff --git a/experimental/GLFWTest/GLFWTest.xcodeproj/project.pbxproj b/experimental/GLFWTest/GLFWTest.xcodeproj/project.pbxproj
new file mode 100644
index 0000000..259ad2d
--- /dev/null
+++ b/experimental/GLFWTest/GLFWTest.xcodeproj/project.pbxproj
@@ -0,0 +1,411 @@
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diff --git a/experimental/GLFWTest/Info.plist b/experimental/GLFWTest/Info.plist
new file mode 100644
index 0000000..cbd8696
--- /dev/null
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@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+ <key>CFBundleDevelopmentRegion</key>
+ <string>en</string>
+ <key>CFBundleExecutable</key>
+ <string>$(EXECUTABLE_NAME)</string>
+ <key>CFBundleIconFile</key>
+ <string></string>
+ <key>CFBundleIdentifier</key>
+ <string>Google.$(PRODUCT_NAME:rfc1034identifier)</string>
+ <key>CFBundleInfoDictionaryVersion</key>
+ <string>6.0</string>
+ <key>CFBundleName</key>
+ <string>$(PRODUCT_NAME)</string>
+ <key>CFBundlePackageType</key>
+ <string>APPL</string>
+ <key>CFBundleShortVersionString</key>
+ <string>1.0</string>
+ <key>CFBundleSignature</key>
+ <string>????</string>
+ <key>CFBundleVersion</key>
+ <string>1</string>
+ <key>LSMinimumSystemVersion</key>
+ <string>$(MACOSX_DEPLOYMENT_TARGET)</string>
+ <key>NSHumanReadableCopyright</key>
+ <string>Copyright © 2015 Google. All rights reserved.</string>
+ <key>NSMainStoryboardFile</key>
+ <string>Main</string>
+ <key>NSPrincipalClass</key>
+ <string>NSApplication</string>
+</dict>
+</plist>
diff --git a/experimental/GLFWTest/README.txt b/experimental/GLFWTest/README.txt
new file mode 100644
index 0000000..2be3f24
--- /dev/null
+++ b/experimental/GLFWTest/README.txt
@@ -0,0 +1,6 @@
+This test is Mac-only for now. Adding Linux or Win support shouldn’t be that difficult — it just needs a project file.
+
+To run this demo, you’ll need to do three things:
+1) Get GLFW 3.1.1 or later, and install it at third_party/externals/glfw. You’ll need to run ‘cmake’ in that directory to build the makefiles, and then ‘make’ to build the libglfw.a library.
+2) Build the skia libraries via the command line (by running ‘ninja -C out/<config> dm’, for example.
+3) Get a ship.png file. Place it in this directory.
diff --git a/experimental/GLFWTest/glfw_main.cpp b/experimental/GLFWTest/glfw_main.cpp
new file mode 100644
index 0000000..bf91760
--- /dev/null
+++ b/experimental/GLFWTest/glfw_main.cpp
@@ -0,0 +1,179 @@
+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "GLFW/glfw3.h"
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "GrContext.h"
+
+#include "SkCanvas.h"
+#include "SkImage.h"
+#include "SkRSXform.h"
+#include "SkSurface.h"
+#include "Timer.h"
+
+GrContext* sContext = nullptr;
+SkSurface* sSurface = nullptr;
+
+static void error_callback(int error, const char* description) {
+ fputs(description, stderr);
+}
+
+static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods) {
+ if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
+ glfwSetWindowShouldClose(window, GL_TRUE);
+}
+
+
+static void init_skia(int w, int h) {
+ sContext = GrContext::Create(kOpenGL_GrBackend, 0);
+
+ GrBackendRenderTargetDesc desc;
+ desc.fWidth = w;
+ desc.fHeight = h;
+ desc.fConfig = kSkia8888_GrPixelConfig;
+ desc.fOrigin = kBottomLeft_GrSurfaceOrigin;
+ desc.fSampleCnt = 1;
+ desc.fStencilBits = 0;
+ desc.fRenderTargetHandle = 0; // assume default framebuffer
+
+ sSurface = SkSurface::NewFromBackendRenderTarget(sContext, desc, NULL);
+}
+
+static void cleanup_skia() {
+ delete sSurface;
+ delete sContext;
+}
+
+const int kGrid = 100;
+const int kWidth = 960;
+const int kHeight = 640;
+
+int main(void) {
+ GLFWwindow* window;
+ glfwSetErrorCallback(error_callback);
+ if (!glfwInit()) {
+ exit(EXIT_FAILURE);
+ }
+
+ glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+ glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
+ glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
+ glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+ glfwWindowHint(GLFW_SRGB_CAPABLE, GL_TRUE);
+
+ window = glfwCreateWindow(kWidth, kHeight, "Simple example", NULL, NULL);
+ if (!window) {
+ glfwTerminate();
+ exit(EXIT_FAILURE);
+ }
+ glfwMakeContextCurrent(window);
+
+ init_skia(kWidth, kHeight);
+
+ SkAutoTUnref<SkImage> atlas;
+ SkRSXform xform[kGrid*kGrid+1];
+ SkRect tex[kGrid*kGrid+1];
+ WallTimer timer;
+ float times[32];
+ int currentTime;
+
+ SkAutoTUnref<SkData> imageData(SkData::NewFromFileName("ship.png"));
+ atlas.reset(SkImage::NewFromEncoded(imageData));
+ if (!atlas) {
+ SkDebugf("\nCould not decode file ship.png\n");
+
+ cleanup_skia();
+ glfwDestroyWindow(window);
+ glfwTerminate();
+ exit(EXIT_FAILURE);
+ }
+
+ SkScalar anchorX = atlas->width()*0.5f;
+ SkScalar anchorY = atlas->height()*0.5f;
+ int currIndex = 0;
+ for (int x = 0; x < kGrid; x++) {
+ for (int y = 0; y < kGrid; y++) {
+ float xPos = (x / (kGrid - 1.0)) * kWidth;
+ float yPos = (y / (kGrid - 1.0)) * kWidth;
+
+ tex[currIndex] = SkRect::MakeLTRB(0.0f, 0.0f, atlas->width(), atlas->height());
+ xform[currIndex] = SkRSXform::MakeFromRadians(2.0f, SK_ScalarPI*0.5f,
+ xPos, yPos, anchorX, anchorY);
+ currIndex++;
+ }
+ }
+ tex[currIndex] = SkRect::MakeLTRB(0.0f, 0.0f, atlas->width(), atlas->height());
+ xform[currIndex] = SkRSXform::MakeFromRadians(2.0f, SK_ScalarPI*0.5f,
+ kWidth*0.5f, kHeight*0.5f, anchorX, anchorY);
+
+ currentTime = 0;
+
+ glfwSwapInterval(1);
+ glfwSetKeyCallback(window, key_callback);
+
+ // Draw to the surface via its SkCanvas.
+ SkCanvas* canvas = sSurface->getCanvas(); // We don't manage this pointer's lifetime.
+ SkPaint paint;
+ paint.setFilterQuality(kLow_SkFilterQuality);
+ paint.setColor(SK_ColorWHITE);
+ paint.setTextSize(15.0f);
+
+ while (!glfwWindowShouldClose(window)) {
+ const float kCosDiff = 0.99984769515f;
+ const float kSinDiff = 0.01745240643f;
+
+ timer.start();
+
+ glfwPollEvents();
+
+ float meanTime = 0.0f;
+ for (int i = 0; i < 32; ++i) {
+ meanTime += times[i];
+ }
+ meanTime /= 32.f;
+ char outString[64];
+ float fps = 1000.f/meanTime;
+ sprintf(outString, "fps: %f ms: %f", fps, meanTime);
+
+ for (int i = 0; i < kGrid*kGrid+1; ++i) {
+ SkScalar c = xform[i].fSCos;
+ SkScalar s = xform[i].fSSin;
+
+ SkScalar dx = c*anchorX - s*anchorY;
+ SkScalar dy = s*anchorX + c*anchorY;
+
+ xform[i].fSCos = kCosDiff*c - kSinDiff*s;
+ xform[i].fSSin = kSinDiff*c + kCosDiff*s;
+
+ dx -= xform[i].fSCos*anchorX - xform[i].fSSin*anchorY;
+ dy -= xform[i].fSSin*anchorX + xform[i].fSCos*anchorY;
+ xform[i].fTx += dx;
+ xform[i].fTy += dy;
+ }
+
+ canvas->clear(SK_ColorBLACK);
+ canvas->drawAtlas(atlas, xform, tex, nullptr, kGrid*kGrid+1, SkXfermode::kSrcOver_Mode,
+ nullptr, &paint);
+ canvas->drawText(outString, strlen(outString), 100.f, 100.f, paint);
+
+ canvas->flush();
+
+ timer.end();
+ times[currentTime] = (float)(timer.fWall);
+ currentTime = (currentTime + 1) & 0x1f;
+
+ glfwSwapBuffers(window);
+ }
+
+ cleanup_skia();
+
+ glfwDestroyWindow(window);
+ glfwTerminate();
+ exit(EXIT_SUCCESS);
+}