Add config options to run different GPU APIs to dm and nanobench

tools/flags/SkCommonFlagsConfig.cpp

Index: tools/flags/SkCommonFlagsConfig.cpp
diff --git a/tools/flags/SkCommonFlagsConfig.cpp b/tools/flags/SkCommonFlagsConfig.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..e9e2d754a634126b21987bd858755767cf8405c2
--- /dev/null
+++ b/tools/flags/SkCommonFlagsConfig.cpp
@@ -0,0 +1,336 @@
+/*
+ * 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 "SkCommonFlagsConfig.h"
+
+#include <stdlib.h>
+
+static const char defaultConfigs[] =
+    "565 8888 gpu nonrendering"
+#if SK_ANGLE
+#ifdef SK_BUILD_FOR_WIN
+    " angle"
+#endif
+#endif
+#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
+    " hwui"
+#endif
+    ;
+
+static const char configHelp[] =
+    "Options: 565 8888 debug gpu gpudebug gpudft gpunull "
+    "msaa16 msaa4 nonrendering null nullgpu nvprmsaa16 nvprmsaa4 "
+    "pdf pdf_poppler skp svg xps"
+#if SK_ANGLE
+#ifdef SK_BUILD_FOR_WIN
+    " angle"
+#endif
+    " angle-gl"
+#endif
+#if SK_COMMAND_BUFFER
+    " commandbuffer"
+#endif
+#if SK_MESA
+    " mesa"
+#endif
+#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
+    " hwui"
+#endif
+    " or use extended form 'backend(option=value,...)'.\n";
+
+static const char configExtendedHelp[] =
+    "Extended form: 'backend(option=value,...)'\n\n"
+    "Possible backends and options:\n"
+#if SK_SUPPORT_GPU
+    "\n"
+    "gpu(api=string,dit=bool,nvpr=bool,samples=int)\tGPU backend\n"
+    "\tapi\ttype: string\tdefault: native.\n"
+    "\t    Select graphics API to use with gpu backend.\n"
+    "\t    Options:\n"
+    "\t\tnative\t\t\tUse platform default OpenGL or OpenGL ES backend.\n"
+    "\t\tgl    \t\t\tUse OpenGL.\n"
+    "\t\tgles  \t\t\tUse OpenGL ES.\n"
+    "\t\tdebug \t\t\tUse debug OpenGL.\n"
+    "\t\tnull  \t\t\tUse null OpenGL.\n"
+#if SK_ANGLE
+#ifdef SK_BUILD_FOR_WIN
+    "\t\tangle\t\t\tUse ANGLE DirectX.\n"
+#endif
+    "\t\tangle-gl\t\t\tUse ANGLE OpenGL.\n"
+#endif
+#if SK_COMMAND_BUFFER
+    "\t\tcommandbuffer\t\tUse command buffer.\n"
+#endif
+#if SK_MESA
+    "\t\tmesa\t\t\tUse MESA.\n"
+#endif
+    "\tdit\ttype: bool\tdefault: false.\n"
+    "\t    Use device independent text.\n"
+    "\tnvpr\ttype: bool\tdefault: false.\n"
+    "\t    Use NV_path_rendering OpenGL and OpenGL ES extension.\n"
+    "\tsamples\ttype: int\tdefault: 0.\n"
+    "\t    Use multisampling with N samples.\n"
+    "\n"
+    "Predefined configs:\n\n"
+    "\tgpu      \t= gpu()\n"
+    "\tmsaa4    \t= gpu(samples=4)\n"
+    "\tmsaa16   \t= gpu(samples=16)\n"
+    "\tnvprmsaa4\t= gpu(nvpr=true,samples=4)\n"
+    "\tnvprmsaa16\t= gpu(nvpr=true,samples=16)\n"
+    "\tgpudft    \t= gpu(dit=true)\n"
+    "\tgpudebug  \t= gpu(api=debug)\n"
+    "\tgpunull   \t= gpu(api=null)\n"
+    "\tdebug     \t= gpu(api=debug)\n"
+    "\tnullgpu   \t= gpu(api=null)\n"
+#if SK_ANGLE
+#ifdef SK_BUILD_FOR_WIN
+    "\tangle     \t= gpu(api=angle)\n"
+#endif
+    "\tangle-gl  \t= gpu(api=angle-gl)\n"
+#endif
+#if SK_COMMAND_BUFFER
+    "\tcommandbuffer\t= gpu(api=commandbuffer)\n"
+#endif
+#if SK_MESA
+    "\tmesa      \t= gpu(api=mesa)\n"
+#endif
+#endif
+    ;
+
+DEFINE_extended_string(config, defaultConfigs, configHelp, configExtendedHelp);
+
+static const struct {
+    const char* predefinedConfig;
+    const char* backend;
+    const char* options;
+} gPredefinedConfigs[] = {
+#if SK_SUPPORT_GPU
+    { "gpu",        "gpu", "" },
+    { "msaa4",      "gpu", "samples=4" },
+    { "msaa16",     "gpu", "samples=16" },
+    { "nvprmsaa4",  "gpu", "nvpr=true,samples=4" },
+    { "nvprmsaa16", "gpu", "nvpr=true,samples=16" },
+    { "gpudft",     "gpu", "dit=true" },
+    { "gpudebug",   "gpu", "api=debug" },
+    { "gpunull",    "gpu", "api=null" },
+    { "debug",      "gpu", "api=debug" },
+    { "nullgpu",    "gpu", "api=null" }
+#if SK_ANGLE
+#ifdef SK_BUILD_FOR_WIN
+    , { "angle",      "gpu", "api=angle" }
+#endif
+    , { "angle-gl",   "gpu", "api=angle-gl" }
+#endif
+#if SK_COMMAND_BUFFER
+    , { "commandbuffer", "gpu", "api=commandbuffer" }
+#endif
+#if SK_MESA
+    , { "mesa", "gpu", "api=mesa" }
+#endif
+#else
+    { "", "", "" }
+#endif
+};
+
+SkCommandLineConfig::SkCommandLineConfig(const SkString& tag, const SkString& backend,
+                                         const SkTArray<SkString>& viaParts)
+        : fTag(tag)
+        , fBackend(backend)
+        , fViaParts(viaParts) {
+}
+SkCommandLineConfig::~SkCommandLineConfig() {
+}
+
+#if SK_SUPPORT_GPU
+SkCommandLineConfigGpu::SkCommandLineConfigGpu(
+    const SkString& tag, const SkTArray<SkString>& viaParts,
+    ContextType contextType, bool useNVPR, bool useDIText, int samples)
+        : SkCommandLineConfig(tag, SkString("gpu"), viaParts)
+        , fContextType(contextType)
+        , fUseNVPR(useNVPR)
+        , fUseDIText(useDIText)
+        , fSamples(samples) {
+}
+static bool parse_option_int(const SkString& value, int* outInt) {
+    if (value.isEmpty()) {
+        return false;
+    }
+    char* endptr = nullptr;
+    long intValue = strtol(value.c_str(), &endptr, 10);
+    if (*endptr != '\0') {
+        return false;
+    }
+    *outInt = static_cast<int>(intValue);
+    return true;
+}
+static bool parse_option_bool(const SkString& value, bool* outBool) {
+    if (value.equals("true")) {
+        *outBool = true;
+        return true;
+    }
+    if (value.equals("false")) {
+        *outBool = false;
+        return true;
+    }
+    return false;
+}
+static bool parse_option_gpu_api(const SkString& value,
+                                 SkCommandLineConfigGpu::ContextType* outContextType) {
+    if (value.equals("native")) {
+        *outContextType = GrContextFactory::kNative_GLContextType;
+        return true;
+    }
+    if (value.equals("gl")) {
+        *outContextType = GrContextFactory::kGL_GLContextType;
+        return true;
+    }
+    if (value.equals("gles")) {
+        *outContextType = GrContextFactory::kGLES_GLContextType;
+        return true;
+    }
+    if (value.equals("debug")) {
+        *outContextType = GrContextFactory::kDebug_GLContextType;
+        return true;
+    }
+    if (value.equals("null")) {
+        *outContextType = GrContextFactory::kNull_GLContextType;
+        return true;
+    }
+#if SK_ANGLE
+#ifdef SK_BUILD_FOR_WIN
+    if (value.equals("angle")) {
+        *outContextType = GrContextFactory::kANGLE_GLContextType;
+        return true;
+    }
+#endif
+    if (value.equals("angle-gl")) {
+        *outContextType = GrContextFactory::kANGLE_GL_GLContextType;
+        return true;
+    }
+#endif
+#if SK_COMMAND_BUFFER
+    if (value.equals("commandbuffer")) {
+        *outContextType = GrContextFactory::kCommandBuffer_GLContextType;
+        return true;
+    }
+#endif
+#if SK_MESA
+    if (value.equals("mesa")) {
+        *outContextType = GrContextFactory::kMESA_GLContextType;
+        return true;
+    }
+#endif
+    return false;
+}
+
+SkCommandLineConfigGpu* parse_command_line_config_gpu(const SkString& tag,
+                                                      const SkTArray<SkString>& vias,
+                                                      const SkString& options) {
+    // Defaults for GPU backend.
+    bool seenAPI = false;
+    SkCommandLineConfigGpu::ContextType contextType = GrContextFactory::kNative_GLContextType;
+    bool seenUseNVPR = false;
+    bool useNVPR = false;
+    bool seenUseDIText =false;
+    bool useDIText = false;
+    bool seenSamples = false;
+    int samples = 0;
+
+    SkTArray<SkString> optionParts;
+    SkStrSplit(options.c_str(), ",", kStrict_SkStrSplitMode, &optionParts);
+    for (int i = 0; i < optionParts.count(); ++i) {
+        SkTArray<SkString> keyValueParts;
+        SkStrSplit(optionParts[i].c_str(), "=", kStrict_SkStrSplitMode, &keyValueParts);
+        if (keyValueParts.count() != 2) {
+            return nullptr;
+        }
+        const SkString& key = keyValueParts[0];
+        const SkString& value = keyValueParts[1];
+        bool valueOk = false;
+        if (key.equals("api") && !seenAPI) {
+            valueOk = parse_option_gpu_api(value, &contextType);
+            seenAPI = true;
+        } else if (key.equals("nvpr") && !seenUseNVPR) {
+            valueOk = parse_option_bool(value, &useNVPR);
+            seenUseNVPR = true;
+        } else if (key.equals("dit") && !seenUseDIText) {
+            valueOk = parse_option_bool(value, &useDIText);
+            seenUseDIText = true;
+        } else if (key.equals("samples") && !seenSamples) {
+            valueOk = parse_option_int(value, &samples);
+            seenSamples = true;
+        }
+        if (!valueOk) {
+            return nullptr;
+        }
+    }
+    return new SkCommandLineConfigGpu(tag, vias, contextType, useNVPR, useDIText, samples);
+}
+#endif
+
+void ParseConfigs(const SkCommandLineFlags::StringArray& configs,
+                  SkCommandLineConfigArray* outResult) {
+    outResult->reset();
+    for (int i = 0; i < configs.count(); ++i) {
+        SkString extendedBackend;
+        SkString extendedOptions;
+        SkString simpleBackend;
+        SkTArray<SkString> vias;
+
+        SkString tag(configs[i]);
+        SkTArray<SkString> parts;
+        SkStrSplit(tag.c_str(), "(", kStrict_SkStrSplitMode, &parts);
+        if (parts.count() == 2) {
+            SkTArray<SkString> parts2;
+            SkStrSplit(parts[1].c_str(), ")", kStrict_SkStrSplitMode, &parts2);
+            if (parts2.count() == 2 && parts2[1].isEmpty()) {
+                SkStrSplit(parts[0].c_str(), "-", kStrict_SkStrSplitMode, &vias);
+                if (vias.count()) {
+                    extendedBackend = vias[vias.count() - 1];
+                    vias.pop_back();
+                } else {
+                    extendedBackend = parts[0];
+                }
+                extendedOptions = parts2[0];
+                simpleBackend.printf("%s(%s)", extendedBackend.c_str(), extendedOptions.c_str());
+            }
+        }
+
+        if (extendedBackend.isEmpty()) {
+            simpleBackend = tag;
+            SkStrSplit(tag.c_str(), "-", kStrict_SkStrSplitMode, &vias);
+            if (vias.count()) {
+                simpleBackend = vias[vias.count() - 1];
+                vias.pop_back();
+            }
+            // Note: no #if SK_ANGLE: this is a special rule in the via-tag grammar.
+            if (vias.count() && simpleBackend.equals("gl") &&
+                vias[vias.count() - 1].equals("angle")) {
+                simpleBackend = "angle-gl";
+                vias.pop_back();
+            }
+
+            for (auto& predefinedConfig : gPredefinedConfigs) {
+                if (simpleBackend.equals(predefinedConfig.predefinedConfig)) {
+                    extendedBackend = predefinedConfig.backend;
+                    extendedOptions = predefinedConfig.options;
+                    break;
+                }
+            }
+        }
+        SkCommandLineConfig* parsedConfig = nullptr;
+#if SK_SUPPORT_GPU
+        if (extendedBackend.equals("gpu")) {
+            parsedConfig = parse_command_line_config_gpu(tag, vias, extendedOptions);
+        }
+#endif
+        if (!parsedConfig) {
+            parsedConfig = new SkCommandLineConfig(tag, simpleBackend, vias);
+        }
+        outResult->emplace_back(parsedConfig);
+    }
+}