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

Add extended config specification form that can be used to run different
gpu backend with different APIs.

The configs can be specified with the form:
gpu(api=string,dit=bool,nvpr=bool,samples=int)

This replaces and removes the --gpuAPI flag.

All existing configs should still work.

Adds following documentation:

out/Debug/dm --help config

Flags:
    --config:	type: string	default: 565 8888 gpu nonrendering
        Options: 565 8888 debug gpu gpudebug gpudft gpunull msaa16 msaa4
        nonrendering null nullgpu nvprmsaa16 nvprmsaa4 pdf pdf_poppler skp svg
        xps or use extended form 'backend(option=value,...)'.

        Extended form: 'backend(option=value,...)'

        Possible backends and options:

        gpu(api=string,dit=bool,nvpr=bool,samples=int)	GPU backend
        	api	type: string	default: native.
        	    Select graphics API to use with gpu backend.
        	    Options:
        		native			Use platform default OpenGL or OpenGL ES backend.
        		gl    			Use OpenGL.
        		gles  			Use OpenGL ES.
        		debug 			Use debug OpenGL.
        		null  			Use null OpenGL.
        	dit	type: bool	default: false.
        	    Use device independent text.
        	nvpr	type: bool	default: false.
        	    Use NV_path_rendering OpenGL and OpenGL ES extension.
        	samples	type: int	default: 0.
        	    Use multisampling with N samples.

        Predefined configs:

        	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)

BUG=skia:2992

Committed: https://skia.googlesource.com/skia/+/e13ca329fca4c28cf4e078561f591ab27b743d23
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1490113005

Committed: https://skia.googlesource.com/skia/+/c8b4336444e7b90382e04e33665fb3b8490b825b

Committed: https://skia.googlesource.com/skia/+/9ebc3f0ee6db215dde461dc4777d85988cf272dd

Review URL: https://codereview.chromium.org/1490113005

1 files changed, 336 insertions, 0 deletions

diff --git a/tools/flags/SkCommonFlagsConfig.cpp b/tools/flags/SkCommonFlagsConfig.cpp
new file mode 100644
index 0000000000..e9e2d754a6
--- /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);
+    }
+}