create simple 'skpmaker' tool to generate SKP files for testing

(needed to create self-test for render_pictures)

BUG=skia:1943
R=rmistry@google.com, mtklein@google.com

Author: epoger@google.com

Review URL: https://codereview.chromium.org/108343006

git-svn-id: http://skia.googlecode.com/svn/trunk@12864 2bbb7eff-a529-9590-31e7-b0007b416f81

gyp/tools.gyp

@@ -13,17 +13,18 @@
       'target_name': 'tools',
       'type': 'none',
       'dependencies': [
+        'bbh_shootout',
         'bench_pictures',
         'filter',
-        'lua_pictures',
-        'bbh_shootout',
         'lua_app',
+        'lua_pictures',
         'pinspect',
         'render_pdfs',
         'render_pictures',
         'skdiff',
-        'skpdiff',
         'skhello',
+        'skpdiff',
+        'skpmaker',
         'skimage',
         'test_image_decoder',
       ],
@@ -109,6 +110,20 @@
         }],
       ],
     },
+    {
+      'target_name': 'skpmaker',
+      'type': 'executable',
+      'sources': [
+        '../tools/skpmaker.cpp',
+      ],
+      'include_dirs': [
+        '../src/core',
+      ],
+      'dependencies': [
+        'flags.gyp:flags',
+        'skia_lib.gyp:skia_lib',
+      ],
+    },
     {
       'target_name': 'skimagediff',
       'type': 'executable',

tools/skpmaker.cpp

@@ -0,0 +1,79 @@
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ * Simple tool to generate SKP files for testing.
+ */
+
+#include "SkCanvas.h"
+#include "SkColor.h"
+#include "SkCommandLineFlags.h"
+#include "SkPaint.h"
+#include "SkPicture.h"
+#include "SkScalar.h"
+#include "SkStream.h"
+
+// Flags used by this file, alphabetically:
+DEFINE_int32(blue, 128, "Value of blue color channel in image, 0-255.");
+DEFINE_int32(green, 128, "Value of green color channel in image, 0-255.");
+DEFINE_int32(height, 200, "Height of canvas to create.");
+DEFINE_int32(red, 128, "Value of red color channel in image, 0-255.");
+DEFINE_int32(width, 300, "Width of canvas to create.");
+DEFINE_string(writePath, "", "Filepath to write the SKP into.");
+
+static void skpmaker(SkScalar width, SkScalar height, SkColor color,
+                     const char *writePath) {
+    SkPicture pict;
+    SkCanvas* canvas = pict.beginRecording(width, height);
+    SkPaint paint;
+    paint.setStyle(SkPaint::kFill_Style);
+    paint.setColor(color);
+    canvas->drawRectCoords(0, 0, width, height, paint);
+    pict.endRecording();
+    SkFILEWStream stream(writePath);
+    pict.serialize(&stream);
+}
+
+int tool_main(int argc, char** argv);
+int tool_main(int argc, char** argv) {
+    SkCommandLineFlags::SetUsage("Creates a simple .skp file for testing.");
+    SkCommandLineFlags::Parse(argc, argv);
+
+    // Validate flags.
+    if ((FLAGS_blue < 0) || (FLAGS_blue > 255)) {
+        SkDebugf("--blue must be within range [0,255]\n");
+        exit(-1);
+    }
+    if ((FLAGS_green < 0) || (FLAGS_green > 255)) {
+        SkDebugf("--green must be within range [0,255]\n");
+        exit(-1);
+    }
+    if (FLAGS_height <= 0) {
+        SkDebugf("--height must be >0\n");
+        exit(-1);
+    }
+    if ((FLAGS_red < 0) || (FLAGS_red > 255)) {
+        SkDebugf("--red must be within range [0,255]\n");
+        exit(-1);
+    }
+    if (FLAGS_width <= 0) {
+        SkDebugf("--width must be >0\n");
+        exit(-1);
+    }
+    if (FLAGS_writePath.isEmpty()) {
+        SkDebugf("--writePath must be nonempty\n");
+        exit(-1);
+    }
+
+    SkColor color = SkColorSetRGB(FLAGS_red, FLAGS_green, FLAGS_blue);
+    skpmaker(SkIntToScalar(FLAGS_width), SkIntToScalar(FLAGS_height), color, FLAGS_writePath[0]);
+    return 0;
+}
+
+#if !defined SK_BUILD_FOR_IOS
+int main(int argc, char * const argv[]) {
+    return tool_main(argc, (char**) argv);
+}
+#endif