This CL adds client.toDataURL which gets the contents

of the client area as a data url (which is a base64
encoded string of a png file)

data urls are part of the HTML5 standard and supported
by firefox, safari and chrome.
http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-canvas-todataurl

That means you can now do this

var dataURL = client.toDataURL();
// make an IMG tag display the screenshot
someImgTag.src = dataURL;  
// use the IMG tag to draw into a canvas
someCanvasContext.drawImage(someImageTag, ...);

It also means there is no need for the test builds
anymore "test-dbg-d3d", "test-opt-d3d" etc as
toDataURL is part of the public API and can
therefore always be used to take screenshots
in any build.

I updated the selenium code to use it.

There are a few issues:

1) The GL version has the same limitations as taking
a screenshot before. Namely that the client area
must be on screen. We need to fix this.

2) We need to add support for origin-clean. See
https://tracker.corp.google.com/story/show/180334

Review URL: http://codereview.chromium.org/164130

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@22869 0039d316-1c4b-4281-b951-d872f2087c98

8 files changed, 380 insertions, 0 deletions

diff --git a/o3d/utils/build.scons b/o3d/utils/build.scons
index f06781e..0255261 100644
--- a/o3d/utils/build.scons
+++ b/o3d/utils/build.scons
@@ -31,6 +31,8 @@
 Import('env')
 
 inputs = [
+    'cross/base64.cc',
+    'cross/dataurl.cc',
     'cross/file_path_utils.cc',
     'cross/file_text_reader.cc',
     'cross/file_text_writer.cc',
diff --git a/o3d/utils/cross/base64.cc b/o3d/utils/cross/base64.cc
new file mode 100644
index 0000000..3662258
--- /dev/null
+++ b/o3d/utils/cross/base64.cc
@@ -0,0 +1,90 @@
+/*

+ * Copyright 2009, Google Inc.

+ * All rights reserved.

+ *

+ * Redistribution and use in source and binary forms, with or without

+ * modification, are permitted provided that the following conditions are

+ * met:

+ *

+ *     * Redistributions of source code must retain the above copyright

+ * notice, this list of conditions and the following disclaimer.

+ *     * Redistributions in binary form must reproduce the above

+ * copyright notice, this list of conditions and the following disclaimer

+ * in the documentation and/or other materials provided with the

+ * distribution.

+ *     * Neither the name of Google Inc. nor the names of its

+ * contributors may be used to endorse or promote products derived from

+ * this software without specific prior written permission.

+ *

+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

+ */

+

+// This file contains the declaration of functions for dealing with base64

+// encoding and decoding

+

+#include "utils/cross/base64.h"

+#include "core/cross/types.h"

+

+namespace o3d {

+namespace base64 {

+

+size_t GetEncodeLength(size_t length) {

+  return (length + 2) / 3 * 4;

+}

+

+void Encode(const void* src_ptr, size_t length, void* dst_ptr) {

+  const int kEncodePad = 64;

+

+  static const char kEncode[] =

+      "ABCDEFGHIJKLMNOPQRSTUVWXYZ"

+      "abcdefghijklmnopqrstuvwxyz"

+      "0123456789+/=";

+

+  const uint8* src = reinterpret_cast<const uint8*>(src_ptr);

+  uint8* dst = reinterpret_cast<uint8*>(dst_ptr);

+  if (dst) {

+    size_t remainder = length % 3;

+    const uint8* end = &src[length - remainder];

+    while (src < end) {

+      unsigned a = *src++;

+      unsigned b = *src++;

+      unsigned c = *src++;

+      unsigned d = c & 0x3F;

+      c = (c >> 6 | b << 2) & 0x3F;

+      b = (b >> 4 | a << 4) & 0x3F;

+      a = a >> 2;

+      *dst++ = kEncode[a];

+      *dst++ = kEncode[b];

+      *dst++ = kEncode[c];

+      *dst++ = kEncode[d];

+    }

+    if (remainder > 0) {

+      unsigned k1 = 0;

+      unsigned k2 = kEncodePad;

+      unsigned a =  *src++;

+      if (remainder == 2) {

+        int b = *src++;

+        k1 = b >> 4;

+        k2 = (b << 2) & 0x3F;

+      }

+      *dst++ = kEncode[a >> 2];

+      *dst++ = kEncode[(k1 | a << 4) & 0x3F];

+      *dst++ = kEncode[k2];

+      *dst++ = kEncode[kEncodePad];

+    }

+  }

+}

+

+}  // namespace base64

+}  // namespace o3d

+

diff --git a/o3d/utils/cross/base64.h b/o3d/utils/cross/base64.h
new file mode 100644
index 0000000..881f988
--- /dev/null
+++ b/o3d/utils/cross/base64.h
@@ -0,0 +1,56 @@
+/*

+ * Copyright 2009, Google Inc.

+ * All rights reserved.

+ *

+ * Redistribution and use in source and binary forms, with or without

+ * modification, are permitted provided that the following conditions are

+ * met:

+ *

+ *     * Redistributions of source code must retain the above copyright

+ * notice, this list of conditions and the following disclaimer.

+ *     * Redistributions in binary form must reproduce the above

+ * copyright notice, this list of conditions and the following disclaimer

+ * in the documentation and/or other materials provided with the

+ * distribution.

+ *     * Neither the name of Google Inc. nor the names of its

+ * contributors may be used to endorse or promote products derived from

+ * this software without specific prior written permission.

+ *

+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

+ */

+

+// This file contains the declaration of functions for dealing with base64

+// encoding and decoding

+

+#ifndef O3D_UTILS_CROSS_BASE64_H_

+#define O3D_UTILS_CROSS_BASE64_H_

+

+namespace o3d {

+namespace base64 {

+

+// Returns the number of bytes needed to encode length bytes in base64.

+size_t GetEncodeLength(size_t length);

+

+// Encodes the src into base64 into the dst. The dst must have enough

+// space to hold the result.

+// Parameters:

+//   src: pointer to source data.

+//   length: the length of the source data

+//   dst: pointer to place to store result.

+void Encode(const void* src, size_t length, void* dst);

+

+}  // namespace base64

+}  // namespace o3d

+

+#endif  // O3D_UTILS_CROSS_BASE64_H_

+

diff --git a/o3d/utils/cross/base64_test.cc b/o3d/utils/cross/base64_test.cc
new file mode 100644
index 0000000..205ce7b
--- /dev/null
+++ b/o3d/utils/cross/base64_test.cc
@@ -0,0 +1,65 @@
+/*

+ * Copyright 2009, Google Inc.

+ * All rights reserved.

+ *

+ * Redistribution and use in source and binary forms, with or without

+ * modification, are permitted provided that the following conditions are

+ * met:

+ *

+ *     * Redistributions of source code must retain the above copyright

+ * notice, this list of conditions and the following disclaimer.

+ *     * Redistributions in binary form must reproduce the above

+ * copyright notice, this list of conditions and the following disclaimer

+ * in the documentation and/or other materials provided with the

+ * distribution.

+ *     * Neither the name of Google Inc. nor the names of its

+ * contributors may be used to endorse or promote products derived from

+ * this software without specific prior written permission.

+ *

+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

+ */

+

+

+// This file contains the tests of base64 functions

+

+#include "tests/common/win/testing_common.h"

+#include "utils/cross/base64.h"

+

+namespace o3d {

+

+class Base64Test : public testing::Test {

+};

+

+TEST_F(Base64Test, GetEncodeLength) {

+  EXPECT_EQ(0, base64::GetEncodeLength(0));

+  EXPECT_EQ(4, base64::GetEncodeLength(1));

+  EXPECT_EQ(4, base64::GetEncodeLength(2));

+  EXPECT_EQ(4, base64::GetEncodeLength(3));

+  EXPECT_EQ(8, base64::GetEncodeLength(4));

+}

+

+TEST_F(Base64Test, Encode) {

+  unsigned char buffer[100];

+  memset(buffer, 0xFF, sizeof(buffer));

+  base64::Encode("abc", 3, buffer);

+  EXPECT_EQ(0, memcmp(buffer, "YWJj", 4));

+  EXPECT_EQ(0xFF, buffer[4]);

+  memset(buffer, 0xFF, sizeof(buffer));

+  base64::Encode("ab\0c", 4, buffer);

+  EXPECT_EQ(0, memcmp(buffer, "YWIAYw==", 8));

+  EXPECT_EQ(0xFF, buffer[8]);

+}

+

+}  // namespace o3d

+

+

diff --git a/o3d/utils/cross/dataurl.cc b/o3d/utils/cross/dataurl.cc
new file mode 100644
index 0000000..8334b8d
--- /dev/null
+++ b/o3d/utils/cross/dataurl.cc
@@ -0,0 +1,53 @@
+/*

+ * Copyright 2009, Google Inc.

+ * All rights reserved.

+ *

+ * Redistribution and use in source and binary forms, with or without

+ * modification, are permitted provided that the following conditions are

+ * met:

+ *

+ *     * Redistributions of source code must retain the above copyright

+ * notice, this list of conditions and the following disclaimer.

+ *     * Redistributions in binary form must reproduce the above

+ * copyright notice, this list of conditions and the following disclaimer

+ * in the documentation and/or other materials provided with the

+ * distribution.

+ *     * Neither the name of Google Inc. nor the names of its

+ * contributors may be used to endorse or promote products derived from

+ * this software without specific prior written permission.

+ *

+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

+ */

+

+// This file contains the definition of functions for dealing with data urls.

+

+#include "utils/cross/dataurl.h"

+#include "core/cross/types.h"

+#include "utils/cross/base64.h"

+

+namespace o3d {

+namespace dataurl {

+

+const char* const kEmptyDataURL = "data:,";

+

+String ToDataURL(const String& mime_type, const void* data, size_t length) {

+  String header(String("data:") + mime_type + ";base64,");

+  String result(header.size() + base64::GetEncodeLength(length), ' ');

+  result.replace(0, header.size(), header);

+  base64::Encode(data, length, &result[header.size()]);

+  return result;

+}

+

+}  // namespace dataurl

+}  // namespace o3d

+

diff --git a/o3d/utils/cross/dataurl.h b/o3d/utils/cross/dataurl.h
new file mode 100644
index 0000000..cc46e01
--- /dev/null
+++ b/o3d/utils/cross/dataurl.h
@@ -0,0 +1,52 @@
+/*

+ * Copyright 2009, Google Inc.

+ * All rights reserved.

+ *

+ * Redistribution and use in source and binary forms, with or without

+ * modification, are permitted provided that the following conditions are

+ * met:

+ *

+ *     * Redistributions of source code must retain the above copyright

+ * notice, this list of conditions and the following disclaimer.

+ *     * Redistributions in binary form must reproduce the above

+ * copyright notice, this list of conditions and the following disclaimer

+ * in the documentation and/or other materials provided with the

+ * distribution.

+ *     * Neither the name of Google Inc. nor the names of its

+ * contributors may be used to endorse or promote products derived from

+ * this software without specific prior written permission.

+ *

+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

+ */

+

+// This file contains the declaration of functions for dealing with data urls.

+

+#ifndef O3D_UTILS_CROSS_DATAURL_H_

+#define O3D_UTILS_CROSS_DATAURL_H_

+

+#include "core/cross/types.h"

+

+namespace o3d {

+namespace dataurl {

+

+// An empty data URL. ("data:,")

+extern const char* const kEmptyDataURL;

+

+// Creates a data URL for the given data.

+String ToDataURL(const String& mime_type, const void* data, size_t length);

+

+}  // namespace dataurl

+}  // namespace o3d

+

+#endif  // O3D_UTILS_CROSS_DATAURL_H_

+

diff --git a/o3d/utils/cross/dataurl_test.cc b/o3d/utils/cross/dataurl_test.cc
new file mode 100644
index 0000000..8404650
--- /dev/null
+++ b/o3d/utils/cross/dataurl_test.cc
@@ -0,0 +1,56 @@
+/*

+ * Copyright 2009, Google Inc.

+ * All rights reserved.

+ *

+ * Redistribution and use in source and binary forms, with or without

+ * modification, are permitted provided that the following conditions are

+ * met:

+ *

+ *     * Redistributions of source code must retain the above copyright

+ * notice, this list of conditions and the following disclaimer.

+ *     * Redistributions in binary form must reproduce the above

+ * copyright notice, this list of conditions and the following disclaimer

+ * in the documentation and/or other materials provided with the

+ * distribution.

+ *     * Neither the name of Google Inc. nor the names of its

+ * contributors may be used to endorse or promote products derived from

+ * this software without specific prior written permission.

+ *

+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

+ */

+

+

+// This file contains the tests of dataurl functions

+

+#include "tests/common/win/testing_common.h"

+#include "utils/cross/dataurl.h"

+

+namespace o3d {

+

+class DataURLTest : public testing::Test {

+};

+

+TEST_F(DataURLTest, kEmptyDataURL) {

+  EXPECT_STREQ("data:,", dataurl::kEmptyDataURL);

+}

+

+TEST_F(DataURLTest, ToDataURL) {

+  EXPECT_STREQ("data:a/b;base64,YWJj",

+               dataurl::ToDataURL("a/b", "abc", 3).c_str());

+  EXPECT_STREQ("data:de/ej;base64,YWIAYw==",

+               dataurl::ToDataURL("de/ej", "ab\0c", 4).c_str());

+}

+

+}  // namespace o3d

+

+

diff --git a/o3d/utils/utils.gyp b/o3d/utils/utils.gyp
index 9fb5e45..14e3fa6 100644
--- a/o3d/utils/utils.gyp
+++ b/o3d/utils/utils.gyp
@@ -21,6 +21,10 @@
       'target_name': 'o3dUtils',
       'type': 'static_library',
       'sources': [
+        "cross/base64.cc",
+        "cross/base64.h",
+        "cross/dataurl.cc",
+        "cross/dataurl.h",
         "cross/file_path_utils.cc",
         "cross/file_path_utils.h",
         "cross/file_text_reader.cc",
@@ -50,6 +54,8 @@
       ],
       'direct_dependent_settings': {
         'sources': [
+          "cross/base64_test.cc",
+          "cross/dataurl_test.cc",
           "cross/file_path_utils_test.cc",
           "cross/file_text_reader_test.cc",
           "cross/json_writer_test.cc",