DM testing for skipping and scaling

dm/DM.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "CrashHandler.h"
 #include "DMJsonWriter.h"
 #include "DMSrcSink.h"
@@ skipping 187 matching lines @@
     if (!encoded) {
         SkDebugf("Couldn't read %s.", path.c_str());
         return;
     }
     SkAutoTDelete<SkCodec> codec(SkCodec::NewFromData(encoded));
     if (NULL == codec.get()) {
         SkDebugf("Couldn't create codec for %s.", path.c_str());
         return;
     }
 
-    // Build additional test cases for images that decode natively to non-canvas types
-    switch(codec->getInfo().colorType()) {
-        case kGray_8_SkColorType:
-            push_src("image", "codec_kGray8", new CodecSrc(path, CodecSrc::kNormal_Mode,
-                    CodecSrc::kGrayscale_Always_DstColorType));
-            push_src("image", "scanline_kGray8", new CodecSrc(path, CodecSrc::kScanline_Mode,
-                    CodecSrc::kGrayscale_Always_DstColorType));
-            push_src("image", "scanline_subset_kGray8", new CodecSrc(path,
-                    CodecSrc::kScanline_Subset_Mode, CodecSrc::kGrayscale_Always_DstColorType));
-            // Intentional fall through
-            // FIXME: Is this a long term solution for testing wbmps decodes to kIndex8?
-            // Further discussion on this topic is at skbug.com/3683
-        case kIndex_8_SkColorType:
-            push_src("image", "codec_kIndex8", new CodecSrc(path, CodecSrc::kNormal_Mode,
-                    CodecSrc::kIndex8_Always_DstColorType));
-            push_src("image", "scanline_kIndex8", new CodecSrc(path, CodecSrc::kScanline_Mode,
-                    CodecSrc::kIndex8_Always_DstColorType));
-            push_src("image", "scanline_subset_kIndex8", new CodecSrc(path,
-                    CodecSrc::kScanline_Subset_Mode, CodecSrc::kIndex8_Always_DstColorType));
-            break;
-        default:
-            // Do nothing
-            break;
+    // Choose scales for scaling tests.
+    // TODO (msarett): Add more scaling tests as we implement more flexible scaling.
+    // TODO (msarett): Implement scaling tests for SkImageDecoder in order to compare with these
+    //                 tests.  SkImageDecoder supports downscales by integer factors.
+    const float scales[] = { 0.125f, 0.25f, 0.5f, 1.0f };
+
+    for (float scale : scales) {
+        // Build additional test cases for images that decode natively to non-canvas types
+        switch(codec->getInfo().colorType()) {
+            case kGray_8_SkColorType:
+                push_src("image", "codec_kGray8", new CodecSrc(path, CodecSrc::kNormal_Mode,
+                        CodecSrc::kGrayscale_Always_DstColorType, scale));
+                push_src("image", "scanline_kGray8", new CodecSrc(path, CodecSrc::kScanline_Mode,
+                        CodecSrc::kGrayscale_Always_DstColorType, scale));
+                push_src("image", "scanline_subset_kGray8", new CodecSrc(path,
+                        CodecSrc::kScanline_Subset_Mode, CodecSrc::kGrayscale_Always_DstColorType,
+                        scale));
+                push_src("image", "stripe_kGray8", new CodecSrc(path, CodecSrc::kStripe_Mode,
+                        CodecSrc::kGrayscale_Always_DstColorType, scale));
+                // Intentional fall through
+                // FIXME: Is this a long term solution for testing wbmps decodes to kIndex8?
+                // Further discussion on this topic is at skbug.com/3683
+            case kIndex_8_SkColorType:
+                push_src("image", "codec_kIndex8", new CodecSrc(path, CodecSrc::kNormal_Mode,
+                        CodecSrc::kIndex8_Always_DstColorType, scale));
+                push_src("image", "scanline_kIndex8", new CodecSrc(path, CodecSrc::kScanline_Mode,
+                        CodecSrc::kIndex8_Always_DstColorType, scale));
+                push_src("image", "scanline_subset_kIndex8", new CodecSrc(path,
+                        CodecSrc::kScanline_Subset_Mode, CodecSrc::kIndex8_Always_DstColorType,
+                        scale));
+                push_src("image", "stripe_kIndex8", new CodecSrc(path, CodecSrc::kStripe_Mode,
+                        CodecSrc::kIndex8_Always_DstColorType, scale));
+                break;
+            default:
+                // Do nothing
+                break;
+        }
+
+        // Decode all images to the canvas color type
+        push_src("image", "codec", new CodecSrc(path, CodecSrc::kNormal_Mode,
+                CodecSrc::kGetFromCanvas_DstColorType, scale));
+        push_src("image", "scanline", new CodecSrc(path, CodecSrc::kScanline_Mode,
+                CodecSrc::kGetFromCanvas_DstColorType, scale));
+        push_src("image", "scanline_subset", new CodecSrc(path, CodecSrc::kScanline_Subset_Mode,
+                CodecSrc::kGetFromCanvas_DstColorType, scale));
+        push_src("image", "stripe", new CodecSrc(path, CodecSrc::kStripe_Mode,
+                CodecSrc::kGetFromCanvas_DstColorType, scale));
     }
-
-    // Decode all images to the canvas color type
-    push_src("image", "codec", new CodecSrc(path, CodecSrc::kNormal_Mode,
-            CodecSrc::kGetFromCanvas_DstColorType));
-    push_src("image", "scanline", new CodecSrc(path, CodecSrc::kScanline_Mode,
-            CodecSrc::kGetFromCanvas_DstColorType));
-    push_src("image", "scanline_subset", new CodecSrc(path, CodecSrc::kScanline_Subset_Mode,
-            CodecSrc::kGetFromCanvas_DstColorType));
 }
 
 static bool codec_supported(const char* ext) {
     // FIXME: Once other versions of SkCodec are available, we can add them to this
     // list (and eventually we can remove this check once they are all supported).
     static const char* const exts[] = {
         "bmp", "gif", "jpg", "jpeg", "png", "ico", "wbmp",
         "BMP", "GIF", "JPG", "JPEG", "PNG", "ICO", "WBMP"
     };
 
@@ skipping 540 matching lines @@
     }
     return 0;
 }
 
 #if !defined(SK_BUILD_FOR_IOS)
 int main(int argc, char** argv) {
     SkCommandLineFlags::Parse(argc, argv);
     return dm_main();
 }
 #endif