Add RAW decoding support to Skia

dm/DM.cpp

Index: dm/DM.cpp
diff --git a/dm/DM.cpp b/dm/DM.cpp
index 25a12637887c8ecfc403c93ec1dac66948f321f9..d37b7b1d61aa3b4619bf2944646d59da59da0d03 100644
--- a/dm/DM.cpp
+++ b/dm/DM.cpp
@@ -503,6 +503,20 @@ static bool brd_supported(const char* ext) {
     return false;
 }
 
+static bool is_raw(const SkString& file) {
+    static const char* const exts[] = {
+        "arw", "cr2", "dng", "nef", "nrw", "orf", "raf", "rw2", "pef", "srw",
+        "ARW", "CR2", "DNG", "NEF", "NRW", "ORF", "RAF", "RW2", "PEF", "SRW",
+    };
+
+    for (uint32_t i = 0; i < SK_ARRAY_COUNT(exts); i++) {
+        if (file.endsWith(exts[i])) {
+            return true;
+        }
+    }
+    return false;
+}
+
 static void gather_srcs() {
     for (const skiagm::GMRegistry* r = skiagm::GMRegistry::Head(); r; r = r->next()) {
         push_src("gm", "", new GMSrc(r->factory()));
@@ -521,6 +535,8 @@ static void gather_srcs() {
     static const char* const exts[] = {
         "bmp", "gif", "jpg", "jpeg", "png", "webp", "ktx", "astc", "wbmp", "ico",
         "BMP", "GIF", "JPG", "JPEG", "PNG", "WEBP", "KTX", "ASTC", "WBMP", "ICO",
+        "arw", "cr2", "dng", "nef", "nrw", "orf", "raf", "rw2", "pef", "srw",
+        "ARW", "CR2", "DNG", "NEF", "NRW", "ORF", "RAF", "RW2", "PEF", "SRW",
     };
     for (int i = 0; i < FLAGS_images.count(); i++) {
         const char* flag = FLAGS_images[i];
@@ -529,7 +545,9 @@ static void gather_srcs() {
                 SkOSFile::Iter it(flag, exts[j]);
                 for (SkString file; it.next(&file); ) {
                     SkString path = SkOSPath::Join(flag, file.c_str());
-                    push_src("image", "decode", new ImageSrc(path)); // Decode entire image
+                    if (!is_raw(file)) {
+                        push_src("image", "decode", new ImageSrc(path)); // Decode entire image
+                    }
                     push_codec_srcs(path);
                     if (brd_supported(exts[j])) {
                         push_brd_srcs(path);
@@ -538,7 +556,10 @@ static void gather_srcs() {
             }
         } else if (sk_exists(flag)) {
             // assume that FLAGS_images[i] is a valid image if it is a file.
-            push_src("image", "decode", new ImageSrc(flag)); // Decode entire image.
+            SkString file(flag);
+            if (!is_raw(file)) {
+                push_src("image", "decode", new ImageSrc(flag)); // Decode entire image.
+            }
             push_codec_srcs(flag);
             push_brd_srcs(flag);
         }