1 files changed, 71 insertions, 0 deletions
diff --git a/tools/skqp/gm_knowledge.h b/tools/skqp/gm_knowledge.h
new file mode 100644
index 0000000000..4aca00ec30
--- /dev/null
+++ b/tools/skqp/gm_knowledge.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright 2017 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#ifndef gm_knowledge_DEFINED
+#define gm_knowledge_DEFINED
+
+#include <cstdint>
+
+namespace skqp {
+class AssetManager;
+}
+
+namespace gmkb {
+
+enum class Error {
+    kNone,     /**< No error. */
+    kBadInput, /**< Error with the given image data. */
+    kBadData,  /**< Error with the given gmkb data directory. */
+};
+
+/**
+Check if the given test image matches the expected results.
+
+Each pixel is an un-pre-multiplied RGBA color:
+    uint32_t make_color(uint8_t r, uint8_t g, uint8_t b, uint8_t a) {
+        return (r << 0) | (g << 8) | (b << 16) | (a << 24);
+    }
+
+The image's rowBytes is width*sizeof(uint32_t):
+    uint32_t* get_pixel_addr(uint32_t* pixels, int width, int height, int x, int y) {
+        assert(x >= 0 && x < width);
+        assert(y >= 0 && y < height);
+        return &pixels[x + (width * y)];
+    }
+
+@param pixels, width, height  the image
+@param gm_name                the name of the rendering test that produced the image
+@param backend                (optional) name of the backend
+@param asset_manager          GM KnowledgeBase data files
+@param report_directory_path  (optional) locatation to write report to.
+@param error_out              (optional) error return code.
+
+@return 0 if the test passes, otherwise a positive number representing how
+         badly it failed.  Return FLT_MAX on error.
+ */
+
+float Check(const uint32_t* pixels,
+            int width,
+            int height,
+            const char* name,
+            const char* backend,
+            skqp::AssetManager* asset_manager,
+            const char* report_directory_path,
+            Error* error_out);
+
+/**
+Check to see if the given test has expected results.
+
+@param name          The name of a rendering test.
+@param assetManager  GM KnowledgeBase data files
+
+@return true of expected results are known for the given test.
+*/
+bool IsGoodGM(const char* name, skqp::AssetManager* assetManager);
+
+}  // namespace gmkb
+
+#endif  // gm_knowledge_DEFINED