Add timer and frame counter to SimpleTexture2D.

Can be useful for perf testing. Bug: angleproject:4729 Change-Id: I26c5fd53a34f4ed21d565e020b7c2058ff7ee6db Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2241621Reviewed-by: Jonah Ryan-Davis <jonahr@google.com> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>

Add timer and frame counter to SimpleTexture2D.
e95e2c3c · Jamie Madill · Commit Bot · 46594c96 · e95e2c3c
Commit e95e2c3c authored Jun 11, 2020 by Jamie Madill Committed by Commit Bot Jun 15, 2020
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SimpleTexture2D.cpp samples/simple_texture_2d/SimpleTexture2D.cpp +13 -0

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--- a/samples/simple_texture_2d/SimpleTexture2D.cpp
+++ b/samples/simple_texture_2d/SimpleTexture2D.cpp
@@ -61,6 +61,8 @@ void main()

        glClearColor(0.0f, 0.0f, 0.0f, 0.0f);

+        mTimer.start();
+
        return true;
    }

@@ -110,6 +112,14 @@ void main()
        glUniform1i(mSamplerLoc, 0);

        glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);
+
+        mDrawCount++;
+
+        if (mDrawCount % 100 == 0)
+        {
+            printf("Rate: %0.2lf iterations / second\n",
+                   static_cast<double>(mDrawCount) / mTimer.getElapsedTime());
+        }
    }

  private:
@@ -125,6 +135,9 @@ void main()

    // Texture handle
    GLuint mTexture;
+
+    Timer mTimer;
+    uint32_t mDrawCount = 0;
 };

 int main(int argc, char **argv)