cc/output/shader_unittest.cc

// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "cc/output/shader.h"

#include "cc/debug/fake_web_graphics_context_3d.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/gfx/point.h"
#include "ui/gfx/size.h"

namespace cc {

TEST(ShaderTest, HighpThresholds) {
  // The FakeWebGraphicsContext3D always uses a mediump precision of 10 bits
  // which corresponds to a native highp threshold of 2^10 = 1024
  FakeWebGraphicsContext3D context;

  int threshold_cache = 0;
  int threshold_min;
  gfx::Point closePoint(512, 512);
  gfx::Size smallSize(512, 512);
  gfx::Point farPoint(2560, 2560);
  gfx::Size bigSize(2560, 2560);

  threshold_min = 0;
  EXPECT_EQ(TexCoordPrecisionMedium, TexCoordPrecisionRequired(
      &context, &threshold_cache, threshold_min, closePoint));
  EXPECT_EQ(TexCoordPrecisionMedium, TexCoordPrecisionRequired(
      &context, &threshold_cache, threshold_min, smallSize));
  EXPECT_EQ(TexCoordPrecisionHigh, TexCoordPrecisionRequired(
      &context, &threshold_cache, threshold_min, farPoint));
  EXPECT_EQ(TexCoordPrecisionHigh, TexCoordPrecisionRequired(
      &context, &threshold_cache, threshold_min, bigSize));

  threshold_min = 3000;
  EXPECT_EQ(TexCoordPrecisionMedium, TexCoordPrecisionRequired(
      &context, &threshold_cache, threshold_min, closePoint));
  EXPECT_EQ(TexCoordPrecisionMedium, TexCoordPrecisionRequired(
      &context, &threshold_cache, threshold_min, smallSize));
  EXPECT_EQ(TexCoordPrecisionMedium, TexCoordPrecisionRequired(
      &context, &threshold_cache, threshold_min, farPoint));
  EXPECT_EQ(TexCoordPrecisionMedium, TexCoordPrecisionRequired(
      &context, &threshold_cache, threshold_min, bigSize));
}

}  // namespace cc