Reverting 14712.

skia/ext/image_operations_unittest.cc

 // Copyright (c) 2006-2008 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 <stdlib.h>
 
 #include "skia/ext/image_operations.h"
-#include "skia/include/SkColorPriv.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "SkBitmap.h"
 
 namespace {
 
 // Computes the average pixel value for the given range, inclusive.
 uint32_t AveragePixel(const SkBitmap& bmp,
                       int x_min, int x_max,
                       int y_min, int y_max) {
   float accum[4] = {0, 0, 0, 0};
@@ skipping 120 matching lines @@
   ASSERT_EQ(src_h, results.height());
 
   SkAutoLockPixels src_lock(src);
   SkAutoLockPixels results_lock(results);
   for (int y = 0; y < src_h; y++) {
     for (int x = 0; x < src_w; x++) {
       EXPECT_EQ(*src.getAddr32(x, y), *results.getAddr32(x, y));
     }
   }
 }
-
-// Blend two bitmaps together at 50% alpha and verify that the result
-// is the middle-blend of the two.
-TEST(ImageOperations, CreateBlendedBitmap) {
-  int src_w = 16, src_h = 16;
-  SkBitmap src_a;
-  src_a.setConfig(SkBitmap::kARGB_8888_Config, src_w, src_h);
-  src_a.allocPixels();
-
-  SkBitmap src_b;
-  src_b.setConfig(SkBitmap::kARGB_8888_Config, src_w, src_h);
-  src_b.allocPixels();
-
-  for (int y = 0, i = 0; y < src_h; y++) {
-    for (int x = 0; x < src_w; x++) {
-      *src_a.getAddr32(x, y) = SkColorSetARGB(255, 0, i * 2 % 255, i % 255);
-      *src_b.getAddr32(x, y) =
-          SkColorSetARGB((255 - i) % 255, i % 255, i * 4 % 255, 0);
-      i++;
-    }
-  }
-
-  // Shift to red.
-  SkBitmap blended = skia::ImageOperations::CreateBlendedBitmap(
-    src_a, src_b, 0.5);
-  SkAutoLockPixels srca_lock(src_a);
-  SkAutoLockPixels srcb_lock(src_b);
-  SkAutoLockPixels blended_lock(blended);
-
-  for (int y = 0; y < src_h; y++) {
-    for (int x = 0; x < src_w; x++) {
-      int i = y * src_w + x;
-      EXPECT_EQ((255 + ((255 - i) % 255)) / 2,
-                SkColorGetA(*blended.getAddr32(x, y)));
-      EXPECT_EQ(i % 255 / 2,
-                SkColorGetR(*blended.getAddr32(x, y)));
-      EXPECT_EQ(((i * 2) % 255 + (i * 4) % 255) / 2,
-                SkColorGetG(*blended.getAddr32(x, y)));
-      EXPECT_EQ(i % 255 / 2,
-                SkColorGetB(*blended.getAddr32(x, y)));
-    }
-  }
-}
-
-// Test our masking functions.
-TEST(ImageOperations, CreateMaskedBitmap) {
-  int src_w = 16, src_h = 16;
-
-  SkBitmap src;
-  FillDataToBitmap(src_w, src_h, &src);
-
-  // Generate alpha mask
-  SkBitmap alpha;
-  alpha.setConfig(SkBitmap::kARGB_8888_Config, src_w, src_h);
-  alpha.allocPixels();
-
-  unsigned char* src_data =
-      reinterpret_cast<unsigned char*>(alpha.getAddr32(0, 0));
-  for (int i = 0; i < src_w * src_h; i++) {
-    src_data[i * 4] = SkColorSetARGB(i + 128 % 255,
-                                     i + 128 % 255,
-                                     i + 64 % 255,
-                                     i + 0 % 255);
-  }
-
-  SkBitmap masked = skia::ImageOperations::CreateMaskedBitmap(src, alpha);
-
-  SkAutoLockPixels src_lock(src);
-  SkAutoLockPixels masked_lock(masked);
-  for (int y = 0; y < src_h; y++) {
-    for (int x = 0; x < src_w; x++) {
-      // Test that the alpha is equal.
-      SkColor src_pixel = *src.getAddr32(x, y);
-      SkColor alpha_pixel = *alpha.getAddr32(x, y);
-      SkColor masked_pixel = *masked.getAddr32(x, y);
-
-      // Test that the alpha is equal.
-      int alpha = (alpha_pixel & 0xff000000) >> SK_A32_SHIFT;
-      EXPECT_EQ(alpha, (masked_pixel & 0xff000000) >> SK_A32_SHIFT);
-
-      // Test that the colors are right - SkBitmaps have premultiplied alpha,
-      // so we can't just do a direct comparison.
-      EXPECT_EQ(SkColorGetR(masked_pixel),
-                SkAlphaMul(SkColorGetR(src_pixel), alpha));
-    }
-  }
-}
-
-// Testing blur without reimplementing the blur algorithm here is tough,
-// so we just check to see if the pixels have moved in the direction we
-// think they should move in (and also checking the wrapping behavior).
-// This will allow us to tweak the blur algorithm to suit speed/visual
-// needs without breaking the fundamentals.
-TEST(ImageOperations, CreateBlurredBitmap) {
-  int src_w = 4, src_h = 4;
-  SkBitmap src;
-  src.setConfig(SkBitmap::kARGB_8888_Config, src_w, src_h);
-  src.allocPixels();
-
-  for (int y = 0, i = 0; y < src_h; y++) {
-    for (int x = 0; x < src_w; x++) {
-      int r = (y == 0) ? 255 : 0;  // Make the top row red.
-      int g = (i % 2 == 0) ? 255 : 0;  // Make green alternate in each pixel.
-      int b = (y == src_h - 1) ? 255 : 0;  // Make the bottom row blue.
-
-      *src.getAddr32(x, y) = SkColorSetARGB(255, r, g, b);
-      i++;
-    }
-  }
-
-  // Perform a small blur (enough to shove the values in the direction we
-  // need - more would just be an unneccessary unit test slowdown).
-  SkBitmap blurred = skia::ImageOperations::CreateBlurredBitmap(src, 2);
-
-  SkAutoLockPixels src_lock(src);
-  SkAutoLockPixels blurred_lock(blurred);
-  for (int y = 0, i = 0; y < src_w; y++) {
-    for (int x = 0; x < src_h; x++) {
-      SkColor src_pixel = *src.getAddr32(x, y);
-      SkColor blurred_pixel = *blurred.getAddr32(x, y);
-      if (y == 0) {
-        // We expect our red to have decreased, but our blue to have
-        // increased (from the wrapping from the bottom line).
-        EXPECT_TRUE(SkColorGetR(blurred_pixel) < SkColorGetR(src_pixel));
-        EXPECT_TRUE(SkColorGetB(blurred_pixel) > SkColorGetB(src_pixel));
-      } else if (y == src_h - 1) {
-        // Now for the opposite.
-        EXPECT_TRUE(SkColorGetB(blurred_pixel) < SkColorGetB(src_pixel));
-        EXPECT_TRUE(SkColorGetR(blurred_pixel) > SkColorGetR(src_pixel));
-      }
-
-      // Expect the green channel to have moved towards the center (but
-      // not past it).
-      if (i % 2 == 0) {
-        EXPECT_LT(SkColorGetG(blurred_pixel), SkColorGetG(src_pixel));
-        EXPECT_GE(SkColorGetG(blurred_pixel), static_cast<uint32>(128));
-      } else {
-        EXPECT_GT(SkColorGetG(blurred_pixel), SkColorGetG(src_pixel));
-        EXPECT_LE(SkColorGetG(blurred_pixel), static_cast<uint32>(128));
-      }
-
-      i++;
-    }
-  }
-}
-
-// Make sure that when shifting a bitmap without any shift parameters,
-// the end result is close enough to the original (rounding errors
-// notwithstanding).
-TEST(ImageOperations, CreateHSLShiftedBitmapToSame) {
-  int src_w = 4, src_h = 4;
-  SkBitmap src;
-  src.setConfig(SkBitmap::kARGB_8888_Config, src_w, src_h);
-  src.allocPixels();
-
-  for (int y = 0, i = 0; y < src_h; y++) {
-    for (int x = 0; x < src_w; x++) {
-      *src.getAddr32(x, y) = SkColorSetARGB(i + 128 % 255,
-          i + 128 % 255, i + 64 % 255, i + 0 % 255);
-      i++;
-    }
-  }
-
-  float hsl[3] = { -1, -1, -1 };
-
-  SkBitmap shifted = skia::ImageOperations::CreateHSLShiftedBitmap(src, hsl);
-
-  SkAutoLockPixels src_lock(src);
-  SkAutoLockPixels shifted_lock(shifted);
-
-  for (int y = 0; y < src_w; y++) {
-    for (int x = 0; x < src_h; x++) {
-      SkColor src_pixel = *src.getAddr32(x, y);
-      SkColor shifted_pixel = *shifted.getAddr32(x, y);
-      EXPECT_TRUE(ColorsClose(src_pixel, shifted_pixel));
-    }
-  }
-}
-
-// Shift a blue bitmap to red.
-TEST(ImageOperations, CreateHSLShiftedBitmapHueOnly) {
-  int src_w = 16, src_h = 16;
-  SkBitmap src;
-  src.setConfig(SkBitmap::kARGB_8888_Config, src_w, src_h);
-  src.allocPixels();
-
-  for (int y = 0, i = 0; y < src_h; y++) {
-    for (int x = 0; x < src_w; x++) {
-      *src.getAddr32(x, y) = SkColorSetARGB(255, 0, 0, i % 255);
-      i++;
-    }
-  }
-
-  // Shift to red.
-  float hsl[3] = { 0, -1, -1 };
-
-  SkBitmap shifted = skia::ImageOperations::CreateHSLShiftedBitmap(src, hsl);
-
-  SkAutoLockPixels src_lock(src);
-  SkAutoLockPixels shifted_lock(shifted);
-
-  for (int y = 0, i = 0; y < src_h; y++) {
-    for (int x = 0; x < src_w; x++) {
-      EXPECT_TRUE(ColorsClose(*shifted.getAddr32(x, y),
-                              SkColorSetARGB(255, i % 255, 0, 0)));
-      i++;
-    }
-  }
-}
-
-// Test our cropping.
-TEST(ImageOperations, CreateCroppedBitmap) {
-  int src_w = 16, src_h = 16;
-  SkBitmap src;
-  FillDataToBitmap(src_w, src_h, &src);
-
-  SkBitmap cropped = skia::ImageOperations::CreateTiledBitmap(src, 4, 4,
-                                                              8, 8);
-  ASSERT_EQ(8, cropped.width());
-  ASSERT_EQ(8, cropped.height());
-
-  SkAutoLockPixels src_lock(src);
-  SkAutoLockPixels cropped_lock(cropped);
-  for (int y = 4; y < 12; y++) {
-    for (int x = 4; x < 12; x++) {
-      EXPECT_EQ(*src.getAddr32(x, y),
-                *cropped.getAddr32(x - 4, y - 4));
-    }
-  }
-}
-
-// Test whether our cropping correctly wraps across image boundaries.
-TEST(ImageOperations, CreateCroppedBitmapWrapping) {
-  int src_w = 16, src_h = 16;
-  SkBitmap src;
-  FillDataToBitmap(src_w, src_h, &src);
-
-  SkBitmap cropped = skia::ImageOperations::CreateTiledBitmap(
-      src, src_w / 2, src_h / 2, src_w, src_h);
-  ASSERT_EQ(src_w, cropped.width());
-  ASSERT_EQ(src_h, cropped.height());
-
-  SkAutoLockPixels src_lock(src);
-  SkAutoLockPixels cropped_lock(cropped);
-  for (int y = 0; y < src_h; y++) {
-    for (int x = 0; x < src_w; x++) {
-      EXPECT_EQ(*src.getAddr32(x, y),
-                *cropped.getAddr32((x + src_w / 2) % src_w,
-                                   (y + src_h / 2) % src_h));
-    }
-  }
-}
-