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- // Copyright 2018 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.
- #ifndef COMPONENTS_VIZ_TEST_GL_SCALER_TEST_UTIL_H_
- #define COMPONENTS_VIZ_TEST_GL_SCALER_TEST_UTIL_H_
- #include <stdint.h>
- #include <string>
- #include <vector>
- #include "base/memory/raw_ptr.h"
- #include "gpu/command_buffer/client/gles2_interface.h"
- #include "third_party/skia/include/core/SkBitmap.h"
- #include "third_party/skia/include/core/SkColor.h"
- #include "third_party/skia/include/core/SkRect.h"
- #include "ui/gfx/color_space.h"
- #include "ui/gfx/color_transform.h"
- #include "ui/gfx/geometry/size.h"
- namespace gfx {
- class Rect;
- }
- namespace viz {
- // A collection of utility functions used in pixel tests.
- class GLScalerTestUtil {
- public:
- struct ColorBar {
- SkIRect rect;
- SkColor4f color;
- };
- // The patterns that can be created by CreateCyclicalTestImage().
- enum CyclicalPattern {
- HORIZONTAL_STRIPES,
- VERTICAL_STRIPES,
- STAGGERED,
- };
- // Returns an SkBitmap with pixels allocated, having a RGBA format with
- // unpremultiplied alpha.
- static SkBitmap AllocateRGBABitmap(const gfx::Size& size);
- // Returns a |value| in the range [0.0,1.0] as an unsigned integer in the
- // range [0,255].
- static uint8_t ToClamped255(float value);
- // Return the SMPTE color bars that make up a test image, scaled to an image
- // of the given |size|.
- static std::vector<ColorBar> GetScaledSMPTEColorBars(const gfx::Size& size);
- // Create a SMPTE color bar test image, scaled to the given |size|.
- static SkBitmap CreateSMPTETestImage(const gfx::Size& size);
- // Returns true if the given |image| looks similar-enough to a scaled version
- // of a SMPTE color bar test image that was originally of |src_size| and
- // cropped to |src_rect|. |fuzzy_pixels| is used to ignore a border of pixels
- // surrounding each color bar, since the scaling algorithms may blend
- // in-between colors where the bars touch. |max_color_diff| controls what
- // "similar-enough" means: 0 for "exact," or otherwise some positive value
- // specifying the maximum color value difference; and is updated with the
- // the actual maximum.
- static bool LooksLikeSMPTETestImage(const SkBitmap& image,
- const gfx::Size& src_size,
- const gfx::Rect& src_rect,
- int fuzzy_pixels,
- float* max_color_diff);
- // Returns an image of the given |size| with the colors in |cycle| used to
- // generate a striped or staggered |pattern|. |rotation| specifies which index
- // in the |cycle| to start with.
- static SkBitmap CreateCyclicalTestImage(const gfx::Size& size,
- CyclicalPattern pattern,
- const std::vector<SkColor4f>& cycle,
- size_t rotation);
- // Returns the RGB/YUV color spaces used by default when color space
- // conversion is requested.
- static gfx::ColorSpace DefaultRGBColorSpace();
- static gfx::ColorSpace DefaultYUVColorSpace();
- // Performs an in-place transform of the given |image| from
- // DefaultRGBColorSpace() to DefaultYUVColorSpace(). The color channels (plus
- // one alpha) remain interleaved (i.e., no pixel blending or format transform
- // is being done).
- static void ConvertRGBABitmapToYUV(SkBitmap* image);
- static SkBitmap CopyAndConvertToRGBA(const SkBitmap& bitmap);
- // Performs an in-place swizzling of the red and blue color channels in the
- // given |image|.
- static void SwizzleBitmap(SkBitmap* image);
- // Returns a bitmap consisting of one color channel from every 4 pixels in a
- // |source| bitmap packed into a single quad. Thus, the resulting bitmap will
- // have 1/4 the width of the source bitmap. This is used to create the
- // expected output of the single-channel export shaders, and thus can be
- // considered a reference implementation of that.
- static SkBitmap CreatePackedPlanarBitmap(const SkBitmap& source, int channel);
- // Performs the inverse operation to CreatePackedPlanarBitmap(). This takes
- // all of the data in |plane| and uses it to populate a single color channel
- // of all the pixels of |out|. The |plane| can be a full-size or half-size
- // (subsampled) plane. The channels other than the one specified via |channel|
- // will be left unmodified.
- static void UnpackPlanarBitmap(const SkBitmap& plane,
- int channel,
- SkBitmap* out);
- // This takes all of the data in |plane| and uses it to populate a green and
- // blue color channels of all the pixels of |out|. The |plane| can be a
- // full-size or half-size (subsampled) plane. This leaves the R and A channels
- // of |out| unmodified.
- static void UnpackUVBitmap(const SkBitmap& plane, SkBitmap* out);
- // Returns the |source| bitmap, but with its content vertically flipped.
- static SkBitmap CreateVerticallyFlippedBitmap(const SkBitmap& source);
- // The area and color of the bars in a 1920x1080 HD SMPTE color bars test
- // image (https://commons.wikimedia.org/wiki/File:SMPTE_Color_Bars_16x9.svg).
- // The gray linear gradient bar is defined as half solid 0-level black and
- // half solid full-intensity white).
- static const ColorBar kSMPTEColorBars[30];
- static constexpr gfx::Size kSMPTEFullSize = gfx::Size(1920, 1080);
- #ifdef SK_CPU_BENDIAN
- // Bit shift offsets (within a uint32_t RGBA quad) to access each color
- // channel's byte.
- static constexpr int kRedShift = 24;
- static constexpr int kGreenShift = 16;
- static constexpr int kBlueShift = 8;
- static constexpr int kAlphaShift = 0;
- #else
- static constexpr int kRedShift = 0;
- static constexpr int kGreenShift = 8;
- static constexpr int kBlueShift = 16;
- static constexpr int kAlphaShift = 24;
- #endif
- };
- // A helper for tests to create textures, and download/upload RGBA textures
- // to/from SkBitmaps. All textures created by this helper will be deleted when
- // its destructor is invoked.
- class GLScalerTestTextureHelper {
- public:
- // |gl| context must outlive this instance.
- explicit GLScalerTestTextureHelper(gpu::gles2::GLES2Interface* gl);
- GLScalerTestTextureHelper(const GLScalerTestTextureHelper& other) = delete;
- GLScalerTestTextureHelper& operator=(const GLScalerTestTextureHelper& other) =
- delete;
- ~GLScalerTestTextureHelper();
- // Creates a fully-defined RGBA texture of the given |size|, returning its GL
- // name.
- GLuint CreateTexture(const gfx::Size& size);
- // Uploads the given RGBA |bitmap| to the GPU into a new texture, returning
- // its GL name.
- GLuint UploadTexture(const SkBitmap& bitmap);
- // Reads-back the |texture| which is of the given |size|, returning the result
- // as a RGBA SkBitmap.
- SkBitmap DownloadTexture(GLuint texture, const gfx::Size& size);
- private:
- const raw_ptr<gpu::gles2::GLES2Interface> gl_;
- std::vector<GLuint> textures_to_delete_;
- };
- } // namespace viz
- #endif // COMPONENTS_VIZ_TEST_GL_SCALER_TEST_UTIL_H_
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