Revert of Introduce components/display_compositor

components/display_compositor/gl_helper_scaling.h

Index: components/display_compositor/gl_helper_scaling.h
diff --git a/components/display_compositor/gl_helper_scaling.h b/components/display_compositor/gl_helper_scaling.h
deleted file mode 100644
index a2e5b61665ac05c6f858c9f20c862c502bbb25d4..0000000000000000000000000000000000000000
--- a/components/display_compositor/gl_helper_scaling.h
+++ /dev/null
@@ -1,208 +0,0 @@
-// Copyright (c) 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.
-
-#ifndef COMPONENTS_DISPLAY_COMPOSITOR_GL_HELPER_SCALING_H_
-#define COMPONENTS_DISPLAY_COMPOSITOR_GL_HELPER_SCALING_H_
-
-#include <deque>
-#include <map>
-#include <vector>
-
-#include "base/macros.h"
-#include "components/display_compositor/display_compositor_export.h"
-#include "components/display_compositor/gl_helper.h"
-#include "ui/gfx/geometry/rect.h"
-#include "ui/gfx/geometry/size.h"
-
-namespace display_compositor {
-
-class ShaderProgram;
-class ScalerImpl;
-class GLHelperTest;
-
-// Implements GPU texture scaling methods.
-// Note that you should probably not use this class directly.
-// See gl_helper.cc::CreateScaler instead.
-class DISPLAY_COMPOSITOR_EXPORT GLHelperScaling {
- public:
-  enum ShaderType {
-    SHADER_BILINEAR,
-    SHADER_BILINEAR2,
-    SHADER_BILINEAR3,
-    SHADER_BILINEAR4,
-    SHADER_BILINEAR2X2,
-    SHADER_BICUBIC_UPSCALE,
-    SHADER_BICUBIC_HALF_1D,
-    SHADER_PLANAR,
-    SHADER_YUV_MRT_PASS1,
-    SHADER_YUV_MRT_PASS2,
-  };
-
-  // Similar to ScalerInterface, but can generate multiple outputs.
-  // Used for YUV conversion in gl_helper.c
-  class DISPLAY_COMPOSITOR_EXPORT ShaderInterface {
-   public:
-    ShaderInterface() {}
-    virtual ~ShaderInterface() {}
-    // Note that the src_texture will have the min/mag filter set to GL_LINEAR
-    // and wrap_s/t set to CLAMP_TO_EDGE in this call.
-    virtual void Execute(GLuint source_texture,
-                         const std::vector<GLuint>& dest_textures) = 0;
-  };
-
-  typedef std::pair<ShaderType, bool> ShaderProgramKeyType;
-
-  GLHelperScaling(gpu::gles2::GLES2Interface* gl, GLHelper* helper);
-  ~GLHelperScaling();
-  void InitBuffer();
-
-  GLHelper::ScalerInterface* CreateScaler(GLHelper::ScalerQuality quality,
-                                          gfx::Size src_size,
-                                          gfx::Rect src_subrect,
-                                          const gfx::Size& dst_size,
-                                          bool vertically_flip_texture,
-                                          bool swizzle);
-
-  GLHelper::ScalerInterface* CreatePlanarScaler(const gfx::Size& src_size,
-                                                const gfx::Rect& src_subrect,
-                                                const gfx::Size& dst_size,
-                                                bool vertically_flip_texture,
-                                                bool swizzle,
-                                                const float color_weights[4]);
-
-  ShaderInterface* CreateYuvMrtShader(const gfx::Size& src_size,
-                                      const gfx::Rect& src_subrect,
-                                      const gfx::Size& dst_size,
-                                      bool vertically_flip_texture,
-                                      bool swizzle,
-                                      ShaderType shader);
-
- private:
-  // A ScaleOp represents a pass in a scaler pipeline, in one dimension.
-  // Note that when quality is GOOD, multiple scaler passes will be
-  // combined into one operation for increased performance.
-  // Exposed in the header file for testing purposes.
-  struct ScaleOp {
-    ScaleOp(int factor, bool x, int size)
-        : scale_factor(factor), scale_x(x), scale_size(size) {}
-
-    // Calculate a set of ScaleOp needed to convert an image of size
-    // |src| into an image of size |dst|. If |scale_x| is true, then
-    // the calculations are for the X axis of the image, otherwise Y.
-    // If |allow3| is true, we can use a SHADER_BILINEAR3 to replace
-    // a scale up and scale down with a 3-tap bilinear scale.
-    // The calculated ScaleOps are added to |ops|.
-    static void AddOps(int src,
-                       int dst,
-                       bool scale_x,
-                       bool allow3,
-                       std::deque<ScaleOp>* ops) {
-      int num_downscales = 0;
-      if (allow3 && dst * 3 >= src && dst * 2 < src) {
-        // Technically, this should be a scale up and then a
-        // scale down, but it makes the optimization code more
-        // complicated.
-        ops->push_back(ScaleOp(3, scale_x, dst));
-        return;
-      }
-      while ((dst << num_downscales) < src) {
-        num_downscales++;
-      }
-      if ((dst << num_downscales) != src) {
-        ops->push_back(ScaleOp(0, scale_x, dst << num_downscales));
-      }
-      while (num_downscales) {
-        num_downscales--;
-        ops->push_back(ScaleOp(2, scale_x, dst << num_downscales));
-      }
-    }
-
-    // Update |size| to its new size. Before calling this function
-    // |size| should be the size of the input image. After calling it,
-    // |size| will be the size of the image after this particular
-    // scaling operation.
-    void UpdateSize(gfx::Size* subrect) {
-      if (scale_x) {
-        subrect->set_width(scale_size);
-      } else {
-        subrect->set_height(scale_size);
-      }
-    }
-
-    // A scale factor of 0 means upscale
-    // 2 means 50% scale
-    // 3 means 33% scale, etc.
-    int scale_factor;
-    bool scale_x;    // Otherwise y
-    int scale_size;  // Size to scale to.
-  };
-
-  // Full specification for a single scaling stage.
-  struct ScalerStage {
-    ScalerStage(ShaderType shader_,
-                gfx::Size src_size_,
-                gfx::Rect src_subrect_,
-                gfx::Size dst_size_,
-                bool scale_x_,
-                bool vertically_flip_texture_,
-                bool swizzle_);
-    ScalerStage(const ScalerStage& other);
-    ShaderType shader;
-    gfx::Size src_size;
-    gfx::Rect src_subrect;
-    gfx::Size dst_size;
-    bool scale_x;
-    bool vertically_flip_texture;
-    bool swizzle;
-  };
-
-  // Compute a vector of scaler stages for a particular
-  // set of input/output parameters.
-  void ComputeScalerStages(GLHelper::ScalerQuality quality,
-                           const gfx::Size& src_size,
-                           const gfx::Rect& src_subrect,
-                           const gfx::Size& dst_size,
-                           bool vertically_flip_texture,
-                           bool swizzle,
-                           std::vector<ScalerStage>* scaler_stages);
-
-  // Take two queues of ScaleOp structs and generate a
-  // vector of scaler stages. This is the second half of
-  // ComputeScalerStages.
-  void ConvertScalerOpsToScalerStages(
-      GLHelper::ScalerQuality quality,
-      gfx::Size src_size,
-      gfx::Rect src_subrect,
-      const gfx::Size& dst_size,
-      bool vertically_flip_texture,
-      bool swizzle,
-      std::deque<GLHelperScaling::ScaleOp>* x_ops,
-      std::deque<GLHelperScaling::ScaleOp>* y_ops,
-      std::vector<ScalerStage>* scaler_stages);
-
-  scoped_refptr<ShaderProgram> GetShaderProgram(ShaderType type, bool swizzle);
-
-  // Interleaved array of 2-dimentional vertex positions (x, y) and
-  // 2-dimentional texture coordinates (s, t).
-  static const GLfloat kVertexAttributes[];
-
-  gpu::gles2::GLES2Interface* gl_;
-  GLHelper* helper_;
-
-  // The buffer that holds the vertices and the texture coordinates data for
-  // drawing a quad.
-  ScopedBuffer vertex_attributes_buffer_;
-
-  std::map<ShaderProgramKeyType, scoped_refptr<ShaderProgram>> shader_programs_;
-
-  friend class ShaderProgram;
-  friend class ScalerImpl;
-  friend class GLHelperBenchmark;
-  friend class GLHelperTest;
-  DISALLOW_COPY_AND_ASSIGN(GLHelperScaling);
-};
-
-}  // namespace display_compositor
-
-#endif  // COMPONENTS_DISPLAY_COMPOSITOR_GL_HELPER_SCALING_H_