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-rw-r--r--xfa_test/pdf/draw_utils.h94
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diff --git a/xfa_test/pdf/draw_utils.h b/xfa_test/pdf/draw_utils.h
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-// Copyright (c) 2011 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 PDF_DRAW_UTILS_H_
-#define PDF_DRAW_UTILS_H_
-
-#include <vector>
-
-#include "base/basictypes.h"
-#include "ppapi/cpp/image_data.h"
-#include "ppapi/cpp/rect.h"
-
-namespace chrome_pdf {
-
-const uint8 kOpaqueAlpha = 0xFF;
-const uint8 kTransparentAlpha = 0x00;
-
-void AlphaBlend(const pp::ImageData& src, const pp::Rect& src_rc,
- pp::ImageData* dest, const pp::Point& dest_origin,
- uint8 alpha_adjustment);
-
-// Fill rectangle with gradient horizontally or vertically. Start is a color of
-// top-left point of the rectangle, end color is a color of
-// top-right (horizontal==true) or bottom-left (horizontal==false) point.
-void GradientFill(pp::ImageData* image,
- const pp::Rect& rc,
- uint32 start_color,
- uint32 end_color,
- bool horizontal);
-
-// Fill dirty rectangle with gradient, where gradient color set for corners of
-// gradient rectangle. Parts of the dirty rect outside of gradient rect will
-// be unchanged.
-void GradientFill(pp::Instance* instance,
- pp::ImageData* image,
- const pp::Rect& dirty_rc,
- const pp::Rect& gradient_rc,
- uint32 start_color,
- uint32 end_color,
- bool horizontal,
- uint8 transparency);
-
-// Copy one image into another. If stretch is true, the result occupy the entire
-// dest_rc. If stretch is false, dest_rc.point will be used as an origin of the
-// result image. Copy will ignore all pixels with transparent alpha from the
-// source image.
-void CopyImage(const pp::ImageData& src, const pp::Rect& src_rc,
- pp::ImageData* dest, const pp::Rect& dest_rc,
- bool stretch);
-
-// Fill in rectangle with specified color.
-void FillRect(pp::ImageData* image, const pp::Rect& rc, uint32 color);
-
-// Shadow Matrix contains matrix for shadow rendering. To reduce amount of
-// calculations user may choose to cache matrix and reuse it if nothing changed.
-class ShadowMatrix {
- public:
- // Matrix parameters.
- // depth - how big matrix should be. Shadow will go smoothly across the
- // entire matrix from black to background color.
- // If factor == 1, smoothing will be linear from 0 to the end (depth),
- // if 0 < factor < 1, smoothing will drop faster near 0.
- // if factor > 1, smoothing will drop faster near the end (depth).
- ShadowMatrix(uint32 depth, double factor, uint32 background);
-
- ~ShadowMatrix();
-
- uint32 GetValue(int32 x, int32 y) const { return matrix_[y * depth_ + x]; }
-
- uint32 depth() const { return depth_; }
- double factor() const { return factor_; }
- uint32 background() const { return background_; }
-
- private:
- uint32 depth_;
- double factor_;
- uint32 background_;
- std::vector<uint32> matrix_;
-};
-
-// Draw shadow on the image using provided ShadowMatrix.
-// shadow_rc - rectangle occupied by shadow
-// object_rc - rectangle that drops the shadow
-// clip_rc - clipping region
-void DrawShadow(pp::ImageData* image,
- const pp::Rect& shadow_rc,
- const pp::Rect& object_rc,
- const pp::Rect& clip_rc,
- const ShadowMatrix& matrix);
-
-} // namespace chrome_pdf
-
-#endif // PDF_DRAW_UTILS_H_