1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef SPRITE_H_ 6 #define SPRITE_H_ 7 8 #include <vector> 9 #include "ppapi/cpp/point.h" 10 #include "ppapi/cpp/rect.h" 11 #include "ppapi/cpp/size.h" 12 13 14 // A Sprite is a simple container of a pixel buffer. It knows how to 15 // composite itself to another pixel buffer of the same format. 16 class Sprite { 17 public: 18 // Initialize a Sprite to use the attached pixel buffer. The Sprite takes 19 // ownership of the pixel buffer, deleting it in the dtor. The pixel 20 // buffer is assumed to be 32-bit ARGB-8-8-8-8 pixel format, with pre- 21 // multiplied alpha. If |row_bytes| is 0, then the number of bytes per row 22 // is assumed to be size.width() * sizeof(uint32_t). 23 Sprite(uint32_t* pixel_buffer, const pp::Size& size, int32_t stride = 0); 24 25 // Delete the pixel buffer. It is assumed that the pixel buffer was created 26 // using malloc(). 27 ~Sprite(); 28 29 // Reset the internal pixel buffer to a new one. Deletes the old pixel 30 // buffer. Sprite takes ownership of the new pixel buffer. If |row_bytes| 31 // is 0, then the number of bytes per row is assumed to be size.width() * 32 // sizeof(uint32_t). 33 void SetPixelBuffer(uint32_t* pixel_buffer, 34 const pp::Size& size, 35 int32_t row_bytes); 36 37 // Composite the section of the Sprite contained in |src_rect| into the given 38 // pixel buffer at |dest_point|. Performs an average of the source and 39 // dest pixel, and all necessary clipping. 40 void CompositeFromRectToPoint(const pp::Rect& src_rect, 41 uint32_t* dest_pixel_buffer, 42 const pp::Rect& dest_bounds, 43 int32_t dest_row_bytes, 44 const pp::Point& dest_point) const; 45 46 // Accessors. 47 const pp::Size& size() const { 48 return pixel_buffer_size_; 49 } 50 51 private: 52 uint32_t* pixel_buffer_; 53 pp::Size pixel_buffer_size_; 54 int32_t row_bytes_; 55 }; 56 57 #endif // SPRITE_H_ 58
