cc/scheduler/texture_uploader.h

   1 // Copyright 2012 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 CC_SCHEDULER_TEXTURE_UPLOADER_H_
   6 #define CC_SCHEDULER_TEXTURE_UPLOADER_H_
   7
   8 #include <set>
   9
  10 #include "base/basictypes.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "cc/base/cc_export.h"
  13 #include "cc/base/scoped_ptr_deque.h"
  14 #include "third_party/khronos/GLES2/gl2.h"
  15
  16 namespace WebKit { class WebGraphicsContext3D; }
  17
  18 namespace gfx {
  19 class Rect;
  20 class Size;
  21 class Vector2d;
  22 }
  23
  24 namespace cc {
  25
  26 class CC_EXPORT TextureUploader {
  27  public:
  28   static scoped_ptr<TextureUploader> Create(
  29       WebKit::WebGraphicsContext3D* context,
  30       bool use_map_tex_sub_image,
  31       bool use_shallow_flush) {
  32     return make_scoped_ptr(
  33         new TextureUploader(context, use_map_tex_sub_image, use_shallow_flush));
  34   }
  35   ~TextureUploader();
  36
  37   size_t NumBlockingUploads();
  38   void MarkPendingUploadsAsNonBlocking();
  39   double EstimatedTexturesPerSecond();
  40
  41   // Let content_rect be a rectangle, and let content_rect be a sub-rectangle of
  42   // content_rect, expressed in the same coordinate system as content_rect. Let
  43   // image be a buffer for content_rect. This function will copy the region
  44   // corresponding to source_rect to dest_offset in this sub-image.
  45   void Upload(const uint8* image,
  46               gfx::Rect content_rect,
  47               gfx::Rect source_rect,
  48               gfx::Vector2d dest_offset,
  49               GLenum format,
  50               gfx::Size size);
  51
  52   void Flush();
  53   void ReleaseCachedQueries();
  54
  55  private:
  56   class Query {
  57    public:
  58     static scoped_ptr<Query> Create(WebKit::WebGraphicsContext3D* context) {
  59       return make_scoped_ptr(new Query(context));
  60     }
  61
  62     virtual ~Query();
  63
  64     void Begin();
  65     void End();
  66     bool IsPending();
  67     unsigned Value();
  68     size_t TexturesUploaded();
  69     void mark_as_non_blocking() {
  70       is_non_blocking_ = true;
  71     }
  72     bool is_non_blocking() const {
  73       return is_non_blocking_;
  74     }
  75
  76    private:
  77     explicit Query(WebKit::WebGraphicsContext3D* context);
  78
  79     WebKit::WebGraphicsContext3D* context_;
  80     unsigned query_id_;
  81     unsigned value_;
  82     bool has_value_;
  83     bool is_non_blocking_;
  84
  85     DISALLOW_COPY_AND_ASSIGN(Query);
  86   };
  87
  88   TextureUploader(WebKit::WebGraphicsContext3D* context,
  89                   bool use_map_tex_sub_image,
  90                   bool use_shallow_flush);
  91
  92   void BeginQuery();
  93   void EndQuery();
  94   void ProcessQueries();
  95
  96   void UploadWithTexSubImage(const uint8* image,
  97                              gfx::Rect image_rect,
  98                              gfx::Rect source_rect,
  99                              gfx::Vector2d dest_offset,
 100                              GLenum format);
 101   void UploadWithMapTexSubImage(const uint8* image,
 102                                 gfx::Rect image_rect,
 103                                 gfx::Rect source_rect,
 104                                 gfx::Vector2d dest_offset,
 105                                 GLenum format);
 106
 107   WebKit::WebGraphicsContext3D* context_;
 108   ScopedPtrDeque<Query> pending_queries_;
 109   ScopedPtrDeque<Query> available_queries_;
 110   std::multiset<double> textures_per_second_history_;
 111   size_t num_blocking_texture_uploads_;
 112
 113   bool use_map_tex_sub_image_;
 114   size_t sub_image_size_;
 115   scoped_ptr<uint8[]> sub_image_;
 116
 117   bool use_shallow_flush_;
 118   size_t num_texture_uploads_since_last_flush_;
 119
 120   DISALLOW_COPY_AND_ASSIGN(TextureUploader);
 121 };
 122
 123 }  // namespace cc
 124
 125 #endif  // CC_SCHEDULER_TEXTURE_UPLOADER_H_