Flutter Windows Embedder
external_texture_pixelbuffer.cc
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1 // Copyright 2013 The Flutter 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 
6 
7 namespace flutter {
8 
11  void* user_data,
12  std::shared_ptr<egl::ProcTable> gl)
13  : texture_callback_(texture_callback),
14  user_data_(user_data),
15  gl_(std::move(gl)) {}
16 
18  if (gl_texture_ != 0) {
19  gl_->DeleteTextures(1, &gl_texture_);
20  }
21 }
22 
24  size_t width,
25  size_t height,
26  FlutterOpenGLTexture* opengl_texture) {
27  if (!CopyPixelBuffer(width, height)) {
28  return false;
29  }
30 
31  // Populate the texture object used by the engine.
32  opengl_texture->target = GL_TEXTURE_2D;
33  opengl_texture->name = gl_texture_;
34  opengl_texture->format = GL_RGBA8_OES;
35  opengl_texture->destruction_callback = nullptr;
36  opengl_texture->user_data = nullptr;
37  opengl_texture->width = width;
38  opengl_texture->height = height;
39 
40  return true;
41 }
42 
43 bool ExternalTexturePixelBuffer::CopyPixelBuffer(size_t& width,
44  size_t& height) {
45  const FlutterDesktopPixelBuffer* pixel_buffer =
46  texture_callback_(width, height, user_data_);
47  if (!pixel_buffer || !pixel_buffer->buffer) {
48  return false;
49  }
50  width = pixel_buffer->width;
51  height = pixel_buffer->height;
52 
53  if (gl_texture_ == 0) {
54  gl_->GenTextures(1, &gl_texture_);
55 
56  gl_->BindTexture(GL_TEXTURE_2D, gl_texture_);
57  gl_->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
58  gl_->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
59  gl_->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
60  gl_->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
61 
62  } else {
63  gl_->BindTexture(GL_TEXTURE_2D, gl_texture_);
64  }
65  gl_->TexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, pixel_buffer->width,
66  pixel_buffer->height, 0, GL_RGBA, GL_UNSIGNED_BYTE,
67  pixel_buffer->buffer);
68  if (pixel_buffer->release_callback) {
69  pixel_buffer->release_callback(pixel_buffer->release_context);
70  }
71  return true;
72 }
73 
74 } // namespace flutter
external_texture_pixelbuffer.h
flutter::ExternalTexturePixelBuffer::PopulateTexture
bool PopulateTexture(size_t width, size_t height, FlutterOpenGLTexture *opengl_texture) override
Definition: external_texture_pixelbuffer.cc:23
user_data
void * user_data
Definition: flutter_windows_view_unittests.cc:52
FlutterDesktopPixelBuffer
Definition: flutter_texture_registrar.h:56
FlutterDesktopPixelBuffer::release_context
void * release_context
Definition: flutter_texture_registrar.h:66
flutter
Definition: accessibility_bridge_windows.cc:11
FlutterDesktopPixelBufferTextureCallback
const typedef FlutterDesktopPixelBuffer *(* FlutterDesktopPixelBufferTextureCallback)(size_t width, size_t height, void *user_data)
Definition: flutter_texture_registrar.h:116
FlutterDesktopPixelBuffer::buffer
const uint8_t * buffer
Definition: flutter_texture_registrar.h:58
flutter::ExternalTexturePixelBuffer::ExternalTexturePixelBuffer
ExternalTexturePixelBuffer(const FlutterDesktopPixelBufferTextureCallback texture_callback, void *user_data, std::shared_ptr< egl::ProcTable > gl)
Definition: external_texture_pixelbuffer.cc:9
FlutterDesktopPixelBuffer::width
size_t width
Definition: flutter_texture_registrar.h:60
flutter::ExternalTexturePixelBuffer::~ExternalTexturePixelBuffer
virtual ~ExternalTexturePixelBuffer()
Definition: external_texture_pixelbuffer.cc:17
FlutterDesktopPixelBuffer::release_callback
void(* release_callback)(void *release_context)
Definition: flutter_texture_registrar.h:64
FlutterDesktopPixelBuffer::height
size_t height
Definition: flutter_texture_registrar.h:62
texture_callback
FlutterDesktopPixelBufferTextureCallback texture_callback
Definition: texture_registrar_unittests.cc:26