iOS Chromoting Client

remoting/ios/ui/desktop_texture.mm

+// Copyright 2014 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.
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+#import "remoting/ios/ui/desktop_texture.h"
+
+@implementation DesktopTexture
+
+- (const webrtc::DesktopSize&)textureSize {
+  return _textureSize;
+}
+
+- (void)setTextureSize:(const webrtc::DesktopSize&)size {
+  if (!_textureSize.equals(size)) {
+    _textureSize.set(size.width(), size.height());
+    _needInitialize = true;
+  }
+}
+
+- (void)bindToEffect:(GLKEffectPropertyTexture*)effectProperty {
+  glGenTextures(1, &_textureId);
+  [Utility bindTextureForIOS:_textureId];
+
+  // This is the HOST Desktop layer, and each draw will always replace what is
+  // currently in the draw context
+  effectProperty.target = GLKTextureTarget2D;
+  effectProperty.name = _textureId;
+  effectProperty.envMode = GLKTextureEnvModeReplace;
+  effectProperty.enabled = GL_TRUE;
+
+  [Utility logGLErrorCode:@"DesktopTexture bindToTexture"];
+  // Release context
+  glBindTexture(GL_TEXTURE_2D, 0);
+}
+
+- (BOOL)needDraw {
+  return _needInitialize;
+}
+
+- (void)drawRegion:(GLRegion*)region rect:(CGRect)rect {
+  if (_textureSize.height() == 0 && _textureSize.width() == 0) {
+    return;
+  }
+
+  [Utility bindTextureForIOS:_textureId];
+
+  if (_needInitialize) {
+    glTexImage2D(GL_TEXTURE_2D,
+                 0,
+                 GL_RGBA,
+                 _textureSize.width(),
+                 _textureSize.height(),
+                 0,
+                 GL_RGBA,
+                 GL_UNSIGNED_BYTE,
+                 NULL);
+
+    [Utility logGLErrorCode:@"DesktopTexture initializeTextureSurfaceWithSize"];
+    _needInitialize = false;
+  }
+
+  [Utility drawSubRectToGLFromRectOfSize:_textureSize
+                                 subRect:webrtc::DesktopRect::MakeXYWH(
+                                             region->offset->x(),
+                                             region->offset->y(),
+                                             region->image->size().width(),
+                                             region->image->size().height())
+                                    data:region->image->data()];
+
+  [Utility logGLErrorCode:@"DesktopTexture drawRegion"];
+  // Release context
+  glBindTexture(GL_TEXTURE_2D, 0);
+}
+
+- (void)releaseTexture {
+  glDeleteTextures(1, &_textureId);
+}
+
+@end