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| 1 // Copyright 2014 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 #include "ui/gl/gl_image_surface_texture.h" | |
| 6 | |
| 7 #include "base/trace_event/trace_event.h" | |
| 8 #include "ui/gl/android/surface_texture.h" | |
| 9 | |
| 10 namespace gfx { | |
| 11 | |
| 12 GLImageSurfaceTexture::GLImageSurfaceTexture(const gfx::Size& size) | |
| 13 : size_(size), texture_id_(0) { | |
| 14 } | |
| 15 | |
| 16 GLImageSurfaceTexture::~GLImageSurfaceTexture() { | |
| 17 DCHECK(!surface_texture_.get()); | |
| 18 DCHECK_EQ(0, texture_id_); | |
| 19 } | |
| 20 | |
| 21 bool GLImageSurfaceTexture::Initialize(SurfaceTexture* surface_texture) { | |
| 22 DCHECK(!surface_texture_.get()); | |
| 23 surface_texture_ = surface_texture; | |
| 24 return true; | |
| 25 } | |
| 26 | |
| 27 void GLImageSurfaceTexture::Destroy(bool have_context) { | |
| 28 surface_texture_ = NULL; | |
| 29 texture_id_ = 0; | |
| 30 } | |
| 31 | |
| 32 gfx::Size GLImageSurfaceTexture::GetSize() { return size_; } | |
| 33 | |
| 34 bool GLImageSurfaceTexture::BindTexImage(unsigned target) { | |
| 35 TRACE_EVENT0("gpu", "GLImageSurfaceTexture::BindTexImage"); | |
| 36 | |
| 37 if (target != GL_TEXTURE_EXTERNAL_OES) { | |
| 38 LOG(ERROR) | |
| 39 << "Surface texture can only be bound to TEXTURE_EXTERNAL_OES target"; | |
| 40 return false; | |
| 41 } | |
| 42 | |
| 43 GLint texture_id; | |
| 44 glGetIntegerv(GL_TEXTURE_BINDING_EXTERNAL_OES, &texture_id); | |
| 45 DCHECK(texture_id); | |
| 46 | |
| 47 if (texture_id_ && texture_id_ != texture_id) { | |
| 48 LOG(ERROR) << "Surface texture can only be bound to one texture ID"; | |
| 49 return false; | |
| 50 } | |
| 51 | |
| 52 DCHECK(surface_texture_.get()); | |
| 53 if (texture_id != texture_id_) { | |
| 54 // Note: Surface textures used as gpu memory buffers are created with an | |
| 55 // initial dummy texture id of 0. We need to call DetachFromGLContext() here | |
| 56 // to detach from the dummy texture before we can attach to a real texture | |
| 57 // id. DetachFromGLContext() will delete the texture for the current | |
| 58 // attachment point so it's important that this is never called when | |
| 59 // attached to a real texture id. Detaching from the dummy texture id should | |
| 60 // not cause any problems as the GL should silently ignore 0 when passed to | |
| 61 // glDeleteTextures. | |
| 62 DCHECK_EQ(0, texture_id_); | |
| 63 surface_texture_->DetachFromGLContext(); | |
| 64 | |
| 65 // This will attach the surface texture to the texture currently bound to | |
| 66 // GL_TEXTURE_EXTERNAL_OES target. | |
| 67 surface_texture_->AttachToGLContext(); | |
| 68 texture_id_ = texture_id; | |
| 69 } | |
| 70 | |
| 71 surface_texture_->UpdateTexImage(); | |
| 72 return true; | |
| 73 } | |
| 74 | |
| 75 bool GLImageSurfaceTexture::CopyTexImage(unsigned target) { | |
| 76 return false; | |
| 77 } | |
| 78 | |
| 79 bool GLImageSurfaceTexture::ScheduleOverlayPlane(gfx::AcceleratedWidget widget, | |
| 80 int z_order, | |
| 81 OverlayTransform transform, | |
| 82 const Rect& bounds_rect, | |
| 83 const RectF& crop_rect) { | |
| 84 return false; | |
| 85 } | |
| 86 | |
| 87 } // namespace gfx | |
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