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c57aff1800
This is part of a larger effort to expose the difference between GrDirectContext, which runs on the GPU thread and can directly perform operations like uploading textures, and GrRecordingContext, which can only queue up work to be delivered to the GrDirectContext later.
104 lines
3.2 KiB
C++
104 lines
3.2 KiB
C++
// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "flutter/shell/platform/android/android_external_texture_gl.h"
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#include <GLES/glext.h>
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#include "third_party/skia/include/gpu/GrBackendSurface.h"
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namespace flutter {
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AndroidExternalTextureGL::AndroidExternalTextureGL(
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int64_t id,
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const fml::jni::JavaObjectWeakGlobalRef& surface_texture,
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std::shared_ptr<PlatformViewAndroidJNI> jni_facade)
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: Texture(id),
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jni_facade_(jni_facade),
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surface_texture_(surface_texture),
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transform(SkMatrix::I()) {}
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AndroidExternalTextureGL::~AndroidExternalTextureGL() {
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if (state_ == AttachmentState::attached) {
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glDeleteTextures(1, &texture_name_);
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}
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}
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void AndroidExternalTextureGL::OnGrContextCreated() {
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state_ = AttachmentState::uninitialized;
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}
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void AndroidExternalTextureGL::MarkNewFrameAvailable() {
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new_frame_ready_ = true;
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}
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void AndroidExternalTextureGL::Paint(SkCanvas& canvas,
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const SkRect& bounds,
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bool freeze,
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GrDirectContext* context,
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SkFilterQuality filter_quality) {
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if (state_ == AttachmentState::detached) {
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return;
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}
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if (state_ == AttachmentState::uninitialized) {
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glGenTextures(1, &texture_name_);
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Attach(static_cast<jint>(texture_name_));
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state_ = AttachmentState::attached;
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}
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if (!freeze && new_frame_ready_) {
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Update();
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new_frame_ready_ = false;
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}
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GrGLTextureInfo textureInfo = {GL_TEXTURE_EXTERNAL_OES, texture_name_,
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GL_RGBA8_OES};
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GrBackendTexture backendTexture(1, 1, GrMipMapped::kNo, textureInfo);
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sk_sp<SkImage> image = SkImage::MakeFromTexture(
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canvas.getGrContext(), backendTexture, kTopLeft_GrSurfaceOrigin,
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kRGBA_8888_SkColorType, kPremul_SkAlphaType, nullptr);
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if (image) {
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SkAutoCanvasRestore autoRestore(&canvas, true);
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canvas.translate(bounds.x(), bounds.y());
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canvas.scale(bounds.width(), bounds.height());
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if (!transform.isIdentity()) {
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SkMatrix transformAroundCenter(transform);
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transformAroundCenter.preTranslate(-0.5, -0.5);
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transformAroundCenter.postScale(1, -1);
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transformAroundCenter.postTranslate(0.5, 0.5);
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canvas.concat(transformAroundCenter);
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}
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SkPaint paint;
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paint.setFilterQuality(filter_quality);
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canvas.drawImage(image, 0, 0, &paint);
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}
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}
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void AndroidExternalTextureGL::UpdateTransform() {
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jni_facade_->SurfaceTextureGetTransformMatrix(surface_texture_, transform);
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}
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void AndroidExternalTextureGL::OnGrContextDestroyed() {
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if (state_ == AttachmentState::attached) {
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Detach();
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}
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state_ = AttachmentState::detached;
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}
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void AndroidExternalTextureGL::Attach(jint textureName) {
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jni_facade_->SurfaceTextureAttachToGLContext(surface_texture_, textureName);
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}
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void AndroidExternalTextureGL::Update() {
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jni_facade_->SurfaceTextureUpdateTexImage(surface_texture_);
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UpdateTransform();
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}
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void AndroidExternalTextureGL::Detach() {
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jni_facade_->SurfaceTextureDetachFromGLContext(surface_texture_);
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}
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void AndroidExternalTextureGL::OnTextureUnregistered() {}
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} // namespace flutter
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