google/grafikaArchived

Features

• Android Graphics Development - Provides a comprehensive suite of technical demonstrations for implementing and testing advanced OpenGL and hardware-accelerated rendering on Android.
• Video Playback - Provides technical demonstrations for decoding and rendering video tracks from local files using SurfaceViews.
• Performance Benchmarks - Provides a tool for measuring texture upload speeds and pixel read performance on Android graphics drivers.
• Graphics Driver Benchmarking - Provides specialized tools for measuring GPU texture upload speeds and pixel read times to identify graphics bottlenecks.
• Video Renderers - Implements video rendering directly to system compositor layers for improved battery efficiency and protected content support.
• Graphics Reference Applications - Provides a set of technical demonstrations for exercising media and graphics capabilities on the Android platform.
• OpenGL Graphics Programming - Provides a collection of examples for rendering graphics to textures and recording GPU output via framebuffer objects.
• Texture-Backed Rendering - Provides reference implementations for drawing graphics content onto a TextureView using a dedicated renderer thread.
• Texture-Backed Video Rendering - Renders video files from disk to a texture-backed view with aspect ratio management via a transformation matrix.
• Camera Integrations - Integrates real-time camera previews and directs live feeds into graphics textures for manipulation.
• MediaCodec Implementation Patterns - Implements technical patterns for decoding multiple video streams and recording device screen capture to movie files.
• Dynamic Resolution Scaling - Renders graphics at a lower native resolution and uses the GPU to scale the image to fit the screen.
• Texture Upload Benchmarks - Calculates the time required to upload image data to a GPU texture to evaluate graphics performance.
• Texture-Based Data Pipelines - Uses GPU textures to allow real-time transformations and scaling of camera feeds and graphics content.
• Simultaneous Recording Pipelines - Draws graphics to the screen and a video encoder simultaneously using a shared buffer to prevent redundant rendering.
• Screen Recording - Captures device displays or OpenGL frames and saves them to movie files using virtual displays.
• Simultaneous Framebuffer Recording - Draws graphics content to the screen and a video encoder simultaneously using framebuffer objects to avoid redundant rendering.
• Multi-Stream Concurrent Decoding - Processes and displays multiple video streams side-by-side while maintaining decoder state during screen rotations.
• System Compositor Rendering - Directs decoded video frames to system compositor layers for improved battery efficiency and protected content support.
• Video Playback Components - Decodes and renders video streams using SurfaceView and TextureView to optimize battery and performance.
• Live Camera Processing - Displays a real-time camera feed using a texture view while managing hardware camera lifecycle and orientation.
• Virtual Displays - Mirrors the device display output to a virtual surface for recording the entire system UI to a file.
• Resolution Scaling - Implements hardware-accelerated resolution scaling to render graphics at lower native resolutions and scale them to fit the screen.
• Camera Feed Capture - Directs a live camera feed into a graphics texture for real-time adjustments to zoom, size, and rotation.
• Video Capture Buffers - Implements circular memory buffers to record continuous camera input and save specific time windows of video.
• Driver Capability Querying - Queries the graphics driver for vendor, version, and extension details to determine device hardware capabilities.
• Circular Buffer Video Recording - Records camera input into a circular buffer, allowing a specific time window of video to be saved to storage.
• Frame Presentation Schedulers - Defers the display of rendered frames until a specific timestamp to ensure tight synchronization between audio and video.
• Hardware Scaling Benchmarks - Renders graphics with dynamic surface size changes to evaluate the efficiency of hardware-accelerated image scaling.
• GPU Frame Buffer Read Benchmarks - Measures the time taken to read pixels from a GPU frame buffer to identify performance bottlenecks.
• Camera Lifecycle Demonstrations - Provides reference implementations for rendering live camera previews and managing hardware camera lifecycles.
• Responsive Interface Threading - Offloads graphics processing and surface management to a background thread to ensure the main user interface remains responsive.

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