Surface
OES external-texture variant of SurfaceQuadShaderProgram used when the interior texture has target = GL_TEXTURE_EXTERNAL_OES (typically a SurfaceTexture on Android driven by MediaPlayer / MediaCodec / Camera2). Identical homography surface-quad shader; only the fragment-stage sampler type changes:
#extension GL_OES_EGL_image_external : requireat the top of the fragment source, andsamplerExternalOESin place ofsampler2DfortexSampler.
Both edits are derived from the parent's source at construction so the kernel stays the single source of truth: touch SurfaceQuadShaderProgram's shader strings and the OES variant follows automatically.
Available on Android (GLES 2+ via the GL_OES_EGL_image_external extension); other targets have no OES producer wired up.
Properties
Functions
Load the ground-to-image Matrix3 for this draw. The fragment shader applies it to each fragment's local (lon, lat) and divides by w to land in unit-square image space. Skips the upload when the matrix matches what's already on the GPU - covers the common case of static photos and paused video, where re-binding the same surface drawable on every render frame would otherwise re-upload an unchanged value.
Frees any resources associated with this instance. After this method returns the rendering resource is invalid, and any associated GL object is deleted.