Function drawTextureProgram

tfjs-react-native/src/camera/camera_webgl_util.ts:308–331

(
    gl: WebGL2RenderingContext, flipHorizontal: boolean, flipVertical: boolean,
    rotation: Rotation)

}

export function drawTextureProgram(
    gl: WebGL2RenderingContext, flipHorizontal: boolean, flipVertical: boolean,
    rotation: Rotation): ProgramObjects {
  if (!programCacheByContext.has(gl)) {
    programCacheByContext.set(gl, new Map());
  }
  const programCache = programCacheByContext.get(gl);

  const cacheKey = `drawTexture_${flipHorizontal}_${flipVertical}_${rotation}`;
  if (!programCache.has(cacheKey)) {
    const vertSource = drawTextureProgramInfo.vertexShaderSource(
        flipHorizontal, flipVertical, rotation);
    const fragSource = drawTextureProgramInfo.fragmentShaderSource();

    const vertices = drawTextureProgramInfo.vertices();
    const texCoords = drawTextureProgramInfo.texCoords();

    const programObjects =
        createProgramObjects(gl, vertSource, fragSource, vertices, texCoords);

    programCache.set(cacheKey, programObjects);
  }
  return programCache.get(cacheKey);
}

function resizeProgram(
    gl: WebGL2RenderingContext, sourceDims: Dimensions, targetDims: Dimensions,