#version 100
// Copyright 2021 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// ES 2 vertex shader that applies the 4 * 4 transformation matrices
// uTransformationMatrix and the uTexTransformationMatrix.

attribute vec4 aFramePosition;
uniform mat4 uTransformationMatrix;
uniform mat4 uTexTransformationMatrix;
varying vec2 vTexSamplingCoord;
void main() {
  gl_Position = uTransformationMatrix * aFramePosition;
  vec4 texturePosition = vec4(aFramePosition.x * 0.5 + 0.5,
                              aFramePosition.y * 0.5 + 0.5, 0.0, 1.0);
  vTexSamplingCoord = (uTexTransformationMatrix * texturePosition).xy;
}