public static Program GetProgram()
{
if (_program == null)
{
var vertexShader = Effect.AddShaderInitCode() + @"
in vec4 aPosition;
in vec4 aColor;
in vec2 aTexCoords;
uniform mat4 uMvpMatrix;
uniform vec4 uAlpha;
out lowp vec4 vColor;
out lowp vec2 vTexCoords;
void main() {
gl_Position = uMvpMatrix * aPosition;
vColor = aColor * uAlpha;
vTexCoords = aTexCoords;
}";
var fragmentShader = Effect.AddShaderInitCode() + @"
in lowp vec4 vColor;
in lowp vec2 vTexCoords;
uniform lowp sampler2D uTexture;
out lowp vec4 fragColor;
void main() {
fragColor = texture(uTexture, vTexCoords) * vColor;
}";
_program = new Program(vertexShader, fragmentShader);
}
return(_program);
}
