shader.glsl

shader.glsl

#include "Uniforms.glsl"
#include "Samplers.glsl"
#include "Transform.glsl"
#include "ScreenPos.glsl"

varying highp vec2 vScreenPos;

void VS()
{
    mat4 modelMatrix = iModelMatrix;
    vec3 worldPos = GetWorldPos(modelMatrix);
    gl_Position = GetClipPos(worldPos);
    vScreenPos = GetScreenPosPreDiv(gl_Position);
}

void PS()
{ 
    //temp workaround - flip vertically:
    vec2 vTexCoord = vec2(vScreenPos.x, 1.0 - vScreenPos.y);

    mat4 ycbcrToRGBTransform = mat4(
        vec4(+1.0000, +1.0000, +1.0000, +0.0000),
        vec4(+0.0000, -0.3441, +1.7720, +0.0000),
        vec4(+1.4020, -0.7141, +0.0000, +0.0000),
        vec4(-0.7010, +0.5291, -0.8860, +1.0000));

    vec4 ycbcr = vec4(texture2D(sDiffMap, vTexCoord).r,
                      texture2D(sNormalMap, vTexCoord).ra, 1.0);
    gl_FragColor = ycbcrToRGBTransform * ycbcr;
}