JGL/assets/shader_programs/test_fragment.glsl

#version 120

#define J2D_DrawPoint 1
#define J2D_DrawPoints 2
#define J2D_DrawLine 3
#define J2D_DrawLines 4
#define J2D_DrawDottedLine 5
#define J2D_DrawDashedLine 6
#define J2D_DrawGradientLine 7
#define J2D_OutlineRect 8
#define J2D_OutlineRoundedRect 9
#define J2D_OutlineChamferRect 10
#define J2D_FillRect 11
#define J2D_FillGradientRect 12
#define J2D_FillRoundedRect 13
#define J2D_FillChamferRect 14
#define J2D_DrawRenderTarget 15
#define J2D_DrawPartialRenderTarget 16
#define J2D_DrawSprite 17
#define J2D_DrawAlphaMaskSprite 18
#define J2D_DrawPartialSprite 19
#define J2D_DrawMirrorSprite 20
#define J2D_OutlineCircle 21
#define J2D_FillCircle 22
#define J2D_OutlineTriangle 23
#define J2D_FillTriangle 24
#define J2D_FillGradientTriangle 25
#define J2D_DrawCubicBezierCurve 26
#define J2D_OutlinePolygon 27
#define J2D_DrawString 28
#define J2D_DrawArc 29


uniform int JGL_RENDERING_ROUTINE;
uniform bool JGL_INSTANCED_RENDERING;

// The number of texture units that have been set.
uniform int TEXTURE_UNIT_SET_COUNT;

// The color manually set with glColor4f, glColor4ubv etc.
varying vec4 v_color;

// Texture unit 0 - 7 (8 - 31 will come later).
uniform sampler2D GL_TEXTURE0;
uniform sampler2D GL_TEXTURE1;
uniform sampler2D GL_TEXTURE2;
uniform sampler2D GL_TEXTURE3;
uniform sampler2D GL_TEXTURE4;
uniform sampler2D GL_TEXTURE5;
uniform sampler2D GL_TEXTURE6;
uniform sampler2D GL_TEXTURE7;

// Texture coordinates.
varying vec2 GL_TEXTURE0_COORD;
varying vec2 GL_TEXTURE1_COORD;
varying vec2 GL_TEXTURE2_COORD;
varying vec2 GL_TEXTURE3_COORD;
varying vec2 GL_TEXTURE4_COORD;
varying vec2 GL_TEXTURE5_COORD;
varying vec2 GL_TEXTURE6_COORD;
varying vec2 GL_TEXTURE7_COORD;

void DrawColorOnly() {
    gl_FragColor = v_color;
}

void SampleTextureUnits() {
    if (JGL_RENDERING_ROUTINE == J2D_DrawString)
        gl_FragColor = vec4(v_color.rgb, v_color.a * texture2D(GL_TEXTURE0, GL_TEXTURE0_COORD).a);

    // Draw sprite, partial sprite, mirror sprite, render target, partial render target.
    else if (TEXTURE_UNIT_SET_COUNT == 1)
        gl_FragColor = v_color * texture2D(GL_TEXTURE0, GL_TEXTURE0_COORD);

    // Draw alpha masked sprite.
    else if (TEXTURE_UNIT_SET_COUNT == 2) {
        vec4 color_texture = texture2D(GL_TEXTURE0, GL_TEXTURE0_COORD);
        float alpha_mask = texture2D(GL_TEXTURE1, GL_TEXTURE1_COORD).a;
        gl_FragColor = vec4(v_color.rgb * color_texture.rgb, v_color.a * alpha_mask);
    }

}

void Default() {
    if (TEXTURE_UNIT_SET_COUNT == 0) {
        DrawColorOnly(); return;
    }
    SampleTextureUnits();
}

void main() {
/* If you want behavior per JGL draw function, Or for specific ones. The order here matters because some JGL functions call others.
    if (JGL_RENDERING_ROUTINE == J2D_DrawRenderTarget)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_DrawPartialRenderTarget)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_DrawAlphaMaskSprite)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_DrawMirrorSprite)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_DrawSprite)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_DrawPartialSprite)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_DrawPartialSprite)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_DrawString)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_DrawPoint)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_DrawPoints)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_DrawCubicBezierCurve)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_DrawLine)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_DrawLines)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_DrawDottedLine)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_DrawDashedLine)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_DrawGradientLine)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_OutlineRoundedRect)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_FillChamferRect)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_FillRoundedRect)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_FillGradientRect)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_OutlineRect)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_FillRect)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_OutlineCircle)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_FillCircle)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_OutlineTriangle)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_FillTriangle)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_FillGradientTriangle)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_OutlinePolygon)
        Default();
    else if (JGL_RENDERING_ROUTINE == J2D_DrawArc)
        Default();
    else { Default(); }
*/
    Default();
}