shaders

The default shader used by the framework. It implements the standard rendering pipeline for sprites, text and geometry.

This shader is automatically loaded by init and serves as the baseline for all 2D rendering. Copying this file is a good way to start writing custom shaders.

Features:

• Projects vertices using the global viewProjectionMatrix.
• Supports both Sprite and Font rendering (via getTexColor).
• Handles vertex colors (tinting).
• Handles color overrides.

Contents

@header package shaders
@include shader_header.glsl

@vs vs
@include shader_vs_core.glsl
void main() {
  gl_Position = getProjectedPosition(aPosition);

  passVertexData();
}
@end

@fs fs
@include shader_fs_core.glsl

out vec4 oColor;

void main() {
  vec4 texColor = getTexColor(vBytes, vUv);

  oColor = texColor * vColor;

  oColor.rgb = mix(oColor.rgb, vColorOverride.rgb, vColorOverride.a);
}
@end

@program quad vs fs

---

main

void main() {
  gl_Position = getProjectedPosition(aPosition);

  passVertexData();
}

The standard vertex entry point.

Projects the vertex position into clip space via getProjectedPosition.

Passes all standard attributes to the fragment stage via passVertexData.

---

main

void main() {
  vec4 texColor = getTexColor(vBytes, vUv);

  oColor = texColor * vColor;

  oColor.rgb = mix(oColor.rgb, vColorOverride.rgb, vColorOverride.a);
}

The standard fragment entry point.

Fetches the base color via getTexColor.

Multiplies by the vertex vColor (tint).

Mixes in the vColorOverride.

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