@theatrejs/theatrejs
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🎮 A JavaScript 2D Game Engine focused on creating pixel art games.
112 lines (88 loc) • 2.52 kB
JavaScript
/**
* Static default shader sources.
*
* @example
*
* const sourceFragment = Shader.sourceFragment;
* const sourceVertex = Shader.sourceVertex;
*/
class Shader {
/**
* @typedef {('vec2' | 'vec3')} TypeTypeAttribute A type of attribute.
* @protected
*
* @memberof Shader
*/
/**
* @typedef {('bool' | 'bool[]' | 'float' | 'float[]' | 'int' | 'int[]' | 'mat4' | 'mat4[]' | 'sampler2D' | 'vec2' | 'vec2[]' | 'vec3' | 'vec3[]')} TypeTypeUniform A type of uniform.
* @protected
*
* @memberof Shader
*/
/**
* Stores the attributes needed by the shader program.
* @type {Object<string, TypeTypeAttribute>}
* @public
* @readonly
* @static
*/
static attributes = {
'attributePosition': 'vec2',
'attributeUvmapping': 'vec2'
};
/**
* Stores the fragment shader source.
* @type {string}
* @public
* @readonly
* @static
*/
static sourceFragment = (
'precision highp float;' +
'uniform sampler2D uniformTexture;' +
'varying vec2 varyingUvmapping;' +
'void main(void) {' +
'gl_FragColor = texture2D(uniformTexture, varyingUvmapping);' +
'}'
);
/**
* Stores the vertex shader source.
* @type {string}
* @public
* @readonly
* @static
*/
static sourceVertex = (
'attribute vec2 attributePosition;' +
'attribute vec2 attributeUvmapping;' +
'uniform vec2 uniformAspect;' +
'uniform vec2 uniformSize;' +
'uniform vec2 uniformTranslation;' +
'uniform vec2 uniformTranslationPointOfView;' +
'varying vec2 varyingUvmapping;' +
'void main(void) {' +
'varyingUvmapping = attributeUvmapping;' +
'vec2 position = (attributePosition * uniformSize + uniformTranslation);' +
'vec2 projection = 2.0 * (position - uniformTranslationPointOfView) / uniformAspect;' +
'gl_Position = vec4(projection, 0.0, 1.0);' +
'}'
);
/**
* Stores the uniforms needed by the shader program.
* @type {Object<string, TypeTypeUniform>}
* @public
* @readonly
* @static
*/
static uniforms = {
'uniformAspect': 'vec2',
'uniformSize': 'vec2',
'uniformTexture': 'sampler2D',
'uniformTranslation': 'vec2',
'uniformTranslationPointOfView': 'vec2'
};
}
export {
Shader
};
export default Shader;