raylib default shader

The default shaders included in raylib defines the following default input and output parameters if no custom shader is provided by user.

For custom shaders usage check raylib custom shader page.

The default shader source is embedded as a string in function rlLoadShaderDefault, which is implemented in the rlgl.h module. Note that there are multiple GLSL shader versions for the multiple OpenGL versions supported.

default vertex shader input/output parameters

OPENGL_ES2 or OPENGL_21

attribute vec3 vertexPosition;   // Vertex input attribute: position
attribute vec2 vertexTexCoord;   // Vertex input attribute: texture coordinate
attribute vec4 vertexColor;      // Vertex input attribute: color
varying vec2 fragTexCoord;       // To-fragment attribute: texture coordinate
varying vec4 fragColor;          // To-fragment attribute: color

OPENGL_33

in vec3 vertexPosition;     // Vertex input attribute: position
in vec2 vertexTexCoord;     // Vertex input attribute: texture coordinate
in vec4 vertexColor;        // Vertex input attribute: color
out vec2 fragTexCoord;      // To-fragment attribute: texture coordinate
out vec4 fragColor;         // To-fragment attribute: color

All

uniform mat4 mvp;           // Model-View-Projection matrix

default fragment shader input/output parameters

OPENGL_ES2 or OPENGL_21

varying vec2 fragTexCoord;  // Fragment input attribute: texture coordinate
varying vec4 fragColor;     // Fragment input attribute: color

OPENGL_ES2 also defines:

precision mediump float;    // OpenGL ES 2.0 optimization, using 16bit floats

OPENGL_33

in vec2 fragTexCoord;       // Fragment input attribute: texture coordinate
in vec4 fragColor;          // Fragment input attribute: color
out vec4 finalColor;        // Fragment output: color

All

uniform sampler2D texture0; // Fragment input texture (always required, could be a white pixel)
uniform vec4 colDiffuse;    // Fragment input color diffuse (multiplied by texture color)

NOTE: On OPENGL_ES2 and OPENGL_21 we use the default built-in fragment output gl_FragColor (same as the explicitly defined finalColor).