GLSL Notes

【GLSL Notes】

API of shader:

　　glCreateShader(), glShaderSource(), glCompileShader(), glGetShadrInfoLog(), glCreateProgram()

API of porgram:

　　glCreateProgram(), glAttachShader(), glDetashShader(), glLinkProgarm(), glGetProgarmInfoLog(), glUseProgram()

Resource Release：

　　glDeleteShader(), glDeleteProgram(), glIsProgram(), glIsShader(), glValidateProgram()

【类型限定符】

　　attribute, varying, uniform

　　glGetAttribLocation(), glBindAttribLocation(), glGetUniformLocation(), glVertexAttrib(), glVertexAtrribPointer()

【注意要点】

　　gl_position必须由顶点着色器更新，GL将会对此值进行插值，然后传递给片断着色器。

【OpenGLES】

　　OpenGL ES 3.0 is new in iOS 7 and adds a number of new features, including:

• Multiple render targets and transform feedback to enable deferred rendering and other graphics algorithms previously only available in desktop OpenGL
• OpenGL Shading Language ES 3.0 and integer textures, buffers and operations to enable general-purpose GPU computing
• New texture, buffer, and attribute formats for optimizing memory footprint and bandwidth