Provided by: allegro5-doc_5.2.9.1+dfsg-1.1build4_all 

NAME
ALLEGRO_SHADER_PLATFORM - Allegro 5 API
SYNOPSIS
#include <allegro5/allegro.h>
typedef enum ALLEGRO_SHADER_PLATFORM ALLEGRO_SHADER_PLATFORM;
DESCRIPTION
The underlying platform which the ALLEGRO_SHADER(3alleg5) is built on top of, which dictates the language
used to program the shader.
• ALLEGRO_SHADER_AUTO - Pick a platform automatically given the current display flags.
• ALLEGRO_SHADER_GLSL - OpenGL Shading Language
• ALLEGRO_SHADER_HLSL - High Level Shader Language (for Direct3D)
• ALLEGRO_SHADER_AUTO_MINIMAL - Like ALLEGRO_SHADER_AUTO, but pick a more minimal implementation that may
not support alpha testing.
• ALLEGRO_SHADER_GLSL_MINIMAL - Minimal GLSL shader.
• ALLEGRO_SHADER_HLSL_MINIMAL - Minimal HLSL shader.
• ALLEGRO_SHADER_HLSL_SM_3_0 - HLSL shader using shader model 3_0.
SINCE
5.1.0
Allegro reference manual ALLEGRO_SHADER_PLATFORM(3alleg5)