Contents

• Dependencies
• Overview
• New Procedures and Functions
• New Tokens

Dependencies

The extension is written against the OpenGL 1.3 Specification.

GL_ARB_fragment_program is required.

GL_ARB_shadow is required.

GL_EXT_texture_rectange affects the definition of this extension.

Overview

This extension extends GL_ARB_fragment_program to remove the interaction with GL_ARB_shadow.

This extension defines the program option "ARB_fragment_program_shadow".

If a fragment program specifies the option "ARB_fragment_program_shadow"

SHADOW1D, SHADOW2D, SHADOWRECT

are added as texture targets. When shadow map comparisons are desired, specify the SHADOW1D, SHADOW2D, or SHADOWRECT texture targets in texture instructions.

Programs must assure that the comparison mode for each depth texture (TEXTURE_COMPARE_MODE) and/or the internal texture format (DEPTH_COMPONENT) and the targets of the texture lookup instructions match. Otherwise, if the comparison mode and/or the internal texture format are inconsistent with the texture target, the results of the texture lookup are undefined.

New Procedures and Functions

None

New Tokens

None