diff options
| -rw-r--r-- | src/mesa/main/varray.c | 24 | ||||
| -rw-r--r-- | src/mesa/main/varray.h | 2 |
2 files changed, 26 insertions, 0 deletions
diff --git a/src/mesa/main/varray.c b/src/mesa/main/varray.c index abdaf961505..dff00700430 100644 --- a/src/mesa/main/varray.c +++ b/src/mesa/main/varray.c @@ -1149,6 +1149,30 @@ _mesa_VertexAttribDivisor(GLuint index, GLuint divisor) } +unsigned +_mesa_primitive_restart_index(const struct gl_context *ctx, GLenum ib_type) +{ + /* From the OpenGL 4.3 core specification, page 302: + * "If both PRIMITIVE_RESTART and PRIMITIVE_RESTART_FIXED_INDEX are + * enabled, the index value determined by PRIMITIVE_RESTART_FIXED_INDEX + * is used." + */ + if (ctx->Array.PrimitiveRestartFixedIndex) { + switch (ib_type) { + case GL_UNSIGNED_BYTE: + return 0xff; + case GL_UNSIGNED_SHORT: + return 0xffff; + case GL_UNSIGNED_INT: + return 0xffffffff; + default: + assert(!"_mesa_primitive_restart_index: Invalid index buffer type."); + } + } + + return ctx->Array.RestartIndex; +} + /** * Copy one client vertex array to another. diff --git a/src/mesa/main/varray.h b/src/mesa/main/varray.h index b3d5a6a9faa..a178bc13c9e 100644 --- a/src/mesa/main/varray.h +++ b/src/mesa/main/varray.h @@ -248,6 +248,8 @@ _mesa_PrimitiveRestartIndex(GLuint index); extern void GLAPIENTRY _mesa_VertexAttribDivisor(GLuint index, GLuint divisor); +extern unsigned +_mesa_primitive_restart_index(const struct gl_context *ctx, GLenum ib_type); extern void _mesa_copy_client_array(struct gl_context *ctx, |