From 37f278000c7a1a6d15eeeed4e52cdea3063c0a0f Mon Sep 17 00:00:00 2001 From: Kenneth Graunke Date: Sat, 25 May 2013 08:19:40 -0700 Subject: [PATCH] vbo: Ignore PRIMITIVE_RESTART_FIXED_INDEX for glDrawArrays(). The derived _PrimitiveRestart enable flag combines the PrimitiveRestart and PrimitiveRestartFixedIndex enable flags. However, DrawArrays is not supposed to do FixedIndex restart: From the OpenGL 4.3 Core specification, section 10.3.5 (page 302): "If PRIMITIVE_RESTART_FIXED_INDEX is enabled, primitive restart is not performed for array elements transferred by any drawing command not taking a type parameter, including all of the *Draw* commands other than *DrawElements*." The OpenGL ES 3.0 specification agrees by omission: "When DrawElements, DrawElementsInstanced, or DrawRangeElements transfers a set of generic attribute array elements to the GL..." Notably, DrawArrays is not included in the list of draw calls that take PRIMITIVE_RESTART_FIXED_INDEX into consideration. Signed-off-by: Kenneth Graunke Reviewed-by: Eric Anholt Reviewed-by: Ian Romanick --- src/mesa/vbo/vbo_exec_array.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/src/mesa/vbo/vbo_exec_array.c b/src/mesa/vbo/vbo_exec_array.c index cf766af9056..cadb203c3cf 100644 --- a/src/mesa/vbo/vbo_exec_array.c +++ b/src/mesa/vbo/vbo_exec_array.c @@ -577,10 +577,10 @@ vbo_draw_arrays(struct gl_context *ctx, GLenum mode, GLint start, prim[0].base_instance = baseInstance; /* Implement the primitive restart index */ - if (ctx->Array._PrimitiveRestart && ctx->Array._RestartIndex < count) { + if (ctx->Array.PrimitiveRestart && ctx->Array.RestartIndex < count) { GLuint primCount = 0; - if (ctx->Array._RestartIndex == start) { + if (ctx->Array.RestartIndex == start) { /* special case: RestartIndex at beginning */ if (count > 1) { prim[0].start = start + 1; @@ -588,7 +588,7 @@ vbo_draw_arrays(struct gl_context *ctx, GLenum mode, GLint start, primCount = 1; } } - else if (ctx->Array._RestartIndex == start + count - 1) { + else if (ctx->Array.RestartIndex == start + count - 1) { /* special case: RestartIndex at end */ if (count > 1) { prim[0].start = start; @@ -599,10 +599,10 @@ vbo_draw_arrays(struct gl_context *ctx, GLenum mode, GLint start, else { /* general case: RestartIndex in middle, split into two prims */ prim[0].start = start; - prim[0].count = ctx->Array._RestartIndex - start; + prim[0].count = ctx->Array.RestartIndex - start; prim[1] = prim[0]; - prim[1].start = ctx->Array._RestartIndex + 1; + prim[1].start = ctx->Array.RestartIndex + 1; prim[1].count = count - prim[1].start; primCount = 2; -- 2.30.2