From: Paul Berry Date: Thu, 29 Dec 2011 23:55:01 +0000 (-0800) Subject: mesa: Check that all buffers are bound in BeginTransformFeedback. X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=ebfad9f6a125738b9bfc5d5f7d09a8b57856674a;p=mesa.git mesa: Check that all buffers are bound in BeginTransformFeedback. From the EXT_transform_feedback spec: The error INVALID_OPERATION is generated by BeginTransformFeedbackEXT if any transform feedback buffer object binding point used in transform feedback mode does not have a buffer object bound. This required adding a new NumBuffers field to the gl_transform_feedback_info struct, to keep track of how many transform feedback buffers are required by the current program. Fixes Piglit tests: - EXT_transform_feedback/api-errors interleaved_unbound - EXT_transform_feedback/api-errors separate_unbound_0_1 - EXT_transform_feedback/api-errors separate_unbound_0_2 - EXT_transform_feedback/api-errors separate_unbound_1_2 Reviewed-by: Brian Paul Reviewed-by: Ian Romanick Reviewed-by: Eric Anholt --- diff --git a/src/glsl/linker.cpp b/src/glsl/linker.cpp index 65870087bf5..9e8975e887f 100644 --- a/src/glsl/linker.cpp +++ b/src/glsl/linker.cpp @@ -1865,11 +1865,14 @@ store_tfeedback_info(struct gl_context *ctx, struct gl_shader_program *prog, tfeedback_decl *tfeedback_decls) { unsigned total_tfeedback_components = 0; + bool separate_attribs_mode = + prog->TransformFeedback.BufferMode == GL_SEPARATE_ATTRIBS; memset(&prog->LinkedTransformFeedback, 0, sizeof(prog->LinkedTransformFeedback)); + prog->LinkedTransformFeedback.NumBuffers = + separate_attribs_mode ? num_tfeedback_decls : 1; for (unsigned i = 0; i < num_tfeedback_decls; ++i) { - unsigned buffer = - prog->TransformFeedback.BufferMode == GL_SEPARATE_ATTRIBS ? i : 0; + unsigned buffer = separate_attribs_mode ? i : 0; if (!tfeedback_decls[i].store(prog, &prog->LinkedTransformFeedback, buffer)) return false; diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h index 107371e5299..35458e396ad 100644 --- a/src/mesa/main/mtypes.h +++ b/src/mesa/main/mtypes.h @@ -1821,6 +1821,11 @@ struct gl_uniform_list; struct gl_transform_feedback_info { unsigned NumOutputs; + /** + * Number of transform feedback buffers in use by this program. + */ + unsigned NumBuffers; + struct { unsigned OutputRegister; unsigned OutputBuffer; diff --git a/src/mesa/main/transformfeedback.c b/src/mesa/main/transformfeedback.c index 305589df75a..6e93b3b49d1 100644 --- a/src/mesa/main/transformfeedback.c +++ b/src/mesa/main/transformfeedback.c @@ -342,9 +342,12 @@ void GLAPIENTRY _mesa_BeginTransformFeedback(GLenum mode) { struct gl_transform_feedback_object *obj; + struct gl_transform_feedback_info *info; + int i; GET_CURRENT_CONTEXT(ctx); obj = ctx->TransformFeedback.CurrentObject; + info = &ctx->Shader.CurrentVertexProgram->LinkedTransformFeedback; switch (mode) { case GL_POINTS: @@ -363,6 +366,15 @@ _mesa_BeginTransformFeedback(GLenum mode) return; } + for (i = 0; i < info->NumBuffers; ++i) { + if (obj->BufferNames[i] == 0) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glBeginTransformFeedback(binding point %d does not have " + "a buffer object bound)", i); + return; + } + } + FLUSH_VERTICES(ctx, _NEW_TRANSFORM_FEEDBACK); obj->Active = GL_TRUE; ctx->TransformFeedback.Mode = mode;