[Mesa-dev] [PATCH] glsl: serialize data from glTransformFeedbackVaryings

[Tapani Pälli]

While XFB has been enabled for cache, we did not serialize enough
data for the whole API to work (such as glGetProgramiv).

Fixes: 6d830940f7 "Allow shader cache usage with transform feedback"
Signed-off-by: Tapani Pälli <tapani.palli at intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=106907
---
 src/compiler/glsl/serialize.cpp | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/compiler/glsl/serialize.cpp b/src/compiler/glsl/serialize.cpp
index 727822633d..4cb74ddba9 100644
--- a/src/compiler/glsl/serialize.cpp
+++ b/src/compiler/glsl/serialize.cpp
@@ -323,6 +323,12 @@ write_xfb(struct blob *metadata, struct gl_shader_program *shProg)
 
    blob_write_uint32(metadata, prog->info.stage);
 
+   /* Data set by glTransformFeedbackVaryings. */
+   blob_write_uint32(metadata, shProg->TransformFeedback.BufferMode);
+   blob_write_uint32(metadata, shProg->TransformFeedback.NumVarying);
+   for (unsigned i = 0; i < shProg->TransformFeedback.NumVarying; i++)
+      blob_write_string(metadata, shProg->TransformFeedback.VaryingNames[i]);
+
    blob_write_uint32(metadata, ltf->NumOutputs);
    blob_write_uint32(metadata, ltf->ActiveBuffers);
    blob_write_uint32(metadata, ltf->NumVarying);
@@ -352,6 +358,15 @@ read_xfb(struct blob_reader *metadata, struct gl_shader_program *shProg)
    if (xfb_stage == ~0u)
       return;
 
+   /* Data set by glTransformFeedbackVaryings. */
+   shProg->TransformFeedback.BufferMode = blob_read_uint32(metadata);
+   shProg->TransformFeedback.NumVarying = blob_read_uint32(metadata);
+   shProg->TransformFeedback.VaryingNames = (char **)
+      malloc(shProg->TransformFeedback.NumVarying * sizeof(GLchar *));
+   for (unsigned i = 0; i < shProg->TransformFeedback.NumVarying; i++)
+      shProg->TransformFeedback.VaryingNames[i] =
+         strdup(blob_read_string(metadata));
+
    struct gl_program *prog = shProg->_LinkedShaders[xfb_stage]->Program;
    struct gl_transform_feedback_info *ltf =
       rzalloc(prog, struct gl_transform_feedback_info);
-- 
2.14.4