diff options
Diffstat (limited to 'src/mesa/shader')
| -rw-r--r-- | src/mesa/shader/slang/slang_link.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/mesa/shader/slang/slang_link.c b/src/mesa/shader/slang/slang_link.c index f79af0508f..1c21924f48 100644 --- a/src/mesa/shader/slang/slang_link.c +++ b/src/mesa/shader/slang/slang_link.c @@ -87,6 +87,31 @@ bits_agree(GLbitfield flags1, GLbitfield flags2, GLbitfield bit) /** + * Examine the outputs/varyings written by the vertex shader and + * append the names of those outputs onto the Varyings list. + * This will only capture the pre-defined/built-in varyings like + * gl_Position, not user-defined varyings. The later should already + * be in the varying vars list. + */ +static void +update_varying_var_list(GLcontext *ctx, struct gl_shader_program *shProg) +{ + if (shProg->VertexProgram) { + GLbitfield64 written = shProg->VertexProgram->Base.OutputsWritten; + GLuint i; + for (i = 0; written && i < VERT_RESULT_MAX; i++) { + if (written & BITFIELD64_BIT(i)) { + const char *name = _slang_vertex_output_name(i); + if (name) + _mesa_add_varying(shProg->Varying, name, 1, GL_FLOAT_VEC4, 0x0); + written &= ~BITFIELD64_BIT(i); + } + } + } +} + + +/** * Linking varying vars involves rearranging varying vars so that the * vertex program's output varyings matches the order of the fragment * program's input varyings. @@ -866,6 +891,8 @@ _slang_link(GLcontext *ctx, } } + /* Append built-in, used varyings to the varying var list */ + update_varying_var_list(ctx, shProg); if (fragProg && shProg->FragmentProgram) { /* Compute initial program's TexturesUsed info */ |