/**
* Callback for deleting shader and shader programs objects.
* Called by _mesa_HashDeleteAll().
*/
static void
delete_shader_cb(GLuint id, void *data, void *userData)
{
GLcontext *ctx = (GLcontext *) userData;
struct gl_shader *sh = (struct gl_shader *) data;
if (sh->Type == GL_FRAGMENT_SHADER || sh->Type == GL_VERTEX_SHADER) {
_mesa_free_shader(ctx, sh);
}
else {
struct gl_shader_program *shProg = (struct gl_shader_program *) data;
ASSERT(shProg->Type == GL_SHADER_PROGRAM_MESA);
_mesa_free_shader_program(ctx, shProg);
}
}
/**
* Search the shader program's list of shaders to find the one that
* defines main().
* This will involve shader concatenation and recompilation if needed.
*/
static struct gl_shader *
get_main_shader(GLcontext *ctx,
struct gl_shader_program *shProg, GLenum type)
{
struct gl_shader *shader = NULL;
GLuint i;
/*
* Look for a shader that defines main() and has no unresolved references.
*/
for (i = 0; i < shProg->NumShaders; i++) {
shader = shProg->Shaders[i];
if (shader->Type == type &&
shader->Main &&
!shader->UnresolvedRefs) {
/* All set! */
return shader;
}
}
/*
* There must have been unresolved references during the original
* compilation. Try concatenating all the shaders of the given type
* and recompile that.
*/
shader = concat_shaders(shProg, type);
if (shader) {
_slang_compile(ctx, shader);
/* Finally, check if recompiling failed */
if (!shader->CompileStatus ||
!shader->Main ||
shader->UnresolvedRefs) {
link_error(shProg, "Unresolved symbols");
_mesa_free_shader(ctx, shader);
return NULL;
}
}
return shader;
}
/* XXX this could be static */
void
_mesa_reference_shader(GLcontext *ctx, struct gl_shader **ptr,
struct gl_shader *sh)
{
assert(ptr);
if (*ptr == sh) {
/* no-op */
return;
}
if (*ptr) {
/* Unreference the old shader */
GLboolean deleteFlag = GL_FALSE;
struct gl_shader *old = *ptr;
ASSERT(old->RefCount > 0);
old->RefCount--;
/*printf("SHADER DECR %p (%d) to %d\n",
(void*) old, old->Name, old->RefCount);*/
deleteFlag = (old->RefCount == 0);
if (deleteFlag) {
_mesa_HashRemove(ctx->Shared->ShaderObjects, old->Name);
_mesa_free_shader(ctx, old);
}
*ptr = NULL;
}
assert(!*ptr);
if (sh) {
/* reference new */
sh->RefCount++;
/*printf("SHADER INCR %p (%d) to %d\n",
(void*) sh, sh->Name, sh->RefCount);*/
*ptr = sh;
}
}
