libstage: bump libstage for new render_func

Newer libstage enables the render_func to free its stage node via
return value.  This is useful for fire-and-forget style ephemeral
nodes that make for convenient autonomous stage nodes which
remove themselves after running their course.  Think bonus scores
and little visual effects...

Requires some mechanical changes to the existing render funcs,
but nothing functionally has really changed.

4 files changed, 9 insertions, 3 deletions

diff --git a/libstage b/libstage
-Subproject 19acc6de674d44d44f8d3bcb66568de3e5abfe3
+Subproject 55ce5773333b41229798c2a9b238812660707b7
diff --git a/src/clear-node.c b/src/clear-node.c
index 19093e4..688b8f3 100644
--- a/src/clear-node.c
+++ b/src/clear-node.c
@@ -23,9 +23,11 @@
 #include "macros.h"
 
 
-static void clear_node_render(const stage_t *stage, void *object, float alpha, void *render_ctxt)
+static stage_render_func_ret_t clear_node_render(const stage_t *stage, void *object, float alpha, void *render_ctxt)
 {
 	glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
+
+	return STAGE_RENDER_FUNC_RET_CONTINUE;
 }
 
 
diff --git a/src/shader-node.c b/src/shader-node.c
index 5a21c89..3f1cce1 100644
--- a/src/shader-node.c
+++ b/src/shader-node.c
@@ -60,7 +60,7 @@ static const float	texcoords[] = {
 };
 
 
-static void shader_node_render(const stage_t *stage, void *object, float alpha, void *render_ctxt)
+static stage_render_func_ret_t shader_node_render(const stage_t *stage, void *object, float alpha, void *render_ctxt)
 {
 	shader_node_t	*shader_node = object;
 	unsigned	n_uniforms;
@@ -93,6 +93,8 @@ static void shader_node_render(const stage_t *stage, void *object, float alpha,
 	glDrawArrays(GL_TRIANGLES, 0, 6);
 	glUseProgram(0);
 	glBindBuffer(GL_ARRAY_BUFFER, 0);
+
+	return STAGE_RENDER_FUNC_RET_CONTINUE;
 }
 
 
diff --git a/src/tex-node.c b/src/tex-node.c
index 1fd0ac0..3c144d3 100644
--- a/src/tex-node.c
+++ b/src/tex-node.c
@@ -38,7 +38,7 @@ typedef struct tex_node_t {
 
 
 /* Render simply renders a texd texture onto the screen */
-static void tex_node_render(const stage_t *stage, void *object, float alpha, void *render_ctxt)
+static stage_render_func_ret_t tex_node_render(const stage_t *stage, void *object, float alpha, void *render_ctxt)
 {
 	tex_node_t	*tex_node = object;
 
@@ -46,6 +46,8 @@ static void tex_node_render(const stage_t *stage, void *object, float alpha, voi
 	assert(tex_node);
 
 	tex_render(tex_node->tex, alpha, tex_node->projection_x, tex_node->model_x);
+
+	return STAGE_RENDER_FUNC_RET_CONTINUE;
 }