**************************************************************************/
/**
- * \brief Primitive rasterization/rendering (points, lines)
+ * Tiling engine.
*
- * \author Keith Whitwell <keith@tungstengraphics.com>
- * \author Brian Paul
+ * Builds per-tile display lists and executes them on calls to
+ * lp_setup_flush().
*/
-#include "lp_context.h"
-#include "lp_quad.h"
-#include "lp_quad_pipe.h"
-#include "lp_setup.h"
-#include "lp_state.h"
-#include "draw/draw_context.h"
-#include "draw/draw_private.h"
-#include "draw/draw_vertex.h"
-#include "pipe/p_shader_tokens.h"
-#include "pipe/p_thread.h"
-#include "util/u_math.h"
+#include "pipe/p_defines.h"
+#include "util/u_inlines.h"
#include "util/u_memory.h"
+#include "util/u_pack_color.h"
+#include "util/u_surface.h"
+#include "lp_scene.h"
+#include "lp_scene_queue.h"
+#include "lp_buffer.h"
+#include "lp_texture.h"
+#include "lp_debug.h"
+#include "lp_fence.h"
+#include "lp_rast.h"
+#include "lp_setup_context.h"
+#include "lp_screen.h"
+#include "state_tracker/sw_winsys.h"
+
+#include "draw/draw_context.h"
+#include "draw/draw_vbuf.h"
+
+
+static void set_scene_state( struct lp_setup_context *, unsigned );
+
+
+struct lp_scene *
+lp_setup_get_current_scene(struct lp_setup_context *setup)
+{
+ if (!setup->scene) {
+
+ /* wait for a free/empty scene
+ */
+ setup->scene = lp_scene_dequeue(setup->empty_scenes, TRUE);
+
+ assert(lp_scene_is_empty(setup->scene));
+
+ lp_scene_begin_binning(setup->scene,
+ &setup->fb );
+ }
+ return setup->scene;
+}
+
+
+static void
+first_triangle( struct lp_setup_context *setup,
+ const float (*v0)[4],
+ const float (*v1)[4],
+ const float (*v2)[4])
+{
+ set_scene_state( setup, SETUP_ACTIVE );
+ lp_setup_choose_triangle( setup );
+ setup->triangle( setup, v0, v1, v2 );
+}
+
+static void
+first_line( struct lp_setup_context *setup,
+ const float (*v0)[4],
+ const float (*v1)[4])
+{
+ set_scene_state( setup, SETUP_ACTIVE );
+ lp_setup_choose_line( setup );
+ setup->line( setup, v0, v1 );
+}
+
+static void
+first_point( struct lp_setup_context *setup,
+ const float (*v0)[4])
+{
+ set_scene_state( setup, SETUP_ACTIVE );
+ lp_setup_choose_point( setup );
+ setup->point( setup, v0 );
+}
+
+static void reset_context( struct lp_setup_context *setup )
+{
+ LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
+
+ /* Reset derived state */
+ setup->constants.stored_size = 0;
+ setup->constants.stored_data = NULL;
+ setup->fs.stored = NULL;
+ setup->dirty = ~0;
+
+ /* no current bin */
+ setup->scene = NULL;
+
+ /* Reset some state:
+ */
+ setup->clear.flags = 0;
+
+ /* Have an explicit "start-binning" call and get rid of this
+ * pointer twiddling?
+ */
+ setup->line = first_line;
+ setup->point = first_point;
+ setup->triangle = first_triangle;
+}
+
+
+/** Rasterize all scene's bins */
+static void
+lp_setup_rasterize_scene( struct lp_setup_context *setup,
+ boolean write_depth )
+{
+ struct lp_scene *scene = lp_setup_get_current_scene(setup);
+
+ lp_scene_rasterize(scene,
+ setup->rast,
+ write_depth);
+
+ reset_context( setup );
+
+ LP_DBG(DEBUG_SETUP, "%s done \n", __FUNCTION__);
+}
+
+
+
+static void
+begin_binning( struct lp_setup_context *setup )
+{
+ struct lp_scene *scene = lp_setup_get_current_scene(setup);
+
+ LP_DBG(DEBUG_SETUP, "%s color: %s depth: %s\n", __FUNCTION__,
+ (setup->clear.flags & PIPE_CLEAR_COLOR) ? "clear": "load",
+ (setup->clear.flags & PIPE_CLEAR_DEPTHSTENCIL) ? "clear": "load");
+
+ if (setup->fb.nr_cbufs) {
+ if (setup->clear.flags & PIPE_CLEAR_COLOR)
+ lp_scene_bin_everywhere( scene,
+ lp_rast_clear_color,
+ setup->clear.color );
+ else
+ lp_scene_bin_everywhere( scene,
+ lp_rast_load_color,
+ lp_rast_arg_null() );
+ }
+
+ if (setup->fb.zsbuf) {
+ if (setup->clear.flags & PIPE_CLEAR_DEPTHSTENCIL)
+ lp_scene_bin_everywhere( scene,
+ lp_rast_clear_zstencil,
+ setup->clear.zstencil );
+ }
+
+ LP_DBG(DEBUG_SETUP, "%s done\n", __FUNCTION__);
+}
+
+
+/* This basically bins and then flushes any outstanding full-screen
+ * clears.
+ *
+ * TODO: fast path for fullscreen clears and no triangles.
+ */
+static void
+execute_clears( struct lp_setup_context *setup )
+{
+ LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
+
+ begin_binning( setup );
+ lp_setup_rasterize_scene( setup, TRUE );
+}
-#define DEBUG_VERTS 0
+static void
+set_scene_state( struct lp_setup_context *setup,
+ unsigned new_state )
+{
+ unsigned old_state = setup->state;
+
+ if (old_state == new_state)
+ return;
+
+ LP_DBG(DEBUG_SETUP, "%s old %d new %d\n", __FUNCTION__, old_state, new_state);
+
+ switch (new_state) {
+ case SETUP_ACTIVE:
+ begin_binning( setup );
+ break;
+
+ case SETUP_CLEARED:
+ if (old_state == SETUP_ACTIVE) {
+ assert(0);
+ return;
+ }
+ break;
+
+ case SETUP_FLUSHED:
+ if (old_state == SETUP_CLEARED)
+ execute_clears( setup );
+ else
+ lp_setup_rasterize_scene( setup, TRUE );
+ break;
+ }
+
+ setup->state = new_state;
+}
void
-llvmpipe_setup_flush()
+lp_setup_flush( struct lp_setup_context *setup,
+ unsigned flags )
{
+ LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
+
+ set_scene_state( setup, SETUP_FLUSHED );
}
+
void
-llvmpipe_setup_bind_framebuffer()
+lp_setup_bind_framebuffer( struct lp_setup_context *setup,
+ const struct pipe_framebuffer_state *fb )
{
+ LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
+
+ /* Flush any old scene.
+ */
+ set_scene_state( setup, SETUP_FLUSHED );
+
+ /* Set new state. This will be picked up later when we next need a
+ * scene.
+ */
+ util_copy_framebuffer_state(&setup->fb, fb);
}
+
void
-llvmpipe_setup_clear()
+lp_setup_clear( struct lp_setup_context *setup,
+ const float *color,
+ double depth,
+ unsigned stencil,
+ unsigned flags )
{
+ struct lp_scene *scene = lp_setup_get_current_scene(setup);
+ unsigned i;
+
+ LP_DBG(DEBUG_SETUP, "%s state %d\n", __FUNCTION__, setup->state);
+
+
+ if (flags & PIPE_CLEAR_COLOR) {
+ for (i = 0; i < 4; ++i)
+ setup->clear.color.clear_color[i] = float_to_ubyte(color[i]);
+ }
+
+ if (flags & PIPE_CLEAR_DEPTHSTENCIL) {
+ setup->clear.zstencil.clear_zstencil =
+ util_pack_z_stencil(setup->fb.zsbuf->format,
+ depth,
+ stencil);
+ }
+
+ if (setup->state == SETUP_ACTIVE) {
+ /* Add the clear to existing scene. In the unusual case where
+ * both color and depth-stencil are being cleared when there's
+ * already been some rendering, we could discard the currently
+ * binned scene and start again, but I don't see that as being
+ * a common usage.
+ */
+ if (flags & PIPE_CLEAR_COLOR)
+ lp_scene_bin_everywhere( scene,
+ lp_rast_clear_color,
+ setup->clear.color );
+
+ if (setup->clear.flags & PIPE_CLEAR_DEPTHSTENCIL)
+ lp_scene_bin_everywhere( scene,
+ lp_rast_clear_zstencil,
+ setup->clear.zstencil );
+ }
+ else {
+ /* Put ourselves into the 'pre-clear' state, specifically to try
+ * and accumulate multiple clears to color and depth_stencil
+ * buffers which the app or state-tracker might issue
+ * separately.
+ */
+ set_scene_state( setup, SETUP_CLEARED );
+
+ setup->clear.flags |= flags;
+ }
}
-/* Stubs for lines & points for now:
+/**
+ * Emit a fence.
*/
+struct pipe_fence_handle *
+lp_setup_fence( struct lp_setup_context *setup )
+{
+ struct lp_scene *scene = lp_setup_get_current_scene(setup);
+ const unsigned rank = lp_scene_get_num_bins( scene ); /* xxx */
+ struct lp_fence *fence = lp_fence_create(rank);
+
+ LP_DBG(DEBUG_SETUP, "%s rank %u\n", __FUNCTION__, rank);
+
+ set_scene_state( setup, SETUP_ACTIVE );
+
+ /* insert the fence into all command bins */
+ lp_scene_bin_everywhere( scene,
+ lp_rast_fence,
+ lp_rast_arg_fence(fence) );
+
+ return (struct pipe_fence_handle *) fence;
+}
+
+
+void
+lp_setup_set_triangle_state( struct lp_setup_context *setup,
+ unsigned cull_mode,
+ boolean ccw_is_frontface,
+ boolean scissor,
+ boolean gl_rasterization_rules)
+{
+ LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
+
+ setup->ccw_is_frontface = ccw_is_frontface;
+ setup->cullmode = cull_mode;
+ setup->triangle = first_triangle;
+ setup->scissor_test = scissor;
+ setup->pixel_offset = gl_rasterization_rules ? 0.5f : 0.0f;
+}
+
+
+
void
-llvmpipe_setup_point(struct setup_context *setup,
- const float (*v0)[4])
+lp_setup_set_fs_inputs( struct lp_setup_context *setup,
+ const struct lp_shader_input *input,
+ unsigned nr )
{
+ LP_DBG(DEBUG_SETUP, "%s %p %u\n", __FUNCTION__, (void *) input, nr);
+
+ memcpy( setup->fs.input, input, nr * sizeof input[0] );
+ setup->fs.nr_inputs = nr;
}
void
-llvmpipe_setup_line(struct setup_context *setup,
- const float (*v0)[4],
- const float (*v1)[4])
+lp_setup_set_fs_functions( struct lp_setup_context *setup,
+ lp_jit_frag_func jit_function0,
+ lp_jit_frag_func jit_function1,
+ boolean opaque )
{
+ LP_DBG(DEBUG_SETUP, "%s %p\n", __FUNCTION__, (void *) jit_function0);
+ /* FIXME: reference count */
+
+ setup->fs.current.jit_function[0] = jit_function0;
+ setup->fs.current.jit_function[1] = jit_function1;
+ setup->fs.current.opaque = opaque;
+ setup->dirty |= LP_SETUP_NEW_FS;
}
+void
+lp_setup_set_fs_constants(struct lp_setup_context *setup,
+ struct pipe_buffer *buffer)
+{
+ LP_DBG(DEBUG_SETUP, "%s %p\n", __FUNCTION__, (void *) buffer);
-/* Called after statechange, before emitting primitives. If binning
- * is active, this function should store relevant state in the binning
- * context.
- *
- * That includes:
- * - current fragment shader function
- * - bound constant buffer contents
- * - bound textures
- * - blend color
- * - etc.
- *
- * Basically everything needed at some point in the future to
- * rasterize triangles for the current state.
- *
- * Additionally this will set up the state needed for the rasterizer
- * to process and bin incoming triangles. That would include such
- * things as:
- * - cull mode
- * - ???
- * - etc.
- *
+ pipe_buffer_reference(&setup->constants.current, buffer);
+
+ setup->dirty |= LP_SETUP_NEW_CONSTANTS;
+}
+
+
+void
+lp_setup_set_alpha_ref_value( struct lp_setup_context *setup,
+ float alpha_ref_value )
+{
+ LP_DBG(DEBUG_SETUP, "%s %f\n", __FUNCTION__, alpha_ref_value);
+
+ if(setup->fs.current.jit_context.alpha_ref_value != alpha_ref_value) {
+ setup->fs.current.jit_context.alpha_ref_value = alpha_ref_value;
+ setup->dirty |= LP_SETUP_NEW_FS;
+ }
+}
+
+void
+lp_setup_set_blend_color( struct lp_setup_context *setup,
+ const struct pipe_blend_color *blend_color )
+{
+ LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
+
+ assert(blend_color);
+
+ if(memcmp(&setup->blend_color.current, blend_color, sizeof *blend_color) != 0) {
+ memcpy(&setup->blend_color.current, blend_color, sizeof *blend_color);
+ setup->dirty |= LP_SETUP_NEW_BLEND_COLOR;
+ }
+}
+
+
+void
+lp_setup_set_scissor( struct lp_setup_context *setup,
+ const struct pipe_scissor_state *scissor )
+{
+ LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
+
+ assert(scissor);
+
+ if (memcmp(&setup->scissor.current, scissor, sizeof(*scissor)) != 0) {
+ setup->scissor.current = *scissor; /* struct copy */
+ setup->dirty |= LP_SETUP_NEW_SCISSOR;
+ }
+}
+
+
+void
+lp_setup_set_flatshade_first( struct lp_setup_context *setup,
+ boolean flatshade_first )
+{
+ setup->flatshade_first = flatshade_first;
+}
+
+
+void
+lp_setup_set_vertex_info( struct lp_setup_context *setup,
+ struct vertex_info *vertex_info )
+{
+ /* XXX: just silently holding onto the pointer:
+ */
+ setup->vertex_info = vertex_info;
+}
+
+
+/**
+ * Called during state validation when LP_NEW_SAMPLER_VIEW is set.
*/
-void setup_prepare( struct setup_context *setup )
+void
+lp_setup_set_fragment_sampler_views(struct lp_setup_context *setup,
+ unsigned num,
+ struct pipe_sampler_view **views)
{
- struct llvmpipe_context *lp = setup->llvmpipe;
+ unsigned i;
+
+ LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
+
+ assert(num <= PIPE_MAX_SAMPLERS);
+
+ for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
+ struct pipe_sampler_view *view = i < num ? views[i] : NULL;
+
+ if(view) {
+ struct pipe_texture *tex = view->texture;
+ struct llvmpipe_texture *lp_tex = llvmpipe_texture(tex);
+ struct lp_jit_texture *jit_tex;
+ jit_tex = &setup->fs.current.jit_context.textures[i];
+ jit_tex->width = tex->width0;
+ jit_tex->height = tex->height0;
+ jit_tex->depth = tex->depth0;
+ jit_tex->last_level = tex->last_level;
+ if (!lp_tex->dt) {
+ /* regular texture - setup array of mipmap level pointers */
+ int j;
+ for (j = 0; j <= tex->last_level; j++) {
+ jit_tex->data[j] =
+ (ubyte *) lp_tex->data + lp_tex->level_offset[j];
+ jit_tex->row_stride[j] = lp_tex->stride[j];
+ }
+ }
+ else {
+ /* display target texture/surface */
+ /*
+ * XXX: Where should this be unmapped?
+ */
- if (lp->dirty) {
- llvmpipe_update_derived(lp);
+ struct llvmpipe_screen *screen = llvmpipe_screen(tex->screen);
+ struct sw_winsys *winsys = screen->winsys;
+ jit_tex->data[0] = winsys->displaytarget_map(winsys, lp_tex->dt,
+ PIPE_BUFFER_USAGE_CPU_READ);
+ jit_tex->row_stride[0] = lp_tex->stride[0];
+ assert(jit_tex->data[0]);
+ }
+
+ /* the scene references this texture */
+ {
+ struct lp_scene *scene = lp_setup_get_current_scene(setup);
+ lp_scene_texture_reference(scene, tex);
+ }
+ }
}
- lp->quad.first->begin( lp->quad.first );
+ setup->dirty |= LP_SETUP_NEW_FS;
+}
+
- if (lp->reduced_api_prim == PIPE_PRIM_TRIANGLES &&
- lp->rasterizer->fill_cw == PIPE_POLYGON_MODE_FILL &&
- lp->rasterizer->fill_ccw == PIPE_POLYGON_MODE_FILL) {
- /* we'll do culling */
- setup->winding = lp->rasterizer->cull_mode;
+/**
+ * Is the given texture referenced by any scene?
+ * Note: we have to check all scenes including any scenes currently
+ * being rendered and the current scene being built.
+ */
+unsigned
+lp_setup_is_texture_referenced( const struct lp_setup_context *setup,
+ const struct pipe_texture *texture )
+{
+ unsigned i;
+
+ /* check the render targets */
+ for (i = 0; i < setup->fb.nr_cbufs; i++) {
+ if (setup->fb.cbufs[i]->texture == texture)
+ return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
}
- else {
- /* 'draw' will do culling */
- setup->winding = PIPE_WINDING_NONE;
+ if (setup->fb.zsbuf && setup->fb.zsbuf->texture == texture) {
+ return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
+ }
+
+ /* check textures referenced by the scene */
+ for (i = 0; i < Elements(setup->scenes); i++) {
+ if (lp_scene_is_texture_referenced(setup->scenes[i], texture)) {
+ return PIPE_REFERENCED_FOR_READ;
+ }
}
- setup_prepare_tri( setup->llvmpipe );
+ return PIPE_UNREFERENCED;
}
+/**
+ * Called by vbuf code when we're about to draw something.
+ */
+void
+lp_setup_update_state( struct lp_setup_context *setup )
+{
+ struct lp_scene *scene = lp_setup_get_current_scene(setup);
+
+ LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
+
+ assert(setup->fs.current.jit_function);
+
+ if(setup->dirty & LP_SETUP_NEW_BLEND_COLOR) {
+ uint8_t *stored;
+ unsigned i, j;
+
+ stored = lp_scene_alloc_aligned(scene, 4 * 16, 16);
+
+ /* smear each blend color component across 16 ubyte elements */
+ for (i = 0; i < 4; ++i) {
+ uint8_t c = float_to_ubyte(setup->blend_color.current.color[i]);
+ for (j = 0; j < 16; ++j)
+ stored[i*16 + j] = c;
+ }
+
+ setup->blend_color.stored = stored;
+
+ setup->fs.current.jit_context.blend_color = setup->blend_color.stored;
+ setup->dirty |= LP_SETUP_NEW_FS;
+ }
+
+ if (setup->dirty & LP_SETUP_NEW_SCISSOR) {
+ float *stored;
+
+ stored = lp_scene_alloc_aligned(scene, 4 * sizeof(int32_t), 16);
+
+ stored[0] = (float) setup->scissor.current.minx;
+ stored[1] = (float) setup->scissor.current.miny;
+ stored[2] = (float) setup->scissor.current.maxx;
+ stored[3] = (float) setup->scissor.current.maxy;
+
+ setup->scissor.stored = stored;
+
+ setup->fs.current.jit_context.scissor_xmin = stored[0];
+ setup->fs.current.jit_context.scissor_ymin = stored[1];
+ setup->fs.current.jit_context.scissor_xmax = stored[2];
+ setup->fs.current.jit_context.scissor_ymax = stored[3];
+
+ setup->dirty |= LP_SETUP_NEW_FS;
+ }
+
+ if(setup->dirty & LP_SETUP_NEW_CONSTANTS) {
+ struct pipe_buffer *buffer = setup->constants.current;
+
+ if(buffer) {
+ unsigned current_size = buffer->size;
+ const void *current_data = llvmpipe_buffer(buffer)->data;
+
+ /* TODO: copy only the actually used constants? */
+
+ if(setup->constants.stored_size != current_size ||
+ !setup->constants.stored_data ||
+ memcmp(setup->constants.stored_data,
+ current_data,
+ current_size) != 0) {
+ void *stored;
+
+ stored = lp_scene_alloc(scene, current_size);
+ if(stored) {
+ memcpy(stored,
+ current_data,
+ current_size);
+ setup->constants.stored_size = current_size;
+ setup->constants.stored_data = stored;
+ }
+ }
+ }
+ else {
+ setup->constants.stored_size = 0;
+ setup->constants.stored_data = NULL;
+ }
+
+ setup->fs.current.jit_context.constants = setup->constants.stored_data;
+ setup->dirty |= LP_SETUP_NEW_FS;
+ }
+
+
+ if(setup->dirty & LP_SETUP_NEW_FS) {
+ if(!setup->fs.stored ||
+ memcmp(setup->fs.stored,
+ &setup->fs.current,
+ sizeof setup->fs.current) != 0) {
+ /* The fs state that's been stored in the scene is different from
+ * the new, current state. So allocate a new lp_rast_state object
+ * and append it to the bin's setup data buffer.
+ */
+ struct lp_rast_state *stored =
+ (struct lp_rast_state *) lp_scene_alloc(scene, sizeof *stored);
+ if(stored) {
+ memcpy(stored,
+ &setup->fs.current,
+ sizeof setup->fs.current);
+ setup->fs.stored = stored;
-void setup_destroy_context( struct setup_context *setup )
+ /* put the state-set command into all bins */
+ lp_scene_bin_state_command( scene,
+ lp_rast_set_state,
+ lp_rast_arg_state(setup->fs.stored) );
+ }
+ }
+ }
+
+ setup->dirty = 0;
+
+ assert(setup->fs.stored);
+}
+
+
+
+/* Only caller is lp_setup_vbuf_destroy()
+ */
+void
+lp_setup_destroy( struct lp_setup_context *setup )
{
+ reset_context( setup );
+
+ pipe_buffer_reference(&setup->constants.current, NULL);
+
+ /* free the scenes in the 'empty' queue */
+ while (1) {
+ struct lp_scene *scene = lp_scene_dequeue(setup->empty_scenes, FALSE);
+ if (!scene)
+ break;
+ lp_scene_destroy(scene);
+ }
+
+ lp_rast_destroy( setup->rast );
+
FREE( setup );
}
/**
- * Create a new primitive setup/render stage.
+ * Create a new primitive tiling engine. Plug it into the backend of
+ * the draw module. Currently also creates a rasterizer to use with
+ * it.
*/
-struct setup_context *setup_create_context( struct llvmpipe_context *llvmpipe )
+struct lp_setup_context *
+lp_setup_create( struct pipe_context *pipe,
+ struct draw_context *draw )
{
- struct setup_context *setup = CALLOC_STRUCT(setup_context);
unsigned i;
+ struct lp_setup_context *setup = CALLOC_STRUCT(lp_setup_context);
- setup->llvmpipe = llvmpipe;
+ if (!setup)
+ return NULL;
+
+ lp_setup_init_vbuf(setup);
+
+ setup->empty_scenes = lp_scene_queue_create();
+ if (!setup->empty_scenes)
+ goto fail;
+
+ /* XXX: move this to the screen and share between contexts:
+ */
+ setup->rast = lp_rast_create();
+ if (!setup->rast)
+ goto fail;
+
+ setup->vbuf = draw_vbuf_stage(draw, &setup->base);
+ if (!setup->vbuf)
+ goto fail;
+
+ draw_set_rasterize_stage(draw, setup->vbuf);
+ draw_set_render(draw, &setup->base);
+
+ /* create some empty scenes */
+ for (i = 0; i < MAX_SCENES; i++) {
+ setup->scenes[i] = lp_scene_create( pipe, setup->empty_scenes );
+
+ lp_scene_enqueue(setup->empty_scenes, setup->scenes[i]);
+ }
+
+ setup->triangle = first_triangle;
+ setup->line = first_line;
+ setup->point = first_point;
+
+ setup->dirty = ~0;
return setup;
+
+fail:
+ if (setup->rast)
+ lp_rast_destroy( setup->rast );
+
+ if (setup->vbuf)
+ ;
+
+ if (setup->empty_scenes)
+ lp_scene_queue_destroy(setup->empty_scenes);
+
+ FREE(setup);
+ return NULL;
}