}
}
+#define UPDATE_MIN2(a, b) (a) = MIN2((a), (b))
+#define UPDATE_MAX2(a, b) (a) = MAX2((a), (b))
+
+/**
+ * \see find_sub_primitives() from core mesa
+ */
+static int
+ilo_find_sub_primitives(const void *elements, unsigned element_size,
+ const struct pipe_draw_info *orig_info,
+ struct pipe_draw_info *info)
+{
+ const unsigned max_prims = orig_info->count - orig_info->start;
+ unsigned i, cur_start, cur_count;
+ int scan_index;
+ unsigned scan_num;
+
+ cur_start = orig_info->start;
+ cur_count = 0;
+ scan_num = 0;
+
+#define IB_INDEX_READ(TYPE, INDEX) (((const TYPE *) elements)[INDEX])
+
+#define SCAN_ELEMENTS(TYPE) \
+ info[scan_num] = *orig_info; \
+ info[scan_num].primitive_restart = false; \
+ for (i = orig_info->start; i < orig_info->count; i++) { \
+ scan_index = IB_INDEX_READ(TYPE, i); \
+ if (scan_index == orig_info->restart_index) { \
+ if (cur_count > 0) { \
+ assert(scan_num < max_prims); \
+ info[scan_num].start = cur_start; \
+ info[scan_num].count = cur_count; \
+ scan_num++; \
+ info[scan_num] = *orig_info; \
+ info[scan_num].primitive_restart = false; \
+ } \
+ cur_start = i + 1; \
+ cur_count = 0; \
+ } \
+ else { \
+ UPDATE_MIN2(info[scan_num].min_index, scan_index); \
+ UPDATE_MAX2(info[scan_num].max_index, scan_index); \
+ cur_count++; \
+ } \
+ } \
+ if (cur_count > 0) { \
+ assert(scan_num < max_prims); \
+ info[scan_num].start = cur_start; \
+ info[scan_num].count = cur_count; \
+ scan_num++; \
+ }
+
+ switch (element_size) {
+ case 1:
+ SCAN_ELEMENTS(uint8_t);
+ break;
+ case 2:
+ SCAN_ELEMENTS(uint16_t);
+ break;
+ case 4:
+ SCAN_ELEMENTS(uint32_t);
+ break;
+ default:
+ assert(0 && "bad index_size in find_sub_primitives()");
+ }
+
+#undef SCAN_ELEMENTS
+
+ return scan_num;
+}
+
+static inline bool
+ilo_check_restart_index(struct ilo_context *ilo,
+ const struct pipe_draw_info *info)
+{
+ /*
+ * Haswell (GEN(7.5)) supports an arbitrary cut index, check everything
+ * older.
+ */
+ if (ilo->dev->gen >= ILO_GEN(7.5))
+ return true;
+
+ /* Note: indices must be unsigned byte, unsigned short or unsigned int */
+ switch (ilo->index_buffer.index_size) {
+ case 1:
+ return ((info->restart_index & 0xff) == 0xff);
+ break;
+ case 2:
+ return ((info->restart_index & 0xffff) == 0xffff);
+ break;
+ case 4:
+ return (info->restart_index == 0xffffffff);
+ break;
+ }
+ return false;
+}
+
+static inline bool
+ilo_check_restart_prim_type(struct ilo_context *ilo,
+ const struct pipe_draw_info *info)
+{
+ switch (info->mode) {
+ case PIPE_PRIM_POINTS:
+ case PIPE_PRIM_LINES:
+ case PIPE_PRIM_LINE_STRIP:
+ case PIPE_PRIM_TRIANGLES:
+ case PIPE_PRIM_TRIANGLE_STRIP:
+ /* All 965 GEN graphics support a cut index for these primitive types */
+ return true;
+ break;
+
+ case PIPE_PRIM_LINE_LOOP:
+ case PIPE_PRIM_POLYGON:
+ case PIPE_PRIM_QUAD_STRIP:
+ case PIPE_PRIM_QUADS:
+ case PIPE_PRIM_TRIANGLE_FAN:
+ if (ilo->dev->gen >= ILO_GEN(7.5)) {
+ /* Haswell and newer parts can handle these prim types. */
+ return true;
+ }
+ break;
+ }
+
+ return false;
+}
+
+/*
+ * Handle VBOs using primitive restart.
+ * Verify that restart index and primitive type can be handled by the HW.
+ * Return true if this routine did the rendering
+ * Return false if this routine did NOT render because restart can be handled
+ * in HW.
+ */
+static void
+ilo_draw_vbo_with_sw_restart(struct pipe_context *pipe,
+ const struct pipe_draw_info *info)
+{
+ struct ilo_context *ilo = ilo_context(pipe);
+ struct pipe_draw_info *restart_info = NULL;
+ int sub_prim_count = 1;
+
+ /*
+ * We have to break up the primitive into chunks manually
+ * Worst case, every other index could be a restart index so
+ * need to have space for that many primitives
+ */
+ restart_info = MALLOC(((info->count + 1) / 2) * sizeof(*info));
+ if (NULL == restart_info) {
+ /* If we can't get memory for this, bail out */
+ ilo_err("%s:%d - Out of memory", __FILE__, __LINE__);
+ return;
+ }
+
+ struct pipe_transfer *transfer = NULL;
+ const void *map = NULL;
+ map = pipe_buffer_map(pipe,
+ ilo->index_buffer.buffer,
+ PIPE_TRANSFER_READ,
+ &transfer);
+
+ sub_prim_count = ilo_find_sub_primitives(map + ilo->index_buffer.offset,
+ ilo->index_buffer.index_size,
+ info,
+ restart_info);
+
+ pipe_buffer_unmap(pipe, transfer);
+
+ info = restart_info;
+
+ while (sub_prim_count > 0) {
+ pipe->draw_vbo(pipe, info);
+
+ sub_prim_count--;
+ info++;
+ }
+
+ FREE(restart_info);
+}
+
static void
ilo_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
{
if (!pass_render_condition(hw3d, pipe))
return;
+ if (info->primitive_restart && info->indexed) {
+ /*
+ * Want to draw an indexed primitive using primitive restart
+ * Check that HW can handle the request and fall to SW if not.
+ */
+ if (!ilo_check_restart_index(ilo, info) ||
+ !ilo_check_restart_prim_type(ilo, info)) {
+ ilo_draw_vbo_with_sw_restart(pipe, info);
+ return;
+ }
+ }
+
/* assume the cache is still in use by the previous batch */
if (hw3d->new_batch)
ilo_shader_cache_mark_busy(ilo->shader_cache);
*/
ilo->dirty |= ILO_DIRTY_VERTEX_BUFFERS | ILO_DIRTY_INDEX_BUFFER;
+ /* If draw_vbo ever fails, return immediately. */
if (!draw_vbo(hw3d, ilo, info, &prim_generated, &prim_emitted))
return;
projects / mesa.git / commitdiff