1 files changed, 111 insertions, 0 deletions
diff --git a/src/gallium/drivers/r300/r300_query.c b/src/gallium/drivers/r300/r300_query.c
new file mode 100644
index 00000000000..5f5f4c4dbd4
--- /dev/null
+++ b/src/gallium/drivers/r300/r300_query.c
@@ -0,0 +1,111 @@
+/*
+ * Copyright 2009 Corbin Simpson <[email protected]>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE. */
+
+#include "r300_query.h"
+
+static struct pipe_query* r300_create_query(struct pipe_context* pipe,
+                                            unsigned query_type)
+{
+    struct r300_query* q = CALLOC_STRUCT(r300_query);
+
+    q->type = query_type;
+    assert(q->type == PIPE_QUERY_OCCLUSION_COUNTER);
+
+    /* XXX this is to force winsys to give us a GTT buffer */
+    q->buf = pipe->screen->buffer_create(pipe->screen, 64,
+            PIPE_BUFFER_USAGE_VERTEX, 64);
+
+    return (struct pipe_query*)q;
+}
+
+static void r300_destroy_query(struct pipe_context* pipe,
+                               struct pipe_query* query)
+{
+    FREE(query);
+}
+
+static void r300_begin_query(struct pipe_context* pipe,
+                             struct pipe_query* query)
+{
+    struct r300_context* r300 = r300_context(pipe);
+    struct r300_query* q = (struct r300_query*)query;
+    CS_LOCALS(r300);
+
+    uint32_t* map = pipe_buffer_map(pipe->screen, q->buf,
+            PIPE_BUFFER_USAGE_CPU_WRITE);
+    *map = ~0;
+    pipe_buffer_unmap(pipe->screen, q->buf);
+
+    BEGIN_CS(2);
+    OUT_CS_REG(R300_ZB_ZPASS_DATA, 0);
+    END_CS;
+}
+
+static void r300_end_query(struct pipe_context* pipe,
+                           struct pipe_query* query)
+{
+    struct r300_context* r300 = r300_context(pipe);
+    struct r300_query* q = (struct r300_query*)query;
+    CS_LOCALS(r300);
+
+    BEGIN_CS(4);
+    OUT_CS_REG_SEQ(R300_ZB_ZPASS_ADDR, 1);
+    OUT_CS_RELOC(q->buf, 0, 0, RADEON_GEM_DOMAIN_GTT, 0);
+    END_CS;
+}
+
+static boolean r300_get_query_result(struct pipe_context* pipe,
+                                     struct pipe_query* query,
+                                     boolean wait,
+                                     uint64_t* result)
+{
+    struct r300_query* q = (struct r300_query*)query;
+    uint32_t temp;
+
+    if (wait) {
+        /* Well, we're expected to just sit here and spin, so let's go ahead
+         * and flush so we can be sure that the card's spinning... */
+        /* XXX double-check these params */
+        pipe->flush(pipe, 0, NULL);
+    }
+
+    uint32_t* map = pipe_buffer_map(pipe->screen, q->buf,
+            PIPE_BUFFER_USAGE_CPU_READ);
+    temp = *map;
+    pipe_buffer_unmap(pipe->screen, q->buf);
+
+    if (temp < 0) {
+        /* Our results haven't been written yet... */
+        return FALSE;
+    }
+
+    *result = temp;
+    return TRUE;
+}
+
+void r300_init_query_functions(struct r300_context* r300) {
+    r300->context.create_query = r300_create_query;
+    r300->context.destroy_query = r300_destroy_query;
+    r300->context.begin_query = r300_begin_query;
+    r300->context.end_query = r300_end_query;
+    r300->context.get_query_result = r300_get_query_result;
+}