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Diffstat (limited to 'src/gallium/drivers/svga/svga_draw_arrays.c')
-rw-r--r--src/gallium/drivers/svga/svga_draw_arrays.c297
1 files changed, 297 insertions, 0 deletions
diff --git a/src/gallium/drivers/svga/svga_draw_arrays.c b/src/gallium/drivers/svga/svga_draw_arrays.c
new file mode 100644
index 00000000000..75492dffca2
--- /dev/null
+++ b/src/gallium/drivers/svga/svga_draw_arrays.c
@@ -0,0 +1,297 @@
+/**********************************************************
+ * Copyright 2008-2009 VMware, Inc. All rights reserved.
+ *
+ * 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 the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, 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 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
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * 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 "svga_cmd.h"
+
+#include "pipe/p_inlines.h"
+#include "util/u_prim.h"
+#include "indices/u_indices.h"
+
+#include "svga_hw_reg.h"
+#include "svga_draw.h"
+#include "svga_draw_private.h"
+#include "svga_context.h"
+
+
+#define DBG 0
+
+
+
+
+static enum pipe_error generate_indices( struct svga_hwtnl *hwtnl,
+ unsigned nr,
+ unsigned index_size,
+ u_generate_func generate,
+ struct pipe_buffer **out_buf )
+{
+ struct pipe_screen *screen = hwtnl->svga->pipe.screen;
+ unsigned size = index_size * nr;
+ struct pipe_buffer *dst = NULL;
+ void *dst_map = NULL;
+
+ dst = screen->buffer_create( screen, 32,
+ PIPE_BUFFER_USAGE_INDEX |
+ PIPE_BUFFER_USAGE_CPU_WRITE |
+ PIPE_BUFFER_USAGE_GPU_READ,
+ size );
+ if (dst == NULL)
+ goto fail;
+
+ dst_map = pipe_buffer_map( screen, dst, PIPE_BUFFER_USAGE_CPU_WRITE );
+ if (dst_map == NULL)
+ goto fail;
+
+ generate( nr,
+ dst_map );
+
+ pipe_buffer_unmap( screen, dst );
+
+ *out_buf = dst;
+ return PIPE_OK;
+
+fail:
+ if (dst_map)
+ screen->buffer_unmap( screen, dst );
+
+ if (dst)
+ screen->buffer_destroy( dst );
+
+ return PIPE_ERROR_OUT_OF_MEMORY;
+}
+
+static boolean compare( unsigned cached_nr,
+ unsigned nr,
+ unsigned type )
+{
+ if (type == U_GENERATE_REUSABLE)
+ return cached_nr >= nr;
+ else
+ return cached_nr == nr;
+}
+
+static enum pipe_error retrieve_or_generate_indices( struct svga_hwtnl *hwtnl,
+ unsigned prim,
+ unsigned gen_type,
+ unsigned gen_nr,
+ unsigned gen_size,
+ u_generate_func generate,
+ struct pipe_buffer **out_buf )
+{
+ enum pipe_error ret = PIPE_OK;
+ int i;
+
+ for (i = 0; i < IDX_CACHE_MAX; i++) {
+ if (hwtnl->index_cache[prim][i].buffer != NULL &&
+ hwtnl->index_cache[prim][i].generate == generate)
+ {
+ if (compare(hwtnl->index_cache[prim][i].gen_nr, gen_nr, gen_type))
+ {
+ pipe_buffer_reference( out_buf,
+ hwtnl->index_cache[prim][i].buffer );
+
+ if (DBG)
+ debug_printf("%s retrieve %d/%d\n", __FUNCTION__, i, gen_nr);
+
+ return PIPE_OK;
+ }
+ else if (gen_type == U_GENERATE_REUSABLE)
+ {
+ pipe_buffer_reference( &hwtnl->index_cache[prim][i].buffer,
+ NULL );
+
+ if (DBG)
+ debug_printf("%s discard %d/%d\n", __FUNCTION__,
+ i, hwtnl->index_cache[prim][i].gen_nr);
+
+ break;
+ }
+ }
+ }
+
+ if (i == IDX_CACHE_MAX)
+ {
+ unsigned smallest = 0;
+ unsigned smallest_size = ~0;
+
+ for (i = 0; i < IDX_CACHE_MAX && smallest_size; i++) {
+ if (hwtnl->index_cache[prim][i].buffer == NULL)
+ {
+ smallest = i;
+ smallest_size = 0;
+ }
+ else if (hwtnl->index_cache[prim][i].gen_nr < smallest)
+ {
+ smallest = i;
+ smallest_size = hwtnl->index_cache[prim][i].gen_nr;
+ }
+ }
+
+ assert (smallest != IDX_CACHE_MAX);
+
+ pipe_buffer_reference( &hwtnl->index_cache[prim][smallest].buffer,
+ NULL );
+
+ if (DBG)
+ debug_printf("%s discard smallest %d/%d\n", __FUNCTION__,
+ smallest, smallest_size);
+
+ i = smallest;
+ }
+
+
+ ret = generate_indices( hwtnl,
+ gen_nr,
+ gen_size,
+ generate,
+ out_buf );
+ if (ret != PIPE_OK)
+ return ret;
+
+
+ hwtnl->index_cache[prim][i].generate = generate;
+ hwtnl->index_cache[prim][i].gen_nr = gen_nr;
+ pipe_buffer_reference( &hwtnl->index_cache[prim][i].buffer,
+ *out_buf );
+
+ if (DBG)
+ debug_printf("%s cache %d/%d\n", __FUNCTION__,
+ i, hwtnl->index_cache[prim][i].gen_nr);
+
+ return PIPE_OK;
+}
+
+
+
+static enum pipe_error
+simple_draw_arrays( struct svga_hwtnl *hwtnl,
+ unsigned prim, unsigned start, unsigned count )
+{
+ SVGA3dPrimitiveRange range;
+ unsigned hw_prim;
+ unsigned hw_count;
+
+ hw_prim = svga_translate_prim(prim, count, &hw_count);
+ if (hw_count == 0)
+ return PIPE_ERROR_BAD_INPUT;
+
+ range.primType = hw_prim;
+ range.primitiveCount = hw_count;
+ range.indexArray.surfaceId = SVGA3D_INVALID_ID;
+ range.indexArray.offset = 0;
+ range.indexArray.stride = 0;
+ range.indexWidth = 0;
+ range.indexBias = start;
+
+ /* Min/max index should be calculated prior to applying bias, so we
+ * end up with min_index = 0, max_index = count - 1 and everybody
+ * looking at those numbers knows to adjust them by
+ * range.indexBias.
+ */
+ return svga_hwtnl_prim( hwtnl, &range, 0, count - 1, NULL );
+}
+
+
+
+
+
+
+
+
+
+
+enum pipe_error
+svga_hwtnl_draw_arrays( struct svga_hwtnl *hwtnl,
+ unsigned prim,
+ unsigned start,
+ unsigned count)
+{
+ unsigned gen_prim, gen_size, gen_nr, gen_type;
+ u_generate_func gen_func;
+ enum pipe_error ret = PIPE_OK;
+
+ if (hwtnl->api_fillmode != PIPE_POLYGON_MODE_FILL &&
+ prim >= PIPE_PRIM_TRIANGLES)
+ {
+ gen_type = u_unfilled_generator( prim,
+ start,
+ count,
+ hwtnl->api_fillmode,
+ &gen_prim,
+ &gen_size,
+ &gen_nr,
+ &gen_func );
+ }
+ else {
+ gen_type = u_index_generator( svga_hw_prims,
+ prim,
+ start,
+ count,
+ hwtnl->api_pv,
+ hwtnl->hw_pv,
+ &gen_prim,
+ &gen_size,
+ &gen_nr,
+ &gen_func );
+ }
+
+ if (gen_type == U_GENERATE_LINEAR) {
+ return simple_draw_arrays( hwtnl, gen_prim, start, count );
+ }
+ else {
+ struct pipe_buffer *gen_buf = NULL;
+
+ /* Need to draw as indexed primitive.
+ * Potentially need to run the gen func to build an index buffer.
+ */
+ ret = retrieve_or_generate_indices( hwtnl,
+ prim,
+ gen_type,
+ gen_nr,
+ gen_size,
+ gen_func,
+ &gen_buf );
+ if (ret)
+ goto done;
+
+ ret = svga_hwtnl_simple_draw_range_elements( hwtnl,
+ gen_buf,
+ gen_size,
+ 0,
+ count - 1,
+ gen_prim,
+ 0,
+ gen_nr,
+ start );
+ if (ret)
+ goto done;
+
+ done:
+ if (gen_buf)
+ pipe_buffer_reference( &gen_buf, NULL );
+
+ return ret;
+ }
+}
+
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