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Diffstat (limited to 'src/gallium/drivers/i965simple/brw_draw.c')
-rw-r--r--src/gallium/drivers/i965simple/brw_draw.c239
1 files changed, 239 insertions, 0 deletions
diff --git a/src/gallium/drivers/i965simple/brw_draw.c b/src/gallium/drivers/i965simple/brw_draw.c
new file mode 100644
index 0000000000..648aaa0da5
--- /dev/null
+++ b/src/gallium/drivers/i965simple/brw_draw.c
@@ -0,0 +1,239 @@
+/**************************************************************************
+ *
+ * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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, 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 TUNGSTEN GRAPHICS AND/OR ITS 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 <stdlib.h>
+
+#include "brw_batch.h"
+#include "brw_draw.h"
+#include "brw_defines.h"
+#include "brw_context.h"
+#include "brw_state.h"
+
+#include "pipe/p_context.h"
+#include "pipe/internal/p_winsys_screen.h"
+
+static unsigned hw_prim[PIPE_PRIM_POLYGON+1] = {
+ _3DPRIM_POINTLIST,
+ _3DPRIM_LINELIST,
+ _3DPRIM_LINELOOP,
+ _3DPRIM_LINESTRIP,
+ _3DPRIM_TRILIST,
+ _3DPRIM_TRISTRIP,
+ _3DPRIM_TRIFAN,
+ _3DPRIM_QUADLIST,
+ _3DPRIM_QUADSTRIP,
+ _3DPRIM_POLYGON
+};
+
+
+static const int reduced_prim[PIPE_PRIM_POLYGON+1] = {
+ PIPE_PRIM_POINTS,
+ PIPE_PRIM_LINES,
+ PIPE_PRIM_LINES,
+ PIPE_PRIM_LINES,
+ PIPE_PRIM_TRIANGLES,
+ PIPE_PRIM_TRIANGLES,
+ PIPE_PRIM_TRIANGLES,
+ PIPE_PRIM_TRIANGLES,
+ PIPE_PRIM_TRIANGLES,
+ PIPE_PRIM_TRIANGLES
+};
+
+
+/* When the primitive changes, set a state bit and re-validate. Not
+ * the nicest and would rather deal with this by having all the
+ * programs be immune to the active primitive (ie. cope with all
+ * possibilities). That may not be realistic however.
+ */
+static void brw_set_prim(struct brw_context *brw, int prim)
+{
+ PRINT("PRIM: %d\n", prim);
+
+ /* Slight optimization to avoid the GS program when not needed:
+ */
+ if (prim == PIPE_PRIM_QUAD_STRIP &&
+ brw->attribs.Raster->flatshade &&
+ brw->attribs.Raster->fill_cw == PIPE_POLYGON_MODE_FILL &&
+ brw->attribs.Raster->fill_ccw == PIPE_POLYGON_MODE_FILL)
+ prim = PIPE_PRIM_TRIANGLE_STRIP;
+
+ if (prim != brw->primitive) {
+ brw->primitive = prim;
+ brw->state.dirty.brw |= BRW_NEW_PRIMITIVE;
+
+ if (reduced_prim[prim] != brw->reduced_primitive) {
+ brw->reduced_primitive = reduced_prim[prim];
+ brw->state.dirty.brw |= BRW_NEW_REDUCED_PRIMITIVE;
+ }
+
+ brw_validate_state(brw);
+ }
+
+}
+
+
+static unsigned trim(int prim, unsigned length)
+{
+ if (prim == PIPE_PRIM_QUAD_STRIP)
+ return length > 3 ? (length - length % 2) : 0;
+ else if (prim == PIPE_PRIM_QUADS)
+ return length - length % 4;
+ else
+ return length;
+}
+
+
+
+static boolean brw_emit_prim( struct brw_context *brw,
+ boolean indexed,
+ unsigned start,
+ unsigned count )
+
+{
+ struct brw_3d_primitive prim_packet;
+
+ if (BRW_DEBUG & DEBUG_PRIMS)
+ PRINT("PRIM: %d %d %d\n", brw->primitive, start, count);
+
+ prim_packet.header.opcode = CMD_3D_PRIM;
+ prim_packet.header.length = sizeof(prim_packet)/4 - 2;
+ prim_packet.header.pad = 0;
+ prim_packet.header.topology = hw_prim[brw->primitive];
+ prim_packet.header.indexed = indexed;
+
+ prim_packet.verts_per_instance = trim(brw->primitive, count);
+ prim_packet.start_vert_location = start;
+ prim_packet.instance_count = 1;
+ prim_packet.start_instance_location = 0;
+ prim_packet.base_vert_location = 0;
+
+ if (prim_packet.verts_per_instance == 0)
+ return TRUE;
+
+ return brw_batchbuffer_data( brw->winsys,
+ &prim_packet,
+ sizeof(prim_packet) );
+}
+
+
+/* May fail if out of video memory for texture or vbo upload, or on
+ * fallback conditions.
+ */
+static boolean brw_try_draw_elements( struct pipe_context *pipe,
+ struct pipe_buffer *index_buffer,
+ unsigned index_size,
+ unsigned mode,
+ unsigned start,
+ unsigned count )
+{
+ struct brw_context *brw = brw_context(pipe);
+
+ /* Set the first primitive ahead of validate_state:
+ */
+ brw_set_prim(brw, mode);
+
+ /* Upload index, vertex data:
+ */
+ if (index_buffer &&
+ !brw_upload_indices( brw, index_buffer, index_size, start, count ))
+ return FALSE;
+
+ if (!brw_upload_vertex_buffers(brw))
+ return FALSE;
+
+ if (!brw_upload_vertex_elements( brw ))
+ return FALSE;
+
+ /* XXX: Need to separate validate and upload of state.
+ */
+ if (brw->state.dirty.brw)
+ brw_validate_state( brw );
+
+ if (!brw_emit_prim(brw, index_buffer != NULL,
+ start, count))
+ return FALSE;
+
+ return TRUE;
+}
+
+
+
+static boolean brw_draw_elements( struct pipe_context *pipe,
+ struct pipe_buffer *indexBuffer,
+ unsigned indexSize,
+ unsigned mode,
+ unsigned start,
+ unsigned count )
+{
+ if (!brw_try_draw_elements( pipe,
+ indexBuffer,
+ indexSize,
+ mode, start, count ))
+ {
+ /* flush ? */
+
+ if (!brw_try_draw_elements( pipe,
+ indexBuffer,
+ indexSize,
+ mode, start,
+ count )) {
+ assert(0);
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+
+
+
+static boolean brw_draw_arrays( struct pipe_context *pipe,
+ unsigned mode,
+ unsigned start,
+ unsigned count )
+{
+ if (!brw_try_draw_elements( pipe, NULL, 0, mode, start, count )) {
+ /* flush ? */
+
+ if (!brw_try_draw_elements( pipe, NULL, 0, mode, start, count )) {
+ assert(0);
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+
+
+
+void brw_init_draw_functions( struct brw_context *brw )
+{
+ brw->pipe.draw_arrays = brw_draw_arrays;
+ brw->pipe.draw_elements = brw_draw_elements;
+}
+
+