diff options
Diffstat (limited to 'src/gallium/drivers/i965simple/brw_draw.c')
| -rw-r--r-- | src/gallium/drivers/i965simple/brw_draw.c | 239 |
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..7598e3dc8a --- /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/p_winsys.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; +} + + |