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authorEric Anholt <anholt@FreeBSD.org>2006-08-09 19:14:05 +0000
committerEric Anholt <anholt@FreeBSD.org>2006-08-09 19:14:05 +0000
commit9f344b3e7d6e23674dd4747faec253f103563b36 (patch)
treee5df3c1ab9a424831d4a4363567a87ff91cc0581 /src/mesa/drivers/dri/i965/brw_clip.c
parent7b52bed98729a05feab28f6d2b0677e4f84c44c3 (diff)
Add Intel i965G/Q DRI driver.
This driver comes from Tungsten Graphics, with a few further modifications by Intel.
Diffstat (limited to 'src/mesa/drivers/dri/i965/brw_clip.c')
-rw-r--r--src/mesa/drivers/dri/i965/brw_clip.c264
1 files changed, 264 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_clip.c b/src/mesa/drivers/dri/i965/brw_clip.c
new file mode 100644
index 0000000000..0e8591aaa8
--- /dev/null
+++ b/src/mesa/drivers/dri/i965/brw_clip.c
@@ -0,0 +1,264 @@
+/*
+ Copyright (C) Intel Corp. 2006. All Rights Reserved.
+ Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
+ develop this 3D driver.
+
+ 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 (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 NONINFRINGEMENT.
+ IN NO EVENT SHALL THE COPYRIGHT OWNER(S) 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.
+
+ **********************************************************************/
+ /*
+ * Authors:
+ * Keith Whitwell <keith@tungstengraphics.com>
+ */
+
+#include "glheader.h"
+#include "macros.h"
+#include "enums.h"
+
+#include "intel_batchbuffer.h"
+
+#include "brw_defines.h"
+#include "brw_context.h"
+#include "brw_eu.h"
+#include "brw_util.h"
+#include "brw_state.h"
+#include "brw_clip.h"
+
+
+#define FRONT_UNFILLED_BIT 0x1
+#define BACK_UNFILLED_BIT 0x2
+
+
+static void compile_clip_prog( struct brw_context *brw,
+ struct brw_clip_prog_key *key )
+{
+ struct brw_clip_compile c;
+ const GLuint *program;
+ GLuint program_size;
+ GLuint delta;
+ GLuint i;
+
+ memset(&c, 0, sizeof(c));
+
+ /* Begin the compilation:
+ */
+ brw_init_compile(&c.func);
+
+ c.key = *key;
+
+
+ /* Need to locate the two positions present in vertex + header.
+ * These are currently hardcoded:
+ */
+ c.header_position_offset = ATTR_SIZE;
+
+ for (i = 0, delta = REG_SIZE; i < VERT_RESULT_MAX; i++)
+ if (c.key.attrs & (1<<i)) {
+ c.offset[i] = delta;
+ delta += ATTR_SIZE;
+ }
+
+ c.nr_attrs = brw_count_bits(c.key.attrs);
+ c.nr_regs = (c.nr_attrs + 1) / 2 + 1; /* are vertices packed, or reg-aligned? */
+ c.nr_bytes = c.nr_regs * REG_SIZE;
+
+ c.prog_data.clip_mode = c.key.clip_mode; /* XXX */
+
+ /* For some reason the thread is spawned with only 4 channels
+ * unmasked.
+ */
+ brw_set_mask_control(&c.func, BRW_MASK_DISABLE);
+
+
+ /* Would ideally have the option of producing a program which could
+ * do all three:
+ */
+ switch (key->primitive) {
+ case GL_TRIANGLES:
+ if (key->do_unfilled)
+ brw_emit_unfilled_clip( &c );
+ else
+ brw_emit_tri_clip( &c );
+ break;
+ case GL_LINES:
+ brw_emit_line_clip( &c );
+ break;
+ case GL_POINTS:
+ brw_emit_point_clip( &c );
+ break;
+ default:
+ assert(0);
+ return;
+ }
+
+
+
+ /* get the program
+ */
+ program = brw_get_program(&c.func, &program_size);
+
+ /* Upload
+ */
+ brw->clip.prog_gs_offset = brw_upload_cache( &brw->cache[BRW_CLIP_PROG],
+ &c.key,
+ sizeof(c.key),
+ program,
+ program_size,
+ &c.prog_data,
+ &brw->clip.prog_data );
+}
+
+
+static GLboolean search_cache( struct brw_context *brw,
+ struct brw_clip_prog_key *key )
+{
+ return brw_search_cache(&brw->cache[BRW_CLIP_PROG],
+ key, sizeof(*key),
+ &brw->clip.prog_data,
+ &brw->clip.prog_gs_offset);
+}
+
+
+
+
+/* Calculate interpolants for triangle and line rasterization.
+ */
+static void upload_clip_prog( struct brw_context *brw )
+{
+ GLcontext *ctx = &brw->intel.ctx;
+ struct brw_clip_prog_key key;
+
+ memset(&key, 0, sizeof(key));
+
+ /* Populate the key:
+ */
+ /* BRW_NEW_REDUCED_PRIMITIVE */
+ key.primitive = brw->intel.reduced_primitive;
+ /* CACHE_NEW_VS_PROG */
+ key.attrs = brw->vs.prog_data->outputs_written;
+ /* _NEW_LIGHT */
+ key.do_flat_shading = (brw->attribs.Light->ShadeModel == GL_FLAT);
+ /* _NEW_TRANSFORM */
+ key.nr_userclip = brw_count_bits(brw->attribs.Transform->ClipPlanesEnabled);
+ key.clip_mode = BRW_CLIPMODE_NORMAL;
+
+ /* _NEW_POLYGON */
+ if (key.primitive == GL_TRIANGLES) {
+ if (brw->attribs.Polygon->CullFaceMode == GL_FRONT_AND_BACK)
+ key.clip_mode = BRW_CLIPMODE_REJECT_ALL;
+ else {
+ GLuint fill_front = CLIP_CULL;
+ GLuint fill_back = CLIP_CULL;
+ GLuint offset_front = 0;
+ GLuint offset_back = 0;
+
+ if (!brw->attribs.Polygon->CullFlag ||
+ brw->attribs.Polygon->CullFaceMode != GL_FRONT) {
+ switch (brw->attribs.Polygon->FrontMode) {
+ case GL_FILL:
+ fill_front = CLIP_FILL;
+ offset_front = 0;
+ break;
+ case GL_LINE:
+ key.do_unfilled = 1;
+ fill_front = CLIP_LINE;
+ offset_front = brw->attribs.Polygon->OffsetLine;
+ break;
+ case GL_POINT:
+ key.do_unfilled = 1;
+ fill_front = CLIP_POINT;
+ offset_front = brw->attribs.Polygon->OffsetPoint;
+ break;
+ }
+ }
+
+ if (!brw->attribs.Polygon->CullFlag ||
+ brw->attribs.Polygon->CullFaceMode != GL_BACK) {
+ switch (brw->attribs.Polygon->BackMode) {
+ case GL_FILL:
+ fill_back = CLIP_FILL;
+ offset_back = 0;
+ break;
+ case GL_LINE:
+ key.do_unfilled = 1;
+ fill_back = CLIP_LINE;
+ offset_back = brw->attribs.Polygon->OffsetLine;
+ break;
+ case GL_POINT:
+ key.do_unfilled = 1;
+ fill_back = CLIP_POINT;
+ offset_back = brw->attribs.Polygon->OffsetPoint;
+ break;
+ }
+ }
+
+ /* Most cases the fixed function units will handle. Cases where
+ * one or more polygon faces are unfilled will require help:
+ */
+ if (key.do_unfilled) {
+ key.clip_mode = BRW_CLIPMODE_CLIP_NON_REJECTED;
+
+ if (offset_back || offset_front) {
+ /* _NEW_POLYGON, _NEW_BUFFERS */
+ key.offset_units = brw->attribs.Polygon->OffsetUnits * brw->intel.polygon_offset_scale;
+ key.offset_factor = brw->attribs.Polygon->OffsetFactor * ctx->DrawBuffer->_MRD;
+ }
+
+ switch (brw->attribs.Polygon->FrontFace) {
+ case GL_CCW:
+ key.fill_ccw = fill_front;
+ key.fill_cw = fill_back;
+ key.offset_ccw = offset_front;
+ key.offset_cw = offset_back;
+ if (brw->attribs.Light->Model.TwoSide &&
+ key.fill_cw != CLIP_CULL)
+ key.copy_bfc_cw = 1;
+ break;
+ case GL_CW:
+ key.fill_cw = fill_front;
+ key.fill_ccw = fill_back;
+ key.offset_cw = offset_front;
+ key.offset_ccw = offset_back;
+ if (brw->attribs.Light->Model.TwoSide &&
+ key.fill_ccw != CLIP_CULL)
+ key.copy_bfc_ccw = 1;
+ break;
+ }
+ }
+ }
+ }
+
+ if (!search_cache(brw, &key))
+ compile_clip_prog( brw, &key );
+}
+
+
+const struct brw_tracked_state brw_clip_prog = {
+ .dirty = {
+ .mesa = (_NEW_LIGHT |
+ _NEW_TRANSFORM |
+ _NEW_POLYGON |
+ _NEW_BUFFERS),
+ .brw = (BRW_NEW_REDUCED_PRIMITIVE),
+ .cache = CACHE_NEW_VS_PROG
+ },
+ .update = upload_clip_prog
+};