diff options
author | Eric Anholt <anholt@FreeBSD.org> | 2006-08-09 19:14:05 +0000 |
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committer | Eric Anholt <anholt@FreeBSD.org> | 2006-08-09 19:14:05 +0000 |
commit | 9f344b3e7d6e23674dd4747faec253f103563b36 (patch) | |
tree | e5df3c1ab9a424831d4a4363567a87ff91cc0581 /src/mesa/drivers/dri/i965/brw_clip.c | |
parent | 7b52bed98729a05feab28f6d2b0677e4f84c44c3 (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.c | 264 |
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 +}; |