#include "brw_defines.h"
#include "brw_util.h"
#include "intel_batchbuffer.h"
-
-/**
- * Return true if at least one of the inputs used by the given fragment
- * program has the GLSL "noperspective" interpolation qualifier.
- */
-bool
-brw_fprog_uses_noperspective(const struct gl_fragment_program *fprog)
-{
- int attr;
- for (attr = 0; attr < FRAG_ATTRIB_MAX; ++attr) {
- /* Ignore unused inputs. */
- if (!(fprog->Base.InputsRead & BITFIELD64_BIT(attr)))
- continue;
-
- if (fprog->InterpQualifier[attr] == INTERP_QUALIFIER_NOPERSPECTIVE)
- return true;
- }
- return false;
-}
-
+#include "main/fbobject.h"
static void
upload_clip_state(struct brw_context *brw)
{
- struct intel_context *intel = &brw->intel;
- struct gl_context *ctx = &intel->ctx;
- uint32_t depth_clamp = 0;
- uint32_t provoking, userclip;
- uint32_t nonperspective_barycentric_enable_flag = 0;
- /* BRW_NEW_FRAGMENT_PROGRAM */
- const struct gl_fragment_program *fprog = brw->fragment_program;
+ struct gl_context *ctx = &brw->ctx;
+ uint32_t dw1 = brw->meta_in_progress ? 0 : GEN6_CLIP_STATISTICS_ENABLE;
+ uint32_t dw2 = 0;
- if (brw_fprog_uses_noperspective(fprog)) {
- nonperspective_barycentric_enable_flag =
- GEN6_CLIP_NON_PERSPECTIVE_BARYCENTRIC_ENABLE;
- }
+ /* _NEW_BUFFERS */
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
- if (brw->hiz.op) {
- /* HiZ operations emit a rectangle primitive, which requires clipping to
- * be disabled. From page 10 of the Sandy Bridge PRM Volume 2 Part 1
- * Section 1.3 3D Primitives Overview:
- * RECTLIST:
- * Either the CLIP unit should be DISABLED, or the CLIP unit's Clip
- * Mode should be set to a value other than CLIPMODE_NORMAL.
- */
- BEGIN_BATCH(4);
- OUT_BATCH(_3DSTATE_CLIP << 16 | (4 - 2));
- OUT_BATCH(0);
- OUT_BATCH(0);
- OUT_BATCH(0);
- ADVANCE_BATCH();
- return;
+ /* CACHE_NEW_WM_PROG */
+ if (brw->wm.prog_data->barycentric_interp_modes &
+ BRW_WM_NONPERSPECTIVE_BARYCENTRIC_BITS) {
+ dw2 |= GEN6_CLIP_NON_PERSPECTIVE_BARYCENTRIC_ENABLE;
}
if (!ctx->Transform.DepthClamp)
- depth_clamp = GEN6_CLIP_Z_TEST;
+ dw2 |= GEN6_CLIP_Z_TEST;
/* _NEW_LIGHT */
if (ctx->Light.ProvokingVertex == GL_FIRST_VERTEX_CONVENTION) {
- provoking =
+ dw2 |=
(0 << GEN6_CLIP_TRI_PROVOKE_SHIFT) |
(1 << GEN6_CLIP_TRIFAN_PROVOKE_SHIFT) |
(0 << GEN6_CLIP_LINE_PROVOKE_SHIFT);
} else {
- provoking =
+ dw2 |=
(2 << GEN6_CLIP_TRI_PROVOKE_SHIFT) |
(2 << GEN6_CLIP_TRIFAN_PROVOKE_SHIFT) |
(1 << GEN6_CLIP_LINE_PROVOKE_SHIFT);
}
/* _NEW_TRANSFORM */
- userclip = ctx->Transform.ClipPlanesEnabled;
+ dw2 |= (ctx->Transform.ClipPlanesEnabled <<
+ GEN6_USER_CLIP_CLIP_DISTANCES_SHIFT);
+
+ if (ctx->Viewport.X == 0 &&
+ ctx->Viewport.Y == 0 &&
+ ctx->Viewport.Width == fb->Width &&
+ ctx->Viewport.Height == fb->Height) {
+ dw2 |= GEN6_CLIP_GB_TEST;
+ }
+
+ /* BRW_NEW_RASTERIZER_DISCARD */
+ if (ctx->RasterDiscard) {
+ dw2 |= GEN6_CLIP_MODE_REJECT_ALL;
+ perf_debug("Rasterizer discard is currently implemented via the clipper; "
+ "having the GS not write primitives would likely be faster.");
+ }
BEGIN_BATCH(4);
OUT_BATCH(_3DSTATE_CLIP << 16 | (4 - 2));
- OUT_BATCH(GEN6_CLIP_STATISTICS_ENABLE);
+ OUT_BATCH(dw1);
OUT_BATCH(GEN6_CLIP_ENABLE |
GEN6_CLIP_API_OGL |
GEN6_CLIP_MODE_NORMAL |
- nonperspective_barycentric_enable_flag |
GEN6_CLIP_XY_TEST |
- userclip << GEN6_USER_CLIP_CLIP_DISTANCES_SHIFT |
- depth_clamp |
- provoking);
+ dw2);
OUT_BATCH(U_FIXED(0.125, 3) << GEN6_CLIP_MIN_POINT_WIDTH_SHIFT |
U_FIXED(255.875, 3) << GEN6_CLIP_MAX_POINT_WIDTH_SHIFT |
GEN6_CLIP_FORCE_ZERO_RTAINDEX);
const struct brw_tracked_state gen6_clip_state = {
.dirty = {
- .mesa = _NEW_TRANSFORM | _NEW_LIGHT,
- .brw = (BRW_NEW_CONTEXT |
- BRW_NEW_FRAGMENT_PROGRAM |
- BRW_NEW_HIZ),
- .cache = 0
+ .mesa = _NEW_TRANSFORM | _NEW_LIGHT | _NEW_BUFFERS,
+ .brw = BRW_NEW_CONTEXT |
+ BRW_NEW_META_IN_PROGRESS |
+ BRW_NEW_RASTERIZER_DISCARD,
+ .cache = CACHE_NEW_WM_PROG
},
.emit = upload_clip_state,
};