#include "brw_context.h"
#include "brw_state.h"
#include "brw_defines.h"
+#include "compiler/brw_eu_defines.h"
#include "brw_util.h"
#include "intel_batchbuffer.h"
#include "main/fbobject.h"
+#include "main/framebuffer.h"
-static void
-upload_clip_state(struct brw_context *brw)
+bool
+brw_is_drawing_points(const struct brw_context *brw)
{
- struct gl_context *ctx = &brw->ctx;
- /* BRW_NEW_META_IN_PROGRESS */
- uint32_t dw1 = brw->meta_in_progress ? 0 : GEN6_CLIP_STATISTICS_ENABLE;
- uint32_t dw2 = 0;
-
- /* _NEW_BUFFERS */
- struct gl_framebuffer *fb = ctx->DrawBuffer;
-
- /* 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 (brw->gen >= 7)
- dw1 |= GEN7_CLIP_EARLY_CULL;
-
- if (brw->gen == 7) {
- /* _NEW_POLYGON */
- if ((ctx->Polygon.FrontFace == GL_CCW) ^ _mesa_is_user_fbo(fb))
- dw1 |= GEN7_CLIP_WINDING_CCW;
-
- if (ctx->Polygon.CullFlag) {
- switch (ctx->Polygon.CullFaceMode) {
- case GL_FRONT:
- dw1 |= GEN7_CLIP_CULLMODE_FRONT;
- break;
- case GL_BACK:
- dw1 |= GEN7_CLIP_CULLMODE_BACK;
- break;
- case GL_FRONT_AND_BACK:
- dw1 |= GEN7_CLIP_CULLMODE_BOTH;
- break;
- default:
- unreachable("Should not get here: invalid CullFlag");
- }
- } else {
- dw1 |= GEN7_CLIP_CULLMODE_NONE;
- }
+ /* Determine if the primitives *reaching the SF* are points */
+ /* _NEW_POLYGON */
+ if (brw->ctx.Polygon.FrontMode == GL_POINT ||
+ brw->ctx.Polygon.BackMode == GL_POINT) {
+ return true;
}
- if (brw->gen < 8 && !ctx->Transform.DepthClamp)
- dw2 |= GEN6_CLIP_Z_TEST;
-
- /* _NEW_LIGHT */
- if (ctx->Light.ProvokingVertex == GL_FIRST_VERTEX_CONVENTION) {
- dw2 |=
- (0 << GEN6_CLIP_TRI_PROVOKE_SHIFT) |
- (1 << GEN6_CLIP_TRIFAN_PROVOKE_SHIFT) |
- (0 << GEN6_CLIP_LINE_PROVOKE_SHIFT);
+ if (brw->gs.base.prog_data) {
+ /* BRW_NEW_GS_PROG_DATA */
+ return brw_gs_prog_data(brw->gs.base.prog_data)->output_topology ==
+ _3DPRIM_POINTLIST;
+ } else if (brw->tes.base.prog_data) {
+ /* BRW_NEW_TES_PROG_DATA */
+ return brw_tes_prog_data(brw->tes.base.prog_data)->output_topology ==
+ BRW_TESS_OUTPUT_TOPOLOGY_POINT;
} else {
- dw2 |=
- (2 << GEN6_CLIP_TRI_PROVOKE_SHIFT) |
- (2 << GEN6_CLIP_TRIFAN_PROVOKE_SHIFT) |
- (1 << GEN6_CLIP_LINE_PROVOKE_SHIFT);
+ /* BRW_NEW_PRIMITIVE */
+ return brw->primitive == _3DPRIM_POINTLIST;
}
+}
- /* _NEW_TRANSFORM */
- dw2 |= (ctx->Transform.ClipPlanesEnabled <<
- GEN6_USER_CLIP_CLIP_DISTANCES_SHIFT);
-
- dw2 |= GEN6_CLIP_GB_TEST;
-
- /* We need to disable guardband clipping if the guardband (which we always
- * program to the maximum screen-space bounding box of 8K x 8K) will be
- * smaller than the viewport.
- *
- * Closely examining the clip determination formulas in the documentation
- * reveals that objects will be discarded entirely if they're outside the
- * (small) guardband, even if they're within the (large) viewport:
- *
- * TR = TR_GB || TR_VPXY || TR_VPZ || TR_UC || TR_NEGW
- * TA = !TR && TA_GB && TA_VPZ && TA_NEGW
- * MC = !(TA || TR)
- *
- * (TA is "Trivial Accept", TR is "Trivial Reject", MC is "Must Clip".)
- *
- * Disabling guardband clipping removes the TR_GB condition, which means
- * they'll be considered MC ("Must Clip") unless they're rejected for
- * some other reason.
- *
- * Note that there is no TA_VPXY condition. If there were, objects entirely
- * inside a 16384x16384 viewport would be trivially accepted, breaking the
- * "objects must have a screenspace bounding box not exceeding 8K in the X
- * or Y direction" restriction. Instead, they're clipped.
- */
- for (unsigned i = 0; i < ctx->Const.MaxViewports; i++) {
- if (ctx->ViewportArray[i].Width > 8192 ||
- ctx->ViewportArray[i].Height > 8192) {
- dw2 &= ~GEN6_CLIP_GB_TEST;
- break;
- }
+bool
+brw_is_drawing_lines(const struct brw_context *brw)
+{
+ /* Determine if the primitives *reaching the SF* are points */
+ /* _NEW_POLYGON */
+ if (brw->ctx.Polygon.FrontMode == GL_LINE ||
+ brw->ctx.Polygon.BackMode == GL_LINE) {
+ return true;
}
- /* If the viewport dimensions are smaller than the drawable dimensions,
- * we have to disable guardband clipping prior to Gen8. We always program
- * the guardband to a fixed size, which is almost always larger than the
- * viewport. Any geometry which intersects the viewport but lies within
- * the guardband would bypass the 3D clipping stage, so it wouldn't be
- * clipped to the viewport. Rendering would happen beyond the viewport,
- * but still inside the drawable.
- *
- * Gen8+ introduces a viewport extents test which restricts rendering to
- * the viewport, so we can ignore this restriction.
- */
- if (brw->gen < 8) {
- for (unsigned i = 0; i < ctx->Const.MaxViewports; i++) {
- if (ctx->ViewportArray[i].X != 0 ||
- ctx->ViewportArray[i].Y != 0 ||
- ctx->ViewportArray[i].Width != (float) fb->Width ||
- ctx->ViewportArray[i].Height != (float) fb->Height) {
- dw2 &= ~GEN6_CLIP_GB_TEST;
- break;
- }
+ if (brw->gs.base.prog_data) {
+ /* BRW_NEW_GS_PROG_DATA */
+ return brw_gs_prog_data(brw->gs.base.prog_data)->output_topology ==
+ _3DPRIM_LINESTRIP;
+ } else if (brw->tes.base.prog_data) {
+ /* BRW_NEW_TES_PROG_DATA */
+ return brw_tes_prog_data(brw->tes.base.prog_data)->output_topology ==
+ BRW_TESS_OUTPUT_TOPOLOGY_LINE;
+ } else {
+ /* BRW_NEW_PRIMITIVE */
+ switch (brw->primitive) {
+ case _3DPRIM_LINELIST:
+ case _3DPRIM_LINESTRIP:
+ case _3DPRIM_LINELOOP:
+ return true;
}
}
-
- /* BRW_NEW_RASTERIZER_DISCARD */
- if (ctx->RasterDiscard) {
- dw2 |= GEN6_CLIP_MODE_REJECT_ALL;
- perf_debug("Rasterizer discard is currently implemented via the clipper; "
- "%s be faster.\n", brw->gen >= 7 ? "using the SOL unit may" :
- "having the GS not write primitives would likely");
- }
-
- uint32_t enable;
- if (brw->primitive == _3DPRIM_RECTLIST)
- enable = 0;
- else
- enable = GEN6_CLIP_ENABLE;
-
- BEGIN_BATCH(4);
- OUT_BATCH(_3DSTATE_CLIP << 16 | (4 - 2));
- OUT_BATCH(dw1);
- OUT_BATCH(enable |
- GEN6_CLIP_API_OGL |
- GEN6_CLIP_MODE_NORMAL |
- GEN6_CLIP_XY_TEST |
- 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 |
- (fb->MaxNumLayers > 0 ? 0 : GEN6_CLIP_FORCE_ZERO_RTAINDEX) |
- ((ctx->Const.MaxViewports - 1) & GEN6_CLIP_MAX_VP_INDEX_MASK));
- ADVANCE_BATCH();
+ return false;
}
-const struct brw_tracked_state gen6_clip_state = {
- .dirty = {
- .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,
-};
-
-const struct brw_tracked_state gen7_clip_state = {
- .dirty = {
- .mesa = _NEW_BUFFERS | _NEW_LIGHT | _NEW_POLYGON | _NEW_TRANSFORM,
- .brw = BRW_NEW_CONTEXT |
- BRW_NEW_META_IN_PROGRESS |
- BRW_NEW_RASTERIZER_DISCARD,
- .cache = CACHE_NEW_WM_PROG
- },
- .emit = upload_clip_state,
-};
projects / mesa.git / blobdiff