#include "brw_defines.h"
#include "brw_util.h"
#include "intel_batchbuffer.h"
+#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;
+ 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 &
- (1 << BRW_WM_NONPERSPECTIVE_PIXEL_BARYCENTRIC)) {
- nonperspective_barycentric_enable_flag =
- GEN6_CLIP_NON_PERSPECTIVE_BARYCENTRIC_ENABLE;
+ 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:
+ assert(!"Should not get here: invalid CullFlag");
+ break;
+ }
+ } else {
+ dw1 |= GEN7_CLIP_CULLMODE_NONE;
+ }
}
- if (!ctx->Transform.DepthClamp)
- depth_clamp = GEN6_CLIP_Z_TEST;
+ if (brw->gen < 8 && !ctx->Transform.DepthClamp)
+ 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);
+
+ dw2 |= GEN6_CLIP_GB_TEST;
+ 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;
+ if (brw->gen >= 8) {
+ perf_debug("Disabling GB clipping due to lack of Gen8 viewport "
+ "clipping setup code. This should be fixed.");
+ }
+ break;
+ }
+ }
+
+ /* 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.", brw->gen >= 7 ? "using the SOL unit may" :
+ "having the GS not write primitives would likely");
+ }
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);
+ (fb->MaxNumLayers > 0 ? 0 : GEN6_CLIP_FORCE_ZERO_RTAINDEX) |
+ ((ctx->Const.MaxViewports - 1) & GEN6_CLIP_MAX_VP_INDEX_MASK));
ADVANCE_BATCH();
}
const struct brw_tracked_state gen6_clip_state = {
.dirty = {
- .mesa = _NEW_TRANSFORM | _NEW_LIGHT,
- .brw = (BRW_NEW_CONTEXT),
+ .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,