i965/gs: Add a case to brwNewProgram() for geometry shaders.

[mesa.git] / src / mesa / drivers / dri / i965 / brw_clip_state.c

diff --git a/src/mesa/drivers/dri/i965/brw_clip_state.c b/src/mesa/drivers/dri/i965/brw_clip_state.c
index 275a92163307fad9dbfda3023db420d13228df65..634719bd031b7026f39cafa3fc57287bbb99c604 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_clip_state.c
+++ b/src/mesa/drivers/dri/i965/brw_clip_state.c
@@ -33,13 +33,36 @@
 #include "brw_state.h"
 #include "brw_defines.h"
 
+static void
+upload_clip_vp(struct brw_context *brw)
+{
+   struct gl_context *ctx = &brw->ctx;
+   struct brw_clipper_viewport *vp;
+
+   vp = brw_state_batch(brw, AUB_TRACE_CLIP_VP_STATE,
+                        sizeof(*vp), 32, &brw->clip.vp_offset);
+
+   const float maximum_post_clamp_delta = 4096;
+   float gbx = maximum_post_clamp_delta / (float) ctx->Viewport.Width;
+   float gby = maximum_post_clamp_delta / (float) ctx->Viewport.Height;
+
+   vp->xmin = -gbx;
+   vp->xmax = gbx;
+   vp->ymin = -gby;
+   vp->ymax = gby;
+}
+
 static void
 brw_upload_clip_unit(struct brw_context *brw)
 {
-   struct intel_context *intel = &brw->intel;
-   struct gl_context *ctx = &intel->ctx;
+   struct gl_context *ctx = &brw->ctx;
    struct brw_clip_unit_state *clip;
 
+   /* _NEW_BUFFERS */
+   struct gl_framebuffer *fb = ctx->DrawBuffer;
+
+   upload_clip_vp(brw);
+
    clip = brw_state_batch(brw, AUB_TRACE_CLIP_STATE,
                          sizeof(*clip), 32, &brw->clip.state_offset);
    memset(clip, 0, sizeof(*clip));
@@ -80,7 +103,7 @@ brw_upload_clip_unit(struct brw_context *brw)
       /* Although up to 16 concurrent Clip threads are allowed on Ironlake,
        * only 2 threads can output VUEs at a time.
        */
-      if (intel->gen == 5)
+      if (brw->gen == 5)
          clip->thread4.max_threads = 16 - 1;
       else
          clip->thread4.max_threads = 2 - 1;
@@ -92,10 +115,34 @@ brw_upload_clip_unit(struct brw_context *brw)
    if (unlikely(INTEL_DEBUG & DEBUG_STATS))
       clip->thread4.stats_enable = 1;
 
-   clip->clip5.userclip_enable_flags = 0x7f;
+   /* _NEW_TRANSFORM */
+   if (brw->gen == 5 || brw->is_g4x)
+      clip->clip5.userclip_enable_flags = ctx->Transform.ClipPlanesEnabled;
+   else
+      /* Up to 6 actual clip flags, plus the 7th for negative RHW workaround. */
+      clip->clip5.userclip_enable_flags = (ctx->Transform.ClipPlanesEnabled & 0x3f) | 0x40;
+
    clip->clip5.userclip_must_clip = 1;
-   clip->clip5.guard_band_enable = 0;
-   /* _NEW_TRANSOFORM */
+
+   /* enable guardband clipping if we can */
+   if (ctx->Viewport.X == 0 &&
+       ctx->Viewport.Y == 0 &&
+       ctx->Viewport.Width == fb->Width &&
+       ctx->Viewport.Height == fb->Height)
+   {
+      clip->clip5.guard_band_enable = 1;
+      clip->clip6.clipper_viewport_state_ptr =
+         (brw->batch.bo->offset + brw->clip.vp_offset) >> 5;
+
+      /* emit clip viewport relocation */
+      drm_intel_bo_emit_reloc(brw->batch.bo,
+                              (brw->clip.state_offset +
+                               offsetof(struct brw_clip_unit_state, clip6)),
+                              brw->batch.bo, brw->clip.vp_offset,
+                              I915_GEM_DOMAIN_INSTRUCTION, 0);
+   }
+
+   /* _NEW_TRANSFORM */
    if (!ctx->Transform.DepthClamp)
       clip->clip5.viewport_z_clip_enable = 1;
    clip->clip5.viewport_xy_clip_enable = 1;
@@ -103,10 +150,9 @@ brw_upload_clip_unit(struct brw_context *brw)
    clip->clip5.api_mode = BRW_CLIP_API_OGL;
    clip->clip5.clip_mode = brw->clip.prog_data->clip_mode;
 
-   if (intel->is_g4x)
+   if (brw->is_g4x)
       clip->clip5.negative_w_clip_test = 1;
 
-   clip->clip6.clipper_viewport_state_ptr = 0;
    clip->viewport_xmin = -1;
    clip->viewport_xmax = 1;
    clip->viewport_ymin = -1;
@@ -117,7 +163,7 @@ brw_upload_clip_unit(struct brw_context *brw)
 
 const struct brw_tracked_state brw_clip_unit = {
    .dirty = {
-      .mesa  = _NEW_TRANSFORM,
+      .mesa  = _NEW_TRANSFORM | _NEW_BUFFERS | _NEW_VIEWPORT,
       .brw   = (BRW_NEW_BATCH |
                BRW_NEW_PROGRAM_CACHE |
                BRW_NEW_CURBE_OFFSETS |