#include "brw_state.h"
#include "brw_defines.h"
#include "intel_batchbuffer.h"
+#include "main/fbobject.h"
/* The clip VP defines the guardband region where expensive clipping is skipped
* and fragments are allowed to be generated and clipped out cheaply by the SF.
- *
- * By setting it to NDC bounds of [-1,1], we don't do GB clipping. It's
- * supposed to cause seams to become visible in apps due to shared edges taking
- * different clip/no clip paths depending on whether the rest of the prim ends
- * up in the guardband or not.
*/
static void
-prepare_clip_vp(struct brw_context *brw)
+gen6_upload_clip_vp(struct brw_context *brw)
{
+ struct gl_context *ctx = &brw->intel.ctx;
struct brw_clipper_viewport *vp;
vp = brw_state_batch(brw, AUB_TRACE_CLIP_VP_STATE,
sizeof(*vp), 32, &brw->clip.vp_offset);
- vp->xmin = -1.0;
- vp->xmax = 1.0;
- vp->ymin = -1.0;
- vp->ymax = 1.0;
+ /* According to the Sandybridge PRM, Volume 2, Part 1, Section 6.3.8
+ * "Vertex X,Y Clamping and Quantization", the screen-aligned 2D
+ * bounding-box of an object must not exceed 16K pixels in either X or Y.
+ */
+ const float maximum_post_clamp_delta = 16384;
+ 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;
brw->state.dirty.cache |= CACHE_NEW_CLIP_VP;
}
const struct brw_tracked_state gen6_clip_vp = {
.dirty = {
- .mesa = 0,
+ .mesa = _NEW_VIEWPORT,
.brw = BRW_NEW_BATCH,
.cache = 0,
},
- .prepare = prepare_clip_vp,
+ .emit = gen6_upload_clip_vp,
};
static void
-prepare_sf_vp(struct brw_context *brw)
+gen6_upload_sf_vp(struct brw_context *brw)
{
struct gl_context *ctx = &brw->intel.ctx;
const GLfloat depth_scale = 1.0F / ctx->DrawBuffer->_DepthMaxF;
struct brw_sf_viewport *sfv;
GLfloat y_scale, y_bias;
- const GLboolean render_to_fbo = (ctx->DrawBuffer->Name != 0);
+ const bool render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer);
const GLfloat *v = ctx->Viewport._WindowMap.m;
sfv = brw_state_batch(brw, AUB_TRACE_SF_VP_STATE,
.brw = BRW_NEW_BATCH,
.cache = 0,
},
- .prepare = prepare_sf_vp,
+ .emit = gen6_upload_sf_vp,
};
static void upload_viewport_state_pointers(struct brw_context *brw)