i965/fs: Add support for translating ir_triop_fma into MAD.

[mesa.git] / src / mesa / drivers / dri / i965 / gen7_viewport_state.c

diff --git a/src/mesa/drivers/dri/i965/gen7_viewport_state.c b/src/mesa/drivers/dri/i965/gen7_viewport_state.c
index 838ad3a394842d4c1825c86ccbf44d53fed11f0b..8c5fcac2b22e3954b12f8f7c3458aa3ed4d76c89 100644 (file)
--- a/src/mesa/drivers/dri/i965/gen7_viewport_state.c
+++ b/src/mesa/drivers/dri/i965/gen7_viewport_state.c
@@ -25,26 +25,42 @@
 #include "brw_state.h"
 #include "brw_defines.h"
 #include "intel_batchbuffer.h"
+#include "main/fbobject.h"
 
 static void
-prepare_sf_clip_viewport(struct brw_context *brw)
+gen7_upload_sf_clip_viewport(struct brw_context *brw)
 {
-   struct gl_context *ctx = &brw->intel.ctx;
+   struct gl_context *ctx = &brw->ctx;
    const GLfloat depth_scale = 1.0F / ctx->DrawBuffer->_DepthMaxF;
    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;
    struct gen7_sf_clip_viewport *vp;
 
-   vp = brw_state_batch(brw, sizeof(vp), 64, &brw->sf.vp_offset);
+   vp = brw_state_batch(brw, AUB_TRACE_SF_VP_STATE,
+                       sizeof(*vp), 64, &brw->sf.vp_offset);
    /* Also assign to clip.vp_offset in case something uses it. */
    brw->clip.vp_offset = brw->sf.vp_offset;
 
-   /* Disable guardband clipping (see gen6_viewport_state.c for rationale). */
-   vp->guardband.xmin = -1.0;
-   vp->guardband.xmax = 1.0;
-   vp->guardband.ymin = -1.0;
-   vp->guardband.ymax = 1.0;
+   /* According to the "Vertex X,Y Clamping and Quantization" section of the
+    * Strips and Fans documentation, objects must not have a screen-space
+    * extents of over 8192 pixels, or they may be mis-rasterized.  The maximum
+    * screen space coordinates of a small object may larger, but we have no
+    * way to enforce the object size other than through clipping.
+    *
+    * If you're surprised that we set clip to -gbx to +gbx and it seems like
+    * we'll end up with 16384 wide, note that for a 8192-wide render target,
+    * we'll end up with a normal (-1, 1) clip volume that just covers the
+    * drawable.
+    */
+   const float maximum_guardband_extent = 8192;
+   float gbx = maximum_guardband_extent / (float) ctx->Viewport.Width;
+   float gby = maximum_guardband_extent / (float) ctx->Viewport.Height;
+
+   vp->guardband.xmin = -gbx;
+   vp->guardband.xmax = gbx;
+   vp->guardband.ymin = -gby;
+   vp->guardband.ymax = gby;
 
    /* _NEW_BUFFERS */
    if (render_to_fbo) {
@@ -62,11 +78,6 @@ prepare_sf_clip_viewport(struct brw_context *brw)
    vp->viewport.m30 = v[MAT_TX];
    vp->viewport.m31 = v[MAT_TY] * y_scale + y_bias;
    vp->viewport.m32 = v[MAT_TZ] * depth_scale;
-}
-
-static void upload_sf_clip_viewport_state_pointer(struct brw_context *brw)
-{
-   struct intel_context *intel = &brw->intel;
 
    BEGIN_BATCH(2);
    OUT_BATCH(_3DSTATE_VIEWPORT_STATE_POINTERS_SF_CL << 16 | (2 - 2));
@@ -80,16 +91,13 @@ const struct brw_tracked_state gen7_sf_clip_viewport = {
       .brw = BRW_NEW_BATCH,
       .cache = 0,
    },
-   .prepare = prepare_sf_clip_viewport,
-   .emit = upload_sf_clip_viewport_state_pointer,
+   .emit = gen7_upload_sf_clip_viewport,
 };
 
 /* ----------------------------------------------------- */
 
 static void upload_cc_viewport_state_pointer(struct brw_context *brw)
 {
-   struct intel_context *intel = &brw->intel;
-
    BEGIN_BATCH(2);
    OUT_BATCH(_3DSTATE_VIEWPORT_STATE_POINTERS_CC << 16 | (2 - 2));
    OUT_BATCH(brw->cc.vp_offset);