nir: Add a flag to lower_io to force "sample" interpolation

[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 e9aacd56317f6db659976ab0ccf2e9f43bfe2ee2..34f93afdef647ec132556dbdbc5dd67851d6e01c 100644 (file)
--- a/src/mesa/drivers/dri/i965/gen7_viewport_state.c
+++ b/src/mesa/drivers/dri/i965/gen7_viewport_state.c
@@ -25,49 +25,66 @@
 #include "brw_state.h"
 #include "brw_defines.h"
 #include "intel_batchbuffer.h"
+#include "main/fbobject.h"
+#include "main/framebuffer.h"
+#include "main/viewport.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;
-   const GLfloat depth_scale = 1.0F / ctx->DrawBuffer->_DepthMaxF;
+   struct gl_context *ctx = &brw->ctx;
    GLfloat y_scale, y_bias;
-   const GLboolean render_to_fbo = (ctx->DrawBuffer->Name != 0);
-   const GLfloat *v = ctx->Viewport._WindowMap.m;
+   const bool render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer);
    struct gen7_sf_clip_viewport *vp;
 
    vp = brw_state_batch(brw, AUB_TRACE_SF_VP_STATE,
-                       sizeof(vp), 64, &brw->sf.vp_offset);
+                        sizeof(*vp) * ctx->Const.MaxViewports, 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;
-
    /* _NEW_BUFFERS */
    if (render_to_fbo) {
       y_scale = 1.0;
-      y_bias = 0;
+      y_bias = 0.0;
    } else {
       y_scale = -1.0;
-      y_bias = ctx->DrawBuffer->Height;
+      y_bias = (float)_mesa_geometric_height(ctx->DrawBuffer);
    }
 
-   /* _NEW_VIEWPORT */
-   vp->viewport.m00 = v[MAT_SX];
-   vp->viewport.m11 = v[MAT_SY] * y_scale;
-   vp->viewport.m22 = v[MAT_SZ] * depth_scale;
-   vp->viewport.m30 = v[MAT_TX];
-   vp->viewport.m31 = v[MAT_TY] * y_scale + y_bias;
-   vp->viewport.m32 = v[MAT_TZ] * depth_scale;
-}
+   for (unsigned i = 0; i < ctx->Const.MaxViewports; i++) {
+      float scale[3], translate[3];
+      _mesa_get_viewport_xform(ctx, i, scale, translate);
 
-static void upload_sf_clip_viewport_state_pointer(struct brw_context *brw)
-{
-   struct intel_context *intel = &brw->intel;
+      /* 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;
+      const float gbx = maximum_guardband_extent / ctx->ViewportArray[i].Width;
+      const float gby = maximum_guardband_extent / ctx->ViewportArray[i].Height;
+
+      vp[i].guardband.xmin = -gbx;
+      vp[i].guardband.xmax = gbx;
+      vp[i].guardband.ymin = -gby;
+      vp[i].guardband.ymax = gby;
+
+      /* _NEW_VIEWPORT */
+      vp[i].viewport.m00 = scale[0];
+      vp[i].viewport.m11 = scale[1] * y_scale;
+      vp[i].viewport.m22 = scale[2];
+      vp[i].viewport.m30 = translate[0];
+      vp[i].viewport.m31 = translate[1] * y_scale + y_bias;
+      vp[i].viewport.m32 = translate[2];
+   }
 
    BEGIN_BATCH(2);
    OUT_BATCH(_3DSTATE_VIEWPORT_STATE_POINTERS_SF_CL << 16 | (2 - 2));
@@ -77,31 +94,10 @@ static void upload_sf_clip_viewport_state_pointer(struct brw_context *brw)
 
 const struct brw_tracked_state gen7_sf_clip_viewport = {
    .dirty = {
-      .mesa = _NEW_VIEWPORT | _NEW_BUFFERS,
-      .brw = BRW_NEW_BATCH,
-      .cache = 0,
-   },
-   .prepare = prepare_sf_clip_viewport,
-   .emit = upload_sf_clip_viewport_state_pointer,
-};
-
-/* ----------------------------------------------------- */
-
-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);
-   ADVANCE_BATCH();
-}
-
-const struct brw_tracked_state gen7_cc_viewport_state_pointer = {
-   .dirty = {
-      .mesa = 0,
-      .brw = BRW_NEW_BATCH,
-      .cache = CACHE_NEW_CC_VP
+      .mesa = _NEW_BUFFERS |
+              _NEW_VIEWPORT,
+      .brw = BRW_NEW_BATCH |
+             BRW_NEW_BLORP,
    },
-   .emit = upload_cc_viewport_state_pointer,
+   .emit = gen7_upload_sf_clip_viewport,
 };