#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, sizeof(vp), 64, &brw->sf.vp_offset);
+ vp = brw_state_batch(brw, AUB_TRACE_SF_VP_STATE,
+ 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));
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,
};