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authorEric Anholt <eric@anholt.net>2007-12-17 14:51:24 -0800
committerEric Anholt <eric@anholt.net>2007-12-17 15:30:04 -0800
commit447facfcd6d807128ebf6ba3efc894180b447494 (patch)
treef612f1d5d531ab3412aef8d81d095ca64c5096c3 /src/mesa/drivers/dri/i965
parent8336f3ffb7e4033337a1d0eafef43cbf3329f499 (diff)
[965] Simplify scissor handling by using DrawBuffer values.
Diffstat (limited to 'src/mesa/drivers/dri/i965')
-rw-r--r--src/mesa/drivers/dri/i965/brw_sf_state.c85
-rw-r--r--src/mesa/drivers/dri/i965/brw_structs.h1
2 files changed, 33 insertions, 53 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_sf_state.c b/src/mesa/drivers/dri/i965/brw_sf_state.c
index 8891693e87..6c085a1dbf 100644
--- a/src/mesa/drivers/dri/i965/brw_sf_state.c
+++ b/src/mesa/drivers/dri/i965/brw_sf_state.c
@@ -43,62 +43,41 @@ static void upload_sf_vp(struct brw_context *brw)
struct brw_sf_viewport sfv;
memset(&sfv, 0, sizeof(sfv));
-
- if (brw->intel.driDrawable)
- {
- /* _NEW_VIEWPORT, BRW_NEW_METAOPS */
-
- if (!brw->metaops.active) {
- const GLfloat *v = ctx->Viewport._WindowMap.m;
-
- sfv.viewport.m00 = v[MAT_SX];
- sfv.viewport.m11 = - v[MAT_SY];
- sfv.viewport.m22 = v[MAT_SZ] * depth_scale;
- sfv.viewport.m30 = v[MAT_TX];
- sfv.viewport.m31 = - v[MAT_TY] + brw->intel.driDrawable->h;
- sfv.viewport.m32 = v[MAT_TZ] * depth_scale;
- }
- else {
- sfv.viewport.m00 = 1;
- sfv.viewport.m11 = - 1;
- sfv.viewport.m22 = 1;
- sfv.viewport.m30 = 0;
- sfv.viewport.m31 = brw->intel.driDrawable->h;
- sfv.viewport.m32 = 0;
- }
- }
- /* XXX: what state for this? */
- if (brw->intel.driDrawable)
- {
- intelScreenPrivate *screen = brw->intel.intelScreen;
- /* _NEW_SCISSOR */
- GLint x = brw->attribs.Scissor->X;
- GLint y = brw->attribs.Scissor->Y;
- GLuint w = brw->attribs.Scissor->Width;
- GLuint h = brw->attribs.Scissor->Height;
-
- GLint x1 = x;
- GLint y1 = brw->intel.driDrawable->h - (y + h);
- GLint x2 = x + w - 1;
- GLint y2 = y1 + h - 1;
-
- if (x1 < 0) x1 = 0;
- if (y1 < 0) y1 = 0;
- if (x2 < 0) x2 = 0;
- if (y2 < 0) y2 = 0;
-
- if (x2 >= screen->width) x2 = screen->width-1;
- if (y2 >= screen->height) y2 = screen->height-1;
- if (x1 >= screen->width) x1 = screen->width-1;
- if (y1 >= screen->height) y1 = screen->height-1;
-
- sfv.scissor.xmin = x1;
- sfv.scissor.xmax = x2;
- sfv.scissor.ymin = y1;
- sfv.scissor.ymax = y2;
+ /* _NEW_VIEWPORT, BRW_NEW_METAOPS */
+
+ if (!brw->metaops.active) {
+ const GLfloat *v = ctx->Viewport._WindowMap.m;
+
+ sfv.viewport.m00 = v[MAT_SX];
+ sfv.viewport.m11 = - v[MAT_SY];
+ sfv.viewport.m22 = v[MAT_SZ] * depth_scale;
+ sfv.viewport.m30 = v[MAT_TX];
+ sfv.viewport.m31 = - v[MAT_TY] + ctx->DrawBuffer->Height;
+ sfv.viewport.m32 = v[MAT_TZ] * depth_scale;
+ } else {
+ sfv.viewport.m00 = 1;
+ sfv.viewport.m11 = - 1;
+ sfv.viewport.m22 = 1;
+ sfv.viewport.m30 = 0;
+ sfv.viewport.m31 = ctx->DrawBuffer->Height;
+ sfv.viewport.m32 = 0;
}
+ /* _NEW_SCISSOR */
+
+ /* The scissor only needs to handle the intersection of drawable and
+ * scissor rect. Clipping to the boundaries of static shared buffers
+ * for front/back/depth is covered by looping over cliprects in brw_draw.c.
+ *
+ * Note that the hardware's coordinates are inclusive, while Mesa's min is
+ * inclusive but max is exclusive.
+ */
+ sfv.scissor.xmin = ctx->DrawBuffer->_Xmin;
+ sfv.scissor.xmax = ctx->DrawBuffer->_Xmax - 1;
+ sfv.scissor.ymin = ctx->DrawBuffer->Height - ctx->DrawBuffer->_Ymax;
+ sfv.scissor.ymax = ctx->DrawBuffer->Height - ctx->DrawBuffer->_Ymin - 1;
+
dri_bo_unreference(brw->sf.vp_bo);
brw->sf.vp_bo = brw_cache_data( &brw->cache, BRW_SF_VP, &sfv, NULL, 0 );
}
diff --git a/src/mesa/drivers/dri/i965/brw_structs.h b/src/mesa/drivers/dri/i965/brw_structs.h
index b4500ea8a5..dd11640e6b 100644
--- a/src/mesa/drivers/dri/i965/brw_structs.h
+++ b/src/mesa/drivers/dri/i965/brw_structs.h
@@ -924,6 +924,7 @@ struct brw_sf_viewport
GLfloat m32;
} viewport;
+ /* scissor coordinates are inclusive */
struct {
GLshort xmin;
GLshort ymin;