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panfrost: Make scissor test more robust

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See v3d implementation.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
This commit is contained in:
Alyssa Rosenzweig 2019-07-17 16:30:09 -07:00
parent 5c554e235d
commit fad76470d5
1 changed files with 15 additions and 8 deletions
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23
src/gallium/drivers/panfrost/pan_context.c
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@ -1371,19 +1371,26 @@ panfrost_emit_for_draw(struct panfrost_context *ctx, bool with_vertex_data)
};
/* Always scissor to the viewport by default. */
int minx = (int) (vp->translate[0] - vp->scale[0]);
int maxx = (int) (vp->translate[0] + vp->scale[0]);
float vp_minx = (int) (vp->translate[0] - fabsf(vp->scale[0]));
float vp_maxx = (int) (vp->translate[0] + fabsf(vp->scale[0]));
int miny = (int) (vp->translate[1] - vp->scale[1]);
int maxy = (int) (vp->translate[1] + vp->scale[1]);
float vp_miny = (int) (vp->translate[1] - fabsf(vp->scale[1]));
float vp_maxy = (int) (vp->translate[1] + fabsf(vp->scale[1]));
/* Apply the scissor test */
unsigned minx, miny, maxx, maxy;
if (ss && ctx->rasterizer && ctx->rasterizer->base.scissor) {
minx = ss->minx;
maxx = ss->maxx;
miny = ss->miny;
maxy = ss->maxy;
minx = MAX2(ss->minx, vp_minx);
miny = MAX2(ss->miny, vp_miny);
maxx = MIN2(ss->maxx, vp_maxx);
maxy = MIN2(ss->maxy, vp_maxy);
} else {
minx = vp_minx;
miny = vp_miny;
maxx = vp_maxx;
maxy = vp_maxy;
}
/* Hardware needs the min/max to be strictly ordered, so flip if we