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panfrost: Implement scissor test

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This preliminary implementation should handle some basic cases. Future
work should scissor the FRAGMENT job as well for efficiency.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
This commit is contained in:
Alyssa Rosenzweig
2019-03-24 21:51:49 +00:00
parent bd9446e719
commit 121417ef1d
1 changed files with 16 additions and 6 deletions
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src/gallium/drivers/panfrost/pan_context.c
+16 -6
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@@ -1062,9 +1062,11 @@ panfrost_emit_for_draw(struct panfrost_context *ctx, bool with_vertex_data)
/* For flipped-Y buffers (signaled by negative scale), the translate is
* flipped as well */
float translate_y =
vp->scale[1] >= 0.0 ? vp->translate[1] :
(ctx->pipe_framebuffer.height - vp->translate[1]);
bool invert_y = vp->scale[1] < 0.0;
float translate_y = vp->translate[1];
if (invert_y)
translate_y = ctx->pipe_framebuffer.height - translate_y;
float viewport_vec4[] = {
vp->scale[0],
@@ -1161,11 +1163,19 @@ panfrost_emit_for_draw(struct panfrost_context *ctx, bool with_vertex_data)
view.viewport0[1] = (int) (translate_y - fabs(vp->scale[1]));
view.viewport1[1] = MALI_POSITIVE((int) (translate_y + fabs(vp->scale[1])));
if (ss && ctx->rasterizer && ctx->rasterizer->base.scissor && 0) {
if (ss && ctx->rasterizer && ctx->rasterizer->base.scissor) {
/* Invert scissor if needed */
unsigned miny = invert_y ?
ctx->pipe_framebuffer.height - ss->maxy : ss->miny;
unsigned maxy = invert_y ?
ctx->pipe_framebuffer.height - ss->miny : ss->maxy;
/* Set the actual scissor */
view.viewport0[0] = ss->minx;
view.viewport0[1] = ss->miny;
view.viewport0[1] = miny;
view.viewport1[0] = MALI_POSITIVE(ss->maxx);
view.viewport1[1] = MALI_POSITIVE(ss->maxy);
view.viewport1[1] = MALI_POSITIVE(maxy);
}
ctx->payload_tiler.postfix.viewport =