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panfrost: Implement depth range clipping

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This should fix glDepthRangef issues. Eventually, something similar
should allow implementing the depth bounds test.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
This commit is contained in:
Alyssa Rosenzweig 2019-08-16 10:25:34 -07:00
parent 5e268a01d2
commit d4542f8cb5
1 changed files with 12 additions and 3 deletions
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15
src/gallium/drivers/panfrost/pan_context.c
View file

@ -1209,9 +1209,6 @@ panfrost_emit_for_draw(struct panfrost_context *ctx, bool with_vertex_data)
.clip_miny = -INFINITY,
.clip_maxx = INFINITY,
.clip_maxy = INFINITY,
.clip_minz = 0.0,
.clip_maxz = 1.0,
};
/* Always scissor to the viewport by default. */
@ -1221,6 +1218,9 @@ panfrost_emit_for_draw(struct panfrost_context *ctx, bool with_vertex_data)
float vp_miny = (int) (vp->translate[1] - fabsf(vp->scale[1]));
float vp_maxy = (int) (vp->translate[1] + fabsf(vp->scale[1]));
float minz = (vp->translate[2] - fabsf(vp->scale[2]));
float maxz = (vp->translate[2] + fabsf(vp->scale[2]));
/* Apply the scissor test */
unsigned minx, miny, maxx, maxy;
@ -1253,6 +1253,12 @@ panfrost_emit_for_draw(struct panfrost_context *ctx, bool with_vertex_data)
maxx = temp;
}
if (minz > maxz) {
float temp = minz;
minz = maxz;
maxz = temp;
}
/* Clamp to the framebuffer size as a last check */
minx = MIN2(ctx->pipe_framebuffer.width, minx);
@ -1276,6 +1282,9 @@ panfrost_emit_for_draw(struct panfrost_context *ctx, bool with_vertex_data)
view.viewport0[1] = miny;
view.viewport1[1] = MALI_POSITIVE(maxy);
view.clip_minz = minz;
view.clip_maxz = maxz;
ctx->payloads[PIPE_SHADER_FRAGMENT].postfix.viewport =
panfrost_upload_transient(ctx,
&view,