1 files changed, 59 insertions, 0 deletions
diff --git a/src/gallium/drivers/panfrost/pan_job.c b/src/gallium/drivers/panfrost/pan_job.c
index a7fc5f975cf..1882cc4faf3 100644
--- a/src/gallium/drivers/panfrost/pan_job.c
+++ b/src/gallium/drivers/panfrost/pan_job.c
@@ -26,6 +26,7 @@
 #include "pan_context.h"
 #include "util/hash_table.h"
 #include "util/ralloc.h"
+#include "util/u_format.h"
 
 struct panfrost_job *
 panfrost_create_job(struct panfrost_context *ctx)
@@ -176,6 +177,64 @@ panfrost_job_set_requirements(struct panfrost_context *ctx,
                 job->requirements |= PAN_REQ_DEPTH_WRITE;
 }
 
+static uint32_t
+pan_pack_color(const union pipe_color_union *color, enum pipe_format format)
+{
+        /* Alpha magicked to 1.0 if there is no alpha */
+
+        bool has_alpha = util_format_has_alpha(format);
+        float clear_alpha = has_alpha ? color->f[3] : 1.0f;
+
+        /* Packed color depends on the framebuffer format */
+
+        const struct util_format_description *desc =
+                util_format_description(format);
+
+        if (util_format_is_rgba8_variant(desc)) {
+                return (float_to_ubyte(clear_alpha) << 24) |
+                       (float_to_ubyte(color->f[2]) << 16) |
+                       (float_to_ubyte(color->f[1]) <<  8) |
+                       (float_to_ubyte(color->f[0]) <<  0);
+        } else if (format == PIPE_FORMAT_B5G6R5_UNORM) {
+                /* First, we convert the components to R5, G6, B5 separately */
+                unsigned r5 = CLAMP(color->f[0], 0.0, 1.0) * 31.0;
+                unsigned g6 = CLAMP(color->f[1], 0.0, 1.0) * 63.0;
+                unsigned b5 = CLAMP(color->f[2], 0.0, 1.0) * 31.0;
+
+                /* Then we pack into a sparse u32. TODO: Why these shifts? */
+                return (b5 << 25) | (g6 << 14) | (r5 << 5);
+        } else {
+                /* Unknown format */
+                assert(0);
+        }
+
+        return 0;
+}
+
+void
+panfrost_job_clear(struct panfrost_context *ctx,
+                struct panfrost_job *job,
+                unsigned buffers,
+                const union pipe_color_union *color,
+                double depth, unsigned stencil)
+
+{
+        if (buffers & PIPE_CLEAR_COLOR) {
+                enum pipe_format format = ctx->pipe_framebuffer.cbufs[0]->format;
+                job->clear_color = pan_pack_color(color, format);
+        }
+
+        if (buffers & PIPE_CLEAR_DEPTH) {
+                job->clear_depth = depth;
+        }
+
+        if (buffers & PIPE_CLEAR_STENCIL) {
+                job->clear_stencil = stencil;
+        }
+
+        job->clear |= buffers;
+}
+
 void
 panfrost_flush_jobs_reading_resource(struct panfrost_context *panfrost,
                                 struct pipe_resource *prsc)