diff options
Diffstat (limited to 'src/gallium/drivers/virgl/virgl_context.c')
| -rw-r--r-- | src/gallium/drivers/virgl/virgl_context.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/src/gallium/drivers/virgl/virgl_context.c b/src/gallium/drivers/virgl/virgl_context.c index e6f8dc85256..d985bf906fb 100644 --- a/src/gallium/drivers/virgl/virgl_context.c +++ b/src/gallium/drivers/virgl/virgl_context.c @@ -920,6 +920,42 @@ virgl_context_destroy( struct pipe_context *ctx ) FREE(vctx); } +static void virgl_get_sample_position(struct pipe_context *ctx, + unsigned sample_count, + unsigned index, + float *out_value) +{ + struct virgl_context *vctx = virgl_context(ctx); + struct virgl_screen *vs = virgl_screen(vctx->base.screen); + + if (sample_count > vs->caps.caps.v1.max_samples) { + debug_printf("VIRGL: requested %d MSAA samples, but only %d supported\n", + sample_count, vs->caps.caps.v1.max_samples); + return; + } + + /* The following is basically copied from dri/i965gen6_get_sample_position + * The only addition is that we hold the msaa positions for all sample + * counts in a flat array. */ + uint32_t bits = 0; + if (sample_count == 1) { + out_value[0] = out_value[1] = 0.5f; + return; + } else if (sample_count == 2) { + bits = vs->caps.caps.v2.msaa_sample_positions[0] >> (8 * index); + } else if (sample_count < 4) { + bits = vs->caps.caps.v2.msaa_sample_positions[1] >> (8 * index); + } else if (sample_count < 8) { + bits = vs->caps.caps.v2.msaa_sample_positions[2 + (index >> 2)] >> (8 * (index & 3)); + } else if (sample_count < 8) { + bits = vs->caps.caps.v2.msaa_sample_positions[4 + (index >> 2)] >> (8 * (index & 3)); + } + out_value[0] = ((bits >> 4) & 0xf) / 16.0f; + out_value[1] = (bits & 0xf) / 16.0f; + debug_printf("VIRGL: sample postion [%2d/%2d] = (%f, %f)\n", + index, sample_count, out_value[0], out_value[1]); +} + struct pipe_context *virgl_context_create(struct pipe_screen *pscreen, void *priv, unsigned flags) @@ -994,6 +1030,8 @@ struct pipe_context *virgl_context_create(struct pipe_screen *pscreen, vctx->base.set_blend_color = virgl_set_blend_color; + vctx->base.get_sample_position = virgl_get_sample_position; + vctx->base.resource_copy_region = virgl_resource_copy_region; vctx->base.flush_resource = virgl_flush_resource; vctx->base.blit = virgl_blit; |