freedreno/a3xx: implement half-z clipping

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>

diff --git a/src/gallium/drivers/freedreno/a3xx/a3xx.xml.h b/src/gallium/drivers/freedreno/a3xx/a3xx.xml.h
index 441bfec..a157dc3 100644 (file)
--- a/src/gallium/drivers/freedreno/a3xx/a3xx.xml.h
+++ b/src/gallium/drivers/freedreno/a3xx/a3xx.xml.h
@@ -680,6 +680,7 @@ static inline uint32_t REG_A3XX_CP_PROTECT_REG(uint32_t i0) { return 0x00000460
 #define A3XX_GRAS_CL_CLIP_CNTL_VP_CLIP_CODE_IGNORE             0x00080000
 #define A3XX_GRAS_CL_CLIP_CNTL_VP_XFORM_DISABLE                        0x00100000
 #define A3XX_GRAS_CL_CLIP_CNTL_PERSP_DIVISION_DISABLE          0x00200000
+#define A3XX_GRAS_CL_CLIP_CNTL_ZERO_GB_SCALE_Z                 0x00400000
 #define A3XX_GRAS_CL_CLIP_CNTL_ZCOORD                          0x00800000
 #define A3XX_GRAS_CL_CLIP_CNTL_WCOORD                          0x01000000
 #define A3XX_GRAS_CL_CLIP_CNTL_ZCLIP_DISABLE                   0x02000000

diff --git a/src/gallium/drivers/freedreno/a3xx/fd3_rasterizer.c b/src/gallium/drivers/freedreno/a3xx/fd3_rasterizer.c
index 583caaa..260eacd 100644 (file)
--- a/src/gallium/drivers/freedreno/a3xx/fd3_rasterizer.c
+++ b/src/gallium/drivers/freedreno/a3xx/fd3_rasterizer.c
@@ -65,7 +65,8 @@ fd3_rasterizer_state_create(struct pipe_context *pctx,
        if (cso->multisample)
                TODO
 */
-       so->gras_cl_clip_cntl = A3XX_GRAS_CL_CLIP_CNTL_IJ_PERSP_CENTER; /* ??? */
+       so->gras_cl_clip_cntl = A3XX_GRAS_CL_CLIP_CNTL_IJ_PERSP_CENTER /* ??? */ |
+               COND(cso->clip_halfz, A3XX_GRAS_CL_CLIP_CNTL_ZERO_GB_SCALE_Z);
        so->gras_su_point_minmax =
                        A3XX_GRAS_SU_POINT_MINMAX_MIN(psize_min) |
                        A3XX_GRAS_SU_POINT_MINMAX_MAX(psize_max);

diff --git a/src/gallium/drivers/freedreno/freedreno_screen.c b/src/gallium/drivers/freedreno/freedreno_screen.c
index 86e9a21..17dd47c 100644 (file)
--- a/src/gallium/drivers/freedreno/freedreno_screen.c
+++ b/src/gallium/drivers/freedreno/freedreno_screen.c
@@ -191,6 +191,7 @@ fd_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
                return 16383;
 
        case PIPE_CAP_DEPTH_CLIP_DISABLE:
+       case PIPE_CAP_CLIP_HALFZ:
        case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
                return is_a3xx(screen);
 
@@ -228,7 +229,6 @@ fd_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
        case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
        case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
        case PIPE_CAP_SAMPLER_VIEW_TARGET:
-       case PIPE_CAP_CLIP_HALFZ:
        case PIPE_CAP_POLYGON_OFFSET_CLAMP:
        case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
        case PIPE_CAP_RESOURCE_FROM_USER_MEMORY: