vrend: Implement seamless cube maps

This was previously ignored.

Along with the mesa patch, this fixes ~100 dEQP tests:
dEQP-GLES3.functional.texture.filtering.cube.*

Signed-off-by: Stéphane Marchesin <marcheu@chromium.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>

src/virgl_protocol.h

@@ -330,6 +330,7 @@ enum virgl_context_cmd {
 #define VIRGL_OBJ_SAMPLE_STATE_S0_MAG_IMG_FILTER(x) (((x) & 0x3) << 13)
 #define VIRGL_OBJ_SAMPLE_STATE_S0_COMPARE_MODE(x) (((x) & 0x1) << 15)
 #define VIRGL_OBJ_SAMPLE_STATE_S0_COMPARE_FUNC(x) (((x) & 0x7) << 16)
+#define VIRGL_OBJ_SAMPLE_STATE_S0_SEAMLESS_CUBE_MAP(x) (((x) & 0x1) << 19)
 
 #define VIRGL_OBJ_SAMPLER_STATE_LOD_BIAS 3
 #define VIRGL_OBJ_SAMPLER_STATE_MIN_LOD 4

src/vrend_decode.c

@@ -594,6 +594,7 @@ static int vrend_decode_create_sampler_state(struct vrend_decode_ctx *ctx, uint3
    state.mag_img_filter = (tmp >> 13) & 0x3;
    state.compare_mode = (tmp >> 15) & 0x1;
    state.compare_func = (tmp >> 16) & 0x7;
+   state.seamless_cube_map = (tmp >> 19) & 0x1;
 
    state.lod_bias = uif(get_buf_entry(ctx, VIRGL_OBJ_SAMPLER_STATE_LOD_BIAS));
    state.min_lod = uif(get_buf_entry(ctx, VIRGL_OBJ_SAMPLER_STATE_MIN_LOD));

src/vrend_renderer.c

@@ -1287,6 +1287,7 @@ int vrend_create_sampler_state(struct vrend_context *ctx,
       glSamplerParameterf(state->id, GL_TEXTURE_MAX_LOD, templ->max_lod);
       glSamplerParameteri(state->id, GL_TEXTURE_COMPARE_MODE, templ->compare_mode ? GL_COMPARE_R_TO_TEXTURE : GL_NONE);
       glSamplerParameteri(state->id, GL_TEXTURE_COMPARE_FUNC, GL_NEVER + templ->compare_func);
+      glSamplerParameteri(state->id, GL_TEXTURE_CUBE_MAP_SEAMLESS, templ->seamless_cube_map);
       if (vrend_state.use_gles) {
          if (templ->lod_bias != 0.0f) {
             report_gles_warn(ctx, GLES_WARN_LOD_BIAS, 0);
@@ -3874,6 +3875,10 @@ static void vrend_apply_sampler_state(struct vrend_context *ctx,
       glTexParameteri(target, GL_TEXTURE_COMPARE_MODE, state->compare_mode ? GL_COMPARE_R_TO_TEXTURE : GL_NONE);
    if (tex->state.compare_func != state->compare_func || set_all)
       glTexParameteri(target, GL_TEXTURE_COMPARE_FUNC, GL_NEVER + state->compare_func);
+   if (state->seamless_cube_map)
+      glEnable(GL_TEXTURE_CUBE_MAP_SEAMLESS);
+   else
+      glDisable(GL_TEXTURE_CUBE_MAP_SEAMLESS);
 
    if (memcmp(&tex->state.border_color, &state->border_color, 16) || set_all)
       glTexParameterIuiv(target, GL_TEXTURE_BORDER_COLOR, state->border_color.ui);