renderer: add support for handling blit render conditions.

This with a change in the mesa side should fix the remaining
render condition test fails

src/gallium/include/pipe/p_state.h

@@ -591,6 +591,10 @@ struct pipe_blit_info
 
    boolean scissor_enable;
    struct pipe_scissor_state scissor;
+
+   boolean render_condition_enable; /**< whether the blit should honor the
+                                       current render condition */
+   boolean alpha_blend; /* dst.rgb = src.rgb * src.a + dst.rgb * (1 - src.a) */
 };
 
 

src/virgl_protocol.h

@@ -388,6 +388,8 @@ enum virgl_context_cmd {
 #define VIRGL_CMD_BLIT_S0_MASK(x) (((x) & 0xff) << 0)
 #define VIRGL_CMD_BLIT_S0_FILTER(x) (((x) & 0x3) << 8)
 #define VIRGL_CMD_BLIT_S0_SCISSOR_ENABLE(x) (((x) & 0x1) << 10)
+#define VIRGL_CMD_BLIT_S0_RENDER_CONDITION_ENABLE(x) (((x) & 0x1) << 11)
+#define VIRGL_CMD_BLIT_S0_ALPHA_BLEND(x) (((x) & 0x1) << 12)
 #define VIRGL_CMD_BLIT_SCISSOR_MINX_MINY 2
 #define VIRGL_CMD_BLIT_SCISSOR_MAXX_MAXY 3
 #define VIRGL_CMD_BLIT_DST_RES_HANDLE 4

src/vrend_decode.c

@@ -875,6 +875,8 @@ static int vrend_decode_blit(struct vrend_decode_ctx *ctx, int length)
    info.mask = temp & 0xff;
    info.filter = (temp >> 8) & 0x3;
    info.scissor_enable = (temp >> 10) & 0x1;
+   info.render_condition_enable = (temp >> 11) & 0x1;
+   info.alpha_blend = (temp >> 12) & 0x1;
    temp = get_buf_entry(ctx, VIRGL_CMD_BLIT_SCISSOR_MINX_MINY);
    info.scissor.minx = temp & 0xffff;
    info.scissor.miny = (temp >> 16) & 0xffff;

src/vrend_renderer.c

@@ -367,6 +367,9 @@ struct vrend_sub_context {
    struct vrend_streamout_object *current_so;
 
    struct pipe_blend_color blend_color;
+
+   uint32_t cond_render_q_id;
+   GLenum cond_render_gl_mode;
 };
 
 struct vrend_context {
@@ -397,6 +400,7 @@ struct vrend_context {
 };
 
 static struct vrend_resource *vrend_renderer_ctx_res_lookup(struct vrend_context *ctx, int res_handle);
+static void vrend_pause_render_condition(struct vrend_context *ctx, bool pause);
 static void vrend_update_viewport_state(struct vrend_context *ctx);
 static void vrend_update_scissor_state(struct vrend_context *ctx);
 static void vrend_destroy_query_object(void *obj_ptr);
@@ -5571,7 +5575,13 @@ void vrend_renderer_blit(struct vrend_context *ctx,
    if (ctx->in_error)
       return;
 
+   if (info->render_condition_enable == false)
+      vrend_pause_render_condition(ctx, true);
+
    vrend_renderer_blit_int(ctx, src_res, dst_res, info);
+
+   if (info->render_condition_enable == false)
+      vrend_pause_render_condition(ctx, false);
 }
 
 int vrend_renderer_create_fence(int client_fence_id, uint32_t ctx_id)
@@ -5874,6 +5884,18 @@ void vrend_get_query_result(struct vrend_context *ctx, uint32_t handle,
       list_addtail(&q->waiting_queries, &vrend_state.waiting_query_list);
 }
 
+static void vrend_pause_render_condition(struct vrend_context *ctx, bool pause)
+{
+   if (pause) {
+      if (ctx->sub->cond_render_q_id)
+         glEndConditionalRenderNV();
+   } else {
+      if (ctx->sub->cond_render_q_id)
+         glBeginConditionalRender(ctx->sub->cond_render_q_id,
+                                  ctx->sub->cond_render_gl_mode);
+   }
+}
+
 void vrend_render_condition(struct vrend_context *ctx,
                             uint32_t handle,
                             bool condition,
@@ -5884,6 +5906,8 @@ void vrend_render_condition(struct vrend_context *ctx,
 
    if (handle == 0) {
       glEndConditionalRenderNV();
+      ctx->sub->cond_render_q_id = 0;
+      ctx->sub->cond_render_gl_mode = 0;
       return;
    }
 
@@ -5908,6 +5932,8 @@ void vrend_render_condition(struct vrend_context *ctx,
       fprintf(stderr, "unhandled condition %x\n", mode);
    }
 
+   ctx->sub->cond_render_q_id = q->id;
+   ctx->sub->cond_render_gl_mode = glmode;
    glBeginConditionalRender(q->id, glmode);
 
 }