blitter: add blitter destruction path

Reviewed-by: Jakob Bornecrantz <jakob@collabora.com>
Signed-off-by: Jakob Bornecrantz <jakob@collabora.com>

src/vrend_blitter.c

@@ -838,8 +838,18 @@ void vrend_renderer_blit_gl(UNUSED struct vrend_context *ctx,
       glBufferData(GL_ARRAY_BUFFER, sizeof(blit_ctx->vertices), blit_ctx->vertices, GL_STATIC_DRAW);
       glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
    }
+
+   glUseProgram(0);
+   glDeleteProgram(prog_id);
    glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_STENCIL_ATTACHMENT,
                              GL_TEXTURE_2D, 0, 0);
    glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0,
                              GL_TEXTURE_2D, 0, 0);
-}
+}
+
+void vrend_blitter_fini(void)
+{
+   vrend_blit_ctx.initialised = false;
+   vrend_clicbs->destroy_gl_context(vrend_blit_ctx.gl_context);
+   memset(&vrend_blit_ctx, 0, sizeof(vrend_blit_ctx));
+}

src/vrend_renderer.c

@@ -5211,6 +5211,7 @@ vrend_renderer_fini(void)
       vrend_state.eventfd = -1;
    }
 
+   vrend_blitter_fini();
    vrend_decode_reset(false);
    vrend_object_fini_resource_table();
    vrend_decode_reset(true);
@@ -8579,6 +8580,7 @@ void vrend_renderer_reset(void)
       vrend_state.stop_sync_thread = false;
    }
    vrend_reset_fences();
+   vrend_blitter_fini();
    vrend_decode_reset(false);
    vrend_object_fini_resource_table();
    vrend_decode_reset(true);

src/vrend_renderer.h

@@ -399,6 +399,7 @@ void vrend_renderer_blit_gl(struct vrend_context *ctx,
                             struct vrend_resource *dst_res,
                             const struct pipe_blit_info *info,
                             bool has_texture_srgb_decode);
+void vrend_blitter_fini(void);
 
 void vrend_renderer_reset(void);
 int vrend_renderer_get_poll_fd(void);