renderer: query host for max texture sizes

This way we can report the actual max texture, rather than a
conservative guess like we do now.

Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Signed-off-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Signed-off-by: Jakob Bornecrantz <jakob@collabora.com>

src/virgl_hw.h

@@ -347,6 +347,9 @@ struct virgl_caps_v2 {
         uint32_t max_compute_shared_memory_size;
         uint32_t max_compute_grid_size[3];
         uint32_t max_compute_block_size[3];
+        uint32_t max_texture_2d_size;
+        uint32_t max_texture_3d_size;
+        uint32_t max_texture_cube_size;
 };
 
 union virgl_caps {

src/vrend_renderer.c

@@ -8092,6 +8092,10 @@ static void vrend_renderer_fill_caps_v2(int gl_ver, int gles_ver,  union virgl_c
 
    glGetIntegerv(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT, (GLint*)&caps->v2.uniform_buffer_offset_alignment);
 
+   glGetIntegerv(GL_MAX_TEXTURE_SIZE, (GLint*)&caps->v2.max_texture_2d_size);
+   glGetIntegerv(GL_MAX_3D_TEXTURE_SIZE, (GLint*)&caps->v2.max_texture_3d_size);
+   glGetIntegerv(GL_MAX_CUBE_MAP_TEXTURE_SIZE, (GLint*)&caps->v2.max_texture_cube_size);
+
    if (has_feature(feat_geometry_shader)) {
       glGetIntegerv(GL_MAX_GEOMETRY_OUTPUT_VERTICES, (GLint*)&caps->v2.max_geom_output_vertices);
       glGetIntegerv(GL_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS, (GLint*)&caps->v2.max_geom_total_output_components);