/**********************************************************
 * Copyright 2008-2009 VMware, Inc.  All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use, copy,
 * modify, merge, publish, distribute, sublicense, and/or sell copies
 * of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 **********************************************************/

#include "svga_resource_texture.h"
#include "svga_context.h"
#include "svga_debug.h"
#include "svga_cmd.h"
#include "svga_surface.h"

#include "util/u_format.h"
#include "util/u_surface.h"

#define FILE_DEBUG_FLAG DEBUG_BLIT


/* XXX still have doubts about this... */
static void svga_surface_copy(struct pipe_context *pipe,
                              struct pipe_resource* dst_tex,
                              unsigned dst_level,
                              unsigned dstx, unsigned dsty, unsigned dstz,
                              struct pipe_resource* src_tex,
                              unsigned src_level,
                              const struct pipe_box *src_box)
 {
   struct svga_context *svga = svga_context(pipe);
   struct svga_texture *stex, *dtex;
/*   struct pipe_screen *screen = pipe->screen;
   SVGA3dCopyBox *box;
   enum pipe_error ret;
   struct pipe_surface *srcsurf, *dstsurf;*/
   unsigned dst_face, dst_z, src_face, src_z;

   /* Emit buffered drawing commands, and any back copies.
    */
   svga_surfaces_flush( svga );

   /* Fallback for buffers. */
   if (dst_tex->target == PIPE_BUFFER && src_tex->target == PIPE_BUFFER) {
      util_resource_copy_region(pipe, dst_tex, dst_level, dstx, dsty, dstz,
                                src_tex, src_level, src_box);
      return;
   }

   stex = svga_texture(src_tex);
   dtex = svga_texture(dst_tex);

#if 0
   srcsurf = screen->get_tex_surface(screen, src_tex,
                                     src_level, src_box->z, src_box->z,
                                     PIPE_BIND_SAMPLER_VIEW);

   dstsurf = screen->get_tex_surface(screen, dst_tex,
                                     dst_level, dst_box->z, dst_box->z,
                                     PIPE_BIND_RENDER_TARGET);

   SVGA_DBG(DEBUG_DMA, "blit to sid %p (%d,%d), from sid %p (%d,%d) sz %dx%d\n",
            svga_surface(dstsurf)->handle,
            dstx, dsty,
            svga_surface(srcsurf)->handle,
            src_box->x, src_box->y,
            width, height);

   ret = SVGA3D_BeginSurfaceCopy(svga->swc,
                                 srcsurf,
                                 dstsurf,
                                 &box,
                                 1);
   if(ret != PIPE_OK) {

      svga_context_flush(svga, NULL);

      ret = SVGA3D_BeginSurfaceCopy(svga->swc,
                                    srcsurf,
                                    dstsurf,
                                    &box,
                                    1);
      assert(ret == PIPE_OK);
   }

   box->x = dstx;
   box->y = dsty;
   box->z = 0;
   box->w = width;
   box->h = height;
   box->d = 1;
   box->srcx = src_box->x;
   box->srcy = src_box->y;
   box->srcz = 0;

   SVGA_FIFOCommitAll(svga->swc);

   svga_surface(dstsurf)->dirty = TRUE;
   svga_propagate_surface(pipe, dstsurf);

   pipe_surface_reference(&srcsurf, NULL);
   pipe_surface_reference(&dstsurf, NULL);

#else
   if (src_tex->target == PIPE_TEXTURE_CUBE) {
      src_face = src_box->z;
      src_z = 0;
      assert(src_box->depth == 1);
   }
   else {
      src_face = 0;
      src_z = src_box->z;
   }
   /* different src/dst type???*/
   if (dst_tex->target == PIPE_TEXTURE_CUBE) {
      dst_face = dstz;
      dst_z = 0;
      assert(src_box->depth == 1);
   }
   else {
      dst_face = 0;
      dst_z = dstz;
   }
   svga_texture_copy_handle(svga,
                            stex->handle,
                            src_box->x, src_box->y, src_z,
                            src_level, src_face,
                            dtex->handle,
                            dstx, dsty, dst_z,
                            dst_level, dst_face,
                            src_box->width, src_box->height, src_box->depth);

#endif

}


static void svga_blit(struct pipe_context *pipe,
                      const struct pipe_blit_info *blit_info)
{
   struct svga_context *svga = svga_context(pipe);
   struct pipe_blit_info info = *blit_info;

   if (info.src.resource->nr_samples > 1 &&
       info.dst.resource->nr_samples <= 1 &&
       !util_format_is_depth_or_stencil(info.src.resource->format) &&
       !util_format_is_pure_integer(info.src.resource->format)) {
      debug_printf("svga: color resolve unimplemented\n");
      return;
   }

   if (util_try_blit_via_copy_region(pipe, &info)) {
      return; /* done */
   }

   if (info.mask & PIPE_MASK_S) {
      debug_printf("svga: cannot blit stencil, skipping\n");
      info.mask &= ~PIPE_MASK_S;
   }

   if (!util_blitter_is_blit_supported(svga->blitter, &info)) {
      debug_printf("svga: blit unsupported %s -> %s\n",
                   util_format_short_name(info.src.resource->format),
                   util_format_short_name(info.dst.resource->format));
      return;
   }

   /* XXX turn off occlusion and streamout queries */

   util_blitter_save_vertex_buffer_slot(svga->blitter, svga->curr.vb);
   util_blitter_save_vertex_elements(svga->blitter, (void*)svga->curr.velems);
   util_blitter_save_vertex_shader(svga->blitter, svga->curr.vs);
   /*util_blitter_save_geometry_shader(svga->blitter, svga->curr.gs);*/
   /*util_blitter_save_so_targets(svga->blitter, svga->num_so_targets,
                     (struct pipe_stream_output_target**)svga->so_targets);*/
   util_blitter_save_rasterizer(svga->blitter, (void*)svga->curr.rast);
   util_blitter_save_viewport(svga->blitter, &svga->curr.viewport);
   util_blitter_save_scissor(svga->blitter, &svga->curr.scissor);
   util_blitter_save_fragment_shader(svga->blitter, svga->curr.fs);
   util_blitter_save_blend(svga->blitter, (void*)svga->curr.blend);
   util_blitter_save_depth_stencil_alpha(svga->blitter,
                                         (void*)svga->curr.depth);
   util_blitter_save_stencil_ref(svga->blitter, &svga->curr.stencil_ref);
   /*util_blitter_save_sample_mask(svga->blitter, svga->sample_mask);*/
   util_blitter_save_framebuffer(svga->blitter, &svga->curr.framebuffer);
   util_blitter_save_fragment_sampler_states(svga->blitter,
                     svga->curr.num_samplers,
                     (void**)svga->curr.sampler);
   util_blitter_save_fragment_sampler_views(svga->blitter,
                     svga->curr.num_sampler_views,
                     svga->curr.sampler_views);
   /*util_blitter_save_render_condition(svga->blitter, svga->render_cond_query,
                                      svga->render_cond_cond, svga->render_cond_mode);*/
   util_blitter_blit(svga->blitter, &info);
}


static void
svga_flush_resource(struct pipe_context *pipe,
                    struct pipe_resource *resource)
{
}


void
svga_init_blit_functions(struct svga_context *svga)
{
   svga->pipe.resource_copy_region = svga_surface_copy;
   svga->pipe.blit = svga_blit;
   svga->pipe.flush_resource = svga_flush_resource;
}