Fix T62876: Camera Background Images

Migrate old legacy code to the draw mamager/object mode. The old legacy
version did not work with wireframe. By migrating the code
to modern draw manager code we have mode control on the drawing process.

Still background images do not work with OIT, the cause seems to be that the transparent pixels are treated as background pixels.
Also There are some artifacts when working with Holdouts and DoF, this
is because the draw engines do not pass the correct alpha values.

Reviewers: fclem, brecht

Differential Revision: https://developer.blender.org/D4638

1 files changed, 0 insertions, 335 deletions

diff --git a/source/blender/editors/space_view3d/view3d_draw_legacy.c b/source/blender/editors/space_view3d/view3d_draw_legacy.c
index 08ac0d91d42..386c3164843 100644
--- a/source/blender/editors/space_view3d/view3d_draw_legacy.c
+++ b/source/blender/editors/space_view3d/view3d_draw_legacy.c
@@ -301,341 +301,6 @@ uint *ED_view3d_select_id_read(int xmin, int ymin, int xmax, int ymax, uint *r_b
   return buf;
 }
 
-/* ************************************************************* */
-
-static void view3d_stereo_bgpic_setup(Scene *scene, View3D *v3d, Image *ima, ImageUser *iuser)
-{
-  if (BKE_image_is_stereo(ima)) {
-    iuser->flag |= IMA_SHOW_STEREO;
-
-    if ((scene->r.scemode & R_MULTIVIEW) == 0) {
-      iuser->multiview_eye = STEREO_LEFT_ID;
-    }
-    else if (v3d->stereo3d_camera != STEREO_3D_ID) {
-      /* show only left or right camera */
-      iuser->multiview_eye = v3d->stereo3d_camera;
-    }
-
-    BKE_image_multiview_index(ima, iuser);
-  }
-  else {
-    iuser->flag &= ~IMA_SHOW_STEREO;
-  }
-}
-
-static void view3d_draw_bgpic(Scene *scene,
-                              Depsgraph *depsgraph,
-                              ARegion *ar,
-                              View3D *v3d,
-                              const bool do_foreground,
-                              const bool do_camera_frame)
-{
-  RegionView3D *rv3d = ar->regiondata;
-  int fg_flag = do_foreground ? CAM_BGIMG_FLAG_FOREGROUND : 0;
-  if (v3d->camera == NULL || v3d->camera->type != OB_CAMERA) {
-    return;
-  }
-  Camera *cam = v3d->camera->data;
-
-  for (CameraBGImage *bgpic = cam->bg_images.first; bgpic; bgpic = bgpic->next) {
-    if ((bgpic->flag & CAM_BGIMG_FLAG_FOREGROUND) != fg_flag) {
-      continue;
-    }
-
-    {
-      float image_aspect[2];
-      float x1, y1, x2, y2, centx, centy;
-
-      void *lock;
-
-      Image *ima = NULL;
-
-      /* disable individual images */
-      if ((bgpic->flag & CAM_BGIMG_FLAG_DISABLED)) {
-        continue;
-      }
-
-      ImBuf *ibuf = NULL;
-      ImBuf *freeibuf = NULL;
-      ImBuf *releaseibuf = NULL;
-      if (bgpic->source == CAM_BGIMG_SOURCE_IMAGE) {
-        ima = bgpic->ima;
-        if (ima == NULL) {
-          continue;
-        }
-
-        ImageUser iuser = bgpic->iuser;
-        iuser.scene = scene; /* Needed for render results. */
-        BKE_image_user_frame_calc(ima, &iuser, (int)DEG_get_ctime(depsgraph));
-        if (ima->source == IMA_SRC_SEQUENCE && !(iuser.flag & IMA_USER_FRAME_IN_RANGE)) {
-          ibuf = NULL; /* frame is out of range, dont show */
-        }
-        else {
-          view3d_stereo_bgpic_setup(scene, v3d, ima, &iuser);
-          ibuf = BKE_image_acquire_ibuf(ima, &iuser, &lock);
-          releaseibuf = ibuf;
-        }
-
-        image_aspect[0] = ima->aspx;
-        image_aspect[1] = ima->aspy;
-      }
-      else if (bgpic->source == CAM_BGIMG_SOURCE_MOVIE) {
-        /* TODO: skip drawing when out of frame range (as image sequences do above) */
-        MovieClip *clip = NULL;
-
-        if (bgpic->flag & CAM_BGIMG_FLAG_CAMERACLIP) {
-          if (scene->camera) {
-            clip = BKE_object_movieclip_get(scene, scene->camera, true);
-          }
-        }
-        else {
-          clip = bgpic->clip;
-        }
-
-        if (clip == NULL) {
-          continue;
-        }
-
-        BKE_movieclip_user_set_frame(&bgpic->cuser, (int)DEG_get_ctime(depsgraph));
-        ibuf = BKE_movieclip_get_ibuf(clip, &bgpic->cuser);
-
-        image_aspect[0] = clip->aspx;
-        image_aspect[1] = clip->aspy;
-
-        /* working with ibuf from image and clip has got different workflow now.
-         * ibuf acquired from clip is referenced by cache system and should
-         * be dereferenced after usage. */
-        freeibuf = ibuf;
-      }
-      else {
-        /* perhaps when loading future files... */
-        BLI_assert(0);
-        copy_v2_fl(image_aspect, 1.0f);
-      }
-
-      if (ibuf == NULL) {
-        continue;
-      }
-
-      if ((ibuf->rect == NULL && ibuf->rect_float == NULL) || ibuf->channels != 4) {
-        /* invalid image format */
-        if (freeibuf) {
-          IMB_freeImBuf(freeibuf);
-        }
-        if (releaseibuf) {
-          BKE_image_release_ibuf(ima, releaseibuf, lock);
-        }
-
-        continue;
-      }
-
-      if (ibuf->rect == NULL) {
-        IMB_rect_from_float(ibuf);
-      }
-
-      BLI_assert(rv3d->persp == RV3D_CAMOB);
-      {
-        if (do_camera_frame) {
-          rctf vb;
-          ED_view3d_calc_camera_border(scene, depsgraph, ar, v3d, rv3d, &vb, false);
-          x1 = vb.xmin;
-          y1 = vb.ymin;
-          x2 = vb.xmax;
-          y2 = vb.ymax;
-        }
-        else {
-          x1 = ar->winrct.xmin;
-          y1 = ar->winrct.ymin;
-          x2 = ar->winrct.xmax;
-          y2 = ar->winrct.ymax;
-        }
-
-        /* apply offset last - camera offset is different to offset in blender units */
-        /* so this has some sane way of working - this matches camera's shift _exactly_ */
-        {
-          const float max_dim = max_ff(x2 - x1, y2 - y1);
-          const float xof_scale = bgpic->offset[0] * max_dim;
-          const float yof_scale = bgpic->offset[1] * max_dim;
-
-          x1 += xof_scale;
-          y1 += yof_scale;
-          x2 += xof_scale;
-          y2 += yof_scale;
-        }
-
-        centx = (x1 + x2) * 0.5f;
-        centy = (y1 + y2) * 0.5f;
-
-        /* aspect correction */
-        if (bgpic->flag & CAM_BGIMG_FLAG_CAMERA_ASPECT) {
-          /* apply aspect from clip */
-          const float w_src = ibuf->x * image_aspect[0];
-          const float h_src = ibuf->y * image_aspect[1];
-
-          /* destination aspect is already applied from the camera frame */
-          const float w_dst = x1 - x2;
-          const float h_dst = y1 - y2;
-
-          const float asp_src = w_src / h_src;
-          const float asp_dst = w_dst / h_dst;
-
-          if (fabsf(asp_src - asp_dst) >= FLT_EPSILON) {
-            if ((asp_src > asp_dst) == ((bgpic->flag & CAM_BGIMG_FLAG_CAMERA_CROP) != 0)) {
-              /* fit X */
-              const float div = asp_src / asp_dst;
-              x1 = ((x1 - centx) * div) + centx;
-              x2 = ((x2 - centx) * div) + centx;
-            }
-            else {
-              /* fit Y */
-              const float div = asp_dst / asp_src;
-              y1 = ((y1 - centy) * div) + centy;
-              y2 = ((y2 - centy) * div) + centy;
-            }
-          }
-        }
-      }
-
-      /* complete clip? */
-      rctf clip_rect;
-      BLI_rctf_init(&clip_rect, x1, x2, y1, y2);
-      if (bgpic->rotation) {
-        BLI_rctf_rotate_expand(&clip_rect, &clip_rect, bgpic->rotation);
-      }
-
-      if (clip_rect.xmax < 0 || clip_rect.ymax < 0 || clip_rect.xmin > ar->winx ||
-          clip_rect.ymin > ar->winy) {
-        if (freeibuf) {
-          IMB_freeImBuf(freeibuf);
-        }
-        if (releaseibuf) {
-          BKE_image_release_ibuf(ima, releaseibuf, lock);
-        }
-
-        continue;
-      }
-
-      float zoomx = (x2 - x1) / ibuf->x;
-      float zoomy = (y2 - y1) / ibuf->y;
-
-      /* For some reason; zoom-levels down refuses to use GL_ALPHA_SCALE. */
-      if (zoomx < 1.0f || zoomy < 1.0f) {
-        float tzoom = min_ff(zoomx, zoomy);
-        int mip = 0;
-
-        if ((ibuf->userflags & IB_MIPMAP_INVALID) != 0) {
-          IMB_remakemipmap(ibuf, 0);
-          ibuf->userflags &= ~IB_MIPMAP_INVALID;
-        }
-        else if (ibuf->mipmap[0] == NULL) {
-          IMB_makemipmap(ibuf, 0);
-        }
-
-        while (tzoom < 1.0f && mip < 8 && ibuf->mipmap[mip]) {
-          tzoom *= 2.0f;
-          zoomx *= 2.0f;
-          zoomy *= 2.0f;
-          mip++;
-        }
-        if (mip > 0) {
-          ibuf = ibuf->mipmap[mip - 1];
-        }
-      }
-
-      GPU_depth_test(!do_foreground);
-      glDepthMask(GL_FALSE);
-
-      GPU_blend(true);
-      GPU_blend_set_func_separate(
-          GPU_SRC_ALPHA, GPU_ONE_MINUS_SRC_ALPHA, GPU_ONE, GPU_ONE_MINUS_SRC_ALPHA);
-
-      GPU_matrix_push_projection();
-      GPU_matrix_push();
-      ED_region_pixelspace(ar);
-
-      GPU_matrix_translate_2f(centx, centy);
-      GPU_matrix_scale_1f(bgpic->scale);
-      GPU_matrix_rotate_2d(RAD2DEGF(-bgpic->rotation));
-
-      if (bgpic->flag & CAM_BGIMG_FLAG_FLIP_X) {
-        zoomx *= -1.0f;
-        x1 = x2;
-      }
-      if (bgpic->flag & CAM_BGIMG_FLAG_FLIP_Y) {
-        zoomy *= -1.0f;
-        y1 = y2;
-      }
-
-      float col[4] = {1.0f, 1.0f, 1.0f, bgpic->alpha};
-      IMMDrawPixelsTexState state = immDrawPixelsTexSetup(GPU_SHADER_2D_IMAGE_COLOR);
-      immDrawPixelsTex(&state,
-                       x1 - centx,
-                       y1 - centy,
-                       ibuf->x,
-                       ibuf->y,
-                       GL_RGBA,
-                       GL_UNSIGNED_BYTE,
-                       GL_LINEAR,
-                       ibuf->rect,
-                       zoomx,
-                       zoomy,
-                       col);
-
-      GPU_matrix_pop_projection();
-      GPU_matrix_pop();
-
-      GPU_blend(false);
-
-      glDepthMask(GL_TRUE);
-      GPU_depth_test(true);
-
-      if (freeibuf) {
-        IMB_freeImBuf(freeibuf);
-      }
-      if (releaseibuf) {
-        BKE_image_release_ibuf(ima, releaseibuf, lock);
-      }
-    }
-  }
-}
-
-void ED_view3d_draw_bgpic_test(Scene *scene,
-                               Depsgraph *depsgraph,
-                               ARegion *ar,
-                               View3D *v3d,
-                               const bool do_foreground,
-                               const bool do_camera_frame)
-{
-  RegionView3D *rv3d = ar->regiondata;
-
-  if ((rv3d->persp == RV3D_CAMOB) && v3d->camera && (v3d->camera->type == OB_CAMERA)) {
-    Camera *cam = v3d->camera->data;
-    if ((cam->flag & CAM_SHOW_BG_IMAGE) == 0) {
-      return;
-    }
-  }
-  else {
-    return;
-  }
-
-  /* disabled - mango request, since footage /w only render is quite useful
-   * and this option is easy to disable all background images at once */
-#if 0
-  if (v3d->flag2 & V3D_HIDE_OVERLAYS) {
-    return;
-  }
-#endif
-
-  if ((rv3d->view == RV3D_VIEW_USER) || (rv3d->persp != RV3D_ORTHO)) {
-    if (rv3d->persp == RV3D_CAMOB) {
-      view3d_draw_bgpic(scene, depsgraph, ar, v3d, do_foreground, do_camera_frame);
-    }
-  }
-  else {
-    view3d_draw_bgpic(scene, depsgraph, ar, v3d, do_foreground, do_camera_frame);
-  }
-}
-
 /* *********************** */
 
 void view3d_update_depths_rect(ARegion *ar, ViewDepths *d, rcti *rect)