From 3ccdc362dad3ddfa8e4c752c58408a6b64c7b2f2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cle=CC=81ment=20Foucault?= <foucault.clem@gmail.com>
Date: Sat, 14 May 2022 20:29:28 +0200
Subject: EEVEE-Next: Add camera module

---
 .../draw/engines/eevee_next/eevee_camera.cc        | 146 +++++++++++++++++++++
 1 file changed, 146 insertions(+)
 create mode 100644 source/blender/draw/engines/eevee_next/eevee_camera.cc

(limited to 'source/blender/draw/engines/eevee_next/eevee_camera.cc')

diff --git a/source/blender/draw/engines/eevee_next/eevee_camera.cc b/source/blender/draw/engines/eevee_next/eevee_camera.cc
new file mode 100644
index 00000000000..3a7c42cd018
--- /dev/null
+++ b/source/blender/draw/engines/eevee_next/eevee_camera.cc
@@ -0,0 +1,146 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ * Copyright 2021 Blender Foundation.
+ */
+
+/** \file
+ * \ingroup eevee
+ */
+
+#include <array>
+
+#include "DRW_render.h"
+
+#include "DNA_camera_types.h"
+#include "DNA_view3d_types.h"
+
+#include "BKE_camera.h"
+#include "DEG_depsgraph_query.h"
+#include "RE_pipeline.h"
+
+#include "eevee_camera.hh"
+#include "eevee_instance.hh"
+
+namespace blender::eevee {
+
+/* -------------------------------------------------------------------- */
+/** \name Camera
+ * \{ */
+
+void Camera::init()
+{
+  const Object *camera_eval = inst_.camera_eval_object;
+  synced_ = false;
+  data_.swap();
+
+  CameraData &data = data_.current();
+
+  if (camera_eval) {
+    const ::Camera *cam = reinterpret_cast<const ::Camera *>(camera_eval->data);
+    switch (cam->type) {
+      default:
+      case CAM_PERSP:
+        data.type = CAMERA_PERSP;
+      case CAM_ORTHO:
+        data.type = CAMERA_ORTHO;
+#if 0 /* TODO(fclem): Make fisheye properties inside blender. */
+      case CAM_PANO: {
+        switch (cam->panorama_type) {
+          default:
+          case CAM_PANO_EQUIRECTANGULAR:
+            data.type = CAMERA_PANO_EQUIRECT;
+          case CAM_PANO_FISHEYE_EQUIDISTANT:
+            data.type = CAMERA_PANO_EQUIDISTANT;
+          case CAM_PANO_FISHEYE_EQUISOLID:
+            data.type = CAMERA_PANO_EQUISOLID;
+          case CAM_PANO_MIRRORBALL:
+            data.type = CAMERA_PANO_MIRROR;
+        }
+      }
+#endif
+    }
+  }
+  else if (inst_.drw_view) {
+    data.type = DRW_view_is_persp_get(inst_.drw_view) ? CAMERA_PERSP : CAMERA_ORTHO;
+  }
+  else {
+    /* Lightprobe baking. */
+    data.type = CAMERA_PERSP;
+  }
+}
+
+void Camera::sync()
+{
+  const Object *camera_eval = inst_.camera_eval_object;
+  CameraData &data = data_.current();
+
+  data.filter_size = inst_.scene->r.gauss;
+
+  if (inst_.drw_view) {
+    DRW_view_viewmat_get(inst_.drw_view, data.viewmat.ptr(), false);
+    DRW_view_viewmat_get(inst_.drw_view, data.viewinv.ptr(), true);
+    DRW_view_winmat_get(inst_.drw_view, data.winmat.ptr(), false);
+    DRW_view_winmat_get(inst_.drw_view, data.wininv.ptr(), true);
+    DRW_view_persmat_get(inst_.drw_view, data.persmat.ptr(), false);
+    DRW_view_persmat_get(inst_.drw_view, data.persinv.ptr(), true);
+    DRW_view_camtexco_get(inst_.drw_view, data.uv_scale);
+  }
+  else if (inst_.render) {
+    /* TODO(fclem) Overscan */
+    // RE_GetCameraWindowWithOverscan(inst_.render->re, g_data->overscan, data.winmat);
+    RE_GetCameraWindow(inst_.render->re, camera_eval, data.winmat.ptr());
+    RE_GetCameraModelMatrix(inst_.render->re, camera_eval, data.viewinv.ptr());
+    invert_m4_m4(data.viewmat.ptr(), data.viewinv.ptr());
+    invert_m4_m4(data.wininv.ptr(), data.winmat.ptr());
+    mul_m4_m4m4(data.persmat.ptr(), data.winmat.ptr(), data.viewmat.ptr());
+    invert_m4_m4(data.persinv.ptr(), data.persmat.ptr());
+    data.uv_scale = float2(1.0f);
+    data.uv_bias = float2(0.0f);
+  }
+  else {
+    data.viewmat = float4x4::identity();
+    data.viewinv = float4x4::identity();
+    perspective_m4(data.winmat.ptr(), -0.1f, 0.1f, -0.1f, 0.1f, 0.1f, 1.0f);
+    data.wininv = data.winmat.inverted();
+    data.persmat = data.winmat * data.viewmat;
+    data.persinv = data.persmat.inverted();
+  }
+
+  if (camera_eval) {
+    const ::Camera *cam = reinterpret_cast<const ::Camera *>(camera_eval->data);
+    data.clip_near = cam->clip_start;
+    data.clip_far = cam->clip_end;
+#if 0 /* TODO(fclem): Make fisheye properties inside blender. */
+    data.fisheye_fov = cam->fisheye_fov;
+    data.fisheye_lens = cam->fisheye_lens;
+    data.equirect_bias.x = -cam->longitude_min + M_PI_2;
+    data.equirect_bias.y = -cam->latitude_min + M_PI_2;
+    data.equirect_scale.x = cam->longitude_min - cam->longitude_max;
+    data.equirect_scale.y = cam->latitude_min - cam->latitude_max;
+    /* Combine with uv_scale/bias to avoid doing extra computation. */
+    data.equirect_bias += data.uv_bias * data.equirect_scale;
+    data.equirect_scale *= data.uv_scale;
+
+    data.equirect_scale_inv = 1.0f / data.equirect_scale;
+#endif
+  }
+  else if (inst_.drw_view) {
+    data.clip_near = DRW_view_near_distance_get(inst_.drw_view);
+    data.clip_far = DRW_view_far_distance_get(inst_.drw_view);
+    data.fisheye_fov = data.fisheye_lens = -1.0f;
+    data.equirect_bias = float2(0.0f);
+    data.equirect_scale = float2(0.0f);
+  }
+
+  data_.current().push_update();
+
+  synced_ = true;
+
+  /* Detect changes in parameters. */
+  if (data_.current() != data_.previous()) {
+    // inst_.sampling.reset();
+  }
+}
+
+/** \} */
+
+}  // namespace blender::eevee
-- 
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