EEVEE-Next: Add camera module

1 files changed, 86 insertions, 2 deletions

diff --git a/source/blender/draw/engines/eevee_next/eevee_camera.hh b/source/blender/draw/engines/eevee_next/eevee_camera.hh
index 3db343703e0..dfec738b1f3 100644
--- a/source/blender/draw/engines/eevee_next/eevee_camera.hh
+++ b/source/blender/draw/engines/eevee_next/eevee_camera.hh
@@ -1,11 +1,14 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later
- * Copyright 2021 Blender Foundation.
- */
+ * Copyright 2021 Blender Foundation. */
+
+#pragma once
 
 /** \file
  * \ingroup eevee
  */
 
+#include "eevee_shader_shared.hh"
+
 namespace blender::eevee {
 
 class Instance;
@@ -43,4 +46,85 @@ static const float cubeface_mat[6][4][4] = {
      {0.0f, 0.0f, 0.0f, 1.0f}},
 };
 
+inline void cubeface_winmat_get(float4x4 &winmat, float near, float far)
+{
+  /* Simple 90° FOV projection. */
+  perspective_m4(winmat.ptr(), -near, near, -near, near, near, far);
+}
+
+/* -------------------------------------------------------------------- */
+/** \name CameraData operators
+ * \{ */
+
+inline bool operator==(const CameraData &a, const CameraData &b)
+{
+  return compare_m4m4(a.persmat.ptr(), b.persmat.ptr(), FLT_MIN) && (a.uv_scale == b.uv_scale) &&
+         (a.uv_bias == b.uv_bias) && (a.equirect_scale == b.equirect_scale) &&
+         (a.equirect_bias == b.equirect_bias) && (a.fisheye_fov == b.fisheye_fov) &&
+         (a.fisheye_lens == b.fisheye_lens) && (a.filter_size == b.filter_size) &&
+         (a.type == b.type);
+}
+
+inline bool operator!=(const CameraData &a, const CameraData &b)
+{
+  return !(a == b);
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name Camera
+ * \{ */
+
+/**
+ * Point of view in the scene. Can be init from viewport or camera object.
+ */
+class Camera {
+ private:
+  Instance &inst_;
+
+  /** Double buffered to detect changes and have history for re-projection. */
+  SwapChain<CameraDataBuf, 2> data_;
+  /** Detects wrong usage. */
+  bool synced_ = false;
+
+ public:
+  Camera(Instance &inst) : inst_(inst){};
+  ~Camera(){};
+
+  void init();
+  void sync();
+
+  /**
+   * Getters
+   **/
+  const CameraData &data_get() const
+  {
+    BLI_assert(synced_);
+    return data_.current();
+  }
+  const GPUUniformBuf *ubo_get() const
+  {
+    return data_.current();
+  }
+  bool is_panoramic() const
+  {
+    return eevee::is_panoramic(data_.current().type);
+  }
+  bool is_orthographic() const
+  {
+    return data_.current().type == CAMERA_ORTHO;
+  }
+  const float3 &position() const
+  {
+    return *reinterpret_cast<const float3 *>(data_.current().viewinv[3]);
+  }
+  const float3 &forward() const
+  {
+    return *reinterpret_cast<const float3 *>(data_.current().viewinv[2]);
+  }
+};
+
+/** \} */
+
 }  // namespace blender::eevee