/* 
A* -------------------------------------------------------------------
B* This file contains source code for the PyMOL computer program
C* copyright 1998-2000 by Warren Lyford Delano of DeLano Scientific. 
D* -------------------------------------------------------------------
E* It is unlawful to modify or remove this copyright notice.
F* -------------------------------------------------------------------
G* Please see the accompanying LICENSE file for further information. 
H* -------------------------------------------------------------------
I* Additional authors of this source file include:
-* 
-* 
-*
Z* -------------------------------------------------------------------
*/

#ifndef _H_Scene
#define _H_Scene

#include"Base.h"
#include"PyMOLObject.h"
#include"Ortho.h"
#include"View.h"
#include"Result.h"
#include"SceneView.h"
#include"SceneDef.h"
#include"SceneRender.h"
#include"ShaderMgr.h"
#include"pymol/zstring_view.h"

#include <vector>

#define SDOF_NORMAL_MODE 0
#define SDOF_CLIP_MODE 1
#define SDOF_DRAG_MODE 2

// TODO: define remaining cSceneRay_MODEs (VRML, COLLADA, etc.)
#define cSceneRay_MODE_IDTF 7

#define cSceneImage_Default -1
#define cSceneImage_Normal 0
#define cSceneImage_Draw 1
#define cSceneImage_Ray 2

#define SceneScrollBarMargin DIP2PIXEL(1)
#define SceneScrollBarWidth DIP2PIXEL(13)
#define SceneGetExactScreenVertexScale SceneGetScreenVertexScale

enum class SceneClipMode {
  Invalid = -1,
  Near = 0,
  Far = 1,
  Move = 2,
  Slab = 3,
  Atoms = 4,
  Scaling = 5,
  Proportional = 6,
  Linear = 7,
  Near_Set = 8,
  Far_Set = 9,
};

float SceneGetDynamicLineWidth(RenderInfo * info, float line_width);
void SceneInvalidateStencil(PyMOLGlobals * G);
int SceneHasImage(PyMOLGlobals * G);
int SceneInit(PyMOLGlobals * G);
void SceneUpdate(PyMOLGlobals * G, int force);
int SceneRenderCached(PyMOLGlobals * G);
int SceneSetFog(PyMOLGlobals *G);
void SceneSetFogUniforms(PyMOLGlobals * G, CShaderPrg *);
void SceneSetFrame(PyMOLGlobals * G, int mode, int frame);
int SceneGetFrame(PyMOLGlobals * G);
int SceneGetState(PyMOLGlobals * G);

void SceneDirty(PyMOLGlobals * G);      /* scene dirty, but leave the overlay if one exists */
void SceneInvalidate(PyMOLGlobals * G); /* scene dirty and remove the overlay */
void SceneChanged(PyMOLGlobals * G);    /* update 3D objects */

int SceneCountFrames(PyMOLGlobals * G);
int SceneGetNFrame(PyMOLGlobals * G, int *has_movie=nullptr);
void SceneSetMatrix(PyMOLGlobals * G, float *);
float *SceneGetMatrix(PyMOLGlobals * G);

float *SceneGetPmvMatrix(PyMOLGlobals * G);

float SceneGetScreenVertexScale(PyMOLGlobals * G, const float *v1);
bool SceneGetVisible(PyMOLGlobals * G, const float *v1);
float SceneGetDepth(PyMOLGlobals * G, const float *v1);
float SceneGetRawDepth(PyMOLGlobals * G, const float *v1);

void SceneIdle(PyMOLGlobals * G);
void SceneFree(PyMOLGlobals * G);

int SceneGetDrawFlagGrid(PyMOLGlobals * G, GridInfo * grid, int slot);
int SceneDeferRay(PyMOLGlobals * G,
                  int ray_width,
                  int ray_height,
                  int mode,
                  float angle, float shift, int quiet, int show_timing, int antialias);
int SceneMakeMovieImage(PyMOLGlobals * G,
    int show_timing, int validate, int mode,
    int width=0, int height=0);
int SceneValidateImageMode(PyMOLGlobals * G, int mode, bool defaultdraw);

bool ScenePNG(PyMOLGlobals* G, pymol::zstring_view png, float dpi, int quiet,
    int prior_only, int format, std::vector<unsigned char>* outbuf = nullptr);
int SceneCopyExternal(PyMOLGlobals * G, int width, int height, int rowbytes,
                      unsigned char *dest, int mode);

void SceneResetMatrix(PyMOLGlobals * G);

void SceneRestartFrameTimer(PyMOLGlobals * G);

void SceneGetEyeNormal(PyMOLGlobals * G, float *v1, float *normal);

void SceneRotateAxis(PyMOLGlobals * G, float angle, char axis);
void SceneRotate(
    PyMOLGlobals* G, float angle, float x, float y, float z, bool dirty = true);
void SceneTranslate(PyMOLGlobals * G, float x, float y, float z);

void SceneTranslateScaled(PyMOLGlobals * G, float x, float y, float z, int sdof_mode);
void SceneRotateScaled(PyMOLGlobals * G, float rx, float ry, float rz, int sdof_mode);

void SceneClip(PyMOLGlobals * G, SceneClipMode plane, float movement, const char *sele, int state);
pymol::Result<> SceneClipFromMode(PyMOLGlobals* G, pymol::zstring_view mode, float movement,
    pymol::zstring_view sele, int state);
pymol::Result<std::pair<float, float>> SceneGetClip(PyMOLGlobals* G);
std::pair<int, int> SceneGetImageSize(PyMOLGlobals * G);
float SceneGetGridAspectRatio(PyMOLGlobals * G);
void SceneScale(PyMOLGlobals * G, float scale);
void SceneResetNormalCGO(PyMOLGlobals * G, CGO *cgo, int lines);
void SceneResetNormal(PyMOLGlobals * G, int lines);
void SceneResetNormalUseShader(PyMOLGlobals * G, int lines, short use_shader);
void SceneResetNormalToViewVector(PyMOLGlobals * G, short use_shader);
void SceneResetNormalUseShaderAttribute(PyMOLGlobals * G, int lines, short use_shader, int attr);
void SceneGetResetNormal(PyMOLGlobals * G, float *normal, int lines);

int SceneObjectAdd(PyMOLGlobals * G, pymol::CObject* obj);
int SceneObjectDel(PyMOLGlobals * G, pymol::CObject* obj, int allow_purge);

/**
 * @brief removes object from Scene
 * @param obj Object to be removed
 * @return if Object removed--always true if obj==nullptr
 */

bool SceneObjectRemove(PyMOLGlobals* G, pymol::CObject* obj);
int SceneObjectIsActive(PyMOLGlobals* G, pymol::CObject* obj);
void SceneOriginSet(PyMOLGlobals * G, const float *origin, int preserve);
void SceneOriginGet(PyMOLGlobals * G, float *origin);
void SceneWindowSphere(PyMOLGlobals * G, const float *location, float radius);
void SceneRelocate(PyMOLGlobals * G, const float *location);
Block *SceneGetBlock(PyMOLGlobals * G);
void SceneApplyMatrix(PyMOLGlobals * G, float *m);
void SceneSetStereo(PyMOLGlobals * G, bool flag);
int SceneGetStereo(PyMOLGlobals * G);
void SceneDontCopyNext(PyMOLGlobals * G);
void SceneGetViewNormal(PyMOLGlobals * G, float *v);
void SceneClipSet(PyMOLGlobals * G, float front, float back);
void SceneGetView(PyMOLGlobals * G, SceneViewType view);
void SceneSetView(PyMOLGlobals * G, const SceneViewType view,
                  int quiet, float animate, int hand);
void SceneRestartSweepTimer(PyMOLGlobals * G);
int SceneViewEqual(SceneViewType left, SceneViewType right);
void SceneToViewElem(PyMOLGlobals * G, CViewElem * elem, const char *scene_name);
void SceneFromViewElem(PyMOLGlobals * G, CViewElem * elem, int dirty);
void SceneGetCenter(PyMOLGlobals * G, float *pos);
void SceneGetWidthHeight(PyMOLGlobals * G, int *width, int *height);
Extent2D SceneGetExtentStereo(PyMOLGlobals* G);
void SceneInvalidateCopy(PyMOLGlobals * G, int free_buffer);

void SceneSetCardInfo(PyMOLGlobals * G, const char *vendor, const char *renderer, const char *version);
void SceneGetCardInfo(PyMOLGlobals * G, char **vendor, char **renderer, char **version);
int SceneLoadPNG(PyMOLGlobals * G, const char *fname, int movie_flag, int stereo, int quiet);

void SceneSetDefaultView(PyMOLGlobals * G);
void SceneRovingDirty(PyMOLGlobals * G);
int SceneRovingCheckDirty(PyMOLGlobals * G);
void SceneRovingUpdate(PyMOLGlobals * G);
void SceneRovingChanged(PyMOLGlobals * G);
void SceneRovingPostpone(PyMOLGlobals * G);
int SceneReinitialize(PyMOLGlobals * G);
void SceneUpdateStereoMode(PyMOLGlobals * G);
void SceneSuppressMovieFrame(PyMOLGlobals * G);
int SceneDeferClick(Block * block, int button, int x, int y, int mod);
int SceneDeferDrag(Block * block, int x, int y, int mod);

/**
 * If we have a current OpenGL context, render the image immediately.
 * Otherwise, defer the rendering.
 *
 * @param extent requested extent in Pixels
 * @param filename image filename
 * @param antialias antialiasing level (via Supersampling not via shader)
 * @param dpi image resolution in dots per inch
 * @param format image format
 * @param quiet suppress messages
 * @param[out] out_img image data
 * @return true if rendering was deferred, false if it was rendered immediately.
 */
bool SceneDeferImage(PyMOLGlobals* G, const Extent2D& extent,
    const char* filename, int antialias, float dpi, int format, int quiet,
    pymol::Image* out_img);
const char *SceneGetSeleModeKeyword(PyMOLGlobals * G);
void SceneUpdateStereo(PyMOLGlobals * G);
float ScenePushRasterMatrix(PyMOLGlobals * G, float *v);
void ScenePopRasterMatrix(PyMOLGlobals * G);
void ScenePrimeAnimation(PyMOLGlobals * G);
void SceneLoadAnimation(PyMOLGlobals * G, double duration, int hand);
int SceneMustDrawBoth(PyMOLGlobals * G);
float SceneGetReflectScaleValue(PyMOLGlobals * G, int limit = 8);
float SceneGetSpecularValue(PyMOLGlobals * G, float spec, int limit = 8);

void SceneGetAdjustedLightValues(PyMOLGlobals * G,
    float *ptr_spec,
    float *ptr_spec_power,
    float *ptr_spec_direct,
    float *ptr_spec_direct_power,
    int limit = 8);

void SceneAbortAnimation(PyMOLGlobals * G);
void SceneObjectUpdateThread(CObjectUpdateThreadInfo * T);
int SceneCaptureWindow(PyMOLGlobals * G);

void SceneZoom(PyMOLGlobals * G, float scale);

int SceneGetTwoSidedLighting(PyMOLGlobals * G);
int SceneGetTwoSidedLightingSettings(PyMOLGlobals * G, const CSetting *set1, const CSetting *set2);

float SceneGetLineWidthForCylinders(PyMOLGlobals * G, RenderInfo * info, float line_width);
float SceneGetLineWidthForCylindersStatic(PyMOLGlobals * G, RenderInfo * info, float dynamic_line_width_arg, float line_width);

void ScenePushModelViewMatrix(PyMOLGlobals * G);
void ScenePopModelViewMatrix(PyMOLGlobals * G, bool);

glm::mat4& SceneGetModelViewMatrix(PyMOLGlobals * G);
float* SceneGetModelViewMatrixPtr(PyMOLGlobals* G);
glm::mat4& SceneGetProjectionMatrix(PyMOLGlobals* G);
float* SceneGetProjectionMatrixPtr(PyMOLGlobals* G);
void SceneSetBackgroundColorAlreadySet(PyMOLGlobals * G, int);
int SceneGetBackgroundColorAlreadySet(PyMOLGlobals * G);
void SceneSetDoNotClearBackground(PyMOLGlobals * G, int);
int SceneGetDoNotClearBackground(PyMOLGlobals * G);

void SceneProgramLighting(PyMOLGlobals * G, CShaderPrg * shaderPrg = nullptr);
void SceneGLClear(PyMOLGlobals * G, GLbitfield mask);

void SceneUpdateAnimation(PyMOLGlobals * G);

void SceneSetupGLPicking(PyMOLGlobals * G);

int SceneDrawImageOverlay(PyMOLGlobals * G, int override  , CGO *orthoCGO);

int SceneIncrementTextureRefreshes(PyMOLGlobals * G);

void SceneResetTextureRefreshes(PyMOLGlobals * G);

void SceneGetScaledAxes(
    PyMOLGlobals* G, pymol::CObject* obj, float* xn, float* yn);
void SceneGetScaledAxesAtPoint(PyMOLGlobals * G, float *pt, float *xn, float *yn);

int SceneGetCopyType(PyMOLGlobals * G);

void SceneGenerateMatrixToAnotherZFromZ(PyMOLGlobals *G, float *convMatrix, float *curpt, float *pt);
void SceneAdjustZtoScreenZ(PyMOLGlobals *G, float *pos, float z);
float SceneGetCurrentBackSafe(PyMOLGlobals *G);
float SceneGetCurrentFrontSafe(PyMOLGlobals *G);
void SceneSetPointToWorldScreenRelative(PyMOLGlobals *G, float *pos, float *screenPt);

int StereoIsAdjacent(PyMOLGlobals * G);

/**
 * Retrieves number of slot in grid
 * @param grid_mode grid mode
 * @return number of slots in grid
 */
int SceneGetGridSize(PyMOLGlobals* G, GridMode grid_mode);

/**
 * Updates the Grid slot extents
 * @param I grid to update
 * @param asp_ratio aspect ratio of screen to display grid
 * @param grid_mode grid mode
 * @param size size of grid
 */
void GridUpdate(GridInfo* I, float asp_ratio, GridMode mode, int size);
Rect2D GridSetRayViewport(GridInfo& I, int slot);
int SceneGetDrawFlag(GridInfo * grid, int *slot_vla, int slot);

void SceneApplyImageGamma(PyMOLGlobals * G, unsigned int *buffer, int width,
                          int height);
SceneUnitContext ScenePrepareUnitContext(const Extent2D& extent);

float GetFovWidth(PyMOLGlobals * G);

void ScenePrepareMatrix(PyMOLGlobals * G, int mode, int stereo_mode = 0);

/**
 * @brief copies the pixels rendered to the scene to Scene::Image
 * @param config framebuffer to copy from
 * @param force force copying
 * @param entire_window copy entire window
 */
void SceneCopy(PyMOLGlobals * G, GLFramebufferConfig config, int force, int entire_window);

// FIXME use pymol matrices
void SceneGetModel2WorldMatrix(PyMOLGlobals * G, float *matrix);
void SceneSetModel2WorldMatrix(PyMOLGlobals * G, float const *matrix);
float SceneGetScale(PyMOLGlobals * G);

void ScenePickAtomInWorld(PyMOLGlobals * G, int x, int y, float *atomWorldPos);

void SceneInvalidatePicking(PyMOLGlobals * G);

pymol::Image* SceneImagePrepare(PyMOLGlobals * G, bool prior_only);

void SceneDoRoving(PyMOLGlobals * G, float old_front,
                   float old_back, float old_origin,
                   int adjust_flag, int zoom_flag);
void UpdateFrontBackSafe(CScene *I);
int stereo_via_adjacent_array(int stereo_mode);

std::shared_ptr<pymol::Image> SceneGetSharedImage(PyMOLGlobals* G);

/**
 * Creates a sized image of the current workspace
 * @width width of the image
 * @height height of the image
 * @antialias antialiasing level
 * @excludeSelections exclude selections from the image
 * @renderWhich renders classes of objects to the image
*/
pymol::Result<> SceneMakeSizedImage(PyMOLGlobals* G, Extent2D extent,
    int antialias, bool excludeSelections,
    SceneRenderWhich renderWhich = SceneRenderWhich::All);

void SceneSetViewport(PyMOLGlobals* G, const Rect2D& rect);
void SceneSetViewport(PyMOLGlobals* G, int x, int y, int width, int height);
Rect2D SceneGetViewport(PyMOLGlobals* G);

/**
 * Get the maximum dimensions of the viewport
 * @return the maximum dimensions of OpenGL viewport
 */
Extent2D SceneGLGetMaxDimensions(PyMOLGlobals* G);

/**
 * @return Retrieves the Scene's rect extent
 */
Extent2D SceneGetExtent(PyMOLGlobals* G);

/**
 * @brief Sets the Scene's layout rect
 * @param extent Scene's layout rect
 */
void SceneSetExtent(PyMOLGlobals* G, const Extent2D& extent);

/**
 * @brief Retrieves the Scene's layout rect
 * @return Scene's layout rect
 */
Rect2D SceneGetRect(PyMOLGlobals* G);

float SceneGetAspectRatio(PyMOLGlobals* G);

GLFramebufferConfig SceneDrawBothGetConfig(PyMOLGlobals* G);

/**
 * Clamps the extent to the maximum dimensions
 * @param extent the extent to clamp
 * @param maxDim the maximum dimensions
 * @return the clamped extent (scaled to keep aspect ratio if exceed max)
 */
Extent2D ExtentClampByAspectRatio(Extent2D extent, const Extent2D& maxDim);

struct UpscaledExtentInfo
{
  Extent2D extent;
  int factor;
  int shift;
};

/**
 * @brief Returns scaling information for super-sampled antialias
 * @param extent the extent to upscale
 * @param maxExtent the maximum extent (typically max of viewport)
 * @param antialias the antialiasing factor
 * @note max upscaling is 4X
 */
UpscaledExtentInfo ExtentGetUpscaleInfo(
    PyMOLGlobals* G, Extent2D extent, const Extent2D& maxExtent, int antialias);

/**
 * @brief Copies a portion of a pymol::Image onto another
 * @param srcImage source image
 * @param dstImage destination image
 * @param srcRect source rectangle
 * @param dstRect destination rectangle
 */
void PyMOLImageCopy(const pymol::Image& srcImage,
    pymol::Image& dstImage, const Rect2D& srcRect, const Rect2D& dstRect);

/**
 * @brief Returns a CPU image copy of the framebuffer attachment
 * @param config framebuffer configuration
 * @param srcRect source Rect from GL buffer to copy from
 * @return CPU image copy of the framebuffer attachment/buffer
 */
pymol::Image GLImageToPyMOLImage(
    PyMOLGlobals* G, const GLFramebufferConfig& config, const Rect2D& srcRect);

#endif