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// Memory
static void Memory_Copy(uint8 *Address_Write, uint8 *Address_Read, uint64 Size);
static void Arbitrary_Zero(uint8 *Address_Write, uint64 Size);
static void Arbitrary_SwapData(memory *Memory, uint8 *Address_0, uint8 *Address_1, uint64 Size);
static void Arbitrary_ShiftData(uint8 *Address_Start, uint8 *Address_End, uint64 ShiftAmount, int32 Direction);
void AV_Init(block_source *Source, av_info *AV, memory *Memory);
// Rudimentary guess-until-correct solver for bezier curves, used to evaluate
// the keyframe graph. Similar to the Catmull-Rom solver in CurvesSolver().
static real32 Bezier_SolveYForX(v2 Point_P0, v2 Point_P1, v2 Point_P2, v2 Point_P3, real32 TargetX);
static bezier_point * Bezier_LookupAddress(memory *Memory, property_channel *Property, uint16 Index, bool32 AssertExists = 1);
static bezier_point * Bezier_LookupAddress(memory *Memory, uint16 *Block_Bezier_Index, uint16 Index, bool32 AssertExists);
static void Bezier_Interact_Evaluate(project_state *State, bezier_point *PointAddress, v2 *Pos, real32 GraphZoomHeight = 1, real32 Y_Increment = 1);
// NOTE(fox): GraphZoomHeight and Y_Increment don't have to be specified if the Y value isn't needed, i.e. in Property_SortAll().
static void Bezier_Add(memory *Memory, memory_table_list TableName, property_channel *Property, bezier_point PointData, uint16 *ArrayLocation);
static void Bezier_Add(memory *Memory, memory_table_list TableName, uint16 *Block_Bezier_Index, uint16 *Block_Bezier_Count, uint16 *PointCount, bezier_point PointData);
static void
Render_UI(project_data *File, project_state *State, memory *Memory, ui *UI, ImDrawList *draw_list,
sorted_comp_array *SortedCompArray, sorted_layer_array *SortedLayerArray,
sorted_property_array *SortedPropertyStart, uint16 *SortedKeyframeArray, uint32 CompIndex, int32 Frame_Current);
static void *
Memory_Block_AddressAtIndex(memory *Memory, memory_table_list TableName, uint32 Index, bool32 AssertExists = 1);
static bool32
Block_Loop(memory *Memory, memory_table_list TableName, uint32 TotalCount, int *HasIncremented, int *CurrentCount, int *Index);
static void
File_SaveAs(project_data *File, project_state *State, memory *Memory, char *Filename);
static uint32
Bezier_Shape_Sort(memory *Memory, shape_layer *Shape, bezier_point *PointData,
project_state *State, layer_transforms T, int Width, int Height,
int CompWidth, int CompHeight, bool32 Interact);
void * Bezier_CubicCalcPoints(v2 p1, v2 p2, v2 p3, v2 p4, void *Data, uint32 Size);
static layer_transforms Transform_Inverse(layer_transforms T);
static v2 T_CompPosToLayerPos(layer_transforms T, uint32 FileWidth, uint32 FileHeight, uint32 SourceWidth, uint32 SourceHeight, real32 X, real32 Y);
inline void
ImGui_DrawCenteredRect(ImDrawList *draw_list, ImVec2 Point, real32 Width, uint32 col)
static void ImGui_ProcessInputs(project_data *File, project_state *State, ui *UI, memory *Memory, ImGuiIO io, sorted_file Sorted);
static void ImGui_PropertiesPanel(project_data *File, project_state *State, ui *UI, memory *Memory, ImGuiIO io, sorted_comp_array *SortedCompArray, sorted_layer_array *SortedLayerArray, sorted_property_array *SortedPropertyStart, uint16 *SortedKeyframeArray);
static void
ImGui_Viewport(project_data *File, project_state *State, ui *UI, memory *Memory, ImGuiIO io, GLuint textureID,
sorted_comp_array *SortedCompArray, sorted_layer_array *SortedLayerArray, sorted_property_array *SortedPropertyStart, uint16 *SortedKeyframeArray);
static void ImGui_Timeline(project_data *File, project_state *State, memory *Memory, ui *UI, ImGuiIO io, sorted_comp_array *SortedCompArray, sorted_layer_array *SortedLayerArray, sorted_property_array *SortedPropertyStart, uint16 *SortedKeyframeArray);
static void ImGui_File(project_data *File, project_state *State, memory *Memory, ImGuiIO io, sorted_comp_array *SortedCompArray, sorted_layer_array *SortedLayerArray);
static void ImGui_EffectsPanel(project_data *File, project_state *State, memory *Memory, ui *UI, ImGuiIO io);
static void ImGui_ColorPanel(project_data *File, project_state *State, ui *UI, memory *Memory, ImGuiIO io);
static void ImGui_Menu(project_data *File, project_state *State, ui *UI, memory *Memory, ImGuiIO io);
static void ImGui_Popups(project_data *File, project_state *State, ui *UI, memory *Memory, ImGuiIO io);
static void ImGui_KeybindUI(project_data *File, project_state *State, ui *UI, memory *Memory, ImGuiIO io);
#if DEBUG
static void ImGui_DebugMemoryViewer(memory *Memory, project_state *State);
static void ImGui_DebugRenderQueue(project_state *State);
static void ImGui_DebugUndoTree(memory *Memory, project_state *State);
#endif
#if SD
static void ImGui_SD_Thumbnail(project_data *File, project_state *State, ui *UI, memory *Memory, ImGuiIO io, sorted_comp_array *SortedCompArray, sorted_layer_array *SortedLayerArray, uint16 *SourceArray, uint16 SourceCount);
static void ImGui_SD_Prompt(project_data *File, project_state *State, ui *UI, memory *Memory, ImGuiIO io, sorted_comp_array *SortedCompArray, sorted_layer_array *SortedLayerArray);
#endif
// Widgets not involving drawing UI.
static v2 ImGui_ScreenPointToCompUV(ImVec2 ViewportMin, ImVec2 CompPos, ImVec2 CompZoom, ImVec2 MousePos);
static void ImGui_WarpMouse(project_state *State, ImVec2 MousePos, ImVec2 Min, ImVec2 Max, int Direction = 3);
static void ImGui_WarpMouseFinish(project_state *State, ImVec2 MousePos);
static ImVec2 ImGui_Brush_CalcMousePos(project_state *State, ImGuiIO &io, ImVec2 MouseDelta, int32 i, real32 DeltaDistance, real32 DeltaSlope);
static bool32 ImGui_TestBoxSelection_Point(ImVec2 Pos, ImGuiIO &io, bool32 *Test);
static void
Render_Main(project_data *File, project_state *State, memory *Memory, sorted_file Sorted, ui *UI, SDL_Window *window, GLuint textureID,
void *Data, void *OutputBuffer, render_type RenderType, rectangle RenderRegion);
static void Effect_Curves_Init(block_effect *Effect, property_channel *Property);
void AV_IsFileSupported(char *filename, bool32 *IsVideo, bool32 *HasAudio);
static v2 T_CompUVToLayerUV(layer_transforms T, uint32 FileWidth, uint32 FileHeight, uint32 SourceWidth, uint32 SourceHeight, v2 CompUV);
static header_effect* Effect_EntryFromID(project_state *State, char *ID);
void Effect_Curves_Sort(memory *Memory, block_effect *Effect, uint16 *SortedPointStart, uint16 Which);
inline v2 Effect_V2(memory *Memory, block_effect *Effect, int Offset);
static void Interact_Transform_Begin(project_data *File, memory *Memory, project_state *State, ImVec2 OGPos, sorted_comp_array *SortedCompArray, sorted_layer_array *SortedLayerArray);
static v2 Transform_ScreenSpaceToLocal(layer_transforms T, uint32 FileWidth, uint32 FileHeight, uint32 SourceWidth, uint32 SourceHeight, ImVec2 CompPos, ImVec2 CompZoom, ImVec2 ViewportMin, ImVec2 Point);
static ImVec2 Layer_LocalToScreenSpace(project_state *State, memory *Memory, block_layer *Layer, ui *UI, uint32 PrincipalCompIndex, v2 Point);
static v2 TransformPoint(layer_transforms T, real32 Width, real32 Height, v2 Point);
static void Layer_GetDimensions(memory *Memory, block_layer *Layer, int *Width, int *Height);
static void * Memory_PushScratch(memory *Memory, uint64 Size);
static void Memory_PopScratch(memory *Memory, uint64 Size);
void Bitmap_SwapData(uint8 *Address_0, uint8 *Address_1, uint64 Size, uint16 BytesPerPixel);
void GL_DeleteHWBuffer(gl_effect_layer *Test);
void GL_UpdateTexture(gl_effect_layer *Test, void *Data, uint16 Width, uint16 Height, uint16 BytesPerPixel, bool32 Multisample);
static void Transform_ApplyInteractive(interact_transform Interact, real32 *OutputX, real32 *OutputY, real32 *OutputRotation, real32 *OutputScale);
static layer_transforms Layer_GetTransforms(block_layer *Layer);
void GL_GenAndBindTexture(GLuint *GLTexture, int Width, int Height, int BytesPerPixel, void *BufferAddress);
static real32 Bezier_SolveYForX(v2 Point_P0, v2 Point_P1, v2 Point_P2, v2 Point_P3, real32 X);
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