164 lines
3.5 KiB
C
164 lines
3.5 KiB
C
#if !defined(HANDMADE_RENDER_GROUP_H)
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/* ========================================================================
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$File: $
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$Date: $
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$Revision: $
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$Creator: Casey Muratori $
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$Notice: (C) Copyright 2015 by Molly Rocket, Inc. All Rights Reserved. $
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======================================================================== */
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/* NOTE(casey):
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1) Everywhere outside the renderer, Y _always_ goes upward, X to the right.
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2) All bitmaps including the render target are assumed to be bottom-up
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(meaning that the first row pointer points to the bottom-most row
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when viewed on screen).
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3) It is mandatory that all inputs to the renderer are in world
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coordinates ("meters"), NOT pixels. If for some reason something
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absolutely has to be specified in pixels, that will be explicitly
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marked in the API, but this should occur exceedingly sparingly.
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4) Z is a special coordinate because it is broken up into discrete slices,
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and the renderer actually understands these slices. Z slices are what
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control the _scaling_ of things, whereas Z offsets inside a slice are
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what control Y offsetting.
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5) All color values specified to the renderer as V4's are in
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NON-premulitplied alpha.
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*/
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struct loaded_bitmap
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{
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void *Memory;
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v2 AlignPercentage;
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r32 WidthOverHeight;
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s32 Width;
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s32 Height;
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// TODO(casey): Get rid of pitch!
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s32 Pitch;
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};
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struct environment_map
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{
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loaded_bitmap LOD[4];
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real32 Pz;
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};
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enum render_group_entry_type
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{
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RenderGroupEntryType_render_entry_clear,
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RenderGroupEntryType_render_entry_bitmap,
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RenderGroupEntryType_render_entry_rectangle,
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RenderGroupEntryType_render_entry_coordinate_system,
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};
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struct render_group_entry_header
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{
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render_group_entry_type Type;
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};
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struct render_entry_clear
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{
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v4 Color;
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};
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struct render_entry_saturation
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{
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real32 Level;
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};
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struct render_entry_bitmap
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{
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loaded_bitmap *Bitmap;
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v4 Color;
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v2 P;
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v2 Size;
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};
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struct render_entry_rectangle
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{
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v4 Color;
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v2 P;
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v2 Dim;
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};
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// NOTE(casey): This is only for test:
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// {
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struct render_entry_coordinate_system
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{
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v2 Origin;
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v2 XAxis;
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v2 YAxis;
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v4 Color;
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loaded_bitmap *Texture;
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loaded_bitmap *NormalMap;
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// real32 PixelsToMeters; // TODO(casey): Need to store this for lighting!
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environment_map *Top;
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environment_map *Middle;
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environment_map *Bottom;
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};
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// }
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struct render_transform
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{
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bool32 Orthographic;
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// NOTE(casey): Camera parameters
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real32 MetersToPixels; // NOTE(casey): This translates meters _on the monitor_ into pixels _on the monitor_
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v2 ScreenCenter;
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real32 FocalLength;
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real32 DistanceAboveTarget;
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v3 OffsetP;
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real32 Scale;
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};
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struct render_group
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{
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struct game_assets *Assets;
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real32 GlobalAlpha;
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u32 GenerationID;
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v2 MonitorHalfDimInMeters;
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render_transform Transform;
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uint32 MaxPushBufferSize;
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uint32 PushBufferSize;
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uint8 *PushBufferBase;
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uint32 MissingResourceCount;
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b32 RendersInBackground;
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b32 InsideRender;
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};
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struct entity_basis_p_result
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{
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v2 P;
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real32 Scale;
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bool32 Valid;
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};
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struct used_bitmap_dim
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{
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entity_basis_p_result Basis;
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v2 Size;
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v2 Align;
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v3 P;
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};
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void DrawRectangleQuickly(loaded_bitmap *Buffer, v2 Origin, v2 XAxis, v2 YAxis, v4 Color,
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loaded_bitmap *Texture, real32 PixelsToMeters,
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rectangle2i ClipRect, bool32 Even);
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#define HANDMADE_RENDER_GROUP_H
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#endif
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