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https://github.com/kevinbentley/Descent3.git
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68 lines
2.1 KiB
C
68 lines
2.1 KiB
C
/*
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* Descent 3
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* Copyright (C) 2024 Parallax Software
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef LIGHTMAP_H
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#define LIGHTMAP_H
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#include "pstypes.h"
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#define MAX_LIGHTMAPS (65534)
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#define BAD_LM_INDEX 65535
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// lightmap flags
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#define LF_CHANGED 1 // this bitmap has changed since last frame (useful for hardware cacheing)
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#define LF_LIMITS 2 // This lightmap has a specific area that has changed since last frame
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#define LF_WRAP 4 // This lightmap should be drawn with wrapping (not clamping)
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#define LF_BRAND_NEW 8 // This lightmap is brand new and hasn't been to the video card yet
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struct bms_lightmap {
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uint8_t width, height; // Width and height in pixels
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uint16_t *data; // 16bit data
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uint16_t used;
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uint8_t flags;
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int16_t cache_slot; // for the renderers use
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uint8_t square_res; // for renderers use
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uint8_t cx1, cy1, cx2, cy2; // Change x and y coords
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};
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extern bms_lightmap GameLightmaps[MAX_LIGHTMAPS];
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// Sets all the lightmaps to unused
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void lm_InitLightmaps();
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void lm_ShutdownLightmaps(void);
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// Allocs a lightmap of w x h size
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// Returns lightmap handle if successful, -1 if otherwise
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int lm_AllocLightmap(int w, int h);
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// Given a handle, frees the lightmap memory and flags this lightmap as unused
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void lm_FreeLightmap(int handle);
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// returns a lightmaps width else -1 if something is wrong
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int lm_w(int handle);
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// returns a lightmaps height , else -1 if something is wrong
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int lm_h(int handle);
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// returns a lightmaps data else NULL if something is wrong
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uint16_t *lm_data(int handle);
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#endif
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