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[rlsw] Review depth formats and fix depth writing (#5317)

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* review depth format/writing

* adding a note
This commit is contained in:
Le Juez Victor 2025-10-30 19:17:18 +01:00 committed by GitHub
parent b2d455400c
commit bca54047f9
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1 changed files with 30 additions and 28 deletions
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56
src/external/rlsw.h vendored
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@ -118,7 +118,7 @@
#endif #endif
#ifndef SW_DEPTH_BUFFER_BITS #ifndef SW_DEPTH_BUFFER_BITS
#define SW_DEPTH_BUFFER_BITS 16 //< 24, 16 or 8 #define SW_DEPTH_BUFFER_BITS 16 //< 32, 24 or 16
#endif #endif
#ifndef SW_MAX_PROJECTION_STACK_SIZE #ifndef SW_MAX_PROJECTION_STACK_SIZE
@ -748,32 +748,32 @@ SWAPI void swBindTexture(uint32_t id);
#define SW_COLOR_PACK_COMP 4 #define SW_COLOR_PACK_COMP 4
#endif #endif
#if (SW_DEPTH_BUFFER_BITS == 8) #if (SW_DEPTH_BUFFER_BITS == 16)
#define SW_DEPTH_TYPE uint8_t #define SW_DEPTH_TYPE uint16_t
#define SW_DEPTH_IS_PACKED 1 #define SW_DEPTH_IS_PACKED 1
#define SW_DEPTH_PACK_COMP 1 #define SW_DEPTH_PACK_COMP 1
#define SW_DEPTH_MAX UINT8_MAX #define SW_DEPTH_MAX UINT16_MAX
#define SW_DEPTH_SCALE (1.0f/UINT8_MAX) #define SW_DEPTH_SCALE (1.0f/UINT16_MAX)
#define SW_PACK_DEPTH(d) ((SW_DEPTH_TYPE)((d)*SW_DEPTH_MAX)) #define SW_PACK_DEPTH(d) ((SW_DEPTH_TYPE)((d)*SW_DEPTH_MAX))
#define SW_UNPACK_DEPTH(p) (p) #define SW_UNPACK_DEPTH(p) (p)
#elif (SW_DEPTH_BUFFER_BITS == 16) #elif (SW_DEPTH_BUFFER_BITS == 24)
#define SW_DEPTH_TYPE uint16_t #define SW_DEPTH_TYPE uint8_t
#define SW_DEPTH_IS_PACKED 1 #define SW_DEPTH_IS_PACKED 0
#define SW_DEPTH_PACK_COMP 1 #define SW_DEPTH_PACK_COMP 3
#define SW_DEPTH_MAX UINT16_MAX #define SW_DEPTH_MAX 0xFFFFFFU
#define SW_DEPTH_SCALE (1.0f/UINT16_MAX) #define SW_DEPTH_SCALE (1.0f/0xFFFFFFU)
#define SW_PACK_DEPTH(d) ((SW_DEPTH_TYPE)((d)*SW_DEPTH_MAX)) #define SW_PACK_DEPTH_0(d) ((uint8_t)(((uint32_t)((d)*SW_DEPTH_MAX)>>16)&0xFFU))
#define SW_UNPACK_DEPTH(p) (p) #define SW_PACK_DEPTH_1(d) ((uint8_t)(((uint32_t)((d)*SW_DEPTH_MAX)>>8)&0xFFU))
#else // 24 bits #define SW_PACK_DEPTH_2(d) ((uint8_t)((uint32_t)((d)*SW_DEPTH_MAX)&0xFFU))
#define SW_DEPTH_TYPE uint8_t #define SW_UNPACK_DEPTH(p) ((((uint32_t)(p)[0]<<16)|((uint32_t)(p)[1]<<8)|(uint32_t)(p)[2]))
#define SW_DEPTH_IS_PACKED 0 #else // 32 bits
#define SW_DEPTH_PACK_COMP 3 #define SW_DEPTH_TYPE float
#define SW_DEPTH_MAX 0xFFFFFF #define SW_DEPTH_IS_PACKED 1
#define SW_DEPTH_SCALE (1.0f/0xFFFFFF) #define SW_DEPTH_PACK_COMP 1
#define SW_PACK_DEPTH_0(d) (((uint32_t)((d)*SW_DEPTH_MAX)>>16)&0xFF) #define SW_DEPTH_MAX 1.0f
#define SW_PACK_DEPTH_1(d) (((uint32_t)((d)*SW_DEPTH_MAX)>>8)&0xFF) #define SW_DEPTH_SCALE 1.0f
#define SW_PACK_DEPTH_2(d) ((uint32_t)((d)*SW_DEPTH_MAX)&0xFF) #define SW_PACK_DEPTH(d) ((SW_DEPTH_TYPE)(d))
#define SW_UNPACK_DEPTH(p) (((p)[0]<<16)|((p)[1]<<8)|(p)[2]) #define SW_UNPACK_DEPTH(p) (p)
#endif #endif
#define SW_STATE_CHECK(flags) (SW_STATE_CHECK_EX(RLSW.stateFlags, (flags))) #define SW_STATE_CHECK(flags) (SW_STATE_CHECK_EX(RLSW.stateFlags, (flags)))
@ -1346,6 +1346,8 @@ static inline void sw_framebuffer_write_color(sw_pixel_t *dst, const float src[4
static inline void sw_framebuffer_write_depth(sw_pixel_t *dst, float depth) static inline void sw_framebuffer_write_depth(sw_pixel_t *dst, float depth)
{ {
depth = sw_saturate(depth); // REVIEW: An overflow can occur in certain circumstances with clipping, and needs to be reviewed...
#if SW_DEPTH_IS_PACKED #if SW_DEPTH_IS_PACKED
dst->depth[0] = SW_PACK_DEPTH(depth); dst->depth[0] = SW_PACK_DEPTH(depth);
#else #else