diff options
Diffstat (limited to 'source/blender/gpu/intern/gpu_draw.c')
| -rw-r--r-- | source/blender/gpu/intern/gpu_draw.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/source/blender/gpu/intern/gpu_draw.c b/source/blender/gpu/intern/gpu_draw.c index 52177b756c5..3ea64e1f6d5 100644 --- a/source/blender/gpu/intern/gpu_draw.c +++ b/source/blender/gpu/intern/gpu_draw.c @@ -2327,3 +2327,152 @@ void GPU_draw_update_fvar_offset(DerivedMesh *dm) } } #endif + + +/** \name Framebuffer color depth, for selection codes + * \{ */ + +#ifdef __APPLE__ + +/* apple seems to round colors to below and up on some configs */ + +static unsigned int index_to_framebuffer(int index) +{ + unsigned int i = index; + + switch (GPU_color_depth()) { + case 12: + i = ((i & 0xF00) << 12) + ((i & 0xF0) << 8) + ((i & 0xF) << 4); + /* sometimes dithering subtracts! */ + i |= 0x070707; + break; + case 15: + case 16: + i = ((i & 0x7C00) << 9) + ((i & 0x3E0) << 6) + ((i & 0x1F) << 3); + i |= 0x030303; + break; + case 24: + break; + default: /* 18 bits... */ + i = ((i & 0x3F000) << 6) + ((i & 0xFC0) << 4) + ((i & 0x3F) << 2); + i |= 0x010101; + break; + } + + return i; +} + +#else + +/* this is the old method as being in use for ages.... seems to work? colors are rounded to lower values */ + +static unsigned int index_to_framebuffer(int index) +{ + unsigned int i = index; + + switch (GPU_color_depth()) { + case 8: + i = ((i & 48) << 18) + ((i & 12) << 12) + ((i & 3) << 6); + i |= 0x3F3F3F; + break; + case 12: + i = ((i & 0xF00) << 12) + ((i & 0xF0) << 8) + ((i & 0xF) << 4); + /* sometimes dithering subtracts! */ + i |= 0x0F0F0F; + break; + case 15: + case 16: + i = ((i & 0x7C00) << 9) + ((i & 0x3E0) << 6) + ((i & 0x1F) << 3); + i |= 0x070707; + break; + case 24: + break; + default: /* 18 bits... */ + i = ((i & 0x3F000) << 6) + ((i & 0xFC0) << 4) + ((i & 0x3F) << 2); + i |= 0x030303; + break; + } + + return i; +} + +#endif + + +void GPU_select_index_set(int index) +{ + const int col = index_to_framebuffer(index); + glColor3ub(( (col) & 0xFF), + (((col) >> 8) & 0xFF), + (((col) >> 16) & 0xFF)); +} + +void GPU_select_index_get(int index, int *r_col) +{ + const int col = index_to_framebuffer(index); + char *c_col = (char *)r_col; + c_col[0] = (col & 0xFF); /* red */ + c_col[1] = ((col >> 8) & 0xFF); /* green */ + c_col[2] = ((col >> 16) & 0xFF); /* blue */ + c_col[3] = 0xFF; /* alpha */ +} + + +#define INDEX_FROM_BUF_8(col) ((((col) & 0xC00000) >> 18) + (((col) & 0xC000) >> 12) + (((col) & 0xC0) >> 6)) +#define INDEX_FROM_BUF_12(col) ((((col) & 0xF00000) >> 12) + (((col) & 0xF000) >> 8) + (((col) & 0xF0) >> 4)) +#define INDEX_FROM_BUF_15_16(col) ((((col) & 0xF80000) >> 9) + (((col) & 0xF800) >> 6) + (((col) & 0xF8) >> 3)) +#define INDEX_FROM_BUF_18(col) ((((col) & 0xFC0000) >> 6) + (((col) & 0xFC00) >> 4) + (((col) & 0xFC) >> 2)) +#define INDEX_FROM_BUF_24(col) ((col) & 0xFFFFFF) + +int GPU_select_to_index(unsigned int col) +{ + if (col == 0) { + return 0; + } + + switch (GPU_color_depth()) { + case 8: return INDEX_FROM_BUF_8(col); + case 12: return INDEX_FROM_BUF_12(col); + case 15: + case 16: return INDEX_FROM_BUF_15_16(col); + case 24: return INDEX_FROM_BUF_24(col); + default: return INDEX_FROM_BUF_18(col); + } +} + +void GPU_select_to_index_array(unsigned int *col, const unsigned int size) +{ +#define INDEX_BUF_ARRAY(INDEX_FROM_BUF_BITS) \ + for (i = size; i--; col++) { \ + if ((c = *col)) { \ + *col = INDEX_FROM_BUF_BITS(c); \ + } \ + } ((void)0) + + if (size > 0) { + unsigned int i, c; + + switch (GPU_color_depth()) { + case 8: + INDEX_BUF_ARRAY(INDEX_FROM_BUF_8); + break; + case 12: + INDEX_BUF_ARRAY(INDEX_FROM_BUF_12); + break; + case 15: + case 16: + INDEX_BUF_ARRAY(INDEX_FROM_BUF_15_16); + break; + case 24: + INDEX_BUF_ARRAY(INDEX_FROM_BUF_24); + break; + default: + INDEX_BUF_ARRAY(INDEX_FROM_BUF_18); + break; + } + } + +#undef INDEX_BUF_ARRAY +} + +/** \} */ |