diff options
Diffstat (limited to 'source/blender/imbuf/intern/divers.c')
| -rw-r--r-- | source/blender/imbuf/intern/divers.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/source/blender/imbuf/intern/divers.c b/source/blender/imbuf/intern/divers.c index 6b35d7df397..7fc7669601d 100644 --- a/source/blender/imbuf/intern/divers.c +++ b/source/blender/imbuf/intern/divers.c @@ -197,6 +197,135 @@ void IMB_rect_from_float(struct ImBuf *ibuf) ibuf->userflags &= ~IB_RECT_INVALID; } + + +/* converts from linear float to sRGB byte for part of the texture, buffer will hold the changed part */ +void IMB_partial_rect_from_float(struct ImBuf *ibuf,float *buffer, int x, int y, int w, int h) +{ + /* indices to source and destination image pixels */ + float *srcFloatPxl; + unsigned char *dstBytePxl; + /* buffer index will fill buffer */ + float *bufferIndex; + + /* convenience pointers to start of image buffers */ + float *init_srcFloatPxl = (float *)ibuf->rect_float; + unsigned char *init_dstBytePxl = (unsigned char *) ibuf->rect; + + /* Dithering factor */ + float dither= ibuf->dither / 255.0f; + /* respective attributes of image */ + short profile= ibuf->profile; + int channels= ibuf->channels; + + int i, j; + + /* + if called -only- from GPU_paint_update_image this test will never fail + but leaving it here for better or worse + */ + if(init_srcFloatPxl==NULL || (buffer == NULL)){ + return; + } + if(init_dstBytePxl==NULL) { + imb_addrectImBuf(ibuf); + init_dstBytePxl = (unsigned char *) ibuf->rect; + } + if(channels==1) { + for (j = 0; j < h; j++){ + bufferIndex = buffer + w*j*4; + dstBytePxl = init_dstBytePxl + (ibuf->x*(y + j) + x)*4; + srcFloatPxl = init_srcFloatPxl + (ibuf->x*(y + j) + x); + for(i = 0; i < w; i++, dstBytePxl+=4, srcFloatPxl++, bufferIndex+=4) { + dstBytePxl[1]= dstBytePxl[2]= dstBytePxl[3]= dstBytePxl[0] = FTOCHAR(srcFloatPxl[0]); + bufferIndex[0] = bufferIndex[1] = bufferIndex[2] = bufferIndex[3] = srcFloatPxl[0]; + } + } + } + else if (profile == IB_PROFILE_LINEAR_RGB) { + if(channels == 3) { + for (j = 0; j < h; j++){ + bufferIndex = buffer + w*j*4; + dstBytePxl = init_dstBytePxl + (ibuf->x*(y + j) + x)*4; + srcFloatPxl = init_srcFloatPxl + (ibuf->x*(y + j) + x)*3; + for(i = 0; i < w; i++, dstBytePxl+=4, srcFloatPxl+=3, bufferIndex += 4) { + linearrgb_to_srgb_v3_v3(bufferIndex, srcFloatPxl); + F3TOCHAR4(bufferIndex, dstBytePxl); + bufferIndex[3]= 1.0; + } + } + } + else if (channels == 4) { + if (dither != 0.f) { + for (j = 0; j < h; j++){ + bufferIndex = buffer + w*j*4; + dstBytePxl = init_dstBytePxl + (ibuf->x*(y + j) + x)*4; + srcFloatPxl = init_srcFloatPxl + (ibuf->x*(y + j) + x)*4; + for(i = 0; i < w; i++, dstBytePxl+=4, srcFloatPxl+=4, bufferIndex+=4) { + const float d = (BLI_frand()-0.5f)*dither; + linearrgb_to_srgb_v3_v3(bufferIndex, srcFloatPxl); + bufferIndex[3] = srcFloatPxl[3]; + add_v4_fl(bufferIndex, d); + F4TOCHAR4(bufferIndex, dstBytePxl); + } + } + } else { + for (j = 0; j < h; j++){ + bufferIndex = buffer + w*j*4; + dstBytePxl = init_dstBytePxl + (ibuf->x*(y + j) + x)*4; + srcFloatPxl = init_srcFloatPxl + (ibuf->x*(y + j) + x)*4; + for(i = 0; i < w; i++, dstBytePxl+=4, srcFloatPxl+=4, bufferIndex+=4) { + linearrgb_to_srgb_v3_v3(bufferIndex, srcFloatPxl); + bufferIndex[3]= srcFloatPxl[3]; + F4TOCHAR4(bufferIndex, dstBytePxl); + } + } + } + } + } + else if(ELEM(profile, IB_PROFILE_NONE, IB_PROFILE_SRGB)) { + if(channels==3) { + for (j = 0; j < h; j++){ + bufferIndex = buffer + w*j*4; + dstBytePxl = init_dstBytePxl + (ibuf->x*(y + j) + x)*4; + srcFloatPxl = init_srcFloatPxl + (ibuf->x*(y + j) + x)*3; + for(i = 0; i < w; i++, dstBytePxl+=4, srcFloatPxl+=3, bufferIndex+=4) { + copy_v3_v3(bufferIndex, srcFloatPxl); + F3TOCHAR4(bufferIndex, dstBytePxl); + bufferIndex[3] = 1.0; + } + } + } + else { + if (dither != 0.f) { + for (j = 0; j < h; j++){ + bufferIndex = buffer + w*j*4; + dstBytePxl = init_dstBytePxl + (ibuf->x*(y + j) + x)*4; + srcFloatPxl = init_srcFloatPxl + (ibuf->x*(y + j) + x)*4; + for(i = 0; i < w; i++, dstBytePxl+=4, srcFloatPxl+=4, bufferIndex+=4) { + const float d = (BLI_frand()-0.5f)*dither; + copy_v4_v4(bufferIndex, srcFloatPxl); + add_v4_fl(bufferIndex,d); + F4TOCHAR4(bufferIndex, dstBytePxl); + } + } + } else { + for (j = 0; j < h; j++){ + bufferIndex = buffer + w*j*4; + dstBytePxl = init_dstBytePxl + (ibuf->x*(y + j) + x)*4; + srcFloatPxl = init_srcFloatPxl + (ibuf->x*(y + j) + x)*4; + for(i = 0; i < w; i++, dstBytePxl+=4, srcFloatPxl+=4, bufferIndex+=4) { + copy_v4_v4(bufferIndex, srcFloatPxl); + F4TOCHAR4(bufferIndex, dstBytePxl); + } + } + } + } + } + /* ensure user flag is reset */ + ibuf->userflags &= ~IB_RECT_INVALID; +} + static void imb_float_from_rect_nonlinear(struct ImBuf *ibuf, float *fbuf) { float *tof = fbuf; @@ -361,3 +490,23 @@ float *IMB_float_profile_ensure(struct ImBuf *ibuf, int profile, int *alloc) return fbuf; } } + + +/* no profile conversion */ +void IMB_color_to_bw(struct ImBuf *ibuf) +{ + float *rctf= ibuf->rect_float; + unsigned char *rct= (unsigned char *)ibuf->rect; + int i; + if(rctf) { + for (i = ibuf->x * ibuf->y; i > 0; i--, rctf+=4) { + rctf[0]= rctf[1]= rctf[2]= rgb_to_grayscale(rctf); + } + } + + if(rct) { + for (i = ibuf->x * ibuf->y; i > 0; i--, rct+=4) { + rct[0]= rct[1]= rct[2]= rgb_to_grayscale_byte(rct); + } + } +} |