diff options
Diffstat (limited to 'source/blender/imbuf/intern/colormanagement.c')
| -rw-r--r-- | source/blender/imbuf/intern/colormanagement.c | 209 |
1 files changed, 122 insertions, 87 deletions
diff --git a/source/blender/imbuf/intern/colormanagement.c b/source/blender/imbuf/intern/colormanagement.c index 53aa74edc61..1613595148b 100644 --- a/source/blender/imbuf/intern/colormanagement.c +++ b/source/blender/imbuf/intern/colormanagement.c @@ -2445,68 +2445,77 @@ void IMB_colormanagement_imbuf_make_display_space( colormanagement_imbuf_make_display_space(ibuf, view_settings, display_settings, false); } +static ImBuf *imbuf_ensure_editable(ImBuf *ibuf, ImBuf *colormanaged_ibuf, bool allocate_result) +{ + if (colormanaged_ibuf != ibuf) { + /* Is already an editable copy. */ + return colormanaged_ibuf; + } + + if (allocate_result) { + /* Copy full image buffer. */ + colormanaged_ibuf = IMB_dupImBuf(ibuf); + IMB_metadata_copy(colormanaged_ibuf, ibuf); + return colormanaged_ibuf; + } + else { + /* Render pipeline is constructing image buffer itself, + * but it's re-using byte and float buffers from render result make copy of this buffers + * here sine this buffers would be transformed to other color space here. */ + if (ibuf->rect && (ibuf->mall & IB_rect) == 0) { + ibuf->rect = MEM_dupallocN(ibuf->rect); + ibuf->mall |= IB_rect; + } + + if (ibuf->rect_float && (ibuf->mall & IB_rectfloat) == 0) { + ibuf->rect_float = MEM_dupallocN(ibuf->rect_float); + ibuf->mall |= IB_rectfloat; + } + + return ibuf; + } +} + ImBuf *IMB_colormanagement_imbuf_for_write(ImBuf *ibuf, bool save_as_render, bool allocate_result, const ImageFormatData *image_format) { ImBuf *colormanaged_ibuf = ibuf; - const bool is_movie = BKE_imtype_is_movie(image_format->imtype); - const bool requires_linear_float = BKE_imtype_requires_linear_float(image_format->imtype); - const bool do_alpha_under = image_format->planes != R_IMF_PLANES_RGBA; + /* Update byte buffer if exists but invalid. */ if (ibuf->rect_float && ibuf->rect && (ibuf->userflags & (IB_DISPLAY_BUFFER_INVALID | IB_RECT_INVALID)) != 0) { IMB_rect_from_float(ibuf); ibuf->userflags &= ~(IB_RECT_INVALID | IB_DISPLAY_BUFFER_INVALID); } - const bool do_colormanagement_display = save_as_render && (is_movie || !requires_linear_float); - const bool do_colormanagement_linear = save_as_render && requires_linear_float && - image_format->linear_colorspace_settings.name[0] && - !IMB_colormanagement_space_name_is_scene_linear( - image_format->linear_colorspace_settings.name); - - if (do_colormanagement_display || do_colormanagement_linear || do_alpha_under) { - if (allocate_result) { - colormanaged_ibuf = IMB_dupImBuf(ibuf); - } - else { - /* Render pipeline is constructing image buffer itself, - * but it's re-using byte and float buffers from render result make copy of this buffers - * here sine this buffers would be transformed to other color space here. - */ + /* Detect if we are writing to a file format that needs a linear float buffer. */ + const bool linear_float_output = BKE_imtype_requires_linear_float(image_format->imtype); - if (ibuf->rect && (ibuf->mall & IB_rect) == 0) { - ibuf->rect = MEM_dupallocN(ibuf->rect); - ibuf->mall |= IB_rect; - } + /* Detect if we are writing output a byte buffer, which we would need to create + * with color management conversions applied. This may be for either applying the + * display transform for renders, or a user specified color space for the file. */ + const bool byte_output = BKE_image_format_is_byte(image_format); - if (ibuf->rect_float && (ibuf->mall & IB_rectfloat) == 0) { - ibuf->rect_float = MEM_dupallocN(ibuf->rect_float); - ibuf->mall |= IB_rectfloat; - } - } - } + BLI_assert(!(byte_output && linear_float_output)); - /* If we're saving from RGBA to RGB buffer then it's not - * so much useful to just ignore alpha -- it leads to bad - * artifacts especially when saving byte images. - * - * What we do here is we're overlaying our image on top of - * background color (which is currently black). + /* If we're saving from RGBA to RGB buffer then it's not so much useful to just ignore alpha -- + * it leads to bad artifacts especially when saving byte images. * - * This is quite much the same as what Gimp does and it - * seems to be what artists expects from saving. + * What we do here is we're overlaying our image on top of background color (which is currently + * black). This is quite much the same as what Gimp does and it seems to be what artists expects + * from saving. * - * Do a conversion here, so image format writers could - * happily assume all the alpha tricks were made already. - * helps keep things locally here, not spreading it to - * all possible image writers we've got. + * Do a conversion here, so image format writers could happily assume all the alpha tricks were + * made already. helps keep things locally here, not spreading it to all possible image writers + * we've got. */ - if (do_alpha_under) { + if (image_format->planes != R_IMF_PLANES_RGBA) { float color[3] = {0, 0, 0}; + colormanaged_ibuf = imbuf_ensure_editable(ibuf, colormanaged_ibuf, allocate_result); + if (colormanaged_ibuf->rect_float && colormanaged_ibuf->channels == 4) { IMB_alpha_under_color_float( colormanaged_ibuf->rect_float, colormanaged_ibuf->x, colormanaged_ibuf->y, color); @@ -2520,69 +2529,95 @@ ImBuf *IMB_colormanagement_imbuf_for_write(ImBuf *ibuf, } } - if (do_colormanagement_display) { - /* Color management with display and view transform. */ - bool make_byte = false; + if (save_as_render && !linear_float_output) { + /* Render output: perform conversion to display space using view transform. */ + colormanaged_ibuf = imbuf_ensure_editable(ibuf, colormanaged_ibuf, allocate_result); - /* for proper check whether byte buffer is required by a format or not - * should be pretty safe since this image buffer is supposed to be used for - * saving only and ftype would be overwritten a bit later by BKE_imbuf_write - */ - colormanaged_ibuf->ftype = BKE_imtype_to_ftype(image_format->imtype, - &colormanaged_ibuf->foptions); - - /* if file format isn't able to handle float buffer itself, - * we need to allocate byte buffer and store color managed - * image there - */ - const ImFileType *type = IMB_file_type_from_ibuf(colormanaged_ibuf); - if (type != NULL) { - if ((type->save != NULL) && (type->flag & IM_FTYPE_FLOAT) == 0) { - make_byte = true; - } - } - - /* perform color space conversions */ colormanagement_imbuf_make_display_space(colormanaged_ibuf, &image_format->view_settings, &image_format->display_settings, - make_byte); + byte_output); if (colormanaged_ibuf->rect_float) { - /* float buffer isn't linear anymore, + /* Float buffer isn't linear anymore, * image format write callback should check for this flag and assume - * no space conversion should happen if ibuf->float_colorspace != NULL - */ + * no space conversion should happen if ibuf->float_colorspace != NULL. */ colormanaged_ibuf->float_colorspace = display_transform_get_colorspace( &image_format->view_settings, &image_format->display_settings); + if (byte_output) { + colormanaged_ibuf->rect_colorspace = colormanaged_ibuf->float_colorspace; + } } } - else if (do_colormanagement_linear) { - /* Color management transform to another linear color space. */ - if (!colormanaged_ibuf->rect_float) { - IMB_float_from_rect(colormanaged_ibuf); - imb_freerectImBuf(colormanaged_ibuf); + else { + /* Linear render or regular file output: conversion between two color spaces. */ + + /* Detect which color space we need to convert between. */ + const char *from_colorspace = (ibuf->rect_float && !(byte_output && ibuf->rect)) ? + /* From float buffer. */ + (ibuf->float_colorspace) ? ibuf->float_colorspace->name : + global_role_scene_linear : + /* From byte buffer. */ + (ibuf->rect_colorspace) ? ibuf->rect_colorspace->name : + global_role_default_byte; + + const char *to_colorspace = image_format->linear_colorspace_settings.name; + + /* TODO: can we check with OCIO if color spaces are the same but have different names? */ + if (to_colorspace[0] == '\0' || STREQ(from_colorspace, to_colorspace)) { + /* No conversion needed, but may still need to allocate byte buffer for output. */ + if (byte_output && !ibuf->rect) { + ibuf->rect_colorspace = ibuf->float_colorspace; + IMB_rect_from_float(ibuf); + } } + else { + /* Color space conversion needed. */ + colormanaged_ibuf = imbuf_ensure_editable(ibuf, colormanaged_ibuf, allocate_result); + + if (byte_output) { + colormanaged_ibuf->rect_colorspace = colormanage_colorspace_get_named(to_colorspace); + + if (colormanaged_ibuf->rect) { + /* Byte to byte. */ + IMB_colormanagement_transform_byte_threaded((unsigned char *)colormanaged_ibuf->rect, + colormanaged_ibuf->x, + colormanaged_ibuf->y, + colormanaged_ibuf->channels, + from_colorspace, + to_colorspace); + } + else { + /* Float to byte. */ + IMB_rect_from_float(colormanaged_ibuf); + } + } + else { + if (!colormanaged_ibuf->rect_float) { + /* Byte to float. */ + IMB_float_from_rect(colormanaged_ibuf); + imb_freerectImBuf(colormanaged_ibuf); - if (colormanaged_ibuf->rect_float) { - const char *from_colorspace = (ibuf->float_colorspace) ? ibuf->float_colorspace->name : - global_role_scene_linear; - const char *to_colorspace = image_format->linear_colorspace_settings.name; + /* This conversion always goes to scene linear. */ + from_colorspace = global_role_scene_linear; + } - IMB_colormanagement_transform(colormanaged_ibuf->rect_float, - colormanaged_ibuf->x, - colormanaged_ibuf->y, - colormanaged_ibuf->channels, - from_colorspace, - to_colorspace, - false); + if (colormanaged_ibuf->rect_float) { + /* Float to float. */ + IMB_colormanagement_transform(colormanaged_ibuf->rect_float, + colormanaged_ibuf->x, + colormanaged_ibuf->y, + colormanaged_ibuf->channels, + from_colorspace, + to_colorspace, + false); + + colormanaged_ibuf->float_colorspace = colormanage_colorspace_get_named(to_colorspace); + } + } } } - if (colormanaged_ibuf != ibuf) { - IMB_metadata_copy(colormanaged_ibuf, ibuf); - } - return colormanaged_ibuf; } |