Color Management, Stage 2: Switch color pipeline to use OpenColorIO

Replace old color pipeline which was supporting linear/sRGB color spaces
only with OpenColorIO-based pipeline.

This introduces two configurable color spaces:

- Input color space for images and movie clips. This space is used to convert
  images/movies from color space in which file is saved to Blender's linear
  space (for float images, byte images are not internally converted, only input
  space is stored for such images and used later).

  This setting could be found in image/clip data block settings.

- Display color space which defines space in which particular display is working.

  This settings could be found in scene's Color Management panel.

When render result is being displayed on the screen, apart from converting image
to display space, some additional conversions could happen.

This conversions are:

- View, which defines tone curve applying before display transformation.
  These are different ways to view the image on the same display device.
  For example it could be used to emulate film view on sRGB display.

- Exposure affects on image exposure before tone map is applied.

- Gamma is post-display gamma correction, could be used to match particular
  display gamma.

- RGB curves are user-defined curves which are applying before display
  transformation, could be used for different purposes.

All this settings by default are only applying on render result and does not
affect on other images. If some particular image needs to be affected by this
transformation, "View as Render" setting of image data block should be set to
truth. Movie clips are always affected by all display transformations.

This commit also introduces configurable color space in which sequencer is
working. This setting could be found in scene's Color Management panel and
it should be used if such stuff as grading needs to be done in color space
different from sRGB (i.e. when Film view on sRGB display is use, using VD16
space as sequencer's internal space would make grading working in space
which is close to the space using for display).

Some technical notes:

- Image buffer's float buffer is now always in linear space, even if it was
  created from 16bit byte images.

- Space of byte buffer is stored in image buffer's rect_colorspace property.

- Profile of image buffer was removed since it's not longer meaningful.

- OpenGL and GLSL is supposed to always work in sRGB space. It is possible
  to support other spaces, but it's quite large project which isn't so
  much important.

- Legacy Color Management option disabled is emulated by using None display.
  It could have some regressions, but there's no clear way to avoid them.

- If OpenColorIO is disabled on build time, it should make blender behaving
  in the same way as previous release with color management enabled.

More details could be found at this page (more details would be added soon):
http://wiki.blender.org/index.php/Dev:Ref/Release_Notes/2.64/Color_Management

--
Thanks to Xavier Thomas, Lukas Toene for initial work on OpenColorIO
integration and to Brecht van Lommel for some further development and code/
usecase review!

11 files changed, 331 insertions, 75 deletions

diff --git a/source/blender/blenkernel/intern/blender.c b/source/blender/blenkernel/intern/blender.c
index 45e2167af2f..99b788e80ce 100644
--- a/source/blender/blenkernel/intern/blender.c
+++ b/source/blender/blenkernel/intern/blender.c
@@ -89,6 +89,8 @@
 
 #include "WM_api.h" // XXXXX BAD, very BAD dependency (bad level call) - remove asap, elubie
 
+#include "IMB_colormanagement.h"
+
 #ifdef WITH_PYTHON
 #  include "BPY_extern.h"
 #endif
@@ -320,7 +322,11 @@ static void setup_app_data(bContext *C, BlendFileData *bfd, const char *filepath
 
 	/* baseflags, groups, make depsgraph, etc */
 	BKE_scene_set_background(G.main, CTX_data_scene(C));
-	
+
+	if (mode != 'u') {
+		IMB_colormanagement_check_file_config(G.main);
+	}
+
 	MEM_freeN(bfd);
 
 	(void)curscene; /* quiet warning */
diff --git a/source/blender/blenkernel/intern/colortools.c b/source/blender/blenkernel/intern/colortools.c
index d65c81b4f9b..19c8c2cd632 100644
--- a/source/blender/blenkernel/intern/colortools.c
+++ b/source/blender/blenkernel/intern/colortools.c
@@ -49,6 +49,7 @@
 #include "BKE_fcurve.h"
 
 
+#include "IMB_colormanagement.h"
 #include "IMB_imbuf.h"
 #include "IMB_imbuf_types.h"
 
@@ -174,6 +175,7 @@ void curvemapping_set_black_white(CurveMapping *cumap, const float black[3], con
 	}
 
 	curvemapping_set_black_white_ex(cumap->black, cumap->white, cumap->bwmul);
+	cumap->changed_timestamp++;
 }
 
 /* ***************** operations on single curve ************* */
@@ -996,7 +998,8 @@ static void save_sample_line(Scopes *scopes, const int idx, const float fx, cons
 	}
 }
 
-void BKE_histogram_update_sample_line(Histogram *hist, ImBuf *ibuf, const short use_color_management)
+void BKE_histogram_update_sample_line(Histogram *hist, ImBuf *ibuf, const ColorManagedViewSettings *view_settings,
+                                      const ColorManagedDisplaySettings *display_settings)
 {
 	int i, x, y;
 	float *fp;
@@ -1008,6 +1011,8 @@ void BKE_histogram_update_sample_line(Histogram *hist, ImBuf *ibuf, const short
 	int y1 = 0.5f + hist->co[0][1] * ibuf->y;
 	int y2 = 0.5f + hist->co[1][1] * ibuf->y;
 
+	struct ColormanageProcessor *cm_processor = NULL;
+
 	hist->channels = 3;
 	hist->x_resolution = 256;
 	hist->xmax = 1.0f;
@@ -1015,6 +1020,9 @@ void BKE_histogram_update_sample_line(Histogram *hist, ImBuf *ibuf, const short
 
 	if (ibuf->rect == NULL && ibuf->rect_float == NULL) return;
 
+	if (ibuf->rect_float)
+		cm_processor = IMB_colormanagement_display_processor_new(view_settings, display_settings);
+
 	/* persistent draw */
 	hist->flag |= HISTO_FLAG_SAMPLELINE; /* keep drawing the flag after */
 
@@ -1029,10 +1037,8 @@ void BKE_histogram_update_sample_line(Histogram *hist, ImBuf *ibuf, const short
 			if (ibuf->rect_float) {
 				fp = (ibuf->rect_float + (ibuf->channels) * (y * ibuf->x + x));
 
-				if (use_color_management)
-					linearrgb_to_srgb_v3_v3(rgb, fp);
-				else
-					copy_v3_v3(rgb, fp);
+				copy_v3_v3(rgb, fp);
+				IMB_colormanagement_processor_apply_v3(cm_processor, rgb);
 
 				hist->data_luma[i]  = rgb_to_luma(rgb);
 				hist->data_r[i]     = rgb[0];
@@ -1050,9 +1056,13 @@ void BKE_histogram_update_sample_line(Histogram *hist, ImBuf *ibuf, const short
 			}
 		}
 	}
+
+	if (cm_processor)
+		IMB_colormanagement_processor_free(cm_processor);
 }
 
-void scopes_update(Scopes *scopes, ImBuf *ibuf, int use_color_management)
+void scopes_update(Scopes *scopes, ImBuf *ibuf, const ColorManagedViewSettings *view_settings,
+                   const ColorManagedDisplaySettings *display_settings)
 {
 	int x, y, c;
 	unsigned int n, nl;
@@ -1065,6 +1075,8 @@ void scopes_update(Scopes *scopes, ImBuf *ibuf, int use_color_management)
 	int ycc_mode = -1;
 	const short is_float = (ibuf->rect_float != NULL);
 
+	struct ColormanageProcessor *cm_processor = NULL;
+
 	if (ibuf->rect == NULL && ibuf->rect_float == NULL) return;
 
 	if (scopes->ok == 1) return;
@@ -1134,6 +1146,9 @@ void scopes_update(Scopes *scopes, ImBuf *ibuf, int use_color_management)
 	else
 		rc = (unsigned char *)ibuf->rect;
 
+	if (ibuf->rect_float)
+		cm_processor = IMB_colormanagement_display_processor_new(view_settings, display_settings);
+
 	for (y = 0; y < ibuf->y; y++) {
 		if (savedlines < scopes->sample_lines && y >= ((savedlines) * ibuf->y) / (scopes->sample_lines + 1)) {
 			saveline = 1;
@@ -1144,11 +1159,8 @@ void scopes_update(Scopes *scopes, ImBuf *ibuf, int use_color_management)
 		for (x = 0; x < ibuf->x; x++) {
 
 			if (is_float) {
-				if (use_color_management)
-					linearrgb_to_srgb_v3_v3(rgba, rf);
-				else
-					copy_v3_v3(rgba, rf);
-				rgba[3] = rf[3];
+				copy_v4_v4(rgba, rf);
+				IMB_colormanagement_processor_apply_v4(cm_processor, rgba);
 			}
 			else {
 				for (c = 0; c < 4; c++)
@@ -1219,6 +1231,9 @@ void scopes_update(Scopes *scopes, ImBuf *ibuf, int use_color_management)
 	MEM_freeN(bin_b);
 	MEM_freeN(bin_a);
 
+	if (cm_processor)
+		IMB_colormanagement_processor_free(cm_processor);
+
 	scopes->ok = 1;
 }
 
@@ -1257,3 +1272,58 @@ void scopes_new(Scopes *scopes)
 	scopes->waveform_3 = NULL;
 	scopes->vecscope = NULL;
 }
+
+void BKE_color_managed_display_settings_init(ColorManagedDisplaySettings *settings)
+{
+	const char *display_name = IMB_colormanagement_display_get_default_name();
+
+	BLI_strncpy(settings->display_device, display_name, sizeof(settings->display_device));
+}
+
+void BKE_color_managed_display_settings_copy(ColorManagedDisplaySettings *new_settings,
+                                             const ColorManagedDisplaySettings *settings)
+{
+	BLI_strncpy(new_settings->display_device, settings->display_device, sizeof(new_settings->display_device));
+}
+
+void BKE_color_managed_view_settings_init(ColorManagedViewSettings *settings)
+{
+	/* OCIO_TODO: use default view transform here when OCIO is completely integrated
+	*             and proper versioning stuff is added.
+	*             for now use NONE to be compatible with all current files
+	*/
+	BLI_strncpy(settings->view_transform, "Default", sizeof(settings->view_transform));
+
+	settings->gamma = 1.0f;
+	settings->exposure = 0.0f;
+}
+
+void BKE_color_managed_view_settings_copy(ColorManagedViewSettings *new_settings,
+                                          const ColorManagedViewSettings *settings)
+{
+	BLI_strncpy(new_settings->view_transform, settings->view_transform, sizeof(new_settings->view_transform));
+
+	new_settings->flag = settings->flag;
+	new_settings->exposure = settings->exposure;
+	new_settings->gamma = settings->gamma;
+
+	if (settings->curve_mapping)
+		new_settings->curve_mapping = curvemapping_copy(settings->curve_mapping);
+}
+
+void BKE_color_managed_view_settings_free(ColorManagedViewSettings *settings)
+{
+	if (settings->curve_mapping)
+		curvemapping_free(settings->curve_mapping);
+}
+
+void BKE_color_managed_colorspace_settings_init(ColorManagedColorspaceSettings *colorspace_settings)
+{
+	BLI_strncpy(colorspace_settings->name, "", sizeof(colorspace_settings->name));
+}
+
+void BKE_color_managed_colorspace_settings_copy(ColorManagedColorspaceSettings *colorspace_settings,
+                                                const ColorManagedColorspaceSettings *settings)
+{
+	BLI_strncpy(colorspace_settings->name, settings->name, sizeof(colorspace_settings->name));
+}
diff --git a/source/blender/blenkernel/intern/image.c b/source/blender/blenkernel/intern/image.c
index 3f756e74b26..d514a0a7dd0 100644
--- a/source/blender/blenkernel/intern/image.c
+++ b/source/blender/blenkernel/intern/image.c
@@ -47,6 +47,7 @@
 
 #include "MEM_guardedalloc.h"
 
+#include "IMB_colormanagement.h"
 #include "IMB_imbuf_types.h"
 #include "IMB_imbuf.h"
 
@@ -70,6 +71,7 @@
 #include "BLI_bpath.h"
 
 #include "BKE_bmfont.h"
+#include "BKE_colortools.h"
 #include "BKE_global.h"
 #include "BKE_icons.h"
 #include "BKE_image.h"
@@ -243,6 +245,11 @@ static Image *image_alloc(const char *name, short source, short type)
 
 		ima->source = source;
 		ima->type = type;
+
+		if (source == IMA_SRC_VIEWER)
+			ima->flag |= IMA_VIEW_AS_RENDER;
+
+		BKE_color_managed_colorspace_settings_init(&ima->colorspace_settings);
 	}
 	return ima;
 }
@@ -325,6 +332,8 @@ Image *BKE_image_copy(Image *ima)
 	nima->aspx = ima->aspx;
 	nima->aspy = ima->aspy;
 
+	BKE_color_managed_colorspace_settings_copy(&nima->colorspace_settings, &ima->colorspace_settings);
+
 	return nima;
 }
 
@@ -603,12 +612,10 @@ static ImBuf *add_ibuf_size(unsigned int width, unsigned int height, const char
 	if (floatbuf) {
 		ibuf = IMB_allocImBuf(width, height, depth, IB_rectfloat);
 		rect_float = ibuf->rect_float;
-		ibuf->profile = IB_PROFILE_LINEAR_RGB;
 	}
 	else {
 		ibuf = IMB_allocImBuf(width, height, depth, IB_rect);
 		rect = (unsigned char *)ibuf->rect;
-		ibuf->profile = IB_PROFILE_SRGB;
 	}
 
 	BLI_strncpy(ibuf->name, name, sizeof(ibuf->name));
@@ -1009,6 +1016,19 @@ int BKE_imtype_supports_quality(const char imtype)
 	return 0;
 }
 
+int BKE_imtype_supports_float(const char imtype)
+{
+	switch (imtype) {
+		case R_IMF_IMTYPE_CINEON:
+		case R_IMF_IMTYPE_DPX:
+		case R_IMF_IMTYPE_RADHDR:
+		case R_IMF_IMTYPE_OPENEXR:
+		case R_IMF_IMTYPE_MULTILAYER:
+			return TRUE;
+	}
+	return 0;
+}
+
 char BKE_imtype_valid_channels(const char imtype)
 {
 	char chan_flag = IMA_CHAN_FLAG_RGB; /* assume all support rgb */
@@ -1477,10 +1497,11 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 	int x, y, y_ofs;
 	float h_fixed;
 	const int mono = blf_mono_font_render; // XXX
+	struct ColorManagedDisplay *display;
+	const char *display_device;
 
 	/* this could be an argument if we want to operate on non linear float imbuf's
 	 * for now though this is only used for renders which use scene settings */
-	const int do_color_management = (scene->r.color_mgt_flag & R_COLOR_MANAGEMENT) != 0;
 
 #define BUFF_MARGIN_X 2
 #define BUFF_MARGIN_Y 1
@@ -1488,6 +1509,9 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 	if (!rect && !rectf)
 		return;
 
+	display_device = scene->display_settings.display_device;
+	display = IMB_colormanagement_display_get_named(display_device);
+
 	stampdata(scene, camera, &stamp_data, 1);
 
 	/* TODO, do_versions */
@@ -1497,7 +1521,7 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 	/* set before return */
 	BLF_size(mono, scene->r.stamp_font_id, 72);
 
-	BLF_buffer(mono, rectf, rect, width, height, channels, do_color_management);
+	BLF_buffer(mono, rectf, rect, width, height, channels, display);
 	BLF_buffer_col(mono, scene->r.fg_stamp[0], scene->r.fg_stamp[1], scene->r.fg_stamp[2], 1.0);
 	pad = BLF_width_max(mono);
 
@@ -1514,7 +1538,7 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 		y -= h;
 
 		/* also a little of space to the background. */
-		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp, do_color_management,
+		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp, display,
 						  x - BUFF_MARGIN_X, y - BUFF_MARGIN_Y, w + BUFF_MARGIN_X, y + h + BUFF_MARGIN_Y);
 
 		/* and draw the text. */
@@ -1531,7 +1555,7 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 		y -= h;
 
 		/* and space for background. */
-		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp, do_color_management,
+		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp, display,
 						  0, y - BUFF_MARGIN_Y, w + BUFF_MARGIN_X, y + h + BUFF_MARGIN_Y);
 
 		BLF_position(mono, x, y + y_ofs, 0.0);
@@ -1547,7 +1571,7 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 		y -= h;
 
 		/* and space for background. */
-		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp, do_color_management,
+		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp, display,
 						  0, y - BUFF_MARGIN_Y, w + BUFF_MARGIN_X, y + h + BUFF_MARGIN_Y);
 
 		BLF_position(mono, x, y + y_ofs, 0.0);
@@ -1563,7 +1587,7 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 		y -= h;
 
 		/* and space for background. */
-		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp, do_color_management,
+		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp, display,
 						  0, y - BUFF_MARGIN_Y, w + BUFF_MARGIN_X, y + h + BUFF_MARGIN_Y);
 
 		BLF_position(mono, x, y + y_ofs, 0.0);
@@ -1578,7 +1602,7 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 		BLF_width_and_height(mono, stamp_data.marker, &w, &h); h = h_fixed;
 
 		/* extra space for background. */
-		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp,  do_color_management,
+		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp,  display,
 						  x - BUFF_MARGIN_X, y - BUFF_MARGIN_Y, w + BUFF_MARGIN_X, y + h + BUFF_MARGIN_Y);
 
 		/* and pad the text. */
@@ -1594,7 +1618,7 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 		BLF_width_and_height(mono, stamp_data.time, &w, &h); h = h_fixed;
 
 		/* extra space for background */
-		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp, do_color_management,
+		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp, display,
 						  x - BUFF_MARGIN_X, y, x + w + BUFF_MARGIN_X, y + h + BUFF_MARGIN_Y);
 
 		/* and pad the text. */
@@ -1609,7 +1633,7 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 		BLF_width_and_height(mono, stamp_data.frame, &w, &h); h = h_fixed;
 
 		/* extra space for background. */
-		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp, do_color_management,
+		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp, display,
 						  x - BUFF_MARGIN_X, y - BUFF_MARGIN_Y, x + w + BUFF_MARGIN_X, y + h + BUFF_MARGIN_Y);
 
 		/* and pad the text. */
@@ -1624,7 +1648,7 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 		BLF_width_and_height(mono, stamp_data.camera, &w, &h); h = h_fixed;
 
 		/* extra space for background. */
-		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp, do_color_management,
+		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp, display,
 						  x - BUFF_MARGIN_X, y - BUFF_MARGIN_Y, x + w + BUFF_MARGIN_X, y + h + BUFF_MARGIN_Y);
 		BLF_position(mono, x, y + y_ofs, 0.0);
 		BLF_draw_buffer(mono, stamp_data.camera);
@@ -1637,7 +1661,7 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 		BLF_width_and_height(mono, stamp_data.cameralens, &w, &h); h = h_fixed;
 
 		/* extra space for background. */
-		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp, do_color_management,
+		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp, display,
 						  x - BUFF_MARGIN_X, y - BUFF_MARGIN_Y, x + w + BUFF_MARGIN_X, y + h + BUFF_MARGIN_Y);
 		BLF_position(mono, x, y + y_ofs, 0.0);
 		BLF_draw_buffer(mono, stamp_data.cameralens);
@@ -1650,7 +1674,7 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 		x = width - w - 2;
 
 		/* extra space for background. */
-		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp, do_color_management,
+		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp, display,
 						  x - BUFF_MARGIN_X, y - BUFF_MARGIN_Y, x + w + BUFF_MARGIN_X, y + h + BUFF_MARGIN_Y);
 
 		/* and pad the text. */
@@ -1666,7 +1690,7 @@ void BKE_stamp_buf(Scene *scene, Object *camera, unsigned char *rect, float *rec
 		y = height - h;
 
 		/* extra space for background. */
-		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp, do_color_management,
+		buf_rectfill_area(rect, rectf, width, height, scene->r.bg_stamp, display,
 						  x - BUFF_MARGIN_X, y - BUFF_MARGIN_Y, x + w + BUFF_MARGIN_X, y + h + BUFF_MARGIN_Y);
 
 		BLF_position(mono, x, y + y_ofs, 0.0);
@@ -1878,12 +1902,12 @@ void BKE_makepicstring(char *string, const char *base, const char *relbase, int
 }
 
 /* used by sequencer too */
-struct anim *openanim(const char *name, int flags, int streamindex)
+struct anim *openanim(const char *name, int flags, int streamindex, char colorspace[IMA_MAX_SPACE])
 {
 	struct anim *anim;
 	struct ImBuf *ibuf;
 
-	anim = IMB_open_anim(name, flags, streamindex);
+	anim = IMB_open_anim(name, flags, streamindex, colorspace);
 	if (anim == NULL) return NULL;
 
 	ibuf = IMB_anim_absolute(anim, 0, IMB_TC_NONE, IMB_PROXY_NONE);
@@ -2226,7 +2250,7 @@ static ImBuf *image_load_sequence_file(Image *ima, ImageUser *iuser, int frame)
 		flag |= IB_premul;
 
 	/* read ibuf */
-	ibuf = IMB_loadiffname(name, flag);
+	ibuf = IMB_loadiffname(name, flag, ima->colorspace_settings.name);
 
 #if 0
 	if (ibuf) {
@@ -2304,7 +2328,6 @@ static ImBuf *image_load_sequence_multilayer(Image *ima, ImageUser *iuser, int f
 			ibuf->flags |= IB_rectfloat;
 			ibuf->mall = IB_rectfloat;
 			ibuf->channels = rpass->channels;
-			ibuf->profile = IB_PROFILE_LINEAR_RGB;
 
 			image_initialize_after_load(ima, ibuf);
 			image_assign_ibuf(ima, ibuf, iuser ? iuser->multi_index : 0, frame);
@@ -2334,7 +2357,7 @@ static ImBuf *image_load_movie_file(Image *ima, ImageUser *iuser, int frame)
 		BKE_image_user_file_path(iuser, ima, str);
 
 		/* FIXME: make several stream accessible in image editor, too*/
-		ima->anim = openanim(str, IB_rect, 0);
+		ima->anim = openanim(str, IB_rect, 0, ima->colorspace_settings.name);
 
 		/* let's initialize this user */
 		if (ima->anim && iuser && iuser->frames == 0)
@@ -2385,8 +2408,8 @@ static ImBuf *image_load_image_file(Image *ima, ImageUser *iuser, int cfra)
 		flag = IB_rect | IB_multilayer;
 		if (ima->flag & IMA_DO_PREMUL) flag |= IB_premul;
 
-		ibuf = IMB_ibImageFromMemory((unsigned char *)ima->packedfile->data,
-		                             ima->packedfile->size, flag, "<packed data>");
+		ibuf = IMB_ibImageFromMemory((unsigned char *)ima->packedfile->data, ima->packedfile->size, flag,
+		                             ima->colorspace_settings.name, "<packed data>");
 	}
 	else {
 		flag = IB_rect | IB_multilayer | IB_metadata;
@@ -2398,7 +2421,7 @@ static ImBuf *image_load_image_file(Image *ima, ImageUser *iuser, int cfra)
 		BKE_image_user_file_path(iuser, ima, str);
 
 		/* read ibuf */
-		ibuf = IMB_loadiffname(str, flag);
+		ibuf = IMB_loadiffname(str, flag, ima->colorspace_settings.name);
 	}
 
 	if (ibuf) {
@@ -2455,7 +2478,6 @@ static ImBuf *image_get_ibuf_multilayer(Image *ima, ImageUser *iuser)
 			ibuf->rect_float = rpass->rect;
 			ibuf->flags |= IB_rectfloat;
 			ibuf->channels = rpass->channels;
-			ibuf->profile = IB_PROFILE_LINEAR_RGB;
 
 			image_assign_ibuf(ima, ibuf, iuser ? iuser->multi_index : IMA_NO_INDEX, 0);
 		}
@@ -2561,6 +2583,12 @@ static ImBuf *image_get_render_result(Image *ima, ImageUser *iuser, void **lock_
 		image_assign_ibuf(ima, ibuf, IMA_NO_INDEX, 0);
 	}
 
+	/* invalidate color managed buffers if render result changed */
+	BLI_lock_thread(LOCK_COLORMANAGE);
+	if (ibuf->x != rres.rectx || ibuf->y != rres.recty || ibuf->rect_float != rectf) {
+		ibuf->userflags |= IB_DISPLAY_BUFFER_INVALID;
+	}
+
 	ibuf->x = rres.rectx;
 	ibuf->y = rres.recty;
 
@@ -2592,8 +2620,8 @@ static ImBuf *image_get_render_result(Image *ima, ImageUser *iuser, void **lock_
 		ibuf->flags &= ~IB_zbuffloat;
 	}
 
-	/* since its possible to access the buffer from the image directly, set the profile [#25073] */
-	ibuf->profile = (iuser->scene->r.color_mgt_flag & R_COLOR_MANAGEMENT) ? IB_PROFILE_LINEAR_RGB : IB_PROFILE_NONE;
+	BLI_unlock_thread(LOCK_COLORMANAGE);
+
 	ibuf->dither = dither;
 
 	if (iuser->scene->r.color_mgt_flag & R_COLOR_MANAGEMENT_PREDIVIDE) {
diff --git a/source/blender/blenkernel/intern/image_gen.c b/source/blender/blenkernel/intern/image_gen.c
index 4d7013b9f73..37572eebed6 100644
--- a/source/blender/blenkernel/intern/image_gen.c
+++ b/source/blender/blenkernel/intern/image_gen.c
@@ -289,7 +289,11 @@ static void checker_board_text(unsigned char *rect, float *rect_float, int width
 
 	BLF_size(mono, 54, 72); /* hard coded size! */
 
-	BLF_buffer(mono, rect_float, rect, width, height, 4, TRUE);
+	/* OCIO_TODO: using NULL as display will assume using sRGB display
+	 *            this is correct since currently generated images are assumed to be in sRGB space,
+	 *            but this would probably needed to be fixed in some way
+	 */
+	BLF_buffer(mono, rect_float, rect, width, height, 4, NULL);
 
 	for (y = 0; y < height; y += step) {
 		text[1] = '1';
diff --git a/source/blender/blenkernel/intern/movieclip.c b/source/blender/blenkernel/intern/movieclip.c
index 1a6a9503887..97d4c150b84 100644
--- a/source/blender/blenkernel/intern/movieclip.c
+++ b/source/blender/blenkernel/intern/movieclip.c
@@ -66,6 +66,7 @@
 
 #include "BKE_animsys.h"
 #include "BKE_constraint.h"
+#include "BKE_colortools.h"
 #include "BKE_library.h"
 #include "BKE_global.h"
 #include "BKE_main.h"
@@ -73,6 +74,7 @@
 #include "BKE_image.h"  /* openanim */
 #include "BKE_tracking.h"
 
+#include "IMB_colormanagement.h"
 #include "IMB_imbuf_types.h"
 #include "IMB_imbuf.h"
 #include "IMB_moviecache.h"
@@ -197,19 +199,25 @@ static ImBuf *movieclip_load_sequence_file(MovieClip *clip, MovieClipUser *user,
 	struct ImBuf *ibuf;
 	char name[FILE_MAX];
 	int loadflag, use_proxy = FALSE;
+	char *colorspace;
 
 	use_proxy = (flag & MCLIP_USE_PROXY) && user->render_size != MCLIP_PROXY_RENDER_SIZE_FULL;
 	if (use_proxy) {
 		int undistort = user->render_flag & MCLIP_PROXY_RENDER_UNDISTORT;
 		get_proxy_fname(clip, user->render_size, undistort, framenr, name);
+
+		/* proxies were built using default color space settings */
+		colorspace = NULL;
 	}
-	else
+	else {
 		get_sequence_fname(clip, framenr, name);
+		colorspace = clip->colorspace_settings.name;
+	}
 
 	loadflag = IB_rect | IB_multilayer;
 
 	/* read ibuf */
-	ibuf = IMB_loadiffname(name, loadflag);
+	ibuf = IMB_loadiffname(name, loadflag, colorspace);
 
 	return ibuf;
 }
@@ -223,7 +231,7 @@ static void movieclip_open_anim_file(MovieClip *clip)
 		BLI_path_abs(str, ID_BLEND_PATH(G.main, &clip->id));
 
 		/* FIXME: make several stream accessible in image editor, too */
-		clip->anim = openanim(str, IB_rect, 0);
+		clip->anim = openanim(str, IB_rect, 0, clip->colorspace_settings.name);
 
 		if (clip->anim) {
 			if (clip->flag & MCLIP_USE_PROXY_CUSTOM_DIR) {
@@ -478,6 +486,7 @@ static MovieClip *movieclip_alloc(const char *name)
 	clip->aspx = clip->aspy = 1.0f;
 
 	BKE_tracking_settings_init(&clip->tracking);
+	BKE_color_managed_colorspace_settings_init(&clip->colorspace_settings);
 
 	clip->proxy.build_size_flag = IMB_PROXY_25;
 	clip->proxy.build_tc_flag = IMB_TC_RECORD_RUN |
diff --git a/source/blender/blenkernel/intern/ocean.c b/source/blender/blenkernel/intern/ocean.c
index b862a824d50..4f3921936e8 100644
--- a/source/blender/blenkernel/intern/ocean.c
+++ b/source/blender/blenkernel/intern/ocean.c
@@ -1117,19 +1117,20 @@ void BKE_simulate_ocean_cache(struct OceanCache *och, int frame)
 	/* if image is already loaded in mem, return */
 	if (och->ibufs_disp[f] != NULL) return;
 
+	/* use default color spaces since we know for sure cache files were saved with default settings too */
 
 	cache_filename(string, och->bakepath, och->relbase, frame, CACHE_TYPE_DISPLACE);
-	och->ibufs_disp[f] = IMB_loadiffname(string, 0);
+	och->ibufs_disp[f] = IMB_loadiffname(string, 0, NULL);
 	//if (och->ibufs_disp[f] == NULL) printf("error loading %s\n", string);
 	//else printf("loaded cache %s\n", string);
 
 	cache_filename(string, och->bakepath, och->relbase, frame, CACHE_TYPE_FOAM);
-	och->ibufs_foam[f] = IMB_loadiffname(string, 0);
+	och->ibufs_foam[f] = IMB_loadiffname(string, 0, NULL);
 	//if (och->ibufs_foam[f] == NULL) printf("error loading %s\n", string);
 	//else printf("loaded cache %s\n", string);
 
 	cache_filename(string, och->bakepath, och->relbase, frame, CACHE_TYPE_NORMAL);
-	och->ibufs_norm[f] = IMB_loadiffname(string, 0);
+	och->ibufs_norm[f] = IMB_loadiffname(string, 0, NULL);
 	//if (och->ibufs_norm[f] == NULL) printf("error loading %s\n", string);
 	//else printf("loaded cache %s\n", string);
 }
@@ -1172,8 +1173,6 @@ void BKE_bake_ocean(struct Ocean *o, struct OceanCache *och, void (*update_cb)(v
 		ibuf_disp = IMB_allocImBuf(res_x, res_y, 32, IB_rectfloat);
 		ibuf_normal = IMB_allocImBuf(res_x, res_y, 32, IB_rectfloat);
 
-		ibuf_disp->profile = ibuf_foam->profile = ibuf_normal->profile = IB_PROFILE_LINEAR_RGB;
-
 		BKE_simulate_ocean(o, och->time[i], och->wave_scale, och->chop_amount);
 
 		/* add new foam */
diff --git a/source/blender/blenkernel/intern/scene.c b/source/blender/blenkernel/intern/scene.c
index 145bd6a88e5..2dec72560a2 100644
--- a/source/blender/blenkernel/intern/scene.c
+++ b/source/blender/blenkernel/intern/scene.c
@@ -57,6 +57,7 @@
 
 #include "BKE_anim.h"
 #include "BKE_animsys.h"
+#include "BKE_colortools.h"
 #include "BKE_depsgraph.h"
 #include "BKE_global.h"
 #include "BKE_group.h"
@@ -76,6 +77,8 @@
 
 #include "RE_engine.h"
 
+#include "IMB_colormanagement.h"
+
 //XXX #include "BIF_previewrender.h"
 //XXX #include "BIF_editseq.h"
 
@@ -132,6 +135,8 @@ Scene *BKE_scene_copy(Scene *sce, int type)
 		MEM_freeN(scen->toolsettings);
 	}
 	else {
+		ImageFormatData *im_format, *im_formatn;
+
 		scen = BKE_libblock_copy(&sce->id);
 		BLI_duplicatelist(&(scen->base), &(sce->base));
 		
@@ -167,6 +172,13 @@ Scene *BKE_scene_copy(Scene *sce, int type)
 			obase = obase->next;
 			base = base->next;
 		}
+
+		/* copy color management settings */
+		im_format = &sce->r.im_format;
+		im_formatn = &scen->r.im_format;
+
+		BKE_color_managed_display_settings_copy(&scen->display_settings, &sce->display_settings);
+		BKE_color_managed_view_settings_copy(&scen->view_settings, &sce->view_settings);
 	}
 
 	/* tool settings */
@@ -332,6 +344,8 @@ void BKE_scene_free(Scene *sce)
 		MEM_freeN(sce->fps_info);
 
 	sound_destroy_scene(sce);
+
+	BKE_color_managed_view_settings_free(&sce->view_settings);
 }
 
 Scene *BKE_scene_add(const char *name)
@@ -372,7 +386,14 @@ Scene *BKE_scene_add(const char *name)
 	sce->r.frs_sec_base = 1;
 	sce->r.edgeint = 10;
 	sce->r.ocres = 128;
+
+	/* OCIO_TODO: for forwards compatibiliy only, so if no tonecurve are used,
+	 *            images would look in the same way as in current blender
+	 *
+	 *            perhaps at some point should be completely deprecated?
+	 */
 	sce->r.color_mgt_flag |= R_COLOR_MANAGEMENT;
+
 	sce->r.gauss = 1.0;
 	
 	/* deprecated but keep for upwards compat */
@@ -546,6 +567,9 @@ Scene *BKE_scene_add(const char *name)
 
 	sound_create_scene(sce);
 
+	BKE_color_managed_display_settings_init(&sce->display_settings);
+	BKE_color_managed_view_settings_init(&sce->view_settings);
+
 	return sce;
 }
 
@@ -1240,3 +1264,19 @@ void BKE_scene_base_flag_from_objects(struct Scene *scene)
 		base = base->next;
 	}
 }
+
+void BKE_scene_disable_color_management(Scene *scene)
+{
+	ColorManagedDisplaySettings *display_settings = &scene->display_settings;
+	ColorManagedViewSettings *view_settings = &scene->view_settings;
+	const char *view;
+
+	/* NOTE: None display with Default view should always exist in OCIO configuration, otherwise it wouldn't work as expected */
+	BLI_strncpy(display_settings->display_device, "None", sizeof(display_settings->display_device));
+
+	view = IMB_colormanagement_view_get_default_name(display_settings->display_device);
+
+	if (view) {
+		BLI_strncpy(view_settings->view_transform, view, sizeof(view_settings->view_transform));
+	}
+}
diff --git a/source/blender/blenkernel/intern/seqeffects.c b/source/blender/blenkernel/intern/seqeffects.c
index 4dbe0b6290c..eaf3ec384c8 100644
--- a/source/blender/blenkernel/intern/seqeffects.c
+++ b/source/blender/blenkernel/intern/seqeffects.c
@@ -52,6 +52,7 @@
 
 #include "IMB_imbuf_types.h"
 #include "IMB_imbuf.h"
+#include "IMB_colormanagement.h"
 
 #include "RNA_access.h"
 
@@ -119,13 +120,13 @@ static ImBuf *prepare_effect_imbufs(SeqRenderData context, ImBuf *ibuf1, ImBuf *
 	}
 	
 	if (ibuf1 && !ibuf1->rect_float && out->rect_float) {
-		IMB_float_from_rect_simple(ibuf1);
+		BKE_sequencer_imbuf_to_sequencer_space(context.scene, ibuf1, TRUE);
 	}
 	if (ibuf2 && !ibuf2->rect_float && out->rect_float) {
-		IMB_float_from_rect_simple(ibuf2);
+		BKE_sequencer_imbuf_to_sequencer_space(context.scene, ibuf2, TRUE);
 	}
 	if (ibuf3 && !ibuf3->rect_float && out->rect_float) {
-		IMB_float_from_rect_simple(ibuf3);
+		BKE_sequencer_imbuf_to_sequencer_space(context.scene, ibuf3, TRUE);
 	}
 	
 	if (ibuf1 && !ibuf1->rect && !out->rect_float) {
@@ -137,7 +138,7 @@ static ImBuf *prepare_effect_imbufs(SeqRenderData context, ImBuf *ibuf1, ImBuf *
 	if (ibuf3 && !ibuf3->rect && !out->rect_float) {
 		IMB_rect_from_float(ibuf3);
 	}
-			
+
 	return out;
 }
 
diff --git a/source/blender/blenkernel/intern/seqmodifier.c b/source/blender/blenkernel/intern/seqmodifier.c
index 65fcd0d85d6..b0dcad64722 100644
--- a/source/blender/blenkernel/intern/seqmodifier.c
+++ b/source/blender/blenkernel/intern/seqmodifier.c
@@ -581,6 +581,11 @@ ImBuf *BKE_sequence_modifier_apply_stack(SeqRenderData context, Sequence *seq, I
 	SequenceModifierData *smd;
 	ImBuf *processed_ibuf = ibuf;
 
+	if (seq->modifiers.first && (seq->flag & SEQ_USE_LINEAR_MODIFIERS)) {
+		processed_ibuf = IMB_dupImBuf(ibuf);
+		BKE_sequencer_imbuf_from_sequencer_space(context.scene, processed_ibuf);
+	}
+
 	for (smd = seq->modifiers.first; smd; smd = smd->next) {
 		SequenceModifierTypeInfo *smti = BKE_sequence_modifier_type_info_get(smd->type);
 
@@ -605,6 +610,10 @@ ImBuf *BKE_sequence_modifier_apply_stack(SeqRenderData context, Sequence *seq, I
 		}
 	}
 
+	if (seq->modifiers.first && (seq->flag & SEQ_USE_LINEAR_MODIFIERS)) {
+		BKE_sequencer_imbuf_to_sequencer_space(context.scene, processed_ibuf, FALSE);
+	}
+
 	return processed_ibuf;
 }
 
diff --git a/source/blender/blenkernel/intern/sequencer.c b/source/blender/blenkernel/intern/sequencer.c
index 2596bf57f05..8d7ca94ed48 100644
--- a/source/blender/blenkernel/intern/sequencer.c
+++ b/source/blender/blenkernel/intern/sequencer.c
@@ -71,6 +71,7 @@
 
 #include "IMB_imbuf.h"
 #include "IMB_imbuf_types.h"
+#include "IMB_colormanagement.h"
 
 #include "BKE_context.h"
 #include "BKE_sound.h"
@@ -308,6 +309,81 @@ void BKE_sequencer_editing_free(Scene *scene)
 	scene->ed = NULL;
 }
 
+/*********************** Sequencer color space functions  *************************/
+
+static void sequencer_imbuf_assign_spaces(Scene *scene, ImBuf *ibuf)
+{
+	IMB_colormanagement_imbuf_assign_float_space(ibuf, &scene->sequencer_colorspace_settings);
+}
+
+void BKE_sequencer_imbuf_to_sequencer_space(Scene *scene, ImBuf *ibuf, int make_float)
+{
+	const char *from_colorspace = IMB_colormanagement_role_colorspace_name_get(COLOR_ROLE_SCENE_LINEAR);
+	const char *to_colorspace = scene->sequencer_colorspace_settings.name;
+	int predivide = ibuf->flags & IB_cm_predivide;
+
+	if (!ibuf->rect_float) {
+		if (make_float && ibuf->rect) {
+			/* when converting byte buffer to float in sequencer we need to make float
+			 * buffer be in sequencer's working space, which is currently only doable
+			 * from linear space.
+			 *
+			 */
+
+			/*
+			 * OCIO_TODO: would be nice to support direct single transform from byte to sequencer's
+			 */
+
+			IMB_float_from_rect(ibuf);
+		}
+		else {
+			/* if there's only byte buffer in image it's already in compositor's working space,
+			 * nothing to do here
+			 */
+
+			return;
+		}
+	}
+
+	if (from_colorspace && from_colorspace[0] != '\0') {
+		if (ibuf->rect)
+			imb_freerectImBuf(ibuf);
+
+		IMB_colormanagement_transform_threaded(ibuf->rect_float, ibuf->x, ibuf->y, ibuf->channels,
+		                                       from_colorspace, to_colorspace, predivide);
+	}
+}
+
+void BKE_sequencer_imbuf_from_sequencer_space(Scene *scene, ImBuf *ibuf)
+{
+	const char *from_colorspace = scene->sequencer_colorspace_settings.name;
+	const char *to_colorspace = IMB_colormanagement_role_colorspace_name_get(COLOR_ROLE_SCENE_LINEAR);
+
+	if (!ibuf->rect_float)
+		return;
+
+	if (to_colorspace && to_colorspace[0] != '\0') {
+		int predivide = ibuf->flags & IB_cm_predivide;
+
+		IMB_colormanagement_transform_threaded(ibuf->rect_float, ibuf->x, ibuf->y, ibuf->channels,
+		                                       from_colorspace, to_colorspace, predivide);
+	}
+}
+
+void BKE_sequencer_pixel_from_sequencer_space_v4(struct Scene *scene, float pixel[4])
+{
+	const char *from_colorspace = scene->sequencer_colorspace_settings.name;
+	const char *to_colorspace = IMB_colormanagement_role_colorspace_name_get(COLOR_ROLE_SCENE_LINEAR);
+
+	if (to_colorspace && to_colorspace[0] != '\0') {
+		IMB_colormanagement_transform_v4(pixel, from_colorspace, to_colorspace);
+	}
+	else {
+		/* if no color management enables fallback to legacy conversion */
+		srgb_to_linearrgb_v4(pixel, pixel);
+	}
+}
+
 /*********************** sequencer pipeline functions *************************/
 
 SeqRenderData BKE_sequencer_new_render_data(Main *bmain, Scene *scene, int rectx, int recty, int preview_render_size)
@@ -597,7 +673,9 @@ void BKE_sequence_reload_new_file(Scene *scene, Sequence *seq, int lock_range)
 			BLI_path_abs(str, G.main->name);
 
 			if (seq->anim) IMB_free_anim(seq->anim);
-			seq->anim = openanim(str, IB_rect | ((seq->flag & SEQ_FILTERY) ? IB_animdeinterlace : 0), seq->streamindex);
+
+			/* OCIO_TODO: support configurable input space for strips */
+			seq->anim = openanim(str, IB_rect | ((seq->flag & SEQ_FILTERY) ? IB_animdeinterlace : 0), seq->streamindex, NULL);
 
 			if (!seq->anim) {
 				return;
@@ -1094,7 +1172,8 @@ static void seq_open_anim_file(Sequence *seq)
 	                 seq->strip->dir, seq->strip->stripdata->name);
 	BLI_path_abs(name, G.main->name);
 	
-	seq->anim = openanim(name, IB_rect | ((seq->flag & SEQ_FILTERY) ? IB_animdeinterlace : 0), seq->streamindex);
+	/* OCIO_TODO: support configurable input space for strips */
+	seq->anim = openanim(name, IB_rect | ((seq->flag & SEQ_FILTERY) ? IB_animdeinterlace : 0), seq->streamindex, NULL);
 
 	if (seq->anim == NULL) {
 		return;
@@ -1200,8 +1279,9 @@ static ImBuf *seq_proxy_fetch(SeqRenderData context, Sequence *seq, int cfra)
 			if (seq_proxy_get_fname(seq, cfra, render_size, name) == 0) {
 				return NULL;
 			}
- 
-			seq->strip->proxy->anim = openanim(name, IB_rect, 0);
+
+			/* proxies are generated in default color space */
+			seq->strip->proxy->anim = openanim(name, IB_rect, 0, NULL);
 		}
 		if (seq->strip->proxy->anim == NULL) {
 			return NULL;
@@ -1219,7 +1299,13 @@ static ImBuf *seq_proxy_fetch(SeqRenderData context, Sequence *seq, int cfra)
 	}
 
 	if (BLI_exists(name)) {
-		return IMB_loadiffname(name, IB_rect);
+		/* OCIO_TODO: support configurable spaces for strips */
+		ImBuf *ibuf = IMB_loadiffname(name, IB_rect, NULL);
+
+		if (ibuf)
+			sequencer_imbuf_assign_spaces(context.scene, ibuf);
+
+		return ibuf;
 	}
 	else {
 		return NULL;
@@ -1257,7 +1343,8 @@ static void seq_proxy_build_frame(SeqRenderData context, Sequence *seq, int cfra
 		ibuf->planes = 24;
 
 	BLI_make_existing_file(name);
-	
+
+	/* OCIO_TODO: support per-strip color space settings */
 	ok = IMB_saveiff(ibuf, name, IB_rect | IB_zbuf | IB_zbuffloat);
 	if (ok == 0) {
 		perror(name);
@@ -1706,7 +1793,7 @@ int BKE_sequencer_input_have_to_preprocess(SeqRenderData UNUSED(context), Sequen
 {
 	float mul;
 
-	if (seq->flag & (SEQ_FILTERY | SEQ_USE_CROP | SEQ_USE_TRANSFORM | SEQ_FLIPX | SEQ_FLIPY | SEQ_MAKE_PREMUL)) {
+	if (seq->flag & (SEQ_FILTERY | SEQ_USE_CROP | SEQ_USE_TRANSFORM | SEQ_FLIPX | SEQ_FLIPY | SEQ_MAKE_PREMUL | SEQ_MAKE_FLOAT)) {
 		return TRUE;
 	}
 
@@ -1826,8 +1913,9 @@ static ImBuf *input_preprocess(SeqRenderData context, Sequence *seq, float cfra,
 	}
 
 	if (seq->flag & SEQ_MAKE_FLOAT) {
-		if (!ibuf->rect_float)
-			IMB_float_from_rect_simple(ibuf);
+		if (!ibuf->rect_float) {
+			BKE_sequencer_imbuf_to_sequencer_space(context.scene, ibuf, TRUE);
+		}
 
 		if (ibuf->rect) {
 			imb_freerectImBuf(ibuf);
@@ -1893,6 +1981,8 @@ static void copy_to_ibuf_still(SeqRenderData context, Sequence *seq, float nr, I
 		 * changing the cached image... */
 		ibuf = IMB_dupImBuf(ibuf);
 
+		sequencer_imbuf_assign_spaces(context.scene, ibuf);
+
 		if (nr == 0) {
 			BKE_sequencer_cache_put(context, seq, seq->start, SEQ_STRIPELEM_IBUF_STARTSTILL, ibuf);
 		} 
@@ -2307,7 +2397,7 @@ static ImBuf *seq_render_scene_strip(SeqRenderData context, Sequence *seq, float
 		/* opengl offscreen render */
 		BKE_scene_update_for_newframe(context.bmain, scene, scene->lay);
 		ibuf = sequencer_view3d_cb(scene, camera, context.rectx, context.recty,
-		                           IB_rect, context.scene->r.seq_prev_type, TRUE, err_out);
+		                           IB_rect, context.scene->r.seq_prev_type, TRUE, FALSE, err_out);
 		if (ibuf == NULL) {
 			fprintf(stderr, "seq_render_scene_strip failed to get opengl buffer: %s\n", err_out);
 		}
@@ -2338,11 +2428,7 @@ static ImBuf *seq_render_scene_strip(SeqRenderData context, Sequence *seq, float
 			}
 
 			/* float buffers in the sequencer are not linear */
-			if (scene->r.color_mgt_flag & R_COLOR_MANAGEMENT)
-				ibuf->profile = IB_PROFILE_LINEAR_RGB;
-			else
-				ibuf->profile = IB_PROFILE_NONE;
-			IMB_convert_profile(ibuf, IB_PROFILE_SRGB);			
+			BKE_sequencer_imbuf_to_sequencer_space(context.scene, ibuf, FALSE);
 		}
 		else if (rres.rect32) {
 			ibuf = IMB_allocImBuf(rres.rectx, rres.recty, 32, IB_rect);
@@ -2442,14 +2528,14 @@ static ImBuf *do_render_strip_uncached(SeqRenderData context, Sequence *seq, flo
 				BLI_path_abs(name, G.main->name);
 			}
 
-			if (s_elem && (ibuf = IMB_loadiffname(name, IB_rect))) {
+			/* OCIO_TODO: support configurable space for image strips */
+			if (s_elem && (ibuf = IMB_loadiffname(name, IB_rect, NULL))) {
 				/* we don't need both (speed reasons)! */
 				if (ibuf->rect_float && ibuf->rect)
 					imb_freerectImBuf(ibuf);
 
 				/* all sequencer color is done in SRGB space, linear gives odd crossfades */
-				if (ibuf->profile == IB_PROFILE_LINEAR_RGB)
-					IMB_convert_profile(ibuf, IB_PROFILE_NONE);
+				BKE_sequencer_imbuf_to_sequencer_space(context.scene, ibuf, FALSE);
 
 				copy_to_ibuf_still(context, seq, nr, ibuf);
 
@@ -2497,6 +2583,7 @@ static ImBuf *do_render_strip_uncached(SeqRenderData context, Sequence *seq, flo
 		case SEQ_TYPE_MOVIECLIP:
 		{
 			ibuf = seq_render_movieclip_strip(context, seq, nr);
+			sequencer_imbuf_assign_spaces(context.scene, ibuf);
 
 			if (ibuf && use_preprocess) {
 				ImBuf *i = IMB_dupImBuf(ibuf);
@@ -2520,6 +2607,9 @@ static ImBuf *do_render_strip_uncached(SeqRenderData context, Sequence *seq, flo
 		}
 	}
 
+	if (ibuf)
+		sequencer_imbuf_assign_spaces(context.scene, ibuf);
+
 	return ibuf;
 }
 
@@ -2561,8 +2651,10 @@ static ImBuf *seq_render_strip(SeqRenderData context, Sequence *seq, float cfra)
 		}
 	}
 
-	if (ibuf == NULL)
+	if (ibuf == NULL) {
 		ibuf = IMB_allocImBuf(context.rectx, context.recty, 32, IB_rect);
+		sequencer_imbuf_assign_spaces(context.scene, ibuf);
+	}
 
 	if (ibuf->x != context.rectx || ibuf->y != context.recty)
 		use_preprocess = TRUE;
@@ -2641,12 +2733,12 @@ static ImBuf *seq_render_strip_stack(SeqRenderData context, ListBase *seqbasep,
 	
 	if (count == 1) {
 		out = seq_render_strip(context, seq_arr[0], cfra);
+
 		BKE_sequencer_cache_put(context, seq_arr[0], cfra, SEQ_STRIPELEM_IBUF_COMP, out);
 
 		return out;
 	}
 
-
 	for (i = count - 1; i >= 0; i--) {
 		int early_out;
 		Sequence *seq = seq_arr[i];
@@ -3946,7 +4038,8 @@ Sequence *BKE_sequencer_add_movie_strip(bContext *C, ListBase *seqbasep, SeqLoad
 	BLI_strncpy(path, seq_load->path, sizeof(path));
 	BLI_path_abs(path, G.main->name);
 
-	an = openanim(path, IB_rect, 0);
+	/* OCIO_TODO: support configurable input space for strips */
+	an = openanim(path, IB_rect, 0, NULL);
 
 	if (an == NULL)
 		return NULL;
diff --git a/source/blender/blenkernel/intern/tracking.c b/source/blender/blenkernel/intern/tracking.c
index ff48f5db9aa..97ebc3a90ba 100644
--- a/source/blender/blenkernel/intern/tracking.c
+++ b/source/blender/blenkernel/intern/tracking.c
@@ -1627,7 +1627,6 @@ ImBuf *BKE_tracking_sample_pattern(int frame_width, int frame_height, ImBuf *sea
 	float *mask = NULL;
 
 	pattern_ibuf = IMB_allocImBuf(num_samples_x, num_samples_y, 32, IB_rectfloat);
-	pattern_ibuf->profile = IB_PROFILE_LINEAR_RGB;
 
 	if (!search_ibuf->rect_float) {
 		IMB_float_from_rect(search_ibuf);
@@ -1722,7 +1721,6 @@ ImBuf *BKE_tracking_get_search_imbuf(ImBuf *ibuf, MovieTrackingTrack *track, Mov
 	h = (marker->search_max[1] - marker->search_min[1]) * ibuf->y;
 
 	searchibuf = IMB_allocImBuf(w, h, 32, ibuf->rect_float ? IB_rectfloat : IB_rect);
-	searchibuf->profile = ibuf->profile;
 
 	IMB_rectcpy(searchibuf, ibuf, 0, 0, x, y, w, h);
 
@@ -3317,7 +3315,6 @@ static ImBuf *stabilization_allocate_ibuf(ImBuf *cacheibuf, ImBuf *srcibuf, int
 	}
 	else {
 		cacheibuf = IMB_allocImBuf(srcibuf->x, srcibuf->y, srcibuf->planes, flags);
-		cacheibuf->profile = srcibuf->profile;
 	}
 
 	return cacheibuf;