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Implement GPU-side dither 

Summary:
Uses some magic pseudo-random which is actually a
texture coordinate hashing function.

TODOs:
- Dither noise is the same for all the frames.
- It's different from Floyd's dither we've been
  using before.
- Currently CPU and GPU dithering used different
  implementation. Ideally we need to use the same
  dither in CPU.

Reviewers: brecht

Reviewed By: brecht

Differential Revision: http://developer.blender.org/D58
This commit is contained in:
Sergey Sharybin 2013-12-13 12:36:45 +06:00
parent 669b590229
commit 5a91df3271
13 changed files with 138 additions and 93 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
intern/opencolorio/fallback_impl.cc
View File

@ -419,7 +419,8 @@ bool FallbackImpl::supportGLSLDraw(void)
}
bool FallbackImpl::setupGLSLDraw(struct OCIO_GLSLDrawState ** /*state_r*/, OCIO_ConstProcessorRcPtr * /*processor*/,
OCIO_CurveMappingSettings * /*curve_mapping_settings*/, bool /*predivide*/)
OCIO_CurveMappingSettings * /*curve_mapping_settings*/,
float /*dither*/, bool /*predivide*/)
{
return false;
}

40
intern/opencolorio/gpu_shader_display_transform.glsl
View File

@ -2,6 +2,10 @@ uniform sampler2D image_texture;
uniform sampler3D lut3d_texture;
uniform bool predivide;
#ifdef USE_DITHER
uniform float dither;
#endif
#ifdef USE_CURVE_MAPPING
/* Curve mapping parameters
*
@ -102,6 +106,33 @@ vec4 curvemapping_evaluate_premulRGBF(vec4 col)
}
#endif
#ifdef USE_DITHER
float dither_random_value(vec2 co)
{
return fract(sin(dot(co.xy, vec2(12.9898, 78.233))) * 43758.5453) * 0.005 * dither;
}
vec2 round_to_pixel(vec2 st)
{
vec2 result;
vec2 size = textureSize(image_texture, 0);
result.x = float(int(st.x * size.x)) / size.x;
result.y = float(int(st.y * size.y)) / size.y;
return result;
}
vec4 apply_dither(vec2 st, vec4 col)
{
vec4 result;
float random_value = dither_random_value(round_to_pixel(st));
result.r = col.r + random_value;
result.g = col.g + random_value;
result.b = col.b + random_value;
result.a = col.a;
return result;
}
#endif
void main()
{
vec4 col = texture2D(image_texture, gl_TexCoord[0].st);
@ -119,5 +150,12 @@ void main()
* and the reason is simple -- opengl is always configured
* for straight alpha at this moment
*/
gl_FragColor = OCIODisplay(col, lut3d_texture);
vec4 result = OCIODisplay(col, lut3d_texture);
#ifdef USE_DITHER
result = apply_dither(gl_TexCoord[0].st, result);
#endif
gl_FragColor = result;
}

4
intern/opencolorio/ocio_capi.cc
View File

@ -324,9 +324,9 @@ int OCIO_supportGLSLDraw(void)
}
int OCIO_setupGLSLDraw(struct OCIO_GLSLDrawState **state_r, OCIO_ConstProcessorRcPtr *processor,
OCIO_CurveMappingSettings *curve_mapping_settings, bool predivide)
OCIO_CurveMappingSettings *curve_mapping_settings, float dither, bool predivide)
{
return (int) impl->setupGLSLDraw(state_r, processor, curve_mapping_settings, predivide);
return (int) impl->setupGLSLDraw(state_r, processor, curve_mapping_settings, dither, predivide);
}
void OCIO_finishGLSLDraw(struct OCIO_GLSLDrawState *state)

2
intern/opencolorio/ocio_capi.h
View File

@ -189,7 +189,7 @@ void OCIO_matrixTransformScale(float *m44, float *offset4, const float *scale4);
int OCIO_supportGLSLDraw(void);
int OCIO_setupGLSLDraw(struct OCIO_GLSLDrawState **state_r, OCIO_ConstProcessorRcPtr *processor,
OCIO_CurveMappingSettings *curve_mapping_settings, bool predivide);
OCIO_CurveMappingSettings *curve_mapping_settings, float dither, bool predivide);
void OCIO_finishGLSLDraw(struct OCIO_GLSLDrawState *state);
void OCIO_freeOGLState(struct OCIO_GLSLDrawState *state);

6
intern/opencolorio/ocio_impl.h
View File

@ -107,7 +107,7 @@ public:
virtual bool supportGLSLDraw(void) = 0;
virtual bool setupGLSLDraw(struct OCIO_GLSLDrawState **state_r, OCIO_ConstProcessorRcPtr *processor,
OCIO_CurveMappingSettings *curve_mapping_settings, bool predivide) = 0;
OCIO_CurveMappingSettings *curve_mapping_settings, float dither, bool predivide) = 0;
virtual void finishGLSLDraw(struct OCIO_GLSLDrawState *state) = 0;
virtual void freeGLState(struct OCIO_GLSLDrawState *state_r) = 0;
@ -194,7 +194,7 @@ public:
bool supportGLSLDraw(void);
bool setupGLSLDraw(struct OCIO_GLSLDrawState **state_r, OCIO_ConstProcessorRcPtr *processor,
OCIO_CurveMappingSettings *curve_mapping_settings, bool predivide);
OCIO_CurveMappingSettings *curve_mapping_settings, float dither, bool predivide);
void finishGLSLDraw(struct OCIO_GLSLDrawState *state);
void freeGLState(struct OCIO_GLSLDrawState *state_r);
@ -282,7 +282,7 @@ public:
bool supportGLSLDraw(void);
bool setupGLSLDraw(struct OCIO_GLSLDrawState **state_r, OCIO_ConstProcessorRcPtr *processor,
OCIO_CurveMappingSettings *curve_mapping_settings, bool predivide);
OCIO_CurveMappingSettings *curve_mapping_settings, float dither, bool predivide);
void finishGLSLDraw(struct OCIO_GLSLDrawState *state);
void freeGLState(struct OCIO_GLSLDrawState *state_r);

23
intern/opencolorio/ocio_impl_glsl.cc
View File

@ -33,6 +33,7 @@
*
*/
#include <limits>
#include <sstream>
#include <string.h>
@ -62,6 +63,8 @@ typedef struct OCIO_GLSLDrawState {
float *lut3d; /* 3D LUT table */
bool dither_used;
bool curve_mapping_used;
bool curve_mapping_texture_allocated;
bool curve_mapping_texture_valid;
@ -229,10 +232,12 @@ bool OCIOImpl::supportGLSLDraw()
* restore OpenGL context to it's pre-GLSL draw state.
*/
bool OCIOImpl::setupGLSLDraw(OCIO_GLSLDrawState **state_r, OCIO_ConstProcessorRcPtr *processor,
OCIO_CurveMappingSettings *curve_mapping_settings, bool predivide)
OCIO_CurveMappingSettings *curve_mapping_settings,
float dither, bool predivide)
{
ConstProcessorRcPtr ocio_processor = *(ConstProcessorRcPtr *) processor;
bool use_curve_mapping = curve_mapping_settings != NULL;
bool use_dither = dither > std::numeric_limits<float>::epsilon();
/* Create state if needed. */
OCIO_GLSLDrawState *state;
@ -267,7 +272,7 @@ bool OCIOImpl::setupGLSLDraw(OCIO_GLSLDrawState **state_r, OCIO_ConstProcessorRc
/* Step 1: Create a GPU Shader Description */
GpuShaderDesc shaderDesc;
shaderDesc.setLanguage(GPU_LANGUAGE_GLSL_1_0);
shaderDesc.setLanguage(GPU_LANGUAGE_GLSL_1_3);
shaderDesc.setFunctionName("OCIODisplay");
shaderDesc.setLut3DEdgeLen(LUT3D_EDGE_SIZE);
@ -297,7 +302,8 @@ bool OCIOImpl::setupGLSLDraw(OCIO_GLSLDrawState **state_r, OCIO_ConstProcessorRc
std::string shaderCacheID = ocio_processor->getGpuShaderTextCacheID(shaderDesc);
if (state->program == 0 ||
shaderCacheID != state->shadercacheid ||
use_curve_mapping != state->curve_mapping_used)
use_curve_mapping != state->curve_mapping_used ||
use_dither != state->dither_used)
{
state->shadercacheid = shaderCacheID;
@ -311,6 +317,12 @@ bool OCIOImpl::setupGLSLDraw(OCIO_GLSLDrawState **state_r, OCIO_ConstProcessorRc
std::ostringstream os;
os << "#version 130\n";
if (use_dither) {
os << "#define USE_DITHER\n";
}
if (use_curve_mapping) {
os << "#define USE_CURVE_MAPPING\n";
}
@ -325,6 +337,7 @@ bool OCIOImpl::setupGLSLDraw(OCIO_GLSLDrawState **state_r, OCIO_ConstProcessorRc
}
state->curve_mapping_used = use_curve_mapping;
state->dither_used = use_dither;
}
if (state->program) {
@ -344,6 +357,10 @@ bool OCIOImpl::setupGLSLDraw(OCIO_GLSLDrawState **state_r, OCIO_ConstProcessorRc
glUniform1i(glGetUniformLocation(state->program, "lut3d_texture"), 1);
glUniform1i(glGetUniformLocation(state->program, "predivide"), predivide);
if (use_dither) {
glUniform1f(glGetUniformLocation(state->program, "dither"), dither);
}
if (use_curve_mapping) {
glUniform1i(glGetUniformLocation(state->program, "curve_mapping_texture"), 2);
glUniform1i(glGetUniformLocation(state->program, "curve_mapping_lut_size"), curve_mapping_settings->lut_size);

2
source/blender/editors/render/render_internal.c
View File

@ -1150,7 +1150,7 @@ void render_view3d_draw(RenderEngine *engine, const bContext *C)
/* Try using GLSL display transform. */
if (force_fallback == false) {
if (IMB_colormanagement_setup_glsl_draw(&scene->view_settings, &scene->display_settings, true)) {
if (IMB_colormanagement_setup_glsl_draw(&scene->view_settings, &scene->display_settings, 0.0f, true)) {
glEnable(GL_BLEND);
glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
glaDrawPixelsTex(rres.xof, rres.yof, rres.rectx, rres.recty, GL_RGBA, GL_FLOAT,

12
source/blender/editors/screen/glutil.c
View File

@ -1044,9 +1044,6 @@ void glaDrawImBuf_glsl(ImBuf *ibuf, float x, float y, int zoomfilter,
if (ibuf->rect == NULL && ibuf->rect_float == NULL)
return;
/* Dithering is not supported on GLSL yet */
force_fallback |= ibuf->dither != 0.0f;
/* Single channel images could not be transformed using GLSL yet */
force_fallback |= ibuf->channels == 1;
@ -1093,15 +1090,18 @@ void glaDrawImBuf_glsl(ImBuf *ibuf, float x, float y, int zoomfilter,
if (ibuf->rect_float) {
if (ibuf->float_colorspace) {
ok = IMB_colormanagement_setup_glsl_draw_from_space(view_settings, display_settings,
ibuf->float_colorspace, true);
ibuf->float_colorspace,
ibuf->dither, true);
}
else {
ok = IMB_colormanagement_setup_glsl_draw(view_settings, display_settings, true);
ok = IMB_colormanagement_setup_glsl_draw(view_settings, display_settings,
ibuf->dither, true);
}
}
else {
ok = IMB_colormanagement_setup_glsl_draw_from_space(view_settings, display_settings,
ibuf->rect_colorspace, false);
ibuf->rect_colorspace,
ibuf->dither, false);
}
if (ok) {

6
source/blender/editors/space_sequencer/sequencer_draw.c
View File

@ -1086,10 +1086,10 @@ void draw_image_seq(const bContext *C, Scene *scene, ARegion *ar, SpaceSeq *sseq
type = GL_FLOAT;
if (ibuf->float_colorspace) {
glsl_used = IMB_colormanagement_setup_glsl_draw_from_space_ctx(C, ibuf->float_colorspace, true);
glsl_used = IMB_colormanagement_setup_glsl_draw_from_space_ctx(C, ibuf->float_colorspace, ibuf->dither, true);
}
else {
glsl_used = IMB_colormanagement_setup_glsl_draw_ctx(C, true);
glsl_used = IMB_colormanagement_setup_glsl_draw_ctx(C, ibuf->dither, true);
}
}
else if (ibuf->rect) {
@ -1097,7 +1097,7 @@ void draw_image_seq(const bContext *C, Scene *scene, ARegion *ar, SpaceSeq *sseq
format = GL_RGBA;
type = GL_UNSIGNED_BYTE;
glsl_used = IMB_colormanagement_setup_glsl_draw_from_space_ctx(C, ibuf->rect_colorspace, false);
glsl_used = IMB_colormanagement_setup_glsl_draw_from_space_ctx(C, ibuf->rect_colorspace, ibuf->dither, false);
}
else {
format = GL_RGBA;

9
source/blender/imbuf/IMB_colormanagement.h
View File

@ -178,16 +178,17 @@ bool IMB_colormanagement_support_glsl_draw(const struct ColorManagedViewSettings
/* Configures GLSL shader for conversion from scene linear to display space */
bool IMB_colormanagement_setup_glsl_draw(const struct ColorManagedViewSettings *view_settings,
const struct ColorManagedDisplaySettings *display_settings,
bool predivide);
float dither, bool predivide);
/* Same as above, but display space conversion happens from a specified space */
bool IMB_colormanagement_setup_glsl_draw_from_space(const struct ColorManagedViewSettings *view_settings,
const struct ColorManagedDisplaySettings *display_settings,
struct ColorSpace *colorspace,
bool predivide);
float dither, bool predivide);
/* Same as setup_glsl_draw, but color management settings are guessing from a given context */
bool IMB_colormanagement_setup_glsl_draw_ctx(const struct bContext *C, bool predivide);
bool IMB_colormanagement_setup_glsl_draw_ctx(const struct bContext *C, float dither, bool predivide);
/* Same as setup_glsl_draw_from_space, but color management settings are guessing from a given context */
bool IMB_colormanagement_setup_glsl_draw_from_space_ctx(const struct bContext *C, struct ColorSpace *colorspace, bool predivide);
bool IMB_colormanagement_setup_glsl_draw_from_space_ctx(const struct bContext *C, struct ColorSpace *colorspace,
float dither, bool predivide);
/* Finish GLSL-based display space conversion */
void IMB_colormanagement_finish_glsl_draw(void);

19
source/blender/imbuf/intern/colormanagement.c
View File

@ -3091,7 +3091,8 @@ bool IMB_colormanagement_support_glsl_draw(const ColorManagedViewSettings *UNUSE
*/
bool IMB_colormanagement_setup_glsl_draw_from_space(const ColorManagedViewSettings *view_settings,
const ColorManagedDisplaySettings *display_settings,
struct ColorSpace *from_colorspace, bool predivide)
struct ColorSpace *from_colorspace,
float dither, bool predivide)
{
ColorManagedViewSettings default_view_settings;
const ColorManagedViewSettings *applied_view_settings;
@ -3114,33 +3115,35 @@ bool IMB_colormanagement_setup_glsl_draw_from_space(const ColorManagedViewSettin
return OCIO_setupGLSLDraw(&global_glsl_state.ocio_glsl_state, global_glsl_state.processor,
global_glsl_state.use_curve_mapping ? &global_glsl_state.curve_mapping_settings : NULL,
predivide);
dither, predivide);
}
/* Configures GLSL shader for conversion from scene linear to display space */
bool IMB_colormanagement_setup_glsl_draw(const ColorManagedViewSettings *view_settings,
const ColorManagedDisplaySettings *display_settings,
bool predivide)
float dither, bool predivide)
{
return IMB_colormanagement_setup_glsl_draw_from_space(view_settings, display_settings,
NULL, predivide);
NULL, dither, predivide);
}
/* Same as setup_glsl_draw_from_space, but color management settings are guessing from a given context */
bool IMB_colormanagement_setup_glsl_draw_from_space_ctx(const struct bContext *C, struct ColorSpace *from_colorspace, bool predivide)
bool IMB_colormanagement_setup_glsl_draw_from_space_ctx(const bContext *C, struct ColorSpace *from_colorspace,
float dither, bool predivide)
{
ColorManagedViewSettings *view_settings;
ColorManagedDisplaySettings *display_settings;
IMB_colormanagement_display_settings_from_ctx(C, &view_settings, &display_settings);
return IMB_colormanagement_setup_glsl_draw_from_space(view_settings, display_settings, from_colorspace, predivide);
return IMB_colormanagement_setup_glsl_draw_from_space(view_settings, display_settings, from_colorspace,
dither, predivide);
}
/* Same as setup_glsl_draw, but color management settings are guessing from a given context */
bool IMB_colormanagement_setup_glsl_draw_ctx(const bContext *C, bool predivide)
bool IMB_colormanagement_setup_glsl_draw_ctx(const bContext *C, float dither, bool predivide)
{
return IMB_colormanagement_setup_glsl_draw_from_space_ctx(C, NULL, predivide);
return IMB_colormanagement_setup_glsl_draw_from_space_ctx(C, NULL, dither, predivide);
}
/* Finish GLSL-based display space conversion */

104
source/blender/imbuf/intern/divers.c
View File

@ -31,7 +31,6 @@
* \ingroup imbuf
*/
#include "BLI_rand.h"
#include "BLI_math.h"
#include "BLI_utildefines.h"
@ -107,63 +106,33 @@ void IMB_interlace(ImBuf *ibuf)
/************************* Floyd-Steinberg dithering *************************/
typedef struct DitherContext {
int *error_buf, *e;
int v[4], v0[4], v1[4];
float f;
float dither;
} DitherContext;
static DitherContext *create_dither_context(int w, float factor)
static DitherContext *create_dither_context(float dither)
{
DitherContext *di;
int i;
di = MEM_callocN(sizeof(DitherContext), "dithering context");
di->f = factor / 16.0f;
di->error_buf = MEM_callocN(4 * (w + 1) * sizeof(int), "dithering error");
di->e = di->error_buf;
for (i = 0; i < 4; ++i)
di->v[i] = di->v0[i] = di->v1[i] = 1024.0f * (BLI_frand() - 0.5f);
di = MEM_mallocN(sizeof(DitherContext), "dithering context");
di->dither = dither;
return di;
}
static void clear_dither_context(DitherContext *di)
{
MEM_freeN(di->error_buf);
MEM_freeN(di);
}
static void dither_finish_row(DitherContext *di)
MINLINE float dither_random_value(float s, float t)
{
int i;
static float vec[2] = {12.9898f, 78.233f};
float st[2];
float value;
copy_v2_fl2(st, s, t);
for (i = 0; i < 4; i++)
di->v[i] = di->v0[i] = di->v1[i] = 0;
di->e = di->error_buf;
}
MINLINE unsigned char dither_value(unsigned short v_in, DitherContext *di, int i)
{
int dv, d2;
unsigned char v_out;
di->v[i] = v_in + (2 * di->v[i] + di->e[4]) * di->f;
CLAMP(di->v[i], 0, 0xFF00);
v_out = USHORTTOUCHAR(di->v[i]);
di->v[i] -= v_out << 8;
dv = di->v[i];
d2 = di->v[i] << 1;
di->v[i] += d2;
*(di->e++) = di->v[i] + di->v0[i];
di->v[i] += d2;
di->v0[i] = di->v[i] + di->v1[i];
di->v1[i] = dv;
di->v[i] += d2;
return v_out;
value = sinf(dot_v2v2(st, vec)) * 43758.5453f;
return value - floor(value);
}
/************************* Generic Buffer Conversion *************************/
@ -176,18 +145,32 @@ MINLINE void ushort_to_byte_v4(uchar b[4], const unsigned short us[4])
b[3] = USHORTTOUCHAR(us[3]);
}
MINLINE void ushort_to_byte_dither_v4(uchar b[4], const unsigned short us[4], DitherContext *di)
MINLINE unsigned char ftochar(float value)
{
b[0] = dither_value(us[0], di, 0);
b[1] = dither_value(us[1], di, 1);
b[2] = dither_value(us[2], di, 2);
b[3] = dither_value(us[3], di, 3);
return FTOCHAR(value);
}
MINLINE void float_to_byte_dither_v4(uchar b[4], const float f[4], DitherContext *di)
MINLINE void ushort_to_byte_dither_v4(uchar b[4], const unsigned short us[4], DitherContext *di, float s, float t)
{
unsigned short us[4] = {FTOUSHORT(f[0]), FTOUSHORT(f[1]), FTOUSHORT(f[2]), FTOUSHORT(f[3])};
ushort_to_byte_dither_v4(b, us, di);
#define USHORTTOFLOAT(val) ((float)val / 65535.0f)
float dither_value = dither_random_value(s, t) * 0.005f * di->dither;
b[0] = ftochar(dither_value + USHORTTOFLOAT(us[0]));
b[1] = ftochar(dither_value + USHORTTOFLOAT(us[1]));
b[2] = ftochar(dither_value + USHORTTOFLOAT(us[2]));
b[3] = USHORTTOUCHAR(us[3]);
#undef USHORTTOFLOAT
}
MINLINE void float_to_byte_dither_v4(uchar b[4], const float f[4], DitherContext *di, float s, float t)
{
float dither_value = dither_random_value(s, t) * 0.005f * di->dither;
b[0] = ftochar(dither_value + f[0]);
b[1] = ftochar(dither_value + f[1]);
b[2] = ftochar(dither_value + f[2]);
b[3] = FTOCHAR(f[3]);
}
/* float to byte pixels, output 4-channel RGBA */
@ -198,15 +181,19 @@ void IMB_buffer_byte_from_float(uchar *rect_to, const float *rect_from,
float tmp[4];
int x, y;
DitherContext *di = NULL;
float inv_width = 1.0f / width,
inv_height = 1.0f / height;
/* we need valid profiles */
BLI_assert(profile_to != IB_PROFILE_NONE);
BLI_assert(profile_from != IB_PROFILE_NONE);
if (dither)
di = create_dither_context(width, dither);
di = create_dither_context(dither);
for (y = 0; y < height; y++) {
float t = y * inv_height;
if (channels_from == 1) {
/* single channel input */
const float *from = rect_from + stride_from * y;
@ -256,12 +243,12 @@ void IMB_buffer_byte_from_float(uchar *rect_to, const float *rect_from,
if (dither && predivide) {
for (x = 0; x < width; x++, from += 4, to += 4) {
premul_to_straight_v4_v4(straight, from);
float_to_byte_dither_v4(to, straight, di);
float_to_byte_dither_v4(to, straight, di, (float) x * inv_width, t);
}
}
else if (dither) {
for (x = 0; x < width; x++, from += 4, to += 4)
float_to_byte_dither_v4(to, from, di);
float_to_byte_dither_v4(to, from, di, (float) x * inv_width, t);
}
else if (predivide) {
for (x = 0; x < width; x++, from += 4, to += 4) {
@ -283,13 +270,13 @@ void IMB_buffer_byte_from_float(uchar *rect_to, const float *rect_from,
for (x = 0; x < width; x++, from += 4, to += 4) {
premul_to_straight_v4_v4(straight, from);
linearrgb_to_srgb_ushort4(us, from);
ushort_to_byte_dither_v4(to, us, di);
ushort_to_byte_dither_v4(to, us, di, (float) x * inv_width, t);
}
}
else if (dither) {
for (x = 0; x < width; x++, from += 4, to += 4) {
linearrgb_to_srgb_ushort4(us, from);
ushort_to_byte_dither_v4(to, us, di);
ushort_to_byte_dither_v4(to, us, di, (float) x * inv_width, t);
}
}
else if (predivide) {
@ -311,13 +298,13 @@ void IMB_buffer_byte_from_float(uchar *rect_to, const float *rect_from,
if (dither && predivide) {
for (x = 0; x < width; x++, from += 4, to += 4) {
srgb_to_linearrgb_predivide_v4(tmp, from);
float_to_byte_dither_v4(to, tmp, di);
float_to_byte_dither_v4(to, tmp, di, (float) x * inv_width, t);
}
}
else if (dither) {
for (x = 0; x < width; x++, from += 4, to += 4) {
srgb_to_linearrgb_v4(tmp, from);
float_to_byte_dither_v4(to, tmp, di);
float_to_byte_dither_v4(to, tmp, di, (float) x * inv_width, t);
}
}
else if (predivide) {
@ -334,9 +321,6 @@ void IMB_buffer_byte_from_float(uchar *rect_to, const float *rect_from,
}
}
}
if (dither)
dither_finish_row(di);
}
if (dither)

1
source/blender/makesrna/intern/rna_render.c
View File

@ -73,6 +73,7 @@ static void engine_bind_display_space_shader(RenderEngine *UNUSED(engine), Scene
{
IMB_colormanagement_setup_glsl_draw(&scene->view_settings,
&scene->display_settings,
scene->r.dither_intensity,
false);
}