blender/intern/opencolorio/fallback_impl.cc
Sergey Sharybin 35d490b3f1 OCIO: Implement exposure/gamma for fallback implementation
Quite handy for debugging.

Unfortunately, this doesn't support viewport tweaks yet since those
require GLSL for colorspace conversion. Maybe this will be implemented
as well one day in the future..
2016-12-02 16:57:00 +01:00

678 lines
18 KiB
C++

/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2012 Blender Foundation.
* All rights reserved.
*
* Contributor(s): Brecht van Lommel
*
* ***** END GPL LICENSE BLOCK *****
*/
#include <algorithm>
#include <cstring>
#include "MEM_guardedalloc.h"
#include "BLI_math_color.h"
#include "BLI_math_vector.h"
#include "ocio_impl.h"
using std::max;
#define CONFIG_DEFAULT ((OCIO_ConstConfigRcPtr*)1)
enum TransformType {
TRANSFORM_LINEAR_TO_SRGB,
TRANSFORM_SRGB_TO_LINEAR,
TRANSFORM_MATRIX,
TRANSFORM_EXPONENT,
TRANSFORM_UNKNOWN,
};
#define COLORSPACE_LINEAR ((OCIO_ConstColorSpaceRcPtr*)1)
#define COLORSPACE_SRGB ((OCIO_ConstColorSpaceRcPtr*)2)
typedef struct OCIO_PackedImageDescription {
float *data;
long width;
long height;
long numChannels;
long chanStrideBytes;
long xStrideBytes;
long yStrideBytes;
} OCIO_PackedImageDescription;
struct FallbackTransform {
FallbackTransform()
: type(TRANSFORM_UNKNOWN),
linear_transform(NULL),
display_transform(NULL)
{
}
~FallbackTransform()
{
delete linear_transform;
delete display_transform;
}
void applyRGB(float *pixel)
{
if (type == TRANSFORM_LINEAR_TO_SRGB) {
applyLinearRGB(pixel);
linearrgb_to_srgb_v3_v3(pixel, pixel);
applyDisplayRGB(pixel);
}
else if (type == TRANSFORM_SRGB_TO_LINEAR) {
srgb_to_linearrgb_v3_v3(pixel, pixel);
}
else if (type == TRANSFORM_EXPONENT) {
pixel[0] = powf(max(0.0f, pixel[0]), exponent[0]);
pixel[1] = powf(max(0.0f, pixel[1]), exponent[1]);
pixel[2] = powf(max(0.0f, pixel[2]), exponent[2]);
}
else if (type == TRANSFORM_MATRIX) {
float r = pixel[0];
float g = pixel[1];
float b = pixel[2];
pixel[0] = r*matrix[0] + g*matrix[1] + b*matrix[2];
pixel[1] = r*matrix[4] + g*matrix[5] + b*matrix[6];
pixel[2] = r*matrix[8] + g*matrix[9] + b*matrix[10];
pixel[0] += offset[0];
pixel[1] += offset[1];
pixel[2] += offset[2];
}
}
void applyRGBA(float *pixel)
{
if (type == TRANSFORM_LINEAR_TO_SRGB) {
applyLinearRGBA(pixel);
linearrgb_to_srgb_v4(pixel, pixel);
applyDisplayRGBA(pixel);
}
else if (type == TRANSFORM_SRGB_TO_LINEAR) {
srgb_to_linearrgb_v4(pixel, pixel);
}
else if (type == TRANSFORM_EXPONENT) {
pixel[0] = powf(max(0.0f, pixel[0]), exponent[0]);
pixel[1] = powf(max(0.0f, pixel[1]), exponent[1]);
pixel[2] = powf(max(0.0f, pixel[2]), exponent[2]);
pixel[3] = powf(max(0.0f, pixel[3]), exponent[3]);
}
else if (type == TRANSFORM_MATRIX) {
float r = pixel[0];
float g = pixel[1];
float b = pixel[2];
float a = pixel[3];
pixel[0] = r*matrix[0] + g*matrix[1] + b*matrix[2] + a*matrix[3];
pixel[1] = r*matrix[4] + g*matrix[5] + b*matrix[6] + a*matrix[7];
pixel[2] = r*matrix[8] + g*matrix[9] + b*matrix[10] + a*matrix[11];
pixel[3] = r*matrix[12] + g*matrix[13] + b*matrix[14] + a*matrix[15];
pixel[0] += offset[0];
pixel[1] += offset[1];
pixel[2] += offset[2];
pixel[3] += offset[3];
}
}
void applyLinearRGB(float *pixel)
{
if (linear_transform != NULL) {
linear_transform->applyRGB(pixel);
}
}
void applyLinearRGBA(float *pixel)
{
if (linear_transform != NULL) {
linear_transform->applyRGBA(pixel);
}
}
void applyDisplayRGB(float *pixel)
{
if (display_transform != NULL) {
display_transform->applyRGB(pixel);
}
}
void applyDisplayRGBA(float *pixel)
{
if (display_transform != NULL) {
display_transform->applyRGBA(pixel);
}
}
TransformType type;
FallbackTransform *linear_transform;
FallbackTransform *display_transform;
/* Exponent transform. */
float exponent[4];
/* Matrix transform. */
float matrix[16];
float offset[4];
MEM_CXX_CLASS_ALLOC_FUNCS("FallbackProcessor");
};
struct FallbackProcessor {
FallbackProcessor()
: transform(NULL)
{
}
~FallbackProcessor() {
delete transform;
}
void applyRGB(float *pixel)
{
transform->applyRGB(pixel);
}
void applyRGBA(float *pixel)
{
transform->applyRGBA(pixel);
}
FallbackTransform *transform;
MEM_CXX_CLASS_ALLOC_FUNCS("FallbackProcessor");
};
OCIO_ConstConfigRcPtr *FallbackImpl::getCurrentConfig(void)
{
return CONFIG_DEFAULT;
}
void FallbackImpl::setCurrentConfig(const OCIO_ConstConfigRcPtr * /*config*/)
{
}
OCIO_ConstConfigRcPtr *FallbackImpl::configCreateFromEnv(void)
{
return NULL;
}
OCIO_ConstConfigRcPtr *FallbackImpl::configCreateFromFile(const char * /*filename*/)
{
return CONFIG_DEFAULT;
}
void FallbackImpl::configRelease(OCIO_ConstConfigRcPtr * /*config*/)
{
}
int FallbackImpl::configGetNumColorSpaces(OCIO_ConstConfigRcPtr * /*config*/)
{
return 2;
}
const char *FallbackImpl::configGetColorSpaceNameByIndex(OCIO_ConstConfigRcPtr * /*config*/,
int index)
{
if (index == 0)
return "Linear";
else if (index == 1)
return "sRGB";
return NULL;
}
OCIO_ConstColorSpaceRcPtr *FallbackImpl::configGetColorSpace(OCIO_ConstConfigRcPtr * /*config*/,
const char *name)
{
if (strcmp(name, "scene_linear") == 0)
return COLORSPACE_LINEAR;
else if (strcmp(name, "color_picking") == 0)
return COLORSPACE_SRGB;
else if (strcmp(name, "texture_paint") == 0)
return COLORSPACE_LINEAR;
else if (strcmp(name, "default_byte") == 0)
return COLORSPACE_SRGB;
else if (strcmp(name, "default_float") == 0)
return COLORSPACE_LINEAR;
else if (strcmp(name, "default_sequencer") == 0)
return COLORSPACE_SRGB;
else if (strcmp(name, "Linear") == 0)
return COLORSPACE_LINEAR;
else if (strcmp(name, "sRGB") == 0)
return COLORSPACE_SRGB;
return NULL;
}
int FallbackImpl::configGetIndexForColorSpace(OCIO_ConstConfigRcPtr *config,
const char *name)
{
OCIO_ConstColorSpaceRcPtr *cs = configGetColorSpace(config, name);
if (cs == COLORSPACE_LINEAR) {
return 0;
}
else if (cs == COLORSPACE_SRGB) {
return 1;
}
return -1;
}
const char *FallbackImpl::configGetDefaultDisplay(OCIO_ConstConfigRcPtr * /*config*/)
{
return "sRGB";
}
int FallbackImpl::configGetNumDisplays(OCIO_ConstConfigRcPtr * /*config*/)
{
return 1;
}
const char *FallbackImpl::configGetDisplay(OCIO_ConstConfigRcPtr * /*config*/,
int index)
{
if (index == 0) {
return "sRGB";
}
return NULL;
}
const char *FallbackImpl::configGetDefaultView(OCIO_ConstConfigRcPtr * /*config*/,
const char * /*display*/)
{
return "Default";
}
int FallbackImpl::configGetNumViews(OCIO_ConstConfigRcPtr * /*config*/,
const char * /*display*/)
{
return 1;
}
const char *FallbackImpl::configGetView(OCIO_ConstConfigRcPtr * /*config*/,
const char * /*display*/, int index)
{
if (index == 0) {
return "Default";
}
return NULL;
}
const char *FallbackImpl::configGetDisplayColorSpaceName(OCIO_ConstConfigRcPtr * /*config*/,
const char * /*display*/,
const char * /*view*/)
{
return "sRGB";
}
void FallbackImpl::configGetDefaultLumaCoefs(OCIO_ConstConfigRcPtr * /*config*/,
float *rgb)
{
/* Here we simply use the older Blender assumed primaries of
* ITU-BT.709 / sRGB, or 0.2126729 0.7151522 0.0721750. Brute
* force stupid, but only plausible option given no color management
* system in place.
*/
rgb[0] = 0.2126f;
rgb[1] = 0.7152f;
rgb[2] = 0.0722f;
}
int FallbackImpl::configGetNumLooks(OCIO_ConstConfigRcPtr * /*config*/)
{
return 0;
}
const char *FallbackImpl::configGetLookNameByIndex(OCIO_ConstConfigRcPtr * /*config*/,
int /*index*/)
{
return "";
}
OCIO_ConstLookRcPtr *FallbackImpl::configGetLook(OCIO_ConstConfigRcPtr * /*config*/,
const char * /*name*/)
{
return NULL;
}
const char *FallbackImpl::lookGetProcessSpace(OCIO_ConstLookRcPtr * /*look*/)
{
return NULL;
}
void FallbackImpl::lookRelease(OCIO_ConstLookRcPtr * /*look*/)
{
}
int FallbackImpl::colorSpaceIsInvertible(OCIO_ConstColorSpaceRcPtr * /*cs*/)
{
return 1;
}
int FallbackImpl::colorSpaceIsData(OCIO_ConstColorSpaceRcPtr * /*cs*/)
{
return 0;
}
void FallbackImpl::colorSpaceRelease(OCIO_ConstColorSpaceRcPtr * /*cs*/)
{
}
OCIO_ConstProcessorRcPtr *FallbackImpl::configGetProcessorWithNames(
OCIO_ConstConfigRcPtr *config,
const char *srcName,
const char *dstName)
{
OCIO_ConstColorSpaceRcPtr *cs_src = configGetColorSpace(config, srcName);
OCIO_ConstColorSpaceRcPtr *cs_dst = configGetColorSpace(config, dstName);
FallbackTransform *transform = new FallbackTransform();
if (cs_src == COLORSPACE_LINEAR && cs_dst == COLORSPACE_SRGB) {
transform->type = TRANSFORM_LINEAR_TO_SRGB;
}
else if (cs_src == COLORSPACE_SRGB && cs_dst == COLORSPACE_LINEAR) {
transform->type = TRANSFORM_SRGB_TO_LINEAR;
}
else {
transform->type = TRANSFORM_UNKNOWN;
}
FallbackProcessor *processor = new FallbackProcessor();
processor->transform = transform;
return (OCIO_ConstProcessorRcPtr *)processor;
}
OCIO_ConstProcessorRcPtr *FallbackImpl::configGetProcessor(OCIO_ConstConfigRcPtr * /*config*/,
OCIO_ConstTransformRcPtr *transform)
{
FallbackProcessor *processor = new FallbackProcessor();
processor->transform = (FallbackTransform *)transform;
return (OCIO_ConstProcessorRcPtr *)processor;
}
void FallbackImpl::processorApply(OCIO_ConstProcessorRcPtr *processor,
OCIO_PackedImageDesc *img)
{
/* OCIO_TODO stride not respected, channels must be 3 or 4 */
OCIO_PackedImageDescription *desc = (OCIO_PackedImageDescription*)img;
int channels = desc->numChannels;
float *pixels = desc->data;
int width = desc->width;
int height = desc->height;
int x, y;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
float *pixel = pixels + channels * (y * width + x);
if (channels == 4)
processorApplyRGBA(processor, pixel);
else if (channels == 3)
processorApplyRGB(processor, pixel);
}
}
}
void FallbackImpl::processorApply_predivide(OCIO_ConstProcessorRcPtr *processor,
OCIO_PackedImageDesc *img)
{
/* OCIO_TODO stride not respected, channels must be 3 or 4 */
OCIO_PackedImageDescription *desc = (OCIO_PackedImageDescription*)img;
int channels = desc->numChannels;
float *pixels = desc->data;
int width = desc->width;
int height = desc->height;
int x, y;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
float *pixel = pixels + channels * (y * width + x);
if (channels == 4)
processorApplyRGBA_predivide(processor, pixel);
else if (channels == 3)
processorApplyRGB(processor, pixel);
}
}
}
void FallbackImpl::processorApplyRGB(OCIO_ConstProcessorRcPtr *processor,
float *pixel)
{
((FallbackProcessor *)processor)->applyRGB(pixel);
}
void FallbackImpl::processorApplyRGBA(OCIO_ConstProcessorRcPtr *processor,
float *pixel)
{
((FallbackProcessor *)processor)->applyRGBA(pixel);
}
void FallbackImpl::processorApplyRGBA_predivide(OCIO_ConstProcessorRcPtr *processor,
float *pixel)
{
if (pixel[3] == 1.0f || pixel[3] == 0.0f) {
processorApplyRGBA(processor, pixel);
}
else {
float alpha, inv_alpha;
alpha = pixel[3];
inv_alpha = 1.0f / alpha;
pixel[0] *= inv_alpha;
pixel[1] *= inv_alpha;
pixel[2] *= inv_alpha;
processorApplyRGBA(processor, pixel);
pixel[0] *= alpha;
pixel[1] *= alpha;
pixel[2] *= alpha;
}
}
void FallbackImpl::processorRelease(OCIO_ConstProcessorRcPtr *processor)
{
delete (FallbackProcessor*)(processor);
}
const char *FallbackImpl::colorSpaceGetName(OCIO_ConstColorSpaceRcPtr *cs)
{
if (cs == COLORSPACE_LINEAR) {
return "Linear";
}
else if (cs == COLORSPACE_SRGB) {
return "sRGB";
}
return NULL;
}
const char *FallbackImpl::colorSpaceGetDescription(OCIO_ConstColorSpaceRcPtr * /*cs*/)
{
return "";
}
const char *FallbackImpl::colorSpaceGetFamily(OCIO_ConstColorSpaceRcPtr * /*cs*/)
{
return "";
}
OCIO_DisplayTransformRcPtr *FallbackImpl::createDisplayTransform(void)
{
FallbackTransform *transform = new FallbackTransform();
transform->type = TRANSFORM_LINEAR_TO_SRGB;
return (OCIO_DisplayTransformRcPtr*)transform;
}
void FallbackImpl::displayTransformSetInputColorSpaceName(OCIO_DisplayTransformRcPtr * /*dt*/,
const char * /*name*/)
{
}
void FallbackImpl::displayTransformSetDisplay(OCIO_DisplayTransformRcPtr * /*dt*/,
const char * /*name*/)
{
}
void FallbackImpl::displayTransformSetView(OCIO_DisplayTransformRcPtr * /*dt*/,
const char * /*name*/)
{
}
void FallbackImpl::displayTransformSetDisplayCC(OCIO_DisplayTransformRcPtr *dt,
OCIO_ConstTransformRcPtr *et)
{
FallbackTransform *transform = (FallbackTransform *)dt;
transform->display_transform = (FallbackTransform *)et;
}
void FallbackImpl::displayTransformSetLinearCC(OCIO_DisplayTransformRcPtr *dt,
OCIO_ConstTransformRcPtr *et)
{
FallbackTransform *transform = (FallbackTransform *)dt;
transform->linear_transform = (FallbackTransform *)et;
}
void FallbackImpl::displayTransformSetLooksOverride(OCIO_DisplayTransformRcPtr * /*dt*/,
const char * /*looks*/)
{
}
void FallbackImpl::displayTransformSetLooksOverrideEnabled(OCIO_DisplayTransformRcPtr * /*dt*/,
bool /*enabled*/)
{
}
void FallbackImpl::displayTransformRelease(OCIO_DisplayTransformRcPtr * /*dt*/)
{
}
OCIO_PackedImageDesc *FallbackImpl::createOCIO_PackedImageDesc(
float *data,
long width, long height, long numChannels,
long chanStrideBytes, long xStrideBytes, long yStrideBytes)
{
OCIO_PackedImageDescription *desc =
(OCIO_PackedImageDescription*)MEM_callocN(sizeof(OCIO_PackedImageDescription),
"OCIO_PackedImageDescription");
desc->data = data;
desc->width = width;
desc->height = height;
desc->numChannels = numChannels;
desc->chanStrideBytes = chanStrideBytes;
desc->xStrideBytes = xStrideBytes;
desc->yStrideBytes = yStrideBytes;
return (OCIO_PackedImageDesc*)desc;
}
void FallbackImpl::OCIO_PackedImageDescRelease(OCIO_PackedImageDesc* id)
{
MEM_freeN(id);
}
OCIO_ExponentTransformRcPtr *FallbackImpl::createExponentTransform(void)
{
FallbackTransform *transform = new FallbackTransform();
transform->type = TRANSFORM_EXPONENT;
return (OCIO_ExponentTransformRcPtr *)transform;
}
void FallbackImpl::exponentTransformSetValue(OCIO_ExponentTransformRcPtr *et,
const float *exponent)
{
FallbackTransform *transform = (FallbackTransform *)et;
copy_v4_v4(transform->exponent, exponent);
}
void FallbackImpl::exponentTransformRelease(OCIO_ExponentTransformRcPtr * /*et*/)
{
}
OCIO_MatrixTransformRcPtr *FallbackImpl::createMatrixTransform(void)
{
FallbackTransform *transform = new FallbackTransform();
transform->type = TRANSFORM_MATRIX;
return (OCIO_MatrixTransformRcPtr *)transform;
}
void FallbackImpl::matrixTransformSetValue(OCIO_MatrixTransformRcPtr *mt,
const float *m44,
const float *offset4)
{
FallbackTransform *transform = (FallbackTransform *)mt;
copy_m4_m4((float (*)[4])transform->matrix, (float (*)[4])m44);
copy_v4_v4(transform->offset, offset4);
}
void FallbackImpl::matrixTransformRelease(OCIO_MatrixTransformRcPtr * /*mt*/)
{
}
void FallbackImpl::matrixTransformScale(float *m44,
float *offset4,
const float *scale4)
{
if (scale4 == NULL) {
return;
}
if (m44 != NULL) {
memset(m44, 0, 16*sizeof(float));
m44[0] = scale4[0];
m44[5] = scale4[1];
m44[10] = scale4[2];
m44[15] = scale4[3];
}
if (offset4 != NULL) {
offset4[0] = 0.0f;
offset4[1] = 0.0f;
offset4[2] = 0.0f;
offset4[3] = 0.0f;
}
}
bool FallbackImpl::supportGLSLDraw(void)
{
return false;
}
bool FallbackImpl::setupGLSLDraw(struct OCIO_GLSLDrawState ** /*state_r*/,
OCIO_ConstProcessorRcPtr * /*processor*/,
OCIO_CurveMappingSettings * /*curve_mapping_settings*/,
float /*dither*/,
bool /*predivide*/)
{
return false;
}
void FallbackImpl::finishGLSLDraw(OCIO_GLSLDrawState * /*state*/)
{
}
void FallbackImpl::freeGLState(struct OCIO_GLSLDrawState * /*state_r*/)
{
}
const char *FallbackImpl::getVersionString(void)
{
return "fallback";
}
int FallbackImpl::getVersionHex(void)
{
return 0;
}