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Render.cpp
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Render.cpp
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// SPDX-License-Identifier: BSD-3-Clause
// Copyright (c) 2021-2022 Darby Johnston
// All rights reserved.
#include <tlrGL/Render.h>
#include <tlrGL/Mesh.h>
#include <tlrGL/OffscreenBuffer.h>
#include <tlrGL/Shader.h>
#include <tlrGL/Texture.h>
#include <tlrCore/Assert.h>
#include <tlrCore/Color.h>
#include <tlrCore/Context.h>
#include <tlrCore/Error.h>
#include <tlrCore/LRUCache.h>
#include <tlrCore/String.h>
#include <tlrCore/StringFormat.h>
#include <OpenColorIO/OpenColorIO.h>
#include <glm/gtc/matrix_transform.hpp>
#include <array>
#include <list>
#define _USE_MATH_DEFINES
#include <math.h>
namespace OCIO = OCIO_NAMESPACE;
namespace tlr
{
namespace gl
{
TLR_ENUM_IMPL(
YUVRange,
"FromFile",
"Full",
"Video");
TLR_ENUM_SERIALIZE_IMPL(YUVRange);
TLR_ENUM_IMPL(
ImageChannelsDisplay,
"Color",
"Red",
"Green",
"Blue",
"Alpha");
TLR_ENUM_SERIALIZE_IMPL(ImageChannelsDisplay);
TLR_ENUM_IMPL(
AlphaBlend,
"None",
"Straight",
"Premultiplied");
TLR_ENUM_SERIALIZE_IMPL(AlphaBlend);
namespace
{
struct VBOVertex
{
float vx;
float vy;
uint16_t tx;
uint16_t ty;
};
enum class DrawMode
{
Solid,
TextureAlpha,
Image
};
const std::string colorFunctionName = "OCIODisplay";
const std::string colorFunctionNoOp =
"vec4 OCIODisplay(vec4 inPixel)\n"
"{\n"
" return inPixel;\n"
"}\n";
const std::string vertexSource =
"#version 410\n"
"\n"
"// Inputs\n"
"in vec3 vPos;\n"
"in vec2 vTexture;\n"
"\n"
"// Outputs\n"
"out vec2 fTexture;\n"
"\n"
"// Uniforms\n"
"uniform struct Transform\n"
"{\n"
" mat4 mvp;\n"
"} transform;\n"
"\n"
"void main()\n"
"{\n"
" gl_Position = transform.mvp * vec4(vPos, 1.0);\n"
" fTexture = vTexture;\n"
"}\n";
const std::string fragmentSource =
"#version 410\n"
"\n"
"// Inputs\n"
"in vec2 fTexture;\n"
"\n"
"// Outputs\n"
"out vec4 fColor;\n"
"\n"
"// enum DrawMode\n"
"const uint DrawMode_Solid = 0;\n"
"const uint DrawMode_TextureAlpha = 1;\n"
"const uint DrawMode_Image = 2;\n"
"\n"
"// enum tlr::imaging::PixelType\n"
"const uint PixelType_None = 0;\n"
"const uint PixelType_L_U8 = 1;\n"
"const uint PixelType_L_U16 = 2;\n"
"const uint PixelType_L_U32 = 3;\n"
"const uint PixelType_L_F16 = 4;\n"
"const uint PixelType_L_F32 = 5;\n"
"const uint PixelType_LA_U8 = 6;\n"
"const uint PixelType_LA_U32 = 7;\n"
"const uint PixelType_LA_U16 = 8;\n"
"const uint PixelType_LA_F16 = 9;\n"
"const uint PixelType_LA_F32 = 10;\n"
"const uint PixelType_RGB_U8 = 11;\n"
"const uint PixelType_RGB_U10 = 12;\n"
"const uint PixelType_RGB_U16 = 13;\n"
"const uint PixelType_RGB_U32 = 14;\n"
"const uint PixelType_RGB_F16 = 15;\n"
"const uint PixelType_RGB_F32 = 16;\n"
"const uint PixelType_RGBA_U8 = 17;\n"
"const uint PixelType_RGBA_U16 = 18;\n"
"const uint PixelType_RGBA_U32 = 19;\n"
"const uint PixelType_RGBA_F16 = 20;\n"
"const uint PixelType_RGBA_F32 = 21;\n"
"const uint PixelType_YUV_420P = 22;\n"
"\n"
"// enum tlr::imaging::YUVRange\n"
"const uint YUVRange_Full = 0;\n"
"const uint YUVRange_Restricted = 1;\n"
"\n"
"// enum tlr::gl::ImageChannelsDisplay\n"
"const uint ImageChannelsDisplay_Color = 0;\n"
"const uint ImageChannelsDisplay_Red = 1;\n"
"const uint ImageChannelsDisplay_Green = 2;\n"
"const uint ImageChannelsDisplay_Blue = 3;\n"
"const uint ImageChannelsDisplay_Alpha = 4;\n"
"\n"
"struct Levels\n"
"{\n"
" float inLow;\n"
" float inHigh;\n"
" float gamma;\n"
" float outLow;\n"
" float outHigh;\n"
"};\n"
"\n"
"struct Exposure\n"
"{\n"
" float v;\n"
" float d;\n"
" float k;\n"
" float f;\n"
" float g;\n"
"};\n"
"\n"
"// Uniforms\n"
"uniform int drawMode;\n"
"uniform vec4 color;\n"
"\n"
"uniform int pixelType;\n"
"uniform int yuvRange;\n"
"uniform int imageChannels;\n"
"uniform sampler2D textureSampler0;\n"
"uniform sampler2D textureSampler1;\n"
"uniform sampler2D textureSampler2;\n"
"\n"
"uniform bool colorEnabled;\n"
"uniform vec3 colorAdd;\n"
"uniform mat4 colorMatrix;\n"
"uniform bool colorInvert;\n"
"uniform bool levelsEnabled;\n"
"uniform Levels levels;\n"
"uniform bool exposureEnabled;\n"
"uniform Exposure exposure;\n"
"uniform float softClip;\n"
"uniform int imageChannelsDisplay;\n"
"\n"
"vec4 colorFunc(vec4 value, vec3 add, mat4 m)\n"
"{\n"
" vec4 tmp;\n"
" tmp[0] = value[0] + add[0];\n"
" tmp[1] = value[1] + add[1];\n"
" tmp[2] = value[2] + add[2];\n"
" tmp[3] = 1.0;\n"
" tmp *= m;\n"
" tmp[3] = value[3];\n"
" return tmp;\n"
"}\n"
"\n"
"vec4 levelsFunc(vec4 value, Levels data)\n"
"{\n"
" vec4 tmp;\n"
" tmp[0] = (value[0] - data.inLow) / data.inHigh;\n"
" tmp[1] = (value[1] - data.inLow) / data.inHigh;\n"
" tmp[2] = (value[2] - data.inLow) / data.inHigh;\n"
" if (tmp[0] >= 0.0)\n"
" tmp[0] = pow(tmp[0], data.gamma);\n"
" if (tmp[1] >= 0.0)\n"
" tmp[1] = pow(tmp[1], data.gamma);\n"
" if (tmp[2] >= 0.0)\n"
" tmp[2] = pow(tmp[2], data.gamma);\n"
" value[0] = tmp[0] * data.outHigh + data.outLow;\n"
" value[1] = tmp[1] * data.outHigh + data.outLow;\n"
" value[2] = tmp[2] * data.outHigh + data.outLow;\n"
" return value;\n"
"}\n"
"\n"
"vec4 softClipFunc(vec4 value, float softClip)\n"
"{\n"
" float tmp = 1.0 - softClip;\n"
" if (value[0] > tmp)\n"
" value[0] = tmp + (1.0 - exp(-(value[0] - tmp) / softClip)) * softClip;\n"
" if (value[1] > tmp)\n"
" value[1] = tmp + (1.0 - exp(-(value[1] - tmp) / softClip)) * softClip;\n"
" if (value[2] > tmp)\n"
" value[2] = tmp + (1.0 - exp(-(value[2] - tmp) / softClip)) * softClip;\n"
" return value;\n"
"}\n"
"\n"
"float knee(float value, float f)\n"
"{\n"
" return log(value * f + 1.0) / f;\n"
"}\n"
"\n"
"vec4 exposureFunc(vec4 value, Exposure data)\n"
"{\n"
" value[0] = max(0.0, value[0] - data.d) * data.v;\n"
" value[1] = max(0.0, value[1] - data.d) * data.v;\n"
" value[2] = max(0.0, value[2] - data.d) * data.v;\n"
" if (value[0] > data.k)\n"
" value[0] = data.k + knee(value[0] - data.k, data.f);\n"
" if (value[1] > data.k)\n"
" value[1] = data.k + knee(value[1] - data.k, data.f);\n"
" if (value[2] > data.k)\n"
" value[2] = data.k + knee(value[2] - data.k, data.f);\n"
" value[0] *= 0.332;\n"
" value[1] *= 0.332;\n"
" value[2] *= 0.332;\n"
" return value;\n"
"}\n"
"\n"
"// $color"
"\n"
"vec4 sampleTexture(sampler2D s0, sampler2D s1, sampler2D s2)\n"
"{\n"
" vec4 c;\n"
" if (PixelType_YUV_420P == pixelType)\n"
" {\n"
" if (YUVRange_Full == yuvRange)\n"
" {\n"
" float y = texture(s0, fTexture).r;\n"
" float cb = texture(s1, fTexture).r - 128.0 / 255.0;\n"
" float cr = texture(s2, fTexture).r - 128.0 / 255.0;\n"
" c.r = y + ( 0.0 * cb) + ( 1.4 * cr);\n"
" c.g = y + (-0.343 * cb) + (-0.711 * cr);\n"
" c.b = y + ( 1.765 * cb) + ( 0.0 * cr);\n"
" }\n"
" else if (YUVRange_Restricted == yuvRange)\n"
" {\n"
" float y = texture(s0, fTexture).r - 16.0 / 255.0;\n"
" float cb = texture(s1, fTexture).r - 128.0 / 255.0;\n"
" float cr = texture(s2, fTexture).r - 128.0 / 255.0;\n"
" c.r = (1.164 * y) + ( 0.0 * cb) + ( 1.793 * cr);\n"
" c.g = (1.164 * y) + (-0.213 * cb) + (-0.533 * cr);\n"
" c.b = (1.164 * y) + ( 2.112 * cb) + ( 0.0 * cr);\n"
" }\n"
" c.a = 1.0;\n"
" }\n"
" else\n"
" {\n"
" c = texture(s0, fTexture);\n"
" }\n"
" return c;\n"
"}\n"
"\n"
"void main()\n"
"{\n"
" if (DrawMode_Solid == drawMode)\n"
" {\n"
" fColor = color;\n"
" }\n"
" else if (DrawMode_TextureAlpha == drawMode)\n"
" {\n"
" vec4 c = sampleTexture(textureSampler0, textureSampler1, textureSampler2);\n"
" fColor.r = color.r;\n"
" fColor.g = color.g;\n"
" fColor.b = color.b;\n"
" fColor.a = c.r;\n"
" }\n"
" else if (DrawMode_Image == drawMode)\n"
" {\n"
" vec4 c = sampleTexture(textureSampler0, textureSampler1, textureSampler2);\n"
"\n"
" // Swizzle for the image channels.\n"
" if (1 == imageChannels)\n"
" {\n"
" c.g = c.b = c.r;\n"
" c.a = 1.0;\n"
" }\n"
" else if (2 == imageChannels)\n"
" {\n"
" c.a = c.g;\n"
" c.g = c.b = c.r;\n"
" }\n"
" else if (3 == imageChannels)\n"
" {\n"
" c.a = 1.0;\n"
" }\n"
"\n"
" // Apply color transformations.\n"
" if (colorEnabled)\n"
" {\n"
" c = colorFunc(c, colorAdd, colorMatrix);\n"
" }\n"
" if (colorInvert)\n"
" {\n"
" c.r = 1.0 - c.r;\n"
" c.g = 1.0 - c.g;\n"
" c.b = 1.0 - c.b;\n"
" }\n"
" if (levelsEnabled)\n"
" {\n"
" c = levelsFunc(c, levels);\n"
" }\n"
" if (exposureEnabled)\n"
" {\n"
" c = exposureFunc(c, exposure);\n"
" }\n"
" if (softClip > 0.0)\n"
" {\n"
" c = softClipFunc(c, softClip);\n"
" }\n"
"\n"
" // Apply color management.\n"
" c = OCIODisplay(c);\n"
"\n"
" // Swizzle for the image channels display.\n"
" if (ImageChannelsDisplay_Red == imageChannelsDisplay)\n"
" {\n"
" c.g = c.r;\n"
" c.b = c.r;\n"
" }\n"
" else if (ImageChannelsDisplay_Green == imageChannelsDisplay)\n"
" {\n"
" c.r = c.g;\n"
" c.b = c.g;\n"
" }\n"
" else if (ImageChannelsDisplay_Blue == imageChannelsDisplay)\n"
" {\n"
" c.r = c.b;\n"
" c.g = c.b;\n"
" }\n"
" else if (ImageChannelsDisplay_Alpha == imageChannelsDisplay)\n"
" {\n"
" c.r = c.a;\n"
" c.g = c.a;\n"
" c.b = c.a;\n"
" }\n"
"\n"
" fColor = c * color;\n"
" }\n"
"}\n";
void setTextureParameters(GLenum textureType, OCIO::Interpolation interpolation)
{
if (OCIO::INTERP_NEAREST == interpolation)
{
glTexParameteri(textureType, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(textureType, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
}
else
{
glTexParameteri(textureType, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(textureType, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
}
glTexParameteri(textureType, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(textureType, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(textureType, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
}
std::vector<std::shared_ptr<Texture> > getTextures(const imaging::Info& info, size_t offset = 0)
{
std::vector<std::shared_ptr<Texture> > out;
switch (info.pixelType)
{
case imaging::PixelType::YUV_420P:
{
glActiveTexture(static_cast<GLenum>(GL_TEXTURE0 + offset));
auto infoTmp = imaging::Info(info.size, imaging::PixelType::L_U8);
out.push_back(Texture::create(infoTmp));
glActiveTexture(static_cast<GLenum>(GL_TEXTURE0 + 1 + offset));
const std::size_t w = info.size.w;
const std::size_t h = info.size.h;
const std::size_t w2 = w / 2;
const std::size_t h2 = h / 2;
infoTmp = imaging::Info(imaging::Size(w2, h2), imaging::PixelType::L_U8);
out.push_back(Texture::create(infoTmp));
glActiveTexture(static_cast<GLenum>(GL_TEXTURE0 + 2 + offset));
out.push_back(Texture::create(infoTmp));
break;
}
default:
{
glActiveTexture(static_cast<GLenum>(GL_TEXTURE0 + offset));
auto texture = Texture::create(info);
out.push_back(texture);
break;
}
}
return out;
}
void copyTextures(
const std::shared_ptr<imaging::Image>& image,
const std::vector<std::shared_ptr<Texture> >& textures,
size_t offset = 0)
{
std::vector<std::shared_ptr<Texture> > out;
const auto& info = image->getInfo();
switch (info.pixelType)
{
case imaging::PixelType::YUV_420P:
{
glActiveTexture(static_cast<GLenum>(GL_TEXTURE0 + offset));
textures[0]->copy(image->getData(), textures[0]->getInfo());
glActiveTexture(static_cast<GLenum>(GL_TEXTURE0 + 1 + offset));
const std::size_t w = info.size.w;
const std::size_t h = info.size.h;
const std::size_t w2 = w / 2;
const std::size_t h2 = h / 2;
textures[1]->copy(image->getData() + (w * h), textures[1]->getInfo());
glActiveTexture(static_cast<GLenum>(GL_TEXTURE0 + 2 + offset));
textures[2]->copy(image->getData() + (w * h) + (w2 * h2), textures[2]->getInfo());
break;
}
default:
{
glActiveTexture(static_cast<GLenum>(GL_TEXTURE0 + offset));
textures[0]->copy(*image);
break;
}
}
}
class TextureCache
{
public:
void setSize(size_t value)
{
if (value == _size)
return;
_size = value;
_cacheUpdate();
}
std::vector<std::shared_ptr<Texture> > get(const imaging::Info& info)
{
std::vector<std::shared_ptr<Texture> > out;
const auto i = std::find_if(_cache.begin(), _cache.end(),
[info](const std::pair<imaging::Info, std::vector<std::shared_ptr<Texture> > >& value)
{
return info == value.first;
});
if (i != _cache.end())
{
out = i->second;
}
else
{
out = getTextures(info);
_cache.push_front(std::make_pair(info, out));
_cacheUpdate();
}
return out;
}
private:
void _cacheUpdate()
{
while (_cache.size() > _size)
{
_cache.pop_back();
}
}
size_t _size = 4;
std::list<std::pair<imaging::Info, std::vector<std::shared_ptr<Texture> > > > _cache;
};
}
struct Render::Private
{
std::weak_ptr<core::Context> context;
ColorConfig colorConfig;
OCIO::ConstConfigRcPtr ocioConfig;
OCIO::DisplayViewTransformRcPtr ocioTransform;
OCIO::LegacyViewingPipelineRcPtr ocioVP;
OCIO::ConstProcessorRcPtr ocioProcessor;
OCIO::ConstGPUProcessorRcPtr ocioGpuProcessor;
OCIO::GpuShaderDescRcPtr ocioShaderDesc;
struct TextureId
{
TextureId(
unsigned id,
std::string name,
std::string sampler,
unsigned type);
unsigned id = -1;
std::string name;
std::string sampler;
unsigned type = -1;
};
std::vector<TextureId> colorTextures;
imaging::Size size;
std::shared_ptr<Shader> shader;
std::shared_ptr<OffscreenBuffer> offscreenBuffer;
TextureCache textureCache;
memory::LRUCache<GlyphInfo, std::shared_ptr<Texture> > glyphTextureCache;
};
Render::Private::TextureId::TextureId(
unsigned id,
std::string name,
std::string sampler,
unsigned type) :
id(id),
name(name),
sampler(sampler),
type(type)
{}
void Render::_init(const std::shared_ptr<core::Context>& context)
{
TLR_PRIVATE_P();
p.context = context;
}
Render::Render() :
_p(new Private)
{}
Render::~Render()
{
_delColorConfig();
}
std::shared_ptr<Render> Render::create(const std::shared_ptr<core::Context>& context)
{
auto out = std::shared_ptr<Render>(new Render);
out->_init(context);
return out;
}
void Render::setTextureCacheSize(size_t value)
{
_p->textureCache.setSize(value);
}
void Render::setColorConfig(const ColorConfig& config)
{
TLR_PRIVATE_P();
if (config == p.colorConfig)
return;
_delColorConfig();
p.colorConfig = config;
if (!p.colorConfig.config.empty())
{
p.ocioConfig = OCIO::Config::CreateFromFile(p.colorConfig.config.c_str());
}
else
{
p.ocioConfig = OCIO::GetCurrentConfig();
}
if (!p.ocioConfig)
{
throw std::runtime_error("Cannot get OCIO configuration");
}
const std::string display = !p.colorConfig.display.empty() ?
p.colorConfig.display :
p.ocioConfig->getDefaultDisplay();
const std::string view = !p.colorConfig.view.empty() ?
p.colorConfig.view :
p.ocioConfig->getDefaultView(display.c_str());
p.ocioTransform = OCIO::DisplayViewTransform::Create();
if (!p.ocioTransform)
{
_delColorConfig();
throw std::runtime_error("Cannot create OCIO transform");
}
p.ocioTransform->setSrc(p.colorConfig.input.c_str());
p.ocioTransform->setDisplay(display.c_str());
p.ocioTransform->setView(view.c_str());
p.ocioVP = OCIO::LegacyViewingPipeline::Create();
if (!p.ocioVP)
{
_delColorConfig();
throw std::runtime_error("Cannot create OCIO viewing pipeline");
}
p.ocioVP->setDisplayViewTransform(p.ocioTransform);
p.ocioVP->setLooksOverrideEnabled(true);
p.ocioVP->setLooksOverride(p.colorConfig.look.c_str());
p.ocioProcessor = p.ocioVP->getProcessor(p.ocioConfig, p.ocioConfig->getCurrentContext());
if (!p.ocioProcessor)
{
_delColorConfig();
throw std::runtime_error("Cannot get OCIO processor");
}
p.ocioGpuProcessor = p.ocioProcessor->getDefaultGPUProcessor();
if (!p.ocioGpuProcessor)
{
_delColorConfig();
throw std::runtime_error("Cannot get OCIO GPU processor");
}
p.ocioShaderDesc = OCIO::GpuShaderDesc::CreateShaderDesc();
if (!p.ocioShaderDesc)
{
_delColorConfig();
throw std::runtime_error("Cannot create OCIO shader description");
}
p.ocioShaderDesc->setLanguage(OCIO::GPU_LANGUAGE_GLSL_4_0);
p.ocioShaderDesc->setFunctionName(colorFunctionName.c_str());
p.ocioGpuProcessor->extractGpuShaderInfo(p.ocioShaderDesc);
// Create 3D textures.
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glPixelStorei(GL_UNPACK_SWAP_BYTES, 0);
const unsigned num3DTextures = p.ocioShaderDesc->getNum3DTextures();
unsigned currentTexture = 0;
for (unsigned i = 0; i < num3DTextures; ++i, ++currentTexture)
{
const char* textureName = nullptr;
const char* samplerName = nullptr;
unsigned edgelen = 0;
OCIO::Interpolation interpolation = OCIO::INTERP_LINEAR;
p.ocioShaderDesc->get3DTexture(i, textureName, samplerName, edgelen, interpolation);
if (!textureName ||
!*textureName ||
!samplerName ||
!*samplerName ||
0 == edgelen)
{
_delColorConfig();
throw std::runtime_error("The OCIO texture data is corrupted");
}
const float* values = nullptr;
p.ocioShaderDesc->get3DTextureValues(i, values);
if (!values)
{
_delColorConfig();
throw std::runtime_error("The OCIO texture values are missing");
}
unsigned textureId = 0;
glGenTextures(1, &textureId);
glActiveTexture(GL_TEXTURE3 + currentTexture);
glBindTexture(GL_TEXTURE_3D, textureId);
setTextureParameters(GL_TEXTURE_3D, interpolation);
glTexImage3D(GL_TEXTURE_3D, 0, GL_RGB32F, edgelen, edgelen, edgelen, 0, GL_RGB, GL_FLOAT, values);
p.colorTextures.push_back(Private::TextureId(textureId, textureName, samplerName, GL_TEXTURE_3D));
}
// Create 1D textures.
const unsigned numTextures = p.ocioShaderDesc->getNumTextures();
for (unsigned i = 0; i < numTextures; ++i, ++currentTexture)
{
const char* textureName = nullptr;
const char* samplerName = nullptr;
unsigned width = 0;
unsigned height = 0;
OCIO::GpuShaderDesc::TextureType channel = OCIO::GpuShaderDesc::TEXTURE_RGB_CHANNEL;
OCIO::Interpolation interpolation = OCIO::INTERP_LINEAR;
p.ocioShaderDesc->getTexture(i, textureName, samplerName, width, height, channel, interpolation);
if (!textureName ||
!*textureName ||
!samplerName ||
!*samplerName ||
width == 0)
{
_delColorConfig();
throw std::runtime_error("The OCIO texture data is corrupted");
}
const float* values = nullptr;
p.ocioShaderDesc->getTextureValues(i, values);
if (!values)
{
_delColorConfig();
throw std::runtime_error("The OCIO texture values are missing");
}
unsigned textureId = 0;
GLint internalformat = GL_RGB32F;
GLenum format = GL_RGB;
if (OCIO::GpuShaderCreator::TEXTURE_RED_CHANNEL == channel)
{
internalformat = GL_R32F;
format = GL_RED;
}
glGenTextures(1, &textureId);
glActiveTexture(GL_TEXTURE3 + currentTexture);
if (height > 1)
{
glBindTexture(GL_TEXTURE_2D, textureId);
setTextureParameters(GL_TEXTURE_2D, interpolation);
glTexImage2D(GL_TEXTURE_2D, 0, internalformat, width, height, 0, format, GL_FLOAT, values);
}
else
{
glBindTexture(GL_TEXTURE_1D, textureId);
setTextureParameters(GL_TEXTURE_1D, interpolation);
glTexImage1D(GL_TEXTURE_1D, 0, internalformat, width, 0, format, GL_FLOAT, values);
}
p.colorTextures.push_back(Private::TextureId(textureId, textureName, samplerName, (height > 1) ? GL_TEXTURE_2D : GL_TEXTURE_1D));
}
p.shader.reset();
}
void Render::begin(const imaging::Size& size)
{
TLR_PRIVATE_P();
p.size = size;
glViewport(0, 0, p.size.w, p.size.h);
glClearColor(0.F, 0.F, 0.F, 1.F);
glClear(GL_COLOR_BUFFER_BIT);
glEnable(GL_BLEND);
glBlendEquationSeparate(GL_FUNC_ADD, GL_FUNC_ADD);
glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
if (!p.shader)
{
std::string source = fragmentSource;
const std::string token = "// $color";
const auto i = source.find(token);
if (i != std::string::npos)
{
source.replace(i, token.size(), p.ocioShaderDesc ? p.ocioShaderDesc->getShaderText() : colorFunctionNoOp);
}
if (auto context = p.context.lock())
{
//context->log("tlr::gl::Render", source);
context->log("tlr::gl::Render", "Creating fragment shader");
}
p.shader = Shader::create(vertexSource, source);
}
p.shader->bind();
const auto viewMatrix = glm::ortho(
0.F,
static_cast<float>(p.size.w),
static_cast<float>(p.size.h),
0.F,
-1.F,
1.F);
p.shader->setUniform("transform.mvp", viewMatrix);
for (size_t i = 0; i < p.colorTextures.size(); ++i)
{
glActiveTexture(GL_TEXTURE3 + i);
glBindTexture(p.colorTextures[i].type, p.colorTextures[i].id);
p.shader->setUniform(p.colorTextures[i].sampler, static_cast<int>(3 + i));
}
}
void Render::end()
{}
void Render::drawRect(
const math::BBox2f& bbox,
const imaging::Color4f& color)
{
TLR_PRIVATE_P();
p.shader->setUniform("drawMode", static_cast<int>(DrawMode::Solid));
p.shader->setUniform("color", color);
std::vector<uint8_t> vboData;
vboData.resize(4 * getByteCount(VBOType::Pos2_F32_UV_U16));
VBOVertex* vboP = reinterpret_cast<VBOVertex*>(vboData.data());
vboP[0].vx = bbox.min.x;
vboP[0].vy = bbox.min.y;
vboP[0].tx = 0;
vboP[0].ty = 0;
vboP[1].vx = bbox.max.x;
vboP[1].vy = bbox.min.y;
vboP[1].tx = 0;
vboP[1].ty = 0;
vboP[2].vx = bbox.min.x;
vboP[2].vy = bbox.max.y;
vboP[2].tx = 0;
vboP[2].ty = 0;
vboP[3].vx = bbox.max.x;
vboP[3].vy = bbox.max.y;
vboP[3].tx = 0;
vboP[3].ty = 0;
auto vbo = VBO::create(4, VBOType::Pos2_F32_UV_U16);
vbo->copy(vboData);
auto vao = VAO::create(vbo->getType(), vbo->getID());
vao->bind();
vao->draw(GL_TRIANGLE_STRIP, 0, 4);
}
namespace
{
void swap(uint16_t& a, uint16_t& b)
{
uint16_t tmp = a;
a = b;
b = tmp;
}
float knee(float x, float f)
{
return logf(x * f + 1.F) / f;
}
float knee2(float x, float y)
{
float f0 = 0.F;
float f1 = 1.F;
while (knee(x, f1) > y)
{
f0 = f1;
f1 = f1 * 2.F;
}
for (size_t i = 0; i < 30; ++i)
{
const float f2 = (f0 + f1) / 2.F;
if (knee(x, f2) < y)
{
f1 = f2;
}
else
{
f0 = f2;
}
}
return (f0 + f1) / 2.F;
}
glm::mat4x4 brightnessMatrix(const glm::vec3& value)
{
return glm::mat4x4(
value.x, 0.F, 0.F, 0.F,
0.F, value.y, 0.F, 0.F,
0.F, 0.F, value.z, 0.F,
0.F, 0.F, 0.F, 1.F);
}
glm::mat4x4 contrastMatrix(const glm::vec3& value)
{
return
glm::mat4x4(
1.F, 0.F, 0.F, -.5F,
0.F, 1.F, 0.F, -.5F,
0.F, 0.F, 1.F, -.5F,
0.F, 0.F, 0.F, 1.F) *
glm::mat4x4(
value.x, 0.F, 0.F, 0.F,
0.F, value.y, 0.F, 0.F,
0.F, 0.F, value.z, 0.F,
0.F, 0.F, 0.F, 1.F) *
glm::mat4x4(
1.F, 0.F, 0.F, .5F,
0.F, 1.F, 0.F, .5F,
0.F, 0.F, 1.F, .5F,
0.F, 0.F, 0.F, 1.F);
}
glm::mat4x4 saturationMatrix(const glm::vec3& value)
{
const glm::vec3 s(
(1.F - value.x) * .3086F,
(1.F - value.y) * .6094F,
(1.F - value.z) * .0820F);
return glm::mat4x4(
s.x + value.x, s.y, s.z, 0.F,
s.x, s.y + value.y, s.z, 0.F,
s.x, s.y, s.z + value.z, 0.F,
0.F, 0.F, 0.F, 1.F);
}
glm::mat4x4 tintMatrix(float v)
{
const float c = cos(v * M_PI * 2.F);
const float c2 = 1.F - c;
const float c3 = 1.F / 3.F * c2;
const float s = sin(v * M_PI * 2.F);
const float sq = sqrtf(1.F / 3.F);
return glm::mat4x4(
c + c2 / 3.F, c3 - sq * s, c3 + sq * s, 0.F,
c3 + sq * s, c + c3, c3 - sq * s, 0.F,
c3 - sq * s, c3 + sq * s, c + c3, 0.F,
0.F, 0.F, 0.F, 1.F);
}
glm::mat4x4 colorMatrix(const ImageColor& in)
{
return
brightnessMatrix(in.brightness) *
contrastMatrix(in.contrast) *
saturationMatrix(in.saturation) *
tintMatrix(in.tint);
}
}
void Render::drawImage(
const std::shared_ptr<imaging::Image>& image,
const math::BBox2f& bbox,
const imaging::Color4f& color,
const ImageOptions& imageOptions)
{
TLR_PRIVATE_P();
const auto& info = image->getInfo();
p.shader->setUniform("drawMode", static_cast<int>(DrawMode::Image));
p.shader->setUniform("color", color);
p.shader->setUniform("pixelType", static_cast<int>(info.pixelType));
imaging::YUVRange yuvRange = info.yuvRange;
switch (imageOptions.yuvRange)
{
case YUVRange::Full: yuvRange = imaging::YUVRange::Full; break;
case YUVRange::Video: yuvRange = imaging::YUVRange::Video; break;
default: break;
}
p.shader->setUniform("yuvRange", static_cast<int>(yuvRange));
p.shader->setUniform("imageChannels", imaging::getChannelCount(info.pixelType));
p.shader->setUniform("textureSampler0", 0);
p.shader->setUniform("textureSampler1", 1);
p.shader->setUniform("textureSampler2", 2);
const bool colorMatrixEnabled = imageOptions.colorEnabled && imageOptions.color != ImageColor();
p.shader->setUniform("colorEnabled", colorMatrixEnabled);
p.shader->setUniform("colorAdd", imageOptions.color.add);
if (colorMatrixEnabled)
{
p.shader->setUniform("colorMatrix", colorMatrix(imageOptions.color));
}
p.shader->setUniform("colorInvert", imageOptions.color.invert);
p.shader->setUniform("levelsEnabled", imageOptions.levelsEnabled);
p.shader->setUniform("levels.inLow", imageOptions.levels.inLow);
p.shader->setUniform("levels.inHigh", imageOptions.levels.inHigh);
p.shader->setUniform("levels.gamma", imageOptions.levels.gamma > 0.F ? (1.F / imageOptions.levels.gamma) : 1000000.F);
p.shader->setUniform("levels.outLow", imageOptions.levels.outLow);
p.shader->setUniform("levels.outHigh", imageOptions.levels.outHigh);
p.shader->setUniform("exposureEnabled", imageOptions.exposureEnabled);
if (imageOptions.exposureEnabled)
{
const float v = powf(2.F, imageOptions.exposure.exposure + 2.47393F);
const float d = imageOptions.exposure.defog;
const float k = powf(2.F, imageOptions.exposure.kneeLow);
const float f = knee2(
powf(2.F, imageOptions.exposure.kneeHigh) - k,
powf(2.F, 3.5F) - k);
p.shader->setUniform("exposure.v", v);
p.shader->setUniform("exposure.d", d);
p.shader->setUniform("exposure.k", k);
p.shader->setUniform("exposure.f", f);
}
p.shader->setUniform("softClip", imageOptions.softClipEnabled ? imageOptions.softClip : 0.F);