mirror of
https://github.com/g-truc/glm.git
synced 2024-11-14 14:04:36 +00:00
75 lines
2.1 KiB
Plaintext
75 lines
2.1 KiB
Plaintext
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
||
|
|
// OpenGL Image Copyright (c) 2008 - 2011 G-Truc Creation (www.g-truc.net)
|
||
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
||
|
|
// Created : 2008-12-19
|
||
|
|
// Updated : 2010-01-09
|
||
|
|
// Licence : This source is under MIT License
|
||
|
|
// File : gli/gtx/gradient.inl
|
||
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
||
|
|
|
||
|
|
namespace gli{
|
||
|
|
namespace gtx{
|
||
|
|
namespace gradient
|
||
|
|
{
|
||
|
|
inline texture2D radial
|
||
|
|
(
|
||
|
|
texture2D::dimensions_type const & Size,
|
||
|
|
texture2D::texcoord_type const & Center,
|
||
|
|
float const & Radius,
|
||
|
|
texture2D::texcoord_type const & Focal
|
||
|
|
)
|
||
|
|
{
|
||
|
|
image2D Result(texture2D::dimensions_type(Size), gli::RGB8U);
|
||
|
|
glm::u8vec3 * DstData = (glm::u8vec3 *)Result.data();
|
||
|
|
|
||
|
|
for(std::size_t y = 0; y < Result.dimensions().y; ++y)
|
||
|
|
for(std::size_t x = 0; x < Result.dimensions().x; ++x)
|
||
|
|
{
|
||
|
|
float Value = glm::radialGradient(
|
||
|
|
Center * glm::vec2(Size),
|
||
|
|
Radius,
|
||
|
|
Focal * glm::vec2(Size),
|
||
|
|
glm::vec2(x, y));
|
||
|
|
|
||
|
|
std::size_t Index = x + y * Result.dimensions().x;
|
||
|
|
|
||
|
|
*(DstData + Index) = glm::u8vec3(glm::u8(glm::clamp(Value * 255.f, 0.f, 255.f)));
|
||
|
|
}
|
||
|
|
|
||
|
|
gli::texture2D Image(1);
|
||
|
|
Image[0] = Result;
|
||
|
|
return Image;
|
||
|
|
}
|
||
|
|
|
||
|
|
inline texture2D linear
|
||
|
|
(
|
||
|
|
texture2D::dimensions_type const & Size,
|
||
|
|
texture2D::texcoord_type const & Point0,
|
||
|
|
texture2D::texcoord_type const & Point1
|
||
|
|
)
|
||
|
|
{
|
||
|
|
image2D Result(texture2D::dimensions_type(Size), gli::RGB8U);
|
||
|
|
glm::u8vec3 * DstData = (glm::u8vec3 *)Result.data();
|
||
|
|
|
||
|
|
for(std::size_t y = 0; y < Result.dimensions().y; ++y)
|
||
|
|
for(std::size_t x = 0; x < Result.dimensions().x; ++x)
|
||
|
|
{
|
||
|
|
float Value = glm::linearGradient(
|
||
|
|
Point0 * glm::vec2(Size),
|
||
|
|
Point1 * glm::vec2(Size),
|
||
|
|
texture2D::texcoord_type(x, y));
|
||
|
|
|
||
|
|
std::size_t Index = x + y * Result.dimensions().x;
|
||
|
|
|
||
|
|
*(DstData + Index) = glm::u8vec3(glm::u8(glm::clamp(Value * 255.f, 0.f, 255.f)));
|
||
|
|
}
|
||
|
|
|
||
|
|
gli::texture2D Image(1);
|
||
|
|
Image[0] = Result;
|
||
|
|
return Image;
|
||
|
|
}
|
||
|
|
|
||
|
|
}//namespace gradient
|
||
|
|
}//namespace gtx
|
||
|
|
}//namespace gli
|