准备shaders文件-ccShad_Hsl.h
" n
#ifdef GL_ES n
precision mediump float; n
#endif n
n
varying vec2 v_texCoord; n
uniform sampler2D CC_Texture0; n
n
uniform float AddHue; n
uniform float AddSat; n
uniform float AddLig; n
uniform float AddRed; n
uniform float AddGreen; n
uniform float AddBlue; n
uniform float AddAlpha; n
n
float Hue_2_RGB(float v1,float v2,float vH ) n
{ n
float ret;n
if ( vH < 0.0 )n
vH += 1.0;n
if ( vH > 1.0 )n
vH -= 1.0;n
if ( ( 6.0 * vH ) < 1.0 )n
ret = ( v1 + ( v2 - v1 ) * 6.0 * vH );n
else if ( ( 2.0 * vH ) < 1.0 )n
ret = ( v2 );n
else if ( ( 3.0 * vH ) < 2.0 )n
ret = ( v1 + ( v2 - v1 ) * ( ( 2.0 / 3.0 ) - vH ) * 6.0 );n
elsen
ret = v1;n
return ret;n
}n
n
void main(void)n
{n
float Cmax,Cmin;n
n
float D;n
n
float H,S,L;n
float R,G,B;n
n
vec4 color = texture2D(CC_Texture0,v_texCoord);n
n
R = color.r;n
G = color.g;n
B = color.b;n
Cmax = max (R,max (G,B));n
Cmin = min (R,min (G,B));n
L = (Cmax + Cmin) / 2.0;n
n
if (Cmax == Cmin)n
{n
H = 0.0;n
S = 0.0;n
}n
elsen
{n
D = Cmax - Cmin;n
if (L < 0.5)n
{n
S = D / (Cmax + Cmin);n
}n
elsen
{n
S = D / (2.0 - (Cmax + Cmin));n
}n
n
if (R == Cmax)n
{n
H = (G - B) / D;n
} else {n
if (G == Cmax)n
{n
H = 2.0 + (B - R) /D;n
}n
elsen
{n
H = 4.0 + (R - G) / D;n
}n
}n
H = H / 6.0;n
}n
n
// modify H/S/L valuesn
H += AddHue;n
S += AddSat;n
L += AddLig;n
n
if (H < 0.0)n
{n
H = H + 1.0;n
}n
n
H = clamp(H,0.0,1.0);n
S = clamp(S,1.0);n
L = clamp(L,1.0);n
n
// convert back to RGBn
float var_2,var_1;n
n
if (S == 0.0)n
{n
R = L;n
G = L;n
B = L;n
}n
elsen
{n
if ( L < 0.5 )n
{n
var_2 = L * ( 1.0 + S );n
}n
elsen
{n
var_2 = ( L + S ) - ( S * L );n
}n
n
var_1 = 2.0 * L - var_2;n
n
R = Hue_2_RGB( var_1,var_2,H + ( 1.0 / 3.0 ) );n
G = Hue_2_RGB( var_1,H );n
B = Hue_2_RGB( var_1,H - ( 1.0 / 3.0 ) );n
}n
n
R = R * AddRed;n
G = G * AddGreen;n
B = B * AddBlue;n
n
gl_FragColor = vec4(R,B,color.a * AddAlpha);n
n
}n
";
将它放入E:HSluZiLongcocos2d-x-2.2.1cocos2d-x-2.2.1cocos2dxshaders 目录下
步骤2.
在ccShaders.h 中加入代码
extern CC_DLL const GLchar * ccPositionColorHSL_frag;
extern CC_DLL const GLchar * ccPositionColorHSL_vert;
在ccShaders.cpp 中加入代码
const GLchar * ccPositionColorHSL_frag =
#include "ccShad_Hsl.h"
在CCGLProgram.h 中定义
#define KCCShader_Position_hsl "KCCShader_Position_hsl"
在CCShaderCache.cpp 中 追加枚举kCCShaderType_Position_hsl,
在CCShaderCache.cpp 的reloadDefaultShaders中加入代码
p = programForKey(KCCShader_Position_hsl);
p->reset();
loadDefaultShader(p,kCCShaderType_Position_hsl);
在CCShaderCache.cpp 的loadDefaultShader中加入代码
case kCCShaderType_Position_hsl:
p->initWithVertexShaderByteArray(ccPositionTextureColor_vert,ccPositionColorHSL_frag);
p->addAttribute(kCCAttributeNamePosition,kCCVertexAttrib_Position);
p->addAttribute(kCCAttributeNameColor,kCCVertexAttrib_Color);
p->addAttribute(kCCAttributeNameTexCoord,kCCVertexAttrib_TexCoords);
break;
在CCShaderCache.cpp 的loadDefaultShaders中加入代码
p = new CCGLProgram();
loadDefaultShader(p,kCCShaderType_Position_hsl);
m_pPrograms->setObject(p,KCCShader_Position_hsl);
p->release();
if(this->m_use_hsl)
{
m_use_hsl = false;
initHSL();
}
步骤3.
在CCSprite 类中 追加 HSL 接口
- boolm_use_hsl;
- GLfloatm_color_h;
- GLfloatm_color_s;
- GLfloatm_color_l;
GLfloat m_color_a;
GLuint hLocation;
GLuint sLocation;
GLuint lLocation;
GLuint rLocation;
GLuint gLocation;
GLuint bLocation;
GLuint aLocation;
