在cocos2dx 中添加自定义 shaders --- 改变 HSL 色调,饱和度, 亮度

步骤1

准备shaders文件-ccShad_Hsl.h

@H_772_24@/*
 * cocos2d for iPhone: http://www.cocos2d-iphone.org
 *
 * Copyright (C) 2011 Brian Chapados
 * Permission is hereby granted,free of charge,to any person obtaining a copy
 * of this software and associated documentation files (the "Software"),to deal
 * in the Software without reStriction,including without limitation the rights
 * to use,copy,modify,merge,publish,diStribute,sublicense,and/or sell
 * copies of the Software,and to permit persons to whom the Software is
 * furnished to do so,subject to the following conditions:
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * THE SOFTWARE IS PROVIDED "AS IS",WITHOUT WARRANTY OF ANY KIND,EXPRESS OR
 * IMPLIED,INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITnesS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,DAMAGES OR OTHER
 * LIABILITY,WHETHER IN AN ACTION OF CONTRACT,TORT OR OTHERWISE,ARISING FROM,0)"> * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

" \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\
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\
 else\n\
 ret = v1;\n\
 return ret;\n\
}\n\
void main(void)\n\
{\n\
 float Cmax,Cmin;\n\
 float D;\n\
 float H,S,L;\n\
 float R,G,B;\n\
 vec4 color = texture2D(CC_Texture0,v_texCoord);\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,0)"> L = (Cmax + Cmin) / 2.0;\n\
 if (Cmax == Cmin)\n\
 {\n\
 H = 0.0;\n\
 S = 0.0;\n\
 }\n\
 D = Cmax - Cmin;\n\
 if (L < 0.5)\n\
 S = D / (Cmax + Cmin);\n\
 S = D / (2.0 - (Cmax + Cmin));\n\
 if (R == CmaX)\n\
 H = (G - B) / D;\n\
 } else {\n\
 if (G == CmaX)\n\
 H = 2.0 + (B - R) /D;\n\
 H = 4.0 + (R - G) / D;\n\
 H = H / 6.0;\n\
 // modify H/S/L values\n\
 H += AddHue;\n\
 S += AddSat;\n\
 L += AddLig;\n\
 if (H < 0.0)\n\
 H = H + 1.0;\n\
 H = clamp(H,0.0,1.0);\n\
 S = clamp(S,0)"> L = clamp(L,0)"> // convert BACk to RGB\n\
 float var_2,var_1;\n\
 if (S == 0.0)\n\
 R = L;\n\
 G = L;\n\
 B = L;\n\
 if ( L < 0.5 )\n\
 var_2 = L * ( 1.0 + S );\n\
 var_2 = ( L + S ) - ( S * L );\n\
 var_1 = 2.0 * L - var_2;\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\
 R = R * AddRed;\n\
 G = G * AddGreen;\n\
 B = B * AddBlue;\n\
 gl_FragColor = vec4(R,B,color.a * AddAlpha);\n\
";

将它放入E:\HSluZiLong\cocos2d-x-2.2.1\cocos2d-x-2.2.1\cocos2dx\shaders 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();

步骤3.

在CCSprite 类中 追加 HSL 接口

@H_772_24@ bool m_use_hsl;
 GLfloat m_color_h m_color_s m_color_l m_color_aGLuint hLOCATIOn sLOCATIOn lLOCATIOn rLOCATIOn gLOCATIOn bLOCATIOn aLOCATIOn;

@H_304_@R_262_11235@@copy