订阅
步骤1
准备 shaders文件- ccShad_Hsl.h
/*
* 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,
* 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\
\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\
\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\
else\n\
{\n\
D = Cmax - Cmin;\n\
if (L < 0.5)\n\
{\n\
S = D / (Cmax + Cmin);\n\
}\n\
else\n\
{\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\
else\n\
{\n\
H = 4.0 + (R - G) / D;\n\
}\n\
}\n\
H = H / 6.0;\n\
}\n\
\n\
// modify H/S/L values\n\
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, 0.0, 1.0);\n\
L = clamp(L, 0.0, 1.0);\n\
\n\
// convert back to RGB\n\
float var_2, var_1;\n\
\n\
if (S == 0.0)\n\
{\n\
R = L;\n\
G = L;\n\
B = L;\n\
}\n\
else\n\
{\n\
if ( L < 0.5 )\n\
{\n\
var_2 = L * ( 1.0 + S );\n\
}\n\
else\n\
{\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, var_2, H );\n\
B = Hue_2_RGB( var_1, var_2, 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,G,B, color.a * AddAlpha);\n\
\n\
}\n\
";
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
bool m_use_hsl;
GLfloat m_color_h;
GLfloat m_color_s;
GLfloat m_color_l;
GLfloat m_color_a;
GLuint hLocation;
GLuint sLocation;
GLuint lLocation;
GLuint rLocation;
GLuint gLocation;
GLuint bLocation;
GLuint aLocation;
在 CCSprite.cpp 的 updateBlendFunc中追加代码
if(m_use_hsl)
{
ccBlendFunc blend = getBlendFunc();
if(m_color_l > 0)
blend.src = GL_SRC_ALPHA;
else
blend.src = GL_ONE;
blend.dst = GL_ONE_MINUS_SRC_ALPHA;
setBlendFunc(blend);
}
在 CCSprite.cpp 的 setTexture中追加代码
if(this->m_use_hsl)
{
m_use_hsl = false;
initHSL();
}
在 CCSprite.cpp 的 draw 开头插入代码
if(m_use_hsl)
{
drawHSL();
return;
}
调用接口
报|字号 订阅
