基于cocos2dx openGL ES 实现的动画批处理shader
下面是一个基于cocos2dx OpenGL ES 实现的动画批处理 Shader：
#ifndef __Game__CCMyShader__
#define __Game__CCMyShader__
using namespace cocos2d;
class CCMyShader
{
public:
static void initSharder()
{
initSharder_normal();
initSharder_alpha();
}
private:
static void initSharder_normal()
{
const char* frag1 =
" \n\
#ifdef GL_ES \n\
precision lowp float; \n\
#endif \n\
varying vec4 v_fragmentColor; \n\
varying vec2 v_texCoord; \n\
uniform vec4 u_color; \n\
void main() \n\
{ \n\
gl_FragColor = v_fragmentColor * texture2D(CC_Texture0, v_texCoord) * u_color; \n\
}";
auto p1 = new GLProgram();
p1->initWithByteArrays(ccPositionTextureColor_vert, frag1);
//p1->initWithByteArrays(ccPositionTextureColor_vert, ccPositionTextureColor_frag);
GLProgramCache::getInstance()->addGLProgram(p1, "animation_shader");
CHECK_GL_ERROR_DEBUG();
p1->bindAttribLocation(GLProgram::ATTRIBUTE_NAME_POSITION, GLProgram::VERTEX_ATTRIB_POSITION);
p1->bindAttribLocation(GLProgram::ATTRIBUTE_NAME_TEX_COORD, GLProgram::VERTEX_ATTRIB_TEX_COORDS);
p1->bindAttribLocation(GLProgram::ATTRIBUTE_NAME_COLOR, GLProgram::VERTEX_ATTRIB_COLOR);
CHECK_GL_ERROR_DEBUG();
p1->link();
CHECK_GL_ERROR_DEBUG();
p1->updateUniforms();
CHECK_GL_ERROR_DEBUG();
}
static void initSharder_alpha()
{
const char* frag2 =
" \n\
#ifdef GL_ES \n\
precision lowp float; \n\
#endif \n\
varying vec4 v_fragmentColor; \n\
varying vec2 v_texCoord; \n\
uniform vec4 u_color; \n\
void main() \n\
{ \n\
gl_FragColor = v_fragmentColor * texture2D(CC_Texture0, v_texCoord) * u_color * v_fragmentColor.a; \n\
}";
auto p2 = new GLProgram();
p2->initWithByteArrays(ccPositionTextureColor_vert, frag2);
GLProgramCache::getInstance()->addGLProgram(p2, "animation_shader_alpha");
CHECK_GL_ERROR_DEBUG();
p2->bindAttribLocation(GLProgram::ATTRIBUTE_NAME_POSITION, GLProgram::VERTEX_ATTRIB_POSITION);
p2->bindAttribLocation(GLProgram::ATTRIBUTE_NAME_TEX_COORD, GLProgram::VERTEX_ATTRIB_TEX_COORDS);
p2->bindAttribLocation(GLProgram::ATTRIBUTE_NAME_COLOR, GLProgram::VERTEX_ATTRIB_COLOR);
CHECK_GL_ERROR_DEBUG();
p2->link();
CHECK_GL_ERROR_DEBUG();
p2->updateUniforms();
CHECK_GL_ERROR_DEBUG();
}
static void initSharder_lighten()
{
const char* frag2 =
" \n\
#ifdef GL_ES \n\
precision lowp float; \n\
#endif \n\
varying vec4 v_fragmentColor; \n\
varying vec2 v_texCoord; \n\
uniform vec4 u_color; \n\
void main() \n\
{ \n\
gl_FragColor = v_fragmentColor * texture2D(CC_Texture0, v_texCoord) * u_color * v_fragmentColor.a; \n\
}";
auto p2 = new GLProgram();
p2->initWithByteArrays(ccPositionTextureColor_vert, frag2);
GLProgramCache::getInstance()->addGLProgram(p2, "animation_shader_lighten");
CHECK_GL_ERROR_DEBUG();
p2->bindAttribLocation(GLProgram::ATTRIBUTE_NAME_POSITION, GLProgram::VERTEX_ATTRIB_POSITION);
p2->bindAttribLocation(GLProgram::ATTRIBUTE_NAME_TEX_COORD, GLProgram::VERTEX_ATTRIB_TEX_COORDS);
p2->bindAttribLocation(GLProgram::ATTRIBUTE_NAME_COLOR, GLProgram::VERTEX_ATTRIB_COLOR);
CHECK_GL_ERROR_DEBUG();
p2->link();
CHECK_GL_ERROR_DEBUG();
p2->updateUniforms();
CHECK_GL_ERROR_DEBUG();
}
};
#endif /* defined(__Game__CCMyShader__) */
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