C++ ccGLEnableVertexAttribs函数代码示例

void TextureSprite::draw()
{
    if (!m_bVisible) return;

    CC_NODE_DRAW_SETUP();

    ccGLBlendFunc(m_sBlendFunc.src, m_sBlendFunc.dst);

    ccGLBindTexture2D(mTexture2D->getName());
    ccGLEnableVertexAttribs(kCCVertexAttribFlag_Position | kCCVertexAttribFlag_TexCoords);

    /// Time offset
    getShaderProgram()->setUniformLocationWith2f(mTimeLocation, mTime.x, mTime.y);
    /// Color
    getShaderProgram()->setUniformLocationWith4f(mColorLocation, mColor.r, mColor.g, mColor.b, mColor.a);
    /// Vertex
    glVertexAttribPointer(kCCVertexAttrib_Position, 3, GL_FLOAT, GL_FALSE, sizeof(ccVertex3F), (void*)&mVertexPos[0]);
    /// Texture coord.
    glVertexAttribPointer(kCCVertexAttrib_TexCoords, 2, GL_FLOAT, GL_FALSE, sizeof(ccTex2F), (void*)&mTexCoords[0]);
    /// Available mode: GL_TRIANGLES, GL_TRIANGLES_STRIP and GL_TRIANGLE_FAN
    glDrawArrays(GL_TRIANGLES, 0, mVertexPos.size());

    /// Do NOT call glFlush or performance will decrease drastically!
    /// glFlush();

    CHECK_GL_ERROR_DEBUG();

    CC_INCREMENT_GL_DRAWS(1);
}

KDvoid Controller::draw ( KDvoid )
{
    CC_NODE_DRAW_SETUP ( );
    
	GLfloat  fVertices [ ] = 
	{
		   0,  512, 
		1024,  512, 
		   0,    0, 
		1024,    0, 
	};

	GLfloat  fCoords [ ] =
	{
		   0,  0,
		   1,  0,
		   0,  1, 
		   1,  1, 
	};

	ccGLBindTexture2D ( m_uTexture );
    ccGLEnableVertexAttribs ( kCCVertexAttribFlag_Position | kCCVertexAttribFlag_TexCoords );

	if ( m_pDrawFunc )
	{
		m_pDrawFunc ( KD_GET_UST2MSEC );
	}

	ccGLVertexAttribPointer ( kCCVertexAttrib_Position , 2, GL_FLOAT, GL_FALSE, 0, fVertices );
	ccGLVertexAttribPointer ( kCCVertexAttrib_TexCoords, 2, GL_FLOAT, GL_FALSE, 0, fCoords );	

	glDrawArrays ( GL_TRIANGLE_STRIP, 0, 4 );

	ccGLBindTexture2D ( 0 );
}

void B2DLayer::draw(){
	CCLayer::draw();
	ccGLEnableVertexAttribs( kCCVertexAttribFlag_Position );
	kmGLPushMatrix();
	world->DrawDebugData();
	kmGLPopMatrix();
}

void EXSunShineSprite::draw()
{
	ccGLEnableVertexAttribs(kCCVertexAttribFlag_PosColorTex);
    m_sBlendFunc.src = GL_DST_COLOR;
    m_sBlendFunc.dst = GL_ONE;
	ccGLBlendFunc( m_sBlendFunc.src, m_sBlendFunc.dst );
    
	this->getShaderProgram()->use();
	this->getShaderProgram()->setUniformsForBuiltins();
    
	ccGLBindTexture2D(  this->getTexture()->getName() );
    
#define kQuadSize sizeof(m_sQuad.bl)
	long offset = (long)&m_sQuad;
    
	// vertex
	int diff = offsetof( ccV3F_C4B_T2F, vertices);
	glVertexAttribPointer(kCCVertexAttrib_Position, 3, GL_FLOAT, GL_FALSE, kQuadSize, (void*) (offset + diff));
    
	// texCoods
	diff = offsetof( ccV3F_C4B_T2F, texCoords);
	glVertexAttribPointer(kCCVertexAttrib_TexCoords, 2, GL_FLOAT, GL_FALSE, kQuadSize, (void*)(offset + diff));
    
	// color
	diff = offsetof( ccV3F_C4B_T2F, colors);
	glVertexAttribPointer(kCCVertexAttrib_Color, 4, GL_UNSIGNED_BYTE, GL_TRUE, kQuadSize, (void*)(offset + diff));
	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
	CC_INCREMENT_GL_DRAWS(1);
}

void ccDrawQuadBezier(const CCPoint& origin, const CCPoint& control, const CCPoint& destination, unsigned int segments)
{
    lazy_init();

    ccVertex2F* vertices = new ccVertex2F[segments + 1];

    float t = 0.0f;
    for(unsigned int i = 0; i < segments; i++)
    {
        vertices[i].x = powf(1 - t, 2) * origin.x + 2.0f * (1 - t) * t * control.x + t * t * destination.x;
        vertices[i].y = powf(1 - t, 2) * origin.y + 2.0f * (1 - t) * t * control.y + t * t * destination.y;
        t += 1.0f / segments;
    }
    vertices[segments].x = destination.x;
    vertices[segments].y = destination.y;

    s_pShader->use();
    s_pShader->setUniformsForBuiltins();
    s_pShader->setUniformLocationWith4fv(s_nColorLocation, (GLfloat*) &s_tColor.r, 1);

    ccGLEnableVertexAttribs( kCCVertexAttribFlag_Position );

    glVertexAttribPointer(kCCVertexAttrib_Position, 2, GL_FLOAT, GL_FALSE, 0, vertices);
    glDrawArrays(GL_LINE_STRIP, 0, (GLsizei) segments + 1);
    CC_SAFE_DELETE_ARRAY(vertices);

    CC_INCREMENT_GL_DRAWS(1);
}

void CCGSpell::onDraw(const Mat4 &transform, uint32_t flags)
{
	// 启用attributes变量输入，顶点坐标，纹理坐标，颜色
	ccGLEnableVertexAttribs(kCCVertexAttribFlag_PosColorTex);

	_pShaderProgram->use();
	_pShaderProgram->setUniformsForBuiltins(transform);

	// 绑定纹理到纹理槽0
	ccGLBindTexture2D(_texture->getName());
	long offset = (long)&_quad;

	// vertex
	int diff = offsetof(V3F_C4B_T2F, vertices);
	glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_POSITION, 3, GL_FLOAT, GL_FALSE, sizeof(V3F_C4B_T2F), (void*)(offset + diff));

	// texCoods
	diff = offsetof(V3F_C4B_T2F, texCoords);
	glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_TEX_COORD, 2, GL_FLOAT, GL_FALSE, sizeof(V3F_C4B_T2F), (void*)(offset + diff));

	// color
	diff = offsetof(V3F_C4B_T2F, colors);
	glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_COLOR, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(V3F_C4B_T2F), (void*)(offset + diff));

	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
	CC_INCREMENT_GL_DRAWS(1);
}

void CCControlSwitchSprite::draw()
{
    CC_NODE_DRAW_SETUP();

    ccGLEnableVertexAttribs(kCCVertexAttribFlag_PosColorTex);
    ccGLBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
    getShaderProgram()->setUniformForModelViewProjectionMatrix();

    glActiveTexture(GL_TEXTURE0);
    glBindTexture( GL_TEXTURE_2D, getTexture()->getName());
    glUniform1i(m_uTextureLocation, 0);

    glActiveTexture(GL_TEXTURE1);
    glBindTexture( GL_TEXTURE_2D, m_pMaskTexture->getName() );
    glUniform1i(m_uMaskLocation, 1);

#define kQuadSize sizeof(m_sQuad.bl)
    long offset = (long)&m_sQuad;

    // vertex
    int diff = offsetof( ccV3F_C4B_T2F, vertices);
    glVertexAttribPointer(kCCVertexAttrib_Position, 3, GL_FLOAT, GL_FALSE, kQuadSize, (void*) (offset + diff));

    // texCoods
    diff = offsetof( ccV3F_C4B_T2F, texCoords);
    glVertexAttribPointer(kCCVertexAttrib_TexCoords, 2, GL_FLOAT, GL_FALSE, kQuadSize, (void*)(offset + diff));

    // color
    diff = offsetof( ccV3F_C4B_T2F, colors);
    glVertexAttribPointer(kCCVertexAttrib_Color, 4, GL_UNSIGNED_BYTE, GL_TRUE, kQuadSize, (void*)(offset + diff));

    glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
    glActiveTexture(GL_TEXTURE0);
}

void ccDrawPoints( const CCPoint *points, unsigned int numberOfPoints )
{
    lazy_init();

    ccGLEnableVertexAttribs( kCCVertexAttribFlag_Position );
    shader_->use();
    shader_->setUniformForModelViewProjectionMatrix();
    shader_->setUniformLocationWith4fv(colorLocation_, (GLfloat*) &color_.r, 1);
    shader_->setUniformLocationWith1f(pointSizeLocation_, pointSize_);

    // XXX: Mac OpenGL error. arrays can't go out of scope before draw is executed
    ccVertex2F* newPoints = new ccVertex2F[numberOfPoints];

    // iPhone and 32-bit machines optimization
    if( sizeof(CCPoint) == sizeof(ccVertex2F) )
    {
        glVertexAttribPointer(kCCVertexAttrib_Position, 2, GL_FLOAT, GL_FALSE, 0, points);
    }
    else
    {
        // Mac on 64-bit
        for( unsigned int i=0; i<numberOfPoints;i++) {
            newPoints[i].x = points[i].x;
            newPoints[i].y = points[i].y;
        }
        glVertexAttribPointer(kCCVertexAttrib_Position, 2, GL_FLOAT, GL_FALSE, 0, newPoints);
    }

    glDrawArrays(GL_POINTS, 0, (GLsizei) numberOfPoints);

    CC_SAFE_DELETE_ARRAY(newPoints);

    CC_INCREMENT_GL_DRAWS(1);
}

void ccDrawPoint( const CCPoint& point )
{
    lazy_init();

    ccVertex2F p;
    p.x = point.x;
    p.y = point.y;

    ccGLEnableVertexAttribs( kCCVertexAttribFlag_Position );
    s_pShader->use();
    s_pShader->setUniformsForBuiltins();

    s_pShader->setUniformLocationWith4fv(s_nColorLocation, (GLfloat*) &s_tColor.r, 1);
    s_pShader->setUniformLocationWith1f(s_nPointSizeLocation, s_fPointSize);

#ifdef EMSCRIPTEN
    setGLBufferData(&p, 8);
    glVertexAttribPointer(kCCVertexAttrib_Position, 2, GL_FLOAT, GL_FALSE, 0, 0);
#else
    glVertexAttribPointer(kCCVertexAttrib_Position, 2, GL_FLOAT, GL_FALSE, 0, &p);
#endif // EMSCRIPTEN

    glDrawArrays(GL_POINTS, 0, 1);

    CC_INCREMENT_GL_DRAWS(1);
}

void ccDrawCubicBezier(const CCPoint& origin, const CCPoint& control1, const CCPoint& control2, const CCPoint& destination, unsigned int segments)
{
    lazy_init();

    ccVertex2F* vertices = new ccVertex2F[segments + 1];

    float t = 0;
    for(unsigned int i = 0; i < segments; i++)
    {
        vertices[i].x = powf(1 - t, 3) * origin.x + 3.0f * powf(1 - t, 2) * t * control1.x + 3.0f * (1 - t) * t * t * control2.x + t * t * t * destination.x;
        vertices[i].y = powf(1 - t, 3) * origin.y + 3.0f * powf(1 - t, 2) * t * control1.y + 3.0f * (1 - t) * t * t * control2.y + t * t * t * destination.y;
        t += 1.0f / segments;
    }
    vertices[segments].x = destination.x;
    vertices[segments].y = destination.y;

    s_pShader->use();
    s_pShader->setUniformsForBuiltins();
    s_pShader->setUniformLocationWith4fv(s_nColorLocation, (GLfloat*) &s_tColor.r, 1);

    ccGLEnableVertexAttribs( kCCVertexAttribFlag_Position );

#ifdef EMSCRIPTEN
    setGLBufferData(vertices, (segments + 1) * sizeof(ccVertex2F));
    glVertexAttribPointer(kCCVertexAttrib_Position, 2, GL_FLOAT, GL_FALSE, 0, 0);
#else
    glVertexAttribPointer(kCCVertexAttrib_Position, 2, GL_FLOAT, GL_FALSE, 0, vertices);
#endif // EMSCRIPTEN
    glDrawArrays(GL_LINE_STRIP, 0, (GLsizei) segments + 1);
    CC_SAFE_DELETE_ARRAY(vertices);

    CC_INCREMENT_GL_DRAWS(1);
}

void BloodFlashSprite::draw()
{
    ccGLEnableVertexAttribs(kCCVertexAttribFlag_PosColorTex);
    ccGLBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

    getShaderProgram()->use();
    getShaderProgram()->setUniformsForBuiltins();

    ccGLBindTexture2D(getTexture()->getName());

    // attributes.
#define kQuadSize sizeof(m_sQuad.bl)
    long offset = (long)&m_sQuad;

    //vertex
    int diff = offsetof(ccV3F_C4B_T2F, vertices);
    glVertexAttribPointer(kCCVertexAttrib_Position, 3, GL_FLOAT, GL_FALSE, kQuadSize, (void*) (offset + diff));

    // texCoods.
    diff = offsetof(ccV3F_C4B_T2F, texCoords);
    glVertexAttribPointer(kCCVertexAttrib_TexCoords, 2, GL_FLOAT, GL_FALSE, kQuadSize, (void*) (offset + diff));

    // color
    diff = offsetof(ccV3F_C4B_T2F, colors);
    glVertexAttribPointer(kCCVertexAttrib_Color, 4, GL_UNSIGNED_BYTE, GL_TRUE, kQuadSize, (void*)(offset + diff));

    glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);

    CC_INCREMENT_GL_DRAWS(1);
}

void SpriteBlur::draw()
{
    ccGLEnableVertexAttribs(kCCVertexAttribFlag_PosColorTex );
    ccGLBlendFunc( m_sBlendFunc.src, m_sBlendFunc.dst );

    getShaderProgram()->use();
    getShaderProgram()->setUniformForModelViewProjectionMatrix();
    getShaderProgram()->setUniformLocationWith2f(blurLocation, blur_.x, blur_.y);
    getShaderProgram()->setUniformLocationWith4fv(subLocation, sub_, 1);

    ccGLBindTexture2D(  getTexture()->getName() );

    //
    // Attributes
    //
#define kQuadSize sizeof(m_sQuad.bl)
    long offset = (long)&m_sQuad;

    // vertex
    int diff = offsetof( ccV3F_C4B_T2F, vertices);
    glVertexAttribPointer(kCCVertexAttrib_Position, 3, GL_FLOAT, GL_FALSE, kQuadSize, (void*) (offset + diff));

    // texCoods
    diff = offsetof( ccV3F_C4B_T2F, texCoords);
    glVertexAttribPointer(kCCVertexAttrib_TexCoords, 2, GL_FLOAT, GL_FALSE, kQuadSize, (void*)(offset + diff));

    // color
    diff = offsetof( ccV3F_C4B_T2F, colors);
    glVertexAttribPointer(kCCVertexAttrib_Color, 4, GL_UNSIGNED_BYTE, GL_TRUE, kQuadSize, (void*)(offset + diff));


    glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);

    CC_INCREMENT_GL_DRAWS(1);
}

void ccDrawSolidPoly( const CCPoint *poli, unsigned int numberOfPoints, ccColor4F color )
{
    lazy_init();

    s_pShader->use();
    s_pShader->setUniformsForBuiltins();
    s_pShader->setUniformLocationWith4fv(s_nColorLocation, (GLfloat*) &color.r, 1);

    ccGLEnableVertexAttribs( kCCVertexAttribFlag_Position );

    // XXX: Mac OpenGL error. arrays can't go out of scope before draw is executed
    ccVertex2F* newPoli = new ccVertex2F[numberOfPoints];

    // iPhone and 32-bit machines optimization
    if( sizeof(CCPoint) == sizeof(ccVertex2F) )
    {
        glVertexAttribPointer(kCCVertexAttrib_Position, 2, GL_FLOAT, GL_FALSE, 0, poli);
    }
    else
    {
        // Mac on 64-bit
        for( unsigned int i=0; i<numberOfPoints; i++)
        {
            newPoli[i] = vertex2( poli[i].x, poli[i].y );
        }
        glVertexAttribPointer(kCCVertexAttrib_Position, 2, GL_FLOAT, GL_FALSE, 0, newPoli);
    }

    glDrawArrays(GL_TRIANGLE_FAN, 0, (GLsizei) numberOfPoints);

    CC_SAFE_DELETE_ARRAY(newPoli);
    CC_INCREMENT_GL_DRAWS(1);
}

void ShaderNode::draw()
{
    CC_NODE_DRAW_SETUP();

    float w = SIZE_X, h = SIZE_Y;
    GLfloat vertices[12] = {0,0, w,0, w,h, 0,0, 0,h, w,h};

    //
    // Uniforms
    //
    getShaderProgram()->setUniformLocationWith2f(m_uniformCenter, m_center.x, m_center.y);
    getShaderProgram()->setUniformLocationWith2f(m_uniformResolution, m_resolution.x, m_resolution.y);


    // time changes all the time, so it is Ok to call OpenGL directly, and not the "cached" version
    glUniform1f(m_uniformTime, m_time);

    ccGLEnableVertexAttribs( kCCVertexAttribFlag_Position );

    glVertexAttribPointer(kCCVertexAttrib_Position, 2, GL_FLOAT, GL_FALSE, 0, vertices);

    glDrawArrays(GL_TRIANGLES, 0, 6);
    
    CC_INCREMENT_GL_DRAWS(1);
}

void CCMotionStreak::draw()
{
    if(m_uNuPoints <= 1)
        return;

    CC_NODE_DRAW_SETUP(this);

    ccGLEnableVertexAttribs(kCCVertexAttribFlag_PosColorTex );
    ccGLBlendFunc( m_tBlendFunc.src, m_tBlendFunc.dst );

    ccGLBindTexture2D( m_pTexture->getName() );
    if(m_pTexture->isETC()) {
        getShaderProgram()->useSeparatedAlphaChannel(m_pTexture->getAlphaChannel()->getName());
    }
    
#ifdef EMSCRIPTEN
    // Size calculations from ::initWithFade
    setGLBufferData(m_pVertices, (sizeof(ccVertex2F) * m_uMaxPoints * 2), 0);
    glVertexAttribPointer(kCCVertexAttrib_Position, 2, GL_FLOAT, GL_FALSE, 0, 0);

    setGLBufferData(m_pTexCoords, (sizeof(ccTex2F) * m_uMaxPoints * 2), 1);
    glVertexAttribPointer(kCCVertexAttrib_TexCoords, 2, GL_FLOAT, GL_FALSE, 0, 0);

    setGLBufferData(m_pColorPointer, (sizeof(GLubyte) * m_uMaxPoints * 2 * 4), 2);
    glVertexAttribPointer(kCCVertexAttrib_Color, 4, GL_UNSIGNED_BYTE, GL_TRUE, 0, 0);
#else
    glVertexAttribPointer(kCCVertexAttrib_Position, 2, GL_FLOAT, GL_FALSE, 0, m_pVertices);
    glVertexAttribPointer(kCCVertexAttrib_TexCoords, 2, GL_FLOAT, GL_FALSE, 0, m_pTexCoords);
    glVertexAttribPointer(kCCVertexAttrib_Color, 4, GL_UNSIGNED_BYTE, GL_TRUE, 0, m_pColorPointer);
#endif // EMSCRIPTEN

    glDrawArrays(GL_TRIANGLE_STRIP, 0, (GLsizei)m_uNuPoints*2);

    CC_INCREMENT_GL_DRAWS(1);
}