Went from V2 to V3.7 ported OpenGL code and got errors and questions now? Error: Failed to make complete framer buffer object 0x8CD9

cocos2d-x
#1

Hi!
Did go from V2 to V3 but now i got an annoying error/issue in openGL? Used to get gradient but now i got plain color in V2 but after i’ve updated the code it doesn’t work as it should…
This is the code:

[code]Sprite* HelloWorld::spriteWithColor(Color4F bgColor, float textureWidth, float textureHeight)

{

// 1: Create new CCRenderTexture

RenderTexture* rt = RenderTexture::create(textureWidth, textureHeight);



// 2: Call CCRenderTexture:begin

rt->beginWithClear(bgColor.r, bgColor.g, bgColor.b, bgColor.a);



// 3: Draw into the texture

float gradientAlpha = 0.7;

Point vertices[4];

Color4F colors[4];

int nVertices = 0;



   vertices[nVertices] = Point(0, 0);

colors[nVertices++] = (Color4F){0, 0, 0, 0 };

vertices[nVertices] = Point(textureWidth, 0);

colors[nVertices++] = (Color4F){0, 0, 0, 0 };

vertices[nVertices] = Point(0, textureHeight);

colors[nVertices++] = (Color4F){0, 0, 0, gradientAlpha};

vertices[nVertices] = Point(textureWidth, textureHeight);

colors[nVertices++] = (Color4F){0, 0, 0, gradientAlpha};



// Set the shader program for OpenGL

  this->setGLProgram(ShaderCache::getInstance()->getGLProgram(GLProgram::SHADER_NAME_POSITION_COLOR));

CC_NODE_DRAW_SETUP();



GL::enableVertexAttribs(GL::VERTEX_ATTRIB_FLAG_COLOR  | GL::VERTEX_ATTRIB_FLAG_POSITION);



glVertexAttribPointer(GL::VERTEX_ATTRIB_FLAG_POSITION, 2, GL_FLOAT, GL_FALSE, 0, vertices);

glVertexAttribPointer(GL::VERTEX_ATTRIB_FLAG_COLOR, 4, GL_FLOAT, GL_FALSE, 0, colors);

glBlendFunc(CC_BLEND_SRC, CC_BLEND_DST);

glDrawArrays(GL_TRIANGLE_STRIP, 0, (GLsizei)nVertices);





Sprite* noise = Sprite::create("Noise.png");

noise->setScaleY(1536/512);

noise->setScaleX(2048/512);

BlendFunc myBlend;

myBlend.src = GL_DST_COLOR;

myBlend.dst = GL_ZERO;

noise->setBlendFunc(myBlend);



noise->setPosition(Vec2(textureWidth/2, textureHeight/2));

noise->visit();



// 4: Call CCRenderTexture:end

rt->end();



// 5: Create a new Sprite from the texture

return Sprite::createWithTexture(rt->getSprite()->getTexture());

}

[/code]
So, this works in V2 ofc without the updating of the code…But i know it should give the same…But in V3 it just gives a plain color, no gradient??
THEN i searched on google for some solutions and i found one without any comments on but it was from one of cocos2d-x’s developers so that should work too, here’s the code from him:

[code]Sprite* HelloWorld::spriteWithColor(cocos2d::Color4F bgColor, float textureWidth, float textureHeight)
{
RenderTexture *rt = RenderTexture::create(textureWidth, textureHeight);

rt->beginWithClear(bgColor.r, bgColor.g, bgColor.b, bgColor.a);

CustomCommand _customCommand;
// 3: Draw into the texture
//Caution!!!  if you want to use your own opengl draw call ,you must wrap them with a custom command
_customCommand.init(rt->getGlobalZOrder());
_customCommand.func = CC_CALLBACK_0(HelloWorld::onDraw,this);
auto renderer = Director::getInstance()->getRenderer();
renderer->addCommand(&_customCommand);



rt->end();


return Sprite::createWithTexture(rt->getSprite()->getTexture());

}

void HelloWorld::onDraw()
{
this->setGLProgram(ShaderCache::getInstance()->getGLProgram(GLProgram::SHADER_NAME_POSITION_COLOR));
this->getGLProgram()->use();
this->getGLProgram()->setUniformsForBuiltins();

Size winSize = Director::getInstance()->getVisibleSize();


float gradientAlpha =  0.7;
Vec2 vertices[4];
Color4F colors[4];
int nVertices = 0;

vertices[nVertices] = Vec2(0, 0);
colors[nVertices++] = (Color4F){0, 0, 0, 0 };
vertices[nVertices] = Vec2(winSize.width, 0);
colors[nVertices++] = (Color4F){0, 0, 0, 0};
vertices[nVertices] = Vec2(0, winSize.height);
colors[nVertices++] = (Color4F){0, 0, 0, gradientAlpha};
vertices[nVertices] = Vec2(winSize.width, winSize.height);
colors[nVertices++] = (Color4F){0, 0, 0, gradientAlpha};

GL::enableVertexAttribs(GL::VERTEX_ATTRIB_FLAG_COLOR | GL::VERTEX_ATTRIB_FLAG_POSITION);

glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_POSITION, 2, GL_FLOAT, GL_FALSE, 0, vertices);
glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_COLOR, 4, GL_FLOAT, GL_FALSE, 0, colors);
glBlendFunc(CC_BLEND_SRC, CC_BLEND_DST);
glDrawArrays(GL_TRIANGLE_STRIP, 0, (GLsizei)nVertices);

}
[/code]
But that gives me a plain color too!! This is so annoying and that’s one of the reasons i won’t change to V3
but everyone says i should…:confused:
Please help, Thanks!!
Much appreciated…
@slackmoehrle, @owen, @pandamicro…I think the second code snippet was from owen, so maybe you know that i shall do? I just tagged you guys because i know u are in with all this!
Thanks again!

#2

The way Ive used custom commands is to create a subclassed sprite, and to add my GL calls to a custom command that I add to the renderer each time the visit member of the Sprite is called.

I can see that your use case is a bit different - you are trying to render to a RenderTexture just once at sprite creation, so I would guess that just getting a Renderer outside of the paint loop needs a bit more setup to work successfully. Does a breakpoint in the onDraw method ever actually break?

#3

Thanks so much for the quick reply!
Okay, so i’ve tried to set a breakpoint the OnDraw func but apparently it’s not getting called?
Any suggestions? and why doesn’t the first code snippet work when it worked successfully in V2? I have even updated the code…

Thanks!

#4

I would try adding a call to renderer->render(); to actually get it to execute the command list.

Detect Touch in cocos2d-x V3.7?
#5

Thanks for ur time but it still doesn’t work…
Anybody, this is probably what the game consists…OpenGL? any suggestions?

#6

Ok, so i’ve just tried @owen 's code snippet in a new project just in case:

[code]// on “init” you need to initialize your instance
bool HelloWorld::init()
{
//////////////////////////////
// 1. super init first
if ( !Layer::init() )
{
return false;
}

Size visibleSize = Director::getInstance()->getVisibleSize();
Vec2 origin = Director::getInstance()->getVisibleOrigin();

Color4F CCCc= Color4F(9, 244, 77, 1);

// add "HelloWorld" splash screen"
auto sprite = spriteWithColor(Color4F::BLUE, 1024, 768);

// position the sprite on the center of the screen
sprite->setPosition(Vec2(visibleSize.width/2 + origin.x, visibleSize.height/2 + origin.y));

// add the sprite as a child to this layer
this->addChild(sprite, 0);

return true;

}

Sprite* HelloWorld::spriteWithColor(cocos2d::Color4F bgColor, float textureWidth, float textureHeight)
{
RenderTexture *rt = RenderTexture::create(textureWidth, textureHeight);
rt->retain();
rt->beginWithClear(bgColor.r, bgColor.g, bgColor.b, bgColor.a);

CustomCommand _customCommand ;
// 3: Draw into the texture
//Caution!!!  if you want to use your own opengl draw call ,you must wrap them with a custom command
_customCommand.init(rt->getGlobalZOrder());
_customCommand.func = CC_CALLBACK_0(HelloWorld::onDraw,this);
auto renderer = Director::getInstance()->getRenderer();
renderer->addCommand(&_customCommand);

renderer->render();

rt->end();


return Sprite::createWithTexture(rt->getSprite()->getTexture());

}

void HelloWorld::onDraw()
{
this->setGLProgram(ShaderCache::getInstance()->getGLProgram(GLProgram::SHADER_NAME_POSITION_COLOR));
this->getGLProgram()->use();
this->getGLProgram()->setUniformsForBuiltins();

Size winSize = Director::getInstance()->getVisibleSize();


float gradientAlpha =  0.7;
Vec2 vertices[4];
Color4F colors[4];
int nVertices = 0;

vertices[nVertices] = Vec2(0, 0);
colors[nVertices++] = (Color4F){0, 0, 0, 0 };
vertices[nVertices] = Vec2(winSize.width, 0);
colors[nVertices++] = (Color4F){0, 0, 0, 0};
vertices[nVertices] = Vec2(0, winSize.height);
colors[nVertices++] = (Color4F){0, 0, 0, gradientAlpha};
vertices[nVertices] = Vec2(winSize.width, winSize.height);
colors[nVertices++] = (Color4F){0, 0, 0, gradientAlpha};

GL::enableVertexAttribs(GL::VERTEX_ATTRIB_FLAG_COLOR | GL::VERTEX_ATTRIB_FLAG_POSITION);

glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_POSITION, 2, GL_FLOAT, GL_FALSE, 0, vertices);
glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_COLOR, 4, GL_FLOAT, GL_FALSE, 0, colors);
glBlendFunc(CC_BLEND_SRC, CC_BLEND_DST);
glDrawArrays(GL_TRIANGLE_STRIP, 0, (GLsizei)nVertices);

}
[/code]
So there is a gradient and i tried it on a real device, iPad 4…But now it says,
TryOpenGl-mobile[941:494567] Failed to make complete framebuffer object 0x8CD9
OpenGL error 0x0506 in /Users/Admin/Downloads/cocos2d-x-3.7/TryOpenGl/cocos2d/cocos/renderer/CCFrameBuffer.cpp applyFBO 444

Why? If someone answer, Thank you so much<3

Update: And can’t i just use the first code snippet i showed, it’s way much faster to create and you can have different functions in the same class…??? and isn’t cocos2d-x 3 alpha 0 much more easier than v3.7…I don’t understand the developers atm…:confused: And no matter what size i put in the parameter of the "spriteWithColor func i’m always getting the outcome to be fullscreen? this is so annoying!
Last thing, this code works in cocos2d-x 3 alpha 0: [code]Sprite* HelloWorld::spriteWithColor(cocos2d::Color4F bgColor, float textureWidth, float textureHight)
{
//1: Create new RenderTexture
RenderTexture* rt = RenderTexture::create(textureWidth, textureHight);

//2: Call RenderTexture:begin
rt->beginWithClear(bgColor.r, bgColor.g, bgColor.b, bgColor.a);
this->setShaderProgram(ShaderCache::getInstance()->getProgram(GLProgram::SHADER_NAME_POSITION_COLOR));
CC_NODE_DRAW_SETUP();
//3: Draw into the texture
float gradientAlpha = 0.7f;
Point vertices[4];
Color4F colors[4];
int nVertices = 0;
vertices[nVertices] = Point(0, 0);
colors[nVertices++] = Color4F(0, 0, 0, 0);


vertices[nVertices] = Point(textureWidth, 0);
colors[nVertices++] = Color4F(0, 0, 0, 0);
vertices[nVertices] = Point(0, textureHight);

colors[nVertices++] = Color4F(0, 0, 0, gradientAlpha);
vertices[nVertices] = Point(textureWidth, textureHight);
colors[nVertices++] = Color4F(0, 0, 0, gradientAlpha);

GL::enableVertexAttribs(GL::VERTEX_ATTRIB_FLAG_POSITION | GL::VERTEX_ATTRIB_FLAG_COLOR);
glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_POSITION, 2, GL_FLOAT, GL_FALSE, 0, vertices);
glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_COLOR, 4, GL_FLOAT, GL_FALSE, 0, colors);


glBlendFunc(CC_BLEND_SRC, CC_BLEND_DST);
glDrawArrays(GL_TRIANGLE_STRIP, 0, (GLsizei)nVertices);
//3: Draw into the texture
//You'll add this later



//4: Call RenderTexture:end
rt->end();
return Sprite::createWithTexture(rt->getSprite()->getTexture());

}
[/code]
Why can’t you u just use that code in v 3.7? and what should ii do then!?
Please help!
Thanks!

#7

I will investigate your code later. Thanks for mention me.

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