Forums - Use ATITC Texture Mipmap Failed

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Use ATITC Texture Mipmap Failed
648179967
Join Date: 12 Dec 13
Posts: 4
Posted: Thu, 2014-06-26 03:52
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Hi all

    I use QCompress.exe generate dds with mipmap,format is Q_FORMAT_ATITC_RGBA.And use glCompressedTexImage2D generate mipmap,but the mipmap is error.How to use dds generate compress texture mipmap? 

 code：

 

GLuint * textures = new GLuint[1];
glGenTextures(1, textures);    
int currTextureId=textures[0];    
glBindTexture(GL_TEXTURE_2D, currTextureId);
 
 
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);  
 
int width,height;
width = height = 1024;
 
int size = (((width + 3) >> 2) * ((height + 3) >> 2))*16;
int offset = 0;
 
for(int i = 0; i < 11;i++)
{
LOGI("offset          : %d\n",(int)offset);
LOGI("size            : %d\n",(int)size);
glCompressedTexImage2D( GL_TEXTURE_2D, i, GL_ATC_RGBA_EXPLICIT_ALPHA_AMD, width,  height,  0, size ,  texturebuffer + offset );
checkGlError("glCompressedTexImage2D");
width /=2; 
height /=2; 
offset += size;
size = (((width + 3) >> 2) * ((height + 3) >> 2))*16;
 
} 

   

Thanks ALL

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Re: Use ATITC Texture Mipmap Failed
mtrusten
Join Date: 24 Jun 14
Posts: 1
Posted: Thu, 2014-06-26 09:03
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Thanks for posting the code. This helps a lot. One question I have still is what error are you receiving from GL?

? = checkGlError("glCompressedTexImage2D");

This will greatly help in being able to quickly find the issue.

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Re: Use ATITC Texture Mipmap Failed
648179967
Join Date: 12 Dec 13
Posts: 4
Posted: Thu, 2014-06-26 18:29
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Thanks for reply

static void checkGlError(const char* op)
{
    for (GLint error = glGetError(); error; error = glGetError())
    {
        LOGI("after %s() glError (0x%x)\n", op, error);
    }
}
 
glGetError return nothing.But i use Adreno Profiler,capture frame ,the texture mipmap is not correct.The GL_ATC_RGBA_EXPLICIT_ALPHA_AMD is not generate mipmap?
 
Thanks!
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Re: Use ATITC Texture Mipmap Failed
Dave Astle
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Join Date: 19 Oct 12
Location: San Diego, CA
Posts: 99
Posted: Mon, 2014-07-07 09:55
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It looks like there may be an issue with Qcompress correctly generating DDS files. Are you able to try using KTX instead to see if you still experience this problem?

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