Customized Adreno Profiler

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Kanglai Qian 9月 02, 2015

Recently I found an interesting bug with Adreno Profiler: this cannot work correctly with glVertexAttribPointer(indx=2, size=4, type=GL_HALF_FLOAT_OES, normalized=False, stride=32, ptr=0xC). For example, texcoords in half type are presented as strange numbers:

adreno_profiler_half_wrong

I tried to seek help from developers’ forum but got no response yet. After two days’ part time work, I solved this bug by myself.

adreno_profiler_half_correct

Since I have no access to the source code, I have to decompile it with ILSpy. The key codes can be found in QXProfilerControlsCS.dll. I replace the implemention for public static float HalfToFloat(uint half) in StateDataStoreHelper.cs with codes from CShart Half. (In fact, I’ve got no idea what does the original code mean…)

Also, I improve the Save Vertex Data button so the exported model file can be imported into other tools directly. At the same time, some more codes for checking are added, because I’ve encountered several crashes when saving vertex data.

for (int i = 0; i < drawCall.VertexBuffer.ColumnNames.Count; i++)
{
for (int j = 0; j < drawCall.VertexBuffer.Rows.Count; j++)
{
string text = drawCall.VertexBuffer.ColumnNames[i].ToString();
int num = 0;
while (num <= text.Length && text[num] != ' ' && text[num] != '\0')
{
num++;
}
string text2 = "";
// Kanglai: prevent crash
if(drawCall.VertexBuffer.Rows[j] != null && drawCall.VertexBuffer.Rows[j].Count > i)
{
text2 = drawCall.VertexBuffer.Rows[j][i].ToString();
}
string str = text2.Replace(",", "");
//Kanglai: modify existing column name
string col = text.Substring(0, num);
if (col.Equals("_glesVertex"))
col = "v";
else if (col.Equals("_glesNormal"))
col = "vn";
else if (col.Equals("_glesMultiTexCoord0"))
col = "vt";
else
col = "#" + col;
streamWriter.WriteLine(col + " " + str);
}
}

2015.10.17: Add support for alpha channel. Just save texture as PNG :D