PNG Grayscale Image Data

Source image: grayscale, 128×179

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[0] [1] ........ [127] src_rows[0] 7 7 ........ 5 src_rows[1] 31 31 ........ 21 | src_rows[178] 223 223 ........ 205

Pixel brightness values can be found be simple array access:

• Top left: src_rows[0][0]
• Top right: src_rows[0][127]
• Bottom right: src_rows[178][127]
• etc.