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Creating BMPs with text strings


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I have seen this question asked (and ) before, but my needs are a little different so I am only 90% of the way. Hope someone can give the final puzzle piece.

Here is what I need:

* from a text file which is Unicode UTF8 (BOM), read strings one by one

* create a BMP file of 300 px high and place textline on it

- BMP must be 2 bit (b/w only)

* save BMP

* read next line

In the end there is as many different BMPs as there are lines in text file.

I know how to operate _GDI_GraphicsDrawstring, that part is simple.

But what I can't find the answer to is

1) how to calculate the space needed horizontally by a given string in 300 px height

2) how to create a white-background BMP in memory, so it can be populated and written to disc.

Point 2) is the most important, the auto-font-size-calculation can come later. For now it's trial and error.

Referring to ImageMagick, this would be


The purpose is to use images in an industrial microcontroller. Therefore the need for 2bit BMP and 300px exact in height.

Thanks for any help

I am just a hobby programmer, and nothing great to publish right now.

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B&W is 1bpp , not 2 ?

1) Give by Melba23 a try.

2) Create a 1bpp graphics of the required size, draw text inside it and save it as BMP.

Look at (for instance) You don't need much of it but it should have you started. There are many graphics examples around.

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I asked a somewhat related question, and ended up solving it with the help of monoscout999:

I think perhaps you can modify the _GDIPlus_BitmapCreateFromScan0() function to create the base image that you want (see it at the bottom of monoscout999's code).

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