DOS ain't dead

pnglib 1.0, is a free library to read and display PNG images, and is a creation of Thomas Bleeker.
The original code is x86-asm. She(the code) can be link without Zlib.
With the author's permission, Leisure bamboo translate her to c, in the website http://pnglib.sourceforge.net

She(the code) can be compile by turbo c 2.0, and run in pure dos or dosbox.
We can see her in https://sourceforge.net/projects/pnglib/files/pnglib.c/sample.tc2/

She can decompress apng(Animated PNG) now,
There are some demo file 01.png, 04.png ... 32.png in her root folder.
And we show them by her demo LD_FILE.EXE(27k for tc2, 16bit code)
Here is a screen capture(268k).

---
interest in Turbo c, and another traditional program.

Nice work! I want to look closer at this but haven't found the time.

Why prefer TC 2.01 over newer TC++ 1.01? Both are freeware, but the newer has less bugs.

Yes, this is good to have a 16-bit PNG viewer, most (all?) others are 386+. Do you only support VGA (presumably simpler to do) so far?

> Nice work! I want to look closer at this but haven't found the time.
Thank you.
---------------------

> Why prefer TC 2.01 over newer TC++ 1.01? Both are freeware, but the newer
> has less bugs.
The original x86-asm32 code is written by Thomas, only for masm32.
I translate her(the code) into c version.
Now, she can be compile by borland c 4.5, visual c 6.0,
keil c51 7.5, arm-linux-gcc, or others.
And she can run in dos(dosbox),window, c51's uv2 simulator,arm9 singlechip now.

Turbo c 2.0 is one of above compilers.
---------------------

> Yes, this is good to have a 16-bit PNG viewer, most (all?) others are 386+.
> Do you only support VGA (presumably simpler to do) so far?
In sample.tc2\ld_file.c\int show_bmp_fail(void),
I use vesa(sorry for my poor code):
> if(biBitCount==1)/* mono */
> {grahy_mode(0x105);/* 1024 x768 x 256 */
> pallete(palete,2);
> sub_show(8,1024);
> }
>
> else if(biBitCount==4)/* 16 color */
> {grahy_mode(0x105);/* 1024 x768 x 256 */
> pallete(palete,16);
> sub_show(8,1024);
> }
>
> else if(biBitCount==8)/* 256 color */
> {grahy_mode(0x105);/* 1024 x768 x 256 */
> pallete(palete,256);
> sub_show(8,1024);
> }
>
> else if(biBitCount==16)/* 64K color */
> {grahy_mode(0x117);/* 1024 x 768 x RGB565 */
> sub_show(16,2048);
> }
>
> else if(biBitCount==24)/* 16M color */
> {grahy_mode(0x117);/* 1024 x 768 x RGB565 */
> sub_show(16,2048);
> }
>
> else if(biBitCount==32)/* 4G color */
> {grahy_mode(0x117);/* 1024 x 768 x RGB565 */
> sub_show(16,2048);
> }
>
> else {puts("unknown bmp format\0\$");
> return(1);
> }
Rewrite these code, we can support another screen mode.

---
interest in Turbo c, and another traditional program.