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- README.TXT for VSA256 Graphics Library Version 4.0 3-24-96
-
- -------------------- FILES IN VSA256.ZIP DISTRIBUTION -----------------
-
- The distribution of the VSA256 Graphics Library Version 4.0
- consists of the 13 files listed below. These files are archived in the
- file VSA256.ZIP. To extract, just type 'PKUNZIP VSA256' in the
- directory that you want the files extracted to.
-
- VSA256MS.LIB VSA256 Graphics Library (Microsoft C compatible).
- VSA256BC.LIB VSA256 Graphics Library (Borland C Compatible).
- VSA.H VSA256 Include file required in your program.
- VSA_FONT.H VSA256 Include file required in your program.
- VSA_DEMO.C VSA256 Demonstration program (Source Code).
- VSA_DEMO.EXE VSA256 Demonstration program (Executable).
- VSA_DEMO.MAK Make File for Microsoft Quick C V2.5 (IDE).
- VSA_DEMO.PRJ Project file for Borland C/C++ V3.1 (IDE).
- VSA_DEMO.IDE Project file for Borland C/C++ V4.0 (IDE).
- VSA256.TXT The VSA256 Users Manual.
- ORDER.TXT A text file order form for registration and upgrades.
- README.TXT This Document
- DRIVERS2.EXE A self extracting archive of VESA BIOS TSRs.
-
-
- -------------- WHAT'S NEW IN VSA256 GRAPHICS LIBRARY V4.0 --------------
- - MAJOR SPEED-UP of all drawing functions!
- - Added page flipping support for double buffered drawing!
- - Made the user definable FONT array expandable, no limit to size of
- character set. Great for foreign languages.
- - Added vsa_get... functions for all existing vsa_set... functions
- - Changed vsa_set_viewport so that 'BOTTOM' can be set beyond bottom of
- displayable video memory. Now the user can use off screen memory to
- store bitmaps for BitBLTs
- - ATI cards are auto detected to set VSA_ATI_COLOR global parameter.
- Manual override capability preserved.
-
- - New routine, vsa_triangle.
- - New routine, vsa_set_draw_page.
- - New routine, vsa_get_draw_page.
- - New routine, vsa_set_view_page.
- - New routine, vsa_get_view_page.
- - New routine, vsa_get_color.
- - New routine, vsa_get_text_color.
- - New routine, vsa_get_viewport.
- - New routine, vsa_get_clip_mode.
- - New routine, vsa_get_text_scale.
- - New routine, vsa_get_text_cursor_mode.
- - New routine, vsa_set_triangle_clip_mode.
- - New routine, vsa_get_triangle_clip_mode.
-
- -------------- Compatibility With Previous VSA256 Version -------------
-
- Between VSA256 version 2.0 and version 3.0, text support was REVAMPED!
- I no longer rely on the video card manufacturers BIOS to get text support.
- Instead I draw each character using 2D vector strokes. The advantages
- are as follows:
-
- - Text now works with ALL video cards!
- - Now text is Infinitely scaleable.
- - Text positioning resolution is down to 1 pixel.
- - Background color is preserved.
- - The programmer can define his own fonts in VSA_FONT.H.
-
- Some minor incompatibilities with VSA256 version 2.0 were introduced
- due to the changes and they are as follows:
-
- - vsa_write_string now takes x,y (in pixel coordinates) instead of
- row,col (in character coordinates) as the first two parameters.
- - The first two parameters of vsa_write_string (x,y) are now int
- instead of unsigned char.
- - The vsa_write_char function was deleted.
- - The supported ASCII characters are the printable characters
- from ASCII code 32 to ASCII code 127.
-
- Your existing code should take very little editing to make these
- changes, especially if you write a macro to edit all occurrences of
- vsa_write_string as follows:
-
- OLD - vsa_write_string(row,col,color,text);
-
- NEW - vsa_write_string(col*XCharSize,row*YCharSize,color,text);
-
-
- ---------------- INSTALLING VESA BIOS EXTENSION DRIVERS ---------------
-
- DRIVERS2.EXE is a self extracting archive file which contains the
- VESA BIOS Extensions. When executed, it will create subdirectories for
- each of the video adapter manufacturers. Within each subdirectory, it
- will place the respective VESA driver. To execute:
-
- 1. Get into the directory where you want the subdirectories
- to be created.
-
- 2. Copy the file DRIVERS2.EXE into this directory.
-
- 3. type drivers2 -d (the -d tells it to create subdirectories).
-
- --------------------------- Trouble Shooting --------------------------
-
- 1.) Please read the VSA256.TXT document, at least sections 1 and 2, to
- make sure you are setting things up right.
-
- 2.) If Turbo C says "Undefined Symbol ___brklvl in module vsa_all0",
- add the following line to the top of your main program file:
-
- unsigned __brklvl;
-
- 3.) This version of the VSA256 Graphics Library has a fix in it to
- support ATI color palettes. Going from 2.0 to 3.0, I switched the way
- I handled color palettes so that it would work with Diamond Vipers video
- cards. Unbeknownst (cool word) to me, this fix wiped out some ATI video
- cards. So, now I give you a global parameter called:
-
- VSA_ATI_COLOR
-
- Typically when you call vsa_init(), VSA_ATI_COLOR defaults to 0, which
- means it is set up for the Diamond Viper, NOT for ATI. Note that this
- is the preferred mode since palette updates in this mode are much, much
- faster. The vsa_init() routine checks to see if you have an ATI card.
- If it detects ATI, it will automatically set VSA_ATI_COLOR = 1. If you
- have an ATI card but autodetect fails, you can override it manually.
- Right after your vsa_init() call, slip in VSA_ATI_COLOR = 1; and you'll
- be swimming with ATI. This mode relies on BIOS calls for the palette
- updates, so its slower ... but it will get ATI users up and running.
-
- 4.) If you are writing your program in C++ and you are getting linker
- errors, its probably because the VSA256 library is compiled with straight
- C. Contact me for a C++ compiled version of the library.
-
- 5.) Tell me if there are any unresolved problems.
-
-
- ------------------------- Assist for 3 Compilers ----------------------
-
- To help get you started, I have provided the "project" files for three
- different compiler Integrated Development Environments (IDEs).
-
- Microsoft Quick C, Version 2.5 ----> VSA_DEMO.MAK
- Borland C/C++, Version 3.1 ----> VSA_DEMO.PRJ
- Borland C/C++, Version 4.0 ----> VSA_DEMO.IDE
-
- Get in the respective IDE and just select/load the appropriate project
- file for your compiler.
-