flat assembler - View topic - sdl output in fasm?

Ok guys,
so this is what i found without any hacking now that is closest to dos graphic screen buffer rendering:

(the other one i found is xvideo -for x-window system- that is somewhat similar but said to be hard to be used in asm..., another one is /dev/fb but that looks like to get more and more phased out...)

windowed test:

Code:

#include <SDL/SDL.h>
#include <stdio.h>
#include <stdlib.h>
Uint16 CreateHicolorPixel(SDL_PixelFormat * fmt, Uint8 red,
Uint8 green, Uint8 blue)
{
Uint16 value;
/* This series of bit shifts uses the information from the
SDL_Format structure to correctly compose a 16-bit pixel
value from 8-bit red, green, and blue data. */
value = ((red >> fmt->Rloss) << fmt->Rshift) +
((green >> fmt->Gloss) << fmt->Gshift) +
((blue >> fmt->Bloss) << fmt->Bshift);
return value;
}
int main()
{
SDL_Surface *screen;
Uint16 *raw_pixels;
int x, y;

/* Initialize SDL’s video system and check for errors. */
if (SDL_Init(SDL_INIT_VIDEO) != 0) {
printf("Unable to initialize SDL: %s\n", SDL_GetError());
return 1;
}
/* Make sure SDL_Quit gets called when the program exits! */
atexit(SDL_Quit);
/* Attempt to set a 256x256 hicolor (16-bit) video mode.
This will set some type of 16-bit mode, but we won’t
know which particular pixel format ahead of time. If
the video card can’t handle hicolor modes, SDL will
emulate it. */
screen = SDL_SetVideoMode(256, 256, 16, 0);
if (screen == NULL) {
printf("Unable to set video mode: %s\n", SDL_GetError());
return 1;
}
/* Video memory can be strange, and it’s sometimes necessary to
"lock" it before it can be modified. SDL abstracts this with
the SDL_LockSurface function. */
SDL_LockSurface(screen);
/* Get a pointer to the video surface’s memory. */
raw_pixels = (Uint16 *) screen->pixels;
/* We can now safely write to the video surface. We’ll draw a
nice gradient pattern by varying our red and blue components
along the X and Y axes. Notice the formula used to calculate
the offset into the framebuffer for each pixel.
(The pitch is the number of bytes per scanline in memory.) */
for (x = 0; x < 256; x++) {
for (y = 0; y < 256; y++) {
Uint16 pixel_color;
int offset;
pixel_color = CreateHicolorPixel(screen->format,
x, 0, y);
offset = (screen->pitch / 2 * y + x);
raw_pixels[offset] = pixel_color;

}
}
/* We’re finished drawing, so unlock the surface. */
SDL_UnlockSurface(screen);
/* Inform SDL that the screen has been changed. This is
necessary because SDL’s screen surface is not always the real
framebuffer; it is sometimes emulated behind the scenes. */
SDL_UpdateRect(screen, 0, 0, 0, 0);
/* Pause for a few seconds as the viewer gasps in awe. */
SDL_Delay(3000);
return 0;
}

fullscreen test:

Code:

#include <SDL/SDL.h>
#include <stdio.h>
#include <stdlib.h>
int main()
{
SDL_Surface *screen;
/* Initialize SDL’s video system and check for errors */
if (SDL_Init(SDL_INIT_VIDEO) != 0) {
printf("Unable to initialize SDL: %s\n", SDL_GetError());
return 1;
}
/* Make sure SDL_Quit gets called when the program exits! */
atexit(SDL_Quit);
/* Attempt to set a 640x480 hicolor video mode */
screen = SDL_SetVideoMode(640, 480, 16, SDL_FULLSCREEN);
if (screen == NULL) {
printf("Unable to set video mode: %s\n", SDL_GetError());
return 1;
}
/* If we got this far, everything worked */
printf("Success!\n");

/* Example of direct pixel access with SDL. */
Uint16 CreateHicolorPixel(SDL_PixelFormat * fmt, Uint8 red,
Uint8 green, Uint8 blue)
{
Uint16 value;
/* This series of bit shifts uses the information from the
SDL_Format structure to correctly compose a 16-bit pixel
value from 8-bit red, green, and blue data. */
value = ((red >> fmt->Rloss) << fmt->Rshift) +
((green >> fmt->Gloss) << fmt->Gshift) +
((blue >> fmt->Bloss) << fmt->Bshift);
return value;
}

Uint16 *raw_pixels;
int x, y, i;

/*Video memory can be strange, and it’s sometimes necessary to
"lock" it before it can be modified. SDL abstracts this with
the SDL_LockSurface function. */
SDL_LockSurface(screen);
/* Get a pointer to the video surface’s memory. */
raw_pixels = (Uint16 *) screen->pixels;
/* We can now safely write to the video surface. We’ll draw a
nice gradient pattern by varying our red and blue components
along the X and Y axes. Notice the formula used to calculate
the offset into the framebuffer for each pixel.
(The pitch is the number of bytes per scanline in memory.) */
for (i = 0; i < 400; i+=4) {
for (x = 0; x < 640; x++) {
for (y = 0; y < 480; y++) {
Uint16 pixel_color;
int offset;
pixel_color = CreateHicolorPixel(screen->format,
round ((sin ((y+i)*(3.14159/(480+i))))*200), round ((sin ((i+x)*(3.14159/(640+i))))*200), round ((sin ((y+x+i)*(3.14159/(480+x+y+i))))*200));
offset = (screen->pitch / 2 * y + x);
raw_pixels[offset] = pixel_color;

}
}
/*SDL_Delay(10);*/

/* We’re finished drawing, so unlock the surface. */
SDL_UnlockSurface(screen);
/* Inform SDL that the screen has been changed. This is
necessary because SDL’s screen surface is not always the real
framebuffer; it is sometimes emulated behind the scenes. */
SDL_UpdateRect(screen, 0, 0, 0, 0);
/* Pause for a few seconds as the viewer gasps in awe. */
}
SDL_Delay(3000);
return 0;
}

to compile you need to do:

Code:

gcc sdltest.c -o sdltest `sdl-config --cflags --libs`

anyone willing to help port it to be used with FASM?