aa_context *aa_autoinit(__AA_CONST struct aa_hardware_params *params)
{
aa_context *context = NULL;
int i = 0;
char *t;
while ((t = aa_getfirst(&aa_displayrecommended)) != NULL) {
if (context == NULL) {
for (i = 0; aa_drivers[i] != NULL; i++) {
if (!strcmp(t, aa_drivers[i]->name) || !strcmp(t, aa_drivers[i]->shortname)) {
context = aa_init(aa_drivers[i], params, NULL);
break;
}
}
if (aa_drivers[i] == NULL)
printf("Driver %s unknown", t);
free(t);
}
}
i = 0;
while (context == NULL) {
if (aa_drivers[i] == NULL)
return NULL;
context = aa_init(aa_drivers[i], params, NULL);
i++;
}
return (context);
}
int main(int argc, char* argv[]) {
if (argc < 3) {
fprintf(stderr, "Usage: %s IN_FILE OUT_FILE", argv[0]);
exit(1);
}
MagickWand* m_wand;
// Initialize
MagickWandGenesis();
m_wand = NewMagickWand();
// read image
if (MagickReadImage(m_wand, argv[1]) == MagickFalse) {
fprintf(stderr, "Cannot read image: %s\n", argv[1]);
exit(1);
}
// resize
MagickResizeImage(m_wand, WIDTH, HEIGHT, LanczosFilter, 1.0);
// ready for using AAlib
aa_context* c;
aa_savedata save_data = {
argv[2],
&aa_text_format,
NULL
};
// Initialize AAlib
c = aa_init(&save_d, &aa_defparams, (const void*) &save_data);
if (c == NULL) {
fprintf(stderr, "Cannot initialize AA-lib\n");
exit(1);
}
// record image data to AAlib image buffer
PixelIterator* iter = NewPixelIterator(m_wand);
PixelWand** pix;
unsigned long num_wands;
double h, s, l;
int x, y;
y = 0;
while ((pix = PixelGetNextIteratorRow(iter, &num_wands)) != NULL) {
for (x = 0; x < num_wands; ++x) {
PixelGetHSL(pix[x], &h, &s, &l);
aa_putpixel(c, x, y, 256*l);
}
y++;
}
// rendering ascii and print file
aa_fastrender(c, 0, 0, aa_scrwidth(c), aa_scrheight(c));
aa_flush(c);
// terminate
aa_close(c);
// finalize to finish
if (m_wand) {
m_wand = DestroyMagickWand(m_wand);
}
MagickWandTerminus();
return 0;
}
status_t
AalibTranslator::DerivedTranslate(BPositionIO *source,
const translator_info *info, BMessage *ioExtension,
uint32 outType, BPositionIO *target, int32 baseType)
{
if(baseType == 1 && outType == AALIB_TEXT_FORMAT) {
BBitmap *originalbmp, *greyscalebmp;
BRect bounds;
int imgWidth;
int imgHeight;
int imgHalfWidth;
int imgHalfHeight;
aa_context *context;
aa_renderparams *params;
aa_palette palette;
struct aa_hardware_params hwparams;
// get the image
originalbmp = BTranslationUtils::GetBitmap(source);
if(originalbmp == NULL) {
return B_ERROR;
}
// get the image size
bounds = originalbmp->Bounds();
imgWidth = bounds.IntegerWidth()+1;
imgHeight = bounds.IntegerHeight()+1;
// convert the bitmap to greyscale
greyscalebmp = new BBitmap(bounds, B_GRAY8);
if(greyscalebmp->ImportBits(originalbmp) != B_OK) {
return B_ERROR;
}
// get half the height and width, rounded up
// aalib outputs half the height and width of the original
if(imgWidth%2 == 1)
imgHalfWidth = (imgWidth+1)/2;
else
imgHalfWidth = imgWidth/2;
if(imgHeight%2 == 1)
imgHalfHeight = (imgHeight+1)/2;
else
imgHalfHeight = imgHeight/2;
// use some custom settings
memcpy(&hwparams, &aa_defparams, sizeof(struct aa_hardware_params));
hwparams.font = NULL; // default font
// output is half of original width and height
hwparams.width = imgHalfWidth;
hwparams.height = imgHalfHeight;
// new aalib context
// use mem_d (memory drive) as we will get the output ourselves
context = aa_init(&mem_d, &hwparams, NULL);
if(context == NULL)
return B_ERROR;
// we can't use memcpy, as the image width
// might not be equal to the bytes per row
/*memcpy(context->imagebuffer,
greyscalebmp->Bits(),
imgWidth*imgHeight);*/
// get the location of the bitmap bits, and the bytes per row
unsigned char *bitsLocation = (unsigned char*)greyscalebmp->Bits();
int bytesPerRow = greyscalebmp->BytesPerRow();
for(int y=0; y<imgHeight; y++) { // for each row and column
for(int x=0; x<imgWidth; x++) {
// set the pixel
// 255- is to invert the greyscale image
aa_putpixel(context, x, y,
255-(bitsLocation[y*bytesPerRow+x]));
}
}
// render the image
params = aa_getrenderparams();
aa_render(context, params, 0, 0, imgWidth, imgHeight);
for(int i=0; i<imgHalfHeight; i++) { // for each row
if(i != 0) { // after first line, write newline
target->Write("\n",1);
}
// output that line
target->Write(context->textbuffer+i*imgHalfWidth,imgHalfWidth);
}
aa_close(context);
free(originalbmp);
delete greyscalebmp;
delete originalbmp;
return B_OK;
}
return B_NO_TRANSLATOR;
}
