int png_to_img(const char * filename, uint32 mask, kos_img_t * rv) {
uint16 *temp_tex;
/* More stuff */
uint8 *buffer; /* Output row buffer */
uint32 row_stride; /* physical row width in output buffer */
uint32 channels; /* 3 for RGB 4 for RGBA */
FILE *infile; /* source file */
void *strs; /* internal structs */
assert( rv != NULL );
if ((infile = fopen(filename, "r")) == 0) {
dbglog(DBG_ERROR, "png_to_texture: can't open %s\n", filename);
return -1;
}
/* Step 1: Initialize loader */
strs = readpng_init(infile);
if (!strs) {
fclose(infile);
return -2;
}
/* Step 1.5: Create output kos_img_t */
/* rv = (kos_img_t *)malloc(sizeof(kos_img_t)); */
/* Step 2: Read file */
buffer = readpng_get_image(strs,&channels, &row_stride, &rv->w, &rv->h);
temp_tex = (uint16 *)malloc(sizeof(uint16) * rv->w * rv->h);
rv->data = (void *)temp_tex;
rv->byte_count = rv->w * rv->h * 2;
_png_copy_texture(buffer, temp_tex,
channels, row_stride,
mask, rv->w, rv->h);
switch (mask) {
case PNG_NO_ALPHA:
rv->fmt = KOS_IMG_FMT(KOS_IMG_FMT_RGB565, 0);
break;
case PNG_MASK_ALPHA:
rv->fmt = KOS_IMG_FMT(KOS_IMG_FMT_ARGB1555, 0);
break;
case PNG_FULL_ALPHA:
rv->fmt = KOS_IMG_FMT(KOS_IMG_FMT_ARGB4444, 0);
break;
}
/* Step 3: Finish decompression */
free(buffer);
readpng_cleanup(strs);
fclose(infile);
/* And we're done! */
return 0;
}
int get_image_png(const char * filename, image_t * image) {
uint8 *temp_tex;
/* More stuff */
uint8 *buffer; /* Output row buffer */
uint32 row_stride; /* physical row width in output buffer */
uint32 channels; /* 3 for RGB 4 for RGBA */
FILE *infile; /* source file */
assert(image != NULL);
if((infile = fopen(filename, "rb")) == 0) {
printf("png_to_texture: can't open %s\n", filename);
return -1;
}
/* Step 1: Initialize loader */
if(readpng_init(infile)) {
fclose(infile);
return -2;
}
/* Step 1.5: Create output kos_img_t */
/* rv = (kos_img_t *)malloc(sizeof(kos_img_t)); */
/* Step 2: Read file */
buffer = readpng_get_image(&channels, &row_stride, &image->w, &image->h);
temp_tex = (uint8 *)malloc(sizeof(uint8) * 4 * image->w * image->h);
image->data = (unsigned char *)temp_tex;
image->bpp = 4;
image->stride = image->w * 4;
_png_copy_texture(buffer, temp_tex,
channels, row_stride,
image->w, image->h);
/* Step 3: Finish decompression */
free(buffer);
readpng_cleanup();
fclose(infile);
/* And we're done! */
return 0;
}
void swft_import_png( xmlXPathParserContextPtr ctx, int nargs ) {
xsltTransformContextPtr tctx;
char *filename;
xsltDocumentPtr xsltdoc;
xmlDocPtr doc = NULL;
xmlNodePtr node;
xmlXPathObjectPtr obj;
char tmp[TMP_STRLEN];
png_colorp palette;
int n_pal;
int format = 5;
int data_size = 0;
xmlXPathStringFunction(ctx, 1);
if (ctx->value->type != XPATH_STRING) {
xsltTransformError(xsltXPathGetTransformContext(ctx), NULL, NULL,
"swft:import-png() : invalid arg expecting a string\n");
ctx->error = XPATH_INVALID_TYPE;
return;
}
obj = valuePop(ctx);
if (obj->stringval == NULL) {
valuePush(ctx, xmlXPathNewNodeSet(NULL));
return;
}
tctx = xsltXPathGetTransformContext(ctx);
filename = swft_get_filename(obj->stringval, ctx->context->doc->URL);
bool quiet = true;
xmlXPathObjectPtr quietObj = xsltVariableLookup( tctx, (const xmlChar*)"quiet", NULL );
if (quietObj && quietObj->stringval) {
quiet = !strcmp("true", (const char*)quietObj->stringval );
}
FILE *fp = fopen( filename, "rb" );
if( !fp ) {
xsltTransformError(xsltXPathGetTransformContext(ctx), NULL, NULL,
"swft:import-png() : failed to read file '%s'\n", filename);
valuePush(ctx, xmlXPathNewNodeSet(NULL));
goto fail;
}
doc = xmlNewDoc( (const xmlChar *)"1.0");
doc->xmlRootNode = xmlNewDocNode( doc, NULL, (const xmlChar *)"png", NULL );
node = doc->xmlRootNode;
swft_addFileName( node, filename );
// add data
rewind(fp);
unsigned char *data, *compressed;
unsigned long w, h, rowbytes;
int channels;
int compressed_size;
if( !fp ) goto fail;
if( readpng_init( fp, &w, &h ) ) goto fail;
// add w/h
snprintf(tmp, TMP_STRLEN, "%lu", w);
xmlSetProp( node, (const xmlChar *)"width", (const xmlChar *)&tmp );
snprintf(tmp,TMP_STRLEN,"%lu", h);
xmlSetProp( node, (const xmlChar *)"height", (const xmlChar *)&tmp );
data = readpng_get_image( 2.2, &channels, &rowbytes, &palette, &n_pal );
if( !quiet ) {
fprintf(stderr,"Importing PNG: '%s' (%lu bit/pixel)\n", filename, (rowbytes*8)/w );
}
if( channels == 4 && rowbytes == (4*w) ) {
int c;
float a;
unsigned char r,g,b;
for( int i=0; i<w*h*4; i+=4 ) {
a = data[i+3]/255.0;
r = (unsigned char)((data[i+0])*a);
g = (unsigned char)((data[i+1])*a);
b = (unsigned char)((data[i+2])*a);
data[i] = data[i+3];
data[i+1] = r;
data[i+2] = g;
data[i+3] = b;
}
data_size = w*h*4;
} else if( channels == 3 && rowbytes == (3*w) ) {
unsigned char *rgba = new unsigned char[ w*h*4 ];
for( int i=0; i<w*h; i++ ) {
rgba[i*4] = 0xff;
rgba[(i*4)+3] = data[(i*3)+2];
rgba[(i*4)+2] = data[(i*3)+1];
rgba[(i*4)+1] = data[(i*3)];
}
data = rgba;
data_size = w*h*4;
} else if( channels == 1 && rowbytes == w ) {
unsigned char *img_data = data;
format = 3;
int bpr = rowbytes;
bpr += (rowbytes % 4) ? 4 - (rowbytes % 4) : 0;
if( n_pal ) {
data_size = (4*n_pal) + (bpr*h);
data = new unsigned char[ data_size ];
for( int i=0; i<n_pal; i++ ) {
unsigned char *entry = &data[(i*4)];
entry[2] = palette[i].blue;
entry[1] = palette[i].green;
entry[0] = palette[i].red;
entry[3] = 0xff;
}
} else {
n_pal = 0xff;
data_size = (4*n_pal) + (bpr*h);
data = new unsigned char[ data_size ];
for( int i=0; i<n_pal; i++ ) {
unsigned char *entry = &data[(i*4)];
entry[2] = i;
entry[1] = i;
entry[0] = i;
entry[3] = 0xff;
}
}
/* copy row by row with 32bit alignment */
unsigned char *dst = &data[ (4*n_pal) ];
unsigned char *src = img_data;
memset( dst, 0, bpr*h );
for( int y=0; y<h; y++ ) {
memcpy( dst, src, rowbytes );
dst += bpr;
src += rowbytes;
}
snprintf(tmp,TMP_STRLEN,"%i", n_pal-1 );
xmlSetProp( node, (const xmlChar *)"n_colormap", (const xmlChar *)&tmp );
} else {
fprintf(stderr,
"WARNING: can only import 8bit palette, 24 or 32bit "
"RGB(A) PNGs (%s has %i channels, rowstride %lu)\n",
filename, channels, rowbytes);
goto fail;
}
// format is 5 for RGB(A), 3 for palette (4 for 16bit, unused)
snprintf(tmp,TMP_STRLEN,"%i", format );
xmlSetProp( node, (const xmlChar *)"format", (const xmlChar *)&tmp );
compressed_size = data_size;
if( compressed_size < 1024 ) compressed_size = 1024;
compressed = new unsigned char[ compressed_size ];
if( compress( data, data_size, compressed, &compressed_size ) ) {
swft_addData( node, (char*)compressed, compressed_size );
valuePush( ctx, xmlXPathNewNodeSet( (xmlNodePtr)doc ) );
}
goto end;
fail:
fprintf( stderr, "WARNING: could not import %s\n", filename );
end:
if (fp) {
fclose(fp);
}
delete compressed;
delete filename;
readpng_cleanup( true );
}
int img_load_data(FILE *f, IMG_INFO *info, kos_img_t *img)
{
uint32 channels, rowBytes;
uint8 *data = NULL;
uint8 allocate = 0;
if (info == NULL)
{
allocate = 1;
info = (IMG_INFO *)malloc(sizeof(IMG_INFO));
memset(&info,0,sizeof(IMG_INFO));
}
switch(info->type)
{
case IMG_FILE_GUESS:
return -1;
break;
case IMG_FILE_JPEG:
{
readjpeg_init(f);
data = readjpeg_get_image(&channels, &rowBytes, &img->w, &img->h);
readjpeg_cleanup();
break;
}
case IMG_FILE_PNG:
{
readpng_init(f);
data = readpng_get_image(&channels, &rowBytes, &img->w, &img->h);
readpng_cleanup();
break;
}
case IMG_FILE_BMP:
{
readbmp_init(f);
data = readbmp_get_image(&channels, &rowBytes, &img->w, &img->h);
readbmp_cleanup();
break;
}
case IMG_FILE_PCX:
{
readpcx_init(f);
data = readpcx_get_image(&channels, &rowBytes, &img->w, &img->h);
readpcx_cleanup();
break;
}
}
if (info->dither_width == 0)
info->dither_width = img->w;
if (info->dither_height == 0)
info->dither_height = img->h;
img->data = (uint16 *)malloc(sizeof(uint16)*img->w*img->h);
img->byte_count = sizeof(uint16)*img->w*img->h;
img_copy_texture(img->data, data, channels, rowBytes, info,
img->w, img->h);
free(data);
if (allocate)
{
free(info);
}
switch(info->alpha)
{
case IMG_ALPHA_NONE:
img->fmt = KOS_IMG_FMT(KOS_IMG_FMT_RGB565, 0);
break;
case IMG_ALPHA_MASK:
img->fmt = KOS_IMG_FMT(KOS_IMG_FMT_ARGB1555, 0);
break;
case IMG_ALPHA_KEYED:
img->fmt = KOS_IMG_FMT(KOS_IMG_FMT_ARGB1555, 0);
break;
case IMG_ALPHA_FULL:
img->fmt = KOS_IMG_FMT(KOS_IMG_FMT_ARGB4444, 0);
break;
}
return 0;
}
