/* Read from the file header dimensions as well as max
* int value used
*/
static int read_ppm_init_rest(int fd, struct ppm_info *ppm)
{
/* Read size. */
ppm->x = ppm_getuint(fd);
ppm->y = ppm_getuint(fd);
#ifdef HAVE_LCD_COLOR
ppm->native_img_size = ppm->x * ppm->y * FB_DATA_SZ;
#endif
if (ppm->native_img_size > ppm->buf_size) {
return PLUGIN_OUTOFMEM;
}
/* Read maxval. */
ppm->maxval = ppm_getuint(fd);
if (ppm->maxval > PPM_OVERALLMAXVAL) {
ppm_error("maxval of input image (%u) is too large. "\
"The maximum allowed by the PPM is %u.",
ppm->maxval, PPM_OVERALLMAXVAL);
return PLUGIN_ERROR;
}
if (ppm->maxval == 0) {
ppm_error("maxval of input image is zero.");
return PLUGIN_ERROR;
}
return PLUGIN_OK;
}
int read_ppm_init_rest(int fd,
int * const cols,
int * const rows,
int * const maxval)
{
/* Read size. */
*cols = ppm_getuint(fd);
*rows = ppm_getuint(fd);
if ((long unsigned int)(*cols * *rows) > PPM_MAXSIZE) {
ppm_error("Imagesize (%ld pixels) is too large. "\
"The maximum allowed is %ld.",
(long unsigned int)(*cols * *rows),
(long unsigned int)PPM_MAXSIZE);
return PLUGIN_ERROR;
}
/* Read maxval. */
*maxval = ppm_getuint(fd);
if (*maxval > PPM_OVERALLMAXVAL) {
ppm_error("maxval of input image (%u) is too large. "\
"The maximum allowed by the PPM is %u.",
*maxval, PPM_OVERALLMAXVAL);
return PLUGIN_ERROR;
}
if (*maxval == 0) {
ppm_error("maxval of input image is zero.");
return PLUGIN_ERROR;
}
return 1;
}
static int read_ppm_row(int fd, struct ppm_info *ppm, int row)
{
int col;
int r, g, b;
#ifdef HAVE_LCD_COLOR
#if defined(LCD_STRIDEFORMAT) && LCD_STRIDEFORMAT == VERTICAL_STRIDE
fb_data *dst = (fb_data *) ppm->buf + row;
const int stride = ppm->x;
#else
fb_data *dst = (fb_data *) ppm->buf + ppm->x*row;
const int stride = 1;
#endif
#endif /* HAVE_LCD_COLOR */
switch (ppm->format) {
case PPM_FORMAT:
for (col = 0; col < ppm->x; ++col) {
r = ppm_getuint(fd);
g = ppm_getuint(fd);
b = ppm_getuint(fd);
if (r == PLUGIN_ERROR || g == PLUGIN_ERROR ||
b == PLUGIN_ERROR)
{
return PLUGIN_ERROR;
}
*dst = FB_RGBPACK(
(255 * r)/ppm->maxval,
(255 * g)/ppm->maxval,
(255 * b)/ppm->maxval);
dst += stride;
}
break;
case RPPM_FORMAT:
for (col = 0; col < ppm->x; ++col) {
r = ppm_getrawsample(fd, ppm->maxval);
g = ppm_getrawsample(fd, ppm->maxval);
b = ppm_getrawsample(fd, ppm->maxval);
if (r == PLUGIN_ERROR || g == PLUGIN_ERROR ||
b == PLUGIN_ERROR)
{
return PLUGIN_ERROR;
}
*dst = FB_RGBPACK(
(255 * r)/ppm->maxval,
(255 * g)/ppm->maxval,
(255 * b)/ppm->maxval);
dst += stride;
}
break;
default:
ppm_error("What?!");
return PLUGIN_ERROR;
}
return PLUGIN_OK;
}
int read_ppm_row(int fd,
int const row,
int const cols,
int const rows,
int const maxval,
int const format)
{
#if !(defined(LCD_STRIDEFORMAT) && LCD_STRIDEFORMAT == VERTICAL_STRIDE)
(void) rows;
#endif
int col;
int r, g, b;
switch (format) {
case PPM_FORMAT:
for (col = 0; col < cols; ++col) {
r = ppm_getuint(fd);
g = ppm_getuint(fd);
b = ppm_getuint(fd);
if (r == PLUGIN_ERROR || g == PLUGIN_ERROR ||
b == PLUGIN_ERROR)
{
return PLUGIN_ERROR;
}
*BUFADDR(col, row, cols, rows) = LCD_RGBPACK(
(255 / maxval) * r,
(255 / maxval) * g,
(255 / maxval) * b);
}
break;
case RPPM_FORMAT:
for (col = 0; col < cols; ++col) {
r = ppm_getrawsample(fd, maxval);
g = ppm_getrawsample(fd, maxval);
b = ppm_getrawsample(fd, maxval);
if (r == PLUGIN_ERROR || g == PLUGIN_ERROR ||
b == PLUGIN_ERROR)
{
return PLUGIN_ERROR;
}
*BUFADDR(col, row, cols, rows) = LCD_RGBPACK(
(255 / maxval) * r,
(255 / maxval) * g,
(255 / maxval) * b);
}
break;
default:
ppm_error("What?!");
return PLUGIN_ERROR;
}
return 1;
}
