ImagingPalette
ImagingPaletteNewBrowser(void)
{
/* Create a standard "browser" palette object */
int i, r, g, b;
ImagingPalette palette;
palette = ImagingPaletteNew("RGB");
if (!palette)
return NULL;
/* Blank out unused entries */
/* FIXME: Add 10-level windows palette here? */
for (i = 0; i < 10; i++) {
palette->palette[i*4+0] =
palette->palette[i*4+1] =
palette->palette[i*4+2] = 0;
}
/* Simple 6x6x6 colour cube */
for (b = 0; b < 256; b += 51)
for (g = 0; g < 256; g += 51)
for (r = 0; r < 256; r += 51) {
palette->palette[i*4+0] = r;
palette->palette[i*4+1] = g;
palette->palette[i*4+2] = b;
i++;
}
/* Blank out unused entries */
/* FIXME: add 30-level greyscale wedge here? */
for (; i < 256; i++) {
palette->palette[i*4+0] =
palette->palette[i*4+1] =
palette->palette[i*4+2] = 0;
}
return palette;
}
Imaging
ImagingNewPrologueSubtype(const char *mode, int xsize, int ysize, int size)
{
Imaging im;
/* linesize overflow check, roughly the current largest space req'd */
if (xsize > (INT_MAX / 4) - 1) {
return (Imaging) ImagingError_MemoryError();
}
im = (Imaging) calloc(1, size);
if (!im) {
return (Imaging) ImagingError_MemoryError();
}
/* Setup image descriptor */
im->xsize = xsize;
im->ysize = ysize;
im->type = IMAGING_TYPE_UINT8;
if (strcmp(mode, "1") == 0) {
/* 1-bit images */
im->bands = im->pixelsize = 1;
im->linesize = xsize;
} else if (strcmp(mode, "P") == 0) {
/* 8-bit palette mapped images */
im->bands = im->pixelsize = 1;
im->linesize = xsize;
im->palette = ImagingPaletteNew("RGB");
} else if (strcmp(mode, "PA") == 0) {
/* 8-bit palette with alpha */
im->bands = 2;
im->pixelsize = 4; /* store in image32 memory */
im->linesize = xsize * 4;
im->palette = ImagingPaletteNew("RGB");
} else if (strcmp(mode, "L") == 0) {
/* 8-bit greyscale (luminance) images */
im->bands = im->pixelsize = 1;
im->linesize = xsize;
} else if (strcmp(mode, "LA") == 0) {
/* 8-bit greyscale (luminance) with alpha */
im->bands = 2;
im->pixelsize = 4; /* store in image32 memory */
im->linesize = xsize * 4;
} else if (strcmp(mode, "La") == 0) {
/* 8-bit greyscale (luminance) with premultiplied alpha */
im->bands = 2;
im->pixelsize = 4; /* store in image32 memory */
im->linesize = xsize * 4;
} else if (strcmp(mode, "F") == 0) {
/* 32-bit floating point images */
im->bands = 1;
im->pixelsize = 4;
im->linesize = xsize * 4;
im->type = IMAGING_TYPE_FLOAT32;
} else if (strcmp(mode, "I") == 0) {
/* 32-bit integer images */
im->bands = 1;
im->pixelsize = 4;
im->linesize = xsize * 4;
im->type = IMAGING_TYPE_INT32;
} else if (strcmp(mode, "I;16") == 0 || strcmp(mode, "I;16L") == 0 \
|| strcmp(mode, "I;16B") == 0 || strcmp(mode, "I;16N") == 0) {
/* EXPERIMENTAL */
/* 16-bit raw integer images */
im->bands = 1;
im->pixelsize = 2;
im->linesize = xsize * 2;
im->type = IMAGING_TYPE_SPECIAL;
} else if (strcmp(mode, "RGB") == 0) {
/* 24-bit true colour images */
im->bands = 3;
im->pixelsize = 4;
im->linesize = xsize * 4;
} else if (strcmp(mode, "BGR;15") == 0) {
/* EXPERIMENTAL */
/* 15-bit true colour */
im->bands = 1;
im->pixelsize = 2;
im->linesize = (xsize*2 + 3) & -4;
im->type = IMAGING_TYPE_SPECIAL;
} else if (strcmp(mode, "BGR;16") == 0) {
/* EXPERIMENTAL */
/* 16-bit reversed true colour */
im->bands = 1;
im->pixelsize = 2;
im->linesize = (xsize*2 + 3) & -4;
im->type = IMAGING_TYPE_SPECIAL;
} else if (strcmp(mode, "BGR;24") == 0) {
/* EXPERIMENTAL */
/* 24-bit reversed true colour */
im->bands = 1;
im->pixelsize = 3;
im->linesize = (xsize*3 + 3) & -4;
im->type = IMAGING_TYPE_SPECIAL;
} else if (strcmp(mode, "BGR;32") == 0) {
/* EXPERIMENTAL */
/* 32-bit reversed true colour */
im->bands = 1;
im->pixelsize = 4;
im->linesize = (xsize*4 + 3) & -4;
im->type = IMAGING_TYPE_SPECIAL;
} else if (strcmp(mode, "RGBX") == 0) {
/* 32-bit true colour images with padding */
im->bands = im->pixelsize = 4;
im->linesize = xsize * 4;
} else if (strcmp(mode, "RGBA") == 0) {
/* 32-bit true colour images with alpha */
im->bands = im->pixelsize = 4;
im->linesize = xsize * 4;
} else if (strcmp(mode, "RGBa") == 0) {
/* 32-bit true colour images with premultiplied alpha */
im->bands = im->pixelsize = 4;
im->linesize = xsize * 4;
} else if (strcmp(mode, "CMYK") == 0) {
/* 32-bit colour separation */
im->bands = im->pixelsize = 4;
im->linesize = xsize * 4;
} else if (strcmp(mode, "YCbCr") == 0) {
/* 24-bit video format */
im->bands = 3;
im->pixelsize = 4;
im->linesize = xsize * 4;
} else if (strcmp(mode, "LAB") == 0) {
/* 24-bit color, luminance, + 2 color channels */
/* L is uint8, a,b are int8 */
im->bands = 3;
im->pixelsize = 4;
im->linesize = xsize * 4;
} else if (strcmp(mode, "HSV") == 0) {
/* 24-bit color, luminance, + 2 color channels */
/* L is uint8, a,b are int8 */
im->bands = 3;
im->pixelsize = 4;
im->linesize = xsize * 4;
} else {
free(im);
return (Imaging) ImagingError_ValueError("unrecognized image mode");
}
/* Setup image descriptor */
strcpy(im->mode, mode);
/* Pointer array (allocate at least one line, to avoid MemoryError
exceptions on platforms where calloc(0, x) returns NULL) */
im->image = (char **) calloc((ysize > 0) ? ysize : 1, sizeof(void *));
if ( ! im->image) {
free(im);
return (Imaging) ImagingError_MemoryError();
}
/* Initialize alias pointers to pixel data. */
switch (im->pixelsize) {
case 1: case 2: case 3:
im->image8 = (UINT8 **) im->image;
break;
case 4:
im->image32 = (INT32 **) im->image;
break;
}
ImagingDefaultArena.stats_new_count += 1;
return im;
}
