mirror of
https://github.com/python-pillow/Pillow.git
synced 2025-10-30 23:47:27 +03:00
312 lines
7.3 KiB
C
312 lines
7.3 KiB
C
/*
|
|
* The Python Imaging Library
|
|
* $Id$
|
|
*
|
|
* imaging display object for Windows
|
|
*
|
|
* history:
|
|
* 1996-05-12 fl Created
|
|
* 1996-05-17 fl Up and running
|
|
* 1996-05-21 fl Added palette stuff
|
|
* 1996-05-26 fl Added query palette and mode inquery
|
|
* 1997-09-21 fl Added draw primitive
|
|
* 1998-01-20 fl Use StretchDIBits instead of StretchBlt
|
|
* 1998-12-30 fl Plugged a resource leak in DeleteDIB (from Roger Burnham)
|
|
*
|
|
* Copyright (c) Secret Labs AB 1997-2001.
|
|
* Copyright (c) Fredrik Lundh 1996.
|
|
*
|
|
* See the README file for information on usage and redistribution.
|
|
*/
|
|
|
|
|
|
#include "Imaging.h"
|
|
|
|
#ifdef WIN32
|
|
|
|
#include "ImDib.h"
|
|
|
|
|
|
char*
|
|
ImagingGetModeDIB(int size_out[2])
|
|
{
|
|
/* Get device characteristics */
|
|
|
|
HDC dc;
|
|
char* mode;
|
|
|
|
dc = CreateCompatibleDC(NULL);
|
|
|
|
mode = "P";
|
|
if (!(GetDeviceCaps(dc, RASTERCAPS) & RC_PALETTE)) {
|
|
mode = "RGB";
|
|
if (GetDeviceCaps(dc, BITSPIXEL) == 1)
|
|
mode = "1";
|
|
}
|
|
|
|
if (size_out) {
|
|
size_out[0] = GetDeviceCaps(dc, HORZRES);
|
|
size_out[1] = GetDeviceCaps(dc, VERTRES);
|
|
}
|
|
|
|
DeleteDC(dc);
|
|
|
|
return mode;
|
|
}
|
|
|
|
|
|
ImagingDIB
|
|
ImagingNewDIB(const char *mode, int xsize, int ysize)
|
|
{
|
|
/* Create a Windows bitmap */
|
|
|
|
ImagingDIB dib;
|
|
RGBQUAD *palette;
|
|
int i;
|
|
|
|
/* Check mode */
|
|
if (strcmp(mode, "1") != 0 && strcmp(mode, "L") != 0 &&
|
|
strcmp(mode, "RGB") != 0)
|
|
return (ImagingDIB) ImagingError_ModeError();
|
|
|
|
/* Create DIB context and info header */
|
|
dib = (ImagingDIB) malloc(sizeof(*dib));
|
|
if (!dib)
|
|
return (ImagingDIB) ImagingError_MemoryError();
|
|
dib->info = (BITMAPINFO*) malloc(sizeof(BITMAPINFOHEADER) +
|
|
256 * sizeof(RGBQUAD));
|
|
if (!dib->info) {
|
|
free(dib);
|
|
return (ImagingDIB) ImagingError_MemoryError();
|
|
}
|
|
|
|
memset(dib->info, 0, sizeof(BITMAPINFOHEADER));
|
|
dib->info->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
|
|
dib->info->bmiHeader.biWidth = xsize;
|
|
dib->info->bmiHeader.biHeight = ysize;
|
|
dib->info->bmiHeader.biPlanes = 1;
|
|
dib->info->bmiHeader.biBitCount = strlen(mode)*8;
|
|
dib->info->bmiHeader.biCompression = BI_RGB;
|
|
|
|
/* Create DIB */
|
|
dib->dc = CreateCompatibleDC(NULL);
|
|
if (!dib->dc) {
|
|
free(dib->info);
|
|
free(dib);
|
|
return (ImagingDIB) ImagingError_MemoryError();
|
|
}
|
|
|
|
dib->bitmap = CreateDIBSection(dib->dc, dib->info, DIB_RGB_COLORS,
|
|
&dib->bits, NULL, 0);
|
|
if (!dib->bitmap) {
|
|
free(dib->info);
|
|
free(dib);
|
|
return (ImagingDIB) ImagingError_MemoryError();
|
|
}
|
|
|
|
strcpy(dib->mode, mode);
|
|
dib->xsize = xsize;
|
|
dib->ysize = ysize;
|
|
|
|
dib->pixelsize = strlen(mode);
|
|
dib->linesize = (xsize * dib->pixelsize + 3) & -4;
|
|
|
|
if (dib->pixelsize == 1)
|
|
dib->pack = dib->unpack = (ImagingShuffler) memcpy;
|
|
else {
|
|
dib->pack = ImagingPackBGR;
|
|
dib->unpack = ImagingPackBGR;
|
|
}
|
|
|
|
/* Bind the DIB to the device context */
|
|
dib->old_bitmap = SelectObject(dib->dc, dib->bitmap);
|
|
|
|
palette = dib->info->bmiColors;
|
|
|
|
/* Bind a palette to it as well (only required for 8-bit DIBs) */
|
|
if (dib->pixelsize == 1) {
|
|
for (i = 0; i < 256; i++) {
|
|
palette[i].rgbRed =
|
|
palette[i].rgbGreen =
|
|
palette[i].rgbBlue = i;
|
|
palette[i].rgbReserved = 0;
|
|
}
|
|
SetDIBColorTable(dib->dc, 0, 256, palette);
|
|
}
|
|
|
|
/* Create an associated palette (for 8-bit displays only) */
|
|
if (strcmp(ImagingGetModeDIB(NULL), "P") == 0) {
|
|
|
|
char palbuf[sizeof(LOGPALETTE)+256*sizeof(PALETTEENTRY)];
|
|
LPLOGPALETTE pal = (LPLOGPALETTE) palbuf;
|
|
int i, r, g, b;
|
|
|
|
/* Load system palette */
|
|
pal->palVersion = 0x300;
|
|
pal->palNumEntries = 256;
|
|
GetSystemPaletteEntries(dib->dc, 0, 256, pal->palPalEntry);
|
|
|
|
if (strcmp(mode, "L") == 0) {
|
|
|
|
/* Greyscale DIB. Fill all 236 slots with a greyscale ramp
|
|
* (this is usually overkill on Windows since VGA only offers
|
|
* 6 bits greyscale resolution). Ignore the slots already
|
|
* allocated by Windows */
|
|
|
|
i = 10;
|
|
for (r = 0; r < 236; r++) {
|
|
pal->palPalEntry[i].peRed =
|
|
pal->palPalEntry[i].peGreen =
|
|
pal->palPalEntry[i].peBlue = i;
|
|
i++;
|
|
}
|
|
|
|
dib->palette = CreatePalette(pal);
|
|
|
|
} else if (strcmp(mode, "RGB") == 0) {
|
|
|
|
#ifdef CUBE216
|
|
|
|
/* Colour DIB. Create a 6x6x6 colour cube (216 entries) and
|
|
* add 20 extra greylevels for best result with greyscale
|
|
* images. */
|
|
|
|
i = 10;
|
|
for (r = 0; r < 256; r += 51)
|
|
for (g = 0; g < 256; g += 51)
|
|
for (b = 0; b < 256; b += 51) {
|
|
pal->palPalEntry[i].peRed = r;
|
|
pal->palPalEntry[i].peGreen = g;
|
|
pal->palPalEntry[i].peBlue = b;
|
|
i++;
|
|
}
|
|
for (r = 1; r < 22-1; r++) {
|
|
/* Black and white are already provided by the cube. */
|
|
pal->palPalEntry[i].peRed =
|
|
pal->palPalEntry[i].peGreen =
|
|
pal->palPalEntry[i].peBlue = r * 255 / (22-1);
|
|
i++;
|
|
}
|
|
|
|
#else
|
|
|
|
/* Colour DIB. Alternate palette. */
|
|
|
|
i = 10;
|
|
for (r = 0; r < 256; r += 37)
|
|
for (g = 0; g < 256; g += 32)
|
|
for (b = 0; b < 256; b += 64) {
|
|
pal->palPalEntry[i].peRed = r;
|
|
pal->palPalEntry[i].peGreen = g;
|
|
pal->palPalEntry[i].peBlue = b;
|
|
i++;
|
|
}
|
|
|
|
#endif
|
|
|
|
#if 0
|
|
{
|
|
/* DEBUG: dump palette to file */
|
|
FILE *err = fopen("dib.pal", "w");
|
|
for (i = 0; i < 256; i++)
|
|
fprintf(err, "%d: %d/%d/%d\n", i,
|
|
pal->palPalEntry[i].peRed,
|
|
pal->palPalEntry[i].peGreen,
|
|
pal->palPalEntry[i].peBlue);
|
|
fclose(err);
|
|
}
|
|
#endif
|
|
|
|
dib->palette = CreatePalette(pal);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return dib;
|
|
}
|
|
|
|
void
|
|
ImagingPasteDIB(ImagingDIB dib, Imaging im, int xy[4])
|
|
{
|
|
/* Paste image data into a bitmap */
|
|
|
|
/* FIXME: check size! */
|
|
|
|
int y;
|
|
for (y = 0; y < im->ysize; y++)
|
|
dib->pack(dib->bits + dib->linesize*(dib->ysize-(xy[1]+y)-1) +
|
|
xy[0]*dib->pixelsize, im->image[y], im->xsize);
|
|
|
|
}
|
|
|
|
void
|
|
ImagingExposeDIB(ImagingDIB dib, int dc)
|
|
{
|
|
/* Copy bitmap to display */
|
|
|
|
if (dib->palette != 0)
|
|
SelectPalette((HDC) dc, dib->palette, FALSE);
|
|
BitBlt((HDC) dc, 0, 0, dib->xsize, dib->ysize, dib->dc, 0, 0, SRCCOPY);
|
|
}
|
|
|
|
void
|
|
ImagingDrawDIB(ImagingDIB dib, int dc, int dst[4], int src[4])
|
|
{
|
|
/* Copy bitmap to printer/display */
|
|
|
|
if (GetDeviceCaps((HDC) dc, RASTERCAPS) & RC_STRETCHDIB) {
|
|
/* stretchdib (printers) */
|
|
StretchDIBits((HDC) dc, dst[0], dst[1], dst[2]-dst[0], dst[3]-dst[1],
|
|
src[0], src[1], src[2]-src[0], src[3]-src[1], dib->bits,
|
|
dib->info, DIB_RGB_COLORS, SRCCOPY);
|
|
} else {
|
|
/* stretchblt (displays) */
|
|
if (dib->palette != 0)
|
|
SelectPalette((HDC) dc, dib->palette, FALSE);
|
|
StretchBlt((HDC) dc, dst[0], dst[1], dst[2]-dst[0], dst[3]-dst[1],
|
|
dib->dc, src[0], src[1], src[2]-src[0], src[3]-src[1],
|
|
SRCCOPY);
|
|
}
|
|
}
|
|
|
|
int
|
|
ImagingQueryPaletteDIB(ImagingDIB dib, int dc)
|
|
{
|
|
/* Install bitmap palette */
|
|
|
|
int n;
|
|
|
|
if (dib->palette != 0) {
|
|
|
|
/* Realize associated palette */
|
|
HPALETTE now = SelectPalette((HDC) dc, dib->palette, FALSE);
|
|
n = RealizePalette((HDC) dc);
|
|
|
|
/* Restore palette */
|
|
SelectPalette((HDC) dc, now, FALSE);
|
|
|
|
} else
|
|
n = 0;
|
|
|
|
return n; /* number of colours that was changed */
|
|
}
|
|
|
|
void
|
|
ImagingDeleteDIB(ImagingDIB dib)
|
|
{
|
|
/* Clean up */
|
|
|
|
if (dib->palette)
|
|
DeleteObject(dib->palette);
|
|
if (dib->bitmap) {
|
|
SelectObject(dib->dc, dib->old_bitmap);
|
|
DeleteObject(dib->bitmap);
|
|
}
|
|
if (dib->dc)
|
|
DeleteDC(dib->dc);
|
|
free(dib->info);
|
|
}
|
|
|
|
#endif /* WIN32 */
|