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Pillow/display.c
Nicolas F 052ea606bf Clean up defines and includes for Windows 
1)  Renamed USE_INLINE to PIL_USE_INLINE to avoid conflicts with
    other headers/libraries.

2)  Replace __WIN32__ and WIN32 with _WIN32

3)  Don't define WIN32 when the compiler is MSVC but not on Windows
    Why would you even...

4)  Don't define strcasecmp if you're not even going to use it.

5)  Don't include Windows.h with undefs for compilers newer than
    1998 everywhere.

6)  Don't surpress warnings for MSVC++ 4.0. People still using
    MSVC++ 4.0 deserve it.

7)  Don't include things that are already included in Windows.h
2014-05-09 21:05:30 +02:00

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/*
* The Python Imaging Library.
*
* display support (and other windows-related stuff)
*
* History:
* 1996-05-13 fl Windows DIB support
* 1996-05-21 fl Added palette stuff
* 1996-05-28 fl Added display_mode stuff
* 1997-09-21 fl Added draw primitive
* 2001-09-17 fl Added ImagingGrabScreen (from _grabscreen.c)
* 2002-05-12 fl Added ImagingListWindows
* 2002-11-19 fl Added clipboard support
* 2002-11-25 fl Added GetDC/ReleaseDC helpers
* 2003-05-21 fl Added create window support (including window callback)
* 2003-09-05 fl Added fromstring/tostring methods
* 2009-03-14 fl Added WMF support (from pilwmf)
*
* Copyright (c) 1997-2003 by Secret Labs AB.
* Copyright (c) 1996-1997 by Fredrik Lundh.
*
* See the README file for information on usage and redistribution.
*/
#include "Python.h"
#include "Imaging.h"
#include "py3.h"
/* -------------------------------------------------------------------- */
/* Windows DIB support */
#ifdef _WIN32
#include "ImDib.h"
typedef struct {
PyObject_HEAD
ImagingDIB dib;
} ImagingDisplayObject;
static PyTypeObject ImagingDisplayType;
static ImagingDisplayObject*
_new(const char* mode, int xsize, int ysize)
{
ImagingDisplayObject *display;
if (PyType_Ready(&ImagingDisplayType) < 0)
return NULL;
display = PyObject_New(ImagingDisplayObject, &ImagingDisplayType);
if (display == NULL)
return NULL;
display->dib = ImagingNewDIB(mode, xsize, ysize);
if (!display->dib) {
Py_DECREF(display);
return NULL;
}
return display;
}
static void
_delete(ImagingDisplayObject* display)
{
if (display->dib)
ImagingDeleteDIB(display->dib);
PyObject_Del(display);
}
static PyObject*
_expose(ImagingDisplayObject* display, PyObject* args)
{
int hdc;
if (!PyArg_ParseTuple(args, "i", &hdc))
return NULL;
ImagingExposeDIB(display->dib, hdc);
Py_INCREF(Py_None);
return Py_None;
}
static PyObject*
_draw(ImagingDisplayObject* display, PyObject* args)
{
int hdc;
int dst[4];
int src[4];
if (!PyArg_ParseTuple(args, "i(iiii)(iiii)", &hdc,
dst+0, dst+1, dst+2, dst+3,
src+0, src+1, src+2, src+3))
return NULL;
ImagingDrawDIB(display->dib, hdc, dst, src);
Py_INCREF(Py_None);
return Py_None;
}
extern Imaging PyImaging_AsImaging(PyObject *op);
static PyObject*
_paste(ImagingDisplayObject* display, PyObject* args)
{
Imaging im;
PyObject* op;
int xy[4];
xy[0] = xy[1] = xy[2] = xy[3] = 0;
if (!PyArg_ParseTuple(args, "O|(iiii)", &op, xy+0, xy+1, xy+2, xy+3))
return NULL;
im = PyImaging_AsImaging(op);
if (!im)
return NULL;
if (xy[2] <= xy[0])
xy[2] = xy[0] + im->xsize;
if (xy[3] <= xy[1])
xy[3] = xy[1] + im->ysize;
ImagingPasteDIB(display->dib, im, xy);
Py_INCREF(Py_None);
return Py_None;
}
static PyObject*
_query_palette(ImagingDisplayObject* display, PyObject* args)
{
int hdc;
int status;
if (!PyArg_ParseTuple(args, "i", &hdc))
return NULL;
status = ImagingQueryPaletteDIB(display->dib, hdc);
return Py_BuildValue("i", status);
}
static PyObject*
_getdc(ImagingDisplayObject* display, PyObject* args)
{
int window;
HDC dc;
if (!PyArg_ParseTuple(args, "i", &window))
return NULL;
dc = GetDC((HWND) window);
if (!dc) {
PyErr_SetString(PyExc_IOError, "cannot create dc");
return NULL;
}
return Py_BuildValue("i", (int) dc);
}
static PyObject*
_releasedc(ImagingDisplayObject* display, PyObject* args)
{
int window, dc;
if (!PyArg_ParseTuple(args, "ii", &window, &dc))
return NULL;
ReleaseDC((HWND) window, (HDC) dc);
Py_INCREF(Py_None);
return Py_None;
}
static PyObject*
_frombytes(ImagingDisplayObject* display, PyObject* args)
{
char* ptr;
int bytes;
#if PY_VERSION_HEX >= 0x03000000
if (!PyArg_ParseTuple(args, "y#:frombytes", &ptr, &bytes))
return NULL;
#else
if (!PyArg_ParseTuple(args, "s#:fromstring", &ptr, &bytes))
return NULL;
#endif
if (display->dib->ysize * display->dib->linesize != bytes) {
PyErr_SetString(PyExc_ValueError, "wrong size");
return NULL;
}
memcpy(display->dib->bits, ptr, bytes);
Py_INCREF(Py_None);
return Py_None;
}
static PyObject*
_tobytes(ImagingDisplayObject* display, PyObject* args)
{
#if PY_VERSION_HEX >= 0x03000000
if (!PyArg_ParseTuple(args, ":tobytes"))
return NULL;
#else
if (!PyArg_ParseTuple(args, ":tostring"))
return NULL;
#endif
return PyBytes_FromStringAndSize(
display->dib->bits, display->dib->ysize * display->dib->linesize
);
}
static struct PyMethodDef methods[] = {
{"draw", (PyCFunction)_draw, 1},
{"expose", (PyCFunction)_expose, 1},
{"paste", (PyCFunction)_paste, 1},
{"query_palette", (PyCFunction)_query_palette, 1},
{"getdc", (PyCFunction)_getdc, 1},
{"releasedc", (PyCFunction)_releasedc, 1},
{"frombytes", (PyCFunction)_frombytes, 1},
{"tobytes", (PyCFunction)_tobytes, 1},
{"fromstring", (PyCFunction)_frombytes, 1},
{"tostring", (PyCFunction)_tobytes, 1},
{NULL, NULL} /* sentinel */
};
static PyObject*
_getattr_mode(ImagingDisplayObject* self, void* closure)
{
return Py_BuildValue("s", self->dib->mode);
}
static PyObject*
_getattr_size(ImagingDisplayObject* self, void* closure)
{
return Py_BuildValue("ii", self->dib->xsize, self->dib->ysize);
}
static struct PyGetSetDef getsetters[] = {
{ "mode", (getter) _getattr_mode },
{ "size", (getter) _getattr_size },
{ NULL }
};
static PyTypeObject ImagingDisplayType = {
PyVarObject_HEAD_INIT(NULL, 0)
"ImagingDisplay", /*tp_name*/
sizeof(ImagingDisplayObject), /*tp_size*/
0, /*tp_itemsize*/
/* methods */
(destructor)_delete, /*tp_dealloc*/
0, /*tp_print*/
0, /*tp_getattr*/
0, /*tp_setattr*/
0, /*tp_compare*/
0, /*tp_repr*/
0, /*tp_as_number */
0, /*tp_as_sequence */
0, /*tp_as_mapping */
0, /*tp_hash*/
0, /*tp_call*/
0, /*tp_str*/
0, /*tp_getattro*/
0, /*tp_setattro*/
0, /*tp_as_buffer*/
Py_TPFLAGS_DEFAULT, /*tp_flags*/
0, /*tp_doc*/
0, /*tp_traverse*/
0, /*tp_clear*/
0, /*tp_richcompare*/
0, /*tp_weaklistoffset*/
0, /*tp_iter*/
0, /*tp_iternext*/
methods, /*tp_methods*/
0, /*tp_members*/
getsetters, /*tp_getset*/
};
PyObject*
PyImaging_DisplayWin32(PyObject* self, PyObject* args)
{
ImagingDisplayObject* display;
char *mode;
int xsize, ysize;
if (!PyArg_ParseTuple(args, "s(ii)", &mode, &xsize, &ysize))
return NULL;
display = _new(mode, xsize, ysize);
if (display == NULL)
return NULL;
return (PyObject*) display;
}
PyObject*
PyImaging_DisplayModeWin32(PyObject* self, PyObject* args)
{
char *mode;
int size[2];
mode = ImagingGetModeDIB(size);
return Py_BuildValue("s(ii)", mode, size[0], size[1]);
}
/* -------------------------------------------------------------------- */
/* Windows screen grabber */
PyObject*
PyImaging_GrabScreenWin32(PyObject* self, PyObject* args)
{
int width, height;
HBITMAP bitmap;
BITMAPCOREHEADER core;
HDC screen, screen_copy;
PyObject* buffer;
/* step 1: create a memory DC large enough to hold the
entire screen */
screen = CreateDC("DISPLAY", NULL, NULL, NULL);
screen_copy = CreateCompatibleDC(screen);
width = GetDeviceCaps(screen, HORZRES);
height = GetDeviceCaps(screen, VERTRES);
bitmap = CreateCompatibleBitmap(screen, width, height);
if (!bitmap)
goto error;
if (!SelectObject(screen_copy, bitmap))
goto error;
/* step 2: copy bits into memory DC bitmap */
if (!BitBlt(screen_copy, 0, 0, width, height, screen, 0, 0, SRCCOPY))
goto error;
/* step 3: extract bits from bitmap */
buffer = PyBytes_FromStringAndSize(NULL, height * ((width*3 + 3) & -4));
if (!buffer)
return NULL;
core.bcSize = sizeof(core);
core.bcWidth = width;
core.bcHeight = height;
core.bcPlanes = 1;
core.bcBitCount = 24;
if (!GetDIBits(screen_copy, bitmap, 0, height, PyBytes_AS_STRING(buffer),
(BITMAPINFO*) &core, DIB_RGB_COLORS))
goto error;
DeleteObject(bitmap);
DeleteDC(screen_copy);
DeleteDC(screen);
return Py_BuildValue("(ii)N", width, height, buffer);
error:
PyErr_SetString(PyExc_IOError, "screen grab failed");
DeleteDC(screen_copy);
DeleteDC(screen);
return NULL;
}
static BOOL CALLBACK list_windows_callback(HWND hwnd, LPARAM lParam)
{
PyObject* window_list = (PyObject*) lParam;
PyObject* item;
PyObject* title;
RECT inner, outer;
int title_size;
int status;
/* get window title */
title_size = GetWindowTextLength(hwnd);
if (title_size > 0) {
title = PyUnicode_FromStringAndSize(NULL, title_size);
if (title)
GetWindowText(hwnd, PyUnicode_AS_UNICODE(title), title_size+1);
} else
title = PyUnicode_FromString("");
if (!title)
return 0;
/* get bounding boxes */
GetClientRect(hwnd, &inner);
GetWindowRect(hwnd, &outer);
item = Py_BuildValue(
"nN(iiii)(iiii)", (Py_ssize_t) hwnd, title,
inner.left, inner.top, inner.right, inner.bottom,
outer.left, outer.top, outer.right, outer.bottom
);
if (!item)
return 0;
status = PyList_Append(window_list, item);
Py_DECREF(item);
if (status < 0)
return 0;
return 1;
}
PyObject*
PyImaging_ListWindowsWin32(PyObject* self, PyObject* args)
{
PyObject* window_list;
window_list = PyList_New(0);
if (!window_list)
return NULL;
EnumWindows(list_windows_callback, (LPARAM) window_list);
if (PyErr_Occurred()) {
Py_DECREF(window_list);
return NULL;
}
return window_list;
}
/* -------------------------------------------------------------------- */
/* Windows clipboard grabber */
PyObject*
PyImaging_GrabClipboardWin32(PyObject* self, PyObject* args)
{
int clip;
HANDLE handle;
int size;
void* data;
PyObject* result;
int verbose = 0; /* debugging; will be removed in future versions */
if (!PyArg_ParseTuple(args, "|i", &verbose))
return NULL;
clip = OpenClipboard(NULL);
/* FIXME: check error status */
if (verbose) {
UINT format = EnumClipboardFormats(0);
char buffer[200];
char* result;
while (format != 0) {
if (GetClipboardFormatName(format, buffer, sizeof buffer) > 0)
result = buffer;
else
switch (format) {
case CF_BITMAP:
result = "CF_BITMAP";
break;
case CF_DIB:
result = "CF_DIB";
break;
case CF_DIF:
result = "CF_DIF";
break;
case CF_ENHMETAFILE:
result = "CF_ENHMETAFILE";
break;
case CF_HDROP:
result = "CF_HDROP";
break;
case CF_LOCALE:
result = "CF_LOCALE";
break;
case CF_METAFILEPICT:
result = "CF_METAFILEPICT";
break;
case CF_OEMTEXT:
result = "CF_OEMTEXT";
break;
case CF_OWNERDISPLAY:
result = "CF_OWNERDISPLAY";
break;
case CF_PALETTE:
result = "CF_PALETTE";
break;
case CF_PENDATA:
result = "CF_PENDATA";
break;
case CF_RIFF:
result = "CF_RIFF";
break;
case CF_SYLK:
result = "CF_SYLK";
break;
case CF_TEXT:
result = "CF_TEXT";
break;
case CF_WAVE:
result = "CF_WAVE";
break;
case CF_TIFF:
result = "CF_TIFF";
break;
case CF_UNICODETEXT:
result = "CF_UNICODETEXT";
break;
default:
sprintf(buffer, "[%d]", format);
result = buffer;
break;
}
printf("%s (%d)\n", result, format);
format = EnumClipboardFormats(format);
}
}
handle = GetClipboardData(CF_DIB);
if (!handle) {
/* FIXME: add CF_HDROP support to allow cut-and-paste from
the explorer */
CloseClipboard();
Py_INCREF(Py_None);
return Py_None;
}
size = GlobalSize(handle);
data = GlobalLock(handle);
#if 0
/* calculate proper size for string formats */
if (format == CF_TEXT || format == CF_OEMTEXT)
size = strlen(data);
else if (format == CF_UNICODETEXT)
size = wcslen(data) * 2;
#endif
result = PyBytes_FromStringAndSize(data, size);
GlobalUnlock(handle);
CloseClipboard();
return result;
}
/* -------------------------------------------------------------------- */
/* Windows class */
#ifndef WM_MOUSEWHEEL
#define WM_MOUSEWHEEL 522
#endif
static int mainloop = 0;
static void
callback_error(const char* handler)
{
PyObject* sys_stderr;
sys_stderr = PySys_GetObject("stderr");
if (sys_stderr) {
PyFile_WriteString("*** ImageWin: error in ", sys_stderr);
PyFile_WriteString((char*) handler, sys_stderr);
PyFile_WriteString(":\n", sys_stderr);
}
PyErr_Print();
PyErr_Clear();
}
static LRESULT CALLBACK
windowCallback(HWND wnd, UINT message, WPARAM wParam, LPARAM lParam)
{
PAINTSTRUCT ps;
PyObject* callback = NULL;
PyObject* result;
PyThreadState* threadstate;
PyThreadState* current_threadstate;
HDC dc;
RECT rect;
LRESULT status = 0;
/* set up threadstate for messages that calls back into python */
switch (message) {
case WM_CREATE:
mainloop++;
break;
case WM_DESTROY:
mainloop--;
/* fall through... */
case WM_PAINT:
case WM_SIZE:
callback = (PyObject*) GetWindowLong(wnd, 0);
if (callback) {
threadstate = (PyThreadState*)
GetWindowLong(wnd, sizeof(PyObject*));
current_threadstate = PyThreadState_Swap(NULL);
PyEval_RestoreThread(threadstate);
} else
return DefWindowProc(wnd, message, wParam, lParam);
}
/* process message */
switch (message) {
case WM_PAINT:
/* redraw (part of) window. this generates a WCK-style
damage/clear/repair cascade */
BeginPaint(wnd, &ps);
dc = GetDC(wnd);
GetWindowRect(wnd, &rect); /* in screen coordinates */
result = PyObject_CallFunction(
callback, "siiii", "damage",
ps.rcPaint.left, ps.rcPaint.top,
ps.rcPaint.right, ps.rcPaint.bottom
);
if (result)
Py_DECREF(result);
else
callback_error("window damage callback");
result = PyObject_CallFunction(
callback, "siiiii", "clear", (int) dc,
0, 0, rect.right-rect.left, rect.bottom-rect.top
);
if (result)
Py_DECREF(result);
else
callback_error("window clear callback");
result = PyObject_CallFunction(
callback, "siiiii", "repair", (int) dc,
0, 0, rect.right-rect.left, rect.bottom-rect.top
);
if (result)
Py_DECREF(result);
else
callback_error("window repair callback");
ReleaseDC(wnd, dc);
EndPaint(wnd, &ps);
break;
case WM_SIZE:
/* resize window */
result = PyObject_CallFunction(
callback, "sii", "resize", LOWORD(lParam), HIWORD(lParam)
);
if (result) {
InvalidateRect(wnd, NULL, 1);
Py_DECREF(result);
} else
callback_error("window resize callback");
break;
case WM_DESTROY:
/* destroy window */
result = PyObject_CallFunction(callback, "s", "destroy");
if (result)
Py_DECREF(result);
else
callback_error("window destroy callback");
Py_DECREF(callback);
break;
default:
status = DefWindowProc(wnd, message, wParam, lParam);
}
if (callback) {
/* restore thread state */
PyEval_SaveThread();
PyThreadState_Swap(threadstate);
}
return status;
}
PyObject*
PyImaging_CreateWindowWin32(PyObject* self, PyObject* args)
{
HWND wnd;
WNDCLASS windowClass;
char* title;
PyObject* callback;
int width = 0, height = 0;
if (!PyArg_ParseTuple(args, "sO|ii", &title, &callback, &width, &height))
return NULL;
if (width <= 0)
width = CW_USEDEFAULT;
if (height <= 0)
height = CW_USEDEFAULT;
/* register toplevel window class */
windowClass.style = CS_CLASSDC;
windowClass.cbClsExtra = 0;
windowClass.cbWndExtra = sizeof(PyObject*) + sizeof(PyThreadState*);
windowClass.hInstance = GetModuleHandle(NULL);
/* windowClass.hbrBackground = (HBRUSH) (COLOR_BTNFACE + 1); */
windowClass.hbrBackground = NULL;
windowClass.lpszMenuName = NULL;
windowClass.lpszClassName = "pilWindow";
windowClass.lpfnWndProc = windowCallback;
windowClass.hIcon = LoadIcon(GetModuleHandle(NULL), MAKEINTRESOURCE(1));
windowClass.hCursor = LoadCursor(NULL, IDC_ARROW); /* CROSS? */
RegisterClass(&windowClass); /* FIXME: check return status */
wnd = CreateWindowEx(
0, windowClass.lpszClassName, title,
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, width, height,
HWND_DESKTOP, NULL, NULL, NULL
);
if (!wnd) {
PyErr_SetString(PyExc_IOError, "failed to create window");
return NULL;
}
/* register window callback */
Py_INCREF(callback);
SetWindowLongPtr(wnd, 0, (LONG_PTR) callback);
SetWindowLongPtr(wnd, sizeof(callback), (LONG_PTR) PyThreadState_Get());
Py_BEGIN_ALLOW_THREADS
ShowWindow(wnd, SW_SHOWNORMAL);
SetForegroundWindow(wnd); /* to make sure it's visible */
Py_END_ALLOW_THREADS
return Py_BuildValue("n", (Py_ssize_t) wnd);
}
PyObject*
PyImaging_EventLoopWin32(PyObject* self, PyObject* args)
{
MSG msg;
Py_BEGIN_ALLOW_THREADS
while (mainloop && GetMessage(&msg, NULL, 0, 0)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
Py_END_ALLOW_THREADS
Py_INCREF(Py_None);
return Py_None;
}
/* -------------------------------------------------------------------- */
/* windows WMF renderer */
#define GET32(p,o) ((DWORD*)(p+o))[0]
PyObject *
PyImaging_DrawWmf(PyObject* self, PyObject* args)
{
HBITMAP bitmap;
HENHMETAFILE meta;
BITMAPCOREHEADER core;
HDC dc;
RECT rect;
PyObject* buffer = NULL;
char* ptr;
char* data;
int datasize;
int width, height;
int x0, y0, x1, y1;
if (!PyArg_ParseTuple(args, PY_ARG_BYTES_LENGTH"(ii)(iiii):_load", &data, &datasize,
&width, &height, &x0, &x1, &y0, &y1))
return NULL;
/* step 1: copy metafile contents into METAFILE object */
if (datasize > 22 && GET32(data, 0) == 0x9ac6cdd7) {
/* placeable windows metafile (22-byte aldus header) */
meta = SetWinMetaFileBits(datasize-22, data+22, NULL, NULL);
} else if (datasize > 80 && GET32(data, 0) == 1 &&
GET32(data, 40) == 0x464d4520) {
/* enhanced metafile */
meta = SetEnhMetaFileBits(datasize, data);
} else {
/* unknown meta format */
meta = NULL;
}
if (!meta) {
PyErr_SetString(PyExc_IOError, "cannot load metafile");
return NULL;
}
/* step 2: create bitmap */
core.bcSize = sizeof(core);
core.bcWidth = width;
core.bcHeight = height;
core.bcPlanes = 1;
core.bcBitCount = 24;
dc = CreateCompatibleDC(NULL);
bitmap = CreateDIBSection(
dc, (BITMAPINFO*) &core, DIB_RGB_COLORS, &ptr, NULL, 0
);
if (!bitmap) {
PyErr_SetString(PyExc_IOError, "cannot create bitmap");
goto error;
}
if (!SelectObject(dc, bitmap)) {
PyErr_SetString(PyExc_IOError, "cannot select bitmap");
goto error;
}
/* step 3: render metafile into bitmap */
rect.left = rect.top = 0;
rect.right = width;
rect.bottom = height;
/* FIXME: make background transparent? configurable? */
FillRect(dc, &rect, GetStockObject(WHITE_BRUSH));
if (!PlayEnhMetaFile(dc, meta, &rect)) {
PyErr_SetString(PyExc_IOError, "cannot render metafile");
goto error;
}
/* step 4: extract bits from bitmap */
GdiFlush();
buffer = PyBytes_FromStringAndSize(ptr, height * ((width*3 + 3) & -4));
error:
DeleteEnhMetaFile(meta);
if (bitmap)
DeleteObject(bitmap);
DeleteDC(dc);
return buffer;
}
#endif /* _WIN32 */
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