mirror of
https://github.com/reactos/wine.git
synced 2024-12-07 11:28:51 +00:00
288 lines
7.9 KiB
C
288 lines
7.9 KiB
C
/*
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* Copyright (C) 2007 Google (Evan Stade)
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <stdarg.h>
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#include <math.h>
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#include "windef.h"
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#include "winbase.h"
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#include "winerror.h"
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#include "wine/debug.h"
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#include "wingdi.h"
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#include "objbase.h"
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#include "winreg.h"
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#include "shlwapi.h"
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#include "gdiplus.h"
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#include "gdiplus_private.h"
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WINE_DEFAULT_DEBUG_CHANNEL(gdiplus);
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static Status WINAPI NotificationHook(ULONG_PTR *token)
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{
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TRACE("%p\n", token);
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if(!token)
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return InvalidParameter;
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return Ok;
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}
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static void WINAPI NotificationUnhook(ULONG_PTR token)
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{
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TRACE("%ld\n", token);
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}
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/*****************************************************
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* DllMain
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*/
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BOOL WINAPI DllMain(HINSTANCE hinst, DWORD reason, LPVOID reserved)
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{
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TRACE("(%p, %d, %p)\n", hinst, reason, reserved);
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switch(reason)
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{
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case DLL_WINE_PREATTACH:
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return FALSE; /* prefer native version */
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case DLL_PROCESS_ATTACH:
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DisableThreadLibraryCalls( hinst );
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break;
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}
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return TRUE;
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}
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/*****************************************************
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* GdiplusStartup [GDIPLUS.@]
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*/
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Status WINAPI GdiplusStartup(ULONG_PTR *token, const struct GdiplusStartupInput *input,
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struct GdiplusStartupOutput *output)
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{
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if(!token || !input)
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return InvalidParameter;
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TRACE("%p %p %p\n", token, input, output);
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TRACE("GdiplusStartupInput %d %p %d %d\n", input->GdiplusVersion,
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input->DebugEventCallback, input->SuppressBackgroundThread,
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input->SuppressExternalCodecs);
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if(input->GdiplusVersion != 1)
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return UnsupportedGdiplusVersion;
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if(input->SuppressBackgroundThread){
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if(!output)
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return InvalidParameter;
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output->NotificationHook = NotificationHook;
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output->NotificationUnhook = NotificationUnhook;
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}
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/* FIXME: DebugEventCallback ignored */
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return Ok;
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}
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/*****************************************************
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* GdiplusShutdown [GDIPLUS.@]
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*/
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void WINAPI GdiplusShutdown(ULONG_PTR token)
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{
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/* FIXME: no object tracking */
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}
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/*****************************************************
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* GdipAlloc [GDIPLUS.@]
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*/
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void* WINGDIPAPI GdipAlloc(SIZE_T size)
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{
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return HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size);
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}
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/*****************************************************
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* GdipFree [GDIPLUS.@]
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*/
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void WINGDIPAPI GdipFree(void* ptr)
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{
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HeapFree(GetProcessHeap(), 0, ptr);
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}
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/* Calculates the bezier points needed to fill in the arc portion starting at
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* angle start and ending at end. These two angles should be no more than 90
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* degrees from each other. x1, y1, x2, y2 describes the bounding box (upper
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* left and width and height). Angles must be in radians. write_first indicates
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* that the first bezier point should be written out (usually this is false).
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* pt is the array of GpPointFs that gets written to.
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**/
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static void add_arc_part(GpPointF * pt, REAL x1, REAL y1, REAL x2, REAL y2,
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REAL start, REAL end, BOOL write_first)
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{
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REAL center_x, center_y, rad_x, rad_y, cos_start, cos_end,
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sin_start, sin_end, a, half;
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INT i;
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rad_x = x2 / 2.0;
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rad_y = y2 / 2.0;
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center_x = x1 + rad_x;
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center_y = y1 + rad_y;
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cos_start = cos(start);
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cos_end = cos(end);
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sin_start = sin(start);
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sin_end = sin(end);
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half = (end - start) / 2.0;
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a = 4.0 / 3.0 * (1 - cos(half)) / sin(half);
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if(write_first){
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pt[0].X = cos_start;
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pt[0].Y = sin_start;
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}
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pt[1].X = cos_start - a * sin_start;
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pt[1].Y = sin_start + a * cos_start;
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pt[3].X = cos_end;
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pt[3].Y = sin_end;
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pt[2].X = cos_end + a * sin_end;
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pt[2].Y = sin_end - a * cos_end;
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/* expand the points back from the unit circle to the ellipse */
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for(i = (write_first ? 0 : 1); i < 4; i ++){
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pt[i].X = pt[i].X * rad_x + center_x;
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pt[i].Y = pt[i].Y * rad_y + center_y;
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}
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}
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/* We plot the curve as if it is on a circle then stretch the points. This
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* adjusts the angles so that when we stretch the points they will end in the
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* right place. This is only complicated because atan and atan2 do not behave
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* conveniently. */
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static void unstretch_angle(REAL * angle, REAL rad_x, REAL rad_y)
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{
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REAL stretched;
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INT revs_off;
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*angle = deg2rad(*angle);
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if(fabs(cos(*angle)) < 0.00001 || fabs(sin(*angle)) < 0.00001)
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return;
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stretched = gdiplus_atan2(sin(*angle) / fabs(rad_y), cos(*angle) / fabs(rad_x));
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revs_off = roundr(*angle / (2.0 * M_PI)) - roundr(stretched / (2.0 * M_PI));
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stretched += ((REAL)revs_off) * M_PI * 2.0;
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*angle = stretched;
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}
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/* Stores the bezier points that correspond to the arc in points. If points is
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* null, just return the number of points needed to represent the arc. */
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INT arc2polybezier(GpPointF * points, REAL x1, REAL y1, REAL x2, REAL y2,
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REAL startAngle, REAL sweepAngle)
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{
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INT i, count;
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REAL end_angle, start_angle, endAngle;
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endAngle = startAngle + sweepAngle;
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unstretch_angle(&startAngle, x2 / 2.0, y2 / 2.0);
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unstretch_angle(&endAngle, x2 / 2.0, y2 / 2.0);
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count = ceilf(fabs(endAngle - startAngle) / M_PI_2) * 3 + 1;
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/* don't make more than a full circle */
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count = min(MAX_ARC_PTS, count);
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if(count == 1)
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return 0;
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if(!points)
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return count;
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/* start_angle and end_angle are the iterative variables */
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start_angle = startAngle;
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for(i = 0; i < count - 1; i += 3){
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/* check if we've overshot the end angle */
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if( sweepAngle > 0.0 )
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end_angle = min(start_angle + M_PI_2, endAngle);
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else
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end_angle = max(start_angle - M_PI_2, endAngle);
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add_arc_part(&points[i], x1, y1, x2, y2, start_angle, end_angle, i == 0);
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start_angle += M_PI_2 * (sweepAngle < 0.0 ? -1.0 : 1.0);
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}
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return count;
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}
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COLORREF ARGB2COLORREF(ARGB color)
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{
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/*
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Packing of these color structures:
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COLORREF: 00bbggrr
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ARGB: aarrggbb
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FIXME:doesn't handle alpha channel
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*/
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return ((color & 0x0000ff) << 16) +
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(color & 0x00ff00) +
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((color & 0xff0000) >> 16);
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}
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/* Like atan2, but puts angle in correct quadrant if dx is 0. */
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REAL gdiplus_atan2(REAL dy, REAL dx)
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{
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if((dx == 0.0) && (dy != 0.0))
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return dy > 0.0 ? M_PI_2 : -M_PI_2;
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return atan2(dy, dx);
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}
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GpStatus hresult_to_status(HRESULT res)
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{
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switch(res){
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case S_OK:
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return Ok;
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case E_OUTOFMEMORY:
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return OutOfMemory;
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case E_INVALIDARG:
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return InvalidParameter;
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default:
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return GenericError;
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}
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}
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/* converts a given unit to its value in pixels */
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REAL convert_unit(HDC hdc, GpUnit unit)
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{
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switch(unit)
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{
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case UnitInch:
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return (REAL) GetDeviceCaps(hdc, LOGPIXELSX);
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case UnitPoint:
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return ((REAL)GetDeviceCaps(hdc, LOGPIXELSX)) / 72.0;
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case UnitDocument:
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return ((REAL)GetDeviceCaps(hdc, LOGPIXELSX)) / 300.0;
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case UnitMillimeter:
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return ((REAL)GetDeviceCaps(hdc, LOGPIXELSX)) / 25.4;
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case UnitWorld:
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ERR("cannot convert UnitWorld\n");
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return 0.0;
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case UnitPixel:
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case UnitDisplay:
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default:
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return 1.0;
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}
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}
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