reactos/dll/win32/gdiplus/gdiplus.c
Amine Khaldi 3a088d8ec6 * Sync up to trunk HEAD (r62975).
svn path=/branches/shell-experiments/; revision=62976
2014-04-26 11:31:20 +00:00

470 lines
13 KiB
C

/*
* Copyright (C) 2007 Google (Evan Stade)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "gdiplus_private.h"
static const REAL mm_per_inch = 25.4;
static const REAL point_per_inch = 72.0;
static Status WINAPI NotificationHook(ULONG_PTR *token)
{
TRACE("%p\n", token);
if(!token)
return InvalidParameter;
return Ok;
}
static void WINAPI NotificationUnhook(ULONG_PTR token)
{
TRACE("%ld\n", token);
}
/*****************************************************
* DllMain
*/
BOOL WINAPI DllMain(HINSTANCE hinst, DWORD reason, LPVOID reserved)
{
TRACE("(%p, %d, %p)\n", hinst, reason, reserved);
switch(reason)
{
case DLL_PROCESS_ATTACH:
DisableThreadLibraryCalls( hinst );
break;
case DLL_PROCESS_DETACH:
if (reserved) break;
free_installed_fonts();
break;
}
return TRUE;
}
/*****************************************************
* GdiplusStartup [GDIPLUS.@]
*/
Status WINAPI GdiplusStartup(ULONG_PTR *token, const struct GdiplusStartupInput *input,
struct GdiplusStartupOutput *output)
{
if(!token || !input)
return InvalidParameter;
TRACE("%p %p %p\n", token, input, output);
TRACE("GdiplusStartupInput %d %p %d %d\n", input->GdiplusVersion,
input->DebugEventCallback, input->SuppressBackgroundThread,
input->SuppressExternalCodecs);
if(input->GdiplusVersion < 1 || input->GdiplusVersion > 2)
return UnsupportedGdiplusVersion;
if(input->SuppressBackgroundThread){
if(!output)
return InvalidParameter;
output->NotificationHook = NotificationHook;
output->NotificationUnhook = NotificationUnhook;
}
*token = 0xdeadbeef;
/* FIXME: DebugEventCallback ignored */
return Ok;
}
GpStatus WINAPI GdiplusNotificationHook(ULONG_PTR *token)
{
FIXME("%p\n", token);
return NotificationHook(token);
}
void WINAPI GdiplusNotificationUnhook(ULONG_PTR token)
{
FIXME("%ld\n", token);
NotificationUnhook(token);
}
/*****************************************************
* GdiplusShutdown [GDIPLUS.@]
*/
ULONG WINAPI GdiplusShutdown_wrapper(ULONG_PTR token)
{
/* Notice the slightly different prototype from the official
* signature which forces us to use the _wrapper suffix.
*/
/* FIXME: no object tracking */
/* "bricksntiles" expects a return value of 0, which native
* coincidentally gives.
*/
return 0;
}
/*****************************************************
* GdipAlloc [GDIPLUS.@]
*/
void* WINGDIPAPI GdipAlloc(SIZE_T size)
{
return HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size);
}
/*****************************************************
* GdipFree [GDIPLUS.@]
*/
void WINGDIPAPI GdipFree(void* ptr)
{
HeapFree(GetProcessHeap(), 0, ptr);
}
/* Calculates the bezier points needed to fill in the arc portion starting at
* angle start and ending at end. These two angles should be no more than 90
* degrees from each other. x1, y1, x2, y2 describes the bounding box (upper
* left and width and height). Angles must be in radians. write_first indicates
* that the first bezier point should be written out (usually this is false).
* pt is the array of GpPointFs that gets written to.
**/
static void add_arc_part(GpPointF * pt, REAL x1, REAL y1, REAL x2, REAL y2,
REAL start, REAL end, BOOL write_first)
{
REAL center_x, center_y, rad_x, rad_y, cos_start, cos_end,
sin_start, sin_end, a, half;
INT i;
rad_x = x2 / 2.0;
rad_y = y2 / 2.0;
center_x = x1 + rad_x;
center_y = y1 + rad_y;
cos_start = cos(start);
cos_end = cos(end);
sin_start = sin(start);
sin_end = sin(end);
half = (end - start) / 2.0;
a = 4.0 / 3.0 * (1 - cos(half)) / sin(half);
if(write_first){
pt[0].X = cos_start;
pt[0].Y = sin_start;
}
pt[1].X = cos_start - a * sin_start;
pt[1].Y = sin_start + a * cos_start;
pt[3].X = cos_end;
pt[3].Y = sin_end;
pt[2].X = cos_end + a * sin_end;
pt[2].Y = sin_end - a * cos_end;
/* expand the points back from the unit circle to the ellipse */
for(i = (write_first ? 0 : 1); i < 4; i ++){
pt[i].X = pt[i].X * rad_x + center_x;
pt[i].Y = pt[i].Y * rad_y + center_y;
}
}
/* We plot the curve as if it is on a circle then stretch the points. This
* adjusts the angles so that when we stretch the points they will end in the
* right place. This is only complicated because atan and atan2 do not behave
* conveniently. */
static void unstretch_angle(REAL * angle, REAL rad_x, REAL rad_y)
{
REAL stretched;
INT revs_off;
*angle = deg2rad(*angle);
if(fabs(cos(*angle)) < 0.00001 || fabs(sin(*angle)) < 0.00001)
return;
stretched = gdiplus_atan2(sin(*angle) / fabs(rad_y), cos(*angle) / fabs(rad_x));
revs_off = gdip_round(*angle / (2.0 * M_PI)) - gdip_round(stretched / (2.0 * M_PI));
stretched += ((REAL)revs_off) * M_PI * 2.0;
*angle = stretched;
}
/* Stores the bezier points that correspond to the arc in points. If points is
* null, just return the number of points needed to represent the arc. */
INT arc2polybezier(GpPointF * points, REAL x1, REAL y1, REAL x2, REAL y2,
REAL startAngle, REAL sweepAngle)
{
INT i;
REAL end_angle, start_angle, endAngle;
endAngle = startAngle + sweepAngle;
unstretch_angle(&startAngle, x2 / 2.0, y2 / 2.0);
unstretch_angle(&endAngle, x2 / 2.0, y2 / 2.0);
/* start_angle and end_angle are the iterative variables */
start_angle = startAngle;
for(i = 0; i < MAX_ARC_PTS - 1; i += 3){
/* check if we've overshot the end angle */
if( sweepAngle > 0.0 )
{
if (start_angle >= endAngle) break;
end_angle = min(start_angle + M_PI_2, endAngle);
}
else
{
if (start_angle <= endAngle) break;
end_angle = max(start_angle - M_PI_2, endAngle);
}
if (points)
add_arc_part(&points[i], x1, y1, x2, y2, start_angle, end_angle, i == 0);
start_angle += M_PI_2 * (sweepAngle < 0.0 ? -1.0 : 1.0);
}
if (i == 0) return 0;
else return i+1;
}
COLORREF ARGB2COLORREF(ARGB color)
{
/*
Packing of these color structures:
COLORREF: 00bbggrr
ARGB: aarrggbb
FIXME:doesn't handle alpha channel
*/
return ((color & 0x0000ff) << 16) +
(color & 0x00ff00) +
((color & 0xff0000) >> 16);
}
HBITMAP ARGB2BMP(ARGB color)
{
BITMAPINFO bi;
HBITMAP result;
RGBQUAD *bits;
int alpha;
if ((color & 0xff000000) == 0xff000000) return 0;
bi.bmiHeader.biSize = sizeof(bi.bmiHeader);
bi.bmiHeader.biWidth = 1;
bi.bmiHeader.biHeight = 1;
bi.bmiHeader.biPlanes = 1;
bi.bmiHeader.biBitCount = 32;
bi.bmiHeader.biCompression = BI_RGB;
bi.bmiHeader.biSizeImage = 0;
bi.bmiHeader.biXPelsPerMeter = 0;
bi.bmiHeader.biYPelsPerMeter = 0;
bi.bmiHeader.biClrUsed = 0;
bi.bmiHeader.biClrImportant = 0;
result = CreateDIBSection(0, &bi, DIB_RGB_COLORS, (void*)&bits, NULL, 0);
bits[0].rgbReserved = alpha = (color>>24)&0xff;
bits[0].rgbRed = ((color>>16)&0xff)*alpha/255;
bits[0].rgbGreen = ((color>>8)&0xff)*alpha/255;
bits[0].rgbBlue = (color&0xff)*alpha/255;
return result;
}
/* Like atan2, but puts angle in correct quadrant if dx is 0. */
REAL gdiplus_atan2(REAL dy, REAL dx)
{
if((dx == 0.0) && (dy != 0.0))
return dy > 0.0 ? M_PI_2 : -M_PI_2;
return atan2(dy, dx);
}
GpStatus hresult_to_status(HRESULT res)
{
switch(res){
case S_OK:
return Ok;
case E_OUTOFMEMORY:
return OutOfMemory;
case E_INVALIDARG:
return InvalidParameter;
default:
return GenericError;
}
}
/* converts a given unit to its value in pixels */
REAL units_to_pixels(REAL units, GpUnit unit, REAL dpi)
{
switch (unit)
{
case UnitPixel:
case UnitWorld:
case UnitDisplay:
return units;
case UnitPoint:
return units * dpi / point_per_inch;
case UnitInch:
return units * dpi;
case UnitDocument:
return units * dpi / 300.0; /* Per MSDN */
case UnitMillimeter:
return units * dpi / mm_per_inch;
default:
FIXME("Unhandled unit type: %d\n", unit);
return 0;
}
}
/* converts value in pixels to a given unit */
REAL pixels_to_units(REAL pixels, GpUnit unit, REAL dpi)
{
switch (unit)
{
case UnitPixel:
case UnitWorld:
case UnitDisplay:
return pixels;
case UnitPoint:
return pixels * point_per_inch / dpi;
case UnitInch:
return pixels / dpi;
case UnitDocument:
return pixels * 300.0 / dpi;
case UnitMillimeter:
return pixels * mm_per_inch / dpi;
default:
FIXME("Unhandled unit type: %d\n", unit);
return 0;
}
}
REAL units_scale(GpUnit from, GpUnit to, REAL dpi)
{
REAL pixels = units_to_pixels(1.0, from, dpi);
return pixels_to_units(pixels, to, dpi);
}
/* Calculates Bezier points from cardinal spline points. */
void calc_curve_bezier(const GpPointF *pts, REAL tension, REAL *x1,
REAL *y1, REAL *x2, REAL *y2)
{
REAL xdiff, ydiff;
/* calculate tangent */
xdiff = pts[2].X - pts[0].X;
ydiff = pts[2].Y - pts[0].Y;
/* apply tangent to get control points */
*x1 = pts[1].X - tension * xdiff;
*y1 = pts[1].Y - tension * ydiff;
*x2 = pts[1].X + tension * xdiff;
*y2 = pts[1].Y + tension * ydiff;
}
/* Calculates Bezier points from cardinal spline endpoints. */
void calc_curve_bezier_endp(REAL xend, REAL yend, REAL xadj, REAL yadj,
REAL tension, REAL *x, REAL *y)
{
/* tangent at endpoints is the line from the endpoint to the adjacent point */
*x = gdip_round(tension * (xadj - xend) + xend);
*y = gdip_round(tension * (yadj - yend) + yend);
}
/* make sure path has enough space for len more points */
BOOL lengthen_path(GpPath *path, INT len)
{
/* initial allocation */
if(path->datalen == 0){
path->datalen = len * 2;
path->pathdata.Points = GdipAlloc(path->datalen * sizeof(PointF));
if(!path->pathdata.Points) return FALSE;
path->pathdata.Types = GdipAlloc(path->datalen);
if(!path->pathdata.Types){
GdipFree(path->pathdata.Points);
return FALSE;
}
}
/* reallocation, double size of arrays */
else if(path->datalen - path->pathdata.Count < len){
while(path->datalen - path->pathdata.Count < len)
path->datalen *= 2;
path->pathdata.Points = HeapReAlloc(GetProcessHeap(), 0,
path->pathdata.Points, path->datalen * sizeof(PointF));
if(!path->pathdata.Points) return FALSE;
path->pathdata.Types = HeapReAlloc(GetProcessHeap(), 0,
path->pathdata.Types, path->datalen);
if(!path->pathdata.Types) return FALSE;
}
return TRUE;
}
void convert_32bppARGB_to_32bppPARGB(UINT width, UINT height,
BYTE *dst_bits, INT dst_stride, const BYTE *src_bits, INT src_stride)
{
INT x, y;
for (y=0; y<height; y++)
{
const BYTE *src=src_bits+y*src_stride;
BYTE *dst=dst_bits+y*dst_stride;
for (x=0; x<width; x++)
{
BYTE alpha=src[3];
*dst++ = (*src++ * alpha + 127) / 255;
*dst++ = (*src++ * alpha + 127) / 255;
*dst++ = (*src++ * alpha + 127) / 255;
*dst++ = *src++;
}
}
}
/* recursive deletion of GpRegion nodes */
void delete_element(region_element* element)
{
switch(element->type)
{
case RegionDataRect:
break;
case RegionDataPath:
GdipDeletePath(element->elementdata.path);
break;
case RegionDataEmptyRect:
case RegionDataInfiniteRect:
break;
default:
delete_element(element->elementdata.combine.left);
delete_element(element->elementdata.combine.right);
GdipFree(element->elementdata.combine.left);
GdipFree(element->elementdata.combine.right);
break;
}
}
const char *debugstr_rectf(const RectF* rc)
{
if (!rc) return "(null)";
return wine_dbg_sprintf("(%0.2f,%0.2f,%0.2f,%0.2f)", rc->X, rc->Y, rc->Width, rc->Height);
}
const char *debugstr_pointf(const PointF* pt)
{
if (!pt) return "(null)";
return wine_dbg_sprintf("(%0.2f,%0.2f)", pt->X, pt->Y);
}