Magic-Mirror/gecko-dev
1
0
Fork 0
mirror of https://github.com/mozilla/gecko-dev.git synced 2025-01-01 05:43:46 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

b=383512, make (win32) gfx support text drawing onto any surface type, r/a=stuart

Browse Source
This commit is contained in:
vladimir@pobox.com 2007-08-07 15:46:42 -07:00
parent 919f70dc84
commit 58a4456f21
1 changed files with 42 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

71
gfx/thebes/src/gfxWindowsFonts.cpp
View File

@ -77,15 +77,31 @@ static PRLogModuleInfo *gFontLog = PR_NewLogModule("winfonts");
#define ROUND(x) floor((x) + 0.5)
inline HDC
GetDCFromSurface(gfxASurface *aSurface)
{
if (aSurface->GetType() != gfxASurface::SurfaceTypeWin32) {
NS_ERROR("GetDCFromSurface: Context target is not win32!");
return nsnull;
struct DCFromContext {
DCFromContext(gfxContext *aContext) {
nsRefPtr<gfxASurface> aSurface = aContext->CurrentSurface();
if (aSurface->GetType() == gfxASurface::SurfaceTypeWin32) {
dc = static_cast<gfxWindowsSurface*>(aSurface.get())->GetDC();
needsRelease = PR_FALSE;
} else {
dc = GetDC(NULL);
needsRelease = PR_TRUE;
}
}
return static_cast<gfxWindowsSurface*>(aSurface)->GetDC();
}
~DCFromContext() {
if (needsRelease)
ReleaseDC(NULL, dc);
}
operator HDC () {
return dc;
}
HDC dc;
PRBool needsRelease;
};
/**********************************************************************
*
@ -589,22 +605,16 @@ gfxWindowsFontGroup::MakeTextRun(const PRUint8 *aString, PRUint32 aLength,
}
/**
* Set the font in the DC for aContext's surface. Return the DC if we're
* successful. If it's not a win32 surface or something goes wrong or if
* the font is not a Truetype font (hence GetGlyphIndices may be buggy) then
* we're not successful and return 0.
* Set the font in the given DC. If something goes wrong or if the
* font is not a Truetype font (hence GetGlyphIndices may be buggy)
* then we're not successful and return PR_FALSE, otherwise PR_TRUE.
*/
static HDC
SetupContextFont(gfxContext *aContext, gfxWindowsFont *aFont)
static PRBool
SetupDCFont(HDC dc, gfxWindowsFont *aFont)
{
nsRefPtr<gfxASurface> surf = aContext->CurrentSurface();
HDC dc = GetDCFromSurface(surf);
if (!dc)
return 0;
HFONT hfont = aFont->GetHFONT();
if (!hfont)
return 0;
return PR_FALSE;
SelectObject(dc, hfont);
/* GetGlyphIndices is buggy for bitmap and vector fonts,
@ -612,9 +622,9 @@ SetupContextFont(gfxContext *aContext, gfxWindowsFont *aFont)
TEXTMETRIC metrics;
GetTextMetrics(dc, &metrics);
if ((metrics.tmPitchAndFamily & (TMPF_TRUETYPE)) == 0)
return 0;
return PR_FALSE;
return dc;
return PR_TRUE;
}
static PRBool
@ -685,8 +695,8 @@ gfxWindowsFontGroup::InitTextRunGDI(gfxContext *aContext, gfxTextRun *aRun,
const char *aString, PRUint32 aLength)
{
nsRefPtr<gfxWindowsFont> font = GetFontAt(0);
HDC dc = SetupContextFont(aContext, font);
if (dc) {
DCFromContext dc(aContext);
if (SetupDCFont(dc, font)) {
nsAutoTArray<WCHAR,500> glyphArray;
if (!glyphArray.AppendElements(aLength))
return;
@ -709,8 +719,8 @@ gfxWindowsFontGroup::InitTextRunGDI(gfxContext *aContext, gfxTextRun *aRun,
const PRUnichar *aString, PRUint32 aLength)
{
nsRefPtr<gfxWindowsFont> font = GetFontAt(0);
HDC dc = SetupContextFont(aContext, font);
if (dc) {
DCFromContext dc(aContext);
if (SetupDCFont(dc, font)) {
nsAutoTArray<WCHAR,500> glyphArray;
if (!glyphArray.AppendElements(aLength))
return;
@ -920,6 +930,11 @@ public:
}
if (rv == E_PENDING) {
if (shapeDC == mDC) {
// we already tried this once, something failed, give up
return GDI_ERROR;
}
SelectFont();
shapeDC = mDC;
@ -1516,9 +1531,7 @@ void
gfxWindowsFontGroup::InitTextRunUniscribe(gfxContext *aContext, gfxTextRun *aRun, const PRUnichar *aString,
PRUint32 aLength)
{
nsRefPtr<gfxASurface> surf = aContext->CurrentSurface();
HDC aDC = GetDCFromSurface(surf);
NS_ASSERTION(aDC, "No DC");
DCFromContext aDC(aContext);
const PRBool isRTL = aRun->IsRightToLeft();