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PlatGTK.cxx
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PlatGTK.cxx
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// Scintilla source code edit control
// PlatGTK.cxx - implementation of platform facilities on GTK+/Linux
// Copyright 1998-2004 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <glib.h>
#include <gmodule.h>
#include <gdk/gdk.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include "Platform.h"
#include "Scintilla.h"
#include "ScintillaWidget.h"
#include "UniConversion.h"
#include "XPM.h"
/* GLIB must be compiled with thread support, otherwise we
will bail on trying to use locks, and that could lead to
problems for someone. `glib-config --libs gthread` needs
to be used to get the glib libraries for linking, otherwise
g_thread_init will fail */
#define USE_LOCK defined(G_THREADS_ENABLED) && !defined(G_THREADS_IMPL_NONE)
/* Use fast way of getting char data on win32 to work around problems
with gdk_string_extents. */
#define FAST_WAY
#include "Converter.h"
#ifdef _MSC_VER
// Ignore unreferenced local functions in GTK+ headers
#pragma warning(disable: 4505)
#endif
#ifdef SCI_NAMESPACE
using namespace Scintilla;
#endif
enum encodingType { singleByte, UTF8, dbcs};
struct LOGFONT {
int size;
bool bold;
bool italic;
int characterSet;
char faceName[300];
};
#if USE_LOCK
static GMutex *fontMutex = NULL;
static void InitializeGLIBThreads() {
if (!g_thread_supported()) {
g_thread_init(NULL);
}
}
#endif
static void FontMutexAllocate() {
#if USE_LOCK
if (!fontMutex) {
InitializeGLIBThreads();
fontMutex = g_mutex_new();
}
#endif
}
static void FontMutexFree() {
#if USE_LOCK
if (fontMutex) {
g_mutex_free(fontMutex);
fontMutex = NULL;
}
#endif
}
static void FontMutexLock() {
#if USE_LOCK
g_mutex_lock(fontMutex);
#endif
}
static void FontMutexUnlock() {
#if USE_LOCK
if (fontMutex) {
g_mutex_unlock(fontMutex);
}
#endif
}
// On GTK+ 1.x holds a GdkFont* but on GTK+ 2.x can hold a GdkFont* or a
// PangoFontDescription*.
class FontHandle {
int width[128];
encodingType et;
public:
int ascent;
GdkFont *pfont;
PangoFontDescription *pfd;
int characterSet;
FontHandle(GdkFont *pfont_) {
et = singleByte;
ascent = 0;
pfont = pfont_;
pfd = 0;
characterSet = -1;
ResetWidths(et);
}
FontHandle(PangoFontDescription *pfd_, int characterSet_) {
et = singleByte;
ascent = 0;
pfont = 0;
pfd = pfd_;
characterSet = characterSet_;
ResetWidths(et);
}
~FontHandle() {
if (pfont)
gdk_font_unref(pfont);
pfont = 0;
if (pfd)
pango_font_description_free(pfd);
pfd = 0;
}
void ResetWidths(encodingType et_) {
et = et_;
for (int i=0; i<=127; i++) {
width[i] = 0;
}
}
int CharWidth(unsigned char ch, encodingType et_) {
int w = 0;
FontMutexLock();
if ((ch <= 127) && (et == et_)) {
w = width[ch];
}
FontMutexUnlock();
return w;
}
void SetCharWidth(unsigned char ch, int w, encodingType et_) {
if (ch <= 127) {
FontMutexLock();
if (et != et_) {
ResetWidths(et_);
}
width[ch] = w;
FontMutexUnlock();
}
}
};
// X has a 16 bit coordinate space, so stop drawing here to avoid wrapping
static const int maxCoordinate = 32000;
static FontHandle *PFont(Font &f) {
return reinterpret_cast<FontHandle *>(f.GetID());
}
static GtkWidget *PWidget(WindowID wid) {
return reinterpret_cast<GtkWidget *>(wid);
}
static GtkWidget *PWidget(Window &w) {
return PWidget(w.GetID());
}
Point Point::FromLong(long lpoint) {
return Point(
Platform::LowShortFromLong(lpoint),
Platform::HighShortFromLong(lpoint));
}
Palette::Palette() {
used = 0;
allowRealization = false;
allocatedPalette = 0;
allocatedLen = 0;
size = 100;
entries = new ColourPair[size];
}
Palette::~Palette() {
Release();
delete []entries;
entries = 0;
}
void Palette::Release() {
used = 0;
delete [](reinterpret_cast<GdkColor *>(allocatedPalette));
allocatedPalette = 0;
allocatedLen = 0;
delete []entries;
size = 100;
entries = new ColourPair[size];
}
// This method either adds a colour to the list of wanted colours (want==true)
// or retrieves the allocated colour back to the ColourPair.
// This is one method to make it easier to keep the code for wanting and retrieving in sync.
void Palette::WantFind(ColourPair &cp, bool want) {
if (want) {
for (int i=0; i < used; i++) {
if (entries[i].desired == cp.desired)
return;
}
if (used >= size) {
int sizeNew = size * 2;
ColourPair *entriesNew = new ColourPair[sizeNew];
for (int j=0; j<size; j++) {
entriesNew[j] = entries[j];
}
delete []entries;
entries = entriesNew;
size = sizeNew;
}
entries[used].desired = cp.desired;
entries[used].allocated.Set(cp.desired.AsLong());
used++;
} else {
for (int i=0; i < used; i++) {
if (entries[i].desired == cp.desired) {
cp.allocated = entries[i].allocated;
return;
}
}
cp.allocated.Set(cp.desired.AsLong());
}
}
void Palette::Allocate(Window &w) {
if (allocatedPalette) {
gdk_colormap_free_colors(gtk_widget_get_colormap(PWidget(w)),
reinterpret_cast<GdkColor *>(allocatedPalette),
allocatedLen);
delete [](reinterpret_cast<GdkColor *>(allocatedPalette));
allocatedPalette = 0;
allocatedLen = 0;
}
GdkColor *paletteNew = new GdkColor[used];
allocatedPalette = paletteNew;
gboolean *successPalette = new gboolean[used];
if (paletteNew) {
allocatedLen = used;
int iPal = 0;
for (iPal = 0; iPal < used; iPal++) {
paletteNew[iPal].red = entries[iPal].desired.GetRed() * (65535 / 255);
paletteNew[iPal].green = entries[iPal].desired.GetGreen() * (65535 / 255);
paletteNew[iPal].blue = entries[iPal].desired.GetBlue() * (65535 / 255);
paletteNew[iPal].pixel = entries[iPal].desired.AsLong();
}
gdk_colormap_alloc_colors(gtk_widget_get_colormap(PWidget(w)),
paletteNew, allocatedLen, FALSE, TRUE,
successPalette);
for (iPal = 0; iPal < used; iPal++) {
entries[iPal].allocated.Set(paletteNew[iPal].pixel);
}
}
delete []successPalette;
}
static const char *CharacterSetName(int characterSet) {
switch (characterSet) {
case SC_CHARSET_ANSI:
return "iso8859-*";
case SC_CHARSET_DEFAULT:
return "iso8859-*";
case SC_CHARSET_BALTIC:
return "iso8859-13";
case SC_CHARSET_CHINESEBIG5:
return "*-*";
case SC_CHARSET_EASTEUROPE:
return "*-2";
case SC_CHARSET_GB2312:
return "gb2312.1980-*";
case SC_CHARSET_GREEK:
return "*-7";
case SC_CHARSET_HANGUL:
return "ksc5601.1987-*";
case SC_CHARSET_MAC:
return "*-*";
case SC_CHARSET_OEM:
return "*-*";
case SC_CHARSET_RUSSIAN:
return "*-r";
case SC_CHARSET_CYRILLIC:
return "*-cp1251";
case SC_CHARSET_SHIFTJIS:
return "jisx0208.1983-*";
case SC_CHARSET_SYMBOL:
return "*-*";
case SC_CHARSET_TURKISH:
return "*-9";
case SC_CHARSET_JOHAB:
return "*-*";
case SC_CHARSET_HEBREW:
return "*-8";
case SC_CHARSET_ARABIC:
return "*-6";
case SC_CHARSET_VIETNAMESE:
return "*-*";
case SC_CHARSET_THAI:
return "iso8859-11";
case SC_CHARSET_8859_15:
return "iso8859-15";
default:
return "*-*";
}
}
static bool IsDBCSCharacterSet(int characterSet) {
switch (characterSet) {
case SC_CHARSET_GB2312:
case SC_CHARSET_HANGUL:
case SC_CHARSET_SHIFTJIS:
case SC_CHARSET_CHINESEBIG5:
return true;
default:
return false;
}
}
static void GenerateFontSpecStrings(const char *fontName, int characterSet,
char *foundary, int foundary_len,
char *faceName, int faceName_len,
char *charset, int charset_len) {
// supported font strings include:
// foundary-fontface-isoxxx-x
// fontface-isoxxx-x
// foundary-fontface
// fontface
if (strchr(fontName, '-')) {
char tmp[300];
char *d1 = NULL, *d2 = NULL, *d3 = NULL;
strncpy(tmp, fontName, sizeof(tmp) - 1);
tmp[sizeof(tmp) - 1] = '\0';
d1 = strchr(tmp, '-');
// we know the first dash exists
d2 = strchr(d1 + 1, '-');
if (d2)
d3 = strchr(d2 + 1, '-');
if (d3 && d2) {
// foundary-fontface-isoxxx-x
*d2 = '\0';
foundary[0] = '-';
foundary[1] = '\0';
strncpy(faceName, tmp, foundary_len - 1);
strncpy(charset, d2 + 1, charset_len - 1);
} else if (d2) {
// fontface-isoxxx-x
*d1 = '\0';
strcpy(foundary, "-*-");
strncpy(faceName, tmp, faceName_len - 1);
strncpy(charset, d1 + 1, charset_len - 1);
} else {
// foundary-fontface
foundary[0] = '-';
foundary[1] = '\0';
strncpy(faceName, tmp, faceName_len - 1);
strncpy(charset, CharacterSetName(characterSet), charset_len - 1);
}
} else {
strncpy(foundary, "-*-", foundary_len);
strncpy(faceName, fontName, faceName_len - 1);
strncpy(charset, CharacterSetName(characterSet), charset_len - 1);
}
}
static void SetLogFont(LOGFONT &lf, const char *faceName, int characterSet, int size, bool bold, bool italic) {
memset(&lf, 0, sizeof(lf));
lf.size = size;
lf.bold = bold;
lf.italic = italic;
lf.characterSet = characterSet;
strncpy(lf.faceName, faceName, sizeof(lf.faceName) - 1);
}
/**
* Create a hash from the parameters for a font to allow easy checking for identity.
* If one font is the same as another, its hash will be the same, but if the hash is the
* same then they may still be different.
*/
static int HashFont(const char *faceName, int characterSet, int size, bool bold, bool italic) {
return
size ^
(characterSet << 10) ^
(bold ? 0x10000000 : 0) ^
(italic ? 0x20000000 : 0) ^
faceName[0];
}
class FontCached : Font {
FontCached *next;
int usage;
LOGFONT lf;
int hash;
FontCached(const char *faceName_, int characterSet_, int size_, bool bold_, bool italic_);
~FontCached() {}
bool SameAs(const char *faceName_, int characterSet_, int size_, bool bold_, bool italic_);
virtual void Release();
static FontID CreateNewFont(const char *fontName, int characterSet,
int size, bool bold, bool italic);
static FontCached *first;
public:
static FontID FindOrCreate(const char *faceName_, int characterSet_, int size_, bool bold_, bool italic_);
static void ReleaseId(FontID fid_);
};
FontCached *FontCached::first = 0;
FontCached::FontCached(const char *faceName_, int characterSet_, int size_, bool bold_, bool italic_) :
next(0), usage(0), hash(0) {
::SetLogFont(lf, faceName_, characterSet_, size_, bold_, italic_);
hash = HashFont(faceName_, characterSet_, size_, bold_, italic_);
fid = CreateNewFont(faceName_, characterSet_, size_, bold_, italic_);
usage = 1;
}
bool FontCached::SameAs(const char *faceName_, int characterSet_, int size_, bool bold_, bool italic_) {
return
lf.size == size_ &&
lf.bold == bold_ &&
lf.italic == italic_ &&
lf.characterSet == characterSet_ &&
0 == strcmp(lf.faceName, faceName_);
}
void FontCached::Release() {
if (fid)
delete PFont(*this);
fid = 0;
}
FontID FontCached::FindOrCreate(const char *faceName_, int characterSet_, int size_, bool bold_, bool italic_) {
FontID ret = 0;
FontMutexLock();
int hashFind = HashFont(faceName_, characterSet_, size_, bold_, italic_);
for (FontCached *cur = first; cur; cur = cur->next) {
if ((cur->hash == hashFind) &&
cur->SameAs(faceName_, characterSet_, size_, bold_, italic_)) {
cur->usage++;
ret = cur->fid;
}
}
if (ret == 0) {
FontCached *fc = new FontCached(faceName_, characterSet_, size_, bold_, italic_);
if (fc) {
fc->next = first;
first = fc;
ret = fc->fid;
}
}
FontMutexUnlock();
return ret;
}
void FontCached::ReleaseId(FontID fid_) {
FontMutexLock();
FontCached **pcur = &first;
for (FontCached *cur = first; cur; cur = cur->next) {
if (cur->fid == fid_) {
cur->usage--;
if (cur->usage == 0) {
*pcur = cur->next;
cur->Release();
cur->next = 0;
delete cur;
}
break;
}
pcur = &cur->next;
}
FontMutexUnlock();
}
static GdkFont *LoadFontOrSet(const char *fontspec, int characterSet) {
if (IsDBCSCharacterSet(characterSet)) {
return gdk_fontset_load(fontspec);
} else {
return gdk_font_load(fontspec);
}
}
FontID FontCached::CreateNewFont(const char *fontName, int characterSet,
int size, bool bold, bool italic) {
char fontset[1024];
char fontspec[300];
char foundary[50];
char faceName[100];
char charset[50];
fontset[0] = '\0';
fontspec[0] = '\0';
foundary[0] = '\0';
faceName[0] = '\0';
charset[0] = '\0';
if (fontName[0] == '!') {
PangoFontDescription *pfd = pango_font_description_new();
if (pfd) {
pango_font_description_set_family(pfd, fontName+1);
pango_font_description_set_size(pfd, size * PANGO_SCALE);
pango_font_description_set_weight(pfd, bold ? PANGO_WEIGHT_BOLD : PANGO_WEIGHT_NORMAL);
pango_font_description_set_style(pfd, italic ? PANGO_STYLE_ITALIC : PANGO_STYLE_NORMAL);
return new FontHandle(pfd, characterSet);
}
}
GdkFont *newid = 0;
// If name of the font begins with a '-', assume, that it is
// a full fontspec.
if (fontName[0] == '-') {
if (strchr(fontName, ',') || IsDBCSCharacterSet(characterSet)) {
newid = gdk_fontset_load(fontName);
} else {
newid = gdk_font_load(fontName);
}
if (!newid) {
// Font not available so substitute a reasonable code font
// iso8859 appears to only allow western characters.
newid = LoadFontOrSet("-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-*",
characterSet);
}
return new FontHandle(newid);
}
// it's not a full fontspec, build one.
// This supports creating a FONT_SET
// in a method that allows us to also set size, slant and
// weight for the fontset. The expected input is multiple
// partial fontspecs seperated by comma
// eg. adobe-courier-iso10646-1,*-courier-iso10646-1,*-*-*-*
if (strchr(fontName, ',')) {
// build a fontspec and use gdk_fontset_load
int remaining = sizeof(fontset);
char fontNameCopy[1024];
strncpy(fontNameCopy, fontName, sizeof(fontNameCopy) - 1);
char *fn = fontNameCopy;
char *fp = strchr(fn, ',');
for (;;) {
const char *spec = "%s%s%s%s-*-*-*-%0d-*-*-*-*-%s";
if (fontset[0] != '\0') {
// if this is not the first font in the list,
// append a comma seperator
spec = ",%s%s%s%s-*-*-*-%0d-*-*-*-*-%s";
}
if (fp)
*fp = '\0'; // nullify the comma
GenerateFontSpecStrings(fn, characterSet,
foundary, sizeof(foundary),
faceName, sizeof(faceName),
charset, sizeof(charset));
g_snprintf(fontspec,
sizeof(fontspec) - 1,
spec,
foundary, faceName,
bold ? "-bold" : "-medium",
italic ? "-i" : "-r",
size * 10,
charset);
// if this is the first font in the list, and
// we are doing italic, add an oblique font
// to the list
if (italic && fontset[0] == '\0') {
strncat(fontset, fontspec, remaining - 1);
remaining -= strlen(fontset);
g_snprintf(fontspec,
sizeof(fontspec) - 1,
",%s%s%s-o-*-*-*-%0d-*-*-*-*-%s",
foundary, faceName,
bold ? "-bold" : "-medium",
size * 10,
charset);
}
strncat(fontset, fontspec, remaining - 1);
remaining -= strlen(fontset);
if (!fp)
break;
fn = fp + 1;
fp = strchr(fn, ',');
}
newid = gdk_fontset_load(fontset);
if (newid)
return new FontHandle(newid);
// if fontset load failed, fall through, we'll use
// the last font entry and continue to try and
// get something that matches
}
// single fontspec support
GenerateFontSpecStrings(fontName, characterSet,
foundary, sizeof(foundary),
faceName, sizeof(faceName),
charset, sizeof(charset));
g_snprintf(fontspec,
sizeof(fontspec) - 1,
"%s%s%s%s-*-*-*-%0d-*-*-*-*-%s",
foundary, faceName,
bold ? "-bold" : "-medium",
italic ? "-i" : "-r",
size * 10,
charset);
newid = LoadFontOrSet(fontspec, characterSet);
if (!newid) {
// some fonts have oblique, not italic
g_snprintf(fontspec,
sizeof(fontspec) - 1,
"%s%s%s%s-*-*-*-%0d-*-*-*-*-%s",
foundary, faceName,
bold ? "-bold" : "-medium",
italic ? "-o" : "-r",
size * 10,
charset);
newid = LoadFontOrSet(fontspec, characterSet);
}
if (!newid) {
g_snprintf(fontspec,
sizeof(fontspec) - 1,
"-*-*-*-*-*-*-*-%0d-*-*-*-*-%s",
size * 10,
charset);
newid = gdk_font_load(fontspec);
}
if (!newid) {
// Font not available so substitute a reasonable code font
// iso8859 appears to only allow western characters.
newid = LoadFontOrSet("-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-*",
characterSet);
}
return new FontHandle(newid);
}
Font::Font() : fid(0) {}
Font::~Font() {}
void Font::Create(const char *faceName, int characterSet, int size,
bool bold, bool italic, int) {
Release();
fid = FontCached::FindOrCreate(faceName, characterSet, size, bold, italic);
}
void Font::Release() {
if (fid)
FontCached::ReleaseId(fid);
fid = 0;
}
// Required on OS X
#ifdef SCI_NAMESPACE
namespace Scintilla {
#endif
class SurfaceImpl : public Surface {
encodingType et;
GdkDrawable *drawable;
GdkGC *gc;
GdkPixmap *ppixmap;
int x;
int y;
bool inited;
bool createdGC;
PangoContext *pcontext;
PangoLayout *layout;
Converter conv;
int characterSet;
void SetConverter(int characterSet_);
public:
SurfaceImpl();
virtual ~SurfaceImpl();
void Init(WindowID wid);
void Init(SurfaceID sid, WindowID wid);
void InitPixMap(int width, int height, Surface *surface_, WindowID wid);
void Release();
bool Initialised();
void PenColour(ColourAllocated fore);
int LogPixelsY();
int DeviceHeightFont(int points);
void MoveTo(int x_, int y_);
void LineTo(int x_, int y_);
void Polygon(Point *pts, int npts, ColourAllocated fore, ColourAllocated back);
void RectangleDraw(PRectangle rc, ColourAllocated fore, ColourAllocated back);
void FillRectangle(PRectangle rc, ColourAllocated back);
void FillRectangle(PRectangle rc, Surface &surfacePattern);
void RoundedRectangle(PRectangle rc, ColourAllocated fore, ColourAllocated back);
void AlphaRectangle(PRectangle rc, int cornerSize, ColourAllocated fill, int alphaFill,
ColourAllocated outline, int alphaOutline, int flags);
void Ellipse(PRectangle rc, ColourAllocated fore, ColourAllocated back);
void Copy(PRectangle rc, Point from, Surface &surfaceSource);
void DrawTextBase(PRectangle rc, Font &font_, int ybase, const char *s, int len, ColourAllocated fore);
void DrawTextNoClip(PRectangle rc, Font &font_, int ybase, const char *s, int len, ColourAllocated fore, ColourAllocated back);
void DrawTextClipped(PRectangle rc, Font &font_, int ybase, const char *s, int len, ColourAllocated fore, ColourAllocated back);
void DrawTextTransparent(PRectangle rc, Font &font_, int ybase, const char *s, int len, ColourAllocated fore);
void MeasureWidths(Font &font_, const char *s, int len, int *positions);
int WidthText(Font &font_, const char *s, int len);
int WidthChar(Font &font_, char ch);
int Ascent(Font &font_);
int Descent(Font &font_);
int InternalLeading(Font &font_);
int ExternalLeading(Font &font_);
int Height(Font &font_);
int AverageCharWidth(Font &font_);
int SetPalette(Palette *pal, bool inBackGround);
void SetClip(PRectangle rc);
void FlushCachedState();
void SetUnicodeMode(bool unicodeMode_);
void SetDBCSMode(int codePage);
};
#ifdef SCI_NAMESPACE
}
#endif
const char *CharacterSetID(int characterSet) {
switch (characterSet) {
case SC_CHARSET_ANSI:
return "";
case SC_CHARSET_DEFAULT:
return "ISO-8859-1";
case SC_CHARSET_BALTIC:
return "ISO-8859-13";
case SC_CHARSET_CHINESEBIG5:
return "BIG-5";
case SC_CHARSET_EASTEUROPE:
return "ISO-8859-2";
case SC_CHARSET_GB2312:
return "GB2312";
case SC_CHARSET_GREEK:
return "ISO-8859-7";
case SC_CHARSET_HANGUL:
return "";
case SC_CHARSET_MAC:
return "MACINTOSH";
case SC_CHARSET_OEM:
return "ASCII";
case SC_CHARSET_RUSSIAN:
return "KOI8-R";
case SC_CHARSET_CYRILLIC:
return "CP1251";
case SC_CHARSET_SHIFTJIS:
return "SHIFT-JIS";
case SC_CHARSET_SYMBOL:
return "";
case SC_CHARSET_TURKISH:
return "ISO-8859-9";
case SC_CHARSET_JOHAB:
return "JOHAB";
case SC_CHARSET_HEBREW:
return "ISO-8859-8";
case SC_CHARSET_ARABIC:
return "ISO-8859-6";
case SC_CHARSET_VIETNAMESE:
return "";
case SC_CHARSET_THAI:
return "ISO-8859-11";
case SC_CHARSET_8859_15:
return "ISO-8859-15";
default:
return "";
}
}
void SurfaceImpl::SetConverter(int characterSet_) {
if (characterSet != characterSet_) {
characterSet = characterSet_;
conv.Open("UTF-8", CharacterSetID(characterSet), false);
}
}
SurfaceImpl::SurfaceImpl() : et(singleByte), drawable(0), gc(0), ppixmap(0),
x(0), y(0), inited(false), createdGC(false)
, pcontext(0), layout(0), characterSet(-1) {
}
SurfaceImpl::~SurfaceImpl() {
Release();
}
void SurfaceImpl::Release() {
et = singleByte;
drawable = 0;
if (createdGC) {
createdGC = false;
gdk_gc_unref(gc);
}
gc = 0;
if (ppixmap)
gdk_pixmap_unref(ppixmap);
ppixmap = 0;
if (layout)
g_object_unref(layout);
layout = 0;
if (pcontext)
g_object_unref(pcontext);
pcontext = 0;
conv.Close();
characterSet = -1;
x = 0;
y = 0;
inited = false;
createdGC = false;
}
bool SurfaceImpl::Initialised() {
return inited;
}
void SurfaceImpl::Init(WindowID wid) {
Release();
PLATFORM_ASSERT(wid);
pcontext = gtk_widget_create_pango_context(PWidget(wid));
PLATFORM_ASSERT(pcontext);
layout = pango_layout_new(pcontext);
PLATFORM_ASSERT(layout);
inited = true;
}
void SurfaceImpl::Init(SurfaceID sid, WindowID wid) {
PLATFORM_ASSERT(sid);
GdkDrawable *drawable_ = reinterpret_cast<GdkDrawable *>(sid);
Release();
PLATFORM_ASSERT(wid);
pcontext = gtk_widget_create_pango_context(PWidget(wid));
layout = pango_layout_new(pcontext);
drawable = drawable_;
gc = gdk_gc_new(drawable_);
// Ask for lines that do not paint the last pixel so is like Win32
gdk_gc_set_line_attributes(gc, 0, GDK_LINE_SOLID, GDK_CAP_NOT_LAST, GDK_JOIN_MITER);
createdGC = true;
inited = true;
}
void SurfaceImpl::InitPixMap(int width, int height, Surface *surface_, WindowID wid) {
PLATFORM_ASSERT(surface_);
Release();
SurfaceImpl *surfImpl = static_cast<SurfaceImpl *>(surface_);
PLATFORM_ASSERT(surfImpl->drawable);
PLATFORM_ASSERT(wid);
pcontext = gtk_widget_create_pango_context(PWidget(wid));
PLATFORM_ASSERT(pcontext);
layout = pango_layout_new(pcontext);
PLATFORM_ASSERT(layout);
if (height > 0 && width > 0)
ppixmap = gdk_pixmap_new(surfImpl->drawable, width, height, -1);
drawable = ppixmap;
gc = gdk_gc_new(surfImpl->drawable);
// Ask for lines that do not paint the last pixel so is like Win32
gdk_gc_set_line_attributes(gc, 0, GDK_LINE_SOLID, GDK_CAP_NOT_LAST, GDK_JOIN_MITER);
createdGC = true;
inited = true;
}
void SurfaceImpl::PenColour(ColourAllocated fore) {
if (gc) {
GdkColor co;
co.pixel = fore.AsLong();
gdk_gc_set_foreground(gc, &co);
}
}
int SurfaceImpl::LogPixelsY() {
return 72;
}
int SurfaceImpl::DeviceHeightFont(int points) {
int logPix = LogPixelsY();
return (points * logPix + logPix / 2) / 72;
}
void SurfaceImpl::MoveTo(int x_, int y_) {
x = x_;
y = y_;
}
void SurfaceImpl::LineTo(int x_, int y_) {
if (drawable && gc) {
gdk_draw_line(drawable, gc,
x, y,
x_, y_);
}
x = x_;
y = y_;
}
void SurfaceImpl::Polygon(Point *pts, int npts, ColourAllocated fore,
ColourAllocated back) {
GdkPoint gpts[20];
if (npts < static_cast<int>((sizeof(gpts) / sizeof(gpts[0])))) {
for (int i = 0;i < npts;i++) {
gpts[i].x = pts[i].x;
gpts[i].y = pts[i].y;
}
PenColour(back);
gdk_draw_polygon(drawable, gc, 1, gpts, npts);
PenColour(fore);
gdk_draw_polygon(drawable, gc, 0, gpts, npts);
}
}
void SurfaceImpl::RectangleDraw(PRectangle rc, ColourAllocated fore, ColourAllocated back) {
if (gc && drawable) {
PenColour(back);
gdk_draw_rectangle(drawable, gc, 1,
rc.left + 1, rc.top + 1,
rc.right - rc.left - 2, rc.bottom - rc.top - 2);
PenColour(fore);
// The subtraction of 1 off the width and height here shouldn't be needed but
// otherwise a different rectangle is drawn than would be done if the fill parameter == 1
gdk_draw_rectangle(drawable, gc, 0,
rc.left, rc.top,
rc.right - rc.left - 1, rc.bottom - rc.top - 1);
}
}
void SurfaceImpl::FillRectangle(PRectangle rc, ColourAllocated back) {
PenColour(back);
if (drawable && (rc.left < maxCoordinate)) { // Protect against out of range
gdk_draw_rectangle(drawable, gc, 1,
rc.left, rc.top,
rc.right - rc.left, rc.bottom - rc.top);
}
}
void SurfaceImpl::FillRectangle(PRectangle rc, Surface &surfacePattern) {
if (static_cast<SurfaceImpl &>(surfacePattern).drawable) {
// Tile pattern over rectangle
// Currently assumes 8x8 pattern
int widthPat = 8;
int heightPat = 8;
for (int xTile = rc.left; xTile < rc.right; xTile += widthPat) {
int widthx = (xTile + widthPat > rc.right) ? rc.right - xTile : widthPat;
for (int yTile = rc.top; yTile < rc.bottom; yTile += heightPat) {
int heighty = (yTile + heightPat > rc.bottom) ? rc.bottom - yTile : heightPat;
gdk_draw_pixmap(drawable,
gc,
static_cast<SurfaceImpl &>(surfacePattern).drawable,
0, 0,
xTile, yTile,
widthx, heighty);
}
}
} else {
// Something is wrong so try to show anyway
// Shows up black because colour not allocated
FillRectangle(rc, ColourAllocated(0));
}
}
void SurfaceImpl::RoundedRectangle(PRectangle rc, ColourAllocated fore, ColourAllocated back) {
if (((rc.right - rc.left) > 4) && ((rc.bottom - rc.top) > 4)) {
// Approximate a round rect with some cut off corners
Point pts[] = {
Point(rc.left + 2, rc.top),
Point(rc.right - 2, rc.top),
Point(rc.right, rc.top + 2),
Point(rc.right, rc.bottom - 2),
Point(rc.right - 2, rc.bottom),
Point(rc.left + 2, rc.bottom),
Point(rc.left, rc.bottom - 2),
Point(rc.left, rc.top + 2),
};
Polygon(pts, sizeof(pts) / sizeof(pts[0]), fore, back);
} else {
RectangleDraw(rc, fore, back);
}
}
// Plot a point into a guint32 buffer symetrically to all 4 qudrants
static void AllFour(guint32 *pixels, int stride, int width, int height, int x, int y, guint32 val) {
pixels[y*stride+x] = val;
pixels[y*stride+width-1-x] = val;
pixels[(height-1-y)*stride+x] = val;
pixels[(height-1-y)*stride+width-1-x] = val;
}
static unsigned int GetRValue(unsigned int co) {
return (co >> 16) & 0xff;