From be1598db7f828991266a0289c893a15b3d508111 Mon Sep 17 00:00:00 2001
From: nyamatongwe <devnull@localhost>
Date: Fri, 10 Jan 2003 11:06:02 +0000
Subject: Initial version.

---
 src/XPM.cxx | 297 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 297 insertions(+)
 create mode 100644 src/XPM.cxx

(limited to 'src/XPM.cxx')

diff --git a/src/XPM.cxx b/src/XPM.cxx
new file mode 100644
index 000000000..5758b7810
--- /dev/null
+++ b/src/XPM.cxx
@@ -0,0 +1,297 @@
+// Scintilla source code edit control
+/** @file XPM.cxx
+ ** Define a class that holds data in the X Pixmap (XPM) format,
+ **/
+// Copyright 1998-2003 by Neil Hodgson <neilh@scintilla.org>
+// The License.txt file describes the conditions under which this software may be distributed.
+
+#include <string.h>
+#include <stdlib.h>
+
+#include "Platform.h"
+
+#include "XPM.h"
+
+static const char *NextField(const char *s) {
+	while (*s && *s != ' ') {
+		s++;
+	}
+	while (*s && *s == ' ') {
+		s++;
+	}
+	return s;
+}
+
+// Data lines in XPM can be terminated either with NUL or "
+static size_t MeasureLength(const char *s) {
+	size_t i = 0;
+	while (s[i] && (s[i] != '\"'))
+		i++;
+	return i;
+}
+
+ColourAllocated XPM::ColourFromCode(int ch) {
+	return colourCodeTable[ch]->allocated;
+#ifdef SLOW
+	for (int i=0;i<nColours;i++) {
+		if (codes[i] == ch) {
+			return colours[i].allocated;
+		}
+	}
+	return colours[0].allocated;
+#endif
+}
+
+void XPM::FillRun(Surface *surface, int code, int startX, int y, int x) {
+	if ((code != codeTransparent) && (startX != x)) {
+		PRectangle rc(startX, y, x, y+1);
+		surface->FillRectangle(rc, ColourFromCode(code));
+	}
+}
+
+XPM::XPM(const char *textForm) : 
+	data(0),	codes(0), colours(0), lines(0) {
+	Init(textForm);
+}
+
+XPM::XPM(const char * const *linesForm) :
+	data(0),	codes(0), colours(0), lines(0) {
+	Init(linesForm);
+}
+
+XPM::~XPM() {
+	Clear();
+}
+
+void XPM::Init(const char *textForm) {
+	Clear();
+	// Test done is two parts to avoid possibility of overstepping the memory
+	// if memcmp implemented strangely. Must be 4 bytes at least at destination.
+	if ((0 == memcmp(textForm, "/* X", 4)) && (0 == memcmp(textForm, "/* XPM */", 9))) {
+		// Build the lines form out of the text form
+		const char **linesForm = LinesFormFromTextForm(textForm);
+		Init(linesForm);
+		delete []linesForm;
+	} else {
+		// It is really in line form
+		Init(reinterpret_cast<const char * const *>(textForm));
+	}
+}
+
+void XPM::Init(const char * const *linesForm) {
+	Clear();
+	height = 1;
+	width = 1;
+	nColours = 1;
+	data = NULL;
+	codeTransparent = ' ';
+	codes = NULL;
+	colours = NULL;
+	lines = NULL;
+	if (!linesForm)
+		return;
+
+	const char *line0 = linesForm[0];
+	width = atoi(line0);
+	line0 = NextField(line0);
+	height = atoi(line0);
+	line0 = NextField(line0);
+	nColours = atoi(line0);
+	codes = new char[nColours];
+	colours = new ColourPair[nColours];
+
+	int strings = 1+height+nColours;
+	lines = new char *[strings];
+	int allocation = 0;
+	for (int i=0; i<strings; i++) {
+		allocation += MeasureLength(linesForm[i]) + 1;
+	}
+	data = new char[allocation];
+	char *nextBit = data;
+	for (int j=0; j<strings; j++) {
+		lines[j] = nextBit;
+		size_t len = MeasureLength(linesForm[j]);
+		memcpy(nextBit, linesForm[j], len);
+		nextBit += len;
+		*nextBit++ = '\0';
+	}
+
+	for (int code=0;code<256; code++) {
+		colourCodeTable[code] = 0;
+	}
+
+	for (int c=0; c<nColours; c++) {
+		const char *colourDef = linesForm[c+1];
+		codes[c] = colourDef[0];
+		colourDef += 4;
+		if (*colourDef == '#') {
+			colours[c].desired.Set(colourDef);
+		} else {
+			colours[c].desired = ColourDesired(0xff, 0xff, 0xff);
+			codeTransparent = codes[c];
+		}
+		colourCodeTable[static_cast<unsigned char>(codes[c])] = &(colours[c]);
+	}
+}
+
+void XPM::Clear() {
+	delete []data;
+	data = 0;
+	delete []codes;
+	codes = 0;
+	delete []colours;
+	colours = 0;
+	delete []lines;
+	lines = 0;
+}
+
+void XPM::RefreshColourPalette(Palette &pal, bool want) {
+	if (!data || !codes || !colours || !lines) {
+		return;
+	}
+	for (int i=0;i<nColours;i++) {
+		pal.WantFind(colours[i], want);
+	}
+}
+
+void XPM::CopyDesiredColours() {
+	if (!data || !codes || !colours || !lines) {
+		return;
+	}
+	for (int i=0;i<nColours;i++) {
+		colours[i].Copy();
+	}
+}
+
+void XPM::Draw(Surface *surface, PRectangle &rc) {
+	if (!data || !codes || !colours || !lines) {
+		return;
+	}
+	// Centre the pixmap
+	int startY = rc.top + (rc.Height() - height) / 2;
+	int startX = rc.left + (rc.Width() - width) / 2;
+	for (int y=0;y<height;y++) {
+		int prevCode = 0;
+		int xStartRun = 0;
+		for (int x=0; x<width; x++) {
+			int code = lines[y+nColours+1][x];
+			if (code != prevCode) {
+				FillRun(surface, prevCode, startX + xStartRun, startY + y, startX + x);
+				xStartRun = x;
+				prevCode = code;
+			}
+		}
+		FillRun(surface, prevCode, startX + xStartRun, startY + y, startX + width);
+	}
+}
+
+const char **XPM::LinesFormFromTextForm(const char *textForm) {
+	// Build the lines form out of the text form
+	const char **linesForm = 0;
+	int countQuotes = 0;
+	int strings=1;
+	for (int j=0; countQuotes < (2*strings); j++) {
+		if (textForm[j] == '\"') {
+			if (countQuotes == 0) {
+				const char *line0 = textForm + j + 1;
+				// Skip width
+				line0 = NextField(line0);
+				// Add 1 line for each pixel of height
+				strings += atoi(line0);
+				line0 = NextField(line0);
+				// Add 1 line for each colour
+				strings += atoi(line0);
+				linesForm = new const char *[strings];
+			}
+			if (linesForm && ((countQuotes & 1) == 0)) {
+				linesForm[countQuotes / 2] = textForm + j + 1;
+			}
+			countQuotes++;
+		}
+	}
+	return linesForm;
+}
+
+// In future, may want to minimize search time by sorting and using a binary search.
+
+XPMSet::XPMSet() : set(0), len(0), maximum(0), height(-1), width(-1) {
+}
+
+XPMSet::~XPMSet() {
+	Clear();
+}
+
+void XPMSet::Clear() {
+	for (int i=0;i<maximum;i++) {
+		delete set[i];
+	}
+	delete []set;
+	set = 0;
+	len = 0;
+	maximum = 0;
+	height = -1;
+	width = -1;
+}
+
+void XPMSet::Add(int id, const char *textForm) {
+	// Invalidate cached dimensions
+	height = -1;
+	width = -1;
+
+	// Replace if this id already present
+	for (int i=0;i<maximum;i++) {
+		if (set[i]->GetId() == id) {
+			set[i]->Init(textForm);
+			return;
+		}
+	}
+
+	// No present, so add to end
+	XPM *pxpm = new XPM(textForm);
+	if (pxpm) {
+		pxpm->SetId(id);
+		pxpm->CopyDesiredColours();
+		if (len == maximum) {
+			int lenNew = len + 100;
+			XPM **setNew = new XPM *[lenNew];
+			for (int i=0; i<maximum; i++) {
+				setNew[i] = set[i];
+			}
+			delete []set;
+			set = setNew;
+		}
+		set[maximum] = pxpm;
+		maximum++;
+	}
+}
+
+XPM *XPMSet::Get(int id) {
+	for (int i=0;i<maximum;i++) {
+		if (set[i]->GetId() == id) {
+			return set[i];
+		}
+	}
+	return 0;
+}
+
+int XPMSet::GetHeight() {
+	if (height < 0) {
+		for (int i=0; i<maximum; i++) {
+			if (height < set[i]->GetHeight()) {
+				height = set[i]->GetHeight();
+			}
+		}
+	}
+	return (height > 0) ? height : 0;
+}
+
+int XPMSet::GetWidth() {
+	if (width < 0) {
+		for (int i=0; i<maximum; i++) {
+			if (width < set[i]->GetWidth()) {
+				width = set[i]->GetWidth();
+			}
+		}
+	}
+	return (width > 0) ? width : 0;
+}
-- 
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