author | prr |
Mon, 23 Nov 2015 09:58:44 -0800 | |
changeset 34414 | e496a8d8fc8a |
child 34813 | b3a2fa246c32 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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#include <jni_util.h> |
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#include <stdlib.h> |
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#include "hb.h" |
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#include "hb-jdk.h" |
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#include "hb-ot.h" |
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#ifdef MACOSX |
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#include "hb-coretext.h" |
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#endif |
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#include "scriptMapping.h" |
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static jclass gvdClass = 0; |
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static const char* gvdClassName = "sun/font/GlyphLayout$GVData"; |
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static jfieldID gvdCountFID = 0; |
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static jfieldID gvdFlagsFID = 0; |
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static jfieldID gvdGlyphsFID = 0; |
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static jfieldID gvdPositionsFID = 0; |
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static jfieldID gvdIndicesFID = 0; |
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static int jniInited = 0; |
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static void getFloat(JNIEnv* env, jobject pt, jfloat *x, jfloat *y) { |
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*x = (*env)->GetFloatField(env, pt, sunFontIDs.xFID); |
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*y = (*env)->GetFloatField(env, pt, sunFontIDs.yFID); |
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} |
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static void putFloat(JNIEnv* env, jobject pt, jfloat x, jfloat y) { |
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(*env)->SetFloatField(env, pt, sunFontIDs.xFID, x); |
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(*env)->SetFloatField(env, pt, sunFontIDs.yFID, y); |
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} |
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static int init_JNI_IDs(JNIEnv *env) { |
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if (jniInited) { |
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return jniInited; |
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} |
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CHECK_NULL_RETURN(gvdClass = (*env)->FindClass(env, gvdClassName), 0); |
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CHECK_NULL_RETURN(gvdClass = (jclass)(*env)->NewGlobalRef(env, gvdClass), 0); |
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CHECK_NULL_RETURN(gvdCountFID = (*env)->GetFieldID(env, gvdClass, "_count", "I"), 0); |
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CHECK_NULL_RETURN(gvdFlagsFID = (*env)->GetFieldID(env, gvdClass, "_flags", "I"), 0); |
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CHECK_NULL_RETURN(gvdGlyphsFID = (*env)->GetFieldID(env, gvdClass, "_glyphs", "[I"), 0); |
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CHECK_NULL_RETURN(gvdPositionsFID = (*env)->GetFieldID(env, gvdClass, "_positions", "[F"), 0); |
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CHECK_NULL_RETURN(gvdIndicesFID = (*env)->GetFieldID(env, gvdClass, "_indices", "[I"), 0); |
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jniInited = 1; |
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return jniInited; |
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} |
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// gmask is the composite font slot mask |
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// baseindex is to be added to the character (code point) index. |
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int storeGVData(JNIEnv* env, |
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jobject gvdata, jint slot, jint baseIndex, jobject startPt, |
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int glyphCount, hb_glyph_info_t *glyphInfo, |
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hb_glyph_position_t *glyphPos, hb_direction_t direction) { |
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int i; |
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float x=0, y=0; |
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float startX, startY; |
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float scale = 1.0f/64.0f; |
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unsigned int* glyphs; |
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float* positions; |
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if (!init_JNI_IDs(env)) { |
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return 0; |
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} |
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int initialCount = (*env)->GetIntField(env, gvdata, gvdCountFID); |
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jarray glyphArray = |
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(jarray)(*env)->GetObjectField(env, gvdata, gvdGlyphsFID); |
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jarray posArray = |
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(jarray)(*env)->GetObjectField(env, gvdata, gvdPositionsFID); |
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if (glyphArray == NULL || posArray == NULL) |
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{ |
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JNU_ThrowArrayIndexOutOfBoundsException(env, ""); |
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return 0; |
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} |
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// The Java code catches the IIOBE and expands the storage |
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// and re-invokes layout. I suppose this is expected to be rare |
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// because at least in a single threaded case there should be |
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// re-use of the same container, but it is a little wasteful/distateful. |
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int glyphArrayLen = (*env)->GetArrayLength(env, glyphArray); |
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int posArrayLen = (*env)->GetArrayLength(env, posArray); |
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int maxGlyphs = glyphCount + initialCount; |
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if ((maxGlyphs > glyphArrayLen) || |
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(maxGlyphs * 2 + 2 > posArrayLen)) |
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{ |
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JNU_ThrowArrayIndexOutOfBoundsException(env, ""); |
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return 0; |
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} |
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getFloat(env, startPt, &startX, &startY); |
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glyphs = |
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(unsigned int*)(*env)->GetPrimitiveArrayCritical(env, glyphArray, NULL); |
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positions = (jfloat*)(*env)->GetPrimitiveArrayCritical(env, posArray, NULL); |
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for (i = 0; i < glyphCount; i++) { |
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120 |
int storei = i + initialCount; |
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121 |
int index = glyphInfo[i].codepoint | slot; |
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122 |
if (i<glyphCount)glyphs[storei] = (unsigned int)index; |
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123 |
positions[(storei*2)] = startX + x + glyphPos[i].x_offset * scale; |
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124 |
positions[(storei*2)+1] = startY + y - glyphPos[i].y_offset * scale; |
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125 |
x += glyphPos[i].x_advance * scale; |
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126 |
y += glyphPos[i].y_advance * scale; |
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127 |
} |
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128 |
int storeadv = initialCount+glyphCount; |
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129 |
// The final slot in the positions array is important |
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130 |
// because when the GlyphVector is created from this |
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131 |
// data it determines the overall advance of the glyphvector |
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132 |
// and this is used in positioning the next glyphvector |
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133 |
// during rendering where text is broken into runs. |
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134 |
// We also need to report it back into "pt", so layout can |
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135 |
// pass it back down for that next run in this code. |
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136 |
positions[(storeadv*2)] = startX + x; |
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137 |
positions[(storeadv*2)+1] = startY + y; |
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138 |
(*env)->ReleasePrimitiveArrayCritical(env, glyphArray, glyphs, 0); |
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139 |
(*env)->ReleasePrimitiveArrayCritical(env, posArray, positions, 0); |
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140 |
putFloat(env, startPt,positions[(storeadv*2)],positions[(storeadv*2)+1] ); |
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141 |
jarray inxArray = |
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142 |
(jarray)(*env)->GetObjectField(env, gvdata, gvdIndicesFID); |
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143 |
unsigned int* indices = |
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144 |
(unsigned int*)(*env)->GetPrimitiveArrayCritical(env, inxArray, NULL); |
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145 |
int prevCluster = -1; |
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146 |
for (i = 0; i < glyphCount; i++) { |
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147 |
int cluster = glyphInfo[i].cluster; |
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148 |
if (direction == HB_DIRECTION_LTR) { |
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149 |
// I need to understand what hb does when processing a substring |
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150 |
// I expected the cluster index to be from the start of the text |
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151 |
// to process. |
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152 |
// Instead it appears to be from the start of the whole thing. |
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153 |
indices[i+initialCount] = cluster; |
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154 |
} else { |
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155 |
indices[i+initialCount] = baseIndex + glyphCount -1 -i; |
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156 |
} |
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157 |
} |
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158 |
(*env)->ReleasePrimitiveArrayCritical(env, inxArray, indices, 0); |
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159 |
(*env)->SetIntField(env, gvdata, gvdCountFID, initialCount+glyphCount); |
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160 |
return initialCount+glyphCount; |
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161 |
} |
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162 |
|
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163 |
static float euclidianDistance(float a, float b) |
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164 |
{ |
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165 |
float root; |
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166 |
if (a < 0) { |
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167 |
a = -a; |
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168 |
} |
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169 |
|
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170 |
if (b < 0) { |
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171 |
b = -b; |
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172 |
} |
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173 |
|
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174 |
if (a == 0) { |
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175 |
return b; |
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176 |
} |
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177 |
|
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178 |
if (b == 0) { |
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179 |
return a; |
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180 |
} |
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181 |
|
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182 |
/* Do an initial approximation, in root */ |
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183 |
root = a > b ? a + (b / 2) : b + (a / 2); |
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184 |
|
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185 |
/* An unrolled Newton-Raphson iteration sequence */ |
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186 |
root = (root + (a * (a / root)) + (b * (b / root)) + 1) / 2; |
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187 |
root = (root + (a * (a / root)) + (b * (b / root)) + 1) / 2; |
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188 |
root = (root + (a * (a / root)) + (b * (b / root)) + 1) / 2; |
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189 |
|
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190 |
return root; |
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191 |
} |
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192 |
|
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193 |
JDKFontInfo* |
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194 |
createJDKFontInfo(JNIEnv *env, |
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195 |
jobject font2D, |
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196 |
jobject fontStrike, |
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197 |
jfloat ptSize, |
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198 |
jlong pScaler, |
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199 |
jlong pNativeFont, |
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200 |
jfloatArray matrix, |
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201 |
jboolean aat) { |
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202 |
|
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203 |
|
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204 |
JDKFontInfo *fi = (JDKFontInfo*)malloc(sizeof(JDKFontInfo)); |
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205 |
if (!fi) { |
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206 |
return NULL; |
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207 |
} |
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208 |
fi->env = env; // this is valid only for the life of this JNI call. |
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209 |
fi->font2D = font2D; |
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210 |
fi->fontStrike = fontStrike; |
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211 |
fi->nativeFont = pNativeFont; |
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212 |
fi->aat = aat; |
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213 |
(*env)->GetFloatArrayRegion(env, matrix, 0, 4, fi->matrix); |
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214 |
fi->ptSize = ptSize; |
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215 |
fi->xPtSize = euclidianDistance(fi->matrix[0], fi->matrix[1]); |
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216 |
fi->yPtSize = euclidianDistance(fi->matrix[2], fi->matrix[3]); |
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217 |
|
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218 |
return fi; |
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219 |
} |
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220 |
|
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221 |
|
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222 |
#define TYPO_RTL 0x80000000 |
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223 |
|
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224 |
JNIEXPORT jboolean JNICALL Java_sun_font_SunLayoutEngine_shape |
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225 |
(JNIEnv *env, jclass cls, |
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226 |
jobject font2D, |
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227 |
jobject fontStrike, |
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228 |
jfloat ptSize, |
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229 |
jfloatArray matrix, |
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230 |
jlong pScaler, |
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231 |
jlong pNativeFont, |
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232 |
jboolean aat, |
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233 |
jcharArray text, |
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234 |
jobject gvdata, |
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235 |
jint script, |
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236 |
jint offset, |
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237 |
jint limit, |
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238 |
jint baseIndex, |
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239 |
jobject startPt, |
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240 |
jint flags, |
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241 |
jint slot) { |
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242 |
|
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243 |
hb_buffer_t *buffer; |
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hb_font_t* hbfont; |
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jchar *chars; |
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jsize len; |
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int glyphCount; |
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hb_glyph_info_t *glyphInfo; |
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hb_glyph_position_t *glyphPos; |
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hb_direction_t direction = HB_DIRECTION_LTR; |
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hb_feature_t *features = NULL; |
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int featureCount = 0; |
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|
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int i; |
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unsigned int buflen; |
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|
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JDKFontInfo *jdkFontInfo = |
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createJDKFontInfo(env, font2D, fontStrike, ptSize, |
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pScaler, pNativeFont, matrix, aat); |
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if (!jdkFontInfo) { |
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return JNI_FALSE; |
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} |
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jdkFontInfo->env = env; // this is valid only for the life of this JNI call. |
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jdkFontInfo->font2D = font2D; |
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jdkFontInfo->fontStrike = fontStrike; |
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|
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hbfont = hb_jdk_font_create(jdkFontInfo, NULL); |
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|
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buffer = hb_buffer_create(); |
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hb_buffer_set_script(buffer, getHBScriptCode(script)); |
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hb_buffer_set_language(buffer, |
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hb_ot_tag_to_language(HB_OT_TAG_DEFAULT_LANGUAGE)); |
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if ((flags & TYPO_RTL) != 0) { |
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direction = HB_DIRECTION_RTL; |
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} |
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hb_buffer_set_direction(buffer, direction); |
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|
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chars = (*env)->GetCharArrayElements(env, text, NULL); |
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len = (*env)->GetArrayLength(env, text); |
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|
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hb_buffer_add_utf16(buffer, chars, len, offset, limit-offset); |
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|
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hb_shape_full(hbfont, buffer, features, featureCount, 0); |
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glyphCount = hb_buffer_get_length(buffer); |
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glyphInfo = hb_buffer_get_glyph_infos(buffer, 0); |
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glyphPos = hb_buffer_get_glyph_positions(buffer, &buflen); |
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for (i = 0; i < glyphCount; i++) { |
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int index = glyphInfo[i].codepoint; |
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int xadv = (glyphPos[i].x_advance); |
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int yadv = (glyphPos[i].y_advance); |
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} |
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// On "input" HB assigns a cluster index to each character in UTF-16. |
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// On output where a sequence of characters have been mapped to |
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// a glyph they are all mapped to the cluster index of the first character. |
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// The next cluster index will be that of the first character in the |
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// next cluster. So cluster indexes may 'skip' on output. |
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// This can also happen if there are supplementary code-points |
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// such that two UTF-16 characters are needed to make one codepoint. |
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// In RTL text you need to count down. |
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// So the following code tries to build the reverse map as expected |
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// by calling code. |
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|
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storeGVData(env, gvdata, slot, baseIndex, startPt, |
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glyphCount, glyphInfo, glyphPos, direction); |
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|
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hb_buffer_destroy (buffer); |
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hb_font_destroy(hbfont); |
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free((void*)jdkFontInfo); |
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if (features != NULL) free(features); |
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|
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return JNI_TRUE; |
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} |
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313 |