qtextureglyphcache_gl.cpp

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1/****************************************************************************-
2**-
3** Copyright (C) 2015 The Qt Company Ltd.-
4** Contact: http://www.qt.io/licensing/-
5**-
6** This file is part of the QtOpenGL module of the Qt Toolkit.-
7**-
8** $QT_BEGIN_LICENSE:LGPL21$-
9** Commercial License Usage-
10** Licensees holding valid commercial Qt licenses may use this file in-
11** accordance with the commercial license agreement provided with the-
12** Software or, alternatively, in accordance with the terms contained in-
13** a written agreement between you and The Qt Company. For licensing terms-
14** and conditions see http://www.qt.io/terms-conditions. For further-
15** information use the contact form at http://www.qt.io/contact-us.-
16**-
17** GNU Lesser General Public License Usage-
18** Alternatively, this file may be used under the terms of the GNU Lesser-
19** General Public License version 2.1 or version 3 as published by the Free-
20** Software Foundation and appearing in the file LICENSE.LGPLv21 and-
21** LICENSE.LGPLv3 included in the packaging of this file. Please review the-
22** following information to ensure the GNU Lesser General Public License-
23** requirements will be met: https://www.gnu.org/licenses/lgpl.html and-
24** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.-
25**-
26** As a special exception, The Qt Company gives you certain additional-
27** rights. These rights are described in The Qt Company LGPL Exception-
28** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.-
29**-
30** $QT_END_LICENSE$-
31**-
32****************************************************************************/-
33-
34#include "qtextureglyphcache_gl_p.h"-
35#include "qpaintengineex_opengl2_p.h"-
36#include "qglfunctions.h"-
37#include "private/qglengineshadersource_p.h"-
38-
39QT_BEGIN_NAMESPACE-
40-
41-
42QBasicAtomicInt qgltextureglyphcache_serial_number = Q_BASIC_ATOMIC_INITIALIZER(1);-
43-
44QGLTextureGlyphCache::QGLTextureGlyphCache(QFontEngine::GlyphFormat format, const QTransform &matrix)-
45 : QImageTextureGlyphCache(format, matrix)-
46 , m_textureResource(0)-
47 , pex(0)-
48 , m_blitProgram(0)-
49 , m_filterMode(Nearest)-
50 , m_serialNumber(qgltextureglyphcache_serial_number.fetchAndAddRelaxed(1))-
51{-
52#ifdef QT_GL_TEXTURE_GLYPH_CACHE_DEBUG-
53 qDebug(" -> QGLTextureGlyphCache() %p for context %p.", this, QOpenGLContext::currentContext());-
54#endif-
55 m_vertexCoordinateArray[0] = -1.0f;-
56 m_vertexCoordinateArray[1] = -1.0f;-
57 m_vertexCoordinateArray[2] = 1.0f;-
58 m_vertexCoordinateArray[3] = -1.0f;-
59 m_vertexCoordinateArray[4] = 1.0f;-
60 m_vertexCoordinateArray[5] = 1.0f;-
61 m_vertexCoordinateArray[6] = -1.0f;-
62 m_vertexCoordinateArray[7] = 1.0f;-
63-
64 m_textureCoordinateArray[0] = 0.0f;-
65 m_textureCoordinateArray[1] = 0.0f;-
66 m_textureCoordinateArray[2] = 1.0f;-
67 m_textureCoordinateArray[3] = 0.0f;-
68 m_textureCoordinateArray[4] = 1.0f;-
69 m_textureCoordinateArray[5] = 1.0f;-
70 m_textureCoordinateArray[6] = 0.0f;-
71 m_textureCoordinateArray[7] = 1.0f;-
72}
never executed: end of block
0
73-
74QGLTextureGlyphCache::~QGLTextureGlyphCache()-
75{-
76#ifdef QT_GL_TEXTURE_GLYPH_CACHE_DEBUG-
77 qDebug(" -> ~QGLTextureGlyphCache() %p.", this);-
78#endif-
79 delete m_blitProgram;-
80 if (m_textureResource)
m_textureResourceDescription
TRUEnever evaluated
FALSEnever evaluated
0
81 m_textureResource->free();
never executed: m_textureResource->free();
0
82}
never executed: end of block
0
83-
84void QGLTextureGlyphCache::createTextureData(int width, int height)-
85{-
86 QGLContext *ctx = const_cast<QGLContext *>(QGLContext::currentContext());-
87 if (ctx == 0) {
ctx == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
88 qWarning("QGLTextureGlyphCache::createTextureData: Called with no context");-
89 return;
never executed: return;
0
90 }-
91 QOpenGLFunctions *funcs = ctx->contextHandle()->functions();-
92-
93 // create in QImageTextureGlyphCache baseclass is meant to be called-
94 // only to create the initial image and does not preserve the content,-
95 // so we don't call when this function is called from resize.-
96 if ((!QGLFramebufferObject::hasOpenGLFramebufferObjects() || ctx->d_ptr->workaround_brokenFBOReadBack) && image().isNull())
!QGLFramebuffe...ufferObjects()Description
TRUEnever evaluated
FALSEnever evaluated
ctx->d_ptr->wo...kenFBOReadBackDescription
TRUEnever evaluated
FALSEnever evaluated
image().isNull()Description
TRUEnever evaluated
FALSEnever evaluated
0
97 QImageTextureGlyphCache::createTextureData(width, height);
never executed: QImageTextureGlyphCache::createTextureData(width, height);
0
98-
99 // Make the lower glyph texture size 16 x 16.-
100 if (width < 16)
width < 16Description
TRUEnever evaluated
FALSEnever evaluated
0
101 width = 16;
never executed: width = 16;
0
102 if (height < 16)
height < 16Description
TRUEnever evaluated
FALSEnever evaluated
0
103 height = 16;
never executed: height = 16;
0
104-
105 if (m_textureResource && !m_textureResource->m_texture) {
m_textureResourceDescription
TRUEnever evaluated
FALSEnever evaluated
!m_textureResource->m_textureDescription
TRUEnever evaluated
FALSEnever evaluated
0
106 delete m_textureResource;-
107 m_textureResource = 0;-
108 }
never executed: end of block
0
109-
110 if (!m_textureResource)
!m_textureResourceDescription
TRUEnever evaluated
FALSEnever evaluated
0
111 m_textureResource = new QGLGlyphTexture(ctx);
never executed: m_textureResource = new QGLGlyphTexture(ctx);
0
112-
113 funcs->glGenTextures(1, &m_textureResource->m_texture);-
114 funcs->glBindTexture(GL_TEXTURE_2D, m_textureResource->m_texture);-
115-
116 m_textureResource->m_width = width;-
117 m_textureResource->m_height = height;-
118-
119 if (m_format == QFontEngine::Format_A32) {
m_format == QF...ne::Format_A32Description
TRUEnever evaluated
FALSEnever evaluated
0
120 QVarLengthArray<uchar> data(width * height * 4);-
121 for (int i = 0; i < data.size(); ++i)
i < data.size()Description
TRUEnever evaluated
FALSEnever evaluated
0
122 data[i] = 0;
never executed: data[i] = 0;
0
123 funcs->glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, &data[0]);-
124 } else {
never executed: end of block
0
125 QVarLengthArray<uchar> data(width * height);-
126 for (int i = 0; i < data.size(); ++i)
i < data.size()Description
TRUEnever evaluated
FALSEnever evaluated
0
127 data[i] = 0;
never executed: data[i] = 0;
0
128 funcs->glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, width, height, 0, GL_ALPHA, GL_UNSIGNED_BYTE, &data[0]);-
129 }
never executed: end of block
0
130-
131 funcs->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);-
132 funcs->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);-
133 funcs->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);-
134 funcs->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);-
135 m_filterMode = Nearest;-
136}
never executed: end of block
0
137-
138void QGLTextureGlyphCache::resizeTextureData(int width, int height)-
139{-
140 QGLContext *ctx = const_cast<QGLContext *>(QGLContext::currentContext());-
141 if (ctx == 0) {
ctx == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
142 qWarning("QGLTextureGlyphCache::resizeTextureData: Called with no context");-
143 return;
never executed: return;
0
144 }-
145 QOpenGLFunctions *funcs = ctx->contextHandle()->functions();-
146-
147 int oldWidth = m_textureResource->m_width;-
148 int oldHeight = m_textureResource->m_height;-
149-
150 // Make the lower glyph texture size 16 x 16.-
151 if (width < 16)
width < 16Description
TRUEnever evaluated
FALSEnever evaluated
0
152 width = 16;
never executed: width = 16;
0
153 if (height < 16)
height < 16Description
TRUEnever evaluated
FALSEnever evaluated
0
154 height = 16;
never executed: height = 16;
0
155-
156 GLuint oldTexture = m_textureResource->m_texture;-
157 createTextureData(width, height);-
158-
159 if (!QGLFramebufferObject::hasOpenGLFramebufferObjects() || ctx->d_ptr->workaround_brokenFBOReadBack) {
!QGLFramebuffe...ufferObjects()Description
TRUEnever evaluated
FALSEnever evaluated
ctx->d_ptr->wo...kenFBOReadBackDescription
TRUEnever evaluated
FALSEnever evaluated
0
160 QImageTextureGlyphCache::resizeTextureData(width, height);-
161 Q_ASSERT(image().depth() == 8);-
162 funcs->glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, oldHeight, GL_ALPHA, GL_UNSIGNED_BYTE, image().constBits());-
163 funcs->glDeleteTextures(1, &oldTexture);-
164 return;
never executed: return;
0
165 }-
166-
167 // ### the QTextureGlyphCache API needs to be reworked to allow-
168 // ### resizeTextureData to fail-
169-
170 ctx->d_ptr->refreshCurrentFbo();-
171-
172 funcs->glBindFramebuffer(GL_FRAMEBUFFER, m_textureResource->m_fbo);-
173-
174 GLuint tmp_texture;-
175 funcs->glGenTextures(1, &tmp_texture);-
176 funcs->glBindTexture(GL_TEXTURE_2D, tmp_texture);-
177 funcs->glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, oldWidth, oldHeight, 0,-
178 GL_RGBA, GL_UNSIGNED_BYTE, NULL);-
179 funcs->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);-
180 funcs->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);-
181 funcs->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);-
182 funcs->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);-
183 m_filterMode = Nearest;-
184 funcs->glBindTexture(GL_TEXTURE_2D, 0);-
185 funcs->glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,-
186 GL_TEXTURE_2D, tmp_texture, 0);-
187-
188 funcs->glActiveTexture(GL_TEXTURE0 + QT_IMAGE_TEXTURE_UNIT);-
189 funcs->glBindTexture(GL_TEXTURE_2D, oldTexture);-
190-
191 if (pex != 0)
pex != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
192 pex->transferMode(BrushDrawingMode);
never executed: pex->transferMode(BrushDrawingMode);
0
193-
194 funcs->glDisable(GL_STENCIL_TEST);-
195 funcs->glDisable(GL_DEPTH_TEST);-
196 funcs->glDisable(GL_SCISSOR_TEST);-
197 funcs->glDisable(GL_BLEND);-
198-
199 funcs->glViewport(0, 0, oldWidth, oldHeight);-
200-
201 QGLShaderProgram *blitProgram = 0;-
202 if (pex == 0) {
pex == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
203 if (m_blitProgram == 0) {
m_blitProgram == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
204 m_blitProgram = new QGLShaderProgram(ctx);-
205-
206 {-
207 QString source;-
208 source.append(QLatin1String(qglslMainWithTexCoordsVertexShader));-
209 source.append(QLatin1String(qglslUntransformedPositionVertexShader));-
210-
211 QGLShader *vertexShader = new QGLShader(QGLShader::Vertex, m_blitProgram);-
212 vertexShader->compileSourceCode(source);-
213-
214 m_blitProgram->addShader(vertexShader);-
215 }-
216-
217 {-
218 QString source;-
219 source.append(QLatin1String(qglslMainFragmentShader));-
220 source.append(QLatin1String(qglslImageSrcFragmentShader));-
221-
222 QGLShader *fragmentShader = new QGLShader(QGLShader::Fragment, m_blitProgram);-
223 fragmentShader->compileSourceCode(source);-
224-
225 m_blitProgram->addShader(fragmentShader);-
226 }-
227-
228 m_blitProgram->bindAttributeLocation("vertexCoordsArray", QT_VERTEX_COORDS_ATTR);-
229 m_blitProgram->bindAttributeLocation("textureCoordArray", QT_TEXTURE_COORDS_ATTR);-
230-
231 m_blitProgram->link();-
232 }
never executed: end of block
0
233-
234 funcs->glVertexAttribPointer(QT_VERTEX_COORDS_ATTR, 2, GL_FLOAT, GL_FALSE, 0, m_vertexCoordinateArray);-
235 funcs->glVertexAttribPointer(QT_TEXTURE_COORDS_ATTR, 2, GL_FLOAT, GL_FALSE, 0, m_textureCoordinateArray);-
236-
237 m_blitProgram->bind();-
238 m_blitProgram->enableAttributeArray(int(QT_VERTEX_COORDS_ATTR));-
239 m_blitProgram->enableAttributeArray(int(QT_TEXTURE_COORDS_ATTR));-
240 m_blitProgram->disableAttributeArray(int(QT_OPACITY_ATTR));-
241-
242 blitProgram = m_blitProgram;-
243-
244 } else {
never executed: end of block
0
245 pex->setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, m_vertexCoordinateArray);-
246 pex->setVertexAttributePointer(QT_TEXTURE_COORDS_ATTR, m_textureCoordinateArray);-
247-
248 pex->shaderManager->useBlitProgram();-
249 blitProgram = pex->shaderManager->blitProgram();-
250 }
never executed: end of block
0
251-
252 blitProgram->setUniformValue("imageTexture", QT_IMAGE_TEXTURE_UNIT);-
253-
254 funcs->glDrawArrays(GL_TRIANGLE_FAN, 0, 4);-
255-
256 funcs->glBindTexture(GL_TEXTURE_2D, m_textureResource->m_texture);-
257-
258 funcs->glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, oldWidth, oldHeight);-
259-
260 funcs->glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,-
261 GL_RENDERBUFFER, 0);-
262 funcs->glDeleteTextures(1, &tmp_texture);-
263 funcs->glDeleteTextures(1, &oldTexture);-
264-
265 funcs->glBindFramebuffer(GL_FRAMEBUFFER, ctx->d_ptr->current_fbo);-
266-
267 if (pex != 0) {
pex != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
268 funcs->glViewport(0, 0, pex->width, pex->height);-
269 pex->updateClipScissorTest();-
270 }
never executed: end of block
0
271}
never executed: end of block
0
272-
273void QGLTextureGlyphCache::fillTexture(const Coord &c, glyph_t glyph, QFixed subPixelPosition)-
274{-
275 QGLContext *ctx = const_cast<QGLContext *>(QGLContext::currentContext());-
276 if (ctx == 0) {
ctx == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
277 qWarning("QGLTextureGlyphCache::fillTexture: Called with no context");-
278 return;
never executed: return;
0
279 }-
280 QOpenGLFunctions *funcs = ctx->contextHandle()->functions();-
281-
282 if (!QGLFramebufferObject::hasOpenGLFramebufferObjects() || ctx->d_ptr->workaround_brokenFBOReadBack) {
!QGLFramebuffe...ufferObjects()Description
TRUEnever evaluated
FALSEnever evaluated
ctx->d_ptr->wo...kenFBOReadBackDescription
TRUEnever evaluated
FALSEnever evaluated
0
283 QImageTextureGlyphCache::fillTexture(c, glyph, subPixelPosition);-
284-
285 funcs->glBindTexture(GL_TEXTURE_2D, m_textureResource->m_texture);-
286 const QImage &texture = image();-
287 const uchar *bits = texture.constBits();-
288 bits += c.y * texture.bytesPerLine() + c.x;-
289 for (int i=0; i<c.h; ++i) {
i<c.hDescription
TRUEnever evaluated
FALSEnever evaluated
0
290 funcs->glTexSubImage2D(GL_TEXTURE_2D, 0, c.x, c.y + i, c.w, 1, GL_ALPHA, GL_UNSIGNED_BYTE, bits);-
291 bits += texture.bytesPerLine();-
292 }
never executed: end of block
0
293 return;
never executed: return;
0
294 }-
295-
296 QImage mask = textureMapForGlyph(glyph, subPixelPosition);-
297 const int maskWidth = mask.width();-
298 const int maskHeight = mask.height();-
299-
300 if (mask.format() == QImage::Format_Mono) {
mask.format() ...e::Format_MonoDescription
TRUEnever evaluated
FALSEnever evaluated
0
301 mask = mask.convertToFormat(QImage::Format_Indexed8);-
302 for (int y = 0; y < maskHeight; ++y) {
y < maskHeightDescription
TRUEnever evaluated
FALSEnever evaluated
0
303 uchar *src = (uchar *) mask.scanLine(y);-
304 for (int x = 0; x < maskWidth; ++x)
x < maskWidthDescription
TRUEnever evaluated
FALSEnever evaluated
0
305 src[x] = -src[x]; // convert 0 and 1 into 0 and 255
never executed: src[x] = -src[x];
0
306 }
never executed: end of block
0
307 } else if (mask.depth() == 32) {
never executed: end of block
mask.depth() == 32Description
TRUEnever evaluated
FALSEnever evaluated
0
308 // Make the alpha component equal to the average of the RGB values.-
309 // This is needed when drawing sub-pixel antialiased text on translucent targets.-
310 for (int y = 0; y < maskHeight; ++y) {
y < maskHeightDescription
TRUEnever evaluated
FALSEnever evaluated
0
311 quint32 *src = (quint32 *) mask.scanLine(y);-
312 for (int x = 0; x < maskWidth; ++x) {
x < maskWidthDescription
TRUEnever evaluated
FALSEnever evaluated
0
313 int r = qRed(src[x]);-
314 int g = qGreen(src[x]);-
315 int b = qBlue(src[x]);-
316 int avg;-
317 if (mask.format() == QImage::Format_RGB32)
mask.format() ...::Format_RGB32Description
TRUEnever evaluated
FALSEnever evaluated
0
318 avg = (r + g + b + 1) / 3; // "+1" for rounding.
never executed: avg = (r + g + b + 1) / 3;
0
319 else // Format_ARGB_Premultiplied-
320 avg = qAlpha(src[x]);
never executed: avg = qAlpha(src[x]);
0
321 if (ctx->contextHandle()->isOpenGLES()) {
ctx->contextHa...->isOpenGLES()Description
TRUEnever evaluated
FALSEnever evaluated
0
322 // swizzle the bits to accommodate for the GL_RGBA upload.-
323 src[x] = (avg << 24) | (r << 0) | (g << 8) | (b << 16);-
324 } else {
never executed: end of block
0
325 src[x] = (src[x] & 0x00ffffff) | (avg << 24);-
326 }
never executed: end of block
0
327 }-
328 }
never executed: end of block
0
329 }
never executed: end of block
0
330-
331 funcs->glBindTexture(GL_TEXTURE_2D, m_textureResource->m_texture);-
332 if (mask.depth() == 32) {
mask.depth() == 32Description
TRUEnever evaluated
FALSEnever evaluated
0
333 GLenum format = GL_RGBA;-
334#if !defined(QT_OPENGL_ES_2)-
335 if (!ctx->contextHandle()->isOpenGLES())
!ctx->contextH...->isOpenGLES()Description
TRUEnever evaluated
FALSEnever evaluated
0
336 format = GL_BGRA;
never executed: format = 0x80E1;
0
337#endif-
338 funcs->glTexSubImage2D(GL_TEXTURE_2D, 0, c.x, c.y, maskWidth, maskHeight, format, GL_UNSIGNED_BYTE, mask.bits());-
339 } else {
never executed: end of block
0
340 // glTexSubImage2D() might cause some garbage to appear in the texture if the mask width is-
341 // not a multiple of four bytes. The bug appeared on a computer with 32-bit Windows Vista-
342 // and nVidia GeForce 8500GT. GL_UNPACK_ALIGNMENT is set to four bytes, 'mask' has a-
343 // multiple of four bytes per line, and most of the glyph shows up correctly in the-
344 // texture, which makes me think that this is a driver bug.-
345 // One workaround is to make sure the mask width is a multiple of four bytes, for instance-
346 // by converting it to a format with four bytes per pixel. Another is to copy one line at a-
347 // time.-
348-
349 if (!ctx->d_ptr->workaround_brokenAlphaTexSubImage_init) {
!ctx->d_ptr->w...xSubImage_initDescription
TRUEnever evaluated
FALSEnever evaluated
0
350 // don't know which driver versions exhibit this bug, so be conservative for now-
351 const QByteArray vendorString(reinterpret_cast<const char*>(funcs->glGetString(GL_VENDOR)));-
352 ctx->d_ptr->workaround_brokenAlphaTexSubImage = vendorString.indexOf("NVIDIA") >= 0;-
353 ctx->d_ptr->workaround_brokenAlphaTexSubImage_init = true;-
354 }
never executed: end of block
0
355-
356 if (ctx->d_ptr->workaround_brokenAlphaTexSubImage) {
ctx->d_ptr->wo...phaTexSubImageDescription
TRUEnever evaluated
FALSEnever evaluated
0
357 for (int i = 0; i < maskHeight; ++i)
i < maskHeightDescription
TRUEnever evaluated
FALSEnever evaluated
0
358 funcs->glTexSubImage2D(GL_TEXTURE_2D, 0, c.x, c.y + i, maskWidth, 1, GL_ALPHA, GL_UNSIGNED_BYTE, mask.scanLine(i));
never executed: funcs->glTexSubImage2D(0x0DE1, 0, c.x, c.y + i, maskWidth, 1, 0x1906, 0x1401, mask.scanLine(i));
0
359 } else {
never executed: end of block
0
360 funcs->glTexSubImage2D(GL_TEXTURE_2D, 0, c.x, c.y, maskWidth, maskHeight, GL_ALPHA, GL_UNSIGNED_BYTE, mask.bits());-
361 }
never executed: end of block
0
362 }-
363}-
364-
365int QGLTextureGlyphCache::glyphPadding() const-
366{-
367 return 1;
never executed: return 1;
0
368}-
369-
370int QGLTextureGlyphCache::maxTextureWidth() const-
371{-
372 QGLContext *ctx = const_cast<QGLContext *>(QGLContext::currentContext());-
373 if (ctx == 0)
ctx == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
374 return QImageTextureGlyphCache::maxTextureWidth();
never executed: return QImageTextureGlyphCache::maxTextureWidth();
0
375 else-
376 return ctx->d_ptr->maxTextureSize();
never executed: return ctx->d_ptr->maxTextureSize();
0
377}-
378-
379int QGLTextureGlyphCache::maxTextureHeight() const-
380{-
381 QGLContext *ctx = const_cast<QGLContext *>(QGLContext::currentContext());-
382 if (ctx == 0)
ctx == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
383 return QImageTextureGlyphCache::maxTextureHeight();
never executed: return QImageTextureGlyphCache::maxTextureHeight();
0
384-
385 if (ctx->d_ptr->workaround_brokenTexSubImage)
ctx->d_ptr->wo...kenTexSubImageDescription
TRUEnever evaluated
FALSEnever evaluated
0
386 return qMin(1024, ctx->d_ptr->maxTextureSize());
never executed: return qMin(1024, ctx->d_ptr->maxTextureSize());
0
387 else-
388 return ctx->d_ptr->maxTextureSize();
never executed: return ctx->d_ptr->maxTextureSize();
0
389}-
390-
391void QGLTextureGlyphCache::clear()-
392{-
393 m_textureResource->free();-
394 m_textureResource = 0;-
395-
396 m_w = 0;-
397 m_h = 0;-
398 m_cx = 0;-
399 m_cy = 0;-
400 m_currentRowHeight = 0;-
401 coords.clear();-
402}
never executed: end of block
0
403-
404QT_END_NAMESPACE-
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