summaryrefslogtreecommitdiffstats
path: root/src/opengl/qgl.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/opengl/qgl.cpp')
-rw-r--r--src/opengl/qgl.cpp175
1 files changed, 120 insertions, 55 deletions
diff --git a/src/opengl/qgl.cpp b/src/opengl/qgl.cpp
index d1cf35d..d74ed95 100644
--- a/src/opengl/qgl.cpp
+++ b/src/opengl/qgl.cpp
@@ -1331,13 +1331,21 @@ static void convertFromGLImage(QImage &img, int w, int h, bool alpha_format, boo
// This is an old legacy fix for PowerPC based Macs, which
// we shouldn't remove
while (p < end) {
- *p = 0xFF000000 | (*p>>8);
+ *p = 0xff000000 | (*p>>8);
++p;
}
}
} else {
// OpenGL gives ABGR (i.e. RGBA backwards); Qt wants ARGB
- img = img.rgbSwapped();
+ for (int y = 0; y < h; y++) {
+ uint *q = (uint*)img.scanLine(y);
+ for (int x=0; x < w; ++x) {
+ const uint pixel = *q;
+ *q = ((pixel << 16) & 0xff0000) | ((pixel >> 16) & 0xff) | (pixel & 0xff00ff00);
+ q++;
+ }
+ }
+
}
img = img.mirrored();
}
@@ -1700,58 +1708,105 @@ static void qt_gl_clean_cache(qint64 cacheKey)
static void convertToGLFormatHelper(QImage &dst, const QImage &img, GLenum texture_format)
{
- Q_ASSERT(dst.size() == img.size());
Q_ASSERT(dst.depth() == 32);
Q_ASSERT(img.depth() == 32);
- const int width = img.width();
- const int height = img.height();
- const uint *p = (const uint*) img.scanLine(img.height() - 1);
- uint *q = (uint*) dst.scanLine(0);
-
- if (texture_format == GL_BGRA) {
- if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {
- // mirror + swizzle
- for (int i=0; i < height; ++i) {
- const uint *end = p + width;
- while (p < end) {
- *q = ((*p << 24) & 0xff000000)
- | ((*p >> 24) & 0x000000ff)
- | ((*p << 8) & 0x00ff0000)
- | ((*p >> 8) & 0x0000ff00);
- p++;
- q++;
+ if (dst.size() != img.size()) {
+ int target_width = dst.width();
+ int target_height = dst.height();
+ qreal sx = target_width / qreal(img.width());
+ qreal sy = target_height / qreal(img.height());
+
+ quint32 *dest = (quint32 *) dst.scanLine(0); // NB! avoid detach here
+ uchar *srcPixels = (uchar *) img.scanLine(img.height() - 1);
+ int sbpl = img.bytesPerLine();
+ int dbpl = dst.bytesPerLine();
+
+ int ix = 0x00010000 / sx;
+ int iy = 0x00010000 / sy;
+
+ quint32 basex = int(0.5 * ix);
+ quint32 srcy = int(0.5 * iy);
+
+ // scale, swizzle and mirror in one loop
+ while (target_height--) {
+ const uint *src = (const quint32 *) (srcPixels - (srcy >> 16) * sbpl);
+ int srcx = basex;
+ for (int x=0; x<target_width; ++x) {
+ uint src_pixel = src[srcx >> 16];
+ if (texture_format == GL_BGRA) {
+ if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {
+ dest[x] = ((src_pixel << 24) & 0xff000000)
+ | ((src_pixel >> 24) & 0x000000ff)
+ | ((src_pixel << 8) & 0x00ff0000)
+ | ((src_pixel >> 8) & 0x0000ff00);
+ } else {
+ dest[x] = src_pixel;
+ }
+ } else { // GL_RGBA
+ if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {
+ dest[x] = (src_pixel << 8) | ((src_pixel >> 24) & 0xff);
+ } else {
+ dest[x] = ((src_pixel << 16) & 0xff0000)
+ | ((src_pixel >> 16) & 0xff)
+ | (src_pixel & 0xff00ff00);
+ }
}
- p -= 2 * width;
- }
- } else {
- const uint bytesPerLine = img.bytesPerLine();
- for (int i=0; i < height; ++i) {
- memcpy(q, p, bytesPerLine);
- q += width;
- p -= width;
+ srcx += ix;
}
+ dest = (quint32 *)(((uchar *) dest) + dbpl);
+ srcy += iy;
}
} else {
- if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {
- for (int i=0; i < height; ++i) {
- const uint *end = p + width;
- while (p < end) {
- *q = (*p << 8) | ((*p >> 24) & 0xFF);
- p++;
- q++;
+ const int width = img.width();
+ const int height = img.height();
+ const uint *p = (const uint*) img.scanLine(img.height() - 1);
+ uint *q = (uint*) dst.scanLine(0);
+
+ if (texture_format == GL_BGRA) {
+ if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {
+ // mirror + swizzle
+ for (int i=0; i < height; ++i) {
+ const uint *end = p + width;
+ while (p < end) {
+ *q = ((*p << 24) & 0xff000000)
+ | ((*p >> 24) & 0x000000ff)
+ | ((*p << 8) & 0x00ff0000)
+ | ((*p >> 8) & 0x0000ff00);
+ p++;
+ q++;
+ }
+ p -= 2 * width;
+ }
+ } else {
+ const uint bytesPerLine = img.bytesPerLine();
+ for (int i=0; i < height; ++i) {
+ memcpy(q, p, bytesPerLine);
+ q += width;
+ p -= width;
}
- p -= 2 * width;
}
} else {
- for (int i=0; i < height; ++i) {
- const uint *end = p + width;
- while (p < end) {
- *q = ((*p << 16) & 0xff0000) | ((*p >> 16) & 0xff) | (*p & 0xff00ff00);
- p++;
- q++;
+ if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {
+ for (int i=0; i < height; ++i) {
+ const uint *end = p + width;
+ while (p < end) {
+ *q = (*p << 8) | ((*p >> 24) & 0xff);
+ p++;
+ q++;
+ }
+ p -= 2 * width;
+ }
+ } else {
+ for (int i=0; i < height; ++i) {
+ const uint *end = p + width;
+ while (p < end) {
+ *q = ((*p << 16) & 0xff0000) | ((*p >> 16) & 0xff) | (*p & 0xff00ff00);
+ p++;
+ q++;
+ }
+ p -= 2 * width;
}
- p -= 2 * width;
}
}
}
@@ -1794,19 +1849,18 @@ GLuint QGLContextPrivate::bindTexture(const QImage &image, GLenum target, GLint
}
// Scale the pixmap if needed. GL textures needs to have the
- // dimensions 2^n+2(border) x 2^m+2(border).
+ // dimensions 2^n+2(border) x 2^m+2(border), unless we're using GL
+ // 2.0 or use the GL_TEXTURE_RECTANGLE texture target
int tx_w = qt_next_power_of_two(image.width());
int tx_h = qt_next_power_of_two(image.height());
+ bool scale = false;
- // Note: the clean param is only true when a texture is bound
- // from the QOpenGLPaintEngine - in that case we have to force
- // a premultiplied texture format
QImage img = image;
if (( !(QGLFormat::openGLVersionFlags() & QGLFormat::OpenGL_Version_2_0) &&
!(QGLFormat::openGLVersionFlags() & QGLFormat::OpenGL_ES_Version_2_0) )
&& (target == GL_TEXTURE_2D && (tx_w != image.width() || tx_h != image.height())))
{
- img = image.scaled(tx_w, tx_h);
+ scale = true;
}
GLuint tx_id;
@@ -1838,17 +1892,24 @@ GLuint QGLContextPrivate::bindTexture(const QImage &image, GLenum target, GLint
ptr = reinterpret_cast<uchar *>(glMapBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, GL_WRITE_ONLY_ARB));
}
- if (ptr) {
- QImage::Format target_format = img.format();
- if (clean || img.format() != QImage::Format_ARGB32)
- target_format = QImage::Format_ARGB32_Premultiplied;
+ QImage::Format target_format = img.format();
+ // Note: the clean param is only true when a texture is bound
+ // from the QOpenGLPaintEngine - in that case we have to force
+ // a premultiplied texture format
+ if (clean || img.format() != QImage::Format_ARGB32)
+ target_format = QImage::Format_ARGB32_Premultiplied;
+ if (img.format() != target_format)
+ img = img.convertToFormat(target_format);
+ if (ptr) {
QImage buffer(ptr, img.width(), img.height(), target_format);
- convertToGLFormatHelper(buffer, img.convertToFormat(target_format), texture_format);
+ convertToGLFormatHelper(buffer, img, texture_format);
glUnmapBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB);
- glTexImage2D(target, 0, format, img.width(), img.height(), 0, texture_format, GL_UNSIGNED_BYTE, 0);
+ glTexImage2D(target, 0, format, img.width(), img.height(), 0, texture_format,
+ GL_UNSIGNED_BYTE, 0);
} else {
- QImage tx = convertToGLFormat(img, clean, texture_format);
+ QImage tx(scale ? QSize(tx_w, tx_h) : img.size(), target_format);
+ convertToGLFormatHelper(tx, img, texture_format);
glTexImage2D(target, 0, format, tx.width(), tx.height(), 0, texture_format,
GL_UNSIGNED_BYTE, tx.bits());
}
@@ -2439,6 +2500,10 @@ bool QGLContext::create(const QGLContext* shareContext)
return false;
reset();
d->valid = chooseContext(shareContext);
+ if (d->valid && d->paintDevice->devType() == QInternal::Widget) {
+ QWidgetPrivate *wd = qt_widget_private(static_cast<QWidget *>(d->paintDevice));
+ wd->usesDoubleBufferedGLContext = d->glFormat.doubleBuffer();
+ }
if (d->sharing) // ok, we managed to share
qgl_share_reg()->addShare(this, shareContext);
return d->valid;
generated by cgit v0.12 at 2024-09-20 13:27:50 (GMT)