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Avoid format conversion in backing store texture upload

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Use glPixelStorei where possible

Fixes: QTBUG-84189
Change-Id: Iadf039b5c6d8e7b6bb11d031a94683343dee0dc6
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
(cherry picked from commit 01b2ea83aa0e8e1d624f6c25d78bb5184cd35483)
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
This commit is contained in:
Allan Sandfeld Jensen 2020-05-13 11:35:35 +02:00
parent 5a1f9cf8c3
commit 2fbcca719e
1 changed files with 50 additions and 44 deletions
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94
src/gui/kernel/qplatformgraphicsbufferhelper.cpp
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@ -46,6 +46,10 @@
#include <QtGui/QOpenGLContext>
#include <QtGui/QOpenGLFunctions>
#ifndef GL_UNPACK_ROW_LENGTH
#define GL_UNPACK_ROW_LENGTH 0x0CF2
#endif
#ifndef GL_RGB10_A2
#define GL_RGB10_A2 0x8059
#endif
@ -161,66 +165,68 @@ bool QPlatformGraphicsBufferHelper::bindSWToTexture(const QPlatformGraphicsBuffe
bool premultiplied = false;
QImage::Format imageformat = QImage::toImageFormat(graphicsBuffer->format());
QImage image(graphicsBuffer->data(), size.width(), size.height(), graphicsBuffer->bytesPerLine(), imageformat);
if (graphicsBuffer->bytesPerLine() != (size.width() * 4)) {
needsConversion = true;
} else {
switch (imageformat) {
case QImage::Format_ARGB32_Premultiplied:
switch (imageformat) {
case QImage::Format_ARGB32_Premultiplied:
premultiplied = true;
Q_FALLTHROUGH();
case QImage::Format_RGB32:
case QImage::Format_ARGB32:
swizzle = true;
break;
case QImage::Format_RGBA8888_Premultiplied:
premultiplied = true;
Q_FALLTHROUGH();
case QImage::Format_RGBX8888:
case QImage::Format_RGBA8888:
break;
case QImage::Format_BGR30:
case QImage::Format_A2BGR30_Premultiplied:
if (!ctx->isOpenGLES() || ctx->format().majorVersion() >= 3) {
pixelType = GL_UNSIGNED_INT_2_10_10_10_REV;
internalFormat = GL_RGB10_A2;
premultiplied = true;
Q_FALLTHROUGH();
case QImage::Format_RGB32:
case QImage::Format_ARGB32:
swizzle = true;
break;
case QImage::Format_RGBA8888_Premultiplied:
premultiplied = true;
Q_FALLTHROUGH();
case QImage::Format_RGBX8888:
case QImage::Format_RGBA8888:
break;
case QImage::Format_BGR30:
case QImage::Format_A2BGR30_Premultiplied:
if (!ctx->isOpenGLES() || ctx->format().majorVersion() >= 3) {
pixelType = GL_UNSIGNED_INT_2_10_10_10_REV;
internalFormat = GL_RGB10_A2;
premultiplied = true;
} else {
needsConversion = true;
}
break;
case QImage::Format_RGB30:
case QImage::Format_A2RGB30_Premultiplied:
if (!ctx->isOpenGLES() || ctx->format().majorVersion() >= 3) {
pixelType = GL_UNSIGNED_INT_2_10_10_10_REV;
internalFormat = GL_RGB10_A2;
premultiplied = true;
swizzle = true;
} else {
needsConversion = true;
}
break;
default:
} else {
needsConversion = true;
break;
}
break;
case QImage::Format_RGB30:
case QImage::Format_A2RGB30_Premultiplied:
if (!ctx->isOpenGLES() || ctx->format().majorVersion() >= 3) {
pixelType = GL_UNSIGNED_INT_2_10_10_10_REV;
internalFormat = GL_RGB10_A2;
premultiplied = true;
swizzle = true;
} else {
needsConversion = true;
}
break;
default:
needsConversion = true;
break;
}
if (!needsConversion && image.bytesPerLine() != (size.width() * 4) && ctx->isOpenGLES() && ctx->format().majorVersion() < 3)
needsConversion = true;
if (needsConversion)
image = image.convertToFormat(QImage::Format_RGBA8888);
bool needsRowLength = (image.bytesPerLine() != image.width() * 4);
QOpenGLFunctions *funcs = ctx->functions();
QRect rect = subRect;
if (rect.isNull() || rect == QRect(QPoint(0,0),size)) {
if (needsRowLength)
funcs->glPixelStorei(GL_UNPACK_ROW_LENGTH, image.bytesPerLine() / 4);
funcs->glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, size.width(), size.height(), 0, GL_RGBA, pixelType, image.constBits());
if (needsRowLength)
funcs->glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
} else {
#ifndef QT_OPENGL_ES_2
if (!ctx->isOpenGLES()) {
funcs->glPixelStorei(GL_UNPACK_ROW_LENGTH, image.width());
if (!ctx->isOpenGLES() || ctx->format().majorVersion() >= 3) {
// OpenGL 2.1+ or OpenGL ES/3+
funcs->glPixelStorei(GL_UNPACK_ROW_LENGTH, image.bytesPerLine() / 4);
funcs->glTexSubImage2D(GL_TEXTURE_2D, 0, rect.x(), rect.y(), rect.width(), rect.height(), GL_RGBA, pixelType,
image.constScanLine(rect.y()) + rect.x() * 4);
funcs->glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
} else
#endif
{
// if the rect is wide enough it's cheaper to just
// extend it instead of doing an image copy
@ -232,7 +238,7 @@ bool QPlatformGraphicsBufferHelper::bindSWToTexture(const QPlatformGraphicsBuffe
// if the sub-rect is full-width we can pass the image data directly to
// OpenGL instead of copying, since there's no gap between scanlines
if (rect.width() == size.width()) {
if (rect.width() == image.bytesPerLine() / 4) {
funcs->glTexSubImage2D(GL_TEXTURE_2D, 0, 0, rect.y(), rect.width(), rect.height(), GL_RGBA, pixelType,
image.constScanLine(rect.y()));
} else {