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#include "qsgeglfsthreadedtexturemanager.h"
#include <QThread>
#include <qdatetime.h>
#include <EGL/egl.h>
#include <GLES2/gl2.h>
class QSGEglFSThreadedTextureManagerPrivate
{
public:
EGLDisplay display;
EGLSurface surface;
EGLContext context;
bool uploadsScanlines;
};
QSGEglFSThreadedTextureManager::QSGEglFSThreadedTextureManager()
: d(new QSGEglFSThreadedTextureManagerPrivate)
{
d->uploadsScanlines = false;
}
void QSGEglFSThreadedTextureManager::setUploadsScanlines(bool b)
{
d->uploadsScanlines = b;
}
bool QSGEglFSThreadedTextureManager::uploadsScanlines() const
{
return d->uploadsScanlines;
}
void QSGEglFSThreadedTextureManager::initializeThreadContext()
{
d->display = eglGetCurrentDisplay();
EGLint attribs[] = {
EGL_WIDTH, 8,
EGL_HEIGHT, 8,
EGL_NONE
};
EGLConfig configs[256];
EGLint count;
d->surface = 0;
EGLConfig *config = 0;
if (eglGetConfigs(d->display, configs, 256, &count)) {
for (int i=0; i<count; ++i) {
int type;
eglGetConfigAttrib(d->display, configs[i], EGL_RENDERABLE_TYPE, &type);
if (!(type & EGL_OPENGL_ES2_BIT))
continue;
int r, g, b, a;
eglGetConfigAttrib(d->display, configs[i], EGL_RED_SIZE, &r);
eglGetConfigAttrib(d->display, configs[i], EGL_GREEN_SIZE, &g);
eglGetConfigAttrib(d->display, configs[i], EGL_BLUE_SIZE, &b);
eglGetConfigAttrib(d->display, configs[i], EGL_ALPHA_SIZE, &a);
if ((r & g & b & a) == 8) {
d->surface = eglCreatePbufferSurface(d->display, configs[i], attribs);
config = configs + i;
break;
}
}
}
d->context = eglCreateContext(d->display, *config, eglGetCurrentContext(), 0);
}
void QSGEglFSThreadedTextureManager::makeThreadContextCurrent()
{
eglMakeCurrent(d->display, d->surface, d->surface, d->context);
}
class ThreadAccess : public QThread
{
public:
static void doSleep(int us) {
usleep(us);
}
};
static inline void qgl_byteSwapImage(QImage &img)
{
const int width = img.width();
const int height = img.height();
for (int i = 0; i < height; ++i) {
uint *p = (uint *) img.scanLine(i);
for (int x = 0; x < width; ++x)
p[x] = ((p[x] << 16) & 0xff0000) | ((p[x] >> 16) & 0xff) | (p[x] & 0xff00ff00);
}
}
#define DO_TIMING
void QSGEglFSThreadedTextureManager::uploadInThread(TextureReference *texture, const QImage &im, UploadHints hints)
{
while (glGetError() != GL_NO_ERROR) printf("bust...\n");
#ifdef DO_TIMING
QTime time;
time.start();
#endif
QImage image = im;
qgl_byteSwapImage(image);
#ifdef DO_TIMING
int time_byteswap = time.elapsed();
#endif
int w = image.width();
int h = image.height();
int bpl = image.bytesPerLine();
const uchar *bits = image.constBits();
// This should not be neccesary...
if (d->uploadsScanlines)
makeThreadContextCurrent();
GLuint id;
glGenTextures(1, &id);
glBindTexture(GL_TEXTURE_2D, id);
if (d->uploadsScanlines) {
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
glBindTexture(GL_TEXTURE_2D, id); // Should also not be required, but it fails without... driver bug, for sure..
for (int y=0; y<h; ++y) {
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, y, w, 1, GL_RGBA, GL_UNSIGNED_BYTE, y * bpl + bits);
if (glGetError() != GL_NO_ERROR) {
qWarning("ERROR: failed to upload chunk...\n");
break;
}
ThreadAccess::doSleep(2);
}
} else {
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, bits);
}
glBindTexture(GL_TEXTURE_2D, 0);
#ifdef DO_TIMING
int time_upload = time.elapsed();
printf("EGLFS Threaded upload: byteSwap: %d ms, upload: %d ms\n",
time_byteswap,
time_upload);
#endif
texture->setOwnsTexture(true);
texture->setTextureId(id);
texture->setTextureSize(image.size());
texture->setMipmaps(hints & TextureManager::GenerateMipmapUploadHint);
texture->setStatus(TextureReference::Uploaded);
}
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