void StelQGLTextureBackend::loadFromPVR()
{
invariant();
//NOTE: We ignore bind options (mipmapping and filtering type) from params
// at the moment.
//
// We also ignore maximum texture size (QGLContext::bindTexture should
// fail if the texture is too large.
//
// QGLContext::bindTexture handles gl texture format for us.
QGLContext* context = prepareContextForLoading();
glTextureID = context->bindTexture(path);
if(glTextureID == 0)
{
errorOccured("loadFromPVR() failed to load a PVR file to a GL texture - "
"Maybe the file \"" + path + "\" is missing?");
invariant();
return;
}
// For some reason only LINEAR seems to work.
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
setTextureWrapping();
// This is an assumption; PVRTC can be either 4 or 2 bits per pixel - we assume the worse case.
pixelBytes = 0.5f;
completeLoading();
invariant();
}
bool Texture::load( const QUrl& url )
{
#ifdef __GNUC__
#warning Todo: Add support for non-2D textures and non-RGBA colour formats. Also, find a way \
around the nasty const_cast .
#endif
if( d->glTexture )
return true;
if( !QGLContext::currentContext() || !QGLContext::currentContext()->isValid() )
return false;
QImage image;
image.load( url.toLocalFile() );
QGLContext* context = const_cast<QGLContext*>( QGLContext::currentContext() );
d->glTexture = context->bindTexture( image );
glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
#ifndef GLUON_GRAPHICS_GLES
glTexParameterf( GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_FALSE );
#endif
if( d->glTexture != 0 )
return true;
return false;
}
void CButton::loadTextures(const char *normalTex, const char *selectedTex, const char *pressedTex)
{
QGLContext *context = const_cast<QGLContext*>(QGLContext::currentContext());
QImage img;
img.load(normalTex);
normalId=context->bindTexture(img);
img.load(selectedTex);
selectedId=context->bindTexture(img);
img.load(pressedTex);
pressedId=context->bindTexture(img);
setWindowSize( img.width(), img.height() );
}
void CTexture::loadFromFile(const char *fileName)
{
QGLContext *context = const_cast<QGLContext*>(QGLContext::currentContext());
QImage img;
img.load(fileName);
id=context->bindTexture(img);
width = img.width();
height = img.height();
}
void HostWindowDataOpenGL::initializePixmap(QPixmap& screenPixmap)
{
QGLContext* gc = (QGLContext*) QGLContext::currentContext();
if (gc) {
if (m_textureId)
gc->deleteTexture(m_textureId);
screenPixmap = QPixmap(m_width, m_height);
screenPixmap.fill(QColor(255,255,255,0));
m_textureId = gc->bindTexture(screenPixmap, GL_TEXTURE_2D, kGLInternalFormat,
QGLContext::PremultipliedAlphaBindOption);
}
m_dirty = true;
}
//Image struct is copied (data is not - implicit sharing), so that
//ensureTextureSizeWithinLimits won't affect the original image.
void StelQGLTextureBackend::loadFromImage(QImage image)
{
invariant();
if(image.isNull())
{
errorOccured("loadFromImage(): Image data to load from is null. "
"Maybe the image failed to load from file?");
invariant();
return;
}
// Shrink if needed.
glEnsureTextureSizeWithinLimits(image);
if(!renderer->areNonPowerOfTwoTexturesSupported() &&
(!StelUtils::isPowerOfTwo(image.width()) ||
!StelUtils::isPowerOfTwo(image.height())))
{
errorOccured("loadFromImage(): Failed to load because the image has "
"non-power-of-two width and/or height while the renderer "
"backend only supports power-of-two dimensions");
invariant();
return;
}
GLint internalFormat = glGetTextureInternalFormat(image);
switch(internalFormat)
{
case GL_RGBA8: pixelBytes = 4.0f; break;
case GL_RGB8: pixelBytes = 3.0f; break;
case GL_LUMINANCE8_ALPHA8: pixelBytes = 2.0f; break;
case GL_LUMINANCE8: pixelBytes = 1.0f; break;
default: Q_ASSERT_X(false, Q_FUNC_INFO, "Unknown GL internal format for QImage");
}
QGLContext* context = prepareContextForLoading();
glTextureID = context->bindTexture(image, GL_TEXTURE_2D, internalFormat,
getTextureBindOptions(textureParams));
if(glTextureID == 0)
{
errorOccured("loadFromImage(): Failed to load an image to a GL texture");
invariant();
return;
}
setTextureWrapping();
completeLoading();
invariant();
}
void CWater::initializeGL()
{
noise.gen(time(NULL));
water_shader.addShaderFromSourceFile(QGLShader::Vertex,":/shaders/water.vert");
water_shader.addShaderFromSourceFile(QGLShader::Fragment,":/shaders/water.frag");
water_shader.link();
water_shader.bind();
water_shader.setUniformValue("sky_map",0);
water_shader.setUniformValue("noise_table",1);
water_shader.release();
QImage img("tex/sky.jpg");
QGLContext *context = const_cast<QGLContext*>(QGLContext::currentContext());
sky_tex=context->bindTexture(img);
}
QPixmap* HostWindowDataOpenGL::acquirePixmap(QPixmap& screenPixmap)
{
if (m_dirty) {
m_dirty = false;
m_ipcBuffer->lock();
QGLContext* gc = (QGLContext*) QGLContext::currentContext();
if (gc) {
QImage data((uchar*) m_ipcBuffer->data(), m_width, m_height, QImage::Format_ARGB32_Premultiplied);
screenPixmap = QPixmap::fromImage(data);
// FIXME: is it really necessary to bind it here? Qt will bind it through
// QGL2PaintEngineEx::drawPixmap -> QGLContextPrivate::bindTexture anyways
m_textureId = gc->bindTexture(screenPixmap, GL_TEXTURE_2D, kGLInternalFormat,
QGLContext::PremultipliedAlphaBindOption);
}
m_ipcBuffer->unlock();
}
return &screenPixmap;
}
static PyObject *meth_QGLContext_bindTexture(PyObject *sipSelf, PyObject *sipArgs, PyObject *sipKwds)
{
PyObject *sipParseErr = NULL;
{
const QImage* a0;
GLenum a1 = GL_TEXTURE_2D;
GLint a2 = GL_RGBA;
QGLContext *sipCpp;
static const char *sipKwdList[] = {
NULL,
sipName_target,
sipName_format,
};
if (sipParseKwdArgs(&sipParseErr, sipArgs, sipKwds, sipKwdList, NULL, "BJ9|ui", &sipSelf, sipType_QGLContext, &sipCpp, sipType_QImage, &a0, &a1, &a2))
{
GLuint sipRes;
sipRes = sipCpp->bindTexture(*a0,a1,a2);
return PyLong_FromUnsignedLong(sipRes);
}
}
{
const QPixmap* a0;
GLenum a1 = GL_TEXTURE_2D;
GLint a2 = GL_RGBA;
QGLContext *sipCpp;
static const char *sipKwdList[] = {
NULL,
sipName_target,
sipName_format,
};
if (sipParseKwdArgs(&sipParseErr, sipArgs, sipKwds, sipKwdList, NULL, "BJ9|ui", &sipSelf, sipType_QGLContext, &sipCpp, sipType_QPixmap, &a0, &a1, &a2))
{
GLuint sipRes;
sipRes = sipCpp->bindTexture(*a0,a1,a2);
return PyLong_FromUnsignedLong(sipRes);
}
}
{
const QString* a0;
int a0State = 0;
QGLContext *sipCpp;
if (sipParseKwdArgs(&sipParseErr, sipArgs, sipKwds, NULL, NULL, "BJ1", &sipSelf, sipType_QGLContext, &sipCpp, sipType_QString,&a0, &a0State))
{
GLuint sipRes;
sipRes = sipCpp->bindTexture(*a0);
sipReleaseType(const_cast<QString *>(a0),sipType_QString,a0State);
return PyLong_FromUnsignedLong(sipRes);
}
}
{
const QImage* a0;
GLenum a1;
GLint a2;
QGLContext::BindOptions* a3;
int a3State = 0;
QGLContext *sipCpp;
if (sipParseKwdArgs(&sipParseErr, sipArgs, sipKwds, NULL, NULL, "BJ9uiJ1", &sipSelf, sipType_QGLContext, &sipCpp, sipType_QImage, &a0, &a1, &a2, sipType_QGLContext_BindOptions, &a3, &a3State))
{
GLuint sipRes;
sipRes = sipCpp->bindTexture(*a0,a1,a2,*a3);
sipReleaseType(a3,sipType_QGLContext_BindOptions,a3State);
return PyLong_FromUnsignedLong(sipRes);
}
}
{
const QPixmap* a0;
GLenum a1;
GLint a2;
QGLContext::BindOptions* a3;
int a3State = 0;
QGLContext *sipCpp;
if (sipParseKwdArgs(&sipParseErr, sipArgs, sipKwds, NULL, NULL, "BJ9uiJ1", &sipSelf, sipType_QGLContext, &sipCpp, sipType_QPixmap, &a0, &a1, &a2, sipType_QGLContext_BindOptions, &a3, &a3State))
{
GLuint sipRes;
sipRes = sipCpp->bindTexture(*a0,a1,a2,*a3);
sipReleaseType(a3,sipType_QGLContext_BindOptions,a3State);
return PyLong_FromUnsignedLong(sipRes);
}
}
/* Raise an exception if the arguments couldn't be parsed. */
sipNoMethod(sipParseErr, sipName_QGLContext, sipName_bindTexture, doc_QGLContext_bindTexture);
return NULL;
}
StelQGLTextureBackend* StelQGLTextureBackend::fromViewport
(StelQGLRenderer* renderer, const QSize viewportSize, const QGLFormat& viewportFormat)
{
// This function should only be used as a fallback for when FBOs aren't supported.
const int r = viewportFormat.redBufferSize();
const int g = viewportFormat.greenBufferSize();
const int b = viewportFormat.blueBufferSize();
const int a = viewportFormat.alpha() ? viewportFormat.alphaBufferSize() : 0;
// Creating a texture from a dummy image.
QImage dummyImage(64, 64, QImage::Format_Mono);
const TextureParams params = TextureParams();
StelQGLTextureBackend* result =
new StelQGLTextureBackend(renderer, QString(), params);
// Get image and GL pixel format matching viewport format.
int glFormat;
if(r == 8 && g == 8 && b == 8 && a == 8)
{
glFormat = GL_RGBA8;
result->pixelBytes = 4.0f;
}
else if(r == 8 && g == 8 && b == 8 && a == 0)
{
glFormat = GL_RGB8;
result->pixelBytes = 3.0f;
}
else if(r == 5 && g == 6 && b == 5 && a == 0)
{
glFormat = GL_RGB5;
result->pixelBytes = 2.0f;
}
else
{
// This is extremely unlikely, but we can't rule it out.
Q_ASSERT_X(false, Q_FUNC_INFO,
"Unknown screen vertex format when getting texture from viewport. "
"Switching to OpenGL2, disabling viewport effects or "
"chaning video mode bit depth might help");
// Invalid value to avoid warnings.
glFormat = -1;
}
QGLContext* context = result->prepareContextForLoading();
const GLuint glTextureID =
context->bindTexture(dummyImage, GL_TEXTURE_2D, glFormat,
getTextureBindOptions(params));
// Need a power-of-two texture (as this is used mainly with GL1)
const QSize size =
StelUtils::smallestPowerOfTwoSizeGreaterOrEqualTo(viewportSize);
// Set viewport so it matches the size of the texture
glViewport(0, 0, size.width(), size.height());
// Copy viewport to texture (this overrides texture size - we must use POT for GL1)
glCopyTexImage2D(GL_TEXTURE_2D, 0, glFormat, 0, 0, size.width(), size.height(), 0);
// Restore viewport
glViewport(0, 0, viewportSize.width(), viewportSize.height());
// Will need change if different screen bit depths are ever supported
renderer->getStatistics()[ESTIMATED_TEXTURE_MEMORY]
+= size.width() * size.height() * result->pixelBytes;
result->startedLoading();
result->glTextureID = glTextureID;
result->finishedLoading(size);
return result;
}
