static void drawRegion(memvolume_t &volume, Rectanglei const &rect, size_t start,
size_t size, float const color[4])
{
DENG2_ASSERT(start + size <= volume.size);
int const bytesPerRow = (volume.size - sizeof(memzone_t)) / rect.height();
float const toPixelScale = (float)rect.width() / (float)bytesPerRow;
size_t const edge = rect.topLeft.x + rect.width();
int x = (start % bytesPerRow) * toPixelScale + rect.topLeft.x;
int y = start / bytesPerRow + rect.topLeft.y;
int pixels = de::max<dint>(1, std::ceil(size * toPixelScale));
while(pixels > 0)
{
int const availPixels = edge - x;
int const usedPixels = de::min(availPixels, pixels);
glColor4fv(color);
glVertex2i(x, y);
glVertex2i(x + usedPixels, y);
pixels -= usedPixels;
// Move to the next row.
y++;
x = rect.topLeft.x;
}
}
duint CanvasWindow::grabAsTexture(Rectanglei const &area, GrabMode mode) const
{
QSize size;
if(mode == GrabHalfSized)
{
size = QSize(area.width()/2, area.height()/2);
}
return d->canvas->grabAsTexture(
QRect(area.left(), area.top(), area.width(), area.height()), size);
}
QImage QtNativeFont::nativeFontRasterize(String const &text,
Vector4ub const &foreground,
Vector4ub const &background) const
{
#ifdef LIBGUI_ACCURATE_TEXT_BOUNDS
Rectanglei const bounds = measure(text);
#else
Rectanglei const bounds(Vector2i(0, -d->metrics->ascent()),
Vector2i(d->metrics->width(text),
d->metrics->descent()));
#endif
QColor const fgColor(foreground.x, foreground.y, foreground.z, foreground.w);
QColor const bgColor(background.x, background.y, background.z, background.w);
QImage img(QSize(bounds.width() + 1, bounds.height() + 1),
QImage::Format_ARGB32);
img.fill(bgColor.rgba());
QPainter painter(&img);
painter.setCompositionMode(QPainter::CompositionMode_Source);
painter.setFont(d->font);
painter.setPen(fgColor);
painter.setBrush(bgColor);
painter.drawText(-bounds.left(), -bounds.top(), text);
return img;
}
void BoundTexture2d::update_data(const Rectanglei& update_region,
Texture::DataPixelFormat data_format, Texture::PixelType pixel_type, const void* data)
{
glTexSubImage2D(GL_TEXTURE_2D, 0, update_region.left(), update_region.bottom(),
update_region.width(), update_region.height(), static_cast<GLenum>(data_format),
static_cast<GLenum>(pixel_type), data);
CHECK_GL_ERROR(glTexSubImage2D);
}
Rectanglei QtNativeFont::nativeFontMeasure(String const &text) const
{
Rectanglei rect = Rectanglei::fromQRect(d->metrics->boundingRect(text));
if(rect.height() == 0)
{
// It seems measuring the bounds of a Tab character produces
// strange results (position 100000?).
rect = Rectanglei(0, 0, rect.width(), 0);
}
return rect;
}
void glSubImage(int level, Rectanglei const &rect, Image const &image,
CubeFace face = PositiveX)
{
auto const &glFormat = image.glFormat();
LIBGUI_GL.glPixelStorei(GL_UNPACK_ALIGNMENT, GLint(glFormat.rowAlignment));
LIBGUI_GL.glPixelStorei(GL_UNPACK_ROW_LENGTH, GLint(image.width()));
int const bytesPerPixel = image.depth() / 8;
LIBGUI_GL.glTexSubImage2D(isCube()? glFace(face) : texTarget,
level, rect.left(), rect.top(), rect.width(), rect.height(),
glFormat.format, glFormat.type,
static_cast<dbyte const *>(image.bits()) +
bytesPerPixel * rect.left() + image.stride() * rect.top());
LIBGUI_GL.glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
LIBGUI_ASSERT_GL_OK();
}
/**
* Submits the image to the backing store, or commits it if no backing
* store is available.
*
* @param image Image.
* @param rect Rectangle for the image determined by an IAllocator.
*/
void submitImage(Image const &image, Rectanglei const &rect)
{
Rectanglei const noBorders = rect.shrunk(border);
Rectanglei const withMargin = rect.expanded(margin);
if (hasBacking())
{
// The margin is cleared to transparent black.
backing.fill(withMargin, Image::Color(0, 0, 0, 0));
if (border > 0)
{
if (flags.testFlag(WrapBordersInBackingStore))
{
// Wrap using the source image (left, right, top, bottom edges).
backing.drawPartial(image, Rectanglei(0, 0, border, image.height()),
rect.topRight() + Vector2i(-border, border));
backing.drawPartial(image, Rectanglei(image.width() - border, 0,
border, image.height()),
rect.topLeft + Vector2i(0, border));
backing.drawPartial(image, Rectanglei(0, 0, image.width(), border),
rect.bottomLeft() + Vector2i(border, -border));
backing.drawPartial(image, Rectanglei(0, image.height() - border,
image.width(), border),
rect.topLeft + Vector2i(border, 0));
}
}
backing.draw(image, noBorders.topLeft);
//backing.toQImage().save(QString("backing-%1.png").arg(uint64_t(this)));
markAsChanged(rect);
}
else
{
// No backing, must commit immediately.
if (border > 0)
{
// Expand with borders (repeat edges).
QImage const srcImg = image.toQImage();
int const sw = srcImg.width();
int const sh = srcImg.height();
QImage bordered(QSize(rect.width(), rect.height()), srcImg.format());
int const w = bordered.width();
int const h = bordered.height();
QPainter painter(&bordered);
painter.setCompositionMode(QPainter::CompositionMode_Source);
painter.fillRect(bordered.rect(), QColor(0, 0, 0, 0));
/// @todo This really only works for a border of 1 pixels. Should
/// repeat the same outmost edge pixels for every border. -jk
painter.drawImage(border, border, srcImg);
painter.drawImage(border, 0, srcImg, 0, 0, sw, 1); // top
painter.drawImage(border, h - 1, srcImg, 0, sh - 1, sw, 1); // bottom
painter.drawImage(0, border, srcImg, 0, 0, 1, sh); // left
painter.drawImage(w - 1, border, srcImg, sw - 1, 0, 1, sh); // right
// Corners.
painter.drawImage(0, 0, srcImg, 0, 0, 1, 1);
painter.drawImage(w - 1, 0, srcImg, sw - 1, 0, 1, 1);
painter.drawImage(0, h - 1, srcImg, 0, sh - 1, 1, 1);
painter.drawImage(w - 1, h - 1, srcImg, sw - 1, sh - 1, 1, 1);
self().commit(bordered, rect.topLeft);
}
else
{
self().commit(image, noBorders.topLeft);
}
}
}