void Path::transform(const AffineTransform& trans)
{
cairo_t* m_cr = platformPath()->m_cr;
cairo_matrix_t c_matrix = cairo_matrix_t(trans);
cairo_matrix_invert(&c_matrix);
cairo_transform(m_cr, &c_matrix);
}
void Path::transform(const AffineTransform& trans)
{
cairo_t* cr = ensurePlatformPath()->context();
cairo_matrix_t c_matrix = cairo_matrix_t(trans);
cairo_matrix_invert(&c_matrix);
cairo_transform(cr, &c_matrix);
}
void GraphicsContext::setCTM(const AffineTransform& transform)
{
if (paintingDisabled())
return;
cairo_t* cr = platformContext()->cr();
const cairo_matrix_t matrix = cairo_matrix_t(transform);
cairo_set_matrix(cr, &matrix);
m_data->setCTM(transform);
}
void Image::drawPattern(GraphicsContext* context, const FloatRect& tileRect, const TransformationMatrix& patternTransform,
const FloatPoint& phase, CompositeOperator op, const FloatRect& destRect)
{
cairo_surface_t* image = nativeImageForCurrentFrame();
if (!image) // If it's too early we won't have an image yet.
return;
cairo_t* cr = context->platformContext();
context->save();
IntRect imageSize = enclosingIntRect(tileRect);
OwnPtr<ImageBuffer> imageSurface = ImageBuffer::create(imageSize.size(), false);
if (!imageSurface)
return;
if (tileRect.size() != size()) {
cairo_t* clippedImageContext = imageSurface->context()->platformContext();
cairo_set_source_surface(clippedImageContext, image, -tileRect.x(), -tileRect.y());
cairo_paint(clippedImageContext);
image = imageSurface->image()->nativeImageForCurrentFrame();
}
cairo_pattern_t* pattern = cairo_pattern_create_for_surface(image);
cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
// Workaround to avoid the unwanted gradient effect (#14017)
cairo_pattern_set_filter(pattern, CAIRO_FILTER_NEAREST);
cairo_matrix_t pattern_matrix = cairo_matrix_t(patternTransform);
cairo_matrix_t phase_matrix = {1, 0, 0, 1, phase.x() + tileRect.x() * patternTransform.a(), phase.y() + tileRect.y() * patternTransform.d()};
cairo_matrix_t combined;
cairo_matrix_multiply(&combined, &pattern_matrix, &phase_matrix);
cairo_matrix_invert(&combined);
cairo_pattern_set_matrix(pattern, &combined);
context->setCompositeOperation(op);
cairo_set_source(cr, pattern);
cairo_pattern_destroy(pattern);
cairo_rectangle(cr, destRect.x(), destRect.y(), destRect.width(), destRect.height());
cairo_fill(cr);
context->restore();
if (imageObserver())
imageObserver()->didDraw(this);
}
void drawPatternToCairoContext(cairo_t* cr, cairo_surface_t* image, const IntSize& imageSize, const FloatRect& tileRect,
const AffineTransform& patternTransform, const FloatPoint& phase, cairo_operator_t op, const FloatRect& destRect)
{
// Avoid NaN
if (!isfinite(phase.x()) || !isfinite(phase.y()))
return;
cairo_save(cr);
RefPtr<cairo_surface_t> clippedImageSurface = 0;
if (tileRect.size() != imageSize) {
IntRect imageRect = enclosingIntRect(tileRect);
clippedImageSurface = adoptRef(cairo_image_surface_create(CAIRO_FORMAT_ARGB32, imageRect.width(), imageRect.height()));
RefPtr<cairo_t> clippedImageContext = adoptRef(cairo_create(clippedImageSurface.get()));
cairo_set_source_surface(clippedImageContext.get(), image, -tileRect.x(), -tileRect.y());
cairo_paint(clippedImageContext.get());
image = clippedImageSurface.get();
}
cairo_pattern_t* pattern = cairo_pattern_create_for_surface(image);
cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
cairo_matrix_t patternMatrix = cairo_matrix_t(patternTransform);
cairo_matrix_t phaseMatrix = {1, 0, 0, 1, phase.x() + tileRect.x() * patternTransform.a(), phase.y() + tileRect.y() * patternTransform.d()};
cairo_matrix_t combined;
cairo_matrix_multiply(&combined, &patternMatrix, &phaseMatrix);
cairo_matrix_invert(&combined);
cairo_pattern_set_matrix(pattern, &combined);
cairo_set_operator(cr, op);
cairo_set_source(cr, pattern);
cairo_pattern_destroy(pattern);
cairo_rectangle(cr, destRect.x(), destRect.y(), destRect.width(), destRect.height());
cairo_fill(cr);
cairo_restore(cr);
}
void VectorGraphics::push_matrix() {
matrix_stack_.push_front(cairo_matrix_t());
cairo_get_matrix(cr(), &matrix_stack_.front());
}
