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gecko-dev/gfx/cairo/d2d-repeating-gradients.patch

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From: Robert O'Callahan <robert@ocallahan.org>
Bug 768775. Improve the precision of the calculation of the number of stops that need to be added to handle 'repeat' and 'reflect', when we're filling a path. r=bas
diff --git a/gfx/cairo/cairo/src/cairo-d2d-surface.cpp b/gfx/cairo/cairo/src/cairo-d2d-surface.cpp
--- a/gfx/cairo/cairo/src/cairo-d2d-surface.cpp
+++ b/gfx/cairo/cairo/src/cairo-d2d-surface.cpp
@@ -1411,17 +1411,17 @@ static RefPtr<ID2D1Brush>
gradient_center.x = _cairo_fixed_to_float(source_pattern->c1.x);
gradient_center.y = _cairo_fixed_to_float(source_pattern->c1.y);
// Transform surface corners into pattern coordinates.
cairo_matrix_transform_point(&source_pattern->base.base.matrix, &top_left.x, &top_left.y);
cairo_matrix_transform_point(&source_pattern->base.base.matrix, &top_right.x, &top_right.y);
cairo_matrix_transform_point(&source_pattern->base.base.matrix, &bottom_left.x, &bottom_left.y);
- cairo_matrix_transform_point(&source_pattern->base.base.matrix, &bottom_right.x, &top_left.y);
+ cairo_matrix_transform_point(&source_pattern->base.base.matrix, &bottom_right.x, &bottom_right.y);
// Find the corner furthest away from the gradient center in pattern space.
double largest = MAX(_cairo_d2d_point_dist(top_left, gradient_center), _cairo_d2d_point_dist(top_right, gradient_center));
largest = MAX(largest, _cairo_d2d_point_dist(bottom_left, gradient_center));
largest = MAX(largest, _cairo_d2d_point_dist(bottom_right, gradient_center));
unsigned int minSize = (unsigned int)ceil(largest);
@@ -1531,16 +1531,17 @@ static RefPtr<ID2D1Brush>
stopCollection,
&brush);
delete [] stops;
return brush;
}
static RefPtr<ID2D1Brush>
_cairo_d2d_create_linear_gradient_brush(cairo_d2d_surface_t *d2dsurf,
+ cairo_path_fixed_t *fill_path,
cairo_linear_pattern_t *source_pattern)
{
if (source_pattern->p1.x == source_pattern->p2.x &&
source_pattern->p1.y == source_pattern->p2.y) {
// Cairo behavior in this situation is to draw a solid color the size of the last stop.
RefPtr<ID2D1SolidColorBrush> brush;
d2dsurf->rt->CreateSolidColorBrush(
_cairo_d2d_color_from_cairo_color_stop(source_pattern->base.stops[source_pattern->base.n_stops - 1].color),
@@ -1564,35 +1565,46 @@ static RefPtr<ID2D1Brush>
p1.x = _cairo_fixed_to_float(source_pattern->p1.x);
p1.y = _cairo_fixed_to_float(source_pattern->p1.y);
p2.x = _cairo_fixed_to_float(source_pattern->p2.x);
p2.y = _cairo_fixed_to_float(source_pattern->p2.y);
D2D1_GRADIENT_STOP *stops;
int num_stops = source_pattern->base.n_stops;
if (source_pattern->base.base.extend == CAIRO_EXTEND_REPEAT || source_pattern->base.base.extend == CAIRO_EXTEND_REFLECT) {
-
- RefPtr<IDXGISurface> surf;
- d2dsurf->surface->QueryInterface(&surf);
- DXGI_SURFACE_DESC desc;
- surf->GetDesc(&desc);
-
// Get this when the points are not transformed yet.
double gradient_length = _cairo_d2d_point_dist(p1, p2);
-
- // Calculate the repeat count needed;
- cairo_point_double_t top_left, top_right, bottom_left, bottom_right;
- top_left.x = bottom_left.x = top_left.y = top_right.y = 0;
- top_right.x = bottom_right.x = desc.Width;
- bottom_right.y = bottom_left.y = desc.Height;
+ cairo_point_double_t top_left, top_right, bottom_left, bottom_right;
+
+ if (fill_path) {
+ // Calculate the repeat count needed;
+ cairo_box_t fill_extents;
+ _cairo_path_fixed_extents (fill_path, &fill_extents);
+
+ top_left.x = bottom_left.x = _cairo_fixed_to_double (fill_extents.p1.x);
+ top_left.y = top_right.y = _cairo_fixed_to_double (fill_extents.p1.y);
+ top_right.x = bottom_right.x = _cairo_fixed_to_double (fill_extents.p2.x);
+ bottom_right.y = bottom_left.y = _cairo_fixed_to_double (fill_extents.p2.y);
+ } else {
+ RefPtr<IDXGISurface> surf;
+ d2dsurf->surface->QueryInterface(&surf);
+ DXGI_SURFACE_DESC desc;
+ surf->GetDesc(&desc);
+
+ top_left.x = bottom_left.x = 0;
+ top_left.y = top_right.y = 0;
+ top_right.x = bottom_right.x = desc.Width;
+ bottom_right.y = bottom_left.y = desc.Height;
+ }
+
// Transform the corners of our surface to pattern space.
cairo_matrix_transform_point(&source_pattern->base.base.matrix, &top_left.x, &top_left.y);
cairo_matrix_transform_point(&source_pattern->base.base.matrix, &top_right.x, &top_right.y);
cairo_matrix_transform_point(&source_pattern->base.base.matrix, &bottom_left.x, &bottom_left.y);
- cairo_matrix_transform_point(&source_pattern->base.base.matrix, &bottom_right.x, &top_left.y);
+ cairo_matrix_transform_point(&source_pattern->base.base.matrix, &bottom_right.x, &bottom_right.y);
cairo_point_double_t u;
// Unit vector of the gradient direction.
u = _cairo_d2d_subtract_point(p2, p1);
_cairo_d2d_normalize_point(&u);
// (corner - p1) . u = |corner - p1| cos(a) where a is the angle between the two vectors.
// Coincidentally |corner - p1| cos(a) is actually also the distance our gradient needs to cover since
@@ -1701,17 +1713,18 @@ static RefPtr<ID2D1Brush>
* \param d2dsurf Surface to create a brush for
* \param pattern The pattern to create a brush for
* \param unique We cache the bitmap/color brush for speed. If this
* needs a brush that is unique (i.e. when more than one is needed),
* this will make the function return a seperate brush.
* \return A brush object
*/
static RefPtr<ID2D1Brush>
-_cairo_d2d_create_brush_for_pattern(cairo_d2d_surface_t *d2dsurf,
+_cairo_d2d_create_brush_for_pattern(cairo_d2d_surface_t *d2dsurf,
+ cairo_path_fixed_t *fill_path,
const cairo_pattern_t *pattern,
bool unique = false)
{
HRESULT hr;
if (pattern->type == CAIRO_PATTERN_TYPE_SOLID) {
cairo_solid_pattern_t *sourcePattern =
(cairo_solid_pattern_t*)pattern;
@@ -1729,17 +1742,17 @@ static RefPtr<ID2D1Brush>
d2dsurf->solidColorBrush->SetColor(color);
}
return d2dsurf->solidColorBrush;
}
} else if (pattern->type == CAIRO_PATTERN_TYPE_LINEAR) {
cairo_linear_pattern_t *source_pattern =
(cairo_linear_pattern_t*)pattern;
- return _cairo_d2d_create_linear_gradient_brush(d2dsurf, source_pattern);
+ return _cairo_d2d_create_linear_gradient_brush(d2dsurf, fill_path, source_pattern);
} else if (pattern->type == CAIRO_PATTERN_TYPE_RADIAL) {
cairo_radial_pattern_t *source_pattern =
(cairo_radial_pattern_t*)pattern;
return _cairo_d2d_create_radial_gradient_brush(d2dsurf, source_pattern);
} else if (pattern->type == CAIRO_PATTERN_TYPE_SURFACE) {
cairo_matrix_t mat = pattern->matrix;
cairo_matrix_invert(&mat);
@@ -3228,17 +3241,17 @@ static cairo_int_status_t
if (unlikely(status))
return status;
}
#endif
target_rt->SetAntialiasMode(D2D1_ANTIALIAS_MODE_ALIASED);
- RefPtr<ID2D1Brush> brush = _cairo_d2d_create_brush_for_pattern(d2dsurf,
+ RefPtr<ID2D1Brush> brush = _cairo_d2d_create_brush_for_pattern(d2dsurf, NULL,
source);
if (!brush) {
return CAIRO_INT_STATUS_UNSUPPORTED;
}
D2D1_SIZE_F size = target_rt->GetSize();
target_rt->FillRectangle(D2D1::RectF((FLOAT)0,
@@ -3349,17 +3362,17 @@ static cairo_int_status_t
source->filter,
solidAlphaValue);
if (rv != CAIRO_INT_STATUS_UNSUPPORTED) {
return rv;
}
}
}
- RefPtr<ID2D1Brush> brush = _cairo_d2d_create_brush_for_pattern(d2dsurf, source);
+ RefPtr<ID2D1Brush> brush = _cairo_d2d_create_brush_for_pattern(d2dsurf, NULL, source);
if (!brush) {
return CAIRO_INT_STATUS_UNSUPPORTED;
}
RefPtr<ID2D1RenderTarget> target_rt = d2dsurf->rt;
#ifndef ALWAYS_MANUAL_COMPOSITE
if (op != CAIRO_OPERATOR_OVER) {
#endif
@@ -3389,17 +3402,17 @@ static cairo_int_status_t
brush->SetOpacity(1.0);
if (target_rt.get() != d2dsurf->rt.get()) {
return _cairo_d2d_blend_temp_surface(d2dsurf, op, target_rt, clip);
}
return CAIRO_INT_STATUS_SUCCESS;
}
- RefPtr<ID2D1Brush> opacityBrush = _cairo_d2d_create_brush_for_pattern(d2dsurf, mask, true);
+ RefPtr<ID2D1Brush> opacityBrush = _cairo_d2d_create_brush_for_pattern(d2dsurf, NULL, mask, true);
if (!opacityBrush) {
return CAIRO_INT_STATUS_UNSUPPORTED;
}
if (!d2dsurf->maskLayer) {
d2dsurf->rt->CreateLayer(&d2dsurf->maskLayer);
}
target_rt->PushLayer(D2D1::LayerParameters(D2D1::InfiniteRect(),
@@ -3475,17 +3488,17 @@ static cairo_int_status_t
D2D1_FIGURE_BEGIN_FILLED);
bool transformed = true;
if (_cairo_matrix_is_identity(ctm)) {
transformed = false;
}
- RefPtr<ID2D1Brush> brush = _cairo_d2d_create_brush_for_pattern(d2dsurf,
+ RefPtr<ID2D1Brush> brush = _cairo_d2d_create_brush_for_pattern(d2dsurf, NULL,
source);
if (!brush) {
return CAIRO_INT_STATUS_UNSUPPORTED;
}
D2D1::Matrix3x2F mat;
if (transformed) {
// If we are transformed we will draw the geometry multiplied by the
@@ -3602,31 +3615,31 @@ static cairo_int_status_t
}
if (is_box) {
float x1 = _cairo_fixed_to_float(box.p1.x);
float y1 = _cairo_fixed_to_float(box.p1.y);
float x2 = _cairo_fixed_to_float(box.p2.x);
float y2 = _cairo_fixed_to_float(box.p2.y);
RefPtr<ID2D1Brush> brush = _cairo_d2d_create_brush_for_pattern(d2dsurf,
- source);
+ path, source);
if (!brush) {
return CAIRO_INT_STATUS_UNSUPPORTED;
}
target_rt->FillRectangle(D2D1::RectF(x1,
y1,
x2,
y2),
brush);
} else {
RefPtr<ID2D1Geometry> d2dpath = _cairo_d2d_create_path_geometry_for_path(path, fill_rule, D2D1_FIGURE_BEGIN_FILLED);
RefPtr<ID2D1Brush> brush = _cairo_d2d_create_brush_for_pattern(d2dsurf,
- source);
+ path, source);
if (!brush) {
return CAIRO_INT_STATUS_UNSUPPORTED;
}
target_rt->FillGeometry(d2dpath, brush);
}
if (target_rt.get() != d2dsurf->rt.get()) {
double x1, y1, x2, y2;
@@ -4138,17 +4151,17 @@ static cairo_int_status_t
DWRITE_TEXTURE_ALIASED_1x1 : DWRITE_TEXTURE_CLEARTYPE_3x1,
&bounds);
fontArea.x = bounds.left;
fontArea.y = bounds.top;
fontArea.width = bounds.right - bounds.left;
fontArea.height = bounds.bottom - bounds.top;
}
- RefPtr<ID2D1Brush> brush = _cairo_d2d_create_brush_for_pattern(dst,
+ RefPtr<ID2D1Brush> brush = _cairo_d2d_create_brush_for_pattern(dst, NULL,
source);
if (!brush) {
return CAIRO_INT_STATUS_UNSUPPORTED;
}
if (transform) {
D2D1::Matrix3x2F mat_inverse = _cairo_d2d_matrix_from_matrix(&dwritesf->mat_inverse);
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