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// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// TODO(awalker): clean up the const/non-const reference handling in this test
#include "build/build_config.h"
#if defined(OS_WIN)
#include <windows.h>
#else
#include <unistd.h>
#endif
#include "skia/ext/platform_canvas.h"
#include "skia/ext/platform_device.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "SkColor.h"
namespace skia {
namespace {
// Return true if the canvas is filled to canvas_color,
// and contains a single rectangle filled to rect_color.
bool VerifyRect(const PlatformCanvas& canvas,
uint32_t canvas_color, uint32_t rect_color,
int x, int y, int w, int h) {
PlatformDevice& device = canvas.getTopPlatformDevice();
const SkBitmap& bitmap = device.accessBitmap(false);
SkAutoLockPixels lock(bitmap);
for (int cur_y = 0; cur_y < bitmap.height(); cur_y++) {
for (int cur_x = 0; cur_x < bitmap.width(); cur_x++) {
if (cur_x >= x && cur_x < x + w &&
cur_y >= y && cur_y < y + h) {
// Inside the square should be rect_color
if (*bitmap.getAddr32(cur_x, cur_y) != rect_color)
return false;
} else {
// Outside the square should be canvas_color
if (*bitmap.getAddr32(cur_x, cur_y) != canvas_color)
return false;
}
}
}
return true;
}
// Checks whether there is a white canvas with a black square at the given
// location in pixels (not in the canvas coordinate system).
// TODO(ericroman): rename Square to Rect
bool VerifyBlackSquare(const PlatformCanvas& canvas, int x, int y, int w, int h) {
return VerifyRect(canvas, SK_ColorWHITE, SK_ColorBLACK, x, y, w, h);
}
// Check that every pixel in the canvas is a single color.
bool VerifyCanvasColor(const PlatformCanvas& canvas, uint32_t canvas_color) {
return VerifyRect(canvas, canvas_color, 0, 0, 0, 0, 0);
}
#if defined(OS_WIN)
void DrawNativeRect(PlatformCanvas& canvas, int x, int y, int w, int h) {
HDC dc = canvas.beginPlatformPaint();
RECT inner_rc;
inner_rc.left = x;
inner_rc.top = y;
inner_rc.right = x + w;
inner_rc.bottom = y + h;
FillRect(dc, &inner_rc, reinterpret_cast<HBRUSH>(GetStockObject(BLACK_BRUSH)));
canvas.endPlatformPaint();
}
#elif defined(OS_MACOSX)
void DrawNativeRect(PlatformCanvas& canvas, int x, int y, int w, int h) {
CGContextRef context = canvas.beginPlatformPaint();
CGRect inner_rc = CGRectMake(x, y, w, h);
// RGBA opaque black
CGColorRef black = CGColorCreateGenericRGB(0.0, 0.0, 0.0, 1.0);
CGContextSetFillColorWithColor(context, black);
CGColorRelease(black);
CGContextFillRect(context, inner_rc);
canvas.endPlatformPaint();
}
#else
void DrawNativeRect(PlatformCanvas& canvas, int x, int y, int w, int h) {
NOTIMPLEMENTED();
}
#endif
// Clips the contents of the canvas to the given rectangle. This will be
// intersected with any existing clip.
void AddClip(PlatformCanvas& canvas, int x, int y, int w, int h) {
SkRect rect;
rect.set(SkIntToScalar(x), SkIntToScalar(y),
SkIntToScalar(x + w), SkIntToScalar(y + h));
canvas.clipRect(rect);
}
class LayerSaver {
public:
LayerSaver(PlatformCanvas& canvas, int x, int y, int w, int h)
: canvas_(canvas),
x_(x),
y_(y),
w_(w),
h_(h) {
SkRect bounds;
bounds.set(SkIntToScalar(x_), SkIntToScalar(y_),
SkIntToScalar(right()), SkIntToScalar(bottom()));
canvas_.saveLayer(&bounds, NULL);
}
~LayerSaver() {
canvas_.getTopPlatformDevice().fixupAlphaBeforeCompositing();
canvas_.restore();
}
int x() const { return x_; }
int y() const { return y_; }
int w() const { return w_; }
int h() const { return h_; }
// Returns the EXCLUSIVE far bounds of the layer.
int right() const { return x_ + w_; }
int bottom() const { return y_ + h_; }
private:
PlatformCanvas& canvas_;
int x_, y_, w_, h_;
};
// Size used for making layers in many of the below tests.
const int kLayerX = 2;
const int kLayerY = 3;
const int kLayerW = 9;
const int kLayerH = 7;
// Size used by some tests to draw a rectangle inside the layer.
const int kInnerX = 4;
const int kInnerY = 5;
const int kInnerW = 2;
const int kInnerH = 3;
}
// This just checks that our checking code is working properly, it just uses
// regular skia primitives.
TEST(PlatformCanvas, SkLayer) {
// Create the canvas initialized to opaque white.
PlatformCanvas canvas(16, 16, true);
canvas.drawColor(SK_ColorWHITE);
// Make a layer and fill it completely to make sure that the bounds are
// correct.
{
LayerSaver layer(canvas, kLayerX, kLayerY, kLayerW, kLayerH);
canvas.drawColor(SK_ColorBLACK);
}
EXPECT_TRUE(VerifyBlackSquare(canvas, kLayerX, kLayerY, kLayerW, kLayerH));
}
// Test native clipping.
TEST(PlatformCanvas, ClipRegion) {
// Initialize a white canvas
PlatformCanvas canvas(16, 16, true);
canvas.drawColor(SK_ColorWHITE);
EXPECT_TRUE(VerifyCanvasColor(canvas, SK_ColorWHITE));
// Test that initially the canvas has no clip region, by filling it
// with a black rectangle.
// Note: Don't use LayerSaver, since internally it sets a clip region.
DrawNativeRect(canvas, 0, 0, 16, 16);
canvas.getTopPlatformDevice().fixupAlphaBeforeCompositing();
EXPECT_TRUE(VerifyCanvasColor(canvas, SK_ColorBLACK));
// Test that intersecting disjoint clip rectangles sets an empty clip region
canvas.drawColor(SK_ColorWHITE);
EXPECT_TRUE(VerifyCanvasColor(canvas, SK_ColorWHITE));
{
LayerSaver layer(canvas, 0, 0, 16, 16);
AddClip(canvas, 2, 3, 4, 5);
AddClip(canvas, 4, 9, 10, 10);
DrawNativeRect(canvas, 0, 0, 16, 16);
}
EXPECT_TRUE(VerifyCanvasColor(canvas, SK_ColorWHITE));
}
// Test the layers get filled properly by native rendering.
TEST(PlatformCanvas, FillLayer) {
// Create the canvas initialized to opaque white.
PlatformCanvas canvas(16, 16, true);
// Make a layer and fill it completely to make sure that the bounds are
// correct.
canvas.drawColor(SK_ColorWHITE);
{
LayerSaver layer(canvas, kLayerX, kLayerY, kLayerW, kLayerH);
DrawNativeRect(canvas, 0, 0, 100, 100);
}
EXPECT_TRUE(VerifyBlackSquare(canvas, kLayerX, kLayerY, kLayerW, kLayerH));
// Make a layer and fill it partially to make sure the translation is correct.
canvas.drawColor(SK_ColorWHITE);
{
LayerSaver layer(canvas, kLayerX, kLayerY, kLayerW, kLayerH);
DrawNativeRect(canvas, kInnerX, kInnerY, kInnerW, kInnerH);
}
EXPECT_TRUE(VerifyBlackSquare(canvas, kInnerX, kInnerY, kInnerW, kInnerH));
// Add a clip on the layer and fill to make sure clip is correct.
canvas.drawColor(SK_ColorWHITE);
{
LayerSaver layer(canvas, kLayerX, kLayerY, kLayerW, kLayerH);
canvas.save();
AddClip(canvas, kInnerX, kInnerY, kInnerW, kInnerH);
DrawNativeRect(canvas, 0, 0, 100, 100);
canvas.restore();
}
EXPECT_TRUE(VerifyBlackSquare(canvas, kInnerX, kInnerY, kInnerW, kInnerH));
// Add a clip and then make the layer to make sure the clip is correct.
canvas.drawColor(SK_ColorWHITE);
canvas.save();
AddClip(canvas, kInnerX, kInnerY, kInnerW, kInnerH);
{
LayerSaver layer(canvas, kLayerX, kLayerY, kLayerW, kLayerH);
DrawNativeRect(canvas, 0, 0, 100, 100);
}
canvas.restore();
EXPECT_TRUE(VerifyBlackSquare(canvas, kInnerX, kInnerY, kInnerW, kInnerH));
}
// Test that translation + make layer works properly.
TEST(PlatformCanvas, TranslateLayer) {
// Create the canvas initialized to opaque white.
PlatformCanvas canvas(16, 16, true);
// Make a layer and fill it completely to make sure that the bounds are
// correct.
canvas.drawColor(SK_ColorWHITE);
canvas.save();
canvas.translate(1, 1);
{
LayerSaver layer(canvas, kLayerX, kLayerY, kLayerW, kLayerH);
DrawNativeRect(canvas, 0, 0, 100, 100);
}
canvas.restore();
EXPECT_TRUE(VerifyBlackSquare(canvas, kLayerX + 1, kLayerY + 1,
kLayerW, kLayerH));
// Translate then make the layer.
canvas.drawColor(SK_ColorWHITE);
canvas.save();
canvas.translate(1, 1);
{
LayerSaver layer(canvas, kLayerX, kLayerY, kLayerW, kLayerH);
DrawNativeRect(canvas, kInnerX, kInnerY, kInnerW, kInnerH);
}
canvas.restore();
EXPECT_TRUE(VerifyBlackSquare(canvas, kInnerX + 1, kInnerY + 1,
kInnerW, kInnerH));
// Make the layer then translate.
canvas.drawColor(SK_ColorWHITE);
canvas.save();
{
LayerSaver layer(canvas, kLayerX, kLayerY, kLayerW, kLayerH);
canvas.translate(1, 1);
DrawNativeRect(canvas, kInnerX, kInnerY, kInnerW, kInnerH);
}
canvas.restore();
EXPECT_TRUE(VerifyBlackSquare(canvas, kInnerX + 1, kInnerY + 1,
kInnerW, kInnerH));
// Translate both before and after, and have a clip.
canvas.drawColor(SK_ColorWHITE);
canvas.save();
canvas.translate(1, 1);
{
LayerSaver layer(canvas, kLayerX, kLayerY, kLayerW, kLayerH);
canvas.translate(1, 1);
AddClip(canvas, kInnerX, kInnerY, kInnerW, kInnerH);
DrawNativeRect(canvas, 0, 0, 100, 100);
}
canvas.restore();
EXPECT_TRUE(VerifyBlackSquare(canvas, kInnerX + 2, kInnerY + 2,
kInnerW, kInnerH));
}
} // namespace skia