fl_compositor_software_test.cc

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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#include <thread>
#include "gtest/gtest.h"
 
#include "flutter/common/constants.h"
#include "flutter/fml/synchronization/waitable_event.h"
#include "flutter/shell/platform/linux/fl_compositor_software.h"
#include "flutter/shell/platform/linux/fl_task_runner.h"
#include "flutter/shell/platform/linux/public/flutter_linux/fl_dart_project.h"
 
#include <gdk/gdkwayland.h>
 
TEST(FlCompositorSoftwareTest, Render) {
  g_autoptr(FlDartProject) project = fl_dart_project_new();
  g_autoptr(FlEngine) engine = fl_engine_new(project);
  g_autoptr(FlTaskRunner) task_runner = fl_task_runner_new(engine);
 
  g_autoptr(FlCompositorSoftware) compositor =
      fl_compositor_software_new(task_runner);
 
  // Present layer from a thread.
  constexpr size_t width = 100;
  constexpr size_t height = 100;
  size_t row_bytes = width * 4;
  g_autofree unsigned char* layer_data =
      static_cast<unsigned char*>(malloc(height * row_bytes));
  FlutterBackingStore backing_store = {
      .type = kFlutterBackingStoreTypeSoftware,
      .software = {
          .allocation = layer_data, .row_bytes = row_bytes, .height = height}};
  FlutterLayer layer = {.type = kFlutterLayerContentTypeBackingStore,
                        .backing_store = &backing_store,
                        .offset = {0, 0},
                        .size = {width, height}};
  const FlutterLayer* layers[1] = {&layer};
  std::thread([&]() {
    fl_compositor_present_layers(FL_COMPOSITOR(compositor), layers, 1);
  }).join();
 
  // Render presented layer.
  int stride = cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, width);
  g_autofree unsigned char* image_data =
      static_cast<unsigned char*>(malloc(height * stride));
  cairo_surface_t* surface = cairo_image_surface_create_for_data(
      image_data, CAIRO_FORMAT_ARGB32, width, height, stride);
  cairo_t* cr = cairo_create(surface);
  fl_compositor_render(FL_COMPOSITOR(compositor), cr, nullptr);
  cairo_surface_destroy(surface);
  cairo_destroy(cr);
}
 
TEST(FlCompositorSoftwareTest, Resize) {
  g_autoptr(FlDartProject) project = fl_dart_project_new();
  g_autoptr(FlEngine) engine = fl_engine_new(project);
  g_autoptr(FlTaskRunner) task_runner = fl_task_runner_new(engine);
 
  g_autoptr(FlCompositorSoftware) compositor =
      fl_compositor_software_new(task_runner);
 
  // Present a layer that is the old size.
  constexpr size_t width1 = 90;
  constexpr size_t height1 = 90;
  size_t row_bytes = width1 * 4;
  g_autofree unsigned char* layer1_data =
      static_cast<unsigned char*>(malloc(height1 * row_bytes));
  FlutterBackingStore backing_store1 = {
      .type = kFlutterBackingStoreTypeSoftware,
      .software = {.allocation = layer1_data,
                   .row_bytes = row_bytes,
                   .height = height1}};
  FlutterLayer layer1 = {.type = kFlutterLayerContentTypeBackingStore,
                         .backing_store = &backing_store1,
                         .offset = {0, 0},
                         .size = {width1, height1}};
  const FlutterLayer* layers1[1] = {&layer1};
  std::thread([&]() {
    fl_compositor_present_layers(FL_COMPOSITOR(compositor), layers1, 1);
  }).join();
 
  // Present layer in current size.
  constexpr size_t width2 = 100;
  constexpr size_t height2 = 100;
  row_bytes = width2 * 4;
  g_autofree unsigned char* layer2_data =
      static_cast<unsigned char*>(malloc(height2 * row_bytes));
  FlutterBackingStore backing_store2 = {
      .type = kFlutterBackingStoreTypeSoftware,
      .software = {.allocation = layer2_data,
                   .row_bytes = row_bytes,
                   .height = height2}};
  FlutterLayer layer2 = {.type = kFlutterLayerContentTypeBackingStore,
                         .backing_store = &backing_store2,
                         .offset = {0, 0},
                         .size = {width2, height2}};
  const FlutterLayer* layers2[1] = {&layer2};
  fml::AutoResetWaitableEvent latch;
  std::thread([&]() {
    fl_compositor_present_layers(FL_COMPOSITOR(compositor), layers2, 1);
    latch.Signal();
  }).detach();
 
  // Render, will wait for the second layer if necessary.
  int stride2 = cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, width2);
  g_autofree unsigned char* image_data =
      static_cast<unsigned char*>(malloc(height2 * stride2));
  cairo_surface_t* surface = cairo_image_surface_create_for_data(
      image_data, CAIRO_FORMAT_ARGB32, width2, height2, stride2);
  cairo_t* cr = cairo_create(surface);
  fl_compositor_render(FL_COMPOSITOR(compositor), cr, nullptr);
  cairo_surface_destroy(surface);
  cairo_destroy(cr);
 
  latch.Wait();
}