gl: Test YV12 buffer drm import.

ui/gl/gl_image_ozone_native_pixmap_drm_unittest.cc

+// Copyright 2016 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.
+
+#include <fcntl.h>
+#include <libdrm/i915_drm.h>
+#include <linux/types.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <sys/mman.h>
+#include <xf86drm.h>
+
+#include "base/files/scoped_file.h"
+#include "base/posix/eintr_wrapper.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gfx/buffer_types.h"
+#include "ui/gl/gl_image_ozone_native_pixmap.h"
+#include "ui/gl/test/gl_image_test_template.h"
+#include "ui/ozone/public/ozone_platform.h"
+#include "ui/ozone/public/surface_factory_ozone.h"
+
+namespace gl {
+namespace {
+
+// These values are picked so that RGB -> YVU on the CPU converted
+// back to RGB on the GPU produces the original RGB values without
+// any error.
+const uint8_t kImageColor[] = {0x10, 0x20, 0, 0xFF};
+
+// Round |num| up to 64.
+int RoundTo64(int num) {
+  return (num + 63) & ~63;
+}
+
+// Create a YVU420 NativePixmap using the drm interface directly.
+scoped_refptr<ui::NativePixmap> CreateYVU420Pixmap(const gfx::Size& size,
+                                                   const uint8_t color[4]) {
+  DCHECK_EQ(0, size.width() % 2);
+  DCHECK_EQ(0, size.height() % 2);
+
+  // TODO(dcastagna): move the creation of the drmbuf to minigmb, where it's
+  // supposed to be, so we can abastract it and use SurfaceFactoryOzone.
+  base::ScopedFD drm_fd(
+      HANDLE_EINTR(open("/dev/dri/card0", O_RDWR | O_CLOEXEC)));
+  DCHECK(drm_fd.is_valid()) << "Couldn't open '/dev/dri/card0'";
+  {  // Check we have permissions
+    drm_magic_t magic{};
+    bool ret = !drmGetMagic(drm_fd.get(), &magic) &&
+               !drmAuthMagic(drm_fd.get(), magic);
+    DCHECK(ret);
+  }
+
+  std::vector<int> pitches{RoundTo64(size.width()), RoundTo64(size.width() / 2),
+                           RoundTo64(size.width() / 2)};
+  std::vector<int> offsets{
+      0, pitches[0] * size.height() + pitches[1] * size.height() / 2,
+      pitches[0] * size.height(),
+  };
+  size_t byte_number = offsets[2] + pitches[2] * size.height() / 2;
+
+  struct drm_i915_gem_create gem_create {};
+  gem_create.size = byte_number;
+  int ret = drmIoctl(drm_fd.get(), DRM_IOCTL_I915_GEM_CREATE, &gem_create);
+  DCHECK(!ret) << "Can't create the GEM buffer.";
+  struct drm_i915_gem_set_tiling gem_set_tiling {};
+  do {
+    gem_set_tiling.handle = gem_create.handle;
+    gem_set_tiling.tiling_mode = I915_TILING_NONE;
+    ret =
+        drmIoctl(drm_fd.get(), DRM_IOCTL_I915_GEM_SET_TILING, &gem_set_tiling);
+  } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
+  DCHECK_NE(-1, ret);
+  int fd = -1;
+  drmPrimeHandleToFD(drm_fd.get(), gem_create.handle, DRM_CLOEXEC, &fd);
+  EXPECT_NE(-1, fd);
+
+  std::vector<uint8_t> data(byte_number);
+  for (int plane = 0; plane < 3; ++plane) {
+    GLImageTestSupport::SetBufferDataToColor(
+        size.width(), size.height(), pitches[plane], plane,
+        gfx::BufferFormat::YVU_420, kImageColor, &data[offsets[plane]]);
+  }
+
+  // TODO(dcastagna): Add support for mapping planar formats with
+  // ClientNativePixmap and remove this code.
+  struct drm_i915_gem_pwrite gem_pwrite {};
+  gem_pwrite.handle = gem_create.handle;
+  gem_pwrite.size = byte_number;
+  gem_pwrite.data_ptr = reinterpret_cast<uint64_t>(&data[0]);
+  ret = drmIoctl(drm_fd.get(), DRM_IOCTL_I915_GEM_PWRITE, &gem_pwrite);
+  DCHECK(!ret) << "Problems with drmIoctl when writing data.";
+
+  gfx::NativePixmapHandle pixmap_handle;
+  pixmap_handle.fds.emplace_back(fd, false);
+  for (int i = 0; i < 3; i++) {
+    pixmap_handle.strides_and_offsets.emplace_back(pitches[i], offsets[i]);
+  }
+  ui::SurfaceFactoryOzone* surface_factory =
+      ui::OzonePlatform::GetInstance()->GetSurfaceFactoryOzone();
+  return surface_factory->CreateNativePixmapFromHandle(
+      size, gfx::BufferFormat::YVU_420, pixmap_handle);
+}
+
+// Delegate to test EGL images created directly using drm.
+// YVU420 buffers can't be created yet via Ozone, we still
+// want to test them since they can be imported and displayed
+// via exo.
+// TODO(dcastagna): once it's possible to allocate and map YV12 format
+// using Ozone merge this test with GLImageOzoneNativePixmapTestDelegate.
+class GLImageOzoneNativePixmapDrmTestDelegate {
+ public:
+  GLImageOzoneNativePixmapDrmTestDelegate() {}
+  scoped_refptr<GLImage> CreateSolidColorImage(const gfx::Size& size,
+                                               const uint8_t color[4]) const {
+    scoped_refptr<ui::NativePixmap> pixmap = CreateYVU420Pixmap(size, color);
+
+    scoped_refptr<GLImageOzoneNativePixmap> image(
+        new GLImageOzoneNativePixmap(size, GL_RGB_YCRCB_420_CHROMIUM));
+    EXPECT_TRUE(image->Initialize(pixmap.get(), pixmap->GetBufferFormat()));
+    return image;
+  }
+
+  unsigned GetTextureTarget() const { return GL_TEXTURE_EXTERNAL_OES; }
+
+  const uint8_t* GetImageColor() { return kImageColor; }
+
+ private:
+};
+
+INSTANTIATE_TYPED_TEST_CASE_P(GLImageOzoneNativePixmapDrm,
+                              GLImageTest,
+                              GLImageOzoneNativePixmapDrmTestDelegate);
+
+INSTANTIATE_TYPED_TEST_CASE_P(GLImageOzoneNativePixmapDrm,
+                              GLImageBindTest,
+                              GLImageOzoneNativePixmapDrmTestDelegate);
+
+}  // namespace
+}  // namespace gl