ui: s/XR30/AR30/ and support it for SCANOUT

This CL replaces the DRM specific XR30 with AR30 where
appropriate, and adds the necessary entries to support
AR30 with SCANOUT usage.

This format started being supported with the recent Mesa
uprev.

Test: forcing BGRA_1010102 as DisplaySnapshot::PrimaryFormat,
and allowing for only an opaque FB (ToT wants both opaque and
normal) the primary plane of the device is indeed XR30 as per
/sys/kernel/debug/dri/0/state).
and
 gl_unittests  --gtest_also_run_disabled_tests
and
 ozone_gl_unittests  --gtest_also_run_disabled_tests
AR30 test cases passing.

Bug: 949260
Change-Id: I852433d30a5243f682b7bb9b9e8bbb0184b1d4d2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2068825
Commit-Queue: Miguel Casas <mcasas@chromium.org>
Reviewed-by: Daniel Nicoara <dnicoara@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Michael Spang <spang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#747122}

gpu/command_buffer/common/gpu_memory_buffer_support.cc

@@ -80,7 +80,8 @@ GPU_EXPORT bool NativeBufferNeedsPlatformSpecificTextureTarget(
       format == gfx::BufferFormat::BGRA_8888 ||
       format == gfx::BufferFormat::RGBX_8888 ||
       format == gfx::BufferFormat::BGRX_8888 ||
-      format == gfx::BufferFormat::RGBA_1010102) {
+      format == gfx::BufferFormat::RGBA_1010102 ||
+      format == gfx::BufferFormat::BGRA_1010102) {
     return false;
   }
 #elif defined(OS_ANDROID)

gpu/command_buffer/service/feature_info.h

@@ -37,9 +37,10 @@ class GPU_GLES2_EXPORT FeatureInfo : public base::RefCounted<FeatureInfo> {
     FeatureFlags();
 
     GpuMemoryBufferFormatSet gpu_memory_buffer_formats = {
-        gfx::BufferFormat::BGR_565,   gfx::BufferFormat::RGBA_4444,
-        gfx::BufferFormat::RGBA_8888, gfx::BufferFormat::RGBX_8888,
-        gfx::BufferFormat::YVU_420,   gfx::BufferFormat::RGBA_1010102,
+        gfx::BufferFormat::BGR_565,      gfx::BufferFormat::RGBA_4444,
+        gfx::BufferFormat::RGBA_8888,    gfx::BufferFormat::RGBX_8888,
+        gfx::BufferFormat::YVU_420,      gfx::BufferFormat::RGBA_1010102,
+        gfx::BufferFormat::BGRA_1010102,
     };
     // Use glBlitFramebuffer() and glRenderbufferStorageMultisample() with
     // GL_EXT_framebuffer_multisample-style semantics (as opposed to

ui/gfx/buffer_format_util.cc

@@ -44,6 +44,7 @@ size_t AlphaBitsForBufferFormat(BufferFormat format) {
       return 4;
     case BufferFormat::RGBA_8888:
       return 8;
+    case BufferFormat::BGRA_1010102:
     case BufferFormat::RGBA_1010102:
       return 2;
     case BufferFormat::BGRA_8888:
@@ -56,7 +57,6 @@ size_t AlphaBitsForBufferFormat(BufferFormat format) {
     case BufferFormat::BGR_565:
     case BufferFormat::RGBX_8888:
     case BufferFormat::BGRX_8888:
-    case BufferFormat::BGRA_1010102:
     case BufferFormat::YVU_420:
     case BufferFormat::YUV_420_BIPLANAR:
     case BufferFormat::P010:

ui/gfx/linux/drm_util_linux.cc

@@ -40,7 +40,7 @@ int GetFourCCFormatFromBufferFormat(gfx::BufferFormat format) {
     case gfx::BufferFormat::BGRX_8888:
       return DRM_FORMAT_XRGB8888;
     case gfx::BufferFormat::BGRA_1010102:
-      return DRM_FORMAT_XRGB2101010;
+      return DRM_FORMAT_ARGB2101010;
     case gfx::BufferFormat::RGBA_1010102:
       return DRM_FORMAT_ABGR2101010;
     case gfx::BufferFormat::RGBA_F16:
@@ -69,7 +69,7 @@ gfx::BufferFormat GetBufferFormatFromFourCCFormat(int format) {
       return gfx::BufferFormat::BGRA_8888;
     case DRM_FORMAT_XRGB8888:
       return gfx::BufferFormat::BGRX_8888;
-    case DRM_FORMAT_XRGB2101010:
+    case DRM_FORMAT_ARGB2101010:
       return gfx::BufferFormat::BGRA_1010102;
     case DRM_FORMAT_ABGR2101010:
       return gfx::BufferFormat::RGBA_1010102;
@@ -95,7 +95,7 @@ bool IsValidBufferFormat(uint32_t current_format) {
     case DRM_FORMAT_XBGR8888:
     case DRM_FORMAT_ARGB8888:
     case DRM_FORMAT_XRGB8888:
-    case DRM_FORMAT_XRGB2101010:
+    case DRM_FORMAT_ARGB2101010:
     case DRM_FORMAT_ABGR2101010:
     case DRM_FORMAT_RGB565:
     case DRM_FORMAT_NV12:

ui/gl/gl_image_native_pixmap.cc

@@ -30,7 +30,7 @@
 #define DRM_FORMAT_XRGB8888 FOURCC('X', 'R', '2', '4')
 #define DRM_FORMAT_XBGR8888 FOURCC('X', 'B', '2', '4')
 #define DRM_FORMAT_ABGR2101010 FOURCC('A', 'B', '3', '0')
-#define DRM_FORMAT_XRGB2101010 FOURCC('X', 'R', '3', '0')
+#define DRM_FORMAT_ARGB2101010 FOURCC('A', 'R', '3', '0')
 #define DRM_FORMAT_YVU420 FOURCC('Y', 'V', '1', '2')
 #define DRM_FORMAT_NV12 FOURCC('N', 'V', '1', '2')
 #define DRM_FORMAT_P010 FOURCC('P', '0', '1', '0')
@@ -72,7 +72,7 @@ EGLint FourCC(gfx::BufferFormat format) {
     case gfx::BufferFormat::RGBA_1010102:
       return DRM_FORMAT_ABGR2101010;
     case gfx::BufferFormat::BGRA_1010102:
-      return DRM_FORMAT_XRGB2101010;
+      return DRM_FORMAT_ARGB2101010;
     case gfx::BufferFormat::YVU_420:
       return DRM_FORMAT_YVU420;
     case gfx::BufferFormat::YUV_420_BIPLANAR:
@@ -104,6 +104,8 @@ gfx::BufferFormat GetBufferFormatFromFourCCFormat(int format) {
       return gfx::BufferFormat::BGRX_8888;
     case DRM_FORMAT_ABGR2101010:
       return gfx::BufferFormat::RGBA_1010102;
+    case DRM_FORMAT_ARGB2101010:
+      return gfx::BufferFormat::BGRA_1010102;
     case DRM_FORMAT_RGB565:
       return gfx::BufferFormat::BGR_565;
     case DRM_FORMAT_NV12:

ui/gl/test/gl_image_test_support.cc

@@ -138,19 +138,22 @@ void GLImageTestSupport::SetBufferDataToColor(int width,
         }
       }
       return;
-    case gfx::BufferFormat::BGRA_1010102:
+    case gfx::BufferFormat::BGRA_1010102: {
       DCHECK_EQ(0, plane);
+      DCHECK_EQ(63, color[3] % 64) << "Alpha channel doesn't have enough "
+                                      "precision for the supplied value";
+      const uint8_t scaled_alpha = color[3] >> 6;
       for (int y = 0; y < height; ++y) {
         for (int x = 0; x < width; ++x) {
           *reinterpret_cast<uint32_t*>(&data[y * stride + x * 4]) =
-              0x3 << 30 |  // Alpha channel is unused
-              ((color[0] << 2) | (color[0] >> 6)) << 20 |  // R
+              (scaled_alpha << 30) |                       // A
+              ((color[0] << 2) | (color[0] >> 6)) << 20 |  // B
               ((color[1] << 2) | (color[1] >> 6)) << 10 |  // G
-              ((color[2] << 2) | (color[2] >> 6));         // B
+              ((color[2] << 2) | (color[2] >> 6));         // R
         }
       }
       return;
-
+    }
     case gfx::BufferFormat::RGBA_1010102: {
       DCHECK_EQ(0, plane);
       DCHECK_EQ(63, color[3] % 64) << "Alpha channel doesn't have enough "
@@ -167,7 +170,6 @@ void GLImageTestSupport::SetBufferDataToColor(int width,
       }
       return;
     }
-
     case gfx::BufferFormat::BGRA_8888:
       DCHECK_EQ(0, plane);
       for (int y = 0; y < height; ++y) {

ui/ozone/gl/gl_image_ozone_native_pixmap_unittest.cc

@@ -91,7 +91,9 @@ INSTANTIATE_TYPED_TEST_SUITE_P(GLImageNativePixmapScanoutBGRA,
 
 using GLImageScanoutTypeDisabled = testing::Types<
     GLImageNativePixmapTestDelegate<gfx::BufferUsage::SCANOUT,
-                                    gfx::BufferFormat::RGBA_1010102>>;
+                                    gfx::BufferFormat::RGBA_1010102>,
+    GLImageNativePixmapTestDelegate<gfx::BufferUsage::SCANOUT,
+                                    gfx::BufferFormat::BGRA_1010102>>;
 
 // This test is disabled since we need mesa support for AB30 that is not
 // available on many boards yet.

ui/ozone/platform/drm/gpu/hardware_display_plane_manager_unittest.cc

@@ -909,8 +909,7 @@ TEST_P(HardwareDisplayPlaneManagerTest, ForceOpaqueFormatsForAddFramebuffer) {
     uint32_t used_fourcc;   // FourCC expected to be used in AddFramebuffer.
   } kFourCCFormats[] = {
       {DRM_FORMAT_ABGR2101010, DRM_FORMAT_XBGR2101010},
-      // TODO(mcasas): use AR30 when the CLs in crrev.com/c/2068722 have landed.
-      {DRM_FORMAT_XRGB2101010, DRM_FORMAT_XRGB2101010},
+      {DRM_FORMAT_ARGB2101010, DRM_FORMAT_XRGB2101010},
   };
 
   for (const auto& format_pair : kFourCCFormats) {

ui/ozone/platform/drm/gpu/mock_gbm_device.cc

@@ -121,7 +121,7 @@ std::unique_ptr<GbmBuffer> MockGbmDevice::CreateBufferWithModifiers(
   switch (format) {
     case DRM_FORMAT_XRGB8888:
     case DRM_FORMAT_ARGB8888:
-    case DRM_FORMAT_XRGB2101010:
+    case DRM_FORMAT_ARGB2101010:
     case DRM_FORMAT_ABGR2101010:
       bytes_per_pixel = 4;
       break;