Index: ui/gl/gl_surface_format.cc |
diff --git a/ui/gl/gl_surface_format.cc b/ui/gl/gl_surface_format.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..91c8898e149de0e88c0a583db55872e8c29df34b |
--- /dev/null |
+++ b/ui/gl/gl_surface_format.cc |
@@ -0,0 +1,103 @@ |
+// Copyright (c) 2017 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 "base/logging.h" |
+#include "ui/gl/gl_surface_format.h" |
+ |
+namespace gl { |
+ |
+GLSurfaceFormat::GLSurfaceFormat() { |
+} |
+ |
+GLSurfaceFormat::GLSurfaceFormat(SurfaceFormat format) { |
+ is_default = false; |
+ switch (format) { |
+ case SURFACE_ARGB8888: |
+ red_bits = green_bits = blue_bits = alpha_bits = 8; |
+ // For backwards compatibility, treat this as equivalent to the |
+ // default format. |
+ is_default = true; |
+ break; |
+ case SURFACE_RGB565: |
+ red_bits = blue_bits = 5; |
+ green_bits = 6; |
+ alpha_bits = 0; |
+ break; |
+ case SURFACE_OSMESA_BGRA: |
+ pixel_layout = SURFACE_PIXEL_LAYOUT_BGRA; |
+ break; |
+ case SURFACE_OSMESA_RGBA: |
+ pixel_layout = SURFACE_PIXEL_LAYOUT_RGBA; |
+ break; |
+ case SURFACE_SURFACELESS: |
+ is_surfaceless = true; |
+ break; |
+ default: |
+ NOTREACHED(); |
+ } |
+} |
+ |
+bool GLSurfaceFormat::IsSurfaceless() { |
+ return is_surfaceless; |
+} |
+ |
+GLSurfaceFormat::SurfacePixelLayout GLSurfaceFormat::GetPixelLayout() { |
+ return pixel_layout; |
+} |
+ |
+static int GetValue(int num, int default_value) { |
+ return num == -1 ? default_value : num; |
+} |
+ |
+static int GetBitSize(int num) { |
+ return GetValue(num, 8); |
+} |
+ |
+ |
+bool GLSurfaceFormat::IsDefault() { |
+ return is_default; |
+} |
+ |
+bool GLSurfaceFormat::IsCompatible(GLSurfaceFormat other) { |
+ if (this->IsDefault() && other.IsDefault()) return true; |
+ |
+ if (GetBitSize(this->red_bits) == GetBitSize(other.red_bits) && |
+ GetBitSize(this->green_bits) == GetBitSize(other.green_bits) && |
+ GetBitSize(this->blue_bits) == GetBitSize(other.blue_bits) && |
+ GetBitSize(this->alpha_bits) == GetBitSize(other.alpha_bits) && |
+ GetValue(this->stencil_bits, 8) == GetValue(other.stencil_bits, 8) && |
+ GetValue(this->depth_bits, 24) == GetValue(other.depth_bits, 24) && |
+ GetValue(this->samples, 0) == GetValue(other.samples, 0) && |
+ this->is_surfaceless == other.is_surfaceless && |
+ this->pixel_layout == other.pixel_layout) { |
+ return true; |
+ } |
+ return false; |
+} |
+ |
+void GLSurfaceFormat::SetDepthBits(int bits) { |
+ depth_bits = bits; |
+} |
+ |
+void GLSurfaceFormat::SetStencilBits(int bits) { |
+ stencil_bits = bits; |
+} |
+ |
+void GLSurfaceFormat::SetSamples(int num) { |
+ samples = num; |
+} |
+ |
+int GLSurfaceFormat::GetBufferSize() { |
+ int bits = GetBitSize(red_bits) + GetBitSize(green_bits) + |
+ GetBitSize(blue_bits) + GetBitSize(alpha_bits); |
+ if (bits <= 16) { |
+ return 16; |
+ } else if (bits <= 32) { |
+ return 32; |
+ } |
+ NOTREACHED(); |
+ return 64; |
+} |
+ |
+} // namespace gl |