| // Copyright 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 "ui/gl/gl_surface_format.h" |
| #include "base/notreached.h" |
| |
| namespace gl { |
| |
| GLSurfaceFormat::GLSurfaceFormat() { |
| } |
| |
| GLSurfaceFormat::GLSurfaceFormat(const GLSurfaceFormat& other) = default; |
| |
| GLSurfaceFormat::~GLSurfaceFormat() { |
| } |
| |
| void GLSurfaceFormat::SetRGB565() { |
| red_bits_ = blue_bits_ = 5; |
| green_bits_ = 6; |
| alpha_bits_ = 0; |
| } |
| |
| 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::IsCompatible(GLSurfaceFormat other) const { |
| if (GetBitSize(red_bits_) == GetBitSize(other.red_bits_) && |
| GetBitSize(green_bits_) == GetBitSize(other.green_bits_) && |
| GetBitSize(blue_bits_) == GetBitSize(other.blue_bits_) && |
| GetBitSize(alpha_bits_) == GetBitSize(other.alpha_bits_) && |
| GetValue(stencil_bits_, 8) == GetValue(other.stencil_bits_, 8) && |
| GetValue(depth_bits_, 24) == GetValue(other.depth_bits_, 24) && |
| GetValue(samples_, 0) == GetValue(other.samples_, 0)) { |
| return true; |
| } |
| return false; |
| } |
| |
| void GLSurfaceFormat::SetDepthBits(int bits) { |
| if (bits != -1) { |
| depth_bits_ = bits; |
| } |
| } |
| |
| void GLSurfaceFormat::SetStencilBits(int bits) { |
| if (bits != -1) { |
| stencil_bits_ = bits; |
| } |
| } |
| |
| void GLSurfaceFormat::SetSamples(int num) { |
| if (num != -1) { |
| samples_ = num; |
| } |
| } |
| |
| int GLSurfaceFormat::GetBufferSize() const { |
| 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 |