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// 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 "base/logging.h"
#include "ui/gl/gl_surface_format.h"
namespace gl {
GLSurfaceFormat::GLSurfaceFormat() {
}
GLSurfaceFormat::GLSurfaceFormat(SurfacePixelLayout layout) {
is_default_ = false;
pixel_layout_ = layout;
}
GLSurfaceFormat::GLSurfaceFormat(const GLSurfaceFormat& other) = default;
GLSurfaceFormat::~GLSurfaceFormat() {
}
bool GLSurfaceFormat::IsSurfaceless() {
return is_surfaceless_;
}
GLSurfaceFormat::SurfacePixelLayout GLSurfaceFormat::GetPixelLayout() {
return pixel_layout_;
}
void GLSurfaceFormat::SetDefaultPixelLayout(SurfacePixelLayout layout) {
if (pixel_layout_ == PIXEL_LAYOUT_DONT_CARE &&
layout != PIXEL_LAYOUT_DONT_CARE) {
pixel_layout_ = layout;
is_default_ = false;
}
}
void GLSurfaceFormat::SetRGB565() {
red_bits_ = blue_bits_ = 5;
green_bits_ = 6;
alpha_bits_ = 0;
is_default_ = false;
}
void GLSurfaceFormat::SetIsSurfaceless() {
is_surfaceless_ = true;
is_default_ = false;
}
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 (IsDefault() && other.IsDefault()) return true;
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) &&
is_surfaceless_ == other.is_surfaceless_ &&
pixel_layout_ == other.pixel_layout_) {
return true;
}
return false;
}
void GLSurfaceFormat::SetDepthBits(int bits) {
if (bits != -1) {
depth_bits_ = bits;
is_default_ = false;
}
}
int GLSurfaceFormat::GetDepthBits() {
return depth_bits_;
}
void GLSurfaceFormat::SetStencilBits(int bits) {
if (bits != -1) {
stencil_bits_ = bits;
is_default_ = false;
}
}
int GLSurfaceFormat::GetStencilBits() {
return stencil_bits_;
}
void GLSurfaceFormat::SetSamples(int num) {
if (num != -1) {
samples_ = num;
is_default_ = false;
}
}
int GLSurfaceFormat::GetSamples() {
return samples_;
}
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
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