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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 "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
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