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// Copyright (c) 2009 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.
// This file contains the implementation of the helper functions for resources.
#include "gpu/command_buffer/common/resource.h"
namespace gpu {
namespace texture {
// Gets the number of bytes per block for a given format.
unsigned int GetBytesPerBlock(Format format) {
switch (format) {
case kXRGB8:
case kARGB8:
case kR32F:
return 4;
case kABGR16F:
return 8;
case kABGR32F:
return 16;
case kDXT1:
return 8;
case kUnknown:
default:
// TODO(petersont): Add DXT3/5 support.
LOG(FATAL) << "Invalid format";
return 1;
}
}
// Gets the width of a block for a given format.
unsigned int GetBlockSizeX(Format format) {
switch (format) {
case kXRGB8:
case kARGB8:
case kABGR16F:
case kR32F:
case kABGR32F:
return 1;
case kDXT1:
return 4;
case kUnknown:
default:
// TODO(petersont): Add DXT3/5 support.
LOG(FATAL) << "Invalid format";
return 1;
}
}
// Gets the height of a block for a given format.
unsigned int GetBlockSizeY(Format format) {
// NOTE: currently only supported formats use square blocks.
return GetBlockSizeX(format);
}
} // namespace texture
namespace effect_param {
// Gets the size of the data of a given parameter type.
unsigned int GetDataSize(DataType type) {
switch (type) {
case kUnknown:
return 0;
case kFloat1:
return sizeof(float); // NOLINT
case kFloat2:
return sizeof(float) * 2; // NOLINT
case kFloat3:
return sizeof(float) * 3; // NOLINT
case kFloat4:
return sizeof(float) * 4; // NOLINT
case kMatrix4:
return sizeof(float) * 16; // NOLINT
case kInt:
return sizeof(int); // NOLINT
case kBool:
return sizeof(bool); // NOLINT
case kSampler:
return sizeof(ResourceId); // NOLINT
case kTexture:
return sizeof(ResourceId); // NOLINT
case kNumTypes:
case kMake32Bit:
default:
LOG(FATAL) << "Invalid type.";
return 0;
}
}
} // namespace effect_param
} // namespace gpu
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