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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/Assertions.h"
#include "WebGLElementArrayCache.h"
#include <cstdio>
#include <cstdlib>
#include "nscore.h"
#include "nsTArray.h"
void
MakeRandomVector(nsTArray<uint8_t>& a, size_t size)
{
a.SetLength(size);
// only the most-significant bits of rand() are reasonably random.
// RAND_MAX can be as low as 0x7fff, and we need 8 bits for the result, so we can only
// ignore the 7 least significant bits.
for (size_t i = 0; i < size; i++)
a[i] = static_cast<uint8_t>((unsigned int)(rand()) >> 7);
}
template<typename T>
T
RandomInteger(T a, T b)
{
T result(a + rand() % (b - a + 1));
return result;
}
template<typename T>
GLenum
GLType()
{
switch (sizeof(T)) {
case 4: return LOCAL_GL_UNSIGNED_INT;
case 2: return LOCAL_GL_UNSIGNED_SHORT;
case 1: return LOCAL_GL_UNSIGNED_BYTE;
default:
MOZ_RELEASE_ASSERT(false);
return 0;
}
}
void
CheckValidate(bool expectSuccess, mozilla::WebGLElementArrayCache& c, GLenum type,
uint32_t maxAllowed, size_t first, size_t count)
{
const bool success = c.Validate(type, maxAllowed, first, count);
ASSERT_TRUE(success == expectSuccess);
}
template<typename T>
void
CheckValidateOneTypeVariousBounds(mozilla::WebGLElementArrayCache& c, size_t firstByte,
size_t countBytes)
{
size_t first = firstByte / sizeof(T);
size_t count = countBytes / sizeof(T);
GLenum type = GLType<T>();
T max = 0;
for (size_t i = 0; i < count; i++)
if (c.Element<T>(first + i) > max)
max = c.Element<T>(first + i);
CheckValidate(true, c, type, max, first, count);
CheckValidate(true, c, type, T(-1), first, count);
if (T(max + 1)) CheckValidate(true, c, type, T(max + 1), first, count);
if (max > 0) {
CheckValidate(false, c, type, max - 1, first, count);
CheckValidate(false, c, type, 0, first, count);
}
}
void CheckValidateAllTypes(mozilla::WebGLElementArrayCache& c, size_t firstByte,
size_t countBytes)
{
CheckValidateOneTypeVariousBounds<uint8_t>(c, firstByte, countBytes);
CheckValidateOneTypeVariousBounds<uint16_t>(c, firstByte, countBytes);
CheckValidateOneTypeVariousBounds<uint32_t>(c, firstByte, countBytes);
}
template<typename T>
void
CheckSanity()
{
const size_t numElems = 64; // should be significantly larger than tree leaf size to
// ensure we exercise some nontrivial tree-walking
T data[numElems] = {1,0,3,1,2,6,5,4}; // intentionally specify only 8 elements for now
size_t numBytes = numElems * sizeof(T);
ASSERT_TRUE(numBytes == sizeof(data));
GLenum type = GLType<T>();
mozilla::WebGLElementArrayCache c;
c.BufferData(data, numBytes);
CheckValidate(true, c, type, 6, 0, 8);
CheckValidate(false, c, type, 5, 0, 8);
CheckValidate(true, c, type, 3, 0, 3);
CheckValidate(false, c, type, 2, 0, 3);
CheckValidate(true, c, type, 6, 2, 4);
CheckValidate(false, c, type, 5, 2, 4);
c.BufferSubData(5*sizeof(T), data, sizeof(T));
CheckValidate(true, c, type, 5, 0, 8);
CheckValidate(false, c, type, 4, 0, 8);
// now test a somewhat larger size to ensure we exceed the size of a tree leaf
for(size_t i = 0; i < numElems; i++)
data[i] = numElems - i;
c.BufferData(data, numBytes);
CheckValidate(true, c, type, numElems, 0, numElems);
CheckValidate(false, c, type, numElems - 1, 0, numElems);
ASSERT_TRUE(numElems > 10);
CheckValidate(true, c, type, numElems - 10, 10, numElems - 10);
CheckValidate(false, c, type, numElems - 11, 10, numElems - 10);
}
template<typename T>
void
CheckUintOverflow()
{
// This test is only for integer types smaller than uint32_t
static_assert(sizeof(T) < sizeof(uint32_t), "This test is only for integer types \
smaller than uint32_t");
const size_t numElems = 64; // should be significantly larger than tree leaf size to
// ensure we exercise some nontrivial tree-walking
T data[numElems];
size_t numBytes = numElems * sizeof(T);
ASSERT_TRUE(numBytes == sizeof(data));
GLenum type = GLType<T>();
mozilla::WebGLElementArrayCache c;
for(size_t i = 0; i < numElems; i++)
data[i] = numElems - i;
c.BufferData(data, numBytes);
// bug 825205
uint32_t bigValWrappingToZero = uint32_t(T(-1)) + 1;
CheckValidate(true, c, type, bigValWrappingToZero, 0, numElems);
CheckValidate(true, c, type, bigValWrappingToZero - 1, 0, numElems);
CheckValidate(false, c, type, 0, 0, numElems);
}
TEST(WebGLElementArrayCache, Test)
{
srand(0); // do not want a random seed here.
CheckSanity<uint8_t>();
CheckSanity<uint16_t>();
CheckSanity<uint32_t>();
CheckUintOverflow<uint8_t>();
CheckUintOverflow<uint16_t>();
nsTArray<uint8_t> v, vsub;
mozilla::WebGLElementArrayCache b;
for (int maxBufferSize = 1; maxBufferSize <= 4096; maxBufferSize *= 2) {
// See bug 800612. We originally had | repeat = min(maxBufferSize, 20) |
// and a real bug was only caught on Windows and not on Linux due to rand()
// producing different values. In that case, the minimum value by which to replace
// this 20 to reproduce the bug on Linux, was 25. Replacing it with 64 should give
// us some comfort margin.
int repeat = std::min(maxBufferSize, 64);
for (int i = 0; i < repeat; i++) {
size_t size = RandomInteger<size_t>(0, maxBufferSize);
MakeRandomVector(v, size);
b.BufferData(v.Elements(), size);
CheckValidateAllTypes(b, 0, size);
for (int j = 0; j < 16; j++) {
for (int bufferSubDataCalls = 1; bufferSubDataCalls <= 8; bufferSubDataCalls *= 2) {
for (int validateCalls = 1; validateCalls <= 8; validateCalls *= 2) {
size_t offset = 0, subsize = 0;
for (int k = 0; k < bufferSubDataCalls; k++) {
offset = RandomInteger<size_t>(0, size);
subsize = RandomInteger<size_t>(0, size - offset);
MakeRandomVector(vsub, subsize);
b.BufferSubData(offset, vsub.Elements(), subsize);
}
for (int k = 0; k < validateCalls; k++) {
offset = RandomInteger<size_t>(0, size);
subsize = RandomInteger<size_t>(0, size - offset);
CheckValidateAllTypes(b, offset, subsize);
}
} // validateCalls
} // bufferSubDataCalls
} // j
} // i
} // maxBufferSize
}
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