1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/webgl/webgl_multi_draw_common.h"
#include "third_party/blink/renderer/modules/webgl/webgl_rendering_context_base.h"
namespace blink {
bool WebGLMultiDrawCommon::ValidateDrawcount(
WebGLExtensionScopedContext* scoped,
const char* function_name,
GLsizei drawcount) {
if (drawcount < 0) {
scoped->Context()->SynthesizeGLError(GL_INVALID_VALUE, function_name,
"negative drawcount");
return false;
}
constexpr size_t kMaxIntsReadPerDrawCall =
WebGLRenderingContextBase::kMaximumSupportedArrayBufferSize /
sizeof(int32_t);
if (static_cast<size_t>(drawcount) > kMaxIntsReadPerDrawCall) {
scoped->Context()->SynthesizeGLError(
GL_INVALID_VALUE, function_name,
"data touched by drawcount exceeds maximum ArrayBuffer size");
return false;
}
return true;
}
bool WebGLMultiDrawCommon::ValidateArray(WebGLExtensionScopedContext* scoped,
const char* function_name,
const char* outOfBoundsDescription,
size_t size,
GLuint offset,
GLsizei drawcount) {
if (static_cast<uint32_t>(drawcount) > size) {
scoped->Context()->SynthesizeGLError(GL_INVALID_OPERATION, function_name,
"drawcount out of bounds");
return false;
}
if (offset >= size) {
scoped->Context()->SynthesizeGLError(GL_INVALID_OPERATION, function_name,
outOfBoundsDescription);
return false;
}
if (static_cast<uint64_t>(drawcount) + offset > size) {
scoped->Context()->SynthesizeGLError(GL_INVALID_OPERATION, function_name,
"drawcount plus offset out of bounds");
return false;
}
return true;
}
} // namespace blink
|
