Fix a minor bug in compressedTex{Sub}Image in blink.

third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.cpp

 // Copyright 2015 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 "modules/webgl/WebGL2RenderingContextBase.h"
 
 #include "bindings/modules/v8/WebGLAny.h"
 #include "core/dom/DOMException.h"
 #include "core/frame/ImageBitmap.h"
 #include "core/html/HTMLCanvasElement.h"
@@ skipping 1992 matching lines @@
   if (srcOffset > data->byteLength()) {
     synthesizeGLError(GL_INVALID_VALUE, "compressedTexImage2D",
                       "srcOffset is out of range");
     return;
   }
   if (srcLengthOverride == 0) {
     srcLengthOverride = data->byteLength() - srcOffset;
   } else if (srcLengthOverride > data->byteLength() - srcOffset) {
     synthesizeGLError(GL_INVALID_VALUE, "compressedTexImage2D",
                       "srcLengthOverride is out of range");
+    return;
   }
   contextGL()->CompressedTexImage2D(
       target, level, internalformat, width, height, border, srcLengthOverride,
       static_cast<uint8_t*>(data->baseAddress()) + srcOffset);
 }
 
 void WebGL2RenderingContextBase::compressedTexSubImage2D(
     GLenum target,
     GLint level,
     GLint xoffset,
@@ skipping 26 matching lines @@
   if (srcOffset > data->byteLength()) {
     synthesizeGLError(GL_INVALID_VALUE, "compressedTexSubImage2D",
                       "srcOffset is out of range");
     return;
   }
   if (srcLengthOverride == 0) {
     srcLengthOverride = data->byteLength() - srcOffset;
   } else if (srcLengthOverride > data->byteLength() - srcOffset) {
     synthesizeGLError(GL_INVALID_VALUE, "compressedTexImage2D",
                       "srcLengthOverride is out of range");
+    return;
   }
   contextGL()->CompressedTexSubImage2D(
       target, level, xoffset, yoffset, width, height, format, srcLengthOverride,
       static_cast<uint8_t*>(data->baseAddress()) + srcOffset);
 }
 
 void WebGL2RenderingContextBase::compressedTexImage3D(
     GLenum target,
     GLint level,
     GLenum internalformat,
@@ skipping 13 matching lines @@
   if (srcOffset > data->byteLength()) {
     synthesizeGLError(GL_INVALID_VALUE, "compressedTexImage3D",
                       "srcOffset is out of range");
     return;
   }
   if (srcLengthOverride == 0) {
     srcLengthOverride = data->byteLength() - srcOffset;
   } else if (srcLengthOverride > data->byteLength() - srcOffset) {
     synthesizeGLError(GL_INVALID_VALUE, "compressedTexImage3D",
                       "srcLengthOverride is out of range");
+    return;
   }
   contextGL()->CompressedTexImage3D(
       target, level, internalformat, width, height, depth, border,
       srcLengthOverride,
       static_cast<uint8_t*>(data->baseAddress()) + srcOffset);
 }
 
 void WebGL2RenderingContextBase::compressedTexSubImage3D(
     GLenum target,
     GLint level,
@@ skipping 16 matching lines @@
   if (srcOffset > data->byteLength()) {
     synthesizeGLError(GL_INVALID_VALUE, "compressedTexSubImage3D",
                       "srcOffset is out of range");
     return;
   }
   if (srcLengthOverride == 0) {
     srcLengthOverride = data->byteLength() - srcOffset;
   } else if (srcLengthOverride > data->byteLength() - srcOffset) {
     synthesizeGLError(GL_INVALID_VALUE, "compressedTexSubImage3D",
                       "srcLengthOverride is out of range");
+    return;
   }
   contextGL()->CompressedTexSubImage3D(
       target, level, xoffset, yoffset, zoffset, width, height, depth, format,
       srcLengthOverride,
       static_cast<uint8_t*>(data->baseAddress()) + srcOffset);
 }
 
 GLint WebGL2RenderingContextBase::getFragDataLocation(WebGLProgram* program,
                                                       const String& name) {
   if (isContextLost() || !validateWebGLObject("getFragDataLocation", program))
@@ skipping 2827 matching lines @@
 
 void WebGL2RenderingContextBase::
     DrawingBufferClientRestorePixelUnpackBufferBinding() {
   if (!contextGL())
     return;
   contextGL()->BindBuffer(GL_PIXEL_UNPACK_BUFFER,
                           objectOrZero(m_boundPixelUnpackBuffer.get()));
 }
 
 }  // namespace blink