Validate internalformat/format/type for uploading DOM elements to texture

third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.h

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 841 matching lines @@
     WebGLTexture* validateTextureBinding(const char* functionName, GLenum target);
 
     // Wrapper function for validateTexture2D(3D)Binding, used in texImageHelper functions.
     virtual WebGLTexture* validateTexImageBinding(const char*, TexImageFunctionID, GLenum);
 
     // Helper function to check texture 2D target and texture bound to the target.
     // Generate GL errors and return 0 if target is invalid or texture bound is
     // null.  Otherwise, return the texture bound to the target.
     WebGLTexture* validateTexture2DBinding(const char* functionName, GLenum target);
 
+    enum TexFuncValidationSourceType {
+        SourceArrayBufferView,
+        SourceImageData,
+        SourceHTMLImageElement,
+        SourceHTMLCanvasElement,
+        SourceHTMLVideoElement,
+        SourceImageBitmap,
+        SourceUnpackBuffer,
+    };
+
     // Helper function to check input internalformat/format/type for functions {copy}Tex{Sub}Image.
     // Generates GL error and returns false if parameters are invalid.
-    bool validateTexFuncFormatAndType(const char* functionName, TexImageFunctionType, GLenum internalformat, GLenum format, GLenum type, GLint level);
+    bool validateTexFuncFormatAndType(const char* functionName, TexImageFunctionType, TexFuncValidationSourceType, GLenum internalformat, GLenum format, GLenum type, GLint level);
 
     // Helper function to check readbuffer validity for copyTex{Sub}Image.
     // If yes, obtains the bound read framebuffer, returns true.
     // If not, generates a GL error, returns false.
     bool validateReadBufferAndGetInfo(const char* functionName, WebGLFramebuffer*& readFramebufferBinding);
 
     // Helper function to check format/type and ArrayBuffer view type for readPixels.
     // Generates INVALID_ENUM and returns false if parameters are invalid.
     // Generates INVALID_OPERATION if ArrayBuffer view type is incompatible with type.
     virtual bool validateReadPixelsFormatAndType(GLenum format, GLenum type, DOMArrayBufferView*);
 
     // Helper function to check parameters of readPixels. Returns true if all parameters
     // are valid. Otherwise, generates appropriate error and returns false.
     bool validateReadPixelsFuncParameters(GLsizei width, GLsizei height, GLenum format, GLenum type, DOMArrayBufferView*, long long bufferSize);
 
     virtual GLint getMaxTextureLevelForTarget(GLenum target);
 
     // Helper function to check input level for functions {copy}Tex{Sub}Image.
     // Generates GL error and returns false if level is invalid.
     bool validateTexFuncLevel(const char* functionName, GLenum target, GLint level);
 
     // Helper function to check if a 64-bit value is non-negative and can fit into a 32-bit integer.
     // Generates GL error and returns false if not.
     bool validateValueFitNonNegInt32(const char* functionName, const char* paramName, long long value);
 
-    enum TexFuncValidationSourceType {
-        SourceArrayBufferView,
-        SourceImageData,
-        SourceHTMLImageElement,
-        SourceHTMLCanvasElement,
-        SourceHTMLVideoElement,
-        SourceImageBitmap,
-        SourceUnpackBuffer,
-    };
-
     // Helper function for tex{Sub}Image{2|3}D to check if the input format/type/level/target/width/height/depth/border/xoffset/yoffset/zoffset are valid.
     // Otherwise, it would return quickly without doing other work.
     bool validateTexFunc(const char* functionName, TexImageFunctionType, TexFuncValidationSourceType, GLenum target, GLint level, GLenum internalformat, GLsizei width,
         GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, GLint xoffset, GLint yoffset, GLint zoffset);
 
     // Helper function to check input width and height for functions {copy, compressed}Tex{Sub}Image.
     // Generates GL error and returns false if width or height is invalid.
     bool validateTexFuncDimensions(const char* functionName, TexImageFunctionType, GLenum target, GLint level, GLsizei width, GLsizei height, GLsizei depth);
 
     // Helper function to check input parameters for functions {copy}Tex{Sub}Image.
     // Generates GL error and returns false if parameters are invalid.
-    bool validateTexFuncParameters(const char* functionName, TexImageFunctionType, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type);
+    bool validateTexFuncParameters(const char* functionName, TexImageFunctionType, TexFuncValidationSourceType, GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type);
 
     enum NullDisposition {
         NullAllowed,
         NullNotAllowed,
         NullNotReachable
     };
 
     // Helper function to validate that the given ArrayBufferView
     // is of the correct type and contains enough data for the texImage call.
     // Generates GL error and returns false if parameters are invalid.
@@ skipping 186 matching lines @@
     bool isPaintable() const final { return drawingBuffer(); }
 };
 
 DEFINE_TYPE_CASTS(WebGLRenderingContextBase, CanvasRenderingContext, context, context->is3d(), context.is3d());
 
 } // namespace blink
 
 WTF_ALLOW_MOVE_INIT_AND_COMPARE_WITH_MEM_FUNCTIONS(blink::WebGLRenderingContextBase::TextureUnitState);
 
 #endif // WebGLRenderingContextBase_h