Implement WebGL2's uniform*() with sub source.

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

 // 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.
 
 typedef long long GLint64;
 typedef unsigned long long GLuint64;
 
 [
     NoInterfaceObject,
 ] interface WebGL2RenderingContextBase {
@@ skipping 340 matching lines @@
                                  GLsizei imageSize, GLintptr offset);
 
     /* Programs and shaders */
     GLint getFragDataLocation(WebGLProgram program, DOMString name);
 
     /* Uniforms and attributes */
     void uniform1ui(WebGLUniformLocation? location, GLuint v0);
     void uniform2ui(WebGLUniformLocation? location, GLuint v0, GLuint v1);
     void uniform3ui(WebGLUniformLocation? location, GLuint v0, GLuint v1, GLuint v2);
     void uniform4ui(WebGLUniformLocation? location, GLuint v0, GLuint v1, GLuint v2, GLuint v3);
-    void uniform1uiv(WebGLUniformLocation? location, [FlexibleArrayBufferView] Uint32Array v);
-    void uniform1uiv(WebGLUniformLocation? location, sequence<GLuint> v);
-    void uniform2uiv(WebGLUniformLocation? location, [FlexibleArrayBufferView] Uint32Array v);
-    void uniform2uiv(WebGLUniformLocation? location, sequence<GLuint> v);
-    void uniform3uiv(WebGLUniformLocation? location, [FlexibleArrayBufferView] Uint32Array v);
-    void uniform3uiv(WebGLUniformLocation? location, sequence<GLuint> v);
-    void uniform4uiv(WebGLUniformLocation? location, [FlexibleArrayBufferView] Uint32Array v);
-    void uniform4uiv(WebGLUniformLocation? location, sequence<GLuint> v);
-    void uniformMatrix2x3fv(WebGLUniformLocation? location, GLboolean transpose, Float32Array value);
-    void uniformMatrix2x3fv(WebGLUniformLocation? location, GLboolean transpose, sequence<GLfloat> value);
-    void uniformMatrix3x2fv(WebGLUniformLocation? location, GLboolean transpose, Float32Array value);
-    void uniformMatrix3x2fv(WebGLUniformLocation? location, GLboolean transpose, sequence<GLfloat> value);
-    void uniformMatrix2x4fv(WebGLUniformLocation? location, GLboolean transpose, Float32Array value);
-    void uniformMatrix2x4fv(WebGLUniformLocation? location, GLboolean transpose, sequence<GLfloat> value);
-    void uniformMatrix4x2fv(WebGLUniformLocation? location, GLboolean transpose, Float32Array value);
-    void uniformMatrix4x2fv(WebGLUniformLocation? location, GLboolean transpose, sequence<GLfloat> value);
-    void uniformMatrix3x4fv(WebGLUniformLocation? location, GLboolean transpose, Float32Array value);
-    void uniformMatrix3x4fv(WebGLUniformLocation? location, GLboolean transpose, sequence<GLfloat> value);
-    void uniformMatrix4x3fv(WebGLUniformLocation? location, GLboolean transpose, Float32Array value);
-    void uniformMatrix4x3fv(WebGLUniformLocation? location, GLboolean transpose, sequence<GLfloat> value);
+    // The WebGL1 uniform*v signatures are visible here, so srcOffset has to be non-optional
+    // to avoid conflicts. The effect is the same: if uniform*v is called with only two arguments,
+    // it goes to the WebGL1 signatures; if it's called with three or four arguments, it goes to
+    // the WebGL2 specific signatures.
+    void uniform1fv(WebGLUniformLocation? location, [FlexibleArrayBufferView] Float32Array v,
+                    GLuint srcOffset, optional GLuint srcLength = 0);
+    void uniform1fv(WebGLUniformLocation? location, sequence<GLfloat> v,
+                    GLuint srcOffset, optional GLuint srcLength = 0);
+    void uniform2fv(WebGLUniformLocation? location, [FlexibleArrayBufferView] Float32Array v,
+                    GLuint srcOffset, optional GLuint srcLength = 0);
+    void uniform2fv(WebGLUniformLocation? location, sequence<GLfloat> v,
+                    GLuint srcOffset, optional GLuint srcLength = 0);
+    void uniform3fv(WebGLUniformLocation? location, [FlexibleArrayBufferView] Float32Array v,
+                    GLuint srcOffset, optional GLuint srcLength = 0);
+    void uniform3fv(WebGLUniformLocation? location, sequence<GLfloat> v,
+                    GLuint srcOffset, optional GLuint srcLength = 0);
+    void uniform4fv(WebGLUniformLocation? location, [FlexibleArrayBufferView] Float32Array v,
+                    GLuint srcOffset, optional GLuint srcLength = 0);
+    void uniform4fv(WebGLUniformLocation? location, sequence<GLfloat> v,
+                    GLuint srcOffset, optional GLuint srcLength = 0);
+    void uniform1iv(WebGLUniformLocation? location, [FlexibleArrayBufferView] Int32Array v,
+                    GLuint srcOffset, optional GLuint srcLength = 0);
+    void uniform1iv(WebGLUniformLocation? location, sequence<GLint> v,
+                    GLuint srcOffset, optional GLuint srcLength = 0);
+    void uniform2iv(WebGLUniformLocation? location, [FlexibleArrayBufferView] Int32Array v,
+                    GLuint srcOffset, optional GLuint srcLength = 0);
+    void uniform2iv(WebGLUniformLocation? location, sequence<GLint> v,
+                    GLuint srcOffset, optional GLuint srcLength = 0);
+    void uniform3iv(WebGLUniformLocation? location, [FlexibleArrayBufferView] Int32Array v,
+                    GLuint srcOffset, optional GLuint srcLength = 0);
+    void uniform3iv(WebGLUniformLocation? location, sequence<GLint> v,
+                    GLuint srcOffset, optional GLuint srcLength = 0);
+    void uniform4iv(WebGLUniformLocation? location, [FlexibleArrayBufferView] Int32Array v,
+                    GLuint srcOffset, optional GLuint srcLength = 0);
+    void uniform4iv(WebGLUniformLocation? location, sequence<GLint> v,
+                    GLuint srcOffset, optional GLuint srcLength = 0);
+    void uniform1uiv(WebGLUniformLocation? location, [FlexibleArrayBufferView] Uint32Array v,
+                     optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+    void uniform1uiv(WebGLUniformLocation? location, sequence<GLuint> v,
+                     optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+    void uniform2uiv(WebGLUniformLocation? location, [FlexibleArrayBufferView] Uint32Array v,
+                     optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+    void uniform2uiv(WebGLUniformLocation? location, sequence<GLuint> v,
+                     optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+    void uniform3uiv(WebGLUniformLocation? location, [FlexibleArrayBufferView] Uint32Array v,
+                     optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+    void uniform3uiv(WebGLUniformLocation? location, sequence<GLuint> v,
+                     optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+    void uniform4uiv(WebGLUniformLocation? location, [FlexibleArrayBufferView] Uint32Array v,
+                     optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+    void uniform4uiv(WebGLUniformLocation? location, sequence<GLuint> v,
+                     optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+    void uniformMatrix2fv(WebGLUniformLocation? location, GLboolean transpose, Float32Array array,
+                          GLuint srcOffset, optional GLuint srcLength = 0);
+    void uniformMatrix2fv(WebGLUniformLocation? location, GLboolean transpose, sequence<GLfloat> array,
+                          GLuint srcOffset, optional GLuint srcLength = 0);
+    void uniformMatrix3fv(WebGLUniformLocation? location, GLboolean transpose, Float32Array array,
+                          GLuint srcOffset, optional GLuint srcLength = 0);
+    void uniformMatrix3fv(WebGLUniformLocation? location, GLboolean transpose, sequence<GLfloat> array,
+                          GLuint srcOffset, optional GLuint srcLength = 0);
+    void uniformMatrix4fv(WebGLUniformLocation? location, GLboolean transpose, Float32Array array,
+                          GLuint srcOffset, optional GLuint srcLength = 0);
+    void uniformMatrix4fv(WebGLUniformLocation? location, GLboolean transpose, sequence<GLfloat> array,
+                          GLuint srcOffset, optional GLuint srcLength = 0);
+    void uniformMatrix2x3fv(WebGLUniformLocation? location, GLboolean transpose, Float32Array value,
+                            optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+    void uniformMatrix2x3fv(WebGLUniformLocation? location, GLboolean transpose, sequence<GLfloat> value,
+                            optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+    void uniformMatrix3x2fv(WebGLUniformLocation? location, GLboolean transpose, Float32Array value,
+                            optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+    void uniformMatrix3x2fv(WebGLUniformLocation? location, GLboolean transpose, sequence<GLfloat> value,
+                            optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+    void uniformMatrix2x4fv(WebGLUniformLocation? location, GLboolean transpose, Float32Array value,
+                            optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+    void uniformMatrix2x4fv(WebGLUniformLocation? location, GLboolean transpose, sequence<GLfloat> value,
+                            optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+    void uniformMatrix4x2fv(WebGLUniformLocation? location, GLboolean transpose, Float32Array value,
+                            optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+    void uniformMatrix4x2fv(WebGLUniformLocation? location, GLboolean transpose, sequence<GLfloat> value,
+                            optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+    void uniformMatrix3x4fv(WebGLUniformLocation? location, GLboolean transpose, Float32Array value,
+                            optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+    void uniformMatrix3x4fv(WebGLUniformLocation? location, GLboolean transpose, sequence<GLfloat> value,
+                            optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+    void uniformMatrix4x3fv(WebGLUniformLocation? location, GLboolean transpose, Float32Array value,
+                            optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+    void uniformMatrix4x3fv(WebGLUniformLocation? location, GLboolean transpose, sequence<GLfloat> value,
+                            optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
 
     void vertexAttribI4i(GLuint index, GLint x, GLint y, GLint z, GLint w);
     void vertexAttribI4iv(GLuint index, Int32Array v);
     void vertexAttribI4iv(GLuint index, sequence<GLint> v);
     void vertexAttribI4ui(GLuint index, GLuint x, GLuint y, GLuint z, GLuint w);
     void vertexAttribI4uiv(GLuint index, Uint32Array v);
     void vertexAttribI4uiv(GLuint index, sequence<GLuint> v);
     void vertexAttribIPointer(GLuint index, GLint size, GLenum type, GLsizei stride, GLintptr offset);
 
     /* Writing to the drawing buffer */
@@ skipping 66 matching lines @@
     WebGLVertexArrayObject? createVertexArray();
     void deleteVertexArray(WebGLVertexArrayObject? vertexArray);
     GLboolean isVertexArray(WebGLVertexArrayObject? vertexArray);
     void bindVertexArray(WebGLVertexArrayObject? vertexArray);
 
     /* Reading */
     void readPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, ArrayBufferView dstData, GLintptr offset);
     void readPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLintptr offset);
 };
 WebGL2RenderingContextBase implements WebGLRenderingContextBase;