command_buffer: Implement path rendering functions for CHROMIUM_path_rendering

ui/gl/generate_bindings.py

Index: ui/gl/generate_bindings.py
diff --git a/ui/gl/generate_bindings.py b/ui/gl/generate_bindings.py
index d40be26a9178519fd7a366dd7a2c38f20dd61210..a133454a63a7af9313f04d7754dbb842cb8980ce 100755
--- a/ui/gl/generate_bindings.py
+++ b/ui/gl/generate_bindings.py
@@ -35,9 +35,14 @@ array instead of the names array. Each version has the following keys:
    extensions: Extra Extensions for which the function is bound. Only needed
                in some cases where the extension cannot be parsed from the
                headers.
+   is_optional: Set to True if the function might be missing even if
+                the the extension string is present. This can happen
+                when the extension is updated with new functions, but
+                the extension string does not change.
 
 By default, the function gets its name from the first name in its names or
 versions array. This can be overridden by supplying a 'known_as' key.
+
 """
 GL_FUNCTIONS = [
 { 'return_type': 'void',
@@ -234,6 +239,12 @@ GL_FUNCTIONS = [
   'arguments':
       'GLenum target, GLint level, GLint xoffset, GLint yoffset, '
       'GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height', },
+{ 'return_type': 'void',
+  'names': ['glCoverFillPathNV'],
+  'arguments': 'GLuint path, GLenum coverMode' },
+{ 'return_type': 'void',
+  'names': ['glCoverStrokePathNV'],
+  'arguments': 'GLuint name, GLenum coverMode' },
 { 'return_type': 'GLuint',
   'names': ['glCreateProgram'],
   'arguments': 'void', },
@@ -259,6 +270,9 @@ GL_FUNCTIONS = [
   'names': ['glDeleteFramebuffersEXT', 'glDeleteFramebuffers'],
   'arguments': 'GLsizei n, const GLuint* framebuffers', },
 { 'return_type': 'void',
+  'names': ['glDeletePathsNV'],
+  'arguments': 'GLuint path, GLsizei range' },
+{ 'return_type': 'void',
   'names': ['glDeleteProgram'],
   'arguments': 'GLuint program', },
 { 'return_type': 'void',
@@ -437,6 +451,9 @@ GL_FUNCTIONS = [
 { 'return_type': 'void',
   'names': ['glGenFramebuffersEXT', 'glGenFramebuffers'],
   'arguments': 'GLsizei n, GLuint* framebuffers', },
+{ 'return_type': 'GLuint',
+  'names': ['glGenPathsNV'],
+  'arguments': 'GLsizei range' },
 { 'return_type': 'void',
   'versions': [{ 'name': 'glGenQueries' },
                { 'name': 'glGenQueriesARB', },
@@ -704,6 +721,9 @@ GL_FUNCTIONS = [
   'names': ['glIsFramebufferEXT', 'glIsFramebuffer'],
   'arguments': 'GLuint framebuffer', },
 { 'return_type': 'GLboolean',
+  'names': ['glIsPathNV'],
+  'arguments': 'GLuint path' },
+{ 'return_type': 'GLboolean',
   'names': ['glIsProgram'],
   'arguments': 'GLuint program', },
 { 'return_type': 'GLboolean',
@@ -770,6 +790,19 @@ GL_FUNCTIONS = [
                                 'GL_NV_path_rendering'] },],
   'arguments': 'GLenum matrixMode' },
 { 'return_type': 'void',
+  'names': ['glPathCommandsNV'],
+  'arguments': 'GLuint path, GLsizei numCommands, const GLubyte* commands, '
+  'GLsizei numCoords, GLenum coordType, const GLvoid* coords' },
+{ 'return_type': 'void',
+  'names': ['glPathParameterfNV'],
+  'arguments': 'GLuint path, GLenum pname, GLfloat value' },
+{ 'return_type': 'void',
+  'names': ['glPathParameteriNV'],
+  'arguments': 'GLuint path, GLenum pname, GLint value' },
+{ 'return_type': 'void',
+  'names': ['glPathStencilFuncNV'],
+  'arguments': 'GLenum func, GLint ref, GLuint mask' },
+{ 'return_type': 'void',
   'versions': [{ 'name': 'glPauseTransformFeedback' }],
   'arguments': 'void', },
 { 'return_type': 'void',
@@ -888,6 +921,9 @@ GL_FUNCTIONS = [
   });
 """, },
 { 'return_type': 'void',
+  'names': ['glStencilFillPathNV'],
+  'arguments': 'GLuint path, GLenum fillMode, GLuint mask' },
+{ 'return_type': 'void',
   'names': ['glStencilFunc'],
   'arguments': 'GLenum func, GLint ref, GLuint mask', },
 { 'return_type': 'void',
@@ -905,6 +941,17 @@ GL_FUNCTIONS = [
 { 'return_type': 'void',
   'names': ['glStencilOpSeparate'],
   'arguments': 'GLenum face, GLenum fail, GLenum zfail, GLenum zpass', },
+{ 'return_type': 'void',
+  'names': ['glStencilStrokePathNV'],
+  'arguments': 'GLuint path, GLint reference, GLuint mask' },
+{ 'return_type': 'void',
+  'names': ['glStencilThenCoverFillPathNV'],
+  'arguments': 'GLuint path, GLenum fillMode, GLuint mask, GLenum coverMode',
+  'is_optional': True, },
+{ 'return_type': 'void',
+  'names': ['glStencilThenCoverStrokePathNV'],
+  'arguments': 'GLuint path, GLint reference, GLuint mask, GLenum coverMode',
+  'is_optional': True, },
 { 'return_type': 'GLboolean',
   'known_as': 'glTestFenceAPPLE',
   'versions': [{ 'name': 'glTestFenceAPPLE',
@@ -1892,7 +1939,8 @@ namespace gfx {
         file.write('  else if (%s) {\n  ' % (cond))
 
       WriteFuncBinding(file, known_as, version['name'])
-      file.write('DCHECK(fn.%sFn);\n' % known_as)
+      if not 'is_optional' in func or not func['is_optional']:
+        file.write('DCHECK(fn.%sFn);\n' % known_as)
       file.write('}\n')
       i += 1
       first_version = False