Clean up resolving of OpenGL functions on Windows

Always try both e/wglGetProcAddress and ::GetProcAddress to
resolve the methods. Like this QOpengGLContext::getProcAddress is
able to return any OpenGL entry point, and we can both simplify
the code we have in the QPA backend as well as get rid of windows
specific code paths in Qt Gui.

Task-number: QTBUG-39531
Change-Id: I1ddf1b0974f69b56b219a619655b723eb0134b14
Reviewed-by: Laszlo Agocs <laszlo.agocs@theqtcompany.com>

1 files changed, 1 insertions, 47 deletions

diff --git a/src/plugins/platforms/windows/qwindowsglcontext.h b/src/plugins/platforms/windows/qwindowsglcontext.h
index a0fc31227e..e8c78860f2 100644
--- a/src/plugins/platforms/windows/qwindowsglcontext.h
+++ b/src/plugins/platforms/windows/qwindowsglcontext.h
@@ -118,58 +118,12 @@ struct QWindowsOpengl32DLL
     BOOL (WINAPI * wglShareLists)(HGLRC context1, HGLRC context2);
 
     // GL1+GLES2 common
-    void (APIENTRY * glBindTexture)(GLenum target, GLuint texture);
-    void (APIENTRY * glBlendFunc)(GLenum sfactor, GLenum dfactor);
-    void (APIENTRY * glClear)(GLbitfield mask);
-    void (APIENTRY * glClearColor)(GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);
-    void (APIENTRY * glClearStencil)(GLint s);
-    void (APIENTRY * glColorMask)(GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha);
-    void (APIENTRY * glCopyTexImage2D)(GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border);
-    void (APIENTRY * glCopyTexSubImage2D)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
-    void (APIENTRY * glCullFace)(GLenum mode);
-    void (APIENTRY * glDeleteTextures)(GLsizei n, const GLuint* textures);
-    void (APIENTRY * glDepthFunc)(GLenum func);
-    void (APIENTRY * glDepthMask)(GLboolean flag);
-    void (APIENTRY * glDisable)(GLenum cap);
-    void (APIENTRY * glDrawArrays)(GLenum mode, GLint first, GLsizei count);
-    void (APIENTRY * glDrawElements)(GLenum mode, GLsizei count, GLenum type, const GLvoid* indices);
-    void (APIENTRY * glEnable)(GLenum cap);
-    void (APIENTRY * glFinish)();
-    void (APIENTRY * glFlush)();
-    void (APIENTRY * glFrontFace)(GLenum mode);
-    void (APIENTRY * glGenTextures)(GLsizei n, GLuint* textures);
-    void (APIENTRY * glGetBooleanv)(GLenum pname, GLboolean* params);
     GLenum (APIENTRY * glGetError)();
-    void (APIENTRY * glGetFloatv)(GLenum pname, GLfloat* params);
     void (APIENTRY * glGetIntegerv)(GLenum pname, GLint* params);
     const GLubyte * (APIENTRY * glGetString)(GLenum name);
-    void (APIENTRY * glGetTexParameterfv)(GLenum target, GLenum pname, GLfloat* params);
-    void (APIENTRY * glGetTexParameteriv)(GLenum target, GLenum pname, GLint* params);
-    void (APIENTRY * glHint)(GLenum target, GLenum mode);
-    GLboolean (APIENTRY * glIsEnabled)(GLenum cap);
-    GLboolean (APIENTRY * glIsTexture)(GLuint texture);
-    void (APIENTRY * glLineWidth)(GLfloat width);
-    void (APIENTRY * glPixelStorei)(GLenum pname, GLint param);
-    void (APIENTRY * glPolygonOffset)(GLfloat factor, GLfloat units);
-    void (APIENTRY * glReadPixels)(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLvoid* pixels);
-    void (APIENTRY * glScissor)(GLint x, GLint y, GLsizei width, GLsizei height);
-    void (APIENTRY * glStencilFunc)(GLenum func, GLint ref, GLuint mask);
-    void (APIENTRY * glStencilMask)(GLuint mask);
-    void (APIENTRY * glStencilOp)(GLenum fail, GLenum zfail, GLenum zpass);
-    void (APIENTRY * glTexImage2D)(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const GLvoid* pixels);
-    void (APIENTRY * glTexParameterf)(GLenum target, GLenum pname, GLfloat param);
-    void (APIENTRY * glTexParameterfv)(GLenum target, GLenum pname, const GLfloat* params);
-    void (APIENTRY * glTexParameteri)(GLenum target, GLenum pname, GLint param);
-    void (APIENTRY * glTexParameteriv)(GLenum target, GLenum pname, const GLint* params);
-    void (APIENTRY * glTexSubImage2D)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid* pixels);
-    void (APIENTRY * glViewport)(GLint x, GLint y, GLsizei width, GLsizei height);
-
-    // GL only
-    void (APIENTRY * glClearDepth)(GLdouble depth);
-    void (APIENTRY * glDepthRange)(GLdouble zNear, GLdouble zFar);
 
-private:
     void *resolve(const char *name);
+private:
     HMODULE m_lib;
     bool m_nonOpengl32;