wined3d: Allow vertex shaders to generate GLSL shaders

[Jason Green]

This patch allows vertex shaders to generate GLSL shaders instead of /
in addition to ARB_vertex_program's.

Please let me know if any of these patches conflict with Ivan's recent
patches, and I can re-submit if necessary.
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diff --git a/dlls/wined3d/vertexshader.c b/dlls/wined3d/vertexshader.c
index 4321693..f38a3c9 100644
--- a/dlls/wined3d/vertexshader.c
+++ b/dlls/wined3d/vertexshader.c
@@ -5,6 +5,7 @@
  * Copyright 2002-2003 Raphael Junqueira
  * Copyright 2005 Oliver Stieber
  * Copyright 2006 Ivan Gyurdiev
+ * Copyright 2006 Jason Green
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -1063,8 +1064,31 @@ inline static VOID IWineD3DVertexShaderI
     buffer.bsize = 0;
     buffer.lineNo = 0;
 
-    /* TODO: Optionally, generate the GLSL shader instead */
-    if (GL_SUPPORT(ARB_VERTEX_PROGRAM)) {
+    if (USING_GLSL) {
+        /* Create the hw GLSL shader program */
+        GLhandleARB shader, program;
+
+        /* Create the uniforms (aka constants) */
+        shader_addline(&buffer, "uniform vec4 C[%u];\n", This->baseShader.limits.constant_float);
+        /* TODO - Add varyings, attributes, etc. */
+
+        /* Generate the bulk of the shader code */
+        generate_base_shader( (IWineD3DBaseShader*) This, &buffer, pFunction);
+
+        shader_addline(&buffer, "}\n\0");
+
+        /* Create the GLSL shader object */
+        shader = GL_EXTCALL(glCreateShaderObjectARB(GL_VERTEX_SHADER_ARB));
+        GL_EXTCALL(glShaderSourceARB(shader, 1, (const char**)&buffer.buffer, NULL));
+        GL_EXTCALL(glCompileShaderARB(shader));
+        /* Create the shader program and bind the object to it */
+        program = GL_EXTCALL(glCreateProgramObjectARB());
+        GL_EXTCALL(glAttachObjectARB(program, shader));
+        GL_EXTCALL(glLinkProgramARB(program));
+        This->baseShader.prgId = program;
+        /* We will check for errors later when we try to use the program */
+
+    } else if (GL_SUPPORT(ARB_VERTEX_PROGRAM)) {
         /*  Create the hw ARB shader */
         shader_addline(&buffer, "!!ARBvp1.0\n");