Chnage GL_RENDERER and GL_VENDOR to show underlying hardware and driver (for #502)

Author: ptitSeb

src/gl/getter.c

@@ -239,6 +239,11 @@ void BuildExtensionsList() {
     }
 }
 
+static char renderer_string[128] = {0};
+static char vendor_string[128] = {0};
+extern char* gl4es_original_vendor;
+extern char* gl4es_original_renderer;
+
 const GLubyte* APIENTRY_GL4ES gl4es_glGetString(GLenum name) {
     DBG(printf("glGetString(%s)\n", PrintEnum(name));)
     errorShim(GL_NO_ERROR);
@@ -249,9 +254,15 @@ const GLubyte* APIENTRY_GL4ES gl4es_glGetString(GLenum name) {
             BuildExtensionsList();
             return glstate->extensions;
 		case GL_VENDOR:
-			return (GLubyte *)"ptitSeb";
+            if(!vendor_string[0]) {
+                snprintf(vendor_string, 127, "GL4ES wrapping %s", gl4es_original_vendor?gl4es_original_vendor:"an unknown hardware");
+            }
+			return (GLubyte *)vendor_string;
 		case GL_RENDERER:
-			return (GLubyte *)"GL4ES wrapper";
+            if(!renderer_string[0]) {
+                snprintf(renderer_string, 127, "GL4ES using %s", gl4es_original_renderer?gl4es_original_renderer:"an unknown renderer");
+            }
+			return (GLubyte *)renderer_string;
 		case GL_SHADING_LANGUAGE_VERSION:
             if(globals4es.gl==21)
             return (GLubyte *)"1.20 via gl4es";

src/glx/hardext.c

@@ -18,6 +18,9 @@ static int tested = 0;
 
 hardext_t hardext = {0};
 
+char* gl4es_original_vendor = NULL;
+char* gl4es_original_renderer = NULL;
+
 static int testGLSL(const char* version, int uniformLoc) {
     // check if glsl 120 shaders are supported... by compiling one !
     LOAD_GLES2(glCreateShader);
@@ -420,6 +423,9 @@ void GetHardwareExtensions(int notest)
     // get GLES driver signatures...
     const char *vendor = (const char *) gles_glGetString(GL_VENDOR);
     SHUT_LOGD("Hardware vendor is %s\n", vendor);
+    if(!gl4es_original_vendor) {
+        gl4es_original_vendor = strdup(vendor);
+    }
     if(strstr(vendor, "ARM"))
         hardext.vendor = VEND_ARM;
     else if(strstr(vendor, "Imagination Technologies"))
@@ -432,6 +438,10 @@ void GetHardwareExtensions(int notest)
         if(testGLSL("#version 310 es", 1))
             hardext.glsl310es = 1;
     }
+    if(!gl4es_original_renderer) {
+        const char* renderer = (const char *) gles_glGetString(GL_RENDERER);
+        gl4es_original_renderer = strdup(renderer);
+    }
     if(hardext.glsl120) {
         SHUT_LOGD("GLSL 120 supported and used\n");
     }