Float mosaic uniform

Co-authored-by: sigonasr2 <sigonasr2@gmail.com>

pixelGameEngine.h

@@ -4872,13 +4872,13 @@ namespace olc
 				"layout(location = 2) in vec4 aCol;\n"
 				"out vec2 oTex;\n"
 				"out vec4 oCol;\n"
-				"uniform float mosaic;\n"
+				"uniform int mosaic;\n"
 				"\n"
 				"void main(){\n"
 					"float p = 1.0 / aPos.z;\n"
 					"gl_Position = p * vec4(aPos.x, aPos.y, 0.0, 1.0);\n"
 					"oTex = p * aTex;\n"
-					"oCol = vec4(aCol.r,mosaic,0,aCol.a);\n"
+					"oCol = vec4(aCol.r,float(mosaic)/255.0,0,aCol.a);\n"
 				"}";
 			locShaderSource(m_nVS, 1, &strVS, NULL);
 			locCompileShader(m_nVS);
@@ -4963,7 +4963,7 @@ namespace olc
 			glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 			locUseProgram(m_nQuadShader);
 			GLint myUniformLocation = glGetUniformLocation(m_nQuadShader, "mosaic");
-			glUniform1f(myUniformLocation,1.0f);
+			glUniform1i(myUniformLocation,0);
 			locBindVertexArray(m_vaQuad);
 
 #if defined(OLC_PLATFORM_EMSCRIPTEN)