PSP rendering and shader cleanup

src/extras/shaders/obj/leedsDefault_frag.inc

@@ -0,0 +1,50 @@
+const char *leedsDefault_frag_src =
+"uniform sampler2D tex0;\n"
+"uniform sampler2D tex1;\n"
+
+"uniform float u_fxparams;\n"
+"uniform vec4 u_colorscale;\n"
+
+"#define shininess (u_fxparams)\n"
+
+"FSIN vec4 v_color;\n"
+"FSIN vec2 v_tex0;\n"
+"#if defined(PASS_BLEND) || defined(PASS_ADD)\n"
+"FSIN vec2 v_tex1;\n"
+"#endif\n"
+"FSIN float v_fog;\n"
+
+"void\n"
+"main(void)\n"
+"{\n"
+"	vec4 pass1 = v_color*texture(tex0, vec2(v_tex0.x, 1.0-v_tex0.y))*u_colorscale;\n"
+"	pass1.rgb = clamp(pass1.rgb, 0.0, 1.0);\n"
+"	pass1.rgb = mix(u_fogColor.rgb, pass1.rgb, v_fog);\n"
+
+"	vec4 color;\n"
+"#if defined(PASS_BLEND) || defined(PASS_ADD)\n"
+"	vec4 pass2 = texture(tex1, vec2(v_tex1.x, 1.0-v_tex1.y));\n"
+"	pass2.a *= shininess;\n"
+"	pass2.rgb = mix(vec3(0.0, 0.0, 0.0), pass2.rgb, v_fog);\n"
+
+"	// We simulate drawing this in two passes.\n"
+"#if defined(PASS_ADD)\n"
+"	// First pass with standard blending, second with addition\n"
+"	// We premultiply alpha so render state should be one.\n"
+"	color.rgb = pass1.rgb*pass1.a + pass2.rgb*pass2.a;\n"
+"	color.a = pass1.a;\n"
+"#elif defined(PASS_BLEND)\n"
+"	// We premultiply alpha so render state should be one.\n"
+"	color.rgb = pass1.rgb*pass1.a*(1.0-pass2.a) + pass2.rgb*pass2.a;\n"
+"	color.a = pass1.a*(1.0-pass2.a) + pass2.a;\n"
+"#endif\n"
+
+"#else\n"
+"	color = pass1;\n"
+"#endif\n"
+
+"	DoAlphaTest(color.a);\n"
+
+"	FRAGCOLOR(color);\n"
+"}\n"
+;