Fix some minor errors in the ambient occlusion shaders

[libs/gl.git] / source / ambientocclusion.cpp

diff --git a/source/ambientocclusion.cpp b/source/ambientocclusion.cpp
index 278720cec48fac4903661f4f52010fa99a3b19b1..cf530dc3ce389fcd6650fd60f82966df055ef354 100644 (file)
--- a/source/ambientocclusion.cpp
+++ b/source/ambientocclusion.cpp
@@ -25,9 +25,9 @@ const char occlude_fs[] =
        "                       vec2 offs = transform*vec2(float(i)-1.5, float(j)-1.5);\n"
        "                       float dxy = length(offs)*-sample;\n"
        "                       float dz = depth_ratio.x/(texture2D(depth, texcoord+offs).r-depth_ratio.y)-sample;\n"
-       "                       if(abs(dz)<3*dxy)\n"
+       "                       if(abs(dz)<3.0*dxy)\n"
        "                               sum += atan(dz/dxy)/1.570796;\n"
-       "                       else if(dz<0)\n"
+       "                       else if(dz<0.0)\n"
        "                               sum -= 0.8;\n"
        "               }\n"
        "       gl_FragColor = vec4(min(1.0-sum*darkness/16.0, 1.0), 0.0, 0.0, 1.0);\n"
@@ -51,7 +51,7 @@ const char combine_fs[] =
        "                       vec2 offs = vec2(float(i)-1.5, float(j)-1.5)/screen_size;\n"
        "                       float dxy = length(offs)*-sample;\n"
        "                       float dz = depth_ratio.x/(texture2D(depth, texcoord+offs).r-depth_ratio.y)-sample;\n"
-       "                       if(abs(dz)<3*dxy)\n"
+       "                       if(abs(dz)<3.0*dxy)\n"
        "                       {\n"
        "                               sum += texture2D(occlusion, texcoord+offs).r;\n"
        "                               count += 1.0;\n"
@@ -70,16 +70,20 @@ AmbientOcclusion::AmbientOcclusion(unsigned w, unsigned h, float depth_ratio):
 {
        occlude_shader.attach_shader(get_fullscreen_vertex_shader());
        occlude_shader.attach_shader_owned(new FragmentShader(occlude_fs));
+       occlude_shader.bind_attribute(get_component_type(VERTEX2), "vertex");
        occlude_shader.link();
 
        combine_shader.attach_shader(get_fullscreen_vertex_shader());
        combine_shader.attach_shader_owned(new FragmentShader(combine_fs));
+       combine_shader.bind_attribute(get_component_type(VERTEX2), "vertex");
        combine_shader.link();
 
        occlusion.storage(RGB, w, h);
        occlusion.set_min_filter(NEAREST);
        occlusion.set_mag_filter(NEAREST);
+       occlusion.set_wrap(CLAMP_TO_EDGE);
        fbo.attach(COLOR_ATTACHMENT0, occlusion, 0);
+       fbo.require_complete();
 
        combine_texturing.attach(2, occlusion);
 
@@ -133,11 +137,12 @@ void AmbientOcclusion::render(const Texture2D &color, const Texture2D &depth)
        combine_texturing.attach(0, depth);
        combine_texturing.attach(1, color);
 
-       Bind unbind_dtest(static_cast<DepthTest *>(0), true);
-       Bind unbind_blend(static_cast<Blend *>(0), true);
+       BindRestore unbind_dtest(static_cast<DepthTest *>(0));
+       BindRestore unbind_blend(static_cast<Blend *>(0));
+       Bind bind_mesh(quad);
 
        {
-               Bind bind_fbo(fbo, true);
+               BindRestore bind_fbo(fbo);
                Bind bind_tex(occlude_texturing);
                Bind bind_shader(occlude_shader);
                occlude_shdata.apply();