Hook up the vignette effect to the sample app.
authorSteinar H. Gunderson <sgunderson@bigfoot.com>
Mon, 1 Oct 2012 22:46:04 +0000 (00:46 +0200)
committerSteinar H. Gunderson <sgunderson@bigfoot.com>
Mon, 1 Oct 2012 22:46:04 +0000 (00:46 +0200)
main.cpp
widgets.cpp

index 569c67d..580989e 100644 (file)
--- a/main.cpp
+++ b/main.cpp
@@ -34,6 +34,9 @@ float gamma_theta = 0.0f, gamma_rad = 0.0f, gamma_v = 0.5f;
 float gain_theta = 0.0f, gain_rad = 0.0f, gain_v = 0.25f;
 float saturation = 1.0f;
 
+float radius = 0.3f;
+float inner_radius = 0.3f;
+
 void update_hsv(Effect *lift_gamma_gain_effect, Effect *saturation_effect)
 {
        RGBTriplet lift(0.0f, 0.0f, 0.0f);
@@ -69,6 +72,10 @@ void mouse(int x, int y)
                read_colorwheel(xf, yf - 0.4f, &gain_rad, &gain_theta, &gain_v);
        } else if (yf >= 0.6f && yf < 0.62f && xf < 0.2f) {
                saturation = (xf / 0.2f) * 4.0f;
+       } else if (yf >= 0.65f && yf < 0.67f && xf < 0.2f) {
+               radius = (xf / 0.2f);
+       } else if (yf >= 0.70f && yf < 0.72f && xf < 0.2f) {
+               inner_radius = (xf / 0.2f);
        }
 }
 
@@ -167,6 +174,7 @@ int main(int argc, char **argv)
        chain.add_input(inout_format);
        Effect *lift_gamma_gain_effect = chain.add_effect(EFFECT_LIFT_GAMMA_GAIN);
        Effect *saturation_effect = chain.add_effect(EFFECT_SATURATION);
+       Effect *vignette_effect = chain.add_effect(EFFECT_VIGNETTE);
        chain.add_output(inout_format);
        chain.finalize();
 
@@ -242,6 +250,8 @@ int main(int argc, char **argv)
                ++frame;
 
                update_hsv(lift_gamma_gain_effect, saturation_effect);
+               vignette_effect->set_float("radius", radius);
+               vignette_effect->set_float("inner_radius", inner_radius);
                chain.render_to_screen(src_img);
                
                glReadPixels(0, 0, WIDTH, HEIGHT, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, BUFFER_OFFSET(0));
@@ -250,7 +260,9 @@ int main(int argc, char **argv)
                draw_hsv_wheel(0.0f, lift_rad, lift_theta, lift_v);
                draw_hsv_wheel(0.2f, gamma_rad, gamma_theta, gamma_v);
                draw_hsv_wheel(0.4f, gain_rad, gain_theta, gain_v);
-               draw_saturation_bar(0.6f, saturation);
+               draw_saturation_bar(0.6f, saturation / 4.0f);
+               draw_saturation_bar(0.65f, radius);
+               draw_saturation_bar(0.70f, inner_radius);
 
                SDL_GL_SwapBuffers();
                check_error();
index 529212f..53b0eac 100644 (file)
@@ -102,7 +102,7 @@ void draw_saturation_bar(float y, float saturation)
        glColor3f(0.0f, 0.0f, 0.0f);
        glPointSize(5.0f);
        glBegin(GL_POINTS);
-       glVertex2f(0.2f * (saturation / 4.0f) * 9.0f / 16.0f, y + 0.01f);
+       glVertex2f(0.2f * saturation * 9.0f / 16.0f, y + 0.01f);
        glEnd();
 
        glColor3f(1.0f, 1.0f, 1.0f);