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@@ -89,12 +89,14 @@ enum PostProcessingEffect
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Mosaic = 6,
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90
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Separable_blur = 7,
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91
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Bloom = 8,
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92
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+
HueShift = 9
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92
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};
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int currentEffect = PostProcessingEffect::None;
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int filterSize = 1;
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int filterSizes[12] = { 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25 };
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99
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+
float hueShift = 0;
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///////////////////////////////////////////////////////////////////////////////
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// Framebuffers
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@@ -472,6 +474,7 @@ void display()
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labhelper::setUniformSlow(postFxShader, "currentEffect", currentEffect);
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labhelper::setUniformSlow(postFxShader, "filterSize", filterSizes[filterSize - 1]);
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474
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477
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+
labhelper::setUniformSlow(postFxShader, "hue_shift", hueShift);
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_2D, cameraFB.colorTextureTarget);
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@@ -608,6 +611,9 @@ void gui()
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ImGui::RadioButton("Mosaic", ¤tEffect, PostProcessingEffect::Mosaic);
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ImGui::RadioButton("Separable Blur", ¤tEffect, PostProcessingEffect::Separable_blur);
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ImGui::RadioButton("Bloom", ¤tEffect, PostProcessingEffect::Bloom);
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614
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+
ImGui::RadioButton("Hue Shift", ¤tEffect, PostProcessingEffect::HueShift);
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615
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ImGui::SameLine();
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616
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+
ImGui::SliderFloat("Amount##Hue Shift", &hueShift, 0, 1);
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611
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ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate,
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ImGui::GetIO().Framerate);
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// ----------------------------------------------------------
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@@ -53,6 +53,49 @@ vec2 mosaic(vec2 inCoord)
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return inCoord - mod(inCoord, 22.0);
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}
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56
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+
uniform float hue_shift = 0.0;
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57
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+
vec3 rgb2hsv(vec3 c)
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58
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{
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float V = max(max(c.r, c.g), c.b);
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60
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+
float C = V - min(min(c.r, c.g), c.b);
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61
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float S = 0;
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62
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if ( V > 0 )
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63
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{
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S = C / V;
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65
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}
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66
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+
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float H = 0;
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68
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if (C != 0)
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{
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if (c.r == V) H = ((c.g - c.b)/C) / 6.0;
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71
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else if (c.g == V) H = (2 + (c.b - c.r)/C) / 6.0;
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72
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else H = (4 + (c.r - c.g)/C) / 6.0;
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73
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H = fract(H);
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74
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}
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75
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return vec3(H, S, V);
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}
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+
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78
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+
vec3 hsv2rgb(vec3 c)
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79
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{
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float C = c.y * c.z;
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81
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float X = C * (1 - abs(mod(c.x * 6, 2.0) - 1));
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82
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float m = c.z - C;
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83
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if (c.x < 1/6.0) c = vec3(C, X, 0);
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84
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else if (c.x < 2/6.0) c = vec3(X, C, 0);
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else if (c.x < 3/6.0) c = vec3(0, C, X);
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86
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else if (c.x < 4/6.0) c = vec3(0, X, C);
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87
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else if (c.x < 5/6.0) c = vec3(X, 0, C);
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88
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else c = vec3(C, 0, X);
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89
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90
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return c + m;
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91
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}
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92
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+
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vec3 colorShift(vec3 c)
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94
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{
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c = rgb2hsv(c);
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c.x = fract(c.x + hue_shift);
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return hsv2rgb(c);
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}
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void main()
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{
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@@ -88,7 +131,7 @@ void main()
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+ textureRect(blurredFrameBufferTexture, gl_FragCoord.xy);
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break;
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90
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case 9:
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91
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-
fragmentColor = vec4(
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+
fragmentColor = vec4(colorShift(textureRect(frameBufferTexture, gl_FragCoord.xy).rgb), 1);
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break;
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}
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}
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