Developer Documentation

PostProcessorGrayPlugin.cc
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40 \*===========================================================================*/
41
42
43
44 #include <ACG/GL/acg_glew.hh>
45
46 #include "PostProcessorGrayPlugin.hh"
47
48 #include <ACG/GL/ScreenQuad.hh>
49
50 #include <OpenFlipper/BasePlugin/PluginFunctions.hh>
51
52 PostProcessorGrayscalePlugin::PostProcessorGrayscalePlugin() :
53 shader_(0)
54 {
55 }
56
57 PostProcessorGrayscalePlugin::~PostProcessorGrayscalePlugin()
58 {
59 delete shader_;
60 }
61
62
63 QString PostProcessorGrayscalePlugin::postProcessorName() {
64 return QString("Grayscale");
65 }
66
67 QString PostProcessorGrayscalePlugin::checkOpenGL() {
68 if (!ACG::openGLVersion(3, 0))
69 return QString("Insufficient OpenGL Version! OpenGL 3.0 or higher required");
70
71 return QString("");
72 }
73
74
75 void PostProcessorGrayscalePlugin::postProcess(ACG::GLState* _glstate, const std::vector<const PostProcessorInput*>& _input, const PostProcessorOutput& _output) {
76
77 // ======================================================================================================
78 // Load shader if needed
79 // ======================================================================================================
80 if (!shader_)
81 shader_ = GLSL::loadProgram("Grayscale/screenquad.glsl", "Grayscale/gray.glsl");
82
83 // ======================================================================================================
84 // Bind input texture
85 // ======================================================================================================
86
87 // glEnable(GL_TEXTURE_2D);
88 _input[0]->bindColorTex(0);
89
90 // ======================================================================================================
91 // Bind output FBO
92 // ======================================================================================================
93
94 _output.bind();
95
96 // ======================================================================================================
97 // Setup shader
98 // ======================================================================================================
99
100 shader_->use();
101 shader_->setUniform("textureSampler", 0);
102
103 ACG::Vec2f texcoordOffset(1.0f / float(_input[0]->width), 1.0f / float(_input[0]->height));
104 shader_->setUniform("texcoordOffset", texcoordOffset);
105
106 // ======================================================================================================
107 // Execute
108 // ======================================================================================================
109
110 ACG::ScreenQuad::draw(shader_);
111
112
113 shader_->disable();
114 }
115
116
117
ACG::GLState
Definition: GLState.hh:213
ACG::ScreenQuad::draw
static void draw(GLSL::Program *_prog=0)
Draw the screen quad.
Definition: ScreenQuad.cc:138
GLSL::Program::use
void use()
Enables the program object for using.
Definition: GLSLShader.cc:345
OpenMesh::VectorT
Definition: Vector11T.hh:83
PluginFunctions.hh
GLSL::loadProgram
GLSL::PtrProgram loadProgram(const char *vertexShaderFile, const char *tessControlShaderFile, const char *tessEvaluationShaderFile, const char *geometryShaderFile, const char *fragmentShaderFile, const GLSL::StringList *macros, bool verbose)
Definition: GLSLShader.cc:1076
PostProcessorDepthImagePlugin::shader_
GLSL::Program * shader_
shader
Definition: PostProcessorDepthImagePlugin.hh:83
GLSL::Program::setUniform
void setUniform(const char *_name, GLint _value)
Set int uniform to specified value.
Definition: GLSLShader.cc:385
ACG::openGLVersion
bool openGLVersion(const int _major, const int _minor, bool _verbose)
Definition: gl.cc:129
GLSL::Program::disable
void disable()
Resets to standard rendering pipeline.
Definition: GLSLShader.cc:355
PostProcessorOutput
Definition: PostProcessorInterface.hh:89