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made a REAL gaussian blur filter

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This commit is contained in:
itsmattkc
2018-08-30 23:57:37 +10:00
parent 213e989271
commit bf76550dca
15 changed files with 167 additions and 98 deletions
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effects/video/gaussianblureffect.cpp
+22 -86
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@@ -8,108 +8,44 @@ GaussianBlurEffect::GaussianBlurEffect(Clip *c) : Effect(c, EFFECT_TYPE_VIDEO, V
enable_opengl = true;
enable_image = false;
amount_val = add_row("Amount:")->add_field(EFFECT_FIELD_DOUBLE);
kernelsz_val = add_row("Kernel Size:")->add_field(EFFECT_FIELD_DOUBLE);
sigma_val = add_row("Sigma:")->add_field(EFFECT_FIELD_DOUBLE);
horiz_val = add_row("Horizontal:")->add_field(EFFECT_FIELD_BOOL);
vert_val = add_row("Vertical:")->add_field(EFFECT_FIELD_BOOL);
amount_val->set_double_minimum_value(0);
amount_val->set_double_default_value(20);
kernelsz_val->set_double_minimum_value(0);
sigma_val->set_double_minimum_value(0);
kernelsz_val->set_double_default_value(9);
sigma_val->set_double_default_value(5.5);
horiz_val->set_bool_value(true);
vert_val->set_bool_value(true);
vert.compileSourceCode("void main() {\ngl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n}");
// vert.compileSourceCode("#version 330 core\nin vec2 VertexPosition;\nvoid main(void) {\ngl_Position = vec4(VertexPosition, 0.0, 1.0);\n}");
// frag.compileSourceCode("#version 330 core\n\nuniform sampler2D image;\n\nout vec4 FragmentColor;\n\nuniform float offset[3] = float[]( 0.0, 1.3846153846, 3.2307692308 );\nuniform float weight[3] = float[]( 0.2270270270, 0.3162162162, 0.0702702703 );\n\nvoid main(void)\n{\n FragmentColor = texture2D( image, vec2(gl_FragCoord)/vec2(640.0, 360.0) ) * weight[0];\n for (int i=1; i<3; i++) {\n FragmentColor += texture2D( image, ( vec2(gl_FragCoord)+vec2(offset[i], 0.0) )/vec2(640.0, 360.0) ) * weight[i];\n FragmentColor += texture2D( image, ( vec2(gl_FragCoord)-vec2(offset[i], 0.0) )/vec2(640.0, 360.0) ) * weight[i];\n }\n}");
frag.compileSourceCode("#version 330 core\n\nuniform sampler2D image;\n\nout vec4 FragmentColor;\n\nuniform float offset[3] = float[]( 0.0, 1.3846153846, 3.2307692308 );\nuniform float weight[3] = float[]( 0.2270270270, 0.3162162162, 0.0702702703 );\nuniform float halfweight[3] = float[]( 0.1135135135, 0.1581081081, 0.03513513515 );\n\nuniform vec2 resolution;\nuniform bool horiz_blur;\nuniform bool vert_blur;\n\nvoid main(void) {\n FragmentColor = texture2D( image, vec2(gl_FragCoord)/resolution ) * weight[0];\n for (int i=1; i<3; i++) {\n float weight = (horiz_blur && vert_blur) ? halfweight[i] : weight[i];\n\n if (horiz_blur) {\n FragmentColor += texture2D( image, ( vec2(gl_FragCoord)+vec2(offset[i], 0.0) )/resolution ) * weight;\n FragmentColor += texture2D( image, ( vec2(gl_FragCoord)-vec2(offset[i], 0.0) )/resolution ) * weight;\n }\n \n if (vert_blur) {\n FragmentColor += texture2D( image, ( vec2(gl_FragCoord)+vec2(0.0, offset[i]) )/resolution ) * weight;\n FragmentColor += texture2D( image, ( vec2(gl_FragCoord)-vec2(0.0, offset[i]) )/resolution ) * weight;\n } \n }\n}");
vert.compileSourceFile(":/shaders/common.vert");
frag.compileSourceFile(":/shaders/gaussianblureffect.frag");
program.addShader(&vert);
program.addShader(&frag);
program.link();
program.link();
connect(amount_val, SIGNAL(changed()), this, SLOT(field_changed()));
connect(kernelsz_val, SIGNAL(changed()), this, SLOT(field_changed()));
connect(sigma_val, SIGNAL(changed()), this, SLOT(field_changed()));
connect(horiz_val, SIGNAL(changed()), this, SLOT(field_changed()));
connect(vert_val, SIGNAL(changed()), this, SLOT(field_changed()));
refresh();
}
void GaussianBlurEffect::process_image(double timecode, uint8_t *data, int width, int height) {
QImage result(data, width, height, QImage::Format_RGBA8888); // create QImage wrapper
int radius = 5;
int tab[] = { 14, 10, 8, 6, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2 };
int alpha = (radius < 1) ? 16 : (radius > 17) ? 1 : tab[radius-1];
int r1 = result.rect().top();
int r2 = result.rect().bottom();
int c1 = result.rect().left();
int c2 = result.rect().right();
int bpl = result.bytesPerLine();
int rgba[4];
unsigned char* p;
int i1 = 0;
int i2 = 3;
for (int col = c1; col <= c2; col++) {
p = result.scanLine(r1) + col * 4;
for (int i = i1; i <= i2; i++)
rgba[i] = p[i] << 4;
p += bpl;
for (int j = r1; j < r2; j++, p += bpl)
for (int i = i1; i <= i2; i++)
p[i] = (rgba[i] += ((p[i] << 4) - rgba[i]) * alpha / 16) >> 4;
}
for (int row = r1; row <= r2; row++) {
p = result.scanLine(row) + c1 * 4;
for (int i = i1; i <= i2; i++)
rgba[i] = p[i] << 4;
p += 4;
for (int j = c1; j < c2; j++, p += 4)
for (int i = i1; i <= i2; i++)
p[i] = (rgba[i] += ((p[i] << 4) - rgba[i]) * alpha / 16) >> 4;
}
for (int col = c1; col <= c2; col++) {
p = result.scanLine(r2) + col * 4;
for (int i = i1; i <= i2; i++)
rgba[i] = p[i] << 4;
p -= bpl;
for (int j = r1; j < r2; j++, p -= bpl)
for (int i = i1; i <= i2; i++)
p[i] = (rgba[i] += ((p[i] << 4) - rgba[i]) * alpha / 16) >> 4;
}
for (int row = r1; row <= r2; row++) {
p = result.scanLine(row) + c2 * 4;
for (int i = i1; i <= i2; i++)
rgba[i] = p[i] << 4;
p -= 4;
for (int j = c1; j < c2; j++, p -= 4)
for (int i = i1; i <= i2; i++)
p[i] = (rgba[i] += ((p[i] << 4) - rgba[i]) * alpha / 16) >> 4;
}
}
void GaussianBlurEffect::process_gl(double timecode, GLTextureCoords &coords) {
bound = false;
bool horiz = horiz_val->get_bool_value(timecode);
bool vert = vert_val->get_bool_value(timecode);
int iterationCount = amount_val->get_double_value(timecode);
if (iterationCount > 0 && (horiz || vert)) {
bound = program.bind();
setIterations(iterationCount);
program.setUniformValue("resolution", parent_clip->getWidth(), parent_clip->getHeight());
program.setUniformValue("horiz_blur", horiz);
program.setUniformValue("vert_blur", vert);
}
program.bind();
program.setUniformValue("resolution", parent_clip->getWidth(), parent_clip->getHeight());
program.setUniformValue("kernel_size", (GLfloat) kernelsz_val->get_double_value(timecode));
program.setUniformValue("sigma", (GLfloat) sigma_val->get_double_value(timecode));
program.setUniformValue("horiz_blur", horiz_val->get_bool_value(timecode));
program.setUniformValue("vert_blur", vert_val->get_bool_value(timecode));
}
void GaussianBlurEffect::clean_gl() {
if (bound) program.release();
void GaussianBlurEffect::clean_gl() {
program.release();
}