void App::render_gaussian_blur(clan::Canvas &canvas, float blur_amount, clan::Texture2D &source_texture, clan::ProgramObject &program_object, float dx, float dy)
{
uniforms.sample[0].weight = compute_gaussian(0, blur_amount);
uniforms.sample[0].offset_x = 0.0f;
uniforms.sample[0].offset_y = 0.0f;
float totalWeights = uniforms.sample[0].weight;
for (int i = 0; i < sampleCount / 2; i++)
{
float weight = compute_gaussian(i + 1.0f, blur_amount);
uniforms.sample[i * 2 + 1].weight = weight;
uniforms.sample[i * 2 + 2].weight = weight;
totalWeights += weight * 2;
float sampleOffset = i * 2 + 1.5f;
clan::Vec2f delta(dx * sampleOffset, dy * sampleOffset);
uniforms.sample[i * 2 + 1].offset_x = delta.x;
uniforms.sample[i * 2 + 1].offset_y = delta.y;
uniforms.sample[i * 2 + 2].offset_x = -delta.x;
uniforms.sample[i * 2 + 2].offset_y = -delta.y;
}
for (int i = 0; i < sampleCount; i++)
{
uniforms.sample[i].weight /= totalWeights;
}
canvas.flush();
clan::GraphicContext gc = canvas.get_gc();
gc.set_texture(0, source_texture);
gc.set_program_object(program_object);
uniforms.cl_ModelViewProjectionMatrix = canvas.get_projection() * canvas.get_transform();
gpu_uniforms.upload_data(gc, &uniforms, 1);
gc.set_uniform_buffer(0, gpu_uniforms);
draw_texture(gc, clan::Rectf(0,0,canvas.get_width(),canvas.get_height()), clan::Rectf(0.0f, 0.0f, 1.0f, 1.0f));
gc.reset_program_object();
gc.reset_texture(0);
}
void App::render_shockwave(clan::Canvas &canvas, clan::Texture2D &source_texture, clan::ProgramObject &program_object)
{
canvas.flush();
clan::GraphicContext gc = canvas.get_gc();
gc.set_texture(0, source_texture);
gc.set_program_object(program_object);
uniforms.cl_ModelViewProjectionMatrix = canvas.get_projection() * canvas.get_transform();
gpu_uniforms.upload_data(gc, &uniforms, 1);
gc.set_uniform_buffer(0, gpu_uniforms);
draw_texture(gc, clan::Rectf(0,0,canvas.get_width(),canvas.get_height()), clan::Rectf(0.0f, 0.0f, 1.0f, 1.0f));
gc.reset_program_object();
gc.reset_texture(0);
}
SvgTransformScope::SvgTransformScope(clan::Canvas &canvas, clan::DomElement &e) : canvas(canvas)
{
try
{
clan::Mat4d mat = clan::Mat4d::identity();
SvgAttributeReader transform(e, "transform");
while (!transform.is_end())
{
clan::Mat4d t;
if (transform.is_keyword("matrix"))
{
transform.get_keyword("matrix");
transform.get_operator("(");
t = clan::Mat4d::identity();
t.matrix[0] = transform.get_number();
t.matrix[1] = transform.get_number();
t.matrix[4] = transform.get_number();
t.matrix[5] = transform.get_number();
t.matrix[12] = transform.get_number();
t.matrix[13] = transform.get_number();
transform.get_operator(")");
}
else if (transform.is_keyword("translate"))
{
transform.get_keyword("translate");
transform.get_operator("(");
double tx = transform.get_number();
double ty = transform.is_number() ? transform.get_number() : 0.0;
transform.get_operator(")");
t = clan::Mat4d::translate(tx, ty, 0.0);
}
else if (transform.is_keyword("scale"))
{
transform.get_keyword("scale");
transform.get_operator("(");
double sx = transform.get_number();
double sy = transform.is_number() ? transform.get_number() : sx;
transform.get_operator(")");
t = clan::Mat4d::scale(sx, sy, 0.0);
}
else if (transform.is_keyword("rotate"))
{
transform.get_keyword("rotate");
transform.get_operator("(");
double a = transform.get_number() * clan::PI / 180.0;
t = clan::Mat4d::identity();
t.matrix[0] = std::cos(a);
t.matrix[1] = std::sin(a);
t.matrix[4] = -t.matrix[1];
t.matrix[5] = -t.matrix[0];
if (transform.is_number())
{
double tx = transform.get_number();
double ty = transform.is_number() ? transform.get_number() : 0.0;
t = clan::Mat4d::translate(tx, ty, 0.0) * t * clan::Mat4d::translate(-tx, -ty, 0.0);
}
transform.get_operator(")");
}
else if (transform.is_keyword("skewX"))
{
transform.get_keyword("skewX");
transform.get_operator("(");
double a = transform.get_number() * clan::PI / 180.0;
transform.get_operator(")");
t = clan::Mat4d::identity();
t.matrix[4] = std::tan(a);
}
else if (transform.is_keyword("skewY"))
{
transform.get_keyword("skewY");
transform.get_operator("(");
double a = transform.get_number() * clan::PI / 180.0;
transform.get_operator(")");
t = clan::Mat4d::identity();
t.matrix[1] = std::tan(a);
}
else
{
transform.parse_error("expected transform keyword");
}
mat = mat * t;
if (transform.is_operator(","))
transform.get_operator(",");
}
old_transform = canvas.get_transform();
canvas.mult_transform(clan::Mat4f(mat));
transform_active = true;
}
catch (clan::Exception &)
{
}
}
SvgTransformScope::SvgTransformScope(clan::Canvas &canvas, const clan::Mat4f &transform, bool transform_active) : canvas(canvas), transform_active(transform_active)
{
old_transform = canvas.get_transform();
canvas.mult_transform(transform);
}
SvgTransformScope::SvgTransformScope(clan::Canvas &canvas, clan::DomElement &e) : canvas(canvas)
{
old_transform = canvas.get_transform();
canvas.mult_transform(parse_transform(e, transform_active));
}
void App::render_bloom_combine(clan::Canvas &canvas, clan::Texture2D &tex_base, clan::Texture2D &tex_bloom, clan::ProgramObject &program_object)
{
canvas.flush();
clan::GraphicContext gc = canvas.get_gc();
gc.set_texture(0, tex_base);
gc.set_texture(1, tex_bloom);
gc.set_program_object(program_object);
program_object.set_uniform1i(("BaseTexture"), 0);
program_object.set_uniform1f(("BaseIntensity"), base_intensity);
program_object.set_uniform1f(("BaseSaturation"), base_saturation);
program_object.set_uniform1i(("BloomTexture"), 1);
program_object.set_uniform1f(("BloomIntensity"), bloom_intensity);
program_object.set_uniform1f(("BloomSaturation"), bloom_saturation);
program_object.set_uniform_matrix("cl_ModelViewProjectionMatrix", canvas.get_projection() * canvas.get_transform());
draw_texture(gc, clan::Rectf(0,0,canvas.get_width(),canvas.get_height()), clan::Rectf(0.0f, 0.0f, 1.0f, 1.0f));
gc.reset_program_object();
gc.reset_texture(0);
gc.reset_texture(1);
}
void App::render_extract_highlights(clan::Canvas &canvas, clan::Texture2D &source_texture, clan::ProgramObject &program_object)
{
canvas.flush();
clan::GraphicContext gc = canvas.get_gc();
gc.set_texture(0, source_texture);
gc.set_program_object(program_object);
program_object.set_uniform1i(("SourceTexture"), 0);
program_object.set_uniform1f(("Threshold"), highlight_threshold);
program_object.set_uniform_matrix("cl_ModelViewProjectionMatrix", canvas.get_projection() * canvas.get_transform());
draw_texture(gc, clan::Rectf(0,0,canvas.get_width(),canvas.get_height()), clan::Rectf(0.0f, 0.0f, 1.0f, 1.0f));
gc.reset_program_object();
gc.reset_texture(0);
}