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_modelview(); 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_modelview(); 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); }