Slic3r::GUI::IMTexture Class Reference

#include </home/runner/work/OrcaSlicer/OrcaSlicer/src/slic3r/GUI/ImGuiWrapper.hpp>

Static Public Member Functions
static bool	load_from_svg_file (const std::string &filename, unsigned width, unsigned height, ImTextureID &texture_id)

Detailed Description

Member Function Documentation

load_from_svg_file()

bool Slic3r::GUI::IMTexture::load_from_svg_file ( const std::string & filename, unsigned width, unsigned height, ImTextureID & texture_id )

static

{
    NSVGimage* image = nsvgParseFromFile(filename.c_str(), "px", 96.0f);
    if (image == nullptr) {
        return false;
    }
 
    float scale = (float)width / std::max(image->width, image->height);
 
    int n_pixels = width * height;
 
    if (n_pixels <= 0) {
        nsvgDelete(image);
        return false;
    }
 
    NSVGrasterizer* rast = nsvgCreateRasterizer();
    if (rast == nullptr) {
        nsvgDelete(image);
        return false;
    }
    std::vector<unsigned char> data(n_pixels * 4, 0);
    nsvgRasterize(rast, image, 0, 0, scale, data.data(), width, height, width * 4);
 
    bool compress = false;
    GLint last_texture;
    unsigned m_image_texture{ 0 };
    unsigned char* pixels = (unsigned char*)(&data[0]);
 
    glsafe(::glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture));
    glsafe(::glGenTextures(1, &m_image_texture));
    glsafe(::glBindTexture(GL_TEXTURE_2D, m_image_texture));
    glsafe(::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
    glsafe(::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
    glsafe(::glPixelStorei(GL_UNPACK_ROW_LENGTH, 0));
    glsafe(::glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels));
 
    // Store our identifier
    texture_id = (ImTextureID)(intptr_t)m_image_texture;
 
    // Restore state
    glsafe(::glBindTexture(GL_TEXTURE_2D, last_texture));
 
    nsvgDeleteRasterizer(rast);
    nsvgDelete(image);
 
    return true;
}

References GL_LINEAR, GL_RGBA, GL_TEXTURE_2D, GL_TEXTURE_BINDING_2D, GL_TEXTURE_MAG_FILTER, GL_TEXTURE_MIN_FILTER, GL_UNPACK_ROW_LENGTH, GL_UNSIGNED_BYTE, glBindTexture, glGenTextures, glGetIntegerv, glPixelStorei, glsafe, glTexImage2D, glTexParameteri, Slic3r::nsvgParseFromFile(), and scale().

Referenced by Slic3r::GUI::GLGizmosManager::init_icon_textures(), Slic3r::GUI::IMSlider::init_texture(), and Slic3r::GUI::menu_item_with_icon().

Here is the call graph for this function:

Here is the caller graph for this function:

---

The documentation for this class was generated from the following files:

• /home/runner/work/OrcaSlicer/OrcaSlicer/src/slic3r/GUI/ImGuiWrapper.hpp
• /home/runner/work/OrcaSlicer/OrcaSlicer/src/slic3r/GUI/ImGuiWrapper.cpp