diff options
| -rw-r--r-- | markdown.cpp | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/markdown.cpp b/markdown.cpp index e8b4e71..6c94a97 100644 --- a/markdown.cpp +++ b/markdown.cpp @@ -11,6 +11,7 @@ #include <string> #include <string_view> #include <thread> +#include <unordered_map> #include <GL/glew.h> #include <GLFW/glfw3.h> @@ -20,11 +21,23 @@ #include <imgui_impl_opengl3.h> #include <imgui_md.h> +#define STB_IMAGE_IMPLEMENTATION +#include <stb_image.h> + std::string g_base_address; ImFont * g_font_regular; ImFont * g_font_bold; ImFont * g_font_bold_large; +struct Image +{ + ImTextureID m_texture_id; + int m_width; + int m_height; +}; + +std::unordered_map<std::string, Image> g_images; + static std::string get(const std::string & command) { std::string result; @@ -65,6 +78,31 @@ static std::string expand_url(const std::string & href) } } +static bool load_image(const std::string & filename, Image & image) +{ + unsigned char * data = stbi_load(filename.c_str(), &image.m_width, &image.m_height, nullptr, 4); + if (nullptr == data) + return false; + GLuint texture; + glGenTextures(1, &texture); + glBindTexture(GL_TEXTURE_2D, texture); + + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); + +#if defined(GL_UNPACK_ROW_LENGTH) + glPixelStorei(GL_UNPACK_ROW_LENGTH, 0); +#endif + + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, image.m_width, image.m_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data); + stbi_image_free(data); + image.m_texture_id = reinterpret_cast<ImTextureID>(texture); + + return true; +} + struct Markdown : public imgui_md { ImFont * get_font() const override @@ -91,6 +129,32 @@ struct Markdown : public imgui_md std::thread t(std::move(task), command); t.detach(); } + + bool get_image(image_info & nfo) const override + { + auto search = g_images.find(m_href); + if (g_images.end() == search) + { + std::string command = "phttp " + expand_url(m_href); + std::packaged_task<std::string (const std::string &)> task(get); + auto future = task.get_future(); + std::thread t(std::move(task), command); + t.detach(); + const auto result = future.get(); + auto n = result.find(" "); + n = result.find(" ", n + 1); + const auto filename = result.substr(n + 1, result.size() - n - 2); + if (!load_image(filename, g_images[m_href])) + throw std::runtime_error("could not load image"); + } + nfo.texture_id = g_images[m_href].m_texture_id; + nfo.size = {g_images[m_href].m_width, g_images[m_href].m_height}; + nfo.uv0 = {0, 0}; + nfo.uv1 = {1, 1}; + nfo.col_tint = {1, 1, 1, 1}; + nfo.col_border = {0, 0, 0, 0}; + return true; + } }; static void glfw_error_callback(int error, const char * description) |