aboutsummaryrefslogtreecommitdiff
path: root/subprojects/nk_pugl/nuklear/demo/sfml_opengl2/nuklear_sfml_gl2.h
diff options
context:
space:
mode:
Diffstat (limited to 'subprojects/nk_pugl/nuklear/demo/sfml_opengl2/nuklear_sfml_gl2.h')
-rw-r--r--subprojects/nk_pugl/nuklear/demo/sfml_opengl2/nuklear_sfml_gl2.h359
1 files changed, 359 insertions, 0 deletions
diff --git a/subprojects/nk_pugl/nuklear/demo/sfml_opengl2/nuklear_sfml_gl2.h b/subprojects/nk_pugl/nuklear/demo/sfml_opengl2/nuklear_sfml_gl2.h
new file mode 100644
index 0000000..9649ec0
--- /dev/null
+++ b/subprojects/nk_pugl/nuklear/demo/sfml_opengl2/nuklear_sfml_gl2.h
@@ -0,0 +1,359 @@
+/*
+ * Nuklear - 1.32.0 - public domain
+ * no warrenty implied; use at your own risk.
+ * authored from 2015-2016 by Micha Mettke
+ */
+/*
+ * ==============================================================
+ *
+ * API
+ *
+ * ===============================================================
+ */
+#ifndef NK_SFML_GL2_H_
+#define NK_SFML_GL2_H_
+
+#include <SFML/Window.hpp>
+
+NK_API struct nk_context* nk_sfml_init(sf::Window* window);
+NK_API void nk_sfml_font_stash_begin(struct nk_font_atlas** atlas);
+NK_API void nk_sfml_font_stash_end(void);
+NK_API int nk_sfml_handle_event(sf::Event* event);
+NK_API void nk_sfml_render(enum nk_anti_aliasing);
+NK_API void nk_sfml_shutdown(void);
+
+#endif
+/*
+ * ==============================================================
+ *
+ * IMPLEMENTATION
+ *
+ * ===============================================================
+ */
+ #ifdef NK_SFML_GL2_IMPLEMENTATION
+
+struct nk_sfml_device {
+ struct nk_buffer cmds;
+ struct nk_draw_null_texture null;
+ GLuint font_tex;
+};
+
+struct nk_sfml_vertex {
+ float position[2];
+ float uv[2];
+ nk_byte col[4];
+};
+
+static struct nk_sfml {
+ sf::Window* window;
+ struct nk_sfml_device ogl;
+ struct nk_context ctx;
+ struct nk_font_atlas atlas;
+} sfml;
+
+NK_INTERN void
+nk_sfml_device_upload_atlas(const void* image, int width, int height)
+{
+ struct nk_sfml_device* dev = &sfml.ogl;
+ glGenTextures(1, &dev->font_tex);
+ glBindTexture(GL_TEXTURE_2D, dev->font_tex);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, (GLsizei)width, (GLsizei)height, 0,
+ GL_RGBA, GL_UNSIGNED_BYTE, image);
+}
+
+NK_API void
+nk_sfml_render(enum nk_anti_aliasing AA)
+{
+ /* setup global state */
+ struct nk_sfml_device* dev = &sfml.ogl;
+
+ int window_width = sfml.window->getSize().x;
+ int window_height = sfml.window->getSize().y;
+
+ glPushAttrib(GL_ENABLE_BIT | GL_COLOR_BUFFER_BIT | GL_TRANSFORM_BIT);
+ glDisable(GL_CULL_FACE);
+ glDisable(GL_DEPTH_TEST);
+ glEnable(GL_SCISSOR_TEST);
+ glEnable(GL_BLEND);
+ glEnable(GL_TEXTURE_2D);
+ glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+ glViewport(0, 0, (GLsizei)window_width, (GLsizei)window_height);
+ glMatrixMode(GL_TEXTURE);
+ glPushMatrix();
+ glLoadIdentity();
+ glMatrixMode(GL_PROJECTION);
+ glPushMatrix();
+ glLoadIdentity();
+ glOrtho(0.0f, window_width, window_height, 0.0f, -1.0f, 1.0f);
+ glMatrixMode(GL_MODELVIEW);
+ glPushMatrix();
+ glLoadIdentity();
+
+ glEnableClientState(GL_VERTEX_ARRAY);
+ glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+ glEnableClientState(GL_COLOR_ARRAY);
+ {
+ GLsizei vs = sizeof(struct nk_sfml_vertex);
+ size_t vp = offsetof(struct nk_sfml_vertex, position);
+ size_t vt = offsetof(struct nk_sfml_vertex, uv);
+ size_t vc = offsetof(struct nk_sfml_vertex, col);
+
+ /* convert from command queue into draw list and draw to screen */
+ const struct nk_draw_command* cmd;
+ const nk_draw_index* offset = NULL;
+ struct nk_buffer vbuf, ebuf;
+
+ /* fill converting configuration */
+ struct nk_convert_config config;
+ static const struct nk_draw_vertex_layout_element vertex_layout[] = {
+ {NK_VERTEX_POSITION, NK_FORMAT_FLOAT, NK_OFFSETOF(struct nk_sfml_vertex, position)},
+ {NK_VERTEX_TEXCOORD, NK_FORMAT_FLOAT, NK_OFFSETOF(struct nk_sfml_vertex, uv)},
+ {NK_VERTEX_COLOR, NK_FORMAT_R8G8B8A8, NK_OFFSETOF(struct nk_sfml_vertex, col)},
+ {NK_VERTEX_LAYOUT_END}
+ };
+ NK_MEMSET(&config, 0, sizeof(config));
+ config.vertex_layout = vertex_layout;
+ config.vertex_size = sizeof(struct nk_sfml_vertex);
+ config.vertex_alignment = NK_ALIGNOF(struct nk_sfml_vertex);
+ config.null = dev->null;
+ config.circle_segment_count = 22;
+ config.curve_segment_count = 22;
+ config.arc_segment_count = 22;
+ config.global_alpha = 1.0f;
+ config.shape_AA = AA;
+ config.line_AA = AA;
+
+ /* convert shapes into vertices */
+ nk_buffer_init_default(&vbuf);
+ nk_buffer_init_default(&ebuf);
+ nk_convert(&sfml.ctx, &dev->cmds, &vbuf, &ebuf, &config);
+
+ /* setup vertex buffer pointer */
+ const void* vertices = nk_buffer_memory_const(&vbuf);
+ glVertexPointer(2, GL_FLOAT, vs, (const void*)((const nk_byte*)vertices + vp));
+ glTexCoordPointer(2, GL_FLOAT, vs, (const void*)((const nk_byte*)vertices + vt));
+ glColorPointer(4, GL_UNSIGNED_BYTE, vs, (const void*)((const nk_byte*)vertices + vc));
+
+ /* iterate over and execute each draw command */
+ offset = (const nk_draw_index*)nk_buffer_memory_const(&ebuf);
+ nk_draw_foreach(cmd, &sfml.ctx, &dev->cmds)
+ {
+ if(!cmd->elem_count) continue;
+ glBindTexture(GL_TEXTURE_2D, (GLuint)cmd->texture.id);
+ glScissor(
+ (GLint)(cmd->clip_rect.x),
+ (GLint)((window_height - (GLint)(cmd->clip_rect.y + cmd->clip_rect.h))),
+ (GLint)(cmd->clip_rect.w),
+ (GLint)(cmd->clip_rect.h));
+ glDrawElements(GL_TRIANGLES, (GLsizei)cmd->elem_count, GL_UNSIGNED_SHORT, offset);
+ offset += cmd->elem_count;
+ }
+ nk_clear(&sfml.ctx);
+ nk_buffer_free(&vbuf);
+ nk_buffer_free(&ebuf);
+ }
+
+ /* default OpenGL state */
+ glDisableClientState(GL_VERTEX_ARRAY);
+ glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+ glDisableClientState(GL_COLOR_ARRAY);
+
+ glDisable(GL_CULL_FACE);
+ glDisable(GL_DEPTH_TEST);
+ glDisable(GL_SCISSOR_TEST);
+ glDisable(GL_BLEND);
+ glDisable(GL_TEXTURE_2D);
+
+ glBindTexture(GL_TEXTURE_2D, 0);
+ glMatrixMode(GL_TEXTURE);
+ glPopMatrix();
+ glMatrixMode(GL_MODELVIEW);
+ glPopMatrix();
+ glMatrixMode(GL_PROJECTION);
+ glPopMatrix();
+ glPopAttrib();
+}
+
+static void
+nk_sfml_clipboard_paste(nk_handle usr, struct nk_text_edit* edit)
+{
+#if 0
+ /* Not Implemented in SFML */
+ sf::Clipboard clipboard(sfml.window);
+ const char* text = clipboard.getText();
+
+ if(text)
+ nk_textedit_paste(edit, text, nk_strlen(text));
+ (void)usr;
+#endif
+}
+
+static void
+nk_sfml_clipboard_copy(nk_handle usr, const char* text, int len)
+{
+#if 0
+ char* str = 0;
+ (void)usr;
+ if(!len) return;
+ str = (char*)malloc((size_t)len+1);
+ if(!str) return;
+ memcpy(str, text, (size_t)len);
+ str[len] = '\0';
+
+ /* Not Implemented in SFML */
+ sf::Clipboard clipboard(sfml.window);
+ clipboard.setText(str);
+ free(str);
+#endif
+}
+
+NK_API struct nk_context*
+nk_sfml_init(sf::Window* window)
+{
+ sfml.window = window;
+ nk_init_default(&sfml.ctx, 0);
+ sfml.ctx.clip.copy = nk_sfml_clipboard_copy;
+ sfml.ctx.clip.paste = nk_sfml_clipboard_paste;
+ sfml.ctx.clip.userdata = nk_handle_ptr(0);
+ nk_buffer_init_default(&sfml.ogl.cmds);
+ return &sfml.ctx;
+}
+
+NK_API void
+nk_sfml_font_stash_begin(struct nk_font_atlas** atlas)
+{
+ nk_font_atlas_init_default(&sfml.atlas);
+ nk_font_atlas_begin(&sfml.atlas);
+ *atlas = &sfml.atlas;
+}
+
+NK_API void
+nk_sfml_font_stash_end()
+{
+ int w, h;
+ const void* img;
+ img = nk_font_atlas_bake(&sfml.atlas, &w, &h, NK_FONT_ATLAS_RGBA32);
+ nk_sfml_device_upload_atlas(img, w, h);
+ nk_font_atlas_end(&sfml.atlas, nk_handle_id((int)sfml.ogl.font_tex), &sfml.ogl.null);
+ if(sfml.atlas.default_font)
+ nk_style_set_font(&sfml.ctx, &sfml.atlas.default_font->handle);
+}
+
+NK_API int
+nk_sfml_handle_event(sf::Event* evt)
+{
+ struct nk_context* ctx = &sfml.ctx;
+ /* optional grabbing behavior */
+ if(ctx->input.mouse.grab)
+ ctx->input.mouse.grab = 0;
+ else if(ctx->input.mouse.ungrab) {
+ int x = (int)ctx->input.mouse.prev.x;
+ int y = (int)ctx->input.mouse.prev.y;
+ sf::Mouse::setPosition(sf::Vector2i(x, y), *sfml.window);
+ ctx->input.mouse.ungrab = 0;
+ }
+ if(evt->type == sf::Event::KeyReleased || evt->type == sf::Event::KeyPressed)
+ {
+ int down = evt->type == sf::Event::KeyPressed;
+ sf::Keyboard::Key key = evt->key.code;
+ if(key == sf::Keyboard::RShift || key == sf::Keyboard::LShift)
+ nk_input_key(ctx, NK_KEY_SHIFT, down);
+ else if(key == sf::Keyboard::Delete)
+ nk_input_key(ctx, NK_KEY_DEL, down);
+ else if(key == sf::Keyboard::Return)
+ nk_input_key(ctx, NK_KEY_ENTER, down);
+ else if(key == sf::Keyboard::Tab)
+ nk_input_key(ctx, NK_KEY_TAB, down);
+ else if(key == sf::Keyboard::BackSpace)
+ nk_input_key(ctx, NK_KEY_BACKSPACE, down);
+ else if(key == sf::Keyboard::Home) {
+ nk_input_key(ctx, NK_KEY_TEXT_START, down);
+ nk_input_key(ctx, NK_KEY_SCROLL_START, down);
+ } else if(key == sf::Keyboard::End) {
+ nk_input_key(ctx, NK_KEY_TEXT_END, down);
+ nk_input_key(ctx, NK_KEY_SCROLL_END, down);
+ } else if(key == sf::Keyboard::PageDown)
+ nk_input_key(ctx, NK_KEY_SCROLL_DOWN, down);
+ else if(key == sf::Keyboard::PageUp)
+ nk_input_key(ctx, NK_KEY_SCROLL_DOWN, down);
+ else if(key == sf::Keyboard::Z)
+ nk_input_key(ctx, NK_KEY_TEXT_UNDO, down && sf::Keyboard::isKeyPressed(sf::Keyboard::LControl));
+ else if(key == sf::Keyboard::R)
+ nk_input_key(ctx, NK_KEY_TEXT_REDO, down && sf::Keyboard::isKeyPressed(sf::Keyboard::LControl));
+ else if(key == sf::Keyboard::C)
+ nk_input_key(ctx, NK_KEY_COPY, down && sf::Keyboard::isKeyPressed(sf::Keyboard::LControl));
+ else if(key == sf::Keyboard::V)
+ nk_input_key(ctx, NK_KEY_PASTE, down && sf::Keyboard::isKeyPressed(sf::Keyboard::LControl));
+ else if(key == sf::Keyboard::X)
+ nk_input_key(ctx, NK_KEY_CUT, down && sf::Keyboard::isKeyPressed(sf::Keyboard::LControl));
+ else if(key == sf::Keyboard::B)
+ nk_input_key(ctx, NK_KEY_TEXT_LINE_START, down && sf::Keyboard::isKeyPressed(sf::Keyboard::LControl));
+ else if(key == sf::Keyboard::E)
+ nk_input_key(ctx, NK_KEY_TEXT_LINE_END, down && sf::Keyboard::isKeyPressed(sf::Keyboard::LControl));
+ else if(key == sf::Keyboard::Up)
+ nk_input_key(ctx, NK_KEY_UP, down);
+ else if(key == sf::Keyboard::Down)
+ nk_input_key(ctx, NK_KEY_DOWN, down);
+ else if(key == sf::Keyboard::Left) {
+ if(sf::Keyboard::isKeyPressed(sf::Keyboard::LControl))
+ nk_input_key(ctx, NK_KEY_TEXT_WORD_LEFT, down);
+ else nk_input_key(ctx, NK_KEY_LEFT, down);
+ } else if(key == sf::Keyboard::Right) {
+ if(sf::Keyboard::isKeyPressed(sf::Keyboard::LControl))
+ nk_input_key(ctx, NK_KEY_TEXT_WORD_RIGHT, down);
+ else nk_input_key(ctx, NK_KEY_RIGHT, down);
+ } else return 0;
+ return 1;
+ } else if(evt->type == sf::Event::MouseButtonPressed || evt->type == sf::Event::MouseButtonReleased) {
+ int down = evt->type == sf::Event::MouseButtonPressed;
+ const int x = evt->mouseButton.x, y = evt->mouseButton.y;
+ if(evt->mouseButton.button == sf::Mouse::Left)
+ nk_input_button(ctx, NK_BUTTON_LEFT, x, y, down);
+ if(evt->mouseButton.button == sf::Mouse::Middle)
+ nk_input_button(ctx, NK_BUTTON_MIDDLE, x, y, down);
+ if(evt->mouseButton.button == sf::Mouse::Right)
+ nk_input_button(ctx, NK_BUTTON_RIGHT, x, y, down);
+ else return 0;
+ return 1;
+ } else if(evt->type == sf::Event::MouseMoved) {
+ nk_input_motion(ctx, evt->mouseMove.x, evt->mouseMove.y);
+ return 1;
+ } else if(evt->type == sf::Event::TouchBegan || evt->type == sf::Event::TouchEnded) {
+ int down = evt->type == sf::Event::TouchBegan;
+ const int x = evt->touch.x, y = evt->touch.y;
+ ctx->input.mouse.pos.x = x;
+ ctx->input.mouse.pos.y = y;
+ nk_input_button(ctx, NK_BUTTON_LEFT, x, y, down);
+ return 1;
+ } else if(evt->type == sf::Event::TouchMoved) {
+ if(ctx->input.mouse.grabbed) {
+ int x = (int)ctx->input.mouse.prev.x;
+ int y = (int)ctx->input.mouse.prev.y;
+ nk_input_motion(ctx, x + evt->touch.x, y + evt->touch.y);
+ } else nk_input_motion(ctx, evt->touch.x, evt->touch.y);
+ return 1;
+ } else if(evt->type == sf::Event::TextEntered) {
+ nk_input_unicode(ctx, evt->text.unicode);
+ return 1;
+ } else if(evt->type == sf::Event::MouseWheelScrolled) {
+ nk_input_scroll(ctx, nk_vec2(0,evt->mouseWheelScroll.delta));
+ return 1;
+ }
+ return 0;
+}
+
+NK_API
+void nk_sfml_shutdown(void)
+{
+ struct nk_sfml_device* dev = &sfml.ogl;
+ nk_font_atlas_clear(&sfml.atlas);
+ nk_free(&sfml.ctx);
+ glDeleteTextures(1, &dev->font_tex);
+ nk_buffer_free(&dev->cmds);
+ memset(&sfml, 0, sizeof(sfml));
+}
+
+#endif