last xcb try
This commit is contained in:
Richard Gill
parent
596e5d76d9
commit
ef9fef2189
@ -80,7 +80,8 @@ main(void)
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int events;
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xcb_ctx = nk_xcb_init("Nuklear XCB/Cairo", 20, 20, 800, 600);
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cairo_ctx = nk_cairo_init(&background, NULL, nk_xcb_create_surface(xcb_ctx));
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cairo_ctx = nk_cairo_init(&background, NULL, 0, nk_xcb_create_cairo_surface(xcb_ctx));
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/*cairo_ctx = nk_cairo_init(&background, "../../extra_font/DroidSans.ttf", 0, nk_xcb_create_surface(xcb_ctx));*/
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font = nk_cairo_default_font(cairo_ctx);
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ctx = malloc(sizeof(struct nk_context));
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nk_init_default(ctx, font);
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@ -105,7 +106,7 @@ main(void)
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nk_cairo_damage(cairo_ctx);
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}
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if (events & NK_XCB_EVENT_RESIZED) {
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nk_xcb_resize_surface(xcb_ctx, nk_cairo_surface(cairo_ctx));
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nk_xcb_resize_cairo_surface(xcb_ctx, nk_cairo_surface(cairo_ctx));
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}
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/* GUI */
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@ -1,8 +1,9 @@
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/*****************************************************************************
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*
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* Nuklear XCB/Cairo Render Backend - v0.0.2
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*
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* Copyright 2021 Richard Gill
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*
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* Grabbed and adapted from https://github.com/griebd/nuklear_xcb
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* Copyright 2017 Adriano Grieb
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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@ -31,8 +32,8 @@
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*
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****************************************************************************/
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#ifndef NK_XCB_H
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#define NK_XCB_H
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#ifndef NK_XCB_CAIRO_H
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#define NK_XCB_CAIRO_H
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/* just to make my IDE happy */
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#ifndef NK_NUKLEAR_H_
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@ -42,13 +43,16 @@
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struct nk_xcb_context;
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struct nk_cairo_context;
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/* With Xcb, we work mostly on events, so to do something only when
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* needed it's good to know what kind of events pulled us from sleep
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*/
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enum nk_xcb_event_type {
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NK_XCB_EVENT_PAINT = 0x02,
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NK_XCB_EVENT_RESIZED = 0x04,
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NK_XCB_EVENT_STOP = 0x08
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};
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/* Xcb part: work on windows */
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NK_API struct nk_xcb_context *nk_xcb_init(const char *title, int pos_x, int pos_y, int width, int height);
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NK_API void nk_xcb_free(struct nk_xcb_context *xcb_ctx);
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@ -56,17 +60,22 @@ NK_API int nk_xcb_handle_event(struct nk_xcb_context *xcb_ctx, struct nk_context
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NK_API void nk_xcb_render(struct nk_xcb_context *xcb_ctx);
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NK_API void nk_xcb_size(struct nk_xcb_context *xcb_ctx, int *width, int *height);
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NK_API void *nk_xcb_create_cairo_surface(struct nk_xcb_context *xcb_ctx);
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NK_API void nk_xcb_resize_cairo_surface(struct nk_xcb_context *xcb_ctx, void *surface);
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/* TODO: copy/paste */
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NK_API struct nk_cairo_context *nk_cairo_init(struct nk_color *bg, const char *font_file, void *surface);
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/* Cairo part: work on painting */
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NK_API struct nk_cairo_context *nk_cairo_init(struct nk_color *bg, const char *font_file, double font_size, void *surface);
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NK_API void nk_cairo_free(struct nk_cairo_context *cairo_ctx);
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NK_API struct nk_user_font *nk_cairo_default_font(struct nk_cairo_context *cairo_ctx);
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NK_API void nk_cairo_damage(struct nk_cairo_context *cairo_ctx);
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NK_API int nk_cairo_render(struct nk_cairo_context *cairo_ctx, struct nk_context *ctx);
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#endif /* NK_XCB_H */
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/* Bridge between xcb and cairo (so it's possible to use them like legos) */
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NK_API void *nk_xcb_create_cairo_surface(struct nk_xcb_context *xcb_ctx);
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NK_API void nk_xcb_resize_cairo_surface(struct nk_xcb_context *xcb_ctx, void *surface);
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#endif /* NK_XCB_CAIRO_H */
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/*****************************************************************************
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*
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@ -74,14 +83,14 @@ NK_API int nk_cairo_render(struct nk_cairo_context *cairo_ctx, struct nk_context
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*
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****************************************************************************/
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/*#ifdef NK_XCB_IMPLEMENTATION*/
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/*#ifdef NK_XCB_CAIRO_IMPLEMENTATION*/
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#include <xcb/xcb.h>
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#include <xcb/xcb_util.h>
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#include <xcb/xcb_keysyms.h>
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#include <X11/keysym.h>
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#include <cairo-xcb.h>
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#include <cairo-ft.h>
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#include <cairo/cairo-xcb.h>
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#include <cairo/cairo-ft.h>
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#if defined _XOPEN_SOURCE && _XOPEN_SOURCE >= 600 || \
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defined _POSIX_C_SOURCE && _POSIX_C_SOURCE >= 200112L
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@ -426,9 +435,7 @@ NK_API void nk_xcb_size(struct nk_xcb_context *xcb_ctx, int *width, int *height)
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*height = xcb_ctx->height;
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}
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NK_API void *nk_xcb_create_surface(struct nk_xcb_context *xcb_ctx)
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NK_API void *nk_xcb_create_cairo_surface(struct nk_xcb_context *xcb_ctx)
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{
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xcb_screen_t *screen;
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xcb_visualtype_t *visual;
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@ -438,7 +445,7 @@ NK_API void *nk_xcb_create_surface(struct nk_xcb_context *xcb_ctx)
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return cairo_xcb_surface_create(xcb_ctx->conn, xcb_ctx->window, visual, xcb_ctx->width, xcb_ctx->height);
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}
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NK_API void nk_xcb_resize_surface(struct nk_xcb_context *xcb_ctx, void *surface)
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NK_API void nk_xcb_resize_cairo_surface(struct nk_xcb_context *xcb_ctx, void *surface)
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{
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cairo_xcb_surface_set_size((cairo_surface_t *)surface, xcb_ctx->width, xcb_ctx->height);
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}
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@ -462,7 +469,7 @@ NK_INTERN float nk_cairo_text_width(nk_handle handle, float height __attribute__
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return extents.x_advance;
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}
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NK_API struct nk_cairo_context *nk_cairo_init(struct nk_color *bg, const char *font_file, void *surf)
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NK_API struct nk_cairo_context *nk_cairo_init(struct nk_color *bg, const char *font_file, double font_size, void *surf)
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{
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cairo_surface_t *surface = surf;
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struct nk_cairo_context *cairo_ctx;
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@ -485,7 +492,10 @@ NK_API struct nk_cairo_context *nk_cairo_init(struct nk_color *bg, const char *f
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cairo_font_face_set_user_data(font_face, &key, face, (cairo_destroy_func_t)FT_Done_Face);
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cairo_set_font_face(cr, font_face);
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}
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cairo_set_font_size(cr, 11);
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if (font_size < 0.01) {
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font_size = 11.0;
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}
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cairo_set_font_size(cr, font_size);
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default_font = cairo_get_scaled_font(cr);
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cairo_scaled_font_extents(default_font, &extents);
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font->userdata.ptr = default_font;
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@ -558,8 +568,6 @@ NK_API int nk_cairo_render(struct nk_cairo_context *cairo_ctx, struct nk_context
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nk_foreach(cmd, nk_ctx) {
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switch (cmd->type) {
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case NK_COMMAND_NOP:
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printf("seriously\n");
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abort();
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break;
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case NK_COMMAND_SCISSOR:
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{
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@ -637,33 +645,26 @@ NK_API int nk_cairo_render(struct nk_cairo_context *cairo_ctx, struct nk_context
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break;
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case NK_COMMAND_RECT_MULTI_COLOR:
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{
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struct nk_color c0, c1;
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/* from https://github.com/taiwins/twidgets/blob/master/src/nk_wl_cairo.c */
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const struct nk_command_rect_multi_color *r = (const struct nk_command_rect_multi_color *)cmd;
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nk_uint lc = nk_color_u32(r->left), tc = nk_color_u32(r->top), rc = nk_color_u32(r->right);
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cairo_pattern_t *pat;
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double x0, x1, y0, y1;
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/* for now, only accept 2 colors gradients, so either left=right (vertical gradient) or left!=right (horizontal gradient) */
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if (nk_color_u32(r->left) == nk_color_u32(r->right)) {
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x0 = x1 = 0.0;
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y0 = 1.0;
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y1 = 0.0;
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c0 = r->top;
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c1 = r->bottom;
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cairo_pattern_t *pat = cairo_pattern_create_mesh();
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if (pat) {
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cairo_mesh_pattern_begin_patch(pat);
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cairo_mesh_pattern_move_to(pat, r->x, r->y);
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cairo_mesh_pattern_line_to(pat, r->x, r->y + r->h);
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cairo_mesh_pattern_line_to(pat, r->x + r->w, r->y + r->h);
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cairo_mesh_pattern_line_to(pat, r->x + r->w, r->y);
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cairo_mesh_pattern_set_corner_color_rgba(pat, 0, NK_TO_CAIRO(r->left.r), NK_TO_CAIRO(r->left.g), NK_TO_CAIRO(r->left.b), NK_TO_CAIRO(r->left.a));
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cairo_mesh_pattern_set_corner_color_rgba(pat, 0, NK_TO_CAIRO(r->bottom.r), NK_TO_CAIRO(r->bottom.g), NK_TO_CAIRO(r->bottom.b), NK_TO_CAIRO(r->bottom.a));
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cairo_mesh_pattern_set_corner_color_rgba(pat, 0, NK_TO_CAIRO(r->right.r), NK_TO_CAIRO(r->right.g), NK_TO_CAIRO(r->right.b), NK_TO_CAIRO(r->right.a));
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cairo_mesh_pattern_set_corner_color_rgba(pat, 0, NK_TO_CAIRO(r->top.r), NK_TO_CAIRO(r->top.g), NK_TO_CAIRO(r->top.b), NK_TO_CAIRO(r->top.a));
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cairo_mesh_pattern_end_patch(pat);
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cairo_rectangle(cr, r->x, r->y, r->w, r->h);
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cairo_set_source(cr, pat);
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cairo_fill(cr);
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cairo_pattern_destroy(pat);
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}
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else {
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y0 = y1 = 0.0;
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x0 = 0.0;
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x1 = 1.0;
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c0 = r->left;
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c1 = r->right;
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}
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pat = cairo_pattern_create_linear(x0, y0, x1, y1);
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cairo_pattern_add_color_stop_rgba(pat, 0, NK_TO_CAIRO(c0.r), NK_TO_CAIRO(c0.g), NK_TO_CAIRO(c0.b), NK_TO_CAIRO(c0.a));
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cairo_pattern_add_color_stop_rgba(pat, 1, NK_TO_CAIRO(c1.r), NK_TO_CAIRO(c1.g), NK_TO_CAIRO(c1.b), NK_TO_CAIRO(c1.a));
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cairo_rectangle(cr, r->x, r->y, r->w, r->h);
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cairo_set_source(cr, pat);
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cairo_fill(cr);
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cairo_pattern_destroy(pat);
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}
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break;
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case NK_COMMAND_CIRCLE:
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@ -796,14 +797,45 @@ NK_API int nk_cairo_render(struct nk_cairo_context *cairo_ctx, struct nk_context
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break;
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case NK_COMMAND_IMAGE:
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{
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printf ("TODO: NK_COMMAND_IMAGE\n");
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/* TODO */
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/* from https://github.com/taiwins/twidgets/blob/master/src/nk_wl_cairo.c */
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const struct nk_command_image *im = (const struct nk_command_image *)cmd;
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cairo_surface_t *img_surf;
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double sw = (double)im->w / (double)im->img.region[2];
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double sh = (double)im->h / (double)im->img.region[3];
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cairo_format_t format = CAIRO_FORMAT_ARGB32;
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int stride = cairo_format_stride_for_width(format, im->img.w);
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if (!im->img.handle.ptr) return;
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img_surf = cairo_image_surface_create_for_data(im->img.handle.ptr, format, im->img.w, im->img.h, stride);
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if (!img_surf) return;
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cairo_save(cr);
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cairo_rectangle(cr, im->x, im->y, im->w, im->h);
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/* scale here, if after source set, the scale would not apply to source
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* surface
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*/
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cairo_scale(cr, sw, sh);
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/* the coordinates system in cairo is not intuitive, scale, translate,
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* are applied to source. Refer to
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* "https://www.cairographics.org/FAQ/#paint_from_a_surface" for details
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*
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* if you set source_origin to (0,0), it would be like source origin
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* aligned to dest origin, then if you draw a rectangle on (x, y, w, h).
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* it would clip out the (x, y, w, h) of the source on you dest as well.
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*/
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cairo_set_source_surface(cr, img_surf, im->x/sw - im->img.region[0], im->y/sh - im->img.region[1]);
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cairo_fill(cr);
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cairo_restore(cr);
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cairo_surface_destroy(img_surf);
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}
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break;
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case NK_COMMAND_CUSTOM:
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{
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printf ("TODO: NK_COMMAND_CUSTOM\n");
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/* TODO */
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const struct nk_command_custom *cu = (const struct nk_command_custom *)cmd;
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if (cu->callback) {
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cu->callback(cr, cu->x, cu->y, cu->w, cu->h, cu->callback_data);
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}
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}
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default:
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break;
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@ -817,4 +849,4 @@ NK_API int nk_cairo_render(struct nk_cairo_context *cairo_ctx, struct nk_context
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return nk_true;
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}
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/*#endif /* NK_XCB_IMPLEMENTATION */
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/*#endif /* NK_XCB_CAIRO_IMPLEMENTATION */
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