183 lines
5.4 KiB
C
183 lines
5.4 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <math.h>
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#include <unistd.h>
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#include <assert.h>
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#include <ctype.h>
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#include <GLES3/gl3.h>
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#include <EGL/egl.h>
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#include <EGL/eglext.h>
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#include "nanovg.h"
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#define NANOVG_GLES3_IMPLEMENTATION
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#include "nanovg_gl.h"
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#include "nanovg_gl_utils.h"
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#include "framebuffer.h"
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#include "spinner.h"
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#define SPINTEXT_LENGTH 128
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// external resources linked in
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extern const unsigned char _binary_opensans_semibold_ttf_start[];
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extern const unsigned char _binary_opensans_semibold_ttf_end[];
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extern const unsigned char _binary_img_spinner_track_png_start[];
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extern const unsigned char _binary_img_spinner_track_png_end[];
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extern const unsigned char _binary_img_spinner_comma_png_start[];
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extern const unsigned char _binary_img_spinner_comma_png_end[];
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bool stdin_input_available() {
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struct timeval timeout;
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timeout.tv_sec = 0;
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timeout.tv_usec = 0;
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fd_set fds;
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FD_ZERO(&fds);
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FD_SET(STDIN_FILENO, &fds);
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select(STDIN_FILENO+1, &fds, NULL, NULL, &timeout);
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return (FD_ISSET(0, &fds));
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}
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int spin(int argc, char** argv) {
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int err;
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bool draw_progress = false;
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float progress_val = 0.0;
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char spintext[SPINTEXT_LENGTH];
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spintext[0] = 0;
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const char* spintext_arg = NULL;
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if (argc >= 2) {
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strncpy(spintext, argv[1], SPINTEXT_LENGTH);
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}
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// spinner
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int fb_w, fb_h;
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FramebufferState *fb = framebuffer_init("spinner", 0x00001000, false,
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&fb_w, &fb_h);
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assert(fb);
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NVGcontext *vg = nvgCreateGLES3(NVG_ANTIALIAS | NVG_STENCIL_STROKES);
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assert(vg);
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int font = nvgCreateFontMem(vg, "Bold", (unsigned char*)_binary_opensans_semibold_ttf_start, _binary_opensans_semibold_ttf_end-_binary_opensans_semibold_ttf_start, 0);
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assert(font >= 0);
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int spinner_img = nvgCreateImageMem(vg, 0, (unsigned char*)_binary_img_spinner_track_png_start, _binary_img_spinner_track_png_end - _binary_img_spinner_track_png_start);
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assert(spinner_img >= 0);
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int spinner_img_s = 360;
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int spinner_img_x = ((fb_w/2)-(spinner_img_s/2));
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int spinner_img_y = 260;
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int spinner_img_xc = (fb_w/2);
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int spinner_img_yc = (fb_h/2)-100;
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int spinner_comma_img = nvgCreateImageMem(vg, 0, (unsigned char*)_binary_img_spinner_comma_png_start, _binary_img_spinner_comma_png_end - _binary_img_spinner_comma_png_start);
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assert(spinner_comma_img >= 0);
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for (int cnt = 0; ; cnt++) {
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// Check stdin for new text
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if (stdin_input_available()){
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fgets(spintext, SPINTEXT_LENGTH, stdin);
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spintext[strcspn(spintext, "\n")] = 0;
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// Check if number (update progress bar)
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size_t len = strlen(spintext);
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bool is_number = len > 0;
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for (int i = 0; i < len; i++){
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if (!isdigit(spintext[i])){
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is_number = false;
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break;
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}
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}
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if (is_number) {
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progress_val = (float)(atoi(spintext)) / 100.0;
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progress_val = fmin(1.0, progress_val);
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progress_val = fmax(0.0, progress_val);
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}
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draw_progress = is_number;
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}
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glClearColor(0.1, 0.1, 0.1, 1.0);
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glClear(GL_STENCIL_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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nvgBeginFrame(vg, fb_w, fb_h, 1.0f);
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// background
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nvgBeginPath(vg);
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NVGpaint bg = nvgLinearGradient(vg, fb_w, 0, fb_w, fb_h,
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nvgRGBA(0, 0, 0, 175), nvgRGBA(0, 0, 0, 255));
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nvgFillPaint(vg, bg);
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nvgRect(vg, 0, 0, fb_w, fb_h);
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nvgFill(vg);
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// spin track
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nvgSave(vg);
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nvgTranslate(vg, spinner_img_xc, spinner_img_yc);
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nvgRotate(vg, (3.75*M_PI * cnt/120.0));
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nvgTranslate(vg, -spinner_img_xc, -spinner_img_yc);
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NVGpaint spinner_imgPaint = nvgImagePattern(vg, spinner_img_x, spinner_img_y,
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spinner_img_s, spinner_img_s, 0, spinner_img, 0.6f);
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nvgBeginPath(vg);
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nvgFillPaint(vg, spinner_imgPaint);
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nvgRect(vg, spinner_img_x, spinner_img_y, spinner_img_s, spinner_img_s);
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nvgFill(vg);
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nvgRestore(vg);
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// comma
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NVGpaint comma_imgPaint = nvgImagePattern(vg, spinner_img_x, spinner_img_y,
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spinner_img_s, spinner_img_s, 0, spinner_comma_img, 1.0f);
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nvgBeginPath(vg);
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nvgFillPaint(vg, comma_imgPaint);
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nvgRect(vg, spinner_img_x, spinner_img_y, spinner_img_s, spinner_img_s);
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nvgFill(vg);
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if (draw_progress){
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// draw progress bar
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int progress_width = 1000;
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int progress_x = fb_w/2-progress_width/2;
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int progress_y = 775;
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int progress_height = 25;
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NVGpaint paint = nvgBoxGradient(
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vg, progress_x + 1, progress_y + 1,
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progress_width - 2, progress_height, 3, 4, nvgRGB(27, 27, 27), nvgRGB(27, 27, 27));
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nvgBeginPath(vg);
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nvgRoundedRect(vg, progress_x, progress_y, progress_width, progress_height, 12);
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nvgFillPaint(vg, paint);
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nvgFill(vg);
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int bar_pos = ((progress_width - 2) * progress_val);
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paint = nvgBoxGradient(
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vg, progress_x, progress_y,
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bar_pos+1.5f, progress_height-1, 3, 4,
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nvgRGB(245, 245, 245), nvgRGB(105, 105, 105));
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nvgBeginPath(vg);
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nvgRoundedRect(
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vg, progress_x+1, progress_y+1,
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bar_pos, progress_height-2, 12);
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nvgFillPaint(vg, paint);
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nvgFill(vg);
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} else {
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// message
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nvgTextAlign(vg, NVG_ALIGN_CENTER | NVG_ALIGN_TOP);
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nvgFontSize(vg, 96.0f);
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nvgText(vg, fb_w/2, (fb_h*2/3)+24, spintext, NULL);
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}
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nvgEndFrame(vg);
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framebuffer_swap(fb);
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assert(glGetError() == GL_NO_ERROR);
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}
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return 0;
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}
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