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99 lines
2.8 KiB
99 lines
2.8 KiB
#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 <GLES3/gl3.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 "common/framebuffer.h"
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int main(int argc, char** argv) {
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int err;
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const char* spintext = NULL;
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if (argc >= 2) {
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spintext = argv[1];
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}
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// spinner
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int fb_w, fb_h;
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EGLDisplay display;
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EGLSurface surface;
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FramebufferState *fb = framebuffer_init("spinner", 0x00001000, false,
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&display, &surface, &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 = nvgCreateFont(vg, "Bold", "../../assets/OpenSans-SemiBold.ttf");
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assert(font >= 0);
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int spinner_img = nvgCreateImage(vg, "../../assets/img_spinner_track.png", 0);
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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 = nvgCreateImage(vg, "../../assets/img_spinner_comma.png", 0);
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assert(spinner_comma_img >= 0);
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for (int cnt = 0; ; cnt++) {
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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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// message
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if (spintext) {
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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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eglSwapBuffers(display, surface);
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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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