333 lines
8.4 KiB
C
333 lines
8.4 KiB
C
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#pragma warning(disable:4244; disable:4305; disable:4018)
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#include <assert.h>
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#include <ctype.h>
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#define STB_WINMAIN
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#include "stb_wingraph.h"
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#define STB_TRUETYPE_IMPLEMENTATION
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#define STB_RECT_PACK_IMPLEMENTATION
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#include "stb_rect_pack.h"
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#include "stb_truetype.h"
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#ifndef WINGDIAPI
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#define CALLBACK __stdcall
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#define WINGDIAPI __declspec(dllimport)
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#define APIENTRY __stdcall
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#endif
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#include <gl/gl.h>
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#include <gl/glu.h>
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#define GL_FRAMEBUFFER_SRGB_EXT 0x8DB9
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#define SIZE_X 1024
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#define SIZE_Y 768
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stbtt_packedchar chardata[6][128];
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int sx=SIZE_X, sy=SIZE_Y;
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#define BITMAP_W 512
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#define BITMAP_H 512
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unsigned char temp_bitmap[BITMAP_W][BITMAP_H];
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unsigned char ttf_buffer[1 << 25];
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GLuint font_tex;
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float scale[2] = { 24.0f, 14.0f };
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int sf[6] = { 0,1,2, 0,1,2 };
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void load_fonts(void)
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{
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stbtt_pack_context pc;
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int i;
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FILE *f;
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char filename[256];
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char *win = getenv("windir");
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if (win == NULL) win = getenv("SystemRoot");
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f = fopen(stb_wingraph_commandline, "rb");
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if (!f) {
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if (win == NULL)
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sprintf(filename, "arial.ttf", win);
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else
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sprintf(filename, "%s/fonts/arial.ttf", win);
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f = fopen(filename, "rb");
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if (!f) exit(0);
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}
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fread(ttf_buffer, 1, 1<<25, f);
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stbtt_PackBegin(&pc, temp_bitmap[0], BITMAP_W, BITMAP_H, 0, 1, NULL);
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for (i=0; i < 2; ++i) {
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stbtt_PackSetOversampling(&pc, 1, 1);
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stbtt_PackFontRange(&pc, ttf_buffer, 0, scale[i], 32, 95, chardata[i*3+0]+32);
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stbtt_PackSetOversampling(&pc, 2, 2);
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stbtt_PackFontRange(&pc, ttf_buffer, 0, scale[i], 32, 95, chardata[i*3+1]+32);
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stbtt_PackSetOversampling(&pc, 3, 1);
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stbtt_PackFontRange(&pc, ttf_buffer, 0, scale[i], 32, 95, chardata[i*3+2]+32);
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}
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stbtt_PackEnd(&pc);
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glGenTextures(1, &font_tex);
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glBindTexture(GL_TEXTURE_2D, font_tex);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, BITMAP_W, BITMAP_H, 0, GL_ALPHA, GL_UNSIGNED_BYTE, temp_bitmap);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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}
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int black_on_white;
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void draw_init(void)
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{
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glDisable(GL_CULL_FACE);
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glDisable(GL_TEXTURE_2D);
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glDisable(GL_LIGHTING);
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glDisable(GL_DEPTH_TEST);
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glViewport(0,0,sx,sy);
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if (black_on_white)
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glClearColor(255,255,255,0);
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else
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glClearColor(0,0,0,0);
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glClear(GL_COLOR_BUFFER_BIT);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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gluOrtho2D(0,sx,sy,0);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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}
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void drawBoxTC(float x0, float y0, float x1, float y1, float s0, float t0, float s1, float t1)
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{
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glTexCoord2f(s0,t0); glVertex2f(x0,y0);
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glTexCoord2f(s1,t0); glVertex2f(x1,y0);
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glTexCoord2f(s1,t1); glVertex2f(x1,y1);
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glTexCoord2f(s0,t1); glVertex2f(x0,y1);
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}
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int integer_align;
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void print(float x, float y, int font, char *text)
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{
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glEnable(GL_TEXTURE_2D);
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glBindTexture(GL_TEXTURE_2D, font_tex);
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glBegin(GL_QUADS);
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while (*text) {
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stbtt_aligned_quad q;
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stbtt_GetPackedQuad(chardata[font], BITMAP_W, BITMAP_H, *text++, &x, &y, &q, font ? 0 : integer_align);
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drawBoxTC(q.x0,q.y0,q.x1,q.y1, q.s0,q.t0,q.s1,q.t1);
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}
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glEnd();
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}
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int font=3;
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int translating;
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int rotating=0;
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int srgb=0;
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float rotate_t, translate_t;
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int show_tex;
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void draw_world(void)
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{
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int sfont = sf[font];
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float x = 20;
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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if (black_on_white)
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glColor3f(0,0,0);
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else
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glColor3f(1,1,1);
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print(80, 30, sfont, "Controls:");
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print(100, 60, sfont, "S: toggle font size");
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print(100, 85, sfont, "O: toggle oversampling");
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print(100,110, sfont, "T: toggle translation");
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print(100,135, sfont, "R: toggle rotation");
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print(100,160, sfont, "P: toggle pixel-snap (only non-oversampled)");
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print(100,185, sfont, "G: toggle srgb gamma-correction");
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if (black_on_white)
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print(100,210, sfont, "B: toggle to white-on-black");
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else
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print(100,210, sfont, "B: toggle to black-on-white");
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print(100,235, sfont, "V: view font texture");
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print(80, 300, sfont, "Current font:");
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if (!show_tex) {
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if (font < 3)
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print(100, 350, sfont, "Font height: 24 pixels");
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else
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print(100, 350, sfont, "Font height: 14 pixels");
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}
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if (font%3==1)
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print(100, 325, sfont, "2x2 oversampled text at 1:1");
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else if (font%3 == 2)
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print(100, 325, sfont, "3x1 oversampled text at 1:1");
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else if (integer_align)
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print(100, 325, sfont, "1:1 text, one texel = one pixel, snapped to integer coordinates");
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else
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print(100, 325, sfont, "1:1 text, one texel = one pixel");
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if (show_tex) {
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glBegin(GL_QUADS);
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drawBoxTC(200,400, 200+BITMAP_W,300+BITMAP_H, 0,0,1,1);
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glEnd();
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} else {
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glMatrixMode(GL_MODELVIEW);
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glTranslatef(200,350,0);
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if (translating)
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x += fmod(translate_t*8,30);
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if (rotating) {
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glTranslatef(100,150,0);
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glRotatef(rotate_t*2,0,0,1);
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glTranslatef(-100,-150,0);
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}
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print(x,100, font, "This is a test");
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print(x,130, font, "Now is the time for all good men to come to the aid of their country.");
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print(x,160, font, "The quick brown fox jumps over the lazy dog.");
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print(x,190, font, "0123456789");
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}
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}
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void draw(void)
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{
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draw_init();
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draw_world();
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stbwingraph_SwapBuffers(NULL);
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}
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static int initialized=0;
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static float last_dt;
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int move[4];
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int raw_mouse_x, raw_mouse_y;
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int loopmode(float dt, int real, int in_client)
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{
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float actual_dt = dt;
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if (!initialized) return 0;
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rotate_t += dt;
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translate_t += dt;
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// music_sim();
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if (!real)
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return 0;
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if (dt > 0.25) dt = 0.25;
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if (dt < 0.01) dt = 0.01;
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draw();
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return 0;
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}
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int winproc(void *data, stbwingraph_event *e)
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{
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switch (e->type) {
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case STBWGE_create:
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break;
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case STBWGE_char:
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switch(e->key) {
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case 27:
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stbwingraph_ShowCursor(NULL,1);
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return STBWINGRAPH_winproc_exit;
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break;
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case 'o': case 'O':
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font = (font+1) % 3 + (font/3)*3;
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break;
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case 's': case 'S':
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font = (font+3) % 6;
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break;
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case 't': case 'T':
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translating = !translating;
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translate_t = 0;
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break;
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case 'r': case 'R':
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rotating = !rotating;
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rotate_t = 0;
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break;
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case 'p': case 'P':
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integer_align = !integer_align;
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break;
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case 'g': case 'G':
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srgb = !srgb;
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if (srgb)
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glEnable(GL_FRAMEBUFFER_SRGB_EXT);
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else
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glDisable(GL_FRAMEBUFFER_SRGB_EXT);
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break;
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case 'v': case 'V':
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show_tex = !show_tex;
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break;
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case 'b': case 'B':
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black_on_white = !black_on_white;
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break;
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}
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break;
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case STBWGE_mousemove:
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raw_mouse_x = e->mx;
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raw_mouse_y = e->my;
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break;
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#if 0
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case STBWGE_mousewheel: do_mouse(e,0,0); break;
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case STBWGE_leftdown: do_mouse(e, 1,0); break;
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case STBWGE_leftup: do_mouse(e,-1,0); break;
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case STBWGE_rightdown: do_mouse(e,0, 1); break;
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case STBWGE_rightup: do_mouse(e,0,-1); break;
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#endif
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case STBWGE_keydown:
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if (e->key == VK_RIGHT) move[0] = 1;
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if (e->key == VK_LEFT) move[1] = 1;
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if (e->key == VK_UP) move[2] = 1;
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if (e->key == VK_DOWN) move[3] = 1;
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break;
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case STBWGE_keyup:
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if (e->key == VK_RIGHT) move[0] = 0;
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if (e->key == VK_LEFT) move[1] = 0;
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if (e->key == VK_UP) move[2] = 0;
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if (e->key == VK_DOWN) move[3] = 0;
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break;
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case STBWGE_size:
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sx = e->width;
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sy = e->height;
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loopmode(0,1,0);
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break;
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case STBWGE_draw:
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if (initialized)
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loopmode(0,1,0);
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break;
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default:
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return STBWINGRAPH_unprocessed;
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}
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return 0;
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}
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void stbwingraph_main(void)
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{
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stbwingraph_Priority(2);
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stbwingraph_CreateWindow(1, winproc, NULL, "tt", SIZE_X,SIZE_Y, 0, 1, 0, 0);
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stbwingraph_ShowCursor(NULL, 0);
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load_fonts();
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initialized = 1;
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stbwingraph_MainLoop(loopmode, 0.016f); // 30 fps = 0.33
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}
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