rayfract
diff src/imtk/draw.c @ 10:1496aae2e7d4
- simplified build by including dependences in the source tree
- added make dep tracking
- added mingw cross-build rules
- added readme & licence
| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Mon, 31 Jul 2023 18:58:56 +0300 |
| parents | |
| children |
line diff
1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/src/imtk/draw.c Mon Jul 31 18:58:56 2023 +0300 1.3 @@ -0,0 +1,268 @@ 1.4 +#include <string.h> 1.5 +#include <math.h> 1.6 +#include <assert.h> 1.7 +#include "draw.h" 1.8 +#include "imtk.h" 1.9 + 1.10 +#define COLOR_MASK 0xff 1.11 + 1.12 +/* default colors, can be changed with imtk_set_color */ 1.13 +static float colors[][4] = { 1.14 + {0.0, 0.0, 0.0, 1.0}, /* text color */ 1.15 + {0.75, 0.75, 0.75, 1.0}, /* top color */ 1.16 + {0.56, 0.56, 0.56, 1.0}, /* bot color */ 1.17 + {0.9, 0.9, 0.9, 1.0}, /* lit bevel */ 1.18 + {0.3, 0.3, 0.3, 1.0}, /* shadowed bevel */ 1.19 + {0.8, 0.25, 0.18, 1.0}, /* cursor color */ 1.20 + {0.68, 0.85, 1.3, 1.0}, /* selection color */ 1.21 + {0.75, 0.1, 0.095, 1.0} /* check color */ 1.22 +}; 1.23 + 1.24 +static float focus_factor = 1.15; 1.25 +static float press_factor = 0.8; 1.26 +static float alpha = 1.0; 1.27 +static float bevel = 1.0; 1.28 + 1.29 +void imtk_set_color(unsigned int col, float r, float g, float b, float a) 1.30 +{ 1.31 + int idx = col & COLOR_MASK; 1.32 + assert(idx >= 0 && idx < sizeof colors / sizeof *colors); 1.33 + 1.34 + colors[idx][0] = r; 1.35 + colors[idx][1] = g; 1.36 + colors[idx][2] = b; 1.37 + colors[idx][3] = a; 1.38 +} 1.39 + 1.40 +float *imtk_get_color(unsigned int col) 1.41 +{ 1.42 + static float ret[4]; 1.43 + int idx = col & COLOR_MASK; 1.44 + 1.45 + memcpy(ret, colors + idx, sizeof ret); 1.46 + if(col & IMTK_FOCUS_BIT) { 1.47 + ret[0] *= focus_factor; 1.48 + ret[1] *= focus_factor; 1.49 + ret[2] *= focus_factor; 1.50 + } 1.51 + if(col & IMTK_PRESS_BIT) { 1.52 + ret[0] *= press_factor; 1.53 + ret[1] *= press_factor; 1.54 + ret[2] *= press_factor; 1.55 + } 1.56 + if(col & IMTK_SEL_BIT) { 1.57 + ret[0] *= colors[IMTK_SELECTION_COLOR][0]; 1.58 + ret[1] *= colors[IMTK_SELECTION_COLOR][1]; 1.59 + ret[2] *= colors[IMTK_SELECTION_COLOR][2]; 1.60 + } 1.61 + ret[3] *= alpha; 1.62 + return ret; 1.63 +} 1.64 + 1.65 +void imtk_set_alpha(float a) 1.66 +{ 1.67 + alpha = a; 1.68 +} 1.69 + 1.70 +float imtk_get_alpha(void) 1.71 +{ 1.72 + return alpha; 1.73 +} 1.74 + 1.75 +void imtk_set_bevel_width(float b) 1.76 +{ 1.77 + bevel = b; 1.78 +} 1.79 + 1.80 +float imtk_get_bevel_width(void) 1.81 +{ 1.82 + return bevel; 1.83 +} 1.84 + 1.85 +void imtk_set_focus_factor(float fact) 1.86 +{ 1.87 + focus_factor = fact; 1.88 +} 1.89 + 1.90 +float imtk_get_focus_factor(void) 1.91 +{ 1.92 + return focus_factor; 1.93 +} 1.94 + 1.95 +void imtk_set_press_factor(float fact) 1.96 +{ 1.97 + press_factor = fact; 1.98 +} 1.99 + 1.100 +float imtk_get_press_factor(void) 1.101 +{ 1.102 + return press_factor; 1.103 +} 1.104 + 1.105 +void imtk_draw_rect(int x, int y, int w, int h, float *ctop, float *cbot) 1.106 +{ 1.107 + glBegin(GL_QUADS); 1.108 + if(ctop) { 1.109 + glColor4fv(ctop); 1.110 + } 1.111 + glVertex2f(x, y); 1.112 + glVertex2f(x + w, y); 1.113 + 1.114 + if(cbot) { 1.115 + glColor4fv(cbot); 1.116 + } 1.117 + glVertex2f(x + w, y + h); 1.118 + glVertex2f(x, y + h); 1.119 + glEnd(); 1.120 +} 1.121 + 1.122 +void imtk_draw_frame(int x, int y, int w, int h, int style) 1.123 +{ 1.124 + float tcol[4], bcol[4]; 1.125 + float b = imtk_get_bevel_width(); 1.126 + 1.127 + if(!b) { 1.128 + return; 1.129 + } 1.130 + 1.131 + x -= b; 1.132 + y -= b; 1.133 + w += b * 2; 1.134 + h += b * 2; 1.135 + 1.136 + switch(style) { 1.137 + case FRAME_INSET: 1.138 + memcpy(tcol, imtk_get_color(IMTK_BEVEL_SHAD_COLOR), sizeof tcol); 1.139 + memcpy(bcol, imtk_get_color(IMTK_BEVEL_LIT_COLOR), sizeof bcol); 1.140 + break; 1.141 + 1.142 + case FRAME_OUTSET: 1.143 + default: 1.144 + memcpy(tcol, imtk_get_color(IMTK_BEVEL_LIT_COLOR), sizeof tcol); 1.145 + memcpy(bcol, imtk_get_color(IMTK_BEVEL_SHAD_COLOR), sizeof bcol); 1.146 + } 1.147 + 1.148 + glBegin(GL_QUADS); 1.149 + glColor4fv(tcol); 1.150 + glVertex2f(x, y); 1.151 + glVertex2f(x + b, y + b); 1.152 + glVertex2f(x + w - b, y + b); 1.153 + glVertex2f(x + w, y); 1.154 + 1.155 + glVertex2f(x + b, y + b); 1.156 + glVertex2f(x, y); 1.157 + glVertex2f(x, y + h); 1.158 + glVertex2f(x + b, y + h - b); 1.159 + 1.160 + glColor4fv(bcol); 1.161 + glVertex2f(x + b, y + h - b); 1.162 + glVertex2f(x + w - b, y + h - b); 1.163 + glVertex2f(x + w, y + h); 1.164 + glVertex2f(x, y + h); 1.165 + 1.166 + glVertex2f(x + w - b, y + b); 1.167 + glVertex2f(x + w, y); 1.168 + glVertex2f(x + w, y + h); 1.169 + glVertex2f(x + w - b, y + h - b); 1.170 + glEnd(); 1.171 +} 1.172 + 1.173 +void imtk_draw_disc(int x, int y, float rad, int subdiv, float *ctop, float *cbot) 1.174 +{ 1.175 + int i; 1.176 + float t, dtheta, theta = 0.0; 1.177 + float color[4]; 1.178 + float cx = (float)x; 1.179 + float cy = (float)y; 1.180 + 1.181 + subdiv += 3; 1.182 + dtheta = 2.0 * M_PI / subdiv; 1.183 + 1.184 + color[0] = (ctop[0] + cbot[0]) * 0.5; 1.185 + color[1] = (ctop[1] + cbot[1]) * 0.5; 1.186 + color[2] = (ctop[2] + cbot[2]) * 0.5; 1.187 + color[3] = (ctop[3] + cbot[3]) * 0.5; 1.188 + 1.189 + glBegin(GL_TRIANGLE_FAN); 1.190 + glColor4fv(color); 1.191 + glVertex2f(cx, cy); 1.192 + 1.193 + for(i=0; i<=subdiv; i++) { 1.194 + float vx, vy; 1.195 + 1.196 + vx = cos(theta); 1.197 + vy = sin(theta); 1.198 + theta += dtheta; 1.199 + 1.200 + t = (vy + 1.0) / 2.0; 1.201 + color[0] = ctop[0] + (cbot[0] - ctop[0]) * t; 1.202 + color[1] = ctop[1] + (cbot[1] - ctop[1]) * t; 1.203 + color[2] = ctop[2] + (cbot[2] - ctop[2]) * t; 1.204 + color[3] = ctop[3] + (cbot[3] - ctop[3]) * t; 1.205 + 1.206 + glColor4fv(color); 1.207 + glVertex2f(cx + vx * rad, cy + vy * rad); 1.208 + } 1.209 + glEnd(); 1.210 +} 1.211 + 1.212 +void imtk_draw_disc_frame(int x, int y, float inner, float outer, int subdiv, int style) 1.213 +{ 1.214 + int i; 1.215 + float t, dtheta, theta = 0.0; 1.216 + float color[4], tcol[4], bcol[4]; 1.217 + float cx = (float)x; 1.218 + float cy = (float)y; 1.219 + 1.220 + switch(style) { 1.221 + case FRAME_INSET: 1.222 + memcpy(tcol, imtk_get_color(IMTK_BEVEL_SHAD_COLOR), sizeof tcol); 1.223 + memcpy(bcol, imtk_get_color(IMTK_BEVEL_LIT_COLOR), sizeof bcol); 1.224 + break; 1.225 + 1.226 + case FRAME_OUTSET: 1.227 + default: 1.228 + memcpy(tcol, imtk_get_color(IMTK_BEVEL_LIT_COLOR), sizeof tcol); 1.229 + memcpy(bcol, imtk_get_color(IMTK_BEVEL_SHAD_COLOR), sizeof bcol); 1.230 + } 1.231 + 1.232 + subdiv += 3; 1.233 + dtheta = 2.0 * M_PI / subdiv; 1.234 + 1.235 + glBegin(GL_QUAD_STRIP); 1.236 + 1.237 + for(i=0; i<=subdiv; i++) { 1.238 + float vx, vy; 1.239 + 1.240 + vx = cos(theta); 1.241 + vy = sin(theta); 1.242 + 1.243 + t = (vy + 1.0) / 2.0; 1.244 + color[0] = tcol[0] + (bcol[0] - tcol[0]) * t; 1.245 + color[1] = tcol[1] + (bcol[1] - tcol[1]) * t; 1.246 + color[2] = tcol[2] + (bcol[2] - tcol[2]) * t; 1.247 + color[3] = tcol[3] + (bcol[3] - tcol[3]) * t; 1.248 + 1.249 + vx = cos(theta - M_PI / 4.0); 1.250 + vy = sin(theta - M_PI / 4.0); 1.251 + theta += dtheta; 1.252 + 1.253 + glColor4fv(color); 1.254 + glVertex2f(cx + vx * inner, cy + vy * inner); 1.255 + glVertex2f(cx + vx * outer, cy + vy * outer); 1.256 + } 1.257 + glEnd(); 1.258 +} 1.259 + 1.260 +void imtk_draw_string(int x, int y, const char *str) 1.261 +{ 1.262 + glRasterPos2i(x, y); 1.263 + while(*str) { 1.264 + glutBitmapCharacter(GLUT_BITMAP_HELVETICA_12, *str++); 1.265 + } 1.266 +} 1.267 + 1.268 +int imtk_string_size(const char *str) 1.269 +{ 1.270 + return glutBitmapLength(GLUT_BITMAP_HELVETICA_12, (const unsigned char*)str); 1.271 +}