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Nishi 2025-12-19 23:19:47 +09:00
commit 09763df314
Signed by: nishi
GPG key ID: 27EF69B208EB9343
7 changed files with 88 additions and 4 deletions
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74
client/gl_font.c Normal file
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#include <af_common.h>
#include <stb_image.h>
static GLuint font_atlas;
static int font_width = 0, font_height = 0;
void gl_font_init(void) {
unsigned int ch;
unsigned char* data = stbi_load(DATAROOTDIR "/assaultfish/font.png", &font_width, &font_height, &ch, 4);
glGenTextures(1, &font_atlas);
glBindTexture(GL_TEXTURE_2D, font_atlas);
if(data != NULL) {
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, font_width, font_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
free(data);
}
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glBindTexture(GL_TEXTURE_2D, 0);
}
void gl_font_text(const char* text, int x, int y, double scale) {
int i;
int gw = font_width / 16 * scale, gh = font_height / 16 * scale;
glDisable(GL_DEPTH_TEST);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, font_atlas);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glOrtho(0, MwGetInteger(opengl, MwNwidth), MwGetInteger(opengl, MwNheight), 0, -1, 1);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glBegin(GL_QUADS);
for(i = 0; text[i] != 0; i++) {
double bx = 1.0 / 16 * (text[i] % 16), by = 1.0 / 16 * (text[i] / 16);
glTexCoord2f(bx, by);
glVertex2f(i * gw + x, y);
glTexCoord2f(bx + 1.0 / 16, by);
glVertex2f(i * gw + x + gw, y);
glTexCoord2f(bx + 1.0 / 16, by + 1.0 / 16);
glVertex2f(i * gw + x + gw, y + gh);
glTexCoord2f(bx, by + 1.0 / 16);
glVertex2f(i * gw + x, y + gh);
}
glEnd();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glBindTexture(GL_TEXTURE_2D, 0);
glEnable(GL_TEXTURE_2D);
glEnable(GL_DEPTH_TEST);
}
int gl_font_width(const char* text) {
return font_width / 16 * strlen(text);
}
int gl_font_height(const char* text) {
return font_height / 16;
}