add font support

Makefile

@@ -37,7 +37,7 @@ MSVCSRC    = $(patsubst %,<ClCompile Include=\"%\\\" \\/>,$(SOURCES))
 OBJ        = $(SOURCES:.c=.o)
 DOXYFILE   = documentation/Doxyfile
 VSCFILES   = $(PROGNAME).vcxproj $(PROGNAME).sln
-EXTRAFILES = COPYING $(wildcard shaders/*.?s images/*.png) $(VSCFILES)
+EXTRAFILES = COPYING $(wildcard shaders/*.?s images/*.png fonts/*.ttf) $(VSCFILES)
 DISTFILES  = $(SOURCES) Makefile $(HEADERS) $(DOXYFILE) $(EXTRAFILES)
 
 # API 8

includes/animations.h

@@ -3,6 +3,7 @@
 
 #include <GL4D/gl4dh.h>
 #include <GL4D/gl4duw_SDL2.h>
+#include <SDL_ttf.h>
 
 #include "audio.h"
 

main.c

@@ -29,7 +29,7 @@ int main(int argc, char *argv[]) {
 
   // Animations
   GL4DHanime animations[] = {{7000, lights, NULL, NULL},
-                             {3000, credits, NULL, NULL},
+                             {10000, credits, NULL, NULL},
                              {0, NULL, NULL, NULL}};
 
   gl4dhInit(animations, _dims[0], _dims[1], NULL);

shaders/credits.fs

@@ -0,0 +1,9 @@
+#version 330
+uniform sampler2D tex;
+in vec2 vsoTexCoord;
+out vec4 fragColor;
+
+void main(void) {
+  vec4 c = texture(tex, vsoTexCoord);
+  fragColor = vec4(c.rgb, length(c.rgb) > 0.0 ? 1.0 : 0.0);
+}

shaders/credits.vs

@@ -0,0 +1,16 @@
+#version 330
+
+layout(location = 0) in vec3 vsiPosition;
+layout(location = 2) in vec2 vsiTexCoord;
+uniform int inv;
+uniform mat4 modview, proj;
+out vec2 vsoTexCoord;
+
+void main(void) {
+  gl_Position = proj * modview * vec4(vsiPosition, 1.0);
+  if(inv != 0) {
+    vsoTexCoord = vec2(vsiTexCoord.s, 1.0 - vsiTexCoord.t);
+  } else {
+    vsoTexCoord = vec2(vsiTexCoord.s, vsiTexCoord.t);
+  }
+}

src/credits.c

@@ -1,10 +1,14 @@
 #include "../includes/animations.h"
 
+static GLuint _pId = 0;
+static GLuint _textTexId = 0;
+static GLuint _quadId = 0;
+
 // Initialize
-static void init();
+static void init(void);
 
 // Draw
-static void draw();
+static void draw(void);
 
 void credits(int state) {
   switch (state) {
@@ -21,6 +25,88 @@ void credits(int state) {
   }
 }
 
-static void init() {}
+static void init(void) {
+  _pId = gl4duCreateProgram("<vs>shaders/credits.vs", "<fs>shaders/credits.fs",
+                            NULL);
+  gl4duGenMatrix(GL_FLOAT, "modview");
+  gl4duGenMatrix(GL_FLOAT, "proj");
+  _quadId = gl4dgGenQuadf();
 
-static void draw() {}
+  // Font
+  char *text = "                    CRÉDITS\n\n"
+               "Concours API8 — 7 édition\n"
+               "Font: fontesk et fontsquirrel\n"
+               "Librairies: GL4D, SDL2 et extensions";
+  char *fontName = "fonts/Instrument.ttf";
+
+  SDL_Color c = {255, 255, 255, 255};
+  SDL_Surface *d, *s;
+  TTF_Font *font = NULL;
+
+  if (TTF_Init() == -1) {
+    fprintf(stderr, "Erreur TTF : %s\n", TTF_GetError());
+    exit(2);
+  }
+
+  glGenTextures(1, &_textTexId);
+  glBindTexture(GL_TEXTURE_2D, _textTexId);
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+
+  if (!(font = TTF_OpenFont(fontName, 100))) {
+    fprintf(stderr, "Erreur TTF : %s\n", TTF_GetError());
+    exit(2);
+  }
+
+  if ((d = TTF_RenderUTF8_Blended_Wrapped(font, text, c, 0)) == NULL) {
+    TTF_CloseFont(font);
+    fprintf(stderr, "Erreur TTF : RenderText\n");
+    exit(2);
+  }
+
+  assert((s = SDL_CreateRGBSurface(0, d->w, d->h, 32, R_MASK, G_MASK, B_MASK,
+                                   A_MASK)));
+  SDL_BlitSurface(d, NULL, s, NULL);
+  SDL_FreeSurface(d);
+
+  glBindTexture(GL_TEXTURE_2D, _textTexId);
+  glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, s->w, s->h, 0, GL_RGBA,
+               GL_UNSIGNED_BYTE, s->pixels);
+
+  SDL_FreeSurface(s);
+  TTF_CloseFont(font);
+  glBindTexture(GL_TEXTURE_2D, 0);
+}
+
+static void draw(void) {
+  glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
+  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+  static Uint32 t0 = -1;
+  GLfloat t, d;
+  if (t0 < 0.0f)
+    t0 = SDL_GetTicks();
+  t = (GLfloat)(SDL_GetTicks() - t0) / 1000.f;
+  d = -1.1f + .25f * t;
+
+  GLfloat ratio = (GLfloat)_dims[0] / (GLfloat)_dims[1];
+  gl4duBindMatrix("proj");
+  gl4duLoadIdentityf();
+  gl4duFrustumf(-ratio, ratio, -1, 1, 2, 100);
+
+  gl4duBindMatrix("modview");
+  gl4duLoadIdentityf();
+
+  gl4duTranslatef(0.f, d, -2.f);
+  glActiveTexture(GL_TEXTURE0);
+  glBindTexture(GL_TEXTURE_2D, _textTexId);
+  gl4duScalef(.5f, .1f, .5f);
+
+  glUseProgram(_pId);
+  gl4duSendMatrices();
+
+  glUniform1i(glGetUniformLocation(_pId, "inv"), 1);
+  glUniform1i(glGetUniformLocation(_pId, "tex"), 0);
+  gl4dgDraw(_quadId);
+
+  glUseProgram(0);
+}