[egl] alert: fix fuzzy font bug and make alerts a little more plesant

VERSION

@@ -1 +1 @@
-a12-223-g1492196bbf+1
+a12-224-gee5d6c7c3e+1

client/renderers/EGL/alert.c

@@ -49,6 +49,7 @@ struct EGL_Alert
 
   bool     ready;
   float    width  , height  ;
+  float    bgWidth, bgHeight;
   float    r, g, b, a;
 
   // uniforms
@@ -179,8 +180,13 @@ void egl_alert_render(EGL_Alert * alert, const float scaleX, const float scaleY)
 
     egl_texture_update(alert->texture, alert->bmp->pixels);
 
-    alert->width  = alert->bmp->width;
-    alert->height = alert->bmp->height;
+    alert->width  = alert->bgWidth  = alert->bmp->width;
+    alert->height = alert->bgHeight = alert->bmp->height;
+
+    if (alert->bgWidth < 200)
+      alert->bgWidth = 200;
+    alert->bgHeight += 4;
+
     alert->ready  = true;
 
     alert->font->release(alert->fontObj, alert->bmp);
@@ -198,14 +204,14 @@ void egl_alert_render(EGL_Alert * alert, const float scaleX, const float scaleY)
   // render the background first
   egl_shader_use(alert->shaderBG);
   glUniform2f(alert->uScreenBG, scaleX        , scaleY         );
-  glUniform2f(alert->uSizeBG  , alert->width, alert->height);
+  glUniform2i(alert->uSizeBG  , alert->bgWidth, alert->bgHeight);
   glUniform4f(alert->uColorBG , alert->r, alert->g, alert->b, alert->a);
   egl_model_render(alert->model);
 
   // render the texture over the background
   egl_shader_use(alert->shader);
   glUniform2f(alert->uScreen, scaleX      , scaleY       );
-  glUniform2f(alert->uSize  , alert->width, alert->height);
+  glUniform2i(alert->uSize  , alert->width, alert->height);
   egl_model_render(alert->model);
 
   glDisable(GL_BLEND);

client/renderers/EGL/egl.c

@@ -156,7 +156,7 @@ bool egl_create(void ** opaque, const LG_RendererParams params)
   this->screenScaleY = 1.0f;
 
   this->font = LG_Fonts[0];
-  if (!this->font->create(&this->fontObj, NULL, 14))
+  if (!this->font->create(&this->fontObj, NULL, 16))
   {
     DEBUG_ERROR("Failed to create a font instance");
     return false;

client/renderers/EGL/shader/alert.frag

@@ -1,11 +1,12 @@
 #version 300 es
 
 in  highp vec2 uv;
+in  highp vec2 sz;
 out highp vec4 color;
 
 uniform sampler2D sampler1;
 
 void main()
 {
-  color = texture(sampler1, uv);
+  color = texelFetch(sampler1, ivec2(uv * sz), 0);
 }

client/renderers/EGL/shader/alert.vert

@@ -4,17 +4,20 @@ layout(location = 0) in vec3 vertexPosition_modelspace;
 layout(location = 1) in vec2 vertexUV;
 
 uniform vec2  screen;
-uniform vec2 size;
+uniform ivec2 size;
 uniform vec4  color;
 
 out highp vec2 uv;
+out highp vec2 sz;
 out highp vec4 c;
 
 void main()
 {
+  sz = vec2(size) + 0.5;
+
   gl_Position.xyz = vertexPosition_modelspace;
   gl_Position.w   = 1.0;
-  gl_Position.xy *= screen.xy * size.xy;
+  gl_Position.xy *= screen.xy * sz;
 
   uv = vertexUV;
   c  = color;