/**
* @brief Starts the rendering engine.
*/
static void gl_fontRenderStart( const glFontStash* font, double x, double y, const glColour *c )
{
double a;
/* Enable textures. */
glEnable(GL_TEXTURE_2D);
/* Set up matrix. */
gl_matrixMode(GL_MODELVIEW);
gl_matrixPush();
gl_matrixTranslate( round(x), round(y) );
/* Handle colour. */
if (font_restoreLast) {
a = (c==NULL) ? 1. : c->a;
ACOLOUR(*font_lastCol,a);
}
else {
if (c==NULL)
glColor4d( 1., 1., 1., 1. );
else
COLOUR(*c);
}
font_restoreLast = 0;
/* Activate the appropriate VBOs. */
gl_vboActivateOffset( font->vbo_tex, GL_TEXTURE_COORD_ARRAY, 0, 2, GL_FLOAT, 0 );
gl_vboActivateOffset( font->vbo_vert, GL_VERTEX_ARRAY, 0, 2, GL_SHORT, 0 );
}
/**
* @brief Ends the rendering engine.
*/
static void gl_fontRenderEnd (void)
{
gl_vboDeactivate();
gl_matrixPop();
gl_matrixMode( GL_PROJECTION );
glDisable(GL_TEXTURE_2D);
/* Check for errors. */
gl_checkErr();
}
/**
* @brief Sets the opengl viewport.
*/
void gl_viewport( int x, int y, int w, int h )
{
gl_matrixMode(GL_PROJECTION);
gl_matrixIdentity();
gl_matrixOrtho( 0., /* Left edge. */
gl_screen.nw, /* Right edge. */
0., /* Bottom edge. */
gl_screen.nh, /* Top edge. */
-1., /* near */
1. ); /* far */
/* Take into account possible translation. */
gl_screen.x = x;
gl_screen.y = y;
gl_matrixTranslate( x, y );
/* Set screen size. */
gl_screen.w = w;
gl_screen.h = h;
/* Take into account possible scaling. */
if (gl_screen.scale != 1.)
gl_matrixScale( gl_screen.wscale, gl_screen.hscale );
}
