void drawrect(int left, int top, int right, int bottom, GLrgba color)
{
float average;
float hue;
int potential;
int repeats;
int height;
int i, j;
bool bright;
GLrgba color_noise;
glDisable(GL_CULL_FACE);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND);
glLineWidth(1.0f);
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
glColor3fv(&color.red);
if (left == right)
{ //in low resolution, a "rect" might be 1 pixel wide
glBegin(GL_LINES);
glVertex2i(left, top);
glVertex2i(left, bottom);
glEnd();
}
if (top == bottom)
{ //in low resolution, a "rect" might be 1 pixel wide
glBegin(GL_LINES);
glVertex2i(left, top);
glVertex2i(right, top);
glEnd();
}
else
{ // draw one of those fancy 2-dimensional rectangles
glBegin(GL_QUADS);
glVertex2i(left, top);
glVertex2i(right, top);
glVertex2i(right, bottom);
glVertex2i(left, bottom);
glEnd();
average = (color.red + color.blue + color.green) / 3.0f;
bright = average > 0.5f;
potential = (int)(average * 255.0f);
if (bright)
{
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glBegin(GL_POINTS);
for (i = left + 1; i < right - 1; i++)
{
for (j = top + 1; j < bottom - 1; j++)
{
glColor4i(255, 0, RandomVal(potential), 255);
hue = 0.2f + (float)RandomVal(100) / 300.0f + (float)RandomVal(100) / 300.0f + (float)RandomVal(100) / 300.0f;
color_noise = glRgbaFromHsl(hue, 0.3f, 0.5f);
color_noise.alpha = (float)RandomVal(potential) / 144.0f;
glColor4f(RANDOM_COLOR_VAL, RANDOM_COLOR_VAL, RANDOM_COLOR_VAL, (float)RandomVal(potential) / 144.0f);
glColor4fv(&color_noise.red);
glVertex2i(i, j);
}
}
glEnd();
}
repeats = RandomVal(6) + 1;
height = (bottom - top) + (RandomVal(3) - 1) + (RandomVal(3) - 1);
for (i = left; i < right; i++)
{
if (RandomVal(3) == 0)
repeats = RandomVal(4) + 1;
if (RandomVal(6) == 0)
{
height = bottom - top;
height = RandomVal(height);
height = RandomVal(height);
height = RandomVal(height);
height = ((bottom - top) + height) / 2;
}
for (j = 0; j < 1; j++)
{
glBegin(GL_LINES);
glColor4f(0, 0, 0, (float)RandomVal(256) / 256.0f);
glVertex2i(i, bottom - height);
glColor4f(0, 0, 0, (float)RandomVal(256) / 256.0f);
glVertex2i(i, bottom);
glEnd();
}
}
}
}
static void do_effects (int type)
{
float hue1, hue2, hue3, hue4;
GLrgba color;
float fade;
int radius;
int x, y;
int i;
int bloom_radius;
int bloom_step;
fade = WorldFade ();
bloom_radius = 15;
bloom_step = bloom_radius / 3;
if (!TextureReady ())
return;
//Now change projection modes so we can render full-screen effects
glMatrixMode (GL_PROJECTION);
glPushMatrix ();
glLoadIdentity ();
glOrtho (0, render_width, render_height, 0, 0.1f, 2048);
glMatrixMode (GL_MODELVIEW);
glPushMatrix ();
glLoadIdentity();
glTranslatef(0, 0, -1.0f);
glDisable (GL_CULL_FACE);
glDisable (GL_FOG);
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
//Render full-screen effects
glBlendFunc (GL_ONE, GL_ONE);
glEnable (GL_TEXTURE_2D);
glDisable(GL_DEPTH_TEST);
glDepthMask (false);
glBindTexture(GL_TEXTURE_2D, TextureId (TEXTURE_BLOOM));
switch (type) {
case EFFECT_DEBUG:
glBindTexture(GL_TEXTURE_2D, TextureId (TEXTURE_LOGOS));
glDisable (GL_BLEND);
glBegin (GL_QUADS);
glColor3f (1, 1, 1);
glTexCoord2f (0, 0); glVertex2i (0, render_height / 4);
glTexCoord2f (0, 1); glVertex2i (0, 0);
glTexCoord2f (1, 1); glVertex2i (render_width / 4, 0);
glTexCoord2f (1, 0); glVertex2i (render_width / 4, render_height / 4);
glTexCoord2f (0, 0); glVertex2i (0, 512);
glTexCoord2f (0, 1); glVertex2i (0, 0);
glTexCoord2f (1, 1); glVertex2i (512, 0);
glTexCoord2f (1, 0); glVertex2i (512, 512);
glEnd ();
break;
case EFFECT_BLOOM_RADIAL:
//Psychedelic bloom
glEnable (GL_BLEND);
glBegin (GL_QUADS);
color = WorldBloomColor () * BLOOM_SCALING * 2;
glColor3fv (&color.red);
for (i = 0; i <= 100; i+=10) {
glTexCoord2f (0, 0); glVertex2i (-i, i + render_height);
glTexCoord2f (0, 1); glVertex2i (-i, -i);
glTexCoord2f (1, 1); glVertex2i (i + render_width, -i);
glTexCoord2f (1, 0); glVertex2i (i + render_width, i + render_height);
}
glEnd ();
break;
case EFFECT_COLOR_CYCLE:
//Oooh. Pretty colors. Tint the scene according to screenspace.
hue1 = (float)(GetTickCount () % COLOR_CYCLE_TIME) / COLOR_CYCLE_TIME;
hue2 = (float)((GetTickCount () + COLOR_CYCLE) % COLOR_CYCLE_TIME) / COLOR_CYCLE_TIME;
hue3 = (float)((GetTickCount () + COLOR_CYCLE * 2) % COLOR_CYCLE_TIME) / COLOR_CYCLE_TIME;
hue4 = (float)((GetTickCount () + COLOR_CYCLE * 3) % COLOR_CYCLE_TIME) / COLOR_CYCLE_TIME;
glBindTexture(GL_TEXTURE_2D, 0);
glEnable (GL_BLEND);
glBlendFunc (GL_ONE, GL_ONE);
glBlendFunc (GL_DST_COLOR, GL_SRC_COLOR);
glBegin (GL_QUADS);
color = glRgbaFromHsl (hue1, 1.0f, 0.6f);
glColor3fv (&color.red);
glTexCoord2f (0, 0); glVertex2i (0, render_height);
color = glRgbaFromHsl (hue2, 1.0f, 0.6f);
glColor3fv (&color.red);
glTexCoord2f (0, 1); glVertex2i (0, 0);
color = glRgbaFromHsl (hue3, 1.0f, 0.6f);
glColor3fv (&color.red);
glTexCoord2f (1, 1); glVertex2i (render_width, 0);
color = glRgbaFromHsl (hue4, 1.0f, 0.6f);
glColor3fv (&color.red);
glTexCoord2f (1, 0); glVertex2i (render_width, render_height);
glEnd ();
break;
case EFFECT_BLOOM:
//Simple bloom effect
glBegin (GL_QUADS);
color = WorldBloomColor () * BLOOM_SCALING;
glColor3fv (&color.red);
for (x = -bloom_radius; x <= bloom_radius; x += bloom_step) {
for (y = -bloom_radius; y <= bloom_radius; y += bloom_step) {
if (abs (x) == abs (y) && x)
continue;
glTexCoord2f (0, 0); glVertex2i (x, y + render_height);
glTexCoord2f (0, 1); glVertex2i (x, y);
glTexCoord2f (1, 1); glVertex2i (x + render_width, y);
glTexCoord2f (1, 0); glVertex2i (x + render_width, y + render_height);
}
}
glEnd ();
break;
case EFFECT_DEBUG_OVERBLOOM:
//This will punish that uppity GPU. Good for testing low frame rate behavior.
glBegin (GL_QUADS);
color = WorldBloomColor () * 0.01f;
glColor3fv (&color.red);
for (x = -50; x <= 50; x+=5) {
for (y = -50; y <= 50; y+=5) {
glTexCoord2f (0, 0); glVertex2i (x, y + render_height);
glTexCoord2f (0, 1); glVertex2i (x, y);
glTexCoord2f (1, 1); glVertex2i (x + render_width, y);
glTexCoord2f (1, 0); glVertex2i (x + render_width, y + render_height);
}
}
glEnd ();
break;
}
//Do the fade to / from darkness used to hide scene transitions
if (LOADING_SCREEN) {
if (fade > 0.0f) {
glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable (GL_BLEND);
glDisable (GL_TEXTURE_2D);
glColor4f (0, 0, 0, fade);
glBegin (GL_QUADS);
glVertex2i (0, 0);
glVertex2i (0, render_height);
glVertex2i (render_width, render_height);
glVertex2i (render_width, 0);
glEnd ();
}
if (TextureReady () && !EntityReady () && fade != 0.0f) {
radius = render_width / 16;
do_progress ((float)render_width / 2, (float)render_height / 2, (float)radius, fade, EntityProgress ());
RenderPrint (render_width / 2 - LOGO_PIXELS, render_height / 2 + LOGO_PIXELS, 0, glRgba (0.5f), "%1.2f%%", EntityProgress () * 100.0f);
RenderPrint (1, "%s v%d.%d.%03d", APP_TITLE, VERSION_MAJOR, VERSION_MINOR, VERSION_REVISION);
}
}
glPopMatrix ();
glMatrixMode (GL_PROJECTION);
glPopMatrix ();
glMatrixMode (GL_MODELVIEW);
glEnable(GL_DEPTH_TEST);
}
