void RendererThread::Draw()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
DrawWallpaper();
DrawEngines();
DrawIcons();
}
void DemoState::AdvanceFrame(float delta_time) {
HandleInput();
UpdateIcons(delta_time);
audio_engine_.AdvanceFrame(delta_time);
RemoveInvalidSounds();
SDL_RenderClear(renderer_);
DrawInstructions();
DrawIcons();
SDL_RenderPresent(renderer_);
SDL_Delay(kDelayMilliseconds);
}
void golly_render::pixblit(int x, int y, int w, int h, char* pmdata, int pmscale)
{
// is Tom's hashdraw code doing unnecessary work???
if (x >= currwd || y >= currht) return;
if (x + w <= 0 || y + h <= 0) return;
// stride is the horizontal pixel width of the image data
int stride = w/pmscale;
// clip data outside viewport
if (pmscale > 1) {
// pmdata contains 1 byte per `pmscale' pixels, so we must be careful
// and adjust x, y, w and h by multiples of `pmscale' only
if (x < 0) {
int dx = -x/pmscale*pmscale;
pmdata += dx/pmscale;
w -= dx;
x += dx;
}
if (y < 0) {
int dy = -y/pmscale*pmscale;
pmdata += dy/pmscale*stride;
h -= dy;
y += dy;
}
if (x + w >= currwd + pmscale) w = (currwd - x + pmscale - 1)/pmscale*pmscale;
if (y + h >= currht + pmscale) h = (currht - y + pmscale - 1)/pmscale*pmscale;
}
int numstates = currlayer->algo->NumCellStates();
if (pmscale == 1) {
// draw rgb pixel data at scale 1:1
if (drawing_paste || numstates == 2) {
// we can't use DrawTexture to draw paste image because glTexImage2D clobbers
// any background pattern, so we use DrawPoints which is usually faster than
// DrawTexture in a sparsely populated universe with only 2 states (eg. Life)
DrawPoints((unsigned char*) pmdata, x, y, w, h);
} else {
DrawTexture((unsigned char*) pmdata, x, y, w, h);
}
} else if (showicons && pmscale > 4 && icontextures) {
// draw icons at scales 1:8 or above
DrawIcons((unsigned char*) pmdata, x, y, w/pmscale, h/pmscale, pmscale, stride);
} else {
// draw magnified cells, assuming pmdata contains (w/pmscale)*(h/pmscale) bytes
// where each byte contains a cell state
if (numstates == 2) {
DrawMagnifiedTwoStateCells((unsigned char*) pmdata, x, y, w/pmscale, h/pmscale, pmscale, stride);
} else {
DrawMagnifiedCells((unsigned char*) pmdata, x, y, w/pmscale, h/pmscale, pmscale, stride, numstates);
}
}
}
