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sdl zoom

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This commit is contained in:
David Rose 2008-05-08 23:38:22 +00:00
parent 0b012b4789
commit 01a068a222
2 changed files with 45 additions and 9 deletions
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52
panda/src/tinydisplay/tinySDLGraphicsWindow.cxx
View File

@ -132,16 +132,31 @@ end_frame(FrameMode mode, Thread *current_thread) {
////////////////////////////////////////////////////////////////////
void TinySDLGraphicsWindow::
begin_flip() {
if (SDL_MUSTLOCK(_screen)) {
if (SDL_LockSurface(_screen) < 0) {
tinydisplay_cat.error()
<< "Can't lock screen: " << SDL_GetError() << "\n";
}
}
ZB_copyFrameBuffer(_frame_buffer, _screen->pixels, _pitch);
int fb_xsize = get_fb_x_size();
int fb_ysize = get_fb_y_size();
if (SDL_MUSTLOCK(_screen)) {
SDL_UnlockSurface(_screen);
if (fb_xsize == _frame_buffer->xsize) {
// No zooming is necessary--copy directly to the screen.
if (SDL_MUSTLOCK(_screen)) {
if (SDL_LockSurface(_screen) < 0) {
tinydisplay_cat.error()
<< "Can't lock screen: " << SDL_GetError() << "\n";
}
}
ZB_copyFrameBuffer(_frame_buffer, _screen->pixels, _pitch);
if (SDL_MUSTLOCK(_screen)) {
SDL_UnlockSurface(_screen);
}
} else {
// Copy to another surface, then scale it onto the screen.
SDL_Surface *temp =
SDL_CreateRGBSurfaceFrom(_frame_buffer->pbuf, _frame_buffer->xsize, _frame_buffer->ysize,
32, _frame_buffer->linesize, 0xff0000, 0x00ff00, 0x0000ff, 0xff000000);
SDL_SetAlpha(temp, SDL_RLEACCEL, 0);
SDL_BlitSurface(temp, NULL, _screen, NULL);
SDL_FreeSurface(temp);
}
SDL_Flip(_screen);
@ -248,6 +263,25 @@ set_properties_now(WindowProperties &properties) {
}
}
////////////////////////////////////////////////////////////////////
// Function: TinySDLGraphicsWindow::supports_pixel_zoom
// Access: Published, Virtual
// Description: Returns true if a call to set_pixel_zoom() will be
// respected, false if it will be ignored. If this
// returns false, then get_pixel_factor() will always
// return 1.0, regardless of what value you specify for
// set_pixel_zoom().
//
// This may return false if the underlying renderer
// doesn't support pixel zooming, or if you have called
// this on a DisplayRegion that doesn't have both
// set_clear_color() and set_clear_depth() enabled.
////////////////////////////////////////////////////////////////////
bool TinySDLGraphicsWindow::
supports_pixel_zoom() const {
return true;
}
////////////////////////////////////////////////////////////////////
// Function: TinySDLGraphicsWindow::close_window
// Access: Protected, Virtual

2
panda/src/tinydisplay/tinySDLGraphicsWindow.h
View File

@ -51,6 +51,8 @@ public:
virtual void process_events();
virtual void set_properties_now(WindowProperties &properties);
virtual bool supports_pixel_zoom() const;
protected:
virtual void close_window();
virtual bool open_window();