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test/sdl: handle resizing

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Issue #2583.
This commit is contained in:
Josef Söntgen 2017-11-17 13:07:19 +01:00 committed by Christian Helmuth
parent af1c965831
commit d57ebae6a0
1 changed files with 57 additions and 15 deletions
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72
repos/libports/src/test/sdl/main.cc
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@ -37,38 +37,80 @@
#include <base/printf.h>
#include <timer_session/connection.h>
static void draw(SDL_Surface * const screen, int w, int h)
{
if (screen == nullptr) { return; }
/* paint something into pixel buffer */
short* const pixels = (short* const) screen->pixels;
for (int i = 0; i < h; i++) {
for (int j = 0; j < w; j++) {
pixels[i*w+j] = (i/32)*32*64 + (j/32)*32 + i*j/1024;
}
}
SDL_UpdateRect(screen, 0, 0, 0, 0);
}
static SDL_Surface *set_video_mode(int w, int h)
{
SDL_Surface *screen = SDL_SetVideoMode(w, h, 16, SDL_SWSURFACE);
if (screen == nullptr) {
printf("Error: could not set video mode: %s\n", SDL_GetError());
}
return screen;
}
static SDL_Surface *resize_screen(SDL_Surface * const screen, int w, int h)
{
if (screen == nullptr) { return nullptr; }
int oldw = screen->w;
int oldh = screen->h;
SDL_Surface *nscreen = set_video_mode(w, h);
if (nscreen == nullptr) {
printf("Error: could not resize %dx%d -> %dx%d: %s\n",
oldw, oldh, w, h, SDL_GetError());
return nullptr;
}
return nscreen;
}
int main( int argc, char* args[] )
{
/* start SDL */
if (SDL_Init(SDL_INIT_VIDEO) == -1) {
printf("Error: could not initialize SDL: %s\n", SDL_GetError());
return 1;
}
/* set up the screen */
SDL_Surface *screen = SDL_SetVideoMode(0, 0, 16, SDL_SWSURFACE);
if(screen == nullptr) { return 1; }
int const scr_width = screen->w;
int const scr_height = screen->h;
/* paint something into pixel buffer */
short* const pixels = (short* const) screen->pixels;
for (int i = 0; i < scr_height; i++) {
for (int j = 0; j < scr_width; j++) {
pixels[i*scr_width+j] = (i/32)*32*64 + (j/32)*32 + i*j/1024;
}
}
SDL_UpdateRect(screen, 0, 0, 0, 0);
/* set screen to max WxH */
SDL_Surface *screen = set_video_mode(0, 0);
if (screen == nullptr) { return 1; }
bool done = false;
while (!done) {
draw(screen, screen->w, screen->h);
SDL_Delay(10);
SDL_Event event;
while (SDL_PollEvent(&event)) {
switch(event.type) {
case SDL_KEYDOWN:
printf( "%s\n", SDL_GetKeyName(event.key.keysym.sym));
done = true;
break;
case SDL_VIDEORESIZE:
screen = resize_screen(screen, event.resize.w, event.resize.h);
if (screen == nullptr) { done = true; }
break;
}
}