/* XXX support for separate read/draw buffers hasn't been tested */
static GLboolean gl_ggiSetBuffer(GLcontext *ctx, GLframebuffer *buffer, GLuint bufferBit)
{
ggi_mesa_context_t ggi_ctx = (ggi_mesa_context_t)ctx->DriverCtx;
printf("set read %d\n", bufferBit);
GGIMESADPRINT_CORE("gl_ggiSetBuffer() called\n");
if (bufferBit == DD_FRONT_LEFT_BIT)
{
ggiSetReadFrame(ggi_ctx->ggi_visual,
ggiGetDisplayFrame(ggi_ctx->ggi_visual));
ggiSetWriteFrame(ggi_ctx->ggi_visual,
ggiGetDisplayFrame(ggi_ctx->ggi_visual));
return GL_TRUE;
}
else if (bufferBit == DD_BACK_LEFT_BIT)
{
ggiSetReadFrame(ggi_ctx->ggi_visual,
ggiGetDisplayFrame(ggi_ctx->ggi_visual)?0 : 1);
ggiSetWriteFrame(ggi_ctx->ggi_visual,
ggiGetDisplayFrame(ggi_ctx->ggi_visual)?0 : 1);
return GL_TRUE;
}
else
return GL_FALSE;
}
static void animate(ggi_visual_t vis, ggi_mode * mode, int j)
{
int f, w, h;
ggi_pixel *buf;
ggi_color c1, c2;
c1.r = ((sin((double) j / 100) + 1) * 32768);
c1.g = ((sin(2.094394 + (double) j / 100) + 1) * 32768);
c1.b = ((sin(4.188789 + (double) j / 100) + 1) * 32768);
c1.a = 0;
c2.r = ((sin(3.141592 + (double) j / 100) + 1) * 32768);
c2.g = ((sin(5.235986 + (double) j / 100) + 1) * 32768);
c2.b = ((sin(7.330381 + (double) j / 100) + 1) * 32768);
c2.a = 0;
ggiSetGCForeground(vis, ggiMapColor(vis, &c1));
ggiSetGCBackground(vis, ggiMapColor(vis, &c2));
w = mode->virt.x / mode->frames;
h = mode->virt.y / 5;
buf = malloc(w * h * GT_SIZE(mode->graphtype));
if (buf == NULL)
return;
ggiSetOrigin(vis, j % (mode->virt.x - mode->visible.x + 1),
j % (mode->virt.y - mode->visible.y + 1));
for (f = 0; f < mode->frames; f++) {
int x, y, yspan;
x = f * w;
yspan = mode->virt.y - h;
y = (j + (yspan * 2 * (f / mode->frames))) % (2 * yspan);
y += yspan * 2 * f / mode->frames;
y %= yspan * 2;
if (y >= yspan)
y = yspan * 2 - y;
x += (int)(sin(3.14159264 * 4 * y / yspan) + 1) * (w * 1 / 10);
ggiSetWriteFrame(vis, f);
ggiSetReadFrame(vis, (f + 1) % mode->frames);
animate_one_frame(vis, x, y, w * 4 / 5, h, buf,
(x + w * (mode->frames - 1) + w / 2) %
mode->virt.x);
}
free(buf);
}
/*
* Swap front/back buffers for current context if double buffered.
*/
void ggiMesaSwapBuffers(void)
{
GLcontext *ctx;
ggi_mesa_context_t ggi_ctx;
ctx = _mesa_get_current_context();
ggi_ctx = (ggi_mesa_context_t)ctx->DriverCtx;
GGIMESADPRINT_CORE("ggiMesaSwapBuffers() called\n");
_mesa_notifySwapBuffers(ctx);
gl_ggiFlush(ctx);
ggiSetDisplayFrame(ggi_ctx->ggi_visual,
!ggiGetDisplayFrame(ggi_ctx->ggi_visual));
ggiSetWriteFrame(ggi_ctx->ggi_visual,
!ggiGetWriteFrame(ggi_ctx->ggi_visual));
ggiSetReadFrame(ggi_ctx->ggi_visual,
!ggiGetReadFrame(ggi_ctx->ggi_visual));
GGIMESADPRINT_CORE("swap disp: %d, write %d\n",
ggiGetDisplayFrame(ggi_ctx->ggi_visual),
ggiGetWriteFrame(ggi_ctx->ggi_visual));
}
int main(int argc, const char *argv[])
{
ggi_visual_t vis;
ggi_mode mode;
int i, j, cx, cy, c;
char buf[80];
/* Set up the random number generator */
srandom((unsigned)time(NULL));
/* Initialize LibGGI */
if (giiInit() < 0) {
fprintf(stderr, "Cannot initialize LibGII!\n");
return 1;
}
if (ggiInit() < 0) {
fprintf(stderr, "Cannot initialize LibGGI!\n");
giiExit();
return 1;
}
vis = ggNewStem(NULL);
if (!vis) {
fprintf(stderr, "Cannot open create stem!\n");
ggiExit();
giiExit();
return 1;
}
if (giiAttach(vis) < 0) {
fprintf(stderr, "Cannot attach LibGII!\n");
ggDelStem(vis);
ggiExit();
giiExit();
return 1;
}
if (ggiAttach(vis) < 0) {
fprintf(stderr, "Cannot attach LibGGI!\n");
ggDelStem(vis);
ggiExit();
giiExit();
return 1;
}
/* Open default visual */
if (ggiOpen(vis, NULL) < 0) {
fprintf(stderr, "Cannot open default visual!\n");
ggDelStem(vis);
ggiExit();
giiExit();
return 1;
}
/* Set visual to async mode (drawing not immediate) */
ggiSetFlags(vis, GGIFLAG_ASYNC);
/* Set default mode, but with multiple buffering */
if (argc > 1) {
ggiParseMode(argv[1], &mode);
} else {
ggiParseMode("", &mode);
if (mode.frames < 2) mode.frames = 2;
}
if (ggiSetMode(vis, &mode)) {
fprintf(stderr, "Cannot set mode!\n");
ggDelStem(vis);
ggiExit();
giiExit();
return 1;
}
ggiGetCharSize(vis, &cx, &cy);
/* Setup palette */
if (GT_SCHEME(mode.graphtype) == GT_PALETTE) {
ggiSetColorfulPalette(vis);
}
/* Write something into each frame */
for (i = 0; i < mode.frames; i++) {
if (ggiSetWriteFrame(vis, i)) {
fprintf(stderr, "Cannot set write frame!\n");
ggDelStem(vis);
ggiExit();
giiExit();
return 1;
}
ggiSetGCBackground(vis, ggiMapColor(vis, &white));
ggiSetGCForeground(vis, ggiMapColor(vis, &white));
ggiFillscreen(vis);
}
/* Clip a small border so that clipping can be verified. */
ggiSetGCClipping(vis, 5, 5, mode.virt.x - 5, mode.virt.y - 5);
/* Write something into each frame */
for (i = 0; i < mode.frames; i++) {
ggiSetWriteFrame(vis, i);
ggiSetGCBackground(vis, ggiMapColor(vis, &black));
ggiSetGCForeground(vis, ggiMapColor(vis, &black));
ggiFillscreen(vis);
snprintf(buf, sizeof(buf), "Hello World #%d!", i);
for (j = 0; j < mode.virt.y; j += cy) {
ggi_color col;
int x = random() % mode.virt.x;
int h = (random() & 0x7fff) + 0x8000;
int l = (random() & 0x7fff);
/* Use different colors for different frames */
col.r = ((i + 1) & 1) ? h : l;
col.g = ((i + 1) & 2) ? h : l;
col.b = ((i + 1) & 4) ? h : l;
ggiSetGCForeground(vis, ggiMapColor(vis, &col));
ggiPuts(vis, x, j, buf);
}
/* Flush commands before proceeding to the next frame */
ggiFlush(vis);
}
/* Cycle through frames */
i = 0;
j = 0;
do {
if (ggiSetDisplayFrame(vis, i)) {
ggPanic("Cannot set display frame!\n");
}
/* Wait */
c = GIIK_VOID;
do {
struct timeval tv = { 0, 0 };
int key;
/* Flush command before waiting for input */
ggiFlush(vis);
key = giiEventPoll(vis, emKeyPress, &tv);
if (key & emKeyPress)
c = giiGetc(vis);
ggUSleep(50000);
animate(vis, &mode, j);
j++;
} while (c == GIIK_VOID || GII_KTYP(c) == GII_KT_MOD);
i = (i + 1) % mode.frames;
} while (c != 'q' && c != 'Q' && c != 'x' && c != 'X' &&
c != GIIUC_Escape);
ggiClose(vis);
ggDelStem(vis);
ggiExit();
giiExit();
return 0;
}
