/* 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));
}
