fdo-mirrors/cairo
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/cairo/cairo.git synced 2026-05-07 17:58:42 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

[gl] Avoid re-binding the same draw buffer.

Browse source 
The driver could be smarter and avoid a lot of the cost, but this is easy
and avoids needing much driver smarts.
This commit is contained in:
Eric Anholt 2009-02-09 15:42:09 -08:00
parent fb6937565b
commit df96fc1f92
1 changed files with 20 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

30
src/cairo-gl-surface.c
View file

@ -161,16 +161,22 @@ _cairo_gl_context_release (cairo_gl_context_t *ctx)
static void
_cairo_gl_set_destination (cairo_gl_surface_t *surface)
{
if (surface->fb) {
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, surface->fb);
glDrawBuffer (GL_COLOR_ATTACHMENT0_EXT);
glReadBuffer (GL_COLOR_ATTACHMENT0_EXT);
} else {
/* Set the window as the target of our context. */
glXMakeCurrent (surface->ctx->dpy, surface->win, surface->ctx->gl_ctx);
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, 0);
glDrawBuffer (GL_BACK_LEFT);
glReadBuffer (GL_BACK_LEFT);
cairo_gl_context_t *ctx = surface->ctx;
if (ctx->current_target != surface) {
ctx->current_target = surface;
if (surface->fb) {
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, surface->fb);
glDrawBuffer (GL_COLOR_ATTACHMENT0_EXT);
glReadBuffer (GL_COLOR_ATTACHMENT0_EXT);
} else {
/* Set the window as the target of our context. */
glXMakeCurrent (ctx->dpy, surface->win, ctx->gl_ctx);
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, 0);
glDrawBuffer (GL_BACK_LEFT);
glReadBuffer (GL_BACK_LEFT);
}
}
glViewport (0, 0, surface->width, surface->height);
@ -588,6 +594,10 @@ _cairo_gl_surface_finish (void *abstract_surface)
glDeleteFramebuffersEXT (1, &surface->fb);
glDeleteTextures (1, &surface->tex);
if (surface->ctx->current_target == surface)
surface->ctx->current_target = NULL;
cairo_gl_context_destroy(surface->ctx);
return CAIRO_STATUS_SUCCESS;