Hello, I am trying to implement a 3D engine from scratch with XCB. To do this, I have to set the color of every individual pixel before drawing it.
I noticed that calling xcb_alloc_color and xcb_alloc_color_reply are bottlenecking the program and making it slow to draw individual triangles. Below is how I am setting the color before drawing each pixel, straight from this tutorial <https://www.x.org/releases/X11R7.7/doc/libxcb/tutorial/index.html#usecolor> : void set_drawing_color(xcb_connection_t *c, xcb_colormap_t colormap, xcb_gcontext_t gcontext, int r, int g, int b) { xcb_alloc_color_reply_t *color_info; uint32_t mask; uint32_t value[3]; color_info = xcb_alloc_color_reply(c, xcb_alloc_color(c, colormap, r, g, b), NULL); if (!color_info) return 0; free(color_info); mask = XCB_GC_FOREGROUND; value[0] = color_info->pixel; xcb_change_gc(c, gcontext, mask, value);} Is this an appropriate way to set the color? Is there a more efficient way to do so? Slightly unrelated question: as someone completely new to Xorg and Linux graphics in general, how do you deal with the lack of documentation for XCB? Thanks, Mark
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