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-rw-r--r--subprojects/nk_pugl/pugl/pugl/detail/x11_gl.c216
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diff --git a/subprojects/nk_pugl/pugl/pugl/detail/x11_gl.c b/subprojects/nk_pugl/pugl/pugl/detail/x11_gl.c
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+++ b/subprojects/nk_pugl/pugl/pugl/detail/x11_gl.c
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+/*
+ Copyright 2012-2019 David Robillard <http://drobilla.net>
+
+ Permission to use, copy, modify, and/or distribute this software for any
+ purpose with or without fee is hereby granted, provided that the above
+ copyright notice and this permission notice appear in all copies.
+
+ THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+/**
+ @file x11_gl.c OpenGL graphics backend for X11.
+*/
+
+#include "pugl/detail/types.h"
+#include "pugl/detail/x11.h"
+#include "pugl/pugl.h"
+#include "pugl/pugl_gl.h"
+#include "pugl/pugl_stub.h"
+
+#include <GL/glx.h>
+#include <X11/X.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+typedef struct {
+ GLXFBConfig fb_config;
+ GLXContext ctx;
+ int double_buffered;
+} PuglX11GlSurface;
+
+static int
+puglX11GlHintValue(const int value)
+{
+ return value == PUGL_DONT_CARE ? (int)GLX_DONT_CARE : value;
+}
+
+static int
+puglX11GlGetAttrib(Display* const display,
+ GLXFBConfig fb_config,
+ const int attrib)
+{
+ int value = 0;
+ glXGetFBConfigAttrib(display, fb_config, attrib, &value);
+ return value;
+}
+
+static PuglStatus
+puglX11GlConfigure(PuglView* view)
+{
+ PuglInternals* const impl = view->impl;
+ const int screen = impl->screen;
+ Display* const display = impl->display;
+
+ PuglX11GlSurface* const surface =
+ (PuglX11GlSurface*)calloc(1, sizeof(PuglX11GlSurface));
+ impl->surface = surface;
+
+ const int attrs[] = {
+ GLX_X_RENDERABLE, True,
+ GLX_X_VISUAL_TYPE, GLX_TRUE_COLOR,
+ GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
+ GLX_RENDER_TYPE, GLX_RGBA_BIT,
+ GLX_SAMPLES, view->hints[PUGL_SAMPLES],
+ GLX_RED_SIZE, puglX11GlHintValue(view->hints[PUGL_RED_BITS]),
+ GLX_GREEN_SIZE, puglX11GlHintValue(view->hints[PUGL_GREEN_BITS]),
+ GLX_BLUE_SIZE, puglX11GlHintValue(view->hints[PUGL_BLUE_BITS]),
+ GLX_ALPHA_SIZE, puglX11GlHintValue(view->hints[PUGL_ALPHA_BITS]),
+ GLX_DEPTH_SIZE, puglX11GlHintValue(view->hints[PUGL_DEPTH_BITS]),
+ GLX_STENCIL_SIZE, puglX11GlHintValue(view->hints[PUGL_STENCIL_BITS]),
+ GLX_DOUBLEBUFFER, puglX11GlHintValue(view->hints[PUGL_DOUBLE_BUFFER]),
+ None
+ };
+
+ int n_fbc = 0;
+ GLXFBConfig* fbc = glXChooseFBConfig(display, screen, attrs, &n_fbc);
+ if (n_fbc <= 0) {
+ return PUGL_CREATE_CONTEXT_FAILED;
+ }
+
+ surface->fb_config = fbc[0];
+ impl->vi = glXGetVisualFromFBConfig(impl->display, fbc[0]);
+
+ char msg[128];
+
+ snprintf(
+ msg,
+ sizeof(msg),
+ "Using visual 0x%lX: R=%d G=%d B=%d A=%d D=%d DOUBLE=%d SAMPLES=%d\n",
+ impl->vi->visualid,
+ puglX11GlGetAttrib(display, fbc[0], GLX_RED_SIZE),
+ puglX11GlGetAttrib(display, fbc[0], GLX_GREEN_SIZE),
+ puglX11GlGetAttrib(display, fbc[0], GLX_BLUE_SIZE),
+ puglX11GlGetAttrib(display, fbc[0], GLX_ALPHA_SIZE),
+ puglX11GlGetAttrib(display, fbc[0], GLX_DEPTH_SIZE),
+ puglX11GlGetAttrib(display, fbc[0], GLX_DOUBLEBUFFER),
+ puglX11GlGetAttrib(display, fbc[0], GLX_SAMPLES));
+
+ view->world->logFunc(view->world, PUGL_LOG_LEVEL_INFO, msg);
+
+ XFree(fbc);
+
+ return PUGL_SUCCESS;
+}
+
+static PuglStatus
+puglX11GlCreate(PuglView* view)
+{
+ PuglInternals* const impl = view->impl;
+ PuglX11GlSurface* const surface = (PuglX11GlSurface*)impl->surface;
+ Display* const display = impl->display;
+ GLXFBConfig fb_config = surface->fb_config;
+
+ const int ctx_attrs[] = {
+ GLX_CONTEXT_MAJOR_VERSION_ARB, view->hints[PUGL_CONTEXT_VERSION_MAJOR],
+ GLX_CONTEXT_MINOR_VERSION_ARB, view->hints[PUGL_CONTEXT_VERSION_MINOR],
+ GLX_CONTEXT_FLAGS_ARB, (view->hints[PUGL_USE_DEBUG_CONTEXT]
+ ? GLX_CONTEXT_DEBUG_BIT_ARB
+ : 0),
+ GLX_CONTEXT_PROFILE_MASK_ARB, (view->hints[PUGL_USE_COMPAT_PROFILE]
+ ? GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB
+ : GLX_CONTEXT_CORE_PROFILE_BIT_ARB),
+ 0};
+
+ PFNGLXCREATECONTEXTATTRIBSARBPROC create_context =
+ (PFNGLXCREATECONTEXTATTRIBSARBPROC)glXGetProcAddress(
+ (const uint8_t*)"glXCreateContextAttribsARB");
+
+ PFNGLXSWAPINTERVALEXTPROC glXSwapIntervalEXT =
+ (PFNGLXSWAPINTERVALEXTPROC) glXGetProcAddress(
+ (const uint8_t*)"glXSwapIntervalEXT");
+
+ surface->ctx = create_context(display, fb_config, 0, True, ctx_attrs);
+ if (!surface->ctx) {
+ surface->ctx =
+ glXCreateNewContext(display, fb_config, GLX_RGBA_TYPE, 0, True);
+ }
+
+ if (!surface->ctx) {
+ return PUGL_CREATE_CONTEXT_FAILED;
+ }
+
+ const int swapInterval = view->hints[PUGL_SWAP_INTERVAL];
+ if (glXSwapIntervalEXT && swapInterval != PUGL_DONT_CARE) {
+ glXSwapIntervalEXT(display, impl->win, swapInterval);
+ }
+
+ glXGetConfig(impl->display,
+ impl->vi,
+ GLX_DOUBLEBUFFER,
+ &surface->double_buffered);
+
+ return PUGL_SUCCESS;
+}
+
+static PuglStatus
+puglX11GlDestroy(PuglView* view)
+{
+ PuglX11GlSurface* surface = (PuglX11GlSurface*)view->impl->surface;
+ if (surface) {
+ glXDestroyContext(view->impl->display, surface->ctx);
+ free(surface);
+ view->impl->surface = NULL;
+ }
+ return PUGL_SUCCESS;
+}
+
+static PuglStatus
+puglX11GlEnter(PuglView* view, const PuglEventExpose* PUGL_UNUSED(expose))
+{
+ PuglX11GlSurface* surface = (PuglX11GlSurface*)view->impl->surface;
+ glXMakeCurrent(view->impl->display, view->impl->win, surface->ctx);
+ return PUGL_SUCCESS;
+}
+
+static PuglStatus
+puglX11GlLeave(PuglView* view, const PuglEventExpose* expose)
+{
+ PuglX11GlSurface* surface = (PuglX11GlSurface*)view->impl->surface;
+
+ if (expose && surface->double_buffered) {
+ glXSwapBuffers(view->impl->display, view->impl->win);
+ }
+
+ glXMakeCurrent(view->impl->display, None, NULL);
+
+ return PUGL_SUCCESS;
+}
+
+PuglGlFunc
+puglGetProcAddress(const char* name)
+{
+ return glXGetProcAddress((const uint8_t*)name);
+}
+
+const PuglBackend* puglGlBackend(void)
+{
+ static const PuglBackend backend = {puglX11GlConfigure,
+ puglX11GlCreate,
+ puglX11GlDestroy,
+ puglX11GlEnter,
+ puglX11GlLeave,
+ puglStubGetContext};
+
+ return &backend;
+}