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-rw-r--r--src/VBox/GuestHost/OpenGL/spu_loader/choosevisual.c329
1 files changed, 329 insertions, 0 deletions
diff --git a/src/VBox/GuestHost/OpenGL/spu_loader/choosevisual.c b/src/VBox/GuestHost/OpenGL/spu_loader/choosevisual.c
new file mode 100644
index 00000000..1dc797e1
--- /dev/null
+++ b/src/VBox/GuestHost/OpenGL/spu_loader/choosevisual.c
@@ -0,0 +1,329 @@
+
+#include "chromium.h"
+#include "cr_spu.h"
+#include "cr_error.h"
+#include "cr_string.h"
+
+
+/**
+ * Wrappers for glXChooseVisual/etc.
+ *
+ * By using this function, the fake GLX, render SPU, tilesort SPU,
+ * etc can be assured of getting the same GLX visual for a set of CR_*_BIT
+ * visual flags. This helps ensure that render_to_app_window will work
+ * properly.
+ */
+
+
+#if defined(WINDOWS)
+int
+crChooseVisual(const crOpenGLInterface *ws, int visBits)
+{
+ /* placeholder */
+ return 0;
+}
+#endif
+
+
+#if defined(DARWIN)
+int
+crChooseVisual(const crOpenGLInterface *ws, int visBits)
+{
+ /* placeholder */
+ return 0;
+}
+#endif
+
+
+#if defined(GLX)
+
+XVisualInfo *
+crChooseVisual(const crOpenGLInterface *ws, Display *dpy, int screen,
+ GLboolean directColor, int visBits)
+{
+ XVisualInfo *vis;
+ int errorBase, eventBase;
+
+ if (ws->glXQueryExtension(dpy, &errorBase, &eventBase))
+ {
+
+ if (ws->glXChooseVisual)
+ {
+ /* Use the real OpenGL's glXChooseVisual function */
+ int attribList[100];
+ int i = 0;
+
+ /* Build the attribute list */
+ if (visBits & CR_RGB_BIT)
+ {
+ attribList[i++] = GLX_RGBA;
+ attribList[i++] = GLX_RED_SIZE;
+ attribList[i++] = 1;
+ attribList[i++] = GLX_GREEN_SIZE;
+ attribList[i++] = 1;
+ attribList[i++] = GLX_BLUE_SIZE;
+ attribList[i++] = 1;
+ }
+
+ if (visBits & CR_ALPHA_BIT)
+ {
+ attribList[i++] = GLX_ALPHA_SIZE;
+ attribList[i++] = 1;
+ }
+
+ if (visBits & CR_DOUBLE_BIT)
+ {
+ attribList[i++] = GLX_DOUBLEBUFFER;
+ }
+
+ if (visBits & CR_STEREO_BIT)
+ {
+ attribList[i++] = GLX_STEREO;
+ }
+
+ if (visBits & CR_DEPTH_BIT)
+ {
+ attribList[i++] = GLX_DEPTH_SIZE;
+ attribList[i++] = 1;
+ }
+
+ if (visBits & CR_STENCIL_BIT)
+ {
+ attribList[i++] = GLX_STENCIL_SIZE;
+ attribList[i++] = 1;
+ }
+
+ if (visBits & CR_ACCUM_BIT)
+ {
+ attribList[i++] = GLX_ACCUM_RED_SIZE;
+ attribList[i++] = 1;
+ attribList[i++] = GLX_ACCUM_GREEN_SIZE;
+ attribList[i++] = 1;
+ attribList[i++] = GLX_ACCUM_BLUE_SIZE;
+ attribList[i++] = 1;
+ if (visBits & CR_ALPHA_BIT)
+ {
+ attribList[i++] = GLX_ACCUM_ALPHA_SIZE;
+ attribList[i++] = 1;
+ }
+ }
+
+ if (visBits & CR_MULTISAMPLE_BIT)
+ {
+ attribList[i++] = GLX_SAMPLE_BUFFERS_SGIS;
+ attribList[i++] = 1;
+ attribList[i++] = GLX_SAMPLES_SGIS;
+ attribList[i++] = 4;
+ }
+
+ if (visBits & CR_OVERLAY_BIT)
+ {
+ attribList[i++] = GLX_LEVEL;
+ attribList[i++] = 1;
+ }
+
+ if (directColor)
+ {
+ /*
+ * See if we have have GLX_EXT_visual_info so we
+ * can grab a Direct Color visual
+ */
+#ifdef GLX_EXT_visual_info
+ if (crStrstr(ws->glXQueryExtensionsString(dpy, screen),
+ "GLX_EXT_visual_info"))
+ {
+ attribList[i++] = GLX_X_VISUAL_TYPE_EXT;
+ attribList[i++] = GLX_DIRECT_COLOR_EXT;
+ }
+#endif
+ }
+
+ /* End the list */
+ attribList[i++] = None;
+
+ vis = ws->glXChooseVisual(dpy, screen, attribList);
+ return vis;
+ }
+ else
+ {
+ /* Don't use glXChooseVisual, use glXGetConfig.
+ *
+ * Here's the deal:
+ * Some (all?) versions of the libGL.so that's shipped with ATI's
+ * drivers aren't built with the -Bsymbolic flag. That's bad.
+ *
+ * If we call the glXChooseVisual() function that's built into ATI's
+ * libGL, it in turn calls the glXGetConfig() function. Now, there's
+ * a glXGetConfig function in libGL.so **AND** there's a glXGetConfig
+ * function in Chromium's libcrfaker.so library. Unfortunately, the
+ * later one gets called instead of the former. At this point, things
+ * go haywire. If -Bsymbolic were used, this would not happen.
+ */
+ XVisualInfo templateVis;
+ long templateFlags;
+ int count, i, visType;
+
+ visType = directColor ? DirectColor : TrueColor;
+
+ /* Get list of candidate visuals */
+ templateFlags = VisualScreenMask | VisualClassMask;
+ templateVis.screen = screen;
+#if defined(__cplusplus) || defined(c_plusplus)
+ templateVis.c_class = visType;
+#else
+ templateVis.class = visType;
+#endif
+
+ vis = XGetVisualInfo(dpy, templateFlags, &templateVis, &count);
+ /* find first visual that's good enough */
+ for (i = 0; i < count; i++)
+ {
+ int val;
+
+ /* Need exact match on RGB, DOUBLEBUFFER, STEREO, LEVEL, MULTISAMPLE */
+ ws->glXGetConfig(dpy, vis + i, GLX_RGBA, &val);
+ if (((visBits & CR_RGB_BIT) && !val) ||
+ (((visBits & CR_RGB_BIT) == 0) && val))
+ {
+ continue;
+ }
+
+ ws->glXGetConfig(dpy, vis + i, GLX_DOUBLEBUFFER, &val);
+ if (((visBits & CR_DOUBLE_BIT) && !val) ||
+ (((visBits & CR_DOUBLE_BIT) == 0) && val))
+ {
+ continue;
+ }
+
+ ws->glXGetConfig(dpy, vis + i, GLX_STEREO, &val);
+ if (((visBits & CR_STEREO_BIT) && !val) ||
+ (((visBits & CR_STEREO_BIT) == 0) && val))
+ {
+ continue;
+ }
+
+ ws->glXGetConfig(dpy, vis + i, GLX_LEVEL, &val);
+ if (((visBits & CR_OVERLAY_BIT) && !val) ||
+ (((visBits & CR_OVERLAY_BIT) == 0) && val))
+ {
+ continue;
+ }
+
+ ws->glXGetConfig(dpy, vis + i, GLX_SAMPLE_BUFFERS_SGIS, &val);
+ if (visBits & CR_MULTISAMPLE_BIT)
+ {
+ if (!val)
+ continue;
+ ws->glXGetConfig(dpy, vis + i, GLX_SAMPLES_SGIS, &val);
+ if (val < 4)
+ continue;
+ }
+ else {
+ /* don't want multisample */
+ if (val)
+ continue;
+ }
+
+ /* Need good enough for ALPHA, DEPTH, STENCIL, ACCUM */
+ if (visBits & CR_ALPHA_BIT)
+ {
+ ws->glXGetConfig(dpy, vis + i, GLX_ALPHA_SIZE, &val);
+ if (!val)
+ continue;
+ }
+
+ if (visBits & CR_DEPTH_BIT)
+ {
+ ws->glXGetConfig(dpy, vis + i, GLX_DEPTH_SIZE, &val);
+ if (!val)
+ continue;
+ }
+
+ if (visBits & CR_STENCIL_BIT)
+ {
+ ws->glXGetConfig(dpy, vis + i, GLX_STENCIL_SIZE, &val);
+ if (!val)
+ continue;
+ }
+
+ if (visBits & CR_ACCUM_BIT)
+ {
+ ws->glXGetConfig(dpy, vis + i, GLX_ACCUM_RED_SIZE, &val);
+ if (!val)
+ continue;
+ if (visBits & CR_ALPHA_BIT)
+ {
+ ws->glXGetConfig(dpy, vis + i, GLX_ACCUM_ALPHA_SIZE, &val);
+ if (!val)
+ continue;
+ }
+ }
+
+ /* If we get here, we found a good visual.
+ * Now, we need to get a new XVisualInfo pointer in case the caller
+ * calls XFree on it.
+ */
+ templateFlags = VisualScreenMask | VisualIDMask;
+ templateVis.screen = screen;
+ templateVis.visualid = vis[i].visual->visualid;
+ XFree(vis); /* free the list */
+ vis = XGetVisualInfo(dpy, templateFlags, &templateVis, &count);
+ return vis;
+ }
+
+ /* if we get here, we failed to find a sufficient visual */
+ return NULL;
+ }
+ }
+ else
+ {
+ /* use Xlib instead of GLX */
+ XVisualInfo templateVis, *best;
+ long templateFlags;
+ int i, count, visType;
+
+ if (visBits & CR_RGB_BIT)
+ visType = directColor ? DirectColor : TrueColor;
+ else
+ visType = PseudoColor;
+
+ /* Get list of candidate visuals */
+ templateFlags = VisualScreenMask | VisualClassMask;
+ templateVis.screen = screen;
+#if defined(__cplusplus) || defined(c_plusplus)
+ templateVis.c_class = visType;
+#else
+ templateVis.class = visType;
+#endif
+
+ vis = XGetVisualInfo(dpy, templateFlags, &templateVis, &count);
+ if (!vis)
+ return NULL;
+
+ /* okay, select the RGB visual with the most depth */
+ best = vis + 0;
+ for (i = 1; i < count; i++)
+ {
+ if (vis[i].depth > best->depth &&
+ vis[i].bits_per_rgb > best->bits_per_rgb )
+ best = vis + i;
+ }
+
+ if (best)
+ {
+ /* If we get here, we found a good visual.
+ * Now, we need to get a new XVisualInfo pointer in case the caller
+ * calls XFree on it.
+ */
+ templateFlags = VisualScreenMask | VisualIDMask;
+ templateVis.screen = screen;
+ templateVis.visualid = best->visualid;
+ XFree(vis); /* free the list */
+ best = XGetVisualInfo(dpy, templateFlags, &templateVis, &count);
+ }
+
+ return best;
+ }
+}
+
+#endif /* GLX */
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