[Mesa-dev] [PATCH 4/9] Support of RENDER_TYPE property [4/7] Handling in glXCreateContext and init_fbconfig_for_chooser.

[Tomasz Lis]

glx: Handling RENDER_TYPE in glXCreateContext and init_fbconfig_for_chooser.

This patch sets the correct values of renderType
 in glXCreateContext and init_fbconfig_for_chooser routines.
---
 src/glx/glxcmds.c |   28 ++++++++++++++++++++++++----
 1 file changed, 24 insertions(+), 4 deletions(-)

diff --git a/src/glx/glxcmds.c b/src/glx/glxcmds.c
index 51b2237..aca55c0 100644
--- a/src/glx/glxcmds.c
+++ b/src/glx/glxcmds.c
@@ -373,7 +373,28 @@ glXCreateContext(Display * dpy, XVisualInfo * vis,
       return None;
    }
 
-   renderType = config->rgbMode ? GLX_RGBA_TYPE : GLX_COLOR_INDEX_TYPE;
+   /* Choose the context render type based on DRI config values.
+    * It is unusual to set this type from config, but we have no other choice,
+    * as this old API does not provide renderType parameter. */
+   if (config->renderType & GLX_RGBA_FLOAT_BIT_ARB) {
+       renderType = GLX_RGBA_FLOAT_TYPE_ARB;
+   } else if (config->renderType & GLX_RGBA_UNSIGNED_FLOAT_BIT_EXT) {
+       renderType = GLX_RGBA_UNSIGNED_FLOAT_TYPE_EXT;
+   } else if (config->renderType & GLX_RGBA_BIT) {
+       renderType = GLX_RGBA_TYPE;
+   } else if (config->renderType & GLX_COLOR_INDEX_BIT) {
+       renderType = GLX_COLOR_INDEX_TYPE;
+   } else if (config->rgbMode) {
+       /* If we're here, then renderType is not set correctly.
+        * Let's use a safeguard - any TrueColor or DirectColor mode is RGB mode. */
+        * Such default value is needed by old DRI drivers, which didn't set
+        * renderType correctly as the value was just ignored. */
+       renderType = GLX_RGBA_TYPE;
+   } else {
+       /* Safeguard - only one option left, all non-RGB modes are indexed modes.
+        * Again, this allows drivers with invalid renderType to work properly. */
+       renderType = GLX_COLOR_INDEX_TYPE;
+   }
 #endif
 
    return CreateContext(dpy, vis->visualid, config, shareList, allowDirect,
@@ -876,9 +897,8 @@ init_fbconfig_for_chooser(struct glx_config * config,
    config->transparentAlpha = GLX_DONT_CARE;
    config->transparentIndex = GLX_DONT_CARE;
 
-   config->drawableType = GLX_WINDOW_BIT;
-   config->renderType =
-      (config->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
+   /* Set GLX_RENDER_TYPE property to not expect any flags by default. */
+   config->renderType = 0;
    config->xRenderable = GLX_DONT_CARE;
    config->fbconfigID = (GLXFBConfigID) (GLX_DONT_CARE);
 
-- 
1.7.9.5