+ /* initialize visual */
+ {
+ struct gl_config *vis = &v->mesa_visual;
+
+ vis->rgbMode = GL_TRUE;
+ vis->doubleBufferMode = db_flag;
+ vis->stereoMode = stereo_flag;
+
+ vis->redBits = red_bits;
+ vis->greenBits = green_bits;
+ vis->blueBits = blue_bits;
+ vis->alphaBits = alpha_bits;
+ vis->rgbBits = red_bits + green_bits + blue_bits;
+
+ vis->indexBits = 0;
+ vis->depthBits = depth_size;
+ vis->stencilBits = stencil_size;
+
+ vis->accumRedBits = accum_red_size;
+ vis->accumGreenBits = accum_green_size;
+ vis->accumBlueBits = accum_blue_size;
+ vis->accumAlphaBits = accum_alpha_size;
+
+ vis->haveAccumBuffer = accum_red_size > 0;
+ vis->haveDepthBuffer = depth_size > 0;
+ vis->haveStencilBuffer = stencil_size > 0;
+
+ vis->numAuxBuffers = 0;
+ vis->level = 0;
+ vis->sampleBuffers = 0;
+ vis->samples = 0;
+ }
+
+ v->stvis.buffer_mask = ST_ATTACHMENT_FRONT_LEFT_MASK;
+ if (db_flag)
+ v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_LEFT_MASK;
+ if (stereo_flag) {
+ v->stvis.buffer_mask |= ST_ATTACHMENT_FRONT_RIGHT_MASK;
+ if (db_flag)
+ v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_RIGHT_MASK;
+ }
+
+ v->stvis.color_format = choose_pixel_format(v);
+ if (v->stvis.color_format == PIPE_FORMAT_NONE) {
+ FREE(v->visinfo);
+ FREE(v);
+ return NULL;
+ }
+
+ v->stvis.depth_stencil_format =
+ choose_depth_stencil_format(xmdpy, depth_size, stencil_size);
+
+ v->stvis.accum_format = (accum_red_size +
+ accum_green_size + accum_blue_size + accum_alpha_size) ?
+ PIPE_FORMAT_R16G16B16A16_SNORM : PIPE_FORMAT_NONE;
+
+ v->stvis.samples = num_samples;
+ v->stvis.render_buffer = ST_ATTACHMENT_INVALID;