/** * \brief Query DRI2 to obtain a DRIdrawable's buffers. * * To determine which DRI buffers to request, examine the renderbuffers * attached to the drawable's framebuffer. Then request the buffers with * DRI2GetBuffers() or DRI2GetBuffersWithFormat(). * * This is called from intel_update_renderbuffers(). * * \param drawable Drawable whose buffers are queried. * \param buffers [out] List of buffers returned by DRI2 query. * \param buffer_count [out] Number of buffers returned. * * \see intel_update_renderbuffers() * \see DRI2GetBuffers() * \see DRI2GetBuffersWithFormat() */ static void intel_query_dri2_buffers(struct brw_context *brw, __DRIdrawable *drawable, __DRIbuffer **buffers, int *buffer_count) { __DRIscreen *screen = brw->intelScreen->driScrnPriv; struct gl_framebuffer *fb = drawable->driverPrivate; int i = 0; unsigned attachments[8]; struct intel_renderbuffer *front_rb; struct intel_renderbuffer *back_rb; front_rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT); back_rb = intel_get_renderbuffer(fb, BUFFER_BACK_LEFT); memset(attachments, 0, sizeof(attachments)); if ((brw_is_front_buffer_drawing(fb) || brw_is_front_buffer_reading(fb) || !back_rb) && front_rb) { /* If a fake front buffer is in use, then querying for * __DRI_BUFFER_FRONT_LEFT will cause the server to copy the image from * the real front buffer to the fake front buffer. So before doing the * query, we need to make sure all the pending drawing has landed in the * real front buffer. */ intel_batchbuffer_flush(brw); intel_flush_front(&brw->ctx); attachments[i++] = __DRI_BUFFER_FRONT_LEFT; attachments[i++] = intel_bits_per_pixel(front_rb); } else if (front_rb && brw->front_buffer_dirty) { /* We have pending front buffer rendering, but we aren't querying for a * front buffer. If the front buffer we have is a fake front buffer, * the X server is going to throw it away when it processes the query. * So before doing the query, make sure all the pending drawing has * landed in the real front buffer. */ intel_batchbuffer_flush(brw); intel_flush_front(&brw->ctx); } if (back_rb) { attachments[i++] = __DRI_BUFFER_BACK_LEFT; attachments[i++] = intel_bits_per_pixel(back_rb); } assert(i <= ARRAY_SIZE(attachments)); *buffers = screen->dri2.loader->getBuffersWithFormat(drawable, &drawable->w, &drawable->h, attachments, i / 2, buffer_count, drawable->loaderPrivate); }
static void intel_update_image_buffers(struct brw_context *brw, __DRIdrawable *drawable) { struct gl_framebuffer *fb = drawable->driverPrivate; __DRIscreen *screen = brw->intelScreen->driScrnPriv; struct intel_renderbuffer *front_rb; struct intel_renderbuffer *back_rb; struct __DRIimageList images; unsigned int format; uint32_t buffer_mask = 0; front_rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT); back_rb = intel_get_renderbuffer(fb, BUFFER_BACK_LEFT); if (back_rb) format = intel_rb_format(back_rb); else if (front_rb) format = intel_rb_format(front_rb); else return; if (front_rb && (brw_is_front_buffer_drawing(fb) || brw_is_front_buffer_reading(fb) || !back_rb)) { buffer_mask |= __DRI_IMAGE_BUFFER_FRONT; } if (back_rb) buffer_mask |= __DRI_IMAGE_BUFFER_BACK; (*screen->image.loader->getBuffers) (drawable, driGLFormatToImageFormat(format), &drawable->dri2.stamp, drawable->loaderPrivate, buffer_mask, &images); if (images.image_mask & __DRI_IMAGE_BUFFER_FRONT) { drawable->w = images.front->width; drawable->h = images.front->height; intel_update_image_buffer(brw, drawable, front_rb, images.front, __DRI_IMAGE_BUFFER_FRONT); } if (images.image_mask & __DRI_IMAGE_BUFFER_BACK) { drawable->w = images.back->width; drawable->h = images.back->height; intel_update_image_buffer(brw, drawable, back_rb, images.back, __DRI_IMAGE_BUFFER_BACK); } }
static void intelReadBuffer(struct gl_context * ctx, GLenum mode) { if (brw_is_front_buffer_reading(ctx->ReadBuffer)) { struct brw_context *const brw = brw_context(ctx); /* If we might be front-buffer reading on this buffer for the first * time, invalidate our DRI drawable so we'll ask for new buffers * (including the fake front) before we start reading again. */ dri2InvalidateDrawable(brw->driContext->driReadablePriv); } }