intel_swapbuffers.c

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/**************************************************************************
 *
 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 **************************************************************************/

#include "intel_device.h"
#include "intel_context.h"
#include "intel_batchbuffer.h"
#include "intel_reg.h"

#include "pipe/p_context.h"
#include "state_tracker/st_public.h"
#include "state_tracker/st_context.h"
#include "state_tracker/st_cb_fbo.h"
#include "intel_egl.h"


static void
intel_display_surface(struct egl_drm_drawable *draw,
                      struct pipe_surface *surf);

void intel_swap_buffers(struct egl_drm_drawable *draw)
{
        struct intel_framebuffer *intel_fb = (struct intel_framebuffer *)draw->priv;
        struct pipe_surface *back_surf;

        assert(intel_fb);
        assert(intel_fb->stfb);

        back_surf = st_get_framebuffer_surface(intel_fb->stfb, ST_SURFACE_BACK_LEFT);
        if (back_surf) {
                st_notify_swapbuffers(intel_fb->stfb);
                if (intel_fb->front)
                        intel_display_surface(draw, back_surf);
                st_notify_swapbuffers_complete(intel_fb->stfb);
        }
}

static void
intel_display_surface(struct egl_drm_drawable *draw,
                      struct pipe_surface *surf)
{
        struct intel_context *intel = NULL;
        struct intel_framebuffer *intel_fb = (struct intel_framebuffer *)draw->priv;
        struct _DriFenceObject *fence;

        //const int srcWidth = surf->width;
        //const int srcHeight = surf->height;

        intel = intel_fb->device->dummy;
        if (!intel) {
                printf("No dummy context\n");
                return;
        }

        const int dstWidth = intel_fb->front->width;
        const int dstHeight = intel_fb->front->height;
        const int dstPitch = intel_fb->front->pitch / 4;//draw->front.cpp;

        const int cpp = 4;//intel_fb->front->cpp;
        const int srcPitch = surf->stride / cpp;

        int BR13, CMD;
        //int i;

        BR13 = (dstPitch * cpp) | (0xCC << 16) | (1 << 24) | (1 << 25);
        CMD = (XY_SRC_COPY_BLT_CMD | XY_SRC_COPY_BLT_WRITE_ALPHA |
                        XY_SRC_COPY_BLT_WRITE_RGB);

        BEGIN_BATCH(8, 2);
        OUT_BATCH(CMD);
        OUT_BATCH(BR13);
        OUT_BATCH((0 << 16) | 0);
        OUT_BATCH((dstHeight << 16) | dstWidth);

        OUT_RELOC(intel_fb->front_buffer,
                DRM_BO_FLAG_MEM_TT | DRM_BO_FLAG_WRITE,
                DRM_BO_MASK_MEM | DRM_BO_FLAG_WRITE, 0);

        OUT_BATCH((0 << 16) | 0);
        OUT_BATCH((srcPitch * cpp) & 0xffff);
        OUT_RELOC(dri_bo(surf->buffer),
                        DRM_BO_FLAG_MEM_TT | DRM_BO_FLAG_READ,
                        DRM_BO_MASK_MEM | DRM_BO_FLAG_READ, 0);

        fence = intel_be_batchbuffer_flush(intel->base.batch);
        driFenceUnReference(&fence);
        intel_be_batchbuffer_finish(intel->base.batch);
}

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