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#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <assert.h>
#include <xf86drm.h>
#include "X11/Xlib.h"
#include "va.h"
#include "va_backend.h"
#include "va_dri2.h"
#include "va_dri2tokens.h"
#include "va_dricommon.h"
#define __DRI_BUFFER_FRONT_LEFT 0
#define __DRI_BUFFER_BACK_LEFT 1
#define __DRI_BUFFER_FRONT_RIGHT 2
#define __DRI_BUFFER_BACK_RIGHT 3
#define __DRI_BUFFER_DEPTH 4
#define __DRI_BUFFER_STENCIL 5
#define __DRI_BUFFER_ACCUM 6
#define __DRI_BUFFER_FAKE_FRONT_LEFT 7
#define __DRI_BUFFER_FAKE_FRONT_RIGHT 8
struct dri2_drawable
{
struct dri_drawable base;
union dri_buffer buffers[5];
int width;
int height;
int has_backbuffer;
int back_index;
int front_index;
};
static struct dri_drawable *
dri2CreateDrawable(VADriverContextP ctx, XID x_drawable)
{
struct dri2_drawable *dri2_drawable;
dri2_drawable = calloc(1, sizeof(*dri2_drawable));
if (!dri2_drawable)
return NULL;
dri2_drawable->base.x_drawable = x_drawable;
dri2_drawable->base.x = 0;
dri2_drawable->base.y = 0;
VA_DRI2CreateDrawable(ctx->x11_dpy, x_drawable);
return &dri2_drawable->base;
}
static void
dri2DestroyDrawable(VADriverContextP ctx, struct dri_drawable *dri_drawable)
{
VA_DRI2DestroyDrawable(ctx->x11_dpy, dri_drawable->x_drawable);
free(dri_drawable);
}
static void
dri2SwapBuffer(VADriverContextP ctx, struct dri_drawable *dri_drawable)
{
struct dri2_drawable *dri2_drawable = (struct dri2_drawable *)dri_drawable;
XRectangle xrect;
XserverRegion region;
if (dri2_drawable->has_backbuffer) {
xrect.x = 0;
xrect.y = 0;
xrect.width = dri2_drawable->width;
xrect.height = dri2_drawable->height;
region = XFixesCreateRegion(ctx->x11_dpy, &xrect, 1);
VA_DRI2CopyRegion(ctx->x11_dpy, dri_drawable->x_drawable, region,
DRI2BufferFrontLeft, DRI2BufferBackLeft);
XFixesDestroyRegion(ctx->x11_dpy, region);
}
}
static union dri_buffer *
dri2GetRenderingBuffer(VADriverContextP ctx, struct dri_drawable *dri_drawable)
{
struct dri2_drawable *dri2_drawable = (struct dri2_drawable *)dri_drawable;
int i;
int count;
unsigned int attachments[5];
VA_DRI2Buffer *buffers;
i = 0;
attachments[i++] = __DRI_BUFFER_BACK_LEFT;
attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
buffers = VA_DRI2GetBuffers(ctx->x11_dpy, dri_drawable->x_drawable,
&dri2_drawable->width, &dri2_drawable->height,
attachments, i, &count);
assert(buffers);
if (buffers == NULL)
return NULL;
dri2_drawable->has_backbuffer = 0;
for (i = 0; i < count; i++) {
dri2_drawable->buffers[i].dri2.attachment = buffers[i].attachment;
dri2_drawable->buffers[i].dri2.name = buffers[i].name;
dri2_drawable->buffers[i].dri2.pitch = buffers[i].pitch;
dri2_drawable->buffers[i].dri2.cpp = buffers[i].cpp;
dri2_drawable->buffers[i].dri2.flags = buffers[i].flags;
if (buffers[i].attachment == __DRI_BUFFER_BACK_LEFT) {
dri2_drawable->has_backbuffer = 1;
dri2_drawable->back_index = i;
}
if (buffers[i].attachment == __DRI_BUFFER_FRONT_LEFT)
dri2_drawable->front_index = i;
}
dri_drawable->width = dri2_drawable->width;
dri_drawable->height = dri2_drawable->height;
Xfree(buffers);
if (dri2_drawable->has_backbuffer)
return &dri2_drawable->buffers[dri2_drawable->back_index];
return &dri2_drawable->buffers[dri2_drawable->front_index];
}
static void
dri2Close(VADriverContextP ctx)
{
struct dri_state *dri_state = (struct dri_state *)ctx->dri_state;
free_drawable_hashtable(ctx);
assert(dri_state->fd >= 0);
close(dri_state->fd);
}
Bool
isDRI2Connected(VADriverContextP ctx, char **driver_name)
{
struct dri_state *dri_state = (struct dri_state *)ctx->dri_state;
int major, minor;
int error_base;
int event_base;
char *device_name = NULL;
drm_magic_t magic;
*driver_name = NULL;
dri_state->fd = -1;
dri_state->driConnectedFlag = VA_NONE;
if (!VA_DRI2QueryExtension(ctx->x11_dpy, &event_base, &error_base))
goto err_out;
if (!VA_DRI2QueryVersion(ctx->x11_dpy, &major, &minor))
goto err_out;
if (!VA_DRI2Connect(ctx->x11_dpy, RootWindow(ctx->x11_dpy, ctx->x11_screen),
driver_name, &device_name))
goto err_out;
dri_state->fd = open(device_name, O_RDWR);
assert(dri_state->fd >= 0);
if (dri_state->fd < 0)
goto err_out;
if (drmGetMagic(dri_state->fd, &magic))
goto err_out;
if (!VA_DRI2Authenticate(ctx->x11_dpy, RootWindow(ctx->x11_dpy, ctx->x11_screen),
magic))
goto err_out;
dri_state->driConnectedFlag = VA_DRI2;
dri_state->createDrawable = dri2CreateDrawable;
dri_state->destroyDrawable = dri2DestroyDrawable;
dri_state->swapBuffer = dri2SwapBuffer;
dri_state->getRenderingBuffer = dri2GetRenderingBuffer;
dri_state->close = dri2Close;
return True;
err_out:
if (device_name)
Xfree(device_name);
if (*driver_name)
Xfree(*driver_name);
if (dri_state->fd >= 0)
close(dri_state->fd);
*driver_name = NULL;
dri_state->fd = -1;
return False;
}
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