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vo_gpu: d3d11: fix storage lifetime of compound literals

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Somehow I got the idea that compound literals had function-scoped
lifetime. Instead, like all other objects with automatic storage
duration, compound literals are block-scoped, so they become invalid
after exiting the block they were declared in. It seems like a recent
change to GCC actually reuses the memory that the compound literals
used to occupy, which was causing a few bugs.

The pattern of conditionally assigning a pointer to a compound literal
was used in a few places in ra_d3d11 where the Direct3D API expects
either a pointer to an initialised struct or NULL. Change these to
ensure the lifetime of the struct includes the API call.

Should fix #6775.
This commit is contained in:
James Ross-Gowan 2019-08-19 23:54:46 +10:00
parent cd7bcb9d0c
commit 80552ab28e
1 changed files with 15 additions and 8 deletions
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23
video/out/d3d11/ra_d3d11.c
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@ -386,14 +386,16 @@ static struct ra_tex *tex_create(struct ra *ra,
struct d3d_tex *tex_p = tex->priv = talloc_zero(tex, struct d3d_tex);
DXGI_FORMAT fmt = fmt_to_dxgi(params->format);
D3D11_SUBRESOURCE_DATA data;
D3D11_SUBRESOURCE_DATA *pdata = NULL;
if (params->initial_data) {
pdata = &(D3D11_SUBRESOURCE_DATA) {
data = (D3D11_SUBRESOURCE_DATA) {
.pSysMem = params->initial_data,
.SysMemPitch = params->w * params->format->pixel_size,
};
if (params->dimensions >= 3)
pdata->SysMemSlicePitch = pdata->SysMemPitch * params->h;
data.SysMemSlicePitch = data.SysMemPitch * params->h;
pdata = &data;
}
D3D11_USAGE usage = D3D11_USAGE_DEFAULT;
@ -645,7 +647,8 @@ static bool tex_upload(struct ra *ra, const struct ra_tex_upload_params *params)
ptrdiff_t stride = tex->params.dimensions >= 2 ? tex->params.w : 0;
ptrdiff_t pitch = tex->params.dimensions >= 3 ? stride * tex->params.h : 0;
bool invalidate = true;
D3D11_BOX *rc = NULL;
D3D11_BOX rc;
D3D11_BOX *prc = NULL;
if (tex->params.dimensions == 2) {
stride = params->stride;
@ -653,7 +656,7 @@ static bool tex_upload(struct ra *ra, const struct ra_tex_upload_params *params)
if (params->rc && (params->rc->x0 != 0 || params->rc->y0 != 0 ||
params->rc->x1 != tex->params.w || params->rc->y1 != tex->params.h))
{
rc = &(D3D11_BOX) {
rc = (D3D11_BOX) {
.left = params->rc->x0,
.top = params->rc->y0,
.front = 0,
@ -661,6 +664,7 @@ static bool tex_upload(struct ra *ra, const struct ra_tex_upload_params *params)
.bottom = params->rc->y1,
.back = 1,
};
prc = &rc;
invalidate = params->invalidate;
}
}
@ -668,11 +672,11 @@ static bool tex_upload(struct ra *ra, const struct ra_tex_upload_params *params)
int subresource = tex_p->array_slice >= 0 ? tex_p->array_slice : 0;
if (p->ctx1) {
ID3D11DeviceContext1_UpdateSubresource1(p->ctx1, tex_p->res,
subresource, rc, src, stride, pitch,
subresource, prc, src, stride, pitch,
invalidate ? D3D11_COPY_DISCARD : 0);
} else {
ID3D11DeviceContext_UpdateSubresource(p->ctx, tex_p->res, subresource,
rc, src, stride, pitch);
prc, src, stride, pitch);
}
return true;
@ -737,9 +741,12 @@ static struct ra_buf *buf_create(struct ra *ra,
struct d3d_buf *buf_p = buf->priv = talloc_zero(buf, struct d3d_buf);
D3D11_SUBRESOURCE_DATA data;
D3D11_SUBRESOURCE_DATA *pdata = NULL;
if (params->initial_data)
pdata = &(D3D11_SUBRESOURCE_DATA) { .pSysMem = params->initial_data };
if (params->initial_data) {
data = (D3D11_SUBRESOURCE_DATA) { .pSysMem = params->initial_data };
pdata = &data;
}
D3D11_BUFFER_DESC desc = { .ByteWidth = params->size };
switch (params->type) {