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Add ecore_drm_fb file for framebuffer functions 

Signed-off-by: Chris Michael <cp.michael@samsung.com>
This commit is contained in:
Chris Michael 2014-01-02 08:00:00 +00:00
parent 0f0eb80fc5
commit 9584b01c03
1 changed files with 83 additions and 0 deletions
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83
src/lib/ecore_drm/ecore_drm_fb.c Normal file
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#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "ecore_drm_private.h"
Ecore_Drm_Fb *
_ecore_drm_fb_create(Ecore_Drm_Device *dev, int width, int height)
{
Ecore_Drm_Fb *fb;
struct drm_mode_create_dumb carg;
struct drm_mode_destroy_dumb darg;
struct drm_mode_map_dumb marg;
if (!(fb = calloc(1, sizeof(Ecore_Drm_Fb)))) return NULL;
memset(&carg, 0, sizeof(struct drm_mode_create_dumb));
carg.bpp = 32; // FIXME: Hard-coded depth
carg.width = width;
carg.height = height;
if (drmIoctl(dev->drm.fd, DRM_IOCTL_MODE_CREATE_DUMB, &carg))
{
ERR("Could not create dumb framebuffer: %m");
goto create_err;
}
fb->hdl = carg.handle;
fb->stride = carg.pitch;
fb->size = carg.size;
fb->fd = dev->drm.fd;
if (drmModeAddFB(dev->drm.fd, width, height, 24, 32,
fb->stride, fb->hdl, &fb->id))
{
ERR("Could not add framebuffer: %m");
goto add_err;
}
memset(&marg, 0, sizeof(struct drm_mode_map_dumb));
marg.handle = fb->hdl;
if (drmIoctl(dev->drm.fd, DRM_IOCTL_MODE_MAP_DUMB, &marg))
{
ERR("Could not map framebuffer: %m");
goto map_err;
}
fb->mmap =
mmap(0, fb->size, PROT_WRITE, MAP_SHARED, dev->drm.fd, marg.offset);
if (fb->mmap == MAP_FAILED)
{
ERR("Could not mmap framebuffer space: %m");
goto map_err;
}
return fb;
map_err:
drmModeRmFB(fb->fd, fb->id);
add_err:
memset(&darg, 0, sizeof(struct drm_mode_destroy_dumb));
darg.handle = fb->hdl;
drmIoctl(dev->drm.fd, DRM_IOCTL_MODE_DESTROY_DUMB, &darg);
create_err:
free(fb);
return NULL;
}
void
_ecore_drm_fb_destroy(Ecore_Drm_Fb *fb)
{
struct drm_mode_destroy_dumb darg;
if ((!fb) || (!fb->mmap)) return;
if (fb->id) drmModeRmFB(fb->fd, fb->id);
munmap(fb->mmap, fb->size);
memset(&darg, 0, sizeof(struct drm_mode_destroy_dumb));
darg.handle = fb->hdl;
drmIoctl(fb->fd, DRM_IOCTL_MODE_DESTROY_DUMB, &darg);
free(fb);
}