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egl-helpers: add dmabuf import support 

Add helper function to import a dma-buf as opengl texture.
Also add a helper to release the texture again.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20171010135453.6704-5-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2017-10-10 15:54:51 +02:00
parent 2e1d70b9e0
commit 86c0522c63
2 changed files with 49 additions and 0 deletions
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3
include/ui/egl-helpers.h
View File

@ -33,6 +33,9 @@ extern EGLContext qemu_egl_rn_ctx;
int egl_rendernode_init(const char *rendernode);
int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc);
void egl_dmabuf_import_texture(QemuDmaBuf *dmabuf);
void egl_dmabuf_release_texture(QemuDmaBuf *dmabuf);
#endif
EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, Window win);

46
ui/egl-helpers.c
View File

@ -19,6 +19,7 @@
#include <dirent.h>
#include "qemu/error-report.h"
#include "ui/console.h"
#include "ui/egl-helpers.h"
EGLDisplay *qemu_egl_display;
@ -241,6 +242,51 @@ int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc)
return fd;
}
void egl_dmabuf_import_texture(QemuDmaBuf *dmabuf)
{
EGLImageKHR image = EGL_NO_IMAGE_KHR;
EGLint attrs[] = {
EGL_DMA_BUF_PLANE0_FD_EXT, dmabuf->fd,
EGL_DMA_BUF_PLANE0_PITCH_EXT, dmabuf->stride,
EGL_DMA_BUF_PLANE0_OFFSET_EXT, 0,
EGL_WIDTH, dmabuf->width,
EGL_HEIGHT, dmabuf->height,
EGL_LINUX_DRM_FOURCC_EXT, dmabuf->fourcc,
EGL_NONE, /* end of list */
};
if (dmabuf->texture != 0) {
return;
}
image = eglCreateImageKHR(qemu_egl_display,
EGL_NO_CONTEXT,
EGL_LINUX_DMA_BUF_EXT,
NULL, attrs);
if (image == EGL_NO_IMAGE_KHR) {
error_report("eglCreateImageKHR failed");
return;
}
glGenTextures(1, &dmabuf->texture);
glBindTexture(GL_TEXTURE_2D, dmabuf->texture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, (GLeglImageOES)image);
eglDestroyImageKHR(qemu_egl_display, image);
}
void egl_dmabuf_release_texture(QemuDmaBuf *dmabuf)
{
if (dmabuf->texture == 0) {
return;
}
glDeleteTextures(1, &dmabuf->texture);
dmabuf->texture = 0;
}
#endif /* CONFIG_OPENGL_DMABUF */
/* ---------------------------------------------------------------------- */