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-rw-r--r--qemu/ui/egl-helpers.c148
1 files changed, 148 insertions, 0 deletions
diff --git a/qemu/ui/egl-helpers.c b/qemu/ui/egl-helpers.c
new file mode 100644
index 000000000..87d77afaa
--- /dev/null
+++ b/qemu/ui/egl-helpers.c
@@ -0,0 +1,148 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <glob.h>
+
+#include "ui/egl-helpers.h"
+
+EGLDisplay *qemu_egl_display;
+EGLConfig qemu_egl_config;
+
+/* ---------------------------------------------------------------------- */
+
+static bool egl_gles;
+static int egl_debug;
+
+#define egl_dbg(_x ...) \
+ do { \
+ if (egl_debug) { \
+ fprintf(stderr, "egl: " _x); \
+ } \
+ } while (0);
+
+/* ---------------------------------------------------------------------- */
+
+EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, Window win)
+{
+ EGLSurface esurface;
+ EGLBoolean b;
+
+ egl_dbg("eglCreateWindowSurface (x11 win id 0x%lx) ...\n",
+ (unsigned long) win);
+ esurface = eglCreateWindowSurface(qemu_egl_display,
+ qemu_egl_config,
+ (EGLNativeWindowType)win, NULL);
+ if (esurface == EGL_NO_SURFACE) {
+ fprintf(stderr, "egl: eglCreateWindowSurface failed\n");
+ return NULL;
+ }
+
+ b = eglMakeCurrent(qemu_egl_display, esurface, esurface, ectx);
+ if (b == EGL_FALSE) {
+ fprintf(stderr, "egl: eglMakeCurrent failed\n");
+ return NULL;
+ }
+
+ return esurface;
+}
+
+/* ---------------------------------------------------------------------- */
+
+int qemu_egl_init_dpy(EGLNativeDisplayType dpy, bool gles, bool debug)
+{
+ static const EGLint conf_att_gl[] = {
+ EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
+ EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
+ EGL_RED_SIZE, 5,
+ EGL_GREEN_SIZE, 5,
+ EGL_BLUE_SIZE, 5,
+ EGL_ALPHA_SIZE, 0,
+ EGL_NONE,
+ };
+ static const EGLint conf_att_gles[] = {
+ EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
+ EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
+ EGL_RED_SIZE, 5,
+ EGL_GREEN_SIZE, 5,
+ EGL_BLUE_SIZE, 5,
+ EGL_ALPHA_SIZE, 0,
+ EGL_NONE,
+ };
+ EGLint major, minor;
+ EGLBoolean b;
+ EGLint n;
+
+ if (debug) {
+ egl_debug = 1;
+ setenv("EGL_LOG_LEVEL", "debug", true);
+ setenv("LIBGL_DEBUG", "verbose", true);
+ }
+
+ egl_dbg("eglGetDisplay (dpy %p) ...\n", dpy);
+ qemu_egl_display = eglGetDisplay(dpy);
+ if (qemu_egl_display == EGL_NO_DISPLAY) {
+ fprintf(stderr, "egl: eglGetDisplay failed\n");
+ return -1;
+ }
+
+ egl_dbg("eglInitialize ...\n");
+ b = eglInitialize(qemu_egl_display, &major, &minor);
+ if (b == EGL_FALSE) {
+ fprintf(stderr, "egl: eglInitialize failed\n");
+ return -1;
+ }
+
+ egl_dbg("eglBindAPI ...\n");
+ b = eglBindAPI(gles ? EGL_OPENGL_ES_API : EGL_OPENGL_API);
+ if (b == EGL_FALSE) {
+ fprintf(stderr, "egl: eglBindAPI failed\n");
+ return -1;
+ }
+
+ egl_dbg("eglChooseConfig ...\n");
+ b = eglChooseConfig(qemu_egl_display,
+ gles ? conf_att_gles : conf_att_gl,
+ &qemu_egl_config, 1, &n);
+ if (b == EGL_FALSE || n != 1) {
+ fprintf(stderr, "egl: eglChooseConfig failed\n");
+ return -1;
+ }
+
+ egl_gles = gles;
+ return 0;
+}
+
+EGLContext qemu_egl_init_ctx(void)
+{
+ static const EGLint ctx_att_gl[] = {
+ EGL_NONE
+ };
+ static const EGLint ctx_att_gles[] = {
+ EGL_CONTEXT_CLIENT_VERSION, 2,
+ EGL_NONE
+ };
+
+ EGLContext ectx;
+ EGLBoolean b;
+
+ egl_dbg("eglCreateContext ...\n");
+ ectx = eglCreateContext(qemu_egl_display, qemu_egl_config, EGL_NO_CONTEXT,
+ egl_gles ? ctx_att_gles : ctx_att_gl);
+ if (ectx == EGL_NO_CONTEXT) {
+ fprintf(stderr, "egl: eglCreateContext failed\n");
+ return NULL;
+ }
+
+ b = eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, ectx);
+ if (b == EGL_FALSE) {
+ fprintf(stderr, "egl: eglMakeCurrent failed\n");
+ return NULL;
+ }
+
+ return ectx;
+}