7ced9e9f6d
Add helper functions to initialize OpenGL using egl. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
149 lines
4.0 KiB
C
149 lines
4.0 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <glob.h>
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#include "ui/egl-helpers.h"
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EGLDisplay *qemu_egl_display;
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EGLConfig qemu_egl_config;
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/* ---------------------------------------------------------------------- */
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static bool egl_gles;
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static int egl_debug;
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#define egl_dbg(_x ...) \
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do { \
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if (egl_debug) { \
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fprintf(stderr, "egl: " _x); \
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} \
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} while (0);
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/* ---------------------------------------------------------------------- */
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EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, Window win)
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{
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EGLSurface esurface;
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EGLBoolean b;
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egl_dbg("eglCreateWindowSurface (x11 win id 0x%lx) ...\n",
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(unsigned long) win);
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esurface = eglCreateWindowSurface(qemu_egl_display,
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qemu_egl_config,
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(EGLNativeWindowType)win, NULL);
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if (esurface == EGL_NO_SURFACE) {
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fprintf(stderr, "egl: eglCreateWindowSurface failed\n");
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return NULL;
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}
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b = eglMakeCurrent(qemu_egl_display, esurface, esurface, ectx);
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if (b == EGL_FALSE) {
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fprintf(stderr, "egl: eglMakeCurrent failed\n");
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return NULL;
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}
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return esurface;
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}
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/* ---------------------------------------------------------------------- */
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int qemu_egl_init_dpy(EGLNativeDisplayType dpy, bool gles, bool debug)
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{
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static const EGLint conf_att_gl[] = {
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EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
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EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
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EGL_RED_SIZE, 5,
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EGL_GREEN_SIZE, 5,
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EGL_BLUE_SIZE, 5,
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EGL_ALPHA_SIZE, 0,
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EGL_NONE,
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};
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static const EGLint conf_att_gles[] = {
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EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
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EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
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EGL_RED_SIZE, 5,
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EGL_GREEN_SIZE, 5,
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EGL_BLUE_SIZE, 5,
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EGL_ALPHA_SIZE, 0,
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EGL_NONE,
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};
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EGLint major, minor;
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EGLBoolean b;
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EGLint n;
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if (debug) {
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egl_debug = 1;
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setenv("EGL_LOG_LEVEL", "debug", true);
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setenv("LIBGL_DEBUG", "verbose", true);
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}
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egl_dbg("eglGetDisplay (dpy %p) ...\n", dpy);
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qemu_egl_display = eglGetDisplay(dpy);
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if (qemu_egl_display == EGL_NO_DISPLAY) {
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fprintf(stderr, "egl: eglGetDisplay failed\n");
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return -1;
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}
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egl_dbg("eglInitialize ...\n");
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b = eglInitialize(qemu_egl_display, &major, &minor);
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if (b == EGL_FALSE) {
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fprintf(stderr, "egl: eglInitialize failed\n");
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return -1;
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}
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egl_dbg("eglBindAPI ...\n");
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b = eglBindAPI(gles ? EGL_OPENGL_ES_API : EGL_OPENGL_API);
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if (b == EGL_FALSE) {
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fprintf(stderr, "egl: eglBindAPI failed\n");
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return -1;
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}
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egl_dbg("eglChooseConfig ...\n");
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b = eglChooseConfig(qemu_egl_display,
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gles ? conf_att_gles : conf_att_gl,
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&qemu_egl_config, 1, &n);
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if (b == EGL_FALSE || n != 1) {
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fprintf(stderr, "egl: eglChooseConfig failed\n");
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return -1;
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}
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egl_gles = gles;
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return 0;
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}
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EGLContext qemu_egl_init_ctx(void)
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{
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static const EGLint ctx_att_gl[] = {
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EGL_NONE
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};
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static const EGLint ctx_att_gles[] = {
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EGL_CONTEXT_CLIENT_VERSION, 2,
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EGL_NONE
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};
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EGLContext ectx;
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EGLBoolean b;
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egl_dbg("eglCreateContext ...\n");
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ectx = eglCreateContext(qemu_egl_display, qemu_egl_config, EGL_NO_CONTEXT,
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egl_gles ? ctx_att_gles : ctx_att_gl);
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if (ectx == EGL_NO_CONTEXT) {
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fprintf(stderr, "egl: eglCreateContext failed\n");
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return NULL;
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}
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b = eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, ectx);
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if (b == EGL_FALSE) {
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fprintf(stderr, "egl: eglMakeCurrent failed\n");
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return NULL;
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}
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return ectx;
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}
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