diff options
Diffstat (limited to 'ui')
-rw-r--r-- | ui/egl-helpers.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/ui/egl-helpers.c b/ui/egl-helpers.c index 4a4d3370ee..bb19a5eeca 100644 --- a/ui/egl-helpers.c +++ b/ui/egl-helpers.c @@ -24,6 +24,82 @@ EGLDisplay *qemu_egl_display; EGLConfig qemu_egl_config; +/* ------------------------------------------------------------------ */ + +void egl_fb_destroy(egl_fb *fb) +{ + if (!fb->framebuffer) { + return; + } + + if (fb->delete_texture) { + glDeleteTextures(1, &fb->texture); + fb->delete_texture = false; + } + glDeleteFramebuffers(1, &fb->framebuffer); + + fb->width = 0; + fb->height = 0; + fb->texture = 0; + fb->framebuffer = 0; +} + +void egl_fb_setup_default(egl_fb *fb, int width, int height) +{ + fb->width = width; + fb->height = height; + fb->framebuffer = 0; /* default framebuffer */ +} + +void egl_fb_create_for_tex(egl_fb *fb, int width, int height, GLuint texture) +{ + fb->width = width; + fb->height = height; + fb->texture = texture; + if (!fb->framebuffer) { + glGenFramebuffers(1, &fb->framebuffer); + } + + glBindFramebuffer(GL_FRAMEBUFFER_EXT, fb->framebuffer); + glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, + GL_TEXTURE_2D, fb->texture, 0); +} + +void egl_fb_create_new_tex(egl_fb *fb, int width, int height) +{ + GLuint texture; + + glGenTextures(1, &texture); + glBindTexture(GL_TEXTURE_2D, texture); + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, + 0, GL_BGRA, GL_UNSIGNED_BYTE, 0); + + egl_fb_create_for_tex(fb, width, height, texture); + fb->delete_texture = true; +} + +void egl_fb_blit(egl_fb *dst, egl_fb *src, bool flip) +{ + GLuint y1, y2; + + glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer); + glBindFramebuffer(GL_DRAW_FRAMEBUFFER, dst->framebuffer); + glViewport(0, 0, dst->width, dst->height); + y1 = flip ? src->height : 0; + y2 = flip ? 0 : src->height; + glBlitFramebuffer(0, y1, src->width, y2, + 0, 0, dst->width, dst->height, + GL_COLOR_BUFFER_BIT, GL_LINEAR); +} + +void egl_fb_read(void *dst, egl_fb *src) +{ + glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer); + glReadBuffer(GL_COLOR_ATTACHMENT0_EXT); + glReadPixels(0, 0, src->width, src->height, + GL_BGRA, GL_UNSIGNED_BYTE, dst); +} + /* ---------------------------------------------------------------------- */ #ifdef CONFIG_OPENGL_DMABUF |