diff options
Diffstat (limited to 'ui/egl-headless.c')
| -rw-r--r-- | ui/egl-headless.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/ui/egl-headless.c b/ui/egl-headless.c new file mode 100644 index 0000000000..d8d800f8a6 --- /dev/null +++ b/ui/egl-headless.c @@ -0,0 +1,158 @@ +#include "qemu/osdep.h" +#include "qemu-common.h" +#include "sysemu/sysemu.h" +#include "ui/console.h" +#include "ui/egl-helpers.h" +#include "ui/egl-context.h" + +typedef struct egl_dpy { + DisplayChangeListener dcl; + DisplaySurface *ds; + int width, height; + GLuint texture; + GLuint framebuffer; + GLuint blit_texture; + GLuint blit_framebuffer; + bool y_0_top; +} egl_dpy; + +static void egl_refresh(DisplayChangeListener *dcl) +{ + graphic_hw_update(dcl->con); +} + +static void egl_gfx_update(DisplayChangeListener *dcl, + int x, int y, int w, int h) +{ +} + +static void egl_gfx_switch(DisplayChangeListener *dcl, + struct DisplaySurface *new_surface) +{ + egl_dpy *edpy = container_of(dcl, egl_dpy, dcl); + + edpy->ds = new_surface; +} + +static void egl_scanout_disable(DisplayChangeListener *dcl) +{ + egl_dpy *edpy = container_of(dcl, egl_dpy, dcl); + + edpy->texture = 0; + /* XXX: delete framebuffers here ??? */ +} + +static void egl_scanout_texture(DisplayChangeListener *dcl, + uint32_t backing_id, + bool backing_y_0_top, + uint32_t backing_width, + uint32_t backing_height, + uint32_t x, uint32_t y, + uint32_t w, uint32_t h) +{ + egl_dpy *edpy = container_of(dcl, egl_dpy, dcl); + + edpy->texture = backing_id; + edpy->y_0_top = backing_y_0_top; + + /* source framebuffer */ + if (!edpy->framebuffer) { + glGenFramebuffers(1, &edpy->framebuffer); + } + glBindFramebuffer(GL_FRAMEBUFFER_EXT, edpy->framebuffer); + glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, + GL_TEXTURE_2D, edpy->texture, 0); + + /* dest framebuffer */ + if (!edpy->blit_framebuffer) { + glGenFramebuffers(1, &edpy->blit_framebuffer); + glGenTextures(1, &edpy->blit_texture); + edpy->width = 0; + edpy->height = 0; + } + if (edpy->width != backing_width || edpy->height != backing_height) { + edpy->width = backing_width; + edpy->height = backing_height; + glBindTexture(GL_TEXTURE_2D, edpy->blit_texture); + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, + edpy->width, edpy->height, + 0, GL_BGRA, GL_UNSIGNED_BYTE, 0); + glBindFramebuffer(GL_FRAMEBUFFER_EXT, edpy->blit_framebuffer); + glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, + GL_TEXTURE_2D, edpy->blit_texture, 0); + } +} + +static void egl_scanout_flush(DisplayChangeListener *dcl, + uint32_t x, uint32_t y, + uint32_t w, uint32_t h) +{ + egl_dpy *edpy = container_of(dcl, egl_dpy, dcl); + GLuint y1, y2; + + if (!edpy->texture || !edpy->ds) { + return; + } + assert(surface_width(edpy->ds) == edpy->width); + assert(surface_height(edpy->ds) == edpy->height); + assert(surface_format(edpy->ds) == PIXMAN_x8r8g8b8); + + /* blit framebuffer, flip if needed */ + glBindFramebuffer(GL_READ_FRAMEBUFFER, edpy->framebuffer); + glBindFramebuffer(GL_DRAW_FRAMEBUFFER, edpy->blit_framebuffer); + glViewport(0, 0, edpy->width, edpy->height); + y1 = edpy->y_0_top ? edpy->height : 0; + y2 = edpy->y_0_top ? 0 : edpy->height; + glBlitFramebuffer(0, y1, edpy->width, y2, + 0, 0, edpy->width, edpy->height, + GL_COLOR_BUFFER_BIT, GL_NEAREST); + + /* read pixels to surface */ + glBindFramebuffer(GL_READ_FRAMEBUFFER, edpy->blit_framebuffer); + glReadBuffer(GL_COLOR_ATTACHMENT0_EXT); + glReadPixels(0, 0, edpy->width, edpy->height, + GL_BGRA, GL_UNSIGNED_BYTE, surface_data(edpy->ds)); + + /* notify about updates */ + dpy_gfx_update(edpy->dcl.con, x, y, w, h); +} + +static const DisplayChangeListenerOps egl_ops = { + .dpy_name = "egl-headless", + .dpy_refresh = egl_refresh, + .dpy_gfx_update = egl_gfx_update, + .dpy_gfx_switch = egl_gfx_switch, + + .dpy_gl_ctx_create = qemu_egl_create_context, + .dpy_gl_ctx_destroy = qemu_egl_destroy_context, + .dpy_gl_ctx_make_current = qemu_egl_make_context_current, + .dpy_gl_ctx_get_current = qemu_egl_get_current_context, + + .dpy_gl_scanout_disable = egl_scanout_disable, + .dpy_gl_scanout_texture = egl_scanout_texture, + .dpy_gl_update = egl_scanout_flush, +}; + +void egl_headless_init(void) +{ + QemuConsole *con; + egl_dpy *edpy; + int idx; + + if (egl_rendernode_init(NULL) < 0) { + error_report("egl: render node init failed"); + exit(1); + } + + for (idx = 0;; idx++) { + con = qemu_console_lookup_by_index(idx); + if (!con || !qemu_console_is_graphic(con)) { + break; + } + + edpy = g_new0(egl_dpy, 1); + edpy->dcl.con = con; + edpy->dcl.ops = &egl_ops; + register_displaychangelistener(&edpy->dcl); + } +} |