Commit cb47dc9a authored by Gerd Hoffmann's avatar Gerd Hoffmann
Browse files

sdl2/opengl: add opengl context and scanout support 



This allows virtio-gpu to render in 3d mode.

Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
Reviewed-by: default avatarMax Reitz <mreitz@redhat.com>
parent 4083733d

include/ui/sdl2.h

+21 −1
Original line number Diff line number Diff line
@@ -15,12 +15,18 @@ struct sdl2_console { 
    SDL_Renderer *real_renderer;

    int idx;

    int last_vm_running; /* per console for caption reasons */

    int x, y;

    int x, y, w, h;

    int hidden;

    int opengl;

    int updates;

    SDL_GLContext winctx;

#ifdef CONFIG_OPENGL

    ConsoleGLState *gls;

    GLuint tex_id;

    GLuint fbo_id;

    bool y0_top;

    bool scanout_mode;

#endif

};



void sdl2_window_create(struct sdl2_console *scon);
@@ -48,4 +54,18 @@ void sdl2_gl_switch(DisplayChangeListener *dcl, 
void sdl2_gl_refresh(DisplayChangeListener *dcl);

void sdl2_gl_redraw(struct sdl2_console *scon);



QEMUGLContext sdl2_gl_create_context(DisplayChangeListener *dcl,

                                     QEMUGLParams *params);

void sdl2_gl_destroy_context(DisplayChangeListener *dcl, QEMUGLContext ctx);

int sdl2_gl_make_context_current(DisplayChangeListener *dcl,

                                 QEMUGLContext ctx);

QEMUGLContext sdl2_gl_get_current_context(DisplayChangeListener *dcl);



void sdl2_gl_scanout(DisplayChangeListener *dcl,

                     uint32_t backing_id, bool backing_y_0_top,

                     uint32_t x, uint32_t y,

                     uint32_t w, uint32_t h);

void sdl2_gl_scanout_flush(DisplayChangeListener *dcl,

                           uint32_t x, uint32_t y, uint32_t w, uint32_t h);



#endif /* SDL2_H */

ui/sdl2-gl.c

+135 −0
Original line number Diff line number Diff line
@@ -31,11 +31,37 @@ 
#include "ui/sdl2.h"

#include "sysemu/sysemu.h"



#include <epoxy/gl.h>



static void sdl2_set_scanout_mode(struct sdl2_console *scon, bool scanout)

{

    if (scon->scanout_mode == scanout) {

        return;

    }



    scon->scanout_mode = scanout;

    if (!scon->scanout_mode) {

        if (scon->fbo_id) {

            glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,

                                      GL_COLOR_ATTACHMENT0_EXT,

                                      GL_TEXTURE_2D, 0, 0);

            glDeleteFramebuffers(1, &scon->fbo_id);

            glBindFramebuffer(GL_FRAMEBUFFER_EXT, 0);

            scon->fbo_id = 0;

        }

        if (scon->surface) {

            surface_gl_destroy_texture(scon->gls, scon->surface);

            surface_gl_create_texture(scon->gls, scon->surface);

        }

    }

}



static void sdl2_gl_render_surface(struct sdl2_console *scon)

{

    int ww, wh;



    SDL_GL_MakeCurrent(scon->real_window, scon->winctx);

    sdl2_set_scanout_mode(scon, false);



    SDL_GetWindowSize(scon->real_window, &ww, &wh);

    surface_gl_setup_viewport(scon->gls, scon->surface, ww, wh);
@@ -110,3 +136,112 @@ void sdl2_gl_redraw(struct sdl2_console *scon) 
        sdl2_gl_render_surface(scon);

    }

}



QEMUGLContext sdl2_gl_create_context(DisplayChangeListener *dcl,

                                     QEMUGLParams *params)

{

    struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);

    SDL_GLContext ctx;



    assert(scon->opengl);



    SDL_GL_MakeCurrent(scon->real_window, scon->winctx);



    SDL_GL_SetAttribute(SDL_GL_SHARE_WITH_CURRENT_CONTEXT, 1);

    SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK,

                        SDL_GL_CONTEXT_PROFILE_CORE);

    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, params->major_ver);

    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, params->minor_ver);



    ctx = SDL_GL_CreateContext(scon->real_window);

    return (QEMUGLContext)ctx;

}



void sdl2_gl_destroy_context(DisplayChangeListener *dcl, QEMUGLContext ctx)

{

    SDL_GLContext sdlctx = (SDL_GLContext)ctx;



    SDL_GL_DeleteContext(sdlctx);

}



int sdl2_gl_make_context_current(DisplayChangeListener *dcl,

                                 QEMUGLContext ctx)

{

    struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);

    SDL_GLContext sdlctx = (SDL_GLContext)ctx;



    assert(scon->opengl);



    return SDL_GL_MakeCurrent(scon->real_window, sdlctx);

}



QEMUGLContext sdl2_gl_get_current_context(DisplayChangeListener *dcl)

{

    SDL_GLContext sdlctx;



    sdlctx = SDL_GL_GetCurrentContext();

    return (QEMUGLContext)sdlctx;

}



void sdl2_gl_scanout(DisplayChangeListener *dcl,

                     uint32_t backing_id, bool backing_y_0_top,

                     uint32_t x, uint32_t y,

                     uint32_t w, uint32_t h)

{

    struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);



    assert(scon->opengl);

    scon->x = x;

    scon->y = y;

    scon->w = w;

    scon->h = h;

    scon->tex_id = backing_id;

    scon->y0_top = backing_y_0_top;



    SDL_GL_MakeCurrent(scon->real_window, scon->winctx);



    if (scon->tex_id == 0 || scon->w == 0 || scon->h == 0) {

        sdl2_set_scanout_mode(scon, false);

        return;

    }



    sdl2_set_scanout_mode(scon, true);

    if (!scon->fbo_id) {

        glGenFramebuffers(1, &scon->fbo_id);

    }



    glBindFramebuffer(GL_FRAMEBUFFER_EXT, scon->fbo_id);

    glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,

                              GL_TEXTURE_2D, scon->tex_id, 0);

}



void sdl2_gl_scanout_flush(DisplayChangeListener *dcl,

                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)

{

    struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);

    int ww, wh, y1, y2;



    assert(scon->opengl);

    if (!scon->scanout_mode) {

        return;

    }

    if (!scon->fbo_id) {

        return;

    }



    SDL_GL_MakeCurrent(scon->real_window, scon->winctx);



    glBindFramebuffer(GL_READ_FRAMEBUFFER, scon->fbo_id);

    glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);



    SDL_GetWindowSize(scon->real_window, &ww, &wh);

    glViewport(0, 0, ww, wh);

    y1 = scon->y0_top ? 0 : scon->h;

    y2 = scon->y0_top ? scon->h : 0;

    glBlitFramebuffer(0, y1, scon->w, y2,

                      0, 0, ww, wh,

                      GL_COLOR_BUFFER_BIT, GL_NEAREST);

    glBindFramebuffer(GL_FRAMEBUFFER_EXT, scon->fbo_id);



    SDL_GL_SwapWindow(scon->real_window);

}

ui/sdl2.c

+7 −0
Original line number Diff line number Diff line
@@ -700,6 +700,13 @@ static const DisplayChangeListenerOps dcl_gl_ops = { 
    .dpy_refresh             = sdl2_gl_refresh,

    .dpy_mouse_set           = sdl_mouse_warp,

    .dpy_cursor_define       = sdl_mouse_define,



    .dpy_gl_ctx_create       = sdl2_gl_create_context,

    .dpy_gl_ctx_destroy      = sdl2_gl_destroy_context,

    .dpy_gl_ctx_make_current = sdl2_gl_make_context_current,

    .dpy_gl_ctx_get_current  = sdl2_gl_get_current_context,

    .dpy_gl_scanout          = sdl2_gl_scanout,

    .dpy_gl_update           = sdl2_gl_scanout_flush,

};

#endif