[qemu.git] / ui / sdl2-gl.c

/*
 * QEMU SDL display driver -- opengl support
 *
 * Copyright (c) 2014 Red Hat
 *
 * Authors:
 *     Gerd Hoffmann <[email protected]>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include "qemu/osdep.h"
#include "qemu-common.h"
#include "ui/console.h"
#include "ui/input.h"
#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);

    surface_gl_render_texture(scon->gls, scon->surface);
    SDL_GL_SwapWindow(scon->real_window);
}

void sdl2_gl_update(DisplayChangeListener *dcl,
                    int x, int y, int w, int h)
{
    struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);

    assert(scon->opengl);

    SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
    surface_gl_update_texture(scon->gls, scon->surface, x, y, w, h);
    scon->updates++;
}

void sdl2_gl_switch(DisplayChangeListener *dcl,
                    DisplaySurface *new_surface)
{
    struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
    DisplaySurface *old_surface = scon->surface;

    assert(scon->opengl);

    SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
    surface_gl_destroy_texture(scon->gls, scon->surface);

    scon->surface = new_surface;

    if (!new_surface) {
        console_gl_fini_context(scon->gls);
        scon->gls = NULL;
        sdl2_window_destroy(scon);
        return;
    }

    if (!scon->real_window) {
        sdl2_window_create(scon);
        scon->gls = console_gl_init_context();
    } else if (old_surface &&
               ((surface_width(old_surface)  != surface_width(new_surface)) ||
                (surface_height(old_surface) != surface_height(new_surface)))) {
        sdl2_window_resize(scon);
    }

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

void sdl2_gl_refresh(DisplayChangeListener *dcl)
{
    struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);

    assert(scon->opengl);

    graphic_hw_update(dcl->con);
    if (scon->updates && scon->surface) {
        scon->updates = 0;
        sdl2_gl_render_surface(scon);
    }
    sdl2_poll_events(scon);
}

void sdl2_gl_redraw(struct sdl2_console *scon)
{
    assert(scon->opengl);

    if (scon->surface) {
        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);
}
Commit	Line	Data
0b71a5d5 GH	1	/*
	2	* QEMU SDL display driver -- opengl support
	3	*
	4	* Copyright (c) 2014 Red Hat
	5	*
	6	* Authors:
	7	* Gerd Hoffmann <[email protected]>
	8	*
	9	* Permission is hereby granted, free of charge, to any person obtaining a copy
	10	* of this software and associated documentation files (the "Software"), to deal
	11	* in the Software without restriction, including without limitation the rights
	12	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	13	* copies of the Software, and to permit persons to whom the Software is
	14	* furnished to do so, subject to the following conditions:
	15	*
	16	* The above copyright notice and this permission notice shall be included in
	17	* all copies or substantial portions of the Software.
	18	*
	19	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	20	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	21	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	22	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	23	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	24	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	25	* THE SOFTWARE.
	26	*/
	27
e16f4c87	28	#include "qemu/osdep.h"
0b71a5d5 GH	29	#include "qemu-common.h"
	30	#include "ui/console.h"
	31	#include "ui/input.h"
	32	#include "ui/sdl2.h"
	33	#include "sysemu/sysemu.h"
	34
cb47dc9a GH	35	#include <epoxy/gl.h>
	36
	37	static void sdl2_set_scanout_mode(struct sdl2_console *scon, bool scanout)
	38	{
	39	if (scon->scanout_mode == scanout) {
	40	return;
	41	}
	42
	43	scon->scanout_mode = scanout;
	44	if (!scon->scanout_mode) {
	45	if (scon->fbo_id) {
	46	glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
	47	GL_COLOR_ATTACHMENT0_EXT,
	48	GL_TEXTURE_2D, 0, 0);
	49	glDeleteFramebuffers(1, &scon->fbo_id);
	50	glBindFramebuffer(GL_FRAMEBUFFER_EXT, 0);
	51	scon->fbo_id = 0;
	52	}
	53	if (scon->surface) {
	54	surface_gl_destroy_texture(scon->gls, scon->surface);
	55	surface_gl_create_texture(scon->gls, scon->surface);
	56	}
	57	}
	58	}
	59
0b71a5d5 GH	60	static void sdl2_gl_render_surface(struct sdl2_console *scon)
	61	{
	62	int ww, wh;
	63
	64	SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
cb47dc9a	65	sdl2_set_scanout_mode(scon, false);
0b71a5d5 GH	66
	67	SDL_GetWindowSize(scon->real_window, &ww, &wh);
	68	surface_gl_setup_viewport(scon->gls, scon->surface, ww, wh);
	69
	70	surface_gl_render_texture(scon->gls, scon->surface);
	71	SDL_GL_SwapWindow(scon->real_window);
	72	}
	73
	74	void sdl2_gl_update(DisplayChangeListener *dcl,
	75	int x, int y, int w, int h)
	76	{
	77	struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
	78
	79	assert(scon->opengl);
	80
	81	SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
	82	surface_gl_update_texture(scon->gls, scon->surface, x, y, w, h);
	83	scon->updates++;
	84	}
	85
	86	void sdl2_gl_switch(DisplayChangeListener *dcl,
	87	DisplaySurface *new_surface)
	88	{
	89	struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
	90	DisplaySurface *old_surface = scon->surface;
	91
	92	assert(scon->opengl);
	93
	94	SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
	95	surface_gl_destroy_texture(scon->gls, scon->surface);
	96
	97	scon->surface = new_surface;
	98
	99	if (!new_surface) {
	100	console_gl_fini_context(scon->gls);
	101	scon->gls = NULL;
	102	sdl2_window_destroy(scon);
	103	return;
	104	}
	105
	106	if (!scon->real_window) {
	107	sdl2_window_create(scon);
	108	scon->gls = console_gl_init_context();
	109	} else if (old_surface &&
	110	((surface_width(old_surface) != surface_width(new_surface)) \|\|
	111	(surface_height(old_surface) != surface_height(new_surface)))) {
	112	sdl2_window_resize(scon);
	113	}
	114
	115	surface_gl_create_texture(scon->gls, scon->surface);
	116	}
	117
	118	void sdl2_gl_refresh(DisplayChangeListener *dcl)
	119	{
	120	struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
	121
	122	assert(scon->opengl);
	123
	124	graphic_hw_update(dcl->con);
	125	if (scon->updates && scon->surface) {
	126	scon->updates = 0;
	127	sdl2_gl_render_surface(scon);
	128	}
	129	sdl2_poll_events(scon);
130	}
131
132	void sdl2_gl_redraw(struct sdl2_console *scon)
133	{
134	assert(scon->opengl);
135
136	if (scon->surface) {
137	sdl2_gl_render_surface(scon);
138	}
139	}
cb47dc9a GH	140
	141	QEMUGLContext sdl2_gl_create_context(DisplayChangeListener *dcl,
	142	QEMUGLParams *params)
	143	{
	144	struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
	145	SDL_GLContext ctx;
	146
	147	assert(scon->opengl);
	148
	149	SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
	150
	151	SDL_GL_SetAttribute(SDL_GL_SHARE_WITH_CURRENT_CONTEXT, 1);
	152	SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK,
	153	SDL_GL_CONTEXT_PROFILE_CORE);
	154	SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, params->major_ver);
	155	SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, params->minor_ver);
	156
	157	ctx = SDL_GL_CreateContext(scon->real_window);
	158	return (QEMUGLContext)ctx;
	159	}
	160
	161	void sdl2_gl_destroy_context(DisplayChangeListener *dcl, QEMUGLContext ctx)
	162	{
	163	SDL_GLContext sdlctx = (SDL_GLContext)ctx;
	164
	165	SDL_GL_DeleteContext(sdlctx);
	166	}
	167
	168	int sdl2_gl_make_context_current(DisplayChangeListener *dcl,
	169	QEMUGLContext ctx)
	170	{
	171	struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
	172	SDL_GLContext sdlctx = (SDL_GLContext)ctx;
	173
	174	assert(scon->opengl);
	175
	176	return SDL_GL_MakeCurrent(scon->real_window, sdlctx);
	177	}
	178
	179	QEMUGLContext sdl2_gl_get_current_context(DisplayChangeListener *dcl)
	180	{
	181	SDL_GLContext sdlctx;
	182
	183	sdlctx = SDL_GL_GetCurrentContext();
	184	return (QEMUGLContext)sdlctx;
	185	}
	186
	187	void sdl2_gl_scanout(DisplayChangeListener *dcl,
	188	uint32_t backing_id, bool backing_y_0_top,
	189	uint32_t x, uint32_t y,
	190	uint32_t w, uint32_t h)
	191	{
	192	struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
	193
	194	assert(scon->opengl);
	195	scon->x = x;
	196	scon->y = y;
	197	scon->w = w;
	198	scon->h = h;
	199	scon->tex_id = backing_id;
	200	scon->y0_top = backing_y_0_top;
	201
	202	SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
	203
204	if (scon->tex_id == 0 \|\| scon->w == 0 \|\| scon->h == 0) {
205	sdl2_set_scanout_mode(scon, false);
206	return;
207	}
208
209	sdl2_set_scanout_mode(scon, true);
210	if (!scon->fbo_id) {
211	glGenFramebuffers(1, &scon->fbo_id);
212	}
213
214	glBindFramebuffer(GL_FRAMEBUFFER_EXT, scon->fbo_id);
215	glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
216	GL_TEXTURE_2D, scon->tex_id, 0);
217	}
218
219	void sdl2_gl_scanout_flush(DisplayChangeListener *dcl,
220	uint32_t x, uint32_t y, uint32_t w, uint32_t h)
221	{
222	struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
223	int ww, wh, y1, y2;
224
225	assert(scon->opengl);
226	if (!scon->scanout_mode) {
227	return;
228	}
229	if (!scon->fbo_id) {
230	return;
231	}
232
233	SDL_GL_MakeCurrent(scon->real_window, scon->winctx);
234
235	glBindFramebuffer(GL_READ_FRAMEBUFFER, scon->fbo_id);
236	glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
237
238	SDL_GetWindowSize(scon->real_window, &ww, &wh);
239	glViewport(0, 0, ww, wh);
240	y1 = scon->y0_top ? 0 : scon->h;
241	y2 = scon->y0_top ? scon->h : 0;
242	glBlitFramebuffer(0, y1, scon->w, y2,
243	0, 0, ww, wh,
244	GL_COLOR_BUFFER_BIT, GL_NEAREST);
245	glBindFramebuffer(GL_FRAMEBUFFER_EXT, scon->fbo_id);
246
247	SDL_GL_SwapWindow(scon->real_window);
248	}