RetroArch/gfx/sdl_gfx.c
2014-08-28 13:31:57 -03:00

514 lines
13 KiB
C

/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
*
* RetroArch is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include "SDL.h"
#include "../driver.h"
#include <stdlib.h>
#include <string.h>
#include "../general.h"
#include "scaler/scaler.h"
#include "gfx_common.h"
#include "gfx_context.h"
#include "fonts/fonts.h"
#ifdef HAVE_X11
#include "context/x11_common.h"
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "SDL_syswm.h"
typedef struct sdl_menu_frame
{
bool active;
SDL_Surface *frame;
struct scaler_ctx scaler;
} sdl_menu_frame_t;
typedef struct sdl_video
{
SDL_Surface *screen;
bool quitting;
void *font;
const font_renderer_driver_t *font_driver;
uint8_t font_r;
uint8_t font_g;
uint8_t font_b;
struct scaler_ctx scaler;
sdl_menu_frame_t menu;
} sdl_video_t;
static void sdl_gfx_free(void *data)
{
sdl_video_t *vid = (sdl_video_t*)data;
if (!vid)
return;
if (vid->menu.frame)
SDL_FreeSurface(vid->menu.frame);
SDL_QuitSubSystem(SDL_INIT_VIDEO);
if (vid->font)
vid->font_driver->free(vid->font);
scaler_ctx_gen_reset(&vid->scaler);
scaler_ctx_gen_reset(&vid->menu.scaler);
free(vid);
}
static void sdl_update_scaler(SDL_Surface *surf, struct scaler_ctx *scaler,
enum scaler_pix_fmt format, unsigned width,
unsigned height, unsigned pitch)
{
if (
width != scaler->in_width
|| height != scaler->in_height
|| format != scaler->in_fmt
|| pitch != scaler->in_stride
)
{
scaler->in_fmt = format;
scaler->in_width = width;
scaler->in_height = height;
scaler->in_stride = pitch;
scaler->out_width = surf->w;
scaler->out_height = surf->h;
scaler->out_stride = surf->pitch;
scaler_ctx_gen_filter(scaler);
}
}
static void sdl_init_font(sdl_video_t *vid, const char *font_path, unsigned font_size)
{
if (!g_settings.video.font_enable)
return;
if (font_renderer_create_default(&vid->font_driver, &vid->font,
*g_settings.video.font_path ? g_settings.video.font_path : NULL,
g_settings.video.font_size))
{
int r = g_settings.video.msg_color_r * 255;
int g = g_settings.video.msg_color_g * 255;
int b = g_settings.video.msg_color_b * 255;
r = r < 0 ? 0 : (r > 255 ? 255 : r);
g = g < 0 ? 0 : (g > 255 ? 255 : g);
b = b < 0 ? 0 : (b > 255 ? 255 : b);
vid->font_r = r;
vid->font_g = g;
vid->font_b = b;
}
else
RARCH_LOG("[SDL]: Could not initialize fonts.\n");
}
static void sdl_render_msg(sdl_video_t *vid, SDL_Surface *buffer,
const char *msg, unsigned width, unsigned height, const SDL_PixelFormat *fmt)
{
int x, y, msg_base_x, msg_base_y, delta_x, delta_y;
unsigned rshift, gshift, bshift;
if (!vid->font)
return;
const struct font_atlas *atlas = vid->font_driver->get_atlas(vid->font);
msg_base_x = g_settings.video.msg_pos_x * width;
msg_base_y = (1.0f - g_settings.video.msg_pos_y) * height;
rshift = fmt->Rshift;
gshift = fmt->Gshift;
bshift = fmt->Bshift;
for (; *msg; msg++)
{
const struct font_glyph *glyph = vid->font_driver->get_glyph(vid->font, (uint8_t)*msg);
if (!glyph)
continue;
int glyph_width = glyph->width;
int glyph_height = glyph->height;
int base_x = msg_base_x + glyph->draw_offset_x;
int base_y = msg_base_y + glyph->draw_offset_y;
const uint8_t *src = atlas->buffer + glyph->atlas_offset_x + glyph->atlas_offset_y * atlas->width;
if (base_x < 0)
{
src -= base_x;
glyph_width += base_x;
base_x = 0;
}
if (base_y < 0)
{
src -= base_y * (int)atlas->width;
glyph_height += base_y;
base_y = 0;
}
int max_width = width - base_x;
int max_height = height - base_y;
if (max_width <= 0 || max_height <= 0)
continue;
if (glyph_width > max_width)
glyph_width = max_width;
if (glyph_height > max_height)
glyph_height = max_height;
uint32_t *out = (uint32_t*)buffer->pixels + base_y * (buffer->pitch >> 2) + base_x;
for (y = 0; y < glyph_height; y++, src += atlas->width, out += buffer->pitch >> 2)
{
for (x = 0; x < glyph_width; x++)
{
unsigned blend = src[x];
unsigned out_pix = out[x];
unsigned r = (out_pix >> rshift) & 0xff;
unsigned g = (out_pix >> gshift) & 0xff;
unsigned b = (out_pix >> bshift) & 0xff;
unsigned out_r = (r * (256 - blend) + vid->font_r * blend) >> 8;
unsigned out_g = (g * (256 - blend) + vid->font_g * blend) >> 8;
unsigned out_b = (b * (256 - blend) + vid->font_b * blend) >> 8;
out[x] = (out_r << rshift) | (out_g << gshift) | (out_b << bshift);
}
}
msg_base_x += glyph->advance_x;
msg_base_y += glyph->advance_y;
}
}
static void sdl_gfx_set_handles(void)
{
// SysWMinfo headers are broken on OSX. :(
#if defined(_WIN32) || defined(HAVE_X11)
SDL_SysWMinfo info;
SDL_VERSION(&info.version);
if (SDL_GetWMInfo(&info) == 1)
{
#if defined(_WIN32)
driver.display_type = RARCH_DISPLAY_WIN32;
driver.video_display = 0;
driver.video_window = (uintptr_t)info.window;
#elif defined(HAVE_X11)
driver.display_type = RARCH_DISPLAY_X11;
driver.video_display = (uintptr_t)info.info.x11.display;
driver.video_window = (uintptr_t)info.info.x11.window;
#endif
}
#endif
}
static void *sdl_gfx_init(const video_info_t *video, const input_driver_t **input, void **input_data)
{
#ifdef _WIN32
gfx_set_dwm();
#endif
#ifdef HAVE_X11
XInitThreads();
#endif
if (SDL_WasInit(0) == 0)
{
if (SDL_Init(SDL_INIT_VIDEO) < 0)
return NULL;
}
else if (SDL_InitSubSystem(SDL_INIT_VIDEO) < 0)
return NULL;
sdl_video_t *vid = (sdl_video_t*)calloc(1, sizeof(*vid));
if (!vid)
return NULL;
const SDL_VideoInfo *video_info = SDL_GetVideoInfo();
rarch_assert(video_info);
unsigned full_x = video_info->current_w;
unsigned full_y = video_info->current_h;
RARCH_LOG("[SDL]: Detecting desktop resolution %ux%u.\n", full_x, full_y);
if (!video->fullscreen)
RARCH_LOG("[SDL]: Creating window @ %ux%u\n", video->width, video->height);
vid->screen = SDL_SetVideoMode(video->width, video->height, 32,
SDL_HWSURFACE | SDL_HWACCEL | SDL_DOUBLEBUF | (video->fullscreen ? SDL_FULLSCREEN : 0));
// We assume that SDL chooses ARGB8888.
// Assuming this simplifies the driver *a ton*.
if (!vid->screen)
{
RARCH_ERR("[SDL]: Failed to init SDL surface: %s\n", SDL_GetError());
goto error;
}
if (video->fullscreen)
SDL_ShowCursor(SDL_DISABLE);
sdl_gfx_set_handles();
if (input && input_data)
{
void *sdl_input = input_sdl.init();
if (sdl_input)
{
*input = &input_sdl;
*input_data = sdl_input;
}
else
{
*input = NULL;
*input_data = NULL;
}
}
sdl_init_font(vid, g_settings.video.font_path, g_settings.video.font_size);
vid->scaler.scaler_type = video->smooth ? SCALER_TYPE_BILINEAR : SCALER_TYPE_POINT;
vid->scaler.in_fmt = video->rgb32 ? SCALER_FMT_ARGB8888 : SCALER_FMT_RGB565;
vid->scaler.out_fmt = SCALER_FMT_ARGB8888;
vid->menu.scaler = vid->scaler;
vid->menu.scaler.scaler_type = SCALER_TYPE_BILINEAR;
vid->menu.frame = SDL_ConvertSurface(vid->screen, vid->screen->format, vid->screen->flags | SDL_SRCALPHA);
if (!vid->menu.frame)
{
RARCH_ERR("[SDL]: Failed to init menu surface: %s\n", SDL_GetError());
goto error;
}
return vid;
error:
sdl_gfx_free(vid);
return NULL;
}
static void check_window(sdl_video_t *vid)
{
SDL_Event event;
SDL_PumpEvents();
while (SDL_PeepEvents(&event, 1, SDL_GETEVENT, SDL_QUITMASK))
{
if (event.type == SDL_QUIT)
{
vid->quitting = true;
break;
}
}
}
static bool sdl_gfx_frame(void *data, const void *frame, unsigned width,
unsigned height, unsigned pitch, const char *msg)
{
if (!frame)
return true;
sdl_video_t *vid = (sdl_video_t*)data;
sdl_update_scaler(vid->screen, &vid->scaler, vid->scaler.in_fmt, width, height, pitch);
if (SDL_MUSTLOCK(vid->screen))
SDL_LockSurface(vid->screen);
RARCH_PERFORMANCE_INIT(sdl_scale);
RARCH_PERFORMANCE_START(sdl_scale);
scaler_ctx_scale(&vid->scaler, vid->screen->pixels, frame);
RARCH_PERFORMANCE_STOP(sdl_scale);
if (vid->menu.active)
SDL_BlitSurface(vid->menu.frame, NULL, vid->screen, NULL);
if (msg)
sdl_render_msg(vid, vid->screen, msg, vid->screen->w, vid->screen->h, vid->screen->format);
if (SDL_MUSTLOCK(vid->screen))
SDL_UnlockSurface(vid->screen);
char buf[128];
if (gfx_get_fps(buf, sizeof(buf), NULL, 0))
SDL_WM_SetCaption(buf, NULL);
SDL_Flip(vid->screen);
g_extern.frame_count++;
return true;
}
static void sdl_gfx_set_nonblock_state(void *data, bool state)
{
(void)data; // Can SDL even do this?
(void)state;
}
static bool sdl_gfx_alive(void *data)
{
sdl_video_t *vid = (sdl_video_t*)data;
check_window(vid);
return !vid->quitting;
}
static bool sdl_gfx_focus(void *data)
{
(void)data;
return (SDL_GetAppState() & (SDL_APPINPUTFOCUS | SDL_APPACTIVE)) == (SDL_APPINPUTFOCUS | SDL_APPACTIVE);
}
static void sdl_gfx_viewport_info(void *data, struct rarch_viewport *vp)
{
sdl_video_t *vid = (sdl_video_t*)data;
vp->x = vp->y = 0;
vp->width = vp->full_width = vid->screen->w;
vp->height = vp->full_height = vid->screen->h;
}
static void sdl_set_filtering(void *data, unsigned index, bool smooth)
{
sdl_video_t *vid = (sdl_video_t*)data;
vid->scaler.scaler_type = smooth ? SCALER_TYPE_BILINEAR : SCALER_TYPE_POINT;
}
static void sdl_set_aspect_ratio(void *data, unsigned aspectratio_index)
{
sdl_video_t *vid = (sdl_video_t*)data;
switch (aspectratio_index)
{
case ASPECT_RATIO_SQUARE:
gfx_set_square_pixel_viewport(g_extern.system.av_info.geometry.base_width,
g_extern.system.av_info.geometry.base_height);
break;
case ASPECT_RATIO_CORE:
gfx_set_core_viewport();
break;
case ASPECT_RATIO_CONFIG:
gfx_set_config_viewport();
break;
default:
break;
}
g_extern.system.aspect_ratio = aspectratio_lut[aspectratio_index].value;
}
static void sdl_apply_state_changes(void *data)
{
(void)data;
}
static void sdl_set_texture_frame(void *data, const void *frame, bool rgb32,
unsigned width, unsigned height, float alpha)
{
(void) alpha;
sdl_video_t *vid = (sdl_video_t*)data;
enum scaler_pix_fmt format = rgb32 ? SCALER_FMT_ARGB8888 : SCALER_FMT_RGBA4444;
sdl_update_scaler(vid->menu.frame, &vid->menu.scaler, format, width, height,
width * (rgb32 ? sizeof(uint32_t) : sizeof(uint16_t)));
scaler_ctx_scale(&vid->menu.scaler, vid->menu.frame->pixels, frame);
SDL_SetAlpha(vid->menu.frame, SDL_SRCALPHA, 255.0 * alpha);
}
static void sdl_set_texture_enable(void *data, bool state, bool full_screen)
{
(void) full_screen;
sdl_video_t *vid = (sdl_video_t*)data;
vid->menu.active = state;
}
static void sdl_show_mouse(void *data, bool state)
{
(void)data;
SDL_ShowCursor(state);
}
static void sdl_grab_mouse_toggle(void *data)
{
(void)data;
const SDL_GrabMode mode = SDL_WM_GrabInput(SDL_GRAB_QUERY);
SDL_WM_GrabInput(mode == SDL_GRAB_ON ? SDL_GRAB_OFF : SDL_GRAB_ON);
}
static const video_poke_interface_t sdl_poke_interface = {
sdl_set_filtering,
#ifdef HAVE_FBO
NULL,
NULL,
#endif
sdl_set_aspect_ratio,
sdl_apply_state_changes,
#ifdef HAVE_MENU
sdl_set_texture_frame,
sdl_set_texture_enable,
#endif
NULL,
sdl_show_mouse,
sdl_grab_mouse_toggle,
NULL
};
static void sdl_get_poke_interface(void *data, const video_poke_interface_t **iface)
{
(void)data;
*iface = &sdl_poke_interface;
}
const video_driver_t video_sdl = {
sdl_gfx_init,
sdl_gfx_frame,
sdl_gfx_set_nonblock_state,
sdl_gfx_alive,
sdl_gfx_focus,
NULL,
sdl_gfx_free,
"sdl",
NULL,
sdl_gfx_viewport_info,
NULL,
#ifdef HAVE_OVERLAY
NULL,
#endif
sdl_get_poke_interface
};