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SDL_pgvideo.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2006 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library 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
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Sam Lantinga
slouken@libsdl.org
Micah Dowty
micahjd@users.sourceforge.net
*/
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#include "SDL_config.h"
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#include "SDL_video.h"
#include "SDL_mouse.h"
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#include "../SDL_sysvideo.h"
#include "../SDL_pixels_c.h"
#include "../../events/SDL_events_c.h"
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#include "SDL_pgvideo.h"
#include "SDL_pgevents_c.h"
#define PGVID_DRIVER_NAME "picogui"
/* Initialization/Query functions */
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static int PG_VideoInit(_THIS, SDL_PixelFormat * vformat);
static SDL_Rect **PG_ListModes(_THIS, SDL_PixelFormat * format, Uint32 flags);
static SDL_Surface *PG_SetVideoMode(_THIS, SDL_Surface * current, int width,
int height, int bpp, Uint32 flags);
static int PG_SetColors(_THIS, int firstcolor, int ncolors,
SDL_Color * colors);
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static void PG_VideoQuit(_THIS);
/* Hardware surface functions */
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static int PG_AllocHWSurface(_THIS, SDL_Surface * surface);
static int PG_LockHWSurface(_THIS, SDL_Surface * surface);
static void PG_UnlockHWSurface(_THIS, SDL_Surface * surface);
static void PG_FreeHWSurface(_THIS, SDL_Surface * surface);
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/* etc. */
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static void PG_UpdateRects(_THIS, int numrects, SDL_Rect * rects);
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// The implementation dependent data for the window manager cursor
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struct WMcursor
{
/* Our cursor is a PicoGUI theme */
pghandle theme;
};
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/* WM functions */
void PG_SetCaption(_THIS, const char *title, const char *icon);
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WMcursor *PG_CreateWMCursor(_THIS, Uint8 * data, Uint8 * mask,
int w, int h, int hot_x, int hot_y);
void PG_FreeWMCursor(_THIS, WMcursor * cursor);
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void PG_WarpWMCursor(_THIS, Uint16 x, Uint16 y);
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int PG_ShowWMCursor(_THIS, WMcursor * cursor);
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/* PicoGUI driver bootstrap functions */
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static int
PG_Available(void)
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{
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/* FIXME: The current client lib doesn't give a way to see if the picogui
* server is reachable without causing a fatal error if it isn't.
* This should be fixed in cli_c2, but until then assume we can
* connect. Since more common drivers like X11 are probed first anyway,
* this shouldn't be a huge problem.
*/
return (1);
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}
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static void
PG_DeleteDevice(SDL_VideoDevice * device)
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{
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SDL_free(device->hidden);
SDL_free(device);
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}
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static SDL_VideoDevice *
PG_CreateDevice(int devindex)
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{
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SDL_VideoDevice *device;
/* Initialize all variables that we clean on shutdown */
device = (SDL_VideoDevice *) SDL_malloc(sizeof(SDL_VideoDevice));
if (device) {
SDL_memset(device, 0, (sizeof *device));
device->hidden = (struct SDL_PrivateVideoData *)
SDL_malloc((sizeof *device->hidden));
}
if ((device == NULL) || (device->hidden == NULL)) {
SDL_OutOfMemory();
if (device) {
SDL_free(device);
}
return (0);
}
SDL_memset(device->hidden, 0, (sizeof *device->hidden));
/* Set the function pointers */
device->VideoInit = PG_VideoInit;
device->ListModes = PG_ListModes;
device->SetVideoMode = PG_SetVideoMode;
device->CreateYUVOverlay = NULL;
device->SetColors = PG_SetColors;
device->UpdateRects = PG_UpdateRects;
device->VideoQuit = PG_VideoQuit;
device->AllocHWSurface = PG_AllocHWSurface;
device->CheckHWBlit = NULL;
device->FillHWRect = NULL;
device->SetHWColorKey = NULL;
device->SetHWAlpha = NULL;
device->LockHWSurface = PG_LockHWSurface;
device->UnlockHWSurface = PG_UnlockHWSurface;
device->FlipHWSurface = NULL;
device->FreeHWSurface = PG_FreeHWSurface;
device->SetCaption = PG_SetCaption;
device->SetIcon = NULL;
device->IconifyWindow = NULL;
device->GrabInput = NULL;
device->PumpEvents = PG_PumpEvents;
device->InitOSKeymap = PG_InitOSKeymap;
device->ShowWMCursor = PG_ShowWMCursor;
device->CreateWMCursor = PG_CreateWMCursor;
device->FreeWMCursor = PG_FreeWMCursor;
device->WarpWMCursor = PG_WarpWMCursor;
device->free = PG_DeleteDevice;
return device;
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}
VideoBootStrap PG_bootstrap = {
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PGVID_DRIVER_NAME, "PicoGUI SDL driver",
PG_Available, PG_CreateDevice
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};
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int
PG_VideoInit(_THIS, SDL_PixelFormat * vformat)
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{
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/* Connect to the PicoGUI server. No way to process command line args yet,
* but since this is based on SHM it's not important to be able to specify
* a remote PicoGUI server.
*
* FIXME: Another nitpick about the current client lib is there's no
* clean way to indicate that command line args are not available.
*/
pgInit(0, (char **) "");
this->hidden->mi = *pgGetVideoMode();
/* Create a picogui application and canvas. We'll populate the canvas later. */
this->hidden->wApp = pgRegisterApp(PG_APP_NORMAL, "SDL", 0);
this->hidden->wCanvas = pgNewWidget(PG_WIDGET_CANVAS, 0, 0);
pgSetWidget(PGDEFAULT, PG_WP_SIDE, PG_S_ALL, 0);
PG_InitEvents(this);
/* Determine the current screen size */
this->info.current_w = this->hidden->mi.lxres;
this->info.current_h = this->hidden->mi.lyres;
/* Determine the screen depth.
* We change this during the SDL_SetVideoMode implementation...
* Round up to the nearest Bytes per pixel
*/
vformat->BitsPerPixel = this->hidden->mi.bpp;
vformat->BytesPerPixel = this->hidden->mi.bpp >> 3;
if (this->hidden->mi.bpp & 7)
vformat->BytesPerPixel++;
/* We're done! */
return (0);
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}
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SDL_Rect **
PG_ListModes(_THIS, SDL_PixelFormat * format, Uint32 flags)
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{
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return (SDL_Rect **) - 1;
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}
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SDL_Surface *
PG_SetVideoMode(_THIS, SDL_Surface * current,
int width, int height, int bpp, Uint32 flags)
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{
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if (this->hidden->bitmap) {
/* Free old bitmap */
if (current->pixels) {
shmdt(current->pixels);
current->pixels = NULL;
}
pgDelete(this->hidden->bitmap);
}
/* Allocate the new pixel format for the screen */
if (!SDL_ReallocFormat(current, bpp, 0, 0, 0, 0)) {
SDL_SetError("Couldn't allocate new pixel format for requested mode");
return (NULL);
}
/* Create a new picogui bitmap */
this->hidden->bitmap = pgCreateBitmap(width, height);
this->hidden->shm = *pgMakeSHMBitmap(this->hidden->bitmap);
current->pixels = shmat(shmget(this->hidden->shm.shm_key,
this->hidden->shm.shm_length, 0), NULL, 0);
/* Reset the canvas, and draw persistent and incremental grops.
* Use mapping and offsets to center it.
*/
pgWriteCmd(this->hidden->wCanvas, PGCANVAS_NUKE, 0);
/* 0. Set the source position during incremental rendering
*/
pgWriteCmd(this->hidden->wCanvas, PGCANVAS_GROP, 5, PG_GROP_SETSRC, 0, 0,
0, 0);
pgWriteCmd(this->hidden->wCanvas, PGCANVAS_GROPFLAGS, 1,
PG_GROPF_INCREMENTAL);
/* 1. Incremental bitmap rendering
*/
pgWriteCmd(this->hidden->wCanvas, PGCANVAS_GROP, 6, PG_GROP_BITMAP,
0, 0, 0, 0, this->hidden->bitmap);
pgWriteCmd(this->hidden->wCanvas, PGCANVAS_GROPFLAGS, 1,
PG_GROPF_INCREMENTAL);
/* 2. Normal bitmap rendering
*/
pgWriteCmd(this->hidden->wCanvas, PGCANVAS_GROP, 6, PG_GROP_BITMAP,
0, 0, this->hidden->shm.width, this->hidden->shm.height,
this->hidden->bitmap);
/* Set up the new mode framebuffer */
current->flags = 0;
current->w = this->hidden->shm.width;
current->h = this->hidden->shm.height;
current->pitch = this->hidden->shm.pitch;
/* Set up pixel format */
current->format->BitsPerPixel = this->hidden->shm.bpp;
current->format->BytesPerPixel = this->hidden->shm.bpp >> 3;
if (this->hidden->shm.bpp & 7)
current->format->BytesPerPixel++;
current->format->palette = NULL;
current->format->Rmask = this->hidden->shm.red_mask;
current->format->Gmask = this->hidden->shm.green_mask;
current->format->Bmask = this->hidden->shm.blue_mask;
current->format->Amask = this->hidden->shm.alpha_mask;
current->format->Rshift = this->hidden->shm.red_shift;
current->format->Gshift = this->hidden->shm.green_shift;
current->format->Bshift = this->hidden->shm.blue_shift;
current->format->Ashift = this->hidden->shm.alpha_shift;
current->format->Rloss = 8 - this->hidden->shm.red_length;
current->format->Gloss = 8 - this->hidden->shm.green_length;
current->format->Bloss = 8 - this->hidden->shm.blue_length;
current->format->Aloss = 8 - this->hidden->shm.alpha_length;
/* Draw the app */
pgUpdate();
/* We're done */
return (current);
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}
/* We don't actually allow hardware surfaces other than the main one */
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static int
PG_AllocHWSurface(_THIS, SDL_Surface * surface)
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{
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return (-1);
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}
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static void
PG_FreeHWSurface(_THIS, SDL_Surface * surface)
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{
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return;
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}
/* We need to wait for vertical retrace on page flipped displays */
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static int
PG_LockHWSurface(_THIS, SDL_Surface * surface)
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{
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return (0);
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}
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static void
PG_UnlockHWSurface(_THIS, SDL_Surface * surface)
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{
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return;
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}
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static void
PG_UpdateRects(_THIS, int numrects, SDL_Rect * rects)
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{
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int i;
for (i = 0; i < numrects; i++) {
if (rects[i].w <= 0 || rects[i].h <= 0)
continue;
/* Schedule an incremental update for this rectangle, using
* the canvas gropnodes we've loaded beforehand.
*/
pgWriteCmd(this->hidden->wCanvas, PGCANVAS_FINDGROP, 1, 0);
pgWriteCmd(this->hidden->wCanvas, PGCANVAS_MOVEGROP, 4,
rects[i].x, rects[i].y, rects[i].w, rects[i].h);
pgWriteCmd(this->hidden->wCanvas, PGCANVAS_FINDGROP, 1, 1);
pgWriteCmd(this->hidden->wCanvas, PGCANVAS_MOVEGROP, 4,
rects[i].x, rects[i].y, rects[i].w, rects[i].h);
/* Go perform the update */
pgWriteCmd(this->hidden->wCanvas, PGCANVAS_INCREMENTAL, 0);
pgSubUpdate(this->hidden->wCanvas);
}
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}
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int
PG_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color * colors)
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{
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/* do nothing of note. */
return (1);
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}
/* Note: If we are terminated, this could be called in the middle of
another SDL video routine -- notably UpdateRects.
*/
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void
PG_VideoQuit(_THIS)
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{
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if (this->screen->pixels != NULL) {
shmdt(this->screen->pixels);
this->screen->pixels = NULL;
pgDelete(this->hidden->bitmap);
}
pgDelete(this->hidden->wCanvas);
pgDelete(this->hidden->wApp);
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}
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void
PG_SetCaption(_THIS, const char *title, const char *icon)
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{
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if (title != NULL)
pgReplaceText(this->hidden->wApp, title);
pgUpdate();
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}
/* FIXME: The cursor stuff isn't implemented yet! */
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WMcursor *
PG_CreateWMCursor(_THIS, Uint8 * data, Uint8 * mask,
int w, int h, int hot_x, int hot_y)
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{
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static WMcursor dummy;
return &dummy;
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}
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void
PG_FreeWMCursor(_THIS, WMcursor * cursor)
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{
}
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void
PG_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
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{
}
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int
PG_ShowWMCursor(_THIS, WMcursor * cursor)
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{
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return 1;
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}
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/* vi: set ts=4 sw=4 expandtab: */