/*

SDL - Simple DirectMedia Layer

Copyright (C) 1997-2006 Sam Lantinga

This library is free software; you can redistribute it and/or

modify it under the terms of the GNU Lesser General Public

License as published by the Free Software Foundation; either

version 2.1 of the License, or (at your option) any later version.

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

Lesser General Public License for more details.

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

Sam Lantinga

slouken@libsdl.org

*/

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include "SDL.h"

#include "SDL_error.h"

#include "SDL_video.h"

#include "SDL_mouse.h"

#include "SDL_sysvideo.h"

#include "SDL_pixels_c.h"

#include "SDL_events_c.h"

#include "SDL_dcvideo.h"

#include "SDL_dcevents_c.h"

#include "SDL_dcmouse_c.h"

#include <dc/video.h>

#include <dc/pvr.h>

#ifdef HAVE_OPENGL

#include <GL/gl.h>

#endif

/* Initialization/Query functions */

static int DC_VideoInit(_THIS, SDL_PixelFormat *vformat);

static SDL_Rect **DC_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags);

static SDL_Surface *DC_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);

static int DC_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors);

static void DC_VideoQuit(_THIS);

/* Hardware surface functions */

static int DC_AllocHWSurface(_THIS, SDL_Surface *surface);

static int DC_LockHWSurface(_THIS, SDL_Surface *surface);

static void DC_UnlockHWSurface(_THIS, SDL_Surface *surface);

static void DC_FreeHWSurface(_THIS, SDL_Surface *surface);

static int DC_FlipHWSurface(_THIS, SDL_Surface *surface);

/* etc. */

static void DC_UpdateRects(_THIS, int numrects, SDL_Rect *rects);

/* OpenGL */

static void *DC_GL_GetProcAddress(_THIS, const char *proc);

static int DC_GL_LoadLibrary(_THIS, const char *path);

static int DC_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value);

static void DC_GL_SwapBuffers(_THIS);

/* DC driver bootstrap functions */

static int DC_Available(void)

{

return 1;

}

static void DC_DeleteDevice(SDL_VideoDevice *device)

{

SDL_free(device->hidden);

SDL_free(device);

}

static SDL_VideoDevice *DC_CreateDevice(int devindex)

{

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 = DC_VideoInit;

device->ListModes = DC_ListModes;

device->SetVideoMode = DC_SetVideoMode;

device->CreateYUVOverlay = NULL;

device->SetColors = DC_SetColors;

device->UpdateRects = DC_UpdateRects;

device->VideoQuit = DC_VideoQuit;

device->AllocHWSurface = DC_AllocHWSurface;

device->CheckHWBlit = NULL;

device->FillHWRect = NULL;

device->SetHWColorKey = NULL;

device->SetHWAlpha = NULL;

device->LockHWSurface = DC_LockHWSurface;

device->UnlockHWSurface = DC_UnlockHWSurface;

device->FlipHWSurface = DC_FlipHWSurface;

device->FreeHWSurface = DC_FreeHWSurface;

#ifdef HAVE_OPENGL

device->GL_LoadLibrary = DC_GL_LoadLibrary;

device->GL_GetProcAddress = DC_GL_GetProcAddress;

device->GL_GetAttribute = DC_GL_GetAttribute;

device->GL_MakeCurrent = NULL;

device->GL_SwapBuffers = DC_GL_SwapBuffers;

#endif

device->SetCaption = NULL;

device->SetIcon = NULL;

device->IconifyWindow = NULL;

device->GrabInput = NULL;

device->GetWMInfo = NULL;

device->InitOSKeymap = DC_InitOSKeymap;

device->PumpEvents = DC_PumpEvents;

device->free = DC_DeleteDevice;

return device;

}

VideoBootStrap DC_bootstrap = {

"dcvideo", "Dreamcast Video",

DC_Available, DC_CreateDevice

};

int DC_VideoInit(_THIS, SDL_PixelFormat *vformat)

{

/* Determine the screen depth (use default 16-bit depth) */

/* we change this during the SDL_SetVideoMode implementation... */

vformat->BitsPerPixel = 16;

vformat->Rmask = 0x0000f800;

vformat->Gmask = 0x000007e0;

vformat->Bmask = 0x0000001f;

/* We're done! */

return(0);

}

const static SDL_Rect

RECT_800x600 = {0,0,800,600},

RECT_640x480 = {0,0,640,480},

RECT_320x240 = {0,0,320,240};

const static SDL_Rect *vid_modes[] = {

&RECT_800x600,

&RECT_640x480,

&RECT_320x240,

NULL

};

SDL_Rect **DC_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)

{

switch(format->BitsPerPixel) {

case 15:

case 16:

return &vid_modes;

case 32:

if (!(flags & SDL_OPENGL))

return &vid_modes;

default:

return NULL;

}

// return (SDL_Rect **) -1;

}

pvr_init_params_t params = {

/* Enable opaque and translucent polygons with size 16 */

{ PVR_BINSIZE_16, PVR_BINSIZE_0, PVR_BINSIZE_16, PVR_BINSIZE_0, PVR_BINSIZE_16 },

/* Vertex buffer size */

512*1024

};

#ifdef HAVE_OPENGL

static int pvr_inited;

#endif

SDL_Surface *DC_SetVideoMode(_THIS, SDL_Surface *current,

int width, int height, int bpp, Uint32 flags)

{

int disp_mode,pixel_mode,pitch;

Uint32 Rmask, Gmask, Bmask;

if (width==320 && height==240) disp_mode=DM_320x240;

else if (width==640 && height==480) disp_mode=DM_640x480;

else if (width==800 && height==600) disp_mode=DM_800x608;

else {

SDL_SetError("Couldn't find requested mode in list");

return(NULL);

}

switch(bpp) {

case 15: pixel_mode = PM_RGB555; pitch = width*2;

/* 5-5-5 */

Rmask = 0x00007c00;

Gmask = 0x000003e0;

Bmask = 0x0000001f;

break;

case 16: pixel_mode = PM_RGB565; pitch = width*2;

/* 5-6-5 */

Rmask = 0x0000f800;

Gmask = 0x000007e0;

Bmask = 0x0000001f;

break;

case 24: bpp = 32;

case 32: pixel_mode = PM_RGB888; pitch = width*4;

Rmask = 0x00ff0000;

Gmask = 0x0000ff00;

Bmask = 0x000000ff;

#ifdef HAVE_OPENGL

if (!(flags & SDL_OPENGL))

#endif

break;

default:

SDL_SetError("Couldn't find requested mode in list");

return(NULL);

}

// if ( bpp != current->format->BitsPerPixel ) {

if ( ! SDL_ReallocFormat(current, bpp, Rmask, Gmask, Bmask, 0) ) {

return(NULL);

}

// }

/* Set up the new mode framebuffer */

current->flags = (SDL_FULLSCREEN|SDL_HWSURFACE);

current->w = width;

current->h = height;

current->pitch = pitch;

#ifdef HAVE_OPENGL

if (pvr_inited) {

pvr_inited = 0;

pvr_shutdown();

}

#endif

vid_set_mode(disp_mode,pixel_mode);

current->pixels = vram_s;

#ifdef HAVE_OPENGL

if (flags & SDL_OPENGL) {

this->gl_config.driver_loaded = 1;

current->flags = SDL_FULLSCREEN | SDL_OPENGL;

current->pixels = NULL;

pvr_inited = 1;

pvr_init(&params);

glKosInit();

glKosBeginFrame();

} else

#endif

if (flags | SDL_DOUBLEBUF) {

current->flags |= SDL_DOUBLEBUF;

current->pixels = (void*)((int)current->pixels | 0x400000);

}

/* We're done */

return(current);

}

/* We don't actually allow hardware surfaces other than the main one */

static int DC_AllocHWSurface(_THIS, SDL_Surface *surface)

{

return(-1);

}

static void DC_FreeHWSurface(_THIS, SDL_Surface *surface)

{

return;

}

/* We need to wait for vertical retrace on page flipped displays */

static int DC_LockHWSurface(_THIS, SDL_Surface *surface)

{

return(0);

}

static void DC_UnlockHWSurface(_THIS, SDL_Surface *surface)

{

return;

}

static int DC_FlipHWSurface(_THIS, SDL_Surface *surface)

{

if (surface->flags & SDL_DOUBLEBUF) {

vid_set_start((int)surface->pixels & 0xffffff);

surface->pixels = (void*)((int)surface->pixels ^ 0x400000);

}

return(0);

}

static void DC_UpdateRects(_THIS, int numrects, SDL_Rect *rects)

{

/* do nothing. */

}

static int DC_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)

{

/* do nothing of note. */

return(1);

}

/* Note: If we are terminated, this could be called in the middle of

another SDL video routine -- notably UpdateRects.

*/

static void DC_VideoQuit(_THIS)

{

#ifdef HAVE_OPENGL

if (pvr_inited) {

pvr_inited = 0;

pvr_shutdown();

}

#endif

}

#ifdef HAVE_OPENGL

void dmyfunc(void) {}

typedef void (*funcptr)();

const static struct {

char *name;

funcptr addr;

} glfuncs[] = {

#define DEF(func) {#func,&func}

DEF(glBegin),

DEF(glBindTexture),

DEF(glBlendFunc),

DEF(glColor4f),

// DEF(glCopyImageID),

DEF(glDisable),

DEF(glEnable),

DEF(glEnd),

DEF(glFlush),

DEF(glGenTextures),

DEF(glGetString),

DEF(glLoadIdentity),

DEF(glMatrixMode),

DEF(glOrtho),

DEF(glPixelStorei),

// DEF(glPopAttrib),

// DEF(glPopClientAttrib),

{"glPopAttrib",&dmyfunc},

{"glPopClientAttrib",&dmyfunc},

DEF(glPopMatrix),

// DEF(glPushAttrib),

// DEF(glPushClientAttrib),

{"glPushAttrib",&dmyfunc},

{"glPushClientAttrib",&dmyfunc},

DEF(glPushMatrix),

DEF(glTexCoord2f),

DEF(glTexEnvf),

DEF(glTexImage2D),

DEF(glTexParameteri),

DEF(glTexSubImage2D),

DEF(glVertex2i),

DEF(glViewport),

#undef DEF

};

static void *DC_GL_GetProcAddress(_THIS, const char *proc)

{

void *ret;

int i;

ret = glKosGetProcAddress(proc);

if (ret) return ret;

for(i=0;i<sizeof(glfuncs)/sizeof(glfuncs[0]);i++) {

if (SDL_strcmp(proc,glfuncs[i].name)==0) return glfuncs[i].addr;

}

return NULL;

}

static int DC_GL_LoadLibrary(_THIS, const char *path)

{

this->gl_config.driver_loaded = 1;

return 0;

}

static int DC_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value)

{

GLenum mesa_attrib;

int val;

switch(attrib) {

case SDL_GL_RED_SIZE:

val = 5;

break;

case SDL_GL_GREEN_SIZE:

val = 6;

break;

case SDL_GL_BLUE_SIZE:

val = 5;

break;

case SDL_GL_ALPHA_SIZE:

val = 0;

break;

case SDL_GL_DOUBLEBUFFER:

val = 1;

break;

case SDL_GL_DEPTH_SIZE:

val = 16; /* or 32? */

break;

case SDL_GL_STENCIL_SIZE:

val = 0;

break;

case SDL_GL_ACCUM_RED_SIZE:

val = 0;

break;

case SDL_GL_ACCUM_GREEN_SIZE:

val = 0;

case SDL_GL_ACCUM_BLUE_SIZE:

val = 0;

break;

case SDL_GL_ACCUM_ALPHA_SIZE:

val = 0;

break;

default :

return -1;

}

*value = val;

return 0;

}

static void DC_GL_SwapBuffers(_THIS)

{

glKosFinishFrame();

glKosBeginFrame();

}

#endif