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SDL_gapirender.c
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SDL_gapirender.c
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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2010 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
Stefan Klug
klug.stefan@gmx.de
*/
#include "SDL_config.h"
#if SDL_VIDEO_RENDER_GAPI
#include "SDL_win32video.h"
//#include "../SDL_sysvideo.h"
#include "../SDL_yuv_sw_c.h"
#include "../SDL_renderer_sw.h"
#include "SDL_gapirender_c.h"
#define GAPI_RENDERER_DEBUG 1
/* GAPI renderer implementation */
static SDL_Renderer *GAPI_CreateRenderer(SDL_Window * window, Uint32 flags);
static int GAPI_RenderDrawPoints(SDL_Renderer * renderer,
const SDL_Point * points, int count);
static int GAPI_RenderDrawLines(SDL_Renderer * renderer,
const SDL_Point * points, int count);
static int GAPI_RenderDrawRects(SDL_Renderer * renderer,
const SDL_Rect ** rects, int count);
static int GAPI_RenderFillRects(SDL_Renderer * renderer,
const SDL_Rect ** rects, int count);
static int GAPI_RenderCopy(SDL_Renderer * renderer,
SDL_Texture * texture,
const SDL_Rect * srcrect,
const SDL_Rect * dstrect);
static void GAPI_RenderPresent(SDL_Renderer * renderer);
static void GAPI_DestroyRenderer(SDL_Renderer * renderer);
SDL_RenderDriver GAPI_RenderDriver = {
GAPI_CreateRenderer,
{
"gapi",
(SDL_RENDERER_SINGLEBUFFER),
}
};
static HMODULE g_hGapiLib = 0;
// for testing with GapiEmu
#define USE_GAPI_EMU 0
#define EMULATE_AXIM_X30 0
#if 0
#define GAPI_LOG(...) printf(__VA_ARGS__)
#else
#define GAPI_LOG(...)
#endif
#if USE_GAPI_EMU && !REPORT_VIDEO_INFO
#pragma message("Warning: Using GapiEmu in release build. I assume you'd like to set USE_GAPI_EMU to zero.")
#endif
static void
GAPI_SetError(const char *prefix, HRESULT result)
{
const char *error;
switch (result) {
default:
error = "UNKNOWN";
break;
}
SDL_SetError("%s: %s", prefix, error);
}
void
GAPI_AddRenderDriver(_THIS)
{
int i;
/* TODO: should we check for support of GetRawFramebuffer here?
*/
#if USE_GAPI_EMU
g_hGapiLib = LoadLibrary(L"GAPI_Emu.dll");
#else
g_hGapiLib = LoadLibrary(L"\\Windows\\gx.dll");
#endif
if (g_hGapiLib) {
#define LINK(name,import) gx.name = (PFN##name)GetProcAddress( g_hGapiLib, L##import );
LINK(GXOpenDisplay, "?GXOpenDisplay@@YAHPAUHWND__@@K@Z")
LINK(GXCloseDisplay, "?GXCloseDisplay@@YAHXZ")
LINK(GXBeginDraw, "?GXBeginDraw@@YAPAXXZ")
LINK(GXEndDraw, "?GXEndDraw@@YAHXZ")
LINK(GXOpenInput, "?GXOpenInput@@YAHXZ")
LINK(GXCloseInput, "?GXCloseInput@@YAHXZ")
LINK(GXGetDisplayProperties,
"?GXGetDisplayProperties@@YA?AUGXDisplayProperties@@XZ")
LINK(GXGetDefaultKeys, "?GXGetDefaultKeys@@YA?AUGXKeyList@@H@Z")
LINK(GXSuspend, "?GXSuspend@@YAHXZ")
LINK(GXResume, "?GXResume@@YAHXZ")
LINK(GXSetViewport, "?GXSetViewport@@YAHKKKK@Z")
LINK(GXIsDisplayDRAMBuffer, "?GXIsDisplayDRAMBuffer@@YAHXZ")
/* wrong gapi.dll */
if (!gx.GXOpenDisplay) {
FreeLibrary(g_hGapiLib);
g_hGapiLib = 0;
}
#undef LINK
}
for (i = 0; i < _this->num_displays; ++i) {
SDL_AddRenderDriver(&_this->displays[i], &GAPI_RenderDriver);
}
}
typedef enum
{
USAGE_GX_FUNCS = 0x0001, /* enable to use GXOpen/GXClose/GXBeginDraw... */
USAGE_DATA_PTR_CONSTANT = 0x0002 /* the framebuffer is at a constant location, don't use values from GXBeginDraw() */
} GAPI_UsageFlags;
typedef struct
{
int w;
int h;
int xPitch; /* bytes to move to go to the next pixel */
int yPitch; /* bytes to move to go to the next line */
int offset; /* data offset, to add to the data returned from GetFramebuffer, before processing */
void *data;
Uint32 usageFlags; /* these flags contain options to define screen handling and to reliably workarounds */
Uint32 format; /* pixel format as defined in SDL_pixels.h */
} GAPI_RenderData;
static Uint32
GuessPixelFormatFromBpp(int bpp)
{
switch (bpp) {
case 15:
return SDL_PIXELFORMAT_RGB555;
case 16:
return SDL_PIXELFORMAT_RGB565;
default:
return SDL_PIXELFORMAT_UNKNOWN;
break;
}
}
static GAPI_RenderData *
FillRenderDataRawFramebuffer(SDL_Window * window)
{
RawFrameBufferInfo rbi;
GAPI_RenderData *renderdata;
HDC hdc;
//TODO should we use the hdc of the window?
hdc = GetDC(NULL);
int result = ExtEscape(hdc, GETRAWFRAMEBUFFER, 0, NULL,
sizeof(RawFrameBufferInfo),
(char *) &rbi);
ReleaseDC(NULL, hdc);
if (!(result > 0)) {
return NULL;
}
/* Asus A696 returns wrong results so we do a sanity check
See:
http://groups.google.com/group/microsoft.public.smartphone.developer/browse_thread/thread/4fde5bddd477de81
*/
if (rbi.cxPixels <= 0 ||
rbi.cyPixels <= 0 ||
rbi.cxStride == 0 || rbi.cyStride == 0 || rbi.pFramePointer == 0) {
return NULL;
}
renderdata = (GAPI_RenderData *) SDL_calloc(1, sizeof(*renderdata));
if (!renderdata) {
SDL_OutOfMemory();
return NULL;
}
//Try to match the window size
//TODO add rotation support
if (rbi.cxPixels != window->w || rbi.cyPixels != window->h) {
SDL_free(renderdata);
return NULL;
}
//Check that the display uses a known display format
switch (rbi.wFormat) {
case FORMAT_565:
renderdata->format = SDL_PIXELFORMAT_RGB565;
break;
case FORMAT_555:
renderdata->format = SDL_PIXELFORMAT_RGB555;
break;
default:
//TODO we should add support for other formats
SDL_free(renderdata);
return NULL;
}
renderdata->usageFlags = USAGE_DATA_PTR_CONSTANT;
renderdata->data = rbi.pFramePointer;
renderdata->w = rbi.cxPixels;
renderdata->h = rbi.cyPixels;
renderdata->xPitch = rbi.cxStride;
renderdata->yPitch = rbi.cyStride;
return renderdata;
}
static GAPI_RenderData *
FillRenderDataGAPI(SDL_Window * window)
{
GAPI_RenderData *renderdata;
struct GXDisplayProperties gxdp;
int tmp;
#ifdef _ARM_
WCHAR oemstr[100];
#endif
if (!g_hGapiLib) {
return NULL;
}
renderdata = (GAPI_RenderData *) SDL_calloc(1, sizeof(GAPI_RenderData));
if (!renderdata) {
SDL_OutOfMemory();
return NULL;
}
gxdp = gx.GXGetDisplayProperties();
renderdata->usageFlags = USAGE_GX_FUNCS;
renderdata->w = gxdp.cxWidth;
renderdata->h = gxdp.cyHeight;
renderdata->xPitch = gxdp.cbxPitch;
renderdata->yPitch = gxdp.cbyPitch;
//Check that the display uses a known display format
if (gxdp.ffFormat & kfDirect565) {
renderdata->format = SDL_PIXELFORMAT_RGB565;
} else if (gxdp.ffFormat & kfDirect555) {
renderdata->format = SDL_PIXELFORMAT_RGB555;
} else {
renderdata->format = SDL_PIXELFORMAT_UNKNOWN;
}
/* apply some device specific corrections */
#ifdef _ARM_
SystemParametersInfo(SPI_GETOEMINFO, sizeof(oemstr), oemstr, 0);
// buggy iPaq38xx
if ((oemstr[12] == 'H') && (oemstr[13] == '3')
&& (oemstr[14] == '8')
&& (gxdp.cbxPitch > 0)) {
renderdata->data = (void *) 0xac0755a0;
renderdata->xPitch = -640;
renderdata->yPitch = 2;
}
#if (EMULATE_AXIM_X30 == 0)
// buggy Dell Axim X30
if (_tcsncmp(oemstr, L"Dell Axim X30", 13) == 0)
#endif
{
GXDeviceInfo gxInfo = { 0 };
HDC hdc = GetDC(NULL);
int result;
gxInfo.Version = 100;
result =
ExtEscape(hdc, GETGXINFO, 0, NULL, sizeof(gxInfo),
(char *) &gxInfo);
if (result > 0) {
renderdata->usageFlags = USAGE_DATA_PTR_CONSTANT; /* no more GAPI usage from now */
renderdata->data = gxInfo.pvFrameBuffer;
this->hidden->needUpdate = 0;
renderdata->xPitch = 2;
renderdata->yPitch = 480;
renderdata->w = gxInfo.cxWidth;
renderdata->h = gxInfo.cyHeight;
//Check that the display uses a known display format
switch (rbi->wFormat) {
case FORMAT_565:
renderdata->format = SDL_PIXELFORMAT_RGB565;
break;
case FORMAT_555:
renderdata->format = SDL_PIXELFORMAT_RGB555;
break;
default:
//TODO we should add support for other formats
SDL_free(renderdata);
return NULL;
}
}
}
#endif
if (renderdata->format == SDL_PIXELFORMAT_UNKNOWN) {
SDL_SetError("Gapi Pixelformat is unknown");
SDL_free(renderdata);
return NULL;
}
/* Gapi always returns values in standard orientation, so we manually apply
the current orientation
*/
DEVMODE settings;
SDL_memset(&settings, 0, sizeof(DEVMODE));
settings.dmSize = sizeof(DEVMODE);
settings.dmFields = DM_DISPLAYORIENTATION;
ChangeDisplaySettingsEx(NULL, &settings, NULL, CDS_TEST, NULL);
if (settings.dmDisplayOrientation == DMDO_90) {
tmp = renderdata->w;
renderdata->w = renderdata->h;
renderdata->h = tmp;
tmp = renderdata->xPitch;
renderdata->xPitch = -renderdata->yPitch;
renderdata->yPitch = tmp;
renderdata->offset = -renderdata->w * renderdata->xPitch;
} else if (settings.dmDisplayOrientation == DMDO_180) {
renderdata->xPitch = -renderdata->xPitch;
renderdata->yPitch = -renderdata->yPitch;
renderdata->offset = -renderdata->h * renderdata->yPitch
- renderdata->w * renderdata->xPitch;
} else if (settings.dmDisplayOrientation == DMDO_270) {
tmp = renderdata->w;
renderdata->w = renderdata->h;
renderdata->h = tmp;
tmp = renderdata->xPitch;
renderdata->xPitch = renderdata->yPitch;
renderdata->yPitch = -tmp;
renderdata->offset = -renderdata->h * renderdata->yPitch;
}
if (renderdata->w != window->w || renderdata->h != window->h) {
GAPI_LOG("GAPI open failed, wrong size %i %i %i %i\n", renderdata->w,
renderdata->h, renderdata->xPitch, renderdata->yPitch);
SDL_free(renderdata);
return NULL;
}
return renderdata;
}
/* This function does the whole encapsulation of Gapi/RAWFRAMEBUFFER
it should handle all the device dependent details and fill the device INDEPENDENT
RenderData structure.
*/
GAPI_RenderData *
FillRenderData(SDL_Window * window)
{
/* We try to match the requested window to the modes available by GAPI and RAWFRAMEBUFFER.
First RAWFRAMEBUFFER is tried, as it is the most reliable one
Look here for detailed discussions:
http://pdaphonehome.com/forums/samsung-i700/28087-just-saw.html
http://blogs.msdn.com/windowsmobile/archive/2007/08/13/have-you-migrated-to-directdraw-yet.aspx
*/
GAPI_RenderData *res;
res = FillRenderDataRawFramebuffer(window);
GAPI_LOG("FillRenderDataRawFramebuffer: %p\n", res);
if (res) {
return res;
}
//Now we try gapi
res = FillRenderDataGAPI(window);
GAPI_LOG("FillRenderDataGAPI: %p\n", res);
return res;
}
void *
GetFramebuffer()
{
}
SDL_Renderer *
GAPI_CreateRenderer(SDL_Window * window, Uint32 flags)
{
SDL_VideoDisplay *display = window->display;
SDL_WindowData *windowdata = (SDL_WindowData *) window->driverdata;
SDL_DisplayMode *displayMode = &display->current_mode;
SDL_Renderer *renderer;
GAPI_RenderData *data;
int i, n;
int bpp;
Uint32 Rmask, Gmask, Bmask, Amask;
if (!(window->flags & SDL_WINDOW_FULLSCREEN)) {
SDL_SetError("Gapi supports only fullscreen windows");
return NULL;
}
if (!SDL_PixelFormatEnumToMasks
(displayMode->format, &bpp, &Rmask, &Gmask, &Bmask, &Amask)) {
SDL_SetError("Unknown display format");
return NULL;
}
renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
if (!renderer) {
SDL_OutOfMemory();
return NULL;
}
data = FillRenderData(window);
if (!data) {
GAPI_DestroyRenderer(renderer);
SDL_OutOfMemory();
return NULL;
}
renderer->RenderDrawPoints = GAPI_RenderDrawPoints;
renderer->RenderDrawLines = GAPI_RenderDrawLines;
renderer->RenderDrawRects = GAPI_RenderDrawRects;
renderer->RenderFillRects = GAPI_RenderFillRects;
renderer->RenderCopy = GAPI_RenderCopy;
renderer->RenderPresent = GAPI_RenderPresent;
renderer->DestroyRenderer = GAPI_DestroyRenderer;
renderer->info.name = GAPI_RenderDriver.info.name;
renderer->info.flags = 0;
renderer->window = window;
renderer->driverdata = data;
/* Gapi provides only a framebuffer so lets use software implementation */
Setup_SoftwareRenderer(renderer);
#ifdef GAPI_RENDERER_DEBUG
printf("Created gapi renderer\n");
printf("use GX functions: %i\n", data->usageFlags & USAGE_GX_FUNCS);
printf("framebuffer is constant: %i\n",
data->usageFlags & USAGE_DATA_PTR_CONSTANT);
printf("w: %i h: %i\n", data->w, data->h);
printf("data ptr: %p\n", data->data); /* this can be 0 in case of GAPI usage */
printf("xPitch: %i\n", data->xPitch);
printf("yPitch: %i\n", data->yPitch);
printf("offset: %i\n", data->offset);
printf("format: %x\n", data->format);
#endif
if (data->usageFlags & USAGE_GX_FUNCS) {
if (gx.GXOpenDisplay(windowdata->hwnd, GX_FULLSCREEN) == 0) {
GAPI_DestroyRenderer(renderer);
return NULL;
}
}
return renderer;
}
static int
GAPI_RenderDrawPoints(SDL_Renderer * renderer,
const SDL_Point * points, int count)
{
// TODO implement
SDL_Unsupported();
return -1;
}
static int
GAPI_RenderDrawLines(SDL_Renderer * renderer,
const SDL_Point * points, int count)
{
// TODO implement
SDL_Unsupported();
return -1;
}
static int
GAPI_RenderDrawRects(SDL_Renderer * renderer,
const SDL_Rect ** rects, int count)
{
// TODO implement
SDL_Unsupported();
return -1;
}
static int
GAPI_RenderFillRects(SDL_Renderer * renderer,
const SDL_Rect ** rects, int count)
{
// TODO implement
SDL_Unsupported();
return -1;
}
/* Video memory is very slow so lets optimize as much as possible */
static void
updateLine16to16(char *src, int srcXPitch, int srcYPitch,
char *dst, int dstXPitch, int dstYPitch, int width,
int height)
{
char *srcLine, *dstLine;
char *srcPix, *dstPix;
int x, y;
//First dumb solution
if (srcXPitch == 2 && dstXPitch == 2) {
srcLine = src;
dstLine = dst;
y = height;
while (y--) {
SDL_memcpy(dstLine, srcLine, width * sizeof(Uint16));
srcLine += srcYPitch;
dstLine += dstYPitch;
}
} else {
//printf("GAPI uses slow blit path %i, %i\n", dstXPitch, dstYPitch);
srcLine = src;
dstLine = dst;
y = height;
while (y--) {
srcPix = srcLine;
dstPix = dstLine;
x = width;
while (x--) {
*((Uint16 *) dstPix) = *((Uint16 *) srcPix);
dstPix += dstXPitch;
srcPix += srcXPitch;
}
srcLine += srcYPitch;
dstLine += dstYPitch;
}
}
}
static int
GAPI_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * srcrect, const SDL_Rect * dstrect)
{
GAPI_RenderData *data = (GAPI_RenderData *) renderer->driverdata;
int bpp;
int bytespp;
int status;
Uint32 Rmask, Gmask, Bmask, Amask;
if (texture->format != data->format) {
SDL_SetError("Gapi got wrong texture");
return -1;
}
GAPI_LOG("GAPI_RenderCopy\n");
if (data->usageFlags & USAGE_GX_FUNCS) {
char *buffer;
buffer = gx.GXBeginDraw();
if (!(data->usageFlags & USAGE_DATA_PTR_CONSTANT)) {
data->data = buffer;
}
}
GAPI_LOG("GAPI_RenderCopy blit\n");
/* If our framebuffer has an xPitch which matches the pixelsize, we
can convert the framebuffer to a SDL_surface and blit there,
otherwise, we have to use our own blitting routine
*/
SDL_PixelFormatEnumToMasks(data->format, &bpp, &Rmask, &Gmask, &Bmask,
&Amask);
bytespp = bpp >> 3;
if (data->xPitch == bytespp && 0) {
SDL_Surface *screen =
SDL_CreateRGBSurfaceFrom(data->data, data->w, data->h,
bpp, data->yPitch, Rmask, Gmask, Bmask,
Amask);
status =
SDL_UpperBlit((SDL_Surface *) texture->driverdata, srcrect,
screen, dstrect);
SDL_FreeSurface(screen);
} else { /* screen is rotated, we have to blit on our own */
SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
char *src, *dst;
src = surface->pixels;
src += srcrect->y * surface->pitch + srcrect->x * 2;
dst = data->data + data->offset;
dst += dstrect->y * data->yPitch + dstrect->x * data->xPitch;
updateLine16to16(src, 2, surface->pitch,
dst, data->xPitch, data->yPitch,
srcrect->w, srcrect->h);
}
Uint32 ticks = SDL_GetTicks();
if (data->usageFlags & USAGE_GX_FUNCS) {
gx.GXEndDraw();
}
GAPI_LOG("GAPI_RenderCopy %i\n", SDL_GetTicks() - ticks);
return status;
}
static void
GAPI_RenderPresent(SDL_Renderer * renderer)
{
/* Nothing todo as we rendered directly to the screen on RenderCopy */
}
static void
GAPI_DestroyRenderer(SDL_Renderer * renderer)
{
GAPI_RenderData *data = (GAPI_RenderData *) renderer->driverdata;
if (data->usageFlags & USAGE_GX_FUNCS) {
gx.GXCloseDisplay();
}
if (data) {
SDL_free(data);
}
SDL_free(renderer);
}
#endif /* SDL_VIDEO_RENDER_GAPI */
/* vi: set ts=4 sw=4 expandtab: */