pandory500/SDL-mirror
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Implemented read/write pixels for the X11 renderer

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--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%404307
This commit is contained in:
Sam Lantinga 2009-12-14 06:52:17 +00:00
parent c2767e72dd
commit 1bd0c772d9
2 changed files with 71 additions and 0 deletions
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70
src/video/x11/SDL_x11render.c
View file

@ -58,6 +58,10 @@ static int X11_RenderRects(SDL_Renderer * renderer, const SDL_Rect ** rects,
int count);
static int X11_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * srcrect, const SDL_Rect * dstrect);
static int X11_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
Uint32 format, void * pixels, int pitch);
static int X11_RenderWritePixels(SDL_Renderer * renderer, const SDL_Rect * rect,
Uint32 format, const void * pixels, int pitch);
static void X11_RenderPresent(SDL_Renderer * renderer);
static void X11_DestroyTexture(SDL_Renderer * renderer,
SDL_Texture * texture);
@ -208,6 +212,8 @@ X11_CreateRenderer(SDL_Window * window, Uint32 flags)
renderer->RenderLines = X11_RenderLines;
renderer->RenderRects = X11_RenderRects;
renderer->RenderCopy = X11_RenderCopy;
renderer->RenderReadPixels = X11_RenderReadPixels;
renderer->RenderWritePixels = X11_RenderWritePixels;
renderer->RenderPresent = X11_RenderPresent;
renderer->DestroyTexture = X11_DestroyTexture;
renderer->DestroyRenderer = X11_DestroyRenderer;
@ -937,6 +943,70 @@ X11_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
return 0;
}
static int
X11_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
Uint32 format, void * pixels, int pitch)
{
X11_RenderData *data = (X11_RenderData *) renderer->driverdata;
SDL_Window *window = SDL_GetWindowFromID(renderer->window);
SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
Uint32 screen_format = display->current_mode.format;
XImage *image;
image = XGetImage(data->display, data->drawable, rect->x, rect->y,
rect->w, rect->h, AllPlanes, ZPixmap);
SDL_ConvertPixels(rect->w, rect->h,
screen_format, image->data, image->bytes_per_line,
format, pixels, pitch);
XDestroyImage(image);
return 0;
}
static int
X11_RenderWritePixels(SDL_Renderer * renderer, const SDL_Rect * rect,
Uint32 format, const void * pixels, int pitch)
{
X11_RenderData *data = (X11_RenderData *) renderer->driverdata;
SDL_Window *window = SDL_GetWindowFromID(renderer->window);
SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
Uint32 screen_format = display->current_mode.format;
XImage *image;
void *image_pixels;
int image_pitch;
image_pitch = rect->w * SDL_BYTESPERPIXEL(screen_format);
image_pixels = SDL_malloc(rect->h * image_pitch);
if (!image_pixels) {
SDL_OutOfMemory();
return -1;
}
image = XCreateImage(data->display, data->visual,
data->depth, ZPixmap, 0, image_pixels,
rect->w, rect->h,
SDL_BYTESPERPIXEL(screen_format) * 8,
image_pitch);
if (!image) {
SDL_SetError("XCreateImage() failed");
return -1;
}
SDL_ConvertPixels(rect->w, rect->h,
format, pixels, pitch,
screen_format, image->data, image->bytes_per_line);
XPutImage(data->display, data->drawable, data->gc,
image, 0, 0, rect->x, rect->y, rect->w, rect->h);
image->data = NULL;
XDestroyImage(image);
SDL_free(image_pixels);
return 0;
}
static void
X11_RenderPresent(SDL_Renderer * renderer)
{

1
src/video/x11/SDL_x11sym.h
View file

@ -63,6 +63,7 @@ SDL_X11_SYM(int,XFreeGC,(Display* a,GC b),(a,b),return)
SDL_X11_SYM(int,XFreeModifiermap,(XModifierKeymap* a),(a),return)
SDL_X11_SYM(int,XFreePixmap,(Display* a,Pixmap b),(a,b),return)
SDL_X11_SYM(int,XGetErrorDatabaseText,(Display* a,_Xconst char* b,_Xconst char* c,_Xconst char* d,char* e,int f),(a,b,c,d,e,f),return)
SDL_X11_SYM(XImage*,XGetImage,(Display* a,Drawable b,int c,int d,unsigned int e,unsigned int f,unsigned long g, int h),(a,b,c,d,e,f,g,h),return)
SDL_X11_SYM(XModifierKeymap*,XGetModifierMapping,(Display* a),(a),return)
SDL_X11_SYM(int,XGetPointerControl,(Display* a,int* b,int* c,int* d),(a,b,c,d),return)
SDL_X11_SYM(int,XGetRGBColormaps,(Display* a,Window b,XStandardColormap **c,int *d,Atom e),(a,b,c,d,e),return)