--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/video/nds/SDL_ndsrender.c	Tue Jun 10 06:57:57 2008 +0000
@@ -0,0 +1,285 @@
+/*
+    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 <nds.h>
+
+#include "SDL_config.h"
+
+#include "SDL_video.h"
+#include "../SDL_sysvideo.h"
+#include "../SDL_yuv_sw_c.h"
+#include "../SDL_renderer_sw.h"
+
+
+/* SDL surface based renderer implementation */
+
+static SDL_Renderer *SDL_NDS_CreateRenderer(SDL_Window * window,
+                                              Uint32 flags);
+static int SDL_NDS_RenderFill(SDL_Renderer * renderer, Uint8 r, Uint8 g,
+                                Uint8 b, Uint8 a, const SDL_Rect * rect);
+static int SDL_NDS_RenderCopy(SDL_Renderer * renderer,
+                                SDL_Texture * texture,
+                                const SDL_Rect * srcrect,
+                                const SDL_Rect * dstrect);
+static void SDL_NDS_RenderPresent(SDL_Renderer * renderer);
+static void SDL_NDS_DestroyRenderer(SDL_Renderer * renderer);
+
+
+SDL_RenderDriver SDL_NDS_RenderDriver = {
+    SDL_NDS_CreateRenderer,
+    { "nds",  SDL_RENDERER_PRESENTCOPY }
+/*   (SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTCOPY |
+      SDL_RENDERER_PRESENTFLIP2 | SDL_RENDERER_PRESENTFLIP3 |
+      SDL_RENDERER_PRESENTDISCARD),*/
+};
+
+typedef struct
+{
+    int current_screen;
+    SDL_Surface *screens[3];
+    int ultimate_answer;
+} SDL_NDS_RenderData;
+
+SDL_Renderer *
+SDL_NDS_CreateRenderer(SDL_Window * window, Uint32 flags)
+{
+    SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
+    SDL_DisplayMode *displayMode = &display->current_mode;
+    SDL_Renderer *renderer;
+    SDL_NDS_RenderData *data;
+    int i, n;
+    int bpp = 16;
+    Uint32 Rmask = 0x7C00, Gmask = 0x03E0, Bmask = 0x001F, Amask = 0x8000;
+
+    printf("SDL_NDS_CreateRenderer(window, 0x%x)\n", flags);
+    printf(" window: (%d,%d), %dx%d\n", window->x, window->y, window->w, window->h);
+
+    /* hard coded this to ARGB1555 for now
+    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 = (SDL_NDS_RenderData *) SDL_malloc(sizeof(*data));
+    if (!data) {
+        SDL_NDS_DestroyRenderer(renderer);
+        SDL_OutOfMemory();
+        return NULL;
+    }
+    SDL_zerop(data);
+
+    renderer->RenderFill = SDL_NDS_RenderFill;
+    renderer->RenderCopy = SDL_NDS_RenderCopy;
+    renderer->RenderPresent = SDL_NDS_RenderPresent;
+    renderer->DestroyRenderer = SDL_NDS_DestroyRenderer;
+    renderer->info.name = SDL_NDS_RenderDriver.info.name;
+    renderer->info.flags = 0;
+    renderer->window = window->id;
+    renderer->driverdata = data;
+    Setup_SoftwareRenderer(renderer);
+
+    if (flags & SDL_RENDERER_PRESENTFLIP2) {
+        renderer->info.flags |= SDL_RENDERER_PRESENTFLIP2;
+        n = 2;
+    } else if (flags & SDL_RENDERER_PRESENTFLIP3) {
+        renderer->info.flags |= SDL_RENDERER_PRESENTFLIP3;
+        n = 3;
+    } else {
+        renderer->info.flags |= SDL_RENDERER_PRESENTCOPY;
+        n = 1;
+    }
+    for (i = 0; i < n; ++i) {
+        data->screens[i] =
+            SDL_CreateRGBSurface(0, 256, 192, bpp, Rmask, Gmask, Bmask, Amask);
+        if (!data->screens[i]) {
+            SDL_NDS_DestroyRenderer(renderer);
+            return NULL;
+        }
+        SDL_SetSurfacePalette(data->screens[i], display->palette);
+    }
+
+    data->current_screen = 0;
+    data->ultimate_answer = 42;
+#if 0
+#define blarg (data->screens[0])
+    printf("hello?\n");
+    if(!data || !(data->screens) || !blarg) {
+        printf("they're null.\n");
+    } else {
+        printf("not null.\n");
+        printf("%d\n%d\n%d\n%d\n%x\n%x\n%x\n%x\n",
+        blarg->w, blarg->h, blarg->pitch,
+        blarg->format->BitsPerPixel,
+        blarg->format->Rmask,
+        blarg->format->Gmask,
+        blarg->format->Bmask,
+        (u32)(blarg->pixels)); /* ARGH WHY DOESN'T THIS PRINT AT ALL? */
+        printf("hurr\n");
+    }
+#undef blarg
+#endif
+    return renderer;
+}
+
+static int
+SDL_NDS_RenderFill(SDL_Renderer * renderer, Uint8 r, Uint8 g, Uint8 b,
+                     Uint8 a, const SDL_Rect * rect)
+{
+    SDL_NDS_RenderData *data = (SDL_NDS_RenderData *) renderer->driverdata;
+    SDL_Surface *target = data->screens[data->current_screen];
+    Uint32 color;
+    SDL_Rect real_rect = *rect;
+
+    color = SDL_MapRGBA(target->format, r, g, b, a);
+
+    return SDL_FillRect(target, &real_rect, color);
+}
+
+/* this is mainly for testing stuff to put a surface where I can see it */
+void sdlds_surf2vram(SDL_Surface *s) {
+    int i;
+    for(i = 0; i < 256*192; ++i) {
+        ((u16*)VRAM_A)[i] = ((u16*)(s->pixels))[i];
+    }
+}
+
+static int
+SDL_NDS_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
+                     const SDL_Rect * srcrect, const SDL_Rect * dstrect)
+{
+    SDL_NDS_RenderData *data =
+        (SDL_NDS_RenderData *) renderer->driverdata;
+    SDL_Window *window = SDL_GetWindowFromID(renderer->window);
+    SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
+    printf("SDL_NDS_RenderCopy(renderer, texture, srcrect, dstrect)\n");
+    printf(" renderer: %s\n", renderer->info.name);
+    printf(" texture: %dx%d\n", texture->w, texture->h);
+    printf(" srcrect: (%d,%d), %dx%d\n", srcrect->x, srcrect->y, srcrect->w, srcrect->h);
+    printf(" dstrect: (%d,%d), %dx%d\n", dstrect->x, dstrect->y, dstrect->w, dstrect->h);
+
+    if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
+        SDL_Surface *target = data->screens[data->current_screen];
+        void *pixels =
+            (Uint8 *) target->pixels + dstrect->y * target->pitch +
+            dstrect->x * target->format->BytesPerPixel;
+        return SDL_SW_CopyYUVToRGB((SDL_SW_YUVTexture *) texture->driverdata,
+                                   srcrect, display->current_mode.format,
+                                   dstrect->w, dstrect->h, pixels,
+                                   target->pitch);
+    } else {
+        SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
+        SDL_Surface *target = data->screens[data->current_screen];
+        SDL_Rect real_srcrect = *srcrect;
+        SDL_Rect real_dstrect = *dstrect;
+        printf("Rmask %x Gmask %x Bmask %x Amask %x\n"
+               "width %d, height %d, pitch %d\nbpp %d, pixels %x\n",
+            surface->format->Rmask, surface->format->Gmask,
+            surface->format->Bmask, surface->format->Amask,
+            surface->w, surface->h, surface->pitch,
+            surface->format->BitsPerPixel, (u32)(surface->pixels));
+        sdlds_surf2vram(surface);
+        return SDL_LowerBlit(surface, &real_srcrect, target, &real_dstrect);
+    }
+#if 0
+/* previous attempt to copy it directly to vram */
+        SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
+        int sx = srcrect->x, sy = srcrect->y, sw = srcrect->w, sh = srcrect->h;
+        int dx = dstrect->x, dy = dstrect->y, dw = dstrect->w, dh = dstrect->h;
+        int si,sj, di,dj;
+        /*printf("DEBUG: still alive!\n");*/
+        for(sj=0, dj=0; sj<sh && dj<dh; ++sj, ++dj) {
+            for(si=0, di=0; si<sw && di<dw; ++si, ++di) {
+                ((uint16*)VRAM_A)[(dj+dy)*256 + di+dx]
+                 = ((Uint16*)surface->pixels)[(sj+sy)*(surface->w) + si+sx];
+            }
+        }
+        /*printf("DEBUG: still alive!\n");*/
+    }
+    return 0;
+#endif
+}
+
+static void
+SDL_NDS_RenderPresent(SDL_Renderer * renderer)
+{
+    SDL_NDS_RenderData *data =
+        (SDL_NDS_RenderData *) renderer->driverdata;
+
+    printf("SDL_NDS_RenderPresent(renderer)\n");
+    printf(" renderer: %s\n", renderer->info.name);
+    /* Send the data to the display */
+
+#if 0
+/*testing to see if rectangles drawn get copied right*/
+    {
+    SDL_Rect ra;
+  	ra.x=0; ra.y=0; ra.w=256; ra.h=192;
+	SDL_FillRect(data->screens[data->current_screen], &ra, 0x250);
+	ra.x=32; ra.y=32; ra.w=192; ra.h=128;
+	SDL_FillRect(data->screens[data->current_screen], &ra,
+	    SDL_MapRGBA(data->screens[data->current_screen]->format,
+	    255,255,255,255));
+	}
+/*okay so this works but why not when I do it in the main()?
+  for some reason the screen I get from screen=SDL_SetVideoMode(...)
+  doesn't get copied to renderer->driverdata? */
+    for(i = 0; i < 30; ++i) swiWaitForVBlank(); /* delay for debug purpose */
+#endif
+    sdlds_surf2vram(data->screens[data->current_screen]);
+
+    /* Update the flipping chain, if any */
+    if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP2) {
+        data->current_screen = (data->current_screen + 1) % 2;
+    } else if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP3) {
+        data->current_screen = (data->current_screen + 1) % 3;
+    }
+}
+
+static void
+SDL_NDS_DestroyRenderer(SDL_Renderer * renderer)
+{
+    SDL_NDS_RenderData *data = (SDL_NDS_RenderData *) renderer->driverdata;
+    int i;
+
+    printf("SDL_NDS_DestroyRenderer(renderer)\n");
+    printf(" renderer: %s\n", renderer->info.name);
+    if (data) {
+        for (i = 0; i < SDL_arraysize(data->screens); ++i) {
+            if (data->screens[i]) {
+                SDL_FreeSurface(data->screens[i]);
+            }
+        }
+        SDL_free(data);
+    }
+    SDL_free(renderer);
+}
+
+/* vi: set ts=4 sw=4 expandtab: */