--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/render/software/SDL_render_sw.c	Sat Feb 05 12:01:11 2011 -0800
@@ -0,0 +1,418 @@
+/*
+    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
+*/
+#include "SDL_config.h"
+
+#include "../SDL_sysrender.h"
+#include "../../video/SDL_pixels_c.h"
+
+#include "SDL_draw.h"
+#include "SDL_blendfillrect.h"
+#include "SDL_blendline.h"
+#include "SDL_blendpoint.h"
+#include "SDL_drawline.h"
+#include "SDL_drawpoint.h"
+
+
+/* SDL surface based renderer implementation */
+
+static SDL_Renderer *SW_CreateRenderer(SDL_Window * window, Uint32 flags);
+static void SW_WindowEvent(SDL_Renderer * renderer,
+                           const SDL_WindowEvent *event);
+static int SW_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture);
+static int SW_SetTextureColorMod(SDL_Renderer * renderer,
+                                 SDL_Texture * texture);
+static int SW_SetTextureAlphaMod(SDL_Renderer * renderer,
+                                 SDL_Texture * texture);
+static int SW_SetTextureBlendMode(SDL_Renderer * renderer,
+                                  SDL_Texture * texture);
+static int SW_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
+                            const SDL_Rect * rect, const void *pixels,
+                            int pitch);
+static int SW_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
+                          const SDL_Rect * rect, void **pixels, int *pitch);
+static void SW_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture);
+static int SW_RenderDrawPoints(SDL_Renderer * renderer,
+                               const SDL_Point * points, int count);
+static int SW_RenderDrawLines(SDL_Renderer * renderer,
+                              const SDL_Point * points, int count);
+static int SW_RenderFillRects(SDL_Renderer * renderer,
+                              const SDL_Rect ** rects, int count);
+static int SW_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
+                         const SDL_Rect * srcrect, const SDL_Rect * dstrect);
+static int SW_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
+                               Uint32 format, void * pixels, int pitch);
+static void SW_RenderPresent(SDL_Renderer * renderer);
+static void SW_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture);
+static void SW_DestroyRenderer(SDL_Renderer * renderer);
+
+
+SDL_RenderDriver SW_RenderDriver = {
+    SW_CreateRenderer,
+    {
+     "software",
+     0,
+     8,
+     {
+      SDL_PIXELFORMAT_RGB555,
+      SDL_PIXELFORMAT_RGB565,
+      SDL_PIXELFORMAT_RGB888,
+      SDL_PIXELFORMAT_BGR888,
+      SDL_PIXELFORMAT_ARGB8888,
+      SDL_PIXELFORMAT_RGBA8888,
+      SDL_PIXELFORMAT_ABGR8888,
+      SDL_PIXELFORMAT_BGRA8888
+     },
+     0,
+     0}
+};
+
+typedef struct
+{
+    SDL_bool updateSize;
+    SDL_Surface *surface;
+} SW_RenderData;
+
+
+SDL_Renderer *
+SW_CreateRendererForSurface(SDL_Surface * surface)
+{
+    SDL_Renderer *renderer;
+    SW_RenderData *data;
+
+    if (!surface) {
+        SDL_SetError("Can't create renderer for NULL surface");
+        return NULL;
+    }
+
+    renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
+    if (!renderer) {
+        SDL_OutOfMemory();
+        return NULL;
+    }
+
+    data = (SW_RenderData *) SDL_calloc(1, sizeof(*data));
+    if (!data) {
+        SW_DestroyRenderer(renderer);
+        SDL_OutOfMemory();
+        return NULL;
+    }
+    data->surface = surface;
+
+    renderer->WindowEvent = SW_WindowEvent;
+    renderer->CreateTexture = SW_CreateTexture;
+    renderer->SetTextureColorMod = SW_SetTextureColorMod;
+    renderer->SetTextureAlphaMod = SW_SetTextureAlphaMod;
+    renderer->SetTextureBlendMode = SW_SetTextureBlendMode;
+    renderer->UpdateTexture = SW_UpdateTexture;
+    renderer->LockTexture = SW_LockTexture;
+    renderer->UnlockTexture = SW_UnlockTexture;
+    renderer->DestroyTexture = SW_DestroyTexture;
+    renderer->RenderDrawPoints = SW_RenderDrawPoints;
+    renderer->RenderDrawLines = SW_RenderDrawLines;
+    renderer->RenderFillRects = SW_RenderFillRects;
+    renderer->RenderCopy = SW_RenderCopy;
+    renderer->RenderReadPixels = SW_RenderReadPixels;
+    renderer->RenderPresent = SW_RenderPresent;
+    renderer->DestroyRenderer = SW_DestroyRenderer;
+    renderer->info = SW_RenderDriver.info;
+    renderer->driverdata = data;
+
+    return renderer;
+}
+
+SDL_Renderer *
+SW_CreateRenderer(SDL_Window * window, Uint32 flags)
+{
+    SDL_Surface *surface;
+
+    surface = SDL_GetWindowSurface(window);
+    if (!surface) {
+        return NULL;
+    }
+    return SW_CreateRendererForSurface(surface);
+}
+
+static SDL_Surface *
+SW_ActivateRenderer(SDL_Renderer * renderer)
+{
+    SW_RenderData *data = (SW_RenderData *) renderer->driverdata;
+    SDL_Window *window = renderer->window;
+
+    if (data->updateSize) {
+        data->surface = SDL_GetWindowSurface(window);
+        data->updateSize = SDL_FALSE;
+    }
+    return data->surface;
+}
+
+static void
+SW_WindowEvent(SDL_Renderer * renderer, const SDL_WindowEvent *event)
+{
+    SW_RenderData *data = (SW_RenderData *) renderer->driverdata;
+
+    if (event->event == SDL_WINDOWEVENT_RESIZED) {
+        data->updateSize = SDL_TRUE;
+    }
+}
+
+static int
+SW_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
+{
+    int bpp;
+    Uint32 Rmask, Gmask, Bmask, Amask;
+
+    if (!SDL_PixelFormatEnumToMasks
+        (texture->format, &bpp, &Rmask, &Gmask, &Bmask, &Amask)) {
+        SDL_SetError("Unknown texture format");
+        return -1;
+    }
+
+    texture->driverdata =
+        SDL_CreateRGBSurface(0, texture->w, texture->h, bpp, Rmask, Gmask,
+                             Bmask, Amask);
+    SDL_SetSurfaceColorMod(texture->driverdata, texture->r, texture->g,
+                           texture->b);
+    SDL_SetSurfaceAlphaMod(texture->driverdata, texture->a);
+    SDL_SetSurfaceBlendMode(texture->driverdata, texture->blendMode);
+
+    if (texture->access == SDL_TEXTUREACCESS_STATIC) {
+        SDL_SetSurfaceRLE(texture->driverdata, 1);
+    }
+
+    if (!texture->driverdata) {
+        return -1;
+    }
+    return 0;
+}
+
+static int
+SW_SetTextureColorMod(SDL_Renderer * renderer, SDL_Texture * texture)
+{
+    SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
+    return SDL_SetSurfaceColorMod(surface, texture->r, texture->g,
+                                  texture->b);
+}
+
+static int
+SW_SetTextureAlphaMod(SDL_Renderer * renderer, SDL_Texture * texture)
+{
+    SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
+    return SDL_SetSurfaceAlphaMod(surface, texture->a);
+}
+
+static int
+SW_SetTextureBlendMode(SDL_Renderer * renderer, SDL_Texture * texture)
+{
+    SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
+    return SDL_SetSurfaceBlendMode(surface, texture->blendMode);
+}
+
+static int
+SW_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
+                 const SDL_Rect * rect, const void *pixels, int pitch)
+{
+    SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
+    Uint8 *src, *dst;
+    int row;
+    size_t length;
+
+    src = (Uint8 *) pixels;
+    dst = (Uint8 *) surface->pixels +
+                        rect->y * surface->pitch +
+                        rect->x * surface->format->BytesPerPixel;
+    length = rect->w * surface->format->BytesPerPixel;
+    for (row = 0; row < rect->h; ++row) {
+        SDL_memcpy(dst, src, length);
+        src += pitch;
+        dst += surface->pitch;
+    }
+    return 0;
+}
+
+static int
+SW_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
+               const SDL_Rect * rect, void **pixels, int *pitch)
+{
+    SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
+
+    *pixels =
+        (void *) ((Uint8 *) surface->pixels + rect->y * surface->pitch +
+                  rect->x * surface->format->BytesPerPixel);
+    *pitch = surface->pitch;
+    return 0;
+}
+
+static void
+SW_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture)
+{
+}
+
+static int
+SW_RenderDrawPoints(SDL_Renderer * renderer, const SDL_Point * points,
+                    int count)
+{
+    SDL_Surface *surface = SW_ActivateRenderer(renderer);
+
+    if (!surface) {
+        return -1;
+    }
+
+    /* Draw the points! */
+    if (renderer->blendMode == SDL_BLENDMODE_NONE) {
+        Uint32 color = SDL_MapRGBA(surface->format,
+                                   renderer->r, renderer->g, renderer->b,
+                                   renderer->a);
+
+        return SDL_DrawPoints(surface, points, count, color);
+    } else {
+        return SDL_BlendPoints(surface, points, count,
+                               renderer->blendMode,
+                               renderer->r, renderer->g, renderer->b,
+                               renderer->a);
+    }
+}
+
+static int
+SW_RenderDrawLines(SDL_Renderer * renderer, const SDL_Point * points,
+                   int count)
+{
+    SDL_Surface *surface = SW_ActivateRenderer(renderer);
+
+    if (!surface) {
+        return -1;
+    }
+
+    /* Draw the lines! */
+    if (renderer->blendMode == SDL_BLENDMODE_NONE) {
+        Uint32 color = SDL_MapRGBA(surface->format,
+                                   renderer->r, renderer->g, renderer->b,
+                                   renderer->a);
+
+        return SDL_DrawLines(surface, points, count, color);
+    } else {
+        return SDL_BlendLines(surface, points, count,
+                              renderer->blendMode,
+                              renderer->r, renderer->g, renderer->b,
+                              renderer->a);
+    }
+}
+
+static int
+SW_RenderFillRects(SDL_Renderer * renderer, const SDL_Rect ** rects,
+                   int count)
+{
+    SDL_Surface *surface = SW_ActivateRenderer(renderer);
+
+    if (!surface) {
+        return -1;
+    }
+
+    if (renderer->blendMode == SDL_BLENDMODE_NONE) {
+        Uint32 color = SDL_MapRGBA(surface->format,
+                                   renderer->r, renderer->g, renderer->b,
+                                   renderer->a);
+        return SDL_FillRects(surface, rects, count, color);
+    } else {
+        return SDL_BlendFillRects(surface, rects, count,
+                                     renderer->blendMode,
+                                     renderer->r, renderer->g, renderer->b,
+                                     renderer->a);
+    }
+}
+
+static int
+SW_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
+              const SDL_Rect * srcrect, const SDL_Rect * dstrect)
+{
+    SDL_Surface *surface = SW_ActivateRenderer(renderer);
+    SDL_Surface *src = (SDL_Surface *) texture->driverdata;
+    SDL_Rect final_rect = *dstrect;
+
+    if (!surface) {
+        return -1;
+    }
+    return SDL_BlitSurface(src, srcrect, surface, &final_rect);
+}
+
+static int
+SW_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
+                    Uint32 format, void * pixels, int pitch)
+{
+    SDL_Surface *surface = SW_ActivateRenderer(renderer);
+    Uint32 src_format;
+    void *src_pixels;
+
+    if (!surface) {
+        return -1;
+    }
+
+    if (rect->x < 0 || rect->x+rect->w > surface->w ||
+        rect->y < 0 || rect->y+rect->h > surface->h) {
+        SDL_SetError("Tried to read outside of surface bounds");
+        return -1;
+    }
+
+    src_format = SDL_MasksToPixelFormatEnum(
+                    surface->format->BitsPerPixel,
+                    surface->format->Rmask, surface->format->Gmask,
+                    surface->format->Bmask, surface->format->Amask);
+
+    src_pixels = (void*)((Uint8 *) surface->pixels +
+                    rect->y * surface->pitch +
+                    rect->x * surface->format->BytesPerPixel);
+
+    return SDL_ConvertPixels(rect->w, rect->h,
+                             src_format, src_pixels, surface->pitch,
+                             format, pixels, pitch);
+}
+
+static void
+SW_RenderPresent(SDL_Renderer * renderer)
+{
+    SW_RenderData *data = (SW_RenderData *) renderer->driverdata;
+    SDL_Window *window = renderer->window;
+
+    if (window) {
+        SDL_UpdateWindowSurface(window);
+    }
+}
+
+static void
+SW_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture)
+{
+    SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
+
+    SDL_FreeSurface(surface);
+}
+
+static void
+SW_DestroyRenderer(SDL_Renderer * renderer)
+{
+    SW_RenderData *data = (SW_RenderData *) renderer->driverdata;
+
+    if (data) {
+        SDL_free(data);
+    }
+    SDL_free(renderer);
+}
+
+/* vi: set ts=4 sw=4 expandtab: */