Added new style dummy renderer

libsdl-org · Jun 13, 2006 · 2d8857c · 2d8857c
1 parent 463bcff
commit 2d8857c
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Showing 6 changed files with 207 additions and 45 deletions.
diff --git a/src/video/SDL_sysvideo.h b/src/video/SDL_sysvideo.h
@@ -427,8 +427,8 @@ extern VideoBootStrap glSDL_bootstrap;
 #define SDL_CurrentWindow	(SDL_CurrentDisplay.windows[0])
 
 extern SDL_VideoDevice *SDL_GetVideoDevice();
-extern void SDL_AddBasicVideoDisplay(const SDL_DisplayMode * desktop_mode);
-extern void SDL_AddVideoDisplay(const SDL_VideoDisplay * display);
+extern int SDL_AddBasicVideoDisplay(const SDL_DisplayMode * desktop_mode);
+extern int SDL_AddVideoDisplay(const SDL_VideoDisplay * display);
 extern void SDL_AddDisplayMode(int displayIndex,
                                const SDL_DisplayMode * mode);
 extern void SDL_AddRenderDriver(int displayIndex,

diff --git a/src/video/SDL_video.c b/src/video/SDL_video.c
@@ -307,7 +307,7 @@ SDL_GetVideoDevice()
     return _this;
 }
 
-void
+int
 SDL_AddBasicVideoDisplay(const SDL_DisplayMode * desktop_mode)
 {
     SDL_VideoDisplay display;
@@ -318,22 +318,26 @@ SDL_AddBasicVideoDisplay(const SDL_DisplayMode * desktop_mode)
     }
     display.current_mode = display.desktop_mode;
 
-    SDL_AddVideoDisplay(&display);
+    return SDL_AddVideoDisplay(&display);
 }
 
-void
+int
 SDL_AddVideoDisplay(const SDL_VideoDisplay * display)
 {
     SDL_VideoDisplay *displays;
+    int index = -1;
 
     displays =
         SDL_realloc(_this->displays,
                     (_this->num_displays + 1) * sizeof(*displays));
     if (displays) {
-        displays[_this->num_displays] = *display;
+        index = _this->num_displays++;
+        displays[index] = *display;
         _this->displays = displays;
-        _this->num_displays++;
+    } else {
+        SDL_OutOfMemory();
     }
+    return index;
 }
 
 int

diff --git a/src/video/dummy/SDL_nullmouse.c b/src/video/dummy/SDL_nullmouse.c
diff --git a/src/video/dummy/SDL_nullrender.c b/src/video/dummy/SDL_nullrender.c
@@ -0,0 +1,191 @@
+/*
+    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 "SDL_config.h"
+
+#include "SDL_video.h"
+#include "../SDL_sysvideo.h"
+
+
+/* SDL surface based renderer implementation */
+
+static SDL_Renderer *SDL_DUMMY_CreateRenderer(SDL_Window * window,
+                                              Uint32 flags);
+static int SDL_DUMMY_CreateTexture(SDL_Renderer * renderer,
+                                   SDL_Texture * texture);
+static int SDL_DUMMY_RenderReadPixels(SDL_Renderer * renderer,
+                                      SDL_Rect * rect, void *pixels,
+                                      int pitch);
+static int SDL_DUMMY_RenderWritePixels(SDL_Renderer * renderer,
+                                       SDL_Rect * rect, const void *pixels,
+                                       int pitch);
+static void SDL_DUMMY_RenderPresent(SDL_Renderer * renderer);
+static void SDL_DUMMY_DestroyRenderer(SDL_Renderer * renderer);
+
+
+SDL_RenderDriver SDL_DUMMY_RenderDriver = {
+    SDL_DUMMY_CreateRenderer,
+    {
+     "minimal",
+     (SDL_Renderer_Minimal | SDL_Renderer_PresentCopy),
+     SDL_TextureBlendMode_None,
+     SDL_TextureScaleMode_None,
+     0,
+     {},
+     0,
+     0}
+};
+
+typedef struct
+{
+    SDL_Surface *screen;
+} SDL_DUMMY_RenderData;
+
+SDL_Renderer *
+SDL_DUMMY_CreateRenderer(SDL_Window * window, Uint32 flags)
+{
+    SDL_DisplayMode *displayMode = &window->display->current_mode;
+    SDL_Renderer *renderer;
+    SDL_DUMMY_RenderData *data;
+    int i, n;
+    int bpp;
+    Uint32 Rmask, Gmask, Bmask, Amask;
+
+    if (!SDL_PixelFormatEnumToMasks
+        (displayMode->format, &bpp, &Rmask, &Gmask, &Bmask, &Amask)) {
+        SDL_SetError("Unknown display format");
+        return NULL;
+    }
+
+    renderer = (SDL_Renderer *) SDL_malloc(sizeof(*renderer));
+    if (!renderer) {
+        SDL_OutOfMemory();
+        return NULL;
+    }
+    SDL_zerop(renderer);
+
+    data = (SDL_DUMMY_RenderData *) SDL_malloc(sizeof(*data));
+    if (!data) {
+        SDL_DUMMY_DestroyRenderer(renderer);
+        SDL_OutOfMemory();
+        return NULL;
+    }
+    SDL_zerop(data);
+
+    renderer->RenderReadPixels = SDL_DUMMY_RenderReadPixels;
+    renderer->RenderWritePixels = SDL_DUMMY_RenderWritePixels;
+    renderer->RenderPresent = SDL_DUMMY_RenderPresent;
+    renderer->DestroyRenderer = SDL_DUMMY_DestroyRenderer;
+    renderer->info = SDL_DUMMY_RenderDriver.info;
+    renderer->window = window;
+    renderer->driverdata = data;
+
+    data->screen =
+        SDL_CreateRGBSurface(0, window->w, window->h, bpp, Rmask, Gmask,
+                             Bmask, Amask);
+    if (!data->screen) {
+        SDL_DUMMY_DestroyRenderer(renderer);
+        return NULL;
+    }
+
+    return renderer;
+}
+
+int
+SDL_DUMMY_RenderReadPixels(SDL_Renderer * renderer, SDL_Rect * rect,
+                           void *pixels, int pitch)
+{
+    SDL_DUMMY_RenderData *data =
+        (SDL_DUMMY_RenderData *) renderer->driverdata;
+    SDL_Surface *surface = data->screen;
+    Uint8 *src, *dst;
+    int row;
+    size_t length;
+
+    src =
+        (Uint8 *) surface->pixels + rect->y * surface->pitch +
+        rect->x * surface->format->BytesPerPixel;
+    dst = (Uint8 *) pixels;
+    length = rect->w * surface->format->BytesPerPixel;
+    for (row = 0; row < rect->h; ++row) {
+        SDL_memcpy(dst, src, length);
+        src += surface->pitch;
+        dst += pitch;
+    }
+    return 0;
+}
+
+int
+SDL_DUMMY_RenderWritePixels(SDL_Renderer * renderer, SDL_Rect * rect,
+                            const void *pixels, int pitch)
+{
+    SDL_DUMMY_RenderData *data =
+        (SDL_DUMMY_RenderData *) renderer->driverdata;
+    SDL_Surface *surface = data->screen;
+    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;
+}
+
+void
+SDL_DUMMY_RenderPresent(SDL_Renderer * renderer)
+{
+    static int frame_number;
+    SDL_DUMMY_RenderData *data =
+        (SDL_DUMMY_RenderData *) renderer->driverdata;
+    SDL_Surface *surface = data->screen;
+
+    if (SDL_getenv("SDL_VIDEO_DUMMY_SAVE_FRAMES")) {
+        char file[128];
+        SDL_snprintf(file, sizeof(file), "SDL_screen-%8.8d.bmp",
+                     ++frame_number);
+        SDL_SaveBMP(surface, file);
+    }
+}
+
+void
+SDL_DUMMY_DestroyRenderer(SDL_Renderer * renderer)
+{
+    SDL_DUMMY_RenderData *data =
+        (SDL_DUMMY_RenderData *) renderer->driverdata;
+
+    if (data) {
+        if (data->screen) {
+            SDL_FreeSurface(data->screen);
+        }
+        SDL_free(data);
+    }
+    SDL_free(renderer);
+}
+
+/* vi: set ts=4 sw=4 expandtab: */
diff --git a/src/video/dummy/SDL_nullmouse_c.h → src/video/dummy/SDL_nullrender_c.h b/src/video/dummy/SDL_nullmouse_c.h → src/video/dummy/SDL_nullrender_c.h
@@ -21,7 +21,8 @@
 */
 #include "SDL_config.h"
 
-#include "SDL_nullvideo.h"
+/* SDL surface based renderer implementation */
+
+extern SDL_RenderDriver SDL_DUMMY_RenderDriver;
 
-/* Functions to be exported */
 /* vi: set ts=4 sw=4 expandtab: */
diff --git a/src/video/dummy/SDL_nullvideo.c b/src/video/dummy/SDL_nullvideo.c
@@ -44,7 +44,7 @@
 
 #include "SDL_nullvideo.h"
 #include "SDL_nullevents_c.h"
-#include "SDL_nullmouse_c.h"
+#include "SDL_nullrender_c.h"
 
 #define DUMMYVID_DRIVER_NAME "dummy"
 
@@ -121,6 +121,7 @@ DUMMY_VideoInit(_THIS)
     SDL_DisplayMode mode;
 
     SDL_AddBasicVideoDisplay(NULL);
+    SDL_AddRenderDriver(0, &SDL_DUMMY_RenderDriver);
 
     SDL_zero(mode);
     SDL_AddDisplayMode(0, &mode);