Implemented fully featured dummy renderer
authorSam Lantinga <slouken@libsdl.org>
Sat, 15 Jul 2006 19:29:42 +0000
changeset 1908 e079dafea2bf
parent 1907 06c27a737b7a
child 1909 8f1ab2f7c722
Implemented fully featured dummy renderer
src/video/dummy/SDL_nullrender.c
--- a/src/video/dummy/SDL_nullrender.c	Sat Jul 15 09:46:36 2006 +0000
+++ b/src/video/dummy/SDL_nullrender.c	Sat Jul 15 19:29:42 2006 +0000
@@ -23,15 +23,52 @@
 
 #include "SDL_video.h"
 #include "../SDL_sysvideo.h"
+#include "../SDL_yuv_sw_c.h"
 
 
 /* SDL surface based renderer implementation */
 
-static SDL_Renderer *SDL_DUMMY_CreateRenderer(SDL_Window * window,
-                                              Uint32 flags);
+static SDL_Renderer *SDL_DUMMY_CreateRenderer(SDL_Window * window, Uint32 flags);
 static int SDL_DUMMY_CreateTexture(SDL_Renderer * renderer,
-                                   SDL_Texture * texture);
+                                SDL_Texture * texture);
+static int SDL_DUMMY_QueryTexturePixels(SDL_Renderer * renderer,
+                                     SDL_Texture * texture, void **pixels,
+                                     int *pitch);
+static int SDL_DUMMY_SetTexturePalette(SDL_Renderer * renderer,
+                                    SDL_Texture * texture,
+                                    const SDL_Color * colors, int firstcolor,
+                                    int ncolors);
+static int SDL_DUMMY_GetTexturePalette(SDL_Renderer * renderer,
+                                    SDL_Texture * texture, SDL_Color * colors,
+                                    int firstcolor, int ncolors);
+static int SDL_DUMMY_UpdateTexture(SDL_Renderer * renderer,
+                                SDL_Texture * texture, const SDL_Rect * rect,
+                                const void *pixels, int pitch);
+static int SDL_DUMMY_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
+                              const SDL_Rect * rect, int markDirty,
+                              void **pixels, int *pitch);
+static void SDL_DUMMY_UnlockTexture(SDL_Renderer * renderer,
+                                 SDL_Texture * texture);
+static void SDL_DUMMY_DirtyTexture(SDL_Renderer * renderer,
+                                SDL_Texture * texture, int numrects,
+                                const SDL_Rect * rects);
+static void SDL_DUMMY_SelectRenderTexture(SDL_Renderer * renderer,
+                                       SDL_Texture * texture);
+static int SDL_DUMMY_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect,
+                             Uint32 color);
+static int SDL_DUMMY_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
+                             const SDL_Rect * srcrect,
+                             const SDL_Rect * dstrect, int blendMode,
+                             int scaleMode);
+static int SDL_DUMMY_RenderReadPixels(SDL_Renderer * renderer,
+                                   const SDL_Rect * rect, void *pixels,
+                                   int pitch);
+static int SDL_DUMMY_RenderWritePixels(SDL_Renderer * renderer,
+                                    const SDL_Rect * rect, const void *pixels,
+                                    int pitch);
 static void SDL_DUMMY_RenderPresent(SDL_Renderer * renderer);
+static void SDL_DUMMY_DestroyTexture(SDL_Renderer * renderer,
+                                  SDL_Texture * texture);
 static void SDL_DUMMY_DestroyRenderer(SDL_Renderer * renderer);
 
 
@@ -39,18 +76,33 @@
     SDL_DUMMY_CreateRenderer,
     {
      "dummy",
-     (SDL_Renderer_PresentDiscard | SDL_Renderer_PresentCopy),
-     SDL_TextureBlendMode_None,
-     SDL_TextureScaleMode_None,
-     0,
-     {0},
+     (SDL_Renderer_SingleBuffer | SDL_Renderer_PresentCopy |
+      SDL_Renderer_PresentFlip2 | SDL_Renderer_PresentFlip3 |
+      SDL_Renderer_PresentDiscard),
+     (SDL_TextureBlendMode_None | SDL_TextureBlendMode_Mask |
+      SDL_TextureBlendMode_Blend),
+     (SDL_TextureScaleMode_None | SDL_TextureScaleMode_Fast),
+     11,
+     {
+      SDL_PixelFormat_Index8,
+      SDL_PixelFormat_RGB555,
+      SDL_PixelFormat_RGB565,
+      SDL_PixelFormat_RGB888,
+      SDL_PixelFormat_BGR888,
+      SDL_PixelFormat_ARGB8888,
+      SDL_PixelFormat_RGBA8888,
+      SDL_PixelFormat_ABGR8888,
+      SDL_PixelFormat_BGRA8888,
+      SDL_PixelFormat_YUY2,
+      SDL_PixelFormat_UYVY},
      0,
      0}
 };
 
 typedef struct
 {
-    SDL_Surface *surface;
+    int current_screen;
+    SDL_Surface *screens[3];
 } SDL_DUMMY_RenderData;
 
 SDL_Renderer *
@@ -60,6 +112,7 @@
     SDL_DisplayMode *displayMode = &display->current_mode;
     SDL_Renderer *renderer;
     SDL_DUMMY_RenderData *data;
+    int i, n;
     int bpp;
     Uint32 Rmask, Gmask, Bmask, Amask;
 
@@ -69,12 +122,11 @@
         return NULL;
     }
 
-    renderer = (SDL_Renderer *) SDL_malloc(sizeof(*renderer));
+    renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
     if (!renderer) {
         SDL_OutOfMemory();
         return NULL;
     }
-    SDL_zerop(renderer);
 
     data = (SDL_DUMMY_RenderData *) SDL_malloc(sizeof(*data));
     if (!data) {
@@ -84,50 +136,284 @@
     }
     SDL_zerop(data);
 
+    renderer->CreateTexture = SDL_DUMMY_CreateTexture;
+    renderer->QueryTexturePixels = SDL_DUMMY_QueryTexturePixels;
+    renderer->SetTexturePalette = SDL_DUMMY_SetTexturePalette;
+    renderer->GetTexturePalette = SDL_DUMMY_GetTexturePalette;
+    renderer->UpdateTexture = SDL_DUMMY_UpdateTexture;
+    renderer->LockTexture = SDL_DUMMY_LockTexture;
+    renderer->UnlockTexture = SDL_DUMMY_UnlockTexture;
+    renderer->DirtyTexture = SDL_DUMMY_DirtyTexture;
+    renderer->RenderFill = SDL_DUMMY_RenderFill;
+    renderer->RenderCopy = SDL_DUMMY_RenderCopy;
     renderer->RenderPresent = SDL_DUMMY_RenderPresent;
+    renderer->DestroyTexture = SDL_DUMMY_DestroyTexture;
     renderer->DestroyRenderer = SDL_DUMMY_DestroyRenderer;
     renderer->info = SDL_DUMMY_RenderDriver.info;
     renderer->window = window->id;
     renderer->driverdata = data;
 
-    data->surface =
-        SDL_CreateRGBSurface(0, window->w, window->h, bpp, Rmask, Gmask,
-                             Bmask, Amask);
-    if (!data->surface) {
-        SDL_DUMMY_DestroyRenderer(renderer);
-        return NULL;
+    renderer->info.flags = 0;
+
+    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;
     }
-    SDL_SetSurfacePalette(data->surface, display->palette);
+    for (i = 0; i < n; ++i) {
+        data->screens[i] =
+            SDL_CreateRGBSurface(0, window->w, window->h, bpp, Rmask, Gmask,
+                                 Bmask, Amask);
+        if (!data->screens[i]) {
+            SDL_DUMMY_DestroyRenderer(renderer);
+            return NULL;
+        }
+        SDL_SetSurfacePalette(data->screens[i], display->palette);
+    }
+    data->current_screen = 0;
 
     return renderer;
 }
 
-void
+static int
+SDL_DUMMY_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
+{
+    if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
+        texture->driverdata = SDL_SW_CreateYUVTexture(texture);
+    } else {
+        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);
+    }
+
+    if (!texture->driverdata) {
+        return -1;
+    }
+    return 0;
+}
+
+static int
+SDL_DUMMY_QueryTexturePixels(SDL_Renderer * renderer, SDL_Texture * texture,
+                          void **pixels, int *pitch)
+{
+    if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
+        return SDL_SW_QueryYUVTexturePixels((SDL_SW_YUVTexture *) texture->driverdata, pixels, pitch);
+    } else {
+        SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
+
+        *pixels = surface->pixels;
+        *pitch = surface->pitch;
+        return 0;
+    }
+}
+
+static int
+SDL_DUMMY_SetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
+                         const SDL_Color * colors, int firstcolor,
+                         int ncolors)
+{
+    if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
+        SDL_SetError("YUV textures don't have a palette");
+        return -1;
+    } else {
+        SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
+
+        return SDL_SetPaletteColors(surface->format->palette, colors,
+                                    firstcolor, ncolors);
+    }
+}
+
+static int
+SDL_DUMMY_GetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
+                         SDL_Color * colors, int firstcolor, int ncolors)
+{
+    if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
+        SDL_SetError("YUV textures don't have a palette");
+        return -1;
+    } else {
+        SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
+
+        SDL_memcpy(colors, &surface->format->palette->colors[firstcolor],
+                   ncolors * sizeof(*colors));
+        return 0;
+    }
+}
+
+static int
+SDL_DUMMY_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
+                     const SDL_Rect * rect, const void *pixels, int pitch)
+{
+    if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
+        return SDL_SW_UpdateYUVTexture((SDL_SW_YUVTexture *) texture->
+                                       driverdata, rect, pixels, pitch);
+    } else {
+        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
+SDL_DUMMY_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
+                   const SDL_Rect * rect, int markDirty, void **pixels,
+                   int *pitch)
+{
+    if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
+        return SDL_SW_LockYUVTexture((SDL_SW_YUVTexture *) texture->
+                                     driverdata, rect, markDirty, pixels,
+                                     pitch);
+    } else {
+        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
+SDL_DUMMY_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture)
+{
+    if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
+        SDL_SW_UnlockYUVTexture((SDL_SW_YUVTexture *) texture->driverdata);
+    }
+}
+
+static void
+SDL_DUMMY_DirtyTexture(SDL_Renderer * renderer, SDL_Texture * texture,
+                    int numrects, const SDL_Rect * rects)
+{
+}
+
+static int
+SDL_DUMMY_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect,
+                  Uint32 color)
+{
+    SDL_DUMMY_RenderData *data = (SDL_DUMMY_RenderData *) renderer->driverdata;
+    SDL_Surface *target = data->screens[data->current_screen];
+    SDL_Rect real_rect = *rect;
+    Uint8 r, g, b, a;
+
+    a = (Uint8) ((color >> 24) & 0xFF);
+    r = (Uint8) ((color >> 16) & 0xFF);
+    g = (Uint8) ((color >> 8) & 0xFF);
+    b = (Uint8) (color & 0xFF);
+    color = SDL_MapRGBA(target->format, r, g, b, a);
+
+    return SDL_FillRect(target, &real_rect, color);
+}
+
+static int
+SDL_DUMMY_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
+                  const SDL_Rect * srcrect, const SDL_Rect * dstrect,
+                  int blendMode, int scaleMode)
+{
+    SDL_DUMMY_RenderData *data = (SDL_DUMMY_RenderData *) renderer->driverdata;
+    SDL_Window *window = SDL_GetWindowFromID(renderer->window);
+    SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
+
+    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;
+
+        if (blendMode &
+            (SDL_TextureBlendMode_Mask | SDL_TextureBlendMode_Blend)) {
+            SDL_SetAlpha(surface, SDL_SRCALPHA, 0);
+        } else {
+            SDL_SetAlpha(surface, 0, 0);
+        }
+        if (scaleMode != SDL_TextureScaleMode_None &&
+            (srcrect->w != dstrect->w || srcrect->h != dstrect->h)) {
+            return SDL_SoftStretch(surface, &real_srcrect, target, &real_dstrect);
+        } else {
+            return SDL_LowerBlit(surface, &real_srcrect, target, &real_dstrect);
+        }
+    }
+}
+
+static void
 SDL_DUMMY_RenderPresent(SDL_Renderer * renderer)
 {
     static int frame_number;
-    SDL_DUMMY_RenderData *data =
-        (SDL_DUMMY_RenderData *) renderer->driverdata;
-    SDL_Surface *surface = data->surface;
+    SDL_DUMMY_RenderData *data = (SDL_DUMMY_RenderData *) renderer->driverdata;
 
+    /* Send the data to the display */
     if (SDL_getenv("SDL_VIDEO_DUMMY_SAVE_FRAMES")) {
         char file[128];
         SDL_snprintf(file, sizeof(file), "SDL_window%d-%8.8d.bmp",
                      renderer->window, ++frame_number);
-        SDL_SaveBMP(surface, file);
+        SDL_SaveBMP(data->screens[data->current_screen], file);
+    }
+
+    /* 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;
     }
 }
 
-void
+static void
+SDL_DUMMY_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture)
+{
+    if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
+        SDL_SW_DestroyYUVTexture((SDL_SW_YUVTexture *) texture->driverdata);
+    } else {
+        SDL_Surface *surface = (SDL_Surface *) texture->driverdata;
+
+        SDL_FreeSurface(surface);
+    }
+}
+
+static void
 SDL_DUMMY_DestroyRenderer(SDL_Renderer * renderer)
 {
-    SDL_DUMMY_RenderData *data =
-        (SDL_DUMMY_RenderData *) renderer->driverdata;
+    SDL_DUMMY_RenderData *data = (SDL_DUMMY_RenderData *) renderer->driverdata;
+    int i;
 
     if (data) {
-        if (data->surface) {
-            data->surface->format->palette = NULL;
-            SDL_FreeSurface(data->surface);
+        for (i = 0; i < SDL_arraysize(data->screens); ++i) {
+            if (data->screens[i]) {
+                SDL_FreeSurface(data->screens[i]);
+            }
         }
         SDL_free(data);
     }