src/video/win32/SDL_gdirender.c
branchSDL-1.3
changeset 1730 e70477157db9
child 1897 c2a27da60b18
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/video/win32/SDL_gdirender.c	Sat Jul 08 18:06:02 2006 +0000
@@ -0,0 +1,721 @@
+/*
+    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"
+
+#if SDL_VIDEO_RENDER_GDI
+
+#include "SDL_win32video.h"
+#include "../SDL_yuv_sw_c.h"
+
+/* GDI renderer implementation */
+
+static SDL_Renderer *SDL_GDI_CreateRenderer(SDL_Window * window,
+                                            Uint32 flags);
+static int SDL_GDI_CreateTexture(SDL_Renderer * renderer,
+                                 SDL_Texture * texture);
+static int SDL_GDI_QueryTexturePixels(SDL_Renderer * renderer,
+                                      SDL_Texture * texture, void **pixels,
+                                      int *pitch);
+static int SDL_GDI_SetTexturePalette(SDL_Renderer * renderer,
+                                     SDL_Texture * texture,
+                                     const SDL_Color * colors, int firstcolor,
+                                     int ncolors);
+static int SDL_GDI_GetTexturePalette(SDL_Renderer * renderer,
+                                     SDL_Texture * texture,
+                                     SDL_Color * colors, int firstcolor,
+                                     int ncolors);
+static int SDL_GDI_UpdateTexture(SDL_Renderer * renderer,
+                                 SDL_Texture * texture, const SDL_Rect * rect,
+                                 const void *pixels, int pitch);
+static int SDL_GDI_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
+                               const SDL_Rect * rect, int markDirty,
+                               void **pixels, int *pitch);
+static void SDL_GDI_UnlockTexture(SDL_Renderer * renderer,
+                                  SDL_Texture * texture);
+static void SDL_GDI_DirtyTexture(SDL_Renderer * renderer,
+                                 SDL_Texture * texture, int numrects,
+                                 const SDL_Rect * rects);
+static void SDL_GDI_SelectRenderTexture(SDL_Renderer * renderer,
+                                        SDL_Texture * texture);
+static int SDL_GDI_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect,
+                              Uint32 color);
+static int SDL_GDI_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
+                              const SDL_Rect * srcrect,
+                              const SDL_Rect * dstrect, int blendMode,
+                              int scaleMode);
+static int SDL_GDI_RenderReadPixels(SDL_Renderer * renderer,
+                                    const SDL_Rect * rect, void *pixels,
+                                    int pitch);
+static int SDL_GDI_RenderWritePixels(SDL_Renderer * renderer,
+                                     const SDL_Rect * rect,
+                                     const void *pixels, int pitch);
+static void SDL_GDI_RenderPresent(SDL_Renderer * renderer);
+static void SDL_GDI_DestroyTexture(SDL_Renderer * renderer,
+                                   SDL_Texture * texture);
+static void SDL_GDI_DestroyRenderer(SDL_Renderer * renderer);
+
+
+SDL_RenderDriver SDL_GDI_RenderDriver = {
+    SDL_GDI_CreateRenderer,
+    {
+     "gdi",
+     (SDL_Renderer_PresentDiscard |
+      SDL_Renderer_PresentCopy | SDL_Renderer_RenderTarget),
+     (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
+{
+    HWND hwnd;
+    HDC window_hdc;
+    HDC render_hdc;
+    HDC memory_hdc;
+    HDC current_hdc;
+    LPBITMAPINFO bmi;
+    HBITMAP window_bmp;
+    void *window_pixels;
+    int window_pitch;
+} SDL_GDI_RenderData;
+
+typedef struct
+{
+    SDL_SW_YUVTexture *yuv;
+    Uint32 format;
+    HPALETTE hpal;
+    HBITMAP hbm;
+    void *pixels;
+    int pitch;
+} SDL_GDI_TextureData;
+
+static void
+UpdateYUVTextureData(SDL_Texture * texture)
+{
+    SDL_GDI_TextureData *data = (SDL_GDI_TextureData *) texture->driverdata;
+    SDL_Rect rect;
+
+    rect.x = 0;
+    rect.y = 0;
+    rect.w = texture->w;
+    rect.h = texture->h;
+    SDL_SW_CopyYUVToRGB(data->yuv, &rect, data->format, texture->w,
+                        texture->h, data->pixels, data->pitch);
+}
+
+void
+GDI_AddRenderDriver(_THIS)
+{
+    SDL_AddRenderDriver(0, &SDL_GDI_RenderDriver);
+}
+
+SDL_Renderer *
+SDL_GDI_CreateRenderer(SDL_Window * window, Uint32 flags)
+{
+    SDL_WindowData *windowdata = (SDL_WindowData *) window->driverdata;
+    SDL_Renderer *renderer;
+    SDL_GDI_RenderData *data;
+    int bmi_size;
+    HBITMAP hbm;
+
+    renderer = (SDL_Renderer *) SDL_malloc(sizeof(*renderer));
+    if (!renderer) {
+        SDL_OutOfMemory();
+        return NULL;
+    }
+    SDL_zerop(renderer);
+
+    data = (SDL_GDI_RenderData *) SDL_malloc(sizeof(*data));
+    if (!data) {
+        SDL_GDI_DestroyRenderer(renderer);
+        SDL_OutOfMemory();
+        return NULL;
+    }
+    SDL_zerop(data);
+
+    data->hwnd = windowdata->hwnd;
+    data->window_hdc = GetDC(data->hwnd);
+    data->render_hdc = CreateCompatibleDC(data->window_hdc);
+    data->memory_hdc = CreateCompatibleDC(data->window_hdc);
+    data->current_hdc = data->window_hdc;
+
+    /* Fill in the compatible bitmap info */
+    bmi_size = sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD);
+    data->bmi = (LPBITMAPINFO) SDL_malloc(bmi_size);
+    if (!data->bmi) {
+        SDL_GDI_DestroyRenderer(renderer);
+        SDL_OutOfMemory();
+        return NULL;
+    }
+    SDL_memset(data->bmi, 0, bmi_size);
+    data->bmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
+
+    hbm = CreateCompatibleBitmap(data->window_hdc, 1, 1);
+    GetDIBits(data->window_hdc, hbm, 0, 1, NULL, data->bmi, DIB_RGB_COLORS);
+    GetDIBits(data->window_hdc, hbm, 0, 1, NULL, data->bmi, DIB_RGB_COLORS);
+    DeleteObject(hbm);
+
+    renderer->CreateTexture = SDL_GDI_CreateTexture;
+    renderer->QueryTexturePixels = SDL_GDI_QueryTexturePixels;
+    renderer->SetTexturePalette = SDL_GDI_SetTexturePalette;
+    renderer->GetTexturePalette = SDL_GDI_GetTexturePalette;
+    renderer->UpdateTexture = SDL_GDI_UpdateTexture;
+    renderer->LockTexture = SDL_GDI_LockTexture;
+    renderer->UnlockTexture = SDL_GDI_UnlockTexture;
+    renderer->DirtyTexture = SDL_GDI_DirtyTexture;
+    renderer->SelectRenderTexture = SDL_GDI_SelectRenderTexture;
+    renderer->RenderFill = SDL_GDI_RenderFill;
+    renderer->RenderCopy = SDL_GDI_RenderCopy;
+    renderer->RenderReadPixels = SDL_GDI_RenderReadPixels;
+    renderer->RenderWritePixels = SDL_GDI_RenderWritePixels;
+    renderer->RenderPresent = SDL_GDI_RenderPresent;
+    renderer->DestroyTexture = SDL_GDI_DestroyTexture;
+    renderer->DestroyRenderer = SDL_GDI_DestroyRenderer;
+    renderer->info = SDL_GDI_RenderDriver.info;
+    renderer->window = window->id;
+    renderer->driverdata = data;
+
+    renderer->info.flags = SDL_Renderer_RenderTarget;
+
+    return renderer;
+}
+
+static int
+SDL_GDI_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
+{
+    SDL_GDI_RenderData *renderdata =
+        (SDL_GDI_RenderData *) renderer->driverdata;
+    SDL_Window *window = SDL_GetWindowFromID(renderer->window);
+    SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
+    SDL_GDI_TextureData *data;
+
+    data = (SDL_GDI_TextureData *) SDL_malloc(sizeof(*data));
+    if (!data) {
+        SDL_OutOfMemory();
+        return -1;
+    }
+    SDL_zerop(data);
+
+    texture->driverdata = data;
+
+    if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
+        if (texture->access == SDL_TextureAccess_Render) {
+            SDL_SetError("Rendering to YUV format textures is not supported");
+            return -1;
+        }
+        data->yuv = SDL_SW_CreateYUVTexture(texture);
+        if (!data->yuv) {
+            SDL_GDI_DestroyTexture(renderer, texture);
+            return -1;
+        }
+        data->format = display->current_mode.format;
+    } else {
+        data->format = texture->format;
+    }
+    data->pitch = (texture->w * SDL_BYTESPERPIXEL(data->format));
+
+    if (data->yuv || texture->access == SDL_TextureAccess_Local
+        || texture->format != SDL_GetCurrentDisplayMode()->format) {
+        int bmi_size;
+        LPBITMAPINFO bmi;
+
+        bmi_size = sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD);
+        bmi = (LPBITMAPINFO) SDL_malloc(bmi_size);
+        if (!bmi) {
+            SDL_GDI_DestroyTexture(renderer, texture);
+            SDL_OutOfMemory();
+            return -1;
+        }
+        SDL_memset(bmi, 0, bmi_size);
+        bmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
+        bmi->bmiHeader.biWidth = texture->w;
+        bmi->bmiHeader.biHeight = -texture->h;  /* topdown bitmap */
+        bmi->bmiHeader.biPlanes = 1;
+        bmi->bmiHeader.biSizeImage = texture->h * data->pitch;
+        bmi->bmiHeader.biXPelsPerMeter = 0;
+        bmi->bmiHeader.biYPelsPerMeter = 0;
+        bmi->bmiHeader.biClrUsed = 0;
+        bmi->bmiHeader.biClrImportant = 0;
+        bmi->bmiHeader.biBitCount = SDL_BYTESPERPIXEL(data->format) * 8;
+        if (SDL_ISPIXELFORMAT_INDEXED(data->format)) {
+            int i, ncolors;
+            LOGPALETTE *palette;
+
+            bmi->bmiHeader.biCompression = BI_RGB;
+            ncolors = (1 << SDL_BITSPERPIXEL(data->format));
+            palette =
+                (LOGPALETTE *) SDL_malloc(sizeof(*palette) +
+                                          ncolors * sizeof(PALETTEENTRY));
+            if (!palette) {
+                SDL_free(bmi);
+                SDL_GDI_DestroyTexture(renderer, texture);
+                SDL_OutOfMemory();
+                return -1;
+            }
+            palette->palVersion = 0x300;
+            palette->palNumEntries = ncolors;
+            for (i = 0; i < ncolors; ++i) {
+                palette->palPalEntry[i].peRed = 0xFF;
+                palette->palPalEntry[i].peGreen = 0xFF;
+                palette->palPalEntry[i].peBlue = 0xFF;
+                palette->palPalEntry[i].peFlags = 0;
+            }
+            data->hpal = CreatePalette(palette);
+            SDL_free(palette);
+        } else {
+            int bpp;
+            Uint32 Rmask, Gmask, Bmask, Amask;
+
+            bmi->bmiHeader.biCompression = BI_BITFIELDS;
+            SDL_PixelFormatEnumToMasks(data->format, &bpp, &Rmask, &Gmask,
+                                       &Bmask, &Amask);
+            ((Uint32 *) bmi->bmiColors)[0] = Rmask;
+            ((Uint32 *) bmi->bmiColors)[1] = Gmask;
+            ((Uint32 *) bmi->bmiColors)[2] = Bmask;
+            data->hpal = NULL;
+        }
+        data->hbm =
+            CreateDIBSection(renderdata->memory_hdc, bmi, DIB_RGB_COLORS,
+                             &data->pixels, NULL, 0);
+    } else {
+        data->hbm =
+            CreateCompatibleBitmap(renderdata->window_hdc, texture->w,
+                                   texture->h);
+        data->pixels = NULL;
+    }
+    if (!data->hbm) {
+        SDL_GDI_DestroyTexture(renderer, texture);
+        WIN_SetError("Couldn't create bitmap");
+        return -1;
+    }
+    return 0;
+}
+
+static int
+SDL_GDI_QueryTexturePixels(SDL_Renderer * renderer, SDL_Texture * texture,
+                           void **pixels, int *pitch)
+{
+    SDL_GDI_TextureData *data = (SDL_GDI_TextureData *) texture->driverdata;
+
+    if (data->yuv) {
+        return SDL_SW_QueryYUVTexturePixels(data->yuv, pixels, pitch);
+    } else {
+        *pixels = data->pixels;
+        *pitch = texture->w * SDL_BYTESPERPIXEL(texture->format);
+        return 0;
+    }
+}
+
+static int
+SDL_GDI_SetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
+                          const SDL_Color * colors, int firstcolor,
+                          int ncolors)
+{
+    SDL_GDI_RenderData *renderdata =
+        (SDL_GDI_RenderData *) renderer->driverdata;
+    SDL_GDI_TextureData *data = (SDL_GDI_TextureData *) texture->driverdata;
+
+    if (data->yuv) {
+        SDL_SetError("YUV textures don't have a palette");
+        return -1;
+    } else {
+        PALETTEENTRY entries[256];
+        int i;
+
+        for (i = 0; i < ncolors; ++i) {
+            entries[i].peRed = colors[i].r;
+            entries[i].peGreen = colors[i].g;
+            entries[i].peBlue = colors[i].b;
+            entries[i].peFlags = 0;
+        }
+        if (!SetPaletteEntries(data->hpal, firstcolor, ncolors, entries)) {
+            WIN_SetError("SetPaletteEntries()");
+            return -1;
+        }
+        return 0;
+    }
+}
+
+static int
+SDL_GDI_GetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
+                          SDL_Color * colors, int firstcolor, int ncolors)
+{
+    SDL_GDI_TextureData *data = (SDL_GDI_TextureData *) texture->driverdata;
+
+    if (data->yuv) {
+        SDL_SetError("YUV textures don't have a palette");
+        return -1;
+    } else {
+        PALETTEENTRY entries[256];
+        int i;
+
+        if (!GetPaletteEntries(data->hpal, firstcolor, ncolors, entries)) {
+            WIN_SetError("GetPaletteEntries()");
+            return -1;
+        }
+        for (i = 0; i < ncolors; ++i) {
+            colors[i].r = entries[i].peRed;
+            colors[i].g = entries[i].peGreen;
+            colors[i].b = entries[i].peBlue;
+        }
+        return 0;
+    }
+}
+
+static int
+SDL_GDI_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
+                      const SDL_Rect * rect, const void *pixels, int pitch)
+{
+    SDL_GDI_TextureData *data = (SDL_GDI_TextureData *) texture->driverdata;
+
+    if (data->yuv) {
+        if (SDL_SW_UpdateYUVTexture(data->yuv, rect, pixels, pitch) < 0) {
+            return -1;
+        }
+        UpdateYUVTextureData(texture);
+        return 0;
+    } else {
+        SDL_GDI_RenderData *renderdata =
+            (SDL_GDI_RenderData *) renderer->driverdata;
+
+        if (data->pixels) {
+            Uint8 *src, *dst;
+            int row;
+            size_t length;
+
+            src = (Uint8 *) pixels;
+            dst =
+                (Uint8 *) data->pixels + rect->y * data->pitch +
+                rect->x * SDL_BYTESPERPIXEL(texture->format);
+            length = rect->w * SDL_BYTESPERPIXEL(texture->format);
+            for (row = 0; row < rect->h; ++row) {
+                SDL_memcpy(dst, src, length);
+                src += pitch;
+                dst += data->pitch;
+            }
+        } else if (rect->w == texture->w && pitch == data->pitch) {
+            if (!SetDIBits
+                (renderdata->window_hdc, data->hbm, rect->y, rect->h, pixels,
+                 renderdata->bmi, DIB_RGB_COLORS)) {
+                WIN_SetError("SetDIBits()");
+                return -1;
+            }
+        } else {
+            SDL_SetError
+                ("FIXME: Need to allocate temporary memory and do GetDIBits() followed by SetDIBits(), since we can only set blocks of scanlines at a time");
+            return -1;
+        }
+        return 0;
+    }
+}
+
+static int
+SDL_GDI_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
+                    const SDL_Rect * rect, int markDirty, void **pixels,
+                    int *pitch)
+{
+    SDL_GDI_TextureData *data = (SDL_GDI_TextureData *) texture->driverdata;
+
+    if (data->yuv) {
+        return SDL_SW_LockYUVTexture(data->yuv, rect, markDirty, pixels,
+                                     pitch);
+    } else {
+        GdiFlush();
+        *pixels =
+            (void *) ((Uint8 *) data->pixels + rect->y * data->pitch +
+                      rect->x * SDL_BYTESPERPIXEL(texture->format));
+        *pitch = data->pitch;
+        return 0;
+    }
+}
+
+static void
+SDL_GDI_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture)
+{
+    SDL_GDI_TextureData *data = (SDL_GDI_TextureData *) texture->driverdata;
+
+    if (data->yuv) {
+        SDL_SW_UnlockYUVTexture(data->yuv);
+        UpdateYUVTextureData(texture);
+    }
+}
+
+static void
+SDL_GDI_DirtyTexture(SDL_Renderer * renderer, SDL_Texture * texture,
+                     int numrects, const SDL_Rect * rects)
+{
+}
+
+static void
+SDL_GDI_SelectRenderTexture(SDL_Renderer * renderer, SDL_Texture * texture)
+{
+    SDL_GDI_RenderData *data = (SDL_GDI_RenderData *) renderer->driverdata;
+
+    if (texture) {
+        SDL_GDI_TextureData *texturedata =
+            (SDL_GDI_TextureData *) texture->driverdata;
+        SelectObject(data->render_hdc, texturedata->hbm);
+        if (texturedata->hpal) {
+            SelectPalette(data->render_hdc, texturedata->hpal, TRUE);
+            RealizePalette(data->render_hdc);
+        }
+        data->current_hdc = data->render_hdc;
+    } else {
+        data->current_hdc = data->current_hdc;
+    }
+}
+
+static int
+SDL_GDI_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect,
+                   Uint32 color)
+{
+    SDL_GDI_RenderData *data = (SDL_GDI_RenderData *) renderer->driverdata;
+    Uint8 r, g, b;
+    RECT rc;
+    static HBRUSH brush;
+    int status;
+
+    r = (Uint8) ((color >> 16) & 0xFF);
+    g = (Uint8) ((color >> 8) & 0xFF);
+    b = (Uint8) (color & 0xFF);
+
+    rc.left = rect->x;
+    rc.top = rect->y;
+    rc.right = rect->x + rect->w + 1;
+    rc.bottom = rect->y + rect->h + 1;
+
+    /* Should we cache the brushes? .. it looks like GDI does for us. :) */
+    brush = CreateSolidBrush(RGB(r, g, b));
+    SelectObject(data->current_hdc, brush);
+    status = FillRect(data->current_hdc, &rc, brush);
+    DeleteObject(brush);
+
+    if (!status) {
+        WIN_SetError("FillRect()");
+        return -1;
+    }
+    return 0;
+}
+
+static int
+SDL_GDI_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
+                   const SDL_Rect * srcrect, const SDL_Rect * dstrect,
+                   int blendMode, int scaleMode)
+{
+    SDL_GDI_RenderData *data = (SDL_GDI_RenderData *) renderer->driverdata;
+    SDL_GDI_TextureData *texturedata =
+        (SDL_GDI_TextureData *) texture->driverdata;
+
+    SelectObject(data->memory_hdc, texturedata->hbm);
+    if (texturedata->hpal) {
+        SelectPalette(data->memory_hdc, texturedata->hpal, TRUE);
+        RealizePalette(data->memory_hdc);
+    }
+    if (blendMode & (SDL_TextureBlendMode_Mask | SDL_TextureBlendMode_Blend)) {
+        static BLENDFUNCTION blendFunc = {
+            AC_SRC_OVER,
+            0,
+            255,
+            AC_SRC_ALPHA
+        };
+        /* FIXME: GDI uses premultiplied alpha! */
+        if (!AlphaBlend
+            (data->current_hdc, dstrect->x, dstrect->y, dstrect->w,
+             dstrect->h, data->memory_hdc, srcrect->x, srcrect->y, srcrect->w,
+             srcrect->h, blendFunc)) {
+            WIN_SetError("AlphaBlend()");
+            return -1;
+        }
+    } else {
+        if (srcrect->w == dstrect->w && srcrect->h == dstrect->h) {
+            if (!BitBlt
+                (data->current_hdc, dstrect->x, dstrect->y, dstrect->w,
+                 srcrect->h, data->memory_hdc, srcrect->x, srcrect->y,
+                 SRCCOPY)) {
+                WIN_SetError("BitBlt()");
+                return -1;
+            }
+        } else {
+            if (!StretchBlt
+                (data->current_hdc, dstrect->x, dstrect->y, dstrect->w,
+                 dstrect->h, data->memory_hdc, srcrect->x, srcrect->y,
+                 srcrect->w, srcrect->h, SRCCOPY)) {
+                WIN_SetError("StretchBlt()");
+                return -1;
+            }
+        }
+    }
+    return 0;
+}
+
+static int
+CreateWindowDIB(SDL_GDI_RenderData * data, SDL_Window * window)
+{
+    data->window_pitch = window->w * (data->bmi->bmiHeader.biBitCount / 8);
+    data->bmi->bmiHeader.biWidth = window->w;
+    data->bmi->bmiHeader.biHeight = -window->h;
+    data->bmi->bmiHeader.biSizeImage =
+        window->h * (data->bmi->bmiHeader.biBitCount / 8);
+    data->window_bmp =
+        CreateDIBSection(data->window_hdc, data->bmi, DIB_RGB_COLORS,
+                         &data->window_pixels, NULL, 0);
+    if (!data->window_bmp) {
+        WIN_SetError("CreateDIBSection()");
+        return -1;
+    }
+    return 0;
+}
+
+static int
+SDL_GDI_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
+                         void *pixels, int pitch)
+{
+    SDL_Window *window = SDL_GetWindowFromID(renderer->window);
+    SDL_GDI_RenderData *data = (SDL_GDI_RenderData *) renderer->driverdata;
+
+    if (!data->window_bmp) {
+        if (CreateWindowDIB(data, window) < 0) {
+            return -1;
+        }
+    }
+
+    SelectObject(data->memory_hdc, data->window_bmp);
+    BitBlt(data->memory_hdc, rect->x, rect->y, rect->w, rect->h,
+           data->window_hdc, rect->x, rect->y, SRCCOPY);
+
+    {
+        int bpp = data->bmi->bmiHeader.biBitCount / 8;
+        Uint8 *src =
+            (Uint8 *) data->window_pixels + rect->y * data->window_pitch +
+            rect->x * bpp;
+        Uint8 *dst = (Uint8 *) pixels;
+        int row;
+
+        for (row = 0; row < rect->h; ++row) {
+            SDL_memcpy(dst, src, rect->w * bpp);
+            src += data->window_pitch;
+            dst += pitch;
+        }
+    }
+
+    return 0;
+}
+
+static int
+SDL_GDI_RenderWritePixels(SDL_Renderer * renderer, const SDL_Rect * rect,
+                          const void *pixels, int pitch)
+{
+    SDL_Window *window = SDL_GetWindowFromID(renderer->window);
+    SDL_GDI_RenderData *data = (SDL_GDI_RenderData *) renderer->driverdata;
+
+    if (!data->window_bmp) {
+        if (CreateWindowDIB(data, window) < 0) {
+            return -1;
+        }
+    }
+
+    {
+        int bpp = data->bmi->bmiHeader.biBitCount / 8;
+        Uint8 *src = (Uint8 *) pixels;
+        Uint8 *dst =
+            (Uint8 *) data->window_pixels + rect->y * data->window_pitch +
+            rect->x * bpp;
+        int row;
+
+        for (row = 0; row < rect->h; ++row) {
+            SDL_memcpy(dst, src, rect->w * bpp);
+            src += pitch;
+            dst += data->window_pitch;
+        }
+    }
+
+    SelectObject(data->memory_hdc, data->window_bmp);
+    BitBlt(data->window_hdc, rect->x, rect->y, rect->w, rect->h,
+           data->memory_hdc, rect->x, rect->y, SRCCOPY);
+
+    return 0;
+}
+
+static void
+SDL_GDI_RenderPresent(SDL_Renderer * renderer)
+{
+}
+
+static void
+SDL_GDI_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture)
+{
+    SDL_GDI_TextureData *data = (SDL_GDI_TextureData *) texture->driverdata;
+
+    if (!data) {
+        return;
+    }
+    if (data->yuv) {
+        SDL_SW_DestroyYUVTexture(data->yuv);
+    }
+    if (data->hpal) {
+        DeleteObject(data->hpal);
+    }
+    if (data->hbm) {
+        DeleteObject(data->hbm);
+    }
+    SDL_free(data);
+    texture->driverdata = NULL;
+}
+
+void
+SDL_GDI_DestroyRenderer(SDL_Renderer * renderer)
+{
+    SDL_GDI_RenderData *data = (SDL_GDI_RenderData *) renderer->driverdata;
+
+    if (data) {
+        ReleaseDC(data->hwnd, data->window_hdc);
+        DeleteDC(data->render_hdc);
+        DeleteDC(data->memory_hdc);
+        if (data->bmi) {
+            SDL_free(data->bmi);
+        }
+        if (data->window_bmp) {
+            DeleteObject(data->window_bmp);
+        }
+        SDL_free(data);
+    }
+    SDL_free(renderer);
+}
+
+#endif /* SDL_VIDEO_RENDER_GDI */
+
+/* vi: set ts=4 sw=4 expandtab: */