view src/video/win32/SDL_gdirender.c @ 1982:3b4ce57c6215

First shot at new audio data types (int32 and float32). Notable changes: - Converters between types are autogenerated. Instead of making multiple passes over the data with seperate filters for endianess, size, signedness, etc, converting between data types is always one specialized filter. This simplifies SDL_BuildAudioCVT(), which otherwise had a million edge cases with the new types, and makes the actually conversions more CPU cache friendly. Left a stub for adding specific optimized versions of these routines (SSE/MMX/Altivec, assembler, etc) - Autogenerated converters are built by SDL/src/audio/sdlgenaudiocvt.pl. This does not need to be run unless tweaking the code, and thus doesn't need integration into the build system. - Went through all the drivers and tried to weed out all the "Uint16" references that are better specified with the new SDL_AudioFormat typedef. - Cleaned out a bunch of hardcoded bitwise magic numbers and replaced them with new SDL_AUDIO_* macros. - Added initial float32 and int32 support code. Theoretically, existing drivers will push these through converters to get the data they want to feed to the hardware. Still TODO: - Optimize and debug new converters. - Update the CoreAudio backend to accept float32 data directly. - Other backends, too? - SDL_LoadWAV() needs to be updated to support int32 and float32 .wav files (both of which exist and can be generated by 'sox' for testing purposes). - Update the mixer to handle new datatypes. - Optionally update SDL_sound and SDL_mixer, etc.
author Ryan C. Gordon <icculus@icculus.org>
date Thu, 24 Aug 2006 12:10:46 +0000
parents ccef0d0c40c6
children 8055185ae4ed
line wrap: on
line source

/*
    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_rect_c.h"
#include "../SDL_yuv_sw_c.h"

/* GDI renderer implementation */

static SDL_Renderer *GDI_CreateRenderer(SDL_Window * window, Uint32 flags);
static int GDI_DisplayModeChanged(SDL_Renderer * renderer);
static int GDI_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture);
static int GDI_QueryTexturePixels(SDL_Renderer * renderer,
                                  SDL_Texture * texture, void **pixels,
                                  int *pitch);
static int GDI_SetTexturePalette(SDL_Renderer * renderer,
                                 SDL_Texture * texture,
                                 const SDL_Color * colors, int firstcolor,
                                 int ncolors);
static int GDI_GetTexturePalette(SDL_Renderer * renderer,
                                 SDL_Texture * texture, SDL_Color * colors,
                                 int firstcolor, int ncolors);
static int GDI_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
                             const SDL_Rect * rect, const void *pixels,
                             int pitch);
static int GDI_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
                           const SDL_Rect * rect, int markDirty,
                           void **pixels, int *pitch);
static void GDI_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture);
static void GDI_DirtyTexture(SDL_Renderer * renderer, SDL_Texture * texture,
                             int numrects, const SDL_Rect * rects);
static int GDI_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect,
                          Uint32 color);
static int GDI_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
                          const SDL_Rect * srcrect, const SDL_Rect * dstrect,
                          int blendMode, int scaleMode);
static void GDI_RenderPresent(SDL_Renderer * renderer);
static void GDI_DestroyTexture(SDL_Renderer * renderer,
                               SDL_Texture * texture);
static void GDI_DestroyRenderer(SDL_Renderer * renderer);


SDL_RenderDriver GDI_RenderDriver = {
    GDI_CreateRenderer,
    {
     "gdi",
     (SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTCOPY |
      SDL_RENDERER_PRESENTFLIP2 | SDL_RENDERER_PRESENTFLIP3 |
      SDL_RENDERER_PRESENTDISCARD | SDL_RENDERER_ACCELERATED),
     (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 hbm[3];
    int current_hbm;
    SDL_DirtyRectList dirty;
    SDL_bool makedirty;
} GDI_RenderData;

typedef struct
{
    SDL_SW_YUVTexture *yuv;
    Uint32 format;
    HPALETTE hpal;
    HBITMAP hbm;
    void *pixels;
    int pitch;
} GDI_TextureData;

static void
UpdateYUVTextureData(SDL_Texture * texture)
{
    GDI_TextureData *data = (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, &GDI_RenderDriver);
}

SDL_Renderer *
GDI_CreateRenderer(SDL_Window * window, Uint32 flags)
{
    SDL_WindowData *windowdata = (SDL_WindowData *) window->driverdata;
    SDL_Renderer *renderer;
    GDI_RenderData *data;
    int bmi_size;
    HBITMAP hbm;
    int i, n;

    renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
    if (!renderer) {
        SDL_OutOfMemory();
        return NULL;
    }

    data = (GDI_RenderData *) SDL_calloc(1, sizeof(*data));
    if (!data) {
        GDI_DestroyRenderer(renderer);
        SDL_OutOfMemory();
        return NULL;
    }

    renderer->DisplayModeChanged = GDI_DisplayModeChanged;
    renderer->CreateTexture = GDI_CreateTexture;
    renderer->QueryTexturePixels = GDI_QueryTexturePixels;
    renderer->SetTexturePalette = GDI_SetTexturePalette;
    renderer->GetTexturePalette = GDI_GetTexturePalette;
    renderer->UpdateTexture = GDI_UpdateTexture;
    renderer->LockTexture = GDI_LockTexture;
    renderer->UnlockTexture = GDI_UnlockTexture;
    renderer->DirtyTexture = GDI_DirtyTexture;
    renderer->RenderFill = GDI_RenderFill;
    renderer->RenderCopy = GDI_RenderCopy;
    renderer->RenderPresent = GDI_RenderPresent;
    renderer->DestroyTexture = GDI_DestroyTexture;
    renderer->DestroyRenderer = GDI_DestroyRenderer;
    renderer->info = GDI_RenderDriver.info;
    renderer->window = window->id;
    renderer->driverdata = data;

    renderer->info.flags = SDL_RENDERER_ACCELERATED;

    data->hwnd = windowdata->hwnd;
    data->window_hdc = windowdata->hdc;
    data->render_hdc = CreateCompatibleDC(data->window_hdc);
    data->memory_hdc = CreateCompatibleDC(data->window_hdc);

    /* Fill in the compatible bitmap info */
    bmi_size = sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD);
    data->bmi = (LPBITMAPINFO) SDL_calloc(1, bmi_size);
    if (!data->bmi) {
        GDI_DestroyRenderer(renderer);
        SDL_OutOfMemory();
        return NULL;
    }
    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);

    if (flags & SDL_RENDERER_SINGLEBUFFER) {
        renderer->info.flags |=
            (SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTCOPY);
        n = 0;
    } else 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->hbm[i] =
            CreateCompatibleBitmap(data->window_hdc, window->w, window->h);
        if (!data->hbm[i]) {
            GDI_DestroyRenderer(renderer);
            WIN_SetError("CreateCompatibleBitmap()");
            return NULL;
        }
    }
    if (n > 0) {
        SelectObject(data->render_hdc, data->hbm[0]);
        data->current_hdc = data->render_hdc;
        data->makedirty = SDL_TRUE;
    } else {
        data->current_hdc = data->window_hdc;
        data->makedirty = SDL_FALSE;
    }
    data->current_hbm = 0;

    return renderer;
}

static int
GDI_DisplayModeChanged(SDL_Renderer * renderer)
{
    GDI_RenderData *data = (GDI_RenderData *) renderer->driverdata;
    SDL_Window *window = SDL_GetWindowFromID(renderer->window);
    int i, n;

    if (renderer->info.flags & SDL_RENDERER_SINGLEBUFFER) {
        n = 0;
    } else if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP2) {
        n = 2;
    } else if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP3) {
        n = 3;
    } else {
        n = 1;
    }
    for (i = 0; i < n; ++i) {
        if (data->hbm[i]) {
            DeleteObject(data->hbm[i]);
            data->hbm[i] = NULL;
        }
    }
    for (i = 0; i < n; ++i) {
        data->hbm[i] =
            CreateCompatibleBitmap(data->window_hdc, window->w, window->h);
        if (!data->hbm[i]) {
            WIN_SetError("CreateCompatibleBitmap()");
            return -1;
        }
    }
    if (n > 0) {
        SelectObject(data->render_hdc, data->hbm[0]);
    }
    return 0;
}

static int
GDI_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
    GDI_RenderData *renderdata = (GDI_RenderData *) renderer->driverdata;
    SDL_Window *window = SDL_GetWindowFromID(renderer->window);
    SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
    GDI_TextureData *data;

    data = (GDI_TextureData *) SDL_calloc(1, sizeof(*data));
    if (!data) {
        SDL_OutOfMemory();
        return -1;
    }

    texture->driverdata = data;

    if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
        data->yuv = SDL_SW_CreateYUVTexture(texture);
        if (!data->yuv) {
            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 != display->current_mode.format) {
        int bmi_size;
        LPBITMAPINFO bmi;

        bmi_size = sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD);
        bmi = (LPBITMAPINFO) SDL_calloc(1, bmi_size);
        if (!bmi) {
            SDL_OutOfMemory();
            return -1;
        }
        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_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) {
        WIN_SetError("Couldn't create bitmap");
        return -1;
    }
    return 0;
}

static int
GDI_QueryTexturePixels(SDL_Renderer * renderer, SDL_Texture * texture,
                       void **pixels, int *pitch)
{
    GDI_TextureData *data = (GDI_TextureData *) texture->driverdata;

    if (data->yuv) {
        return SDL_SW_QueryYUVTexturePixels(data->yuv, pixels, pitch);
    } else {
        *pixels = data->pixels;
        *pitch = data->pitch;
        return 0;
    }
}

static int
GDI_SetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
                      const SDL_Color * colors, int firstcolor, int ncolors)
{
    GDI_RenderData *renderdata = (GDI_RenderData *) renderer->driverdata;
    GDI_TextureData *data = (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
GDI_GetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
                      SDL_Color * colors, int firstcolor, int ncolors)
{
    GDI_TextureData *data = (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
GDI_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
                  const SDL_Rect * rect, const void *pixels, int pitch)
{
    GDI_TextureData *data = (GDI_TextureData *) texture->driverdata;

    if (data->yuv) {
        if (SDL_SW_UpdateYUVTexture(data->yuv, rect, pixels, pitch) < 0) {
            return -1;
        }
        UpdateYUVTextureData(texture);
        return 0;
    } else {
        GDI_RenderData *renderdata = (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
GDI_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
                const SDL_Rect * rect, int markDirty, void **pixels,
                int *pitch)
{
    GDI_TextureData *data = (GDI_TextureData *) texture->driverdata;

    if (data->yuv) {
        return SDL_SW_LockYUVTexture(data->yuv, rect, markDirty, pixels,
                                     pitch);
    } else if (data->pixels) {
        GdiFlush();
        *pixels =
            (void *) ((Uint8 *) data->pixels + rect->y * data->pitch +
                      rect->x * SDL_BYTESPERPIXEL(texture->format));
        *pitch = data->pitch;
        return 0;
    } else {
        SDL_SetError("No pixels available");
        return -1;
    }
}

static void
GDI_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
    GDI_TextureData *data = (GDI_TextureData *) texture->driverdata;

    if (data->yuv) {
        SDL_SW_UnlockYUVTexture(data->yuv);
        UpdateYUVTextureData(texture);
    }
}

static void
GDI_DirtyTexture(SDL_Renderer * renderer, SDL_Texture * texture, int numrects,
                 const SDL_Rect * rects)
{
}

static int
GDI_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect, Uint32 color)
{
    GDI_RenderData *data = (GDI_RenderData *) renderer->driverdata;
    Uint8 r, g, b;
    RECT rc;
    HBRUSH brush;
    int status;

    if (data->makedirty) {
        SDL_AddDirtyRect(&data->dirty, rect);
    }

    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
GDI_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
               const SDL_Rect * srcrect, const SDL_Rect * dstrect,
               int blendMode, int scaleMode)
{
    GDI_RenderData *data = (GDI_RenderData *) renderer->driverdata;
    GDI_TextureData *texturedata = (GDI_TextureData *) texture->driverdata;

    if (data->makedirty) {
        SDL_AddDirtyRect(&data->dirty, dstrect);
    }

    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 void
GDI_RenderPresent(SDL_Renderer * renderer)
{
    GDI_RenderData *data = (GDI_RenderData *) renderer->driverdata;
    SDL_DirtyRect *dirty;

    /* Send the data to the display */
    if (!(renderer->info.flags & SDL_RENDERER_SINGLEBUFFER)) {
        for (dirty = data->dirty.list; dirty; dirty = dirty->next) {
            const SDL_Rect *rect = &dirty->rect;
            BitBlt(data->window_hdc, rect->x, rect->y, rect->w, rect->h,
                   data->render_hdc, rect->x, rect->y, SRCCOPY);
        }
        SDL_ClearDirtyRects(&data->dirty);
    }

    /* Update the flipping chain, if any */
    if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP2) {
        data->current_hbm = (data->current_hbm + 1) % 2;
        SelectObject(data->render_hdc, data->hbm[data->current_hbm]);
    } else if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP3) {
        data->current_hbm = (data->current_hbm + 1) % 3;
        SelectObject(data->render_hdc, data->hbm[data->current_hbm]);
    }
}

static void
GDI_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
    GDI_TextureData *data = (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;
}

static void
GDI_DestroyRenderer(SDL_Renderer * renderer)
{
    GDI_RenderData *data = (GDI_RenderData *) renderer->driverdata;
    int i;

    if (data) {
        DeleteDC(data->render_hdc);
        DeleteDC(data->memory_hdc);
        if (data->bmi) {
            SDL_free(data->bmi);
        }
        for (i = 0; i < SDL_arraysize(data->hbm); ++i) {
            if (data->hbm[i]) {
                DeleteObject(data->hbm[i]);
            }
        }
        SDL_FreeDirtyRects(&data->dirty);
        SDL_free(data);
    }
    SDL_free(renderer);
}

#endif /* SDL_VIDEO_RENDER_GDI */

/* vi: set ts=4 sw=4 expandtab: */