/*

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_Minimal |

SDL_Renderer_SingleBuffer | SDL_Renderer_PresentCopy |

SDL_Renderer_PresentFlip2 | SDL_Renderer_PresentFlip3 |

SDL_Renderer_PresentDiscard | 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 hbm[3];

int current_hbm;

SDL_DirtyRectList dirty;

SDL_bool makedirty;

HBITMAP window_dib;

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);

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;

data->hwnd = windowdata->hwnd;

data->window_hdc = GetDC(data->hwnd);

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_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);

if (flags & SDL_Renderer_SingleBuffer) {

renderer->info.flags |= SDL_Renderer_SingleBuffer;

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]) {

SDL_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

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;

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);

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

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;

data->makedirty = SDL_FALSE;

} else if (renderer->info.flags & SDL_Renderer_SingleBuffer) {

data->current_hdc = data->window_hdc;

data->makedirty = SDL_FALSE;

SelectObject(data->render_hdc, data->hbm[data->current_hbm]);

data->current_hdc = data->render_hdc;

data->makedirty = SDL_TRUE;

}

}

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;

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

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;

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 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);

CreateDIBSection(data->window_hdc, data->bmi, DIB_RGB_COLORS,

&data->window_pixels, NULL, 0);

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 (CreateWindowDIB(data, window) < 0) {

return -1;

}

}

{

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->makedirty) {

SDL_AddDirtyRect(&data->dirty, rect);

}

if (!data->window_dib) {

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_dib);

BitBlt(data->current_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)

{

SDL_GDI_RenderData *data = (SDL_GDI_RenderData *) renderer->driverdata;

SDL_DirtyRect *dirty;

int new_hbm;

/* 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

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);

}

for (i = 0; i < SDL_arraysize(data->hbm); ++i) {

if (data->hbm[i]) {

DeleteObject(data->hbm[i]);

}

}

SDL_FreeDirtyRects(&data->dirty);

if (data->window_dib) {

DeleteObject(data->window_dib);

}

SDL_free(data);

}

SDL_free(renderer);

}

#endif /* SDL_VIDEO_RENDER_GDI */

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