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SDL_gdirender.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2009 Sam Lantinga
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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"
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#include "../SDL_rect_c.h"
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#include "../SDL_yuv_sw_c.h"
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#include "../SDL_alphamult.h"
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#ifdef _WIN32_WCE
#define NO_GETDIBBITS 1
#endif
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/* GDI renderer implementation */
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static SDL_Renderer *GDI_CreateRenderer(SDL_Window * window, Uint32 flags);
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static int GDI_DisplayModeChanged(SDL_Renderer * renderer);
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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);
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static int GDI_SetTextureAlphaMod(SDL_Renderer * renderer,
SDL_Texture * texture);
static int GDI_SetTextureBlendMode(SDL_Renderer * renderer,
SDL_Texture * texture);
static int GDI_SetTextureScaleMode(SDL_Renderer * renderer,
SDL_Texture * texture);
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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);
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static int GDI_SetDrawBlendMode(SDL_Renderer * renderer);
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static int GDI_RenderPoints(SDL_Renderer * renderer, const SDL_Point * points,
int count);
static int GDI_RenderLines(SDL_Renderer * renderer, const SDL_Point * points,
int count);
static int GDI_RenderRects(SDL_Renderer * renderer, const SDL_Rect ** rects,
int count);
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static int GDI_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
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const SDL_Rect * srcrect, const SDL_Rect * dstrect);
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static int GDI_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
Uint32 format, void * pixels, int pitch);
static int GDI_RenderWritePixels(SDL_Renderer * renderer, const SDL_Rect * rect,
Uint32 format, const void * pixels, int pitch);
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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,
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{
"gdi",
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(SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTCOPY |
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SDL_RENDERER_PRESENTFLIP2 | SDL_RENDERER_PRESENTFLIP3 |
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SDL_RENDERER_PRESENTDISCARD | SDL_RENDERER_ACCELERATED),
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(SDL_TEXTUREMODULATE_NONE | SDL_TEXTUREMODULATE_ALPHA),
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(SDL_BLENDMODE_NONE | SDL_BLENDMODE_MASK),
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(SDL_TEXTURESCALEMODE_NONE | SDL_TEXTURESCALEMODE_FAST),
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{
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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,
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SDL_PIXELFORMAT_YV12,
SDL_PIXELFORMAT_IYUV,
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SDL_PIXELFORMAT_YUY2,
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SDL_PIXELFORMAT_UYVY,
SDL_PIXELFORMAT_YVYU},
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0,
0}
};
typedef struct
{
HWND hwnd;
HDC window_hdc;
HDC render_hdc;
HDC memory_hdc;
HDC current_hdc;
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#ifndef NO_GETDIBBITS
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LPBITMAPINFO bmi;
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#endif
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HBITMAP hbm[3];
int current_hbm;
SDL_DirtyRectList dirty;
SDL_bool makedirty;
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} GDI_RenderData;
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typedef struct
{
SDL_SW_YUVTexture *yuv;
Uint32 format;
HPALETTE hpal;
HBITMAP hbm;
void *pixels;
int pitch;
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SDL_bool premultiplied;
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} GDI_TextureData;
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static void
UpdateYUVTextureData(SDL_Texture * texture)
{
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GDI_TextureData *data = (GDI_TextureData *) texture->driverdata;
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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)
{
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int i;
for (i = 0; i < _this->num_displays; ++i) {
SDL_AddRenderDriver(&_this->displays[i], &GDI_RenderDriver);
}
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}
SDL_Renderer *
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GDI_CreateRenderer(SDL_Window * window, Uint32 flags)
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{
SDL_WindowData *windowdata = (SDL_WindowData *) window->driverdata;
SDL_Renderer *renderer;
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GDI_RenderData *data;
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int bmi_size;
HBITMAP hbm;
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int i, n;
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renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
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if (!renderer) {
SDL_OutOfMemory();
return NULL;
}
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data = (GDI_RenderData *) SDL_calloc(1, sizeof(*data));
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if (!data) {
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GDI_DestroyRenderer(renderer);
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SDL_OutOfMemory();
return NULL;
}
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renderer->DisplayModeChanged = GDI_DisplayModeChanged;
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renderer->CreateTexture = GDI_CreateTexture;
renderer->QueryTexturePixels = GDI_QueryTexturePixels;
renderer->SetTexturePalette = GDI_SetTexturePalette;
renderer->GetTexturePalette = GDI_GetTexturePalette;
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renderer->SetTextureAlphaMod = GDI_SetTextureAlphaMod;
renderer->SetTextureBlendMode = GDI_SetTextureBlendMode;
renderer->SetTextureScaleMode = GDI_SetTextureScaleMode;
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renderer->UpdateTexture = GDI_UpdateTexture;
renderer->LockTexture = GDI_LockTexture;
renderer->UnlockTexture = GDI_UnlockTexture;
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renderer->SetDrawBlendMode = GDI_SetDrawBlendMode;
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renderer->RenderPoints = GDI_RenderPoints;
renderer->RenderLines = GDI_RenderLines;
renderer->RenderRects = GDI_RenderRects;
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renderer->RenderCopy = GDI_RenderCopy;
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renderer->RenderReadPixels = GDI_RenderReadPixels;
renderer->RenderWritePixels = GDI_RenderWritePixels;
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renderer->RenderPresent = GDI_RenderPresent;
renderer->DestroyTexture = GDI_DestroyTexture;
renderer->DestroyRenderer = GDI_DestroyRenderer;
renderer->info = GDI_RenderDriver.info;
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renderer->window = window->id;
renderer->driverdata = data;
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renderer->info.flags = SDL_RENDERER_ACCELERATED;
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data->hwnd = windowdata->hwnd;
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data->window_hdc = windowdata->hdc;
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data->render_hdc = CreateCompatibleDC(data->window_hdc);
data->memory_hdc = CreateCompatibleDC(data->window_hdc);
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#ifndef NO_GETDIBBITS
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/* Fill in the compatible bitmap info */
bmi_size = sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD);
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data->bmi = (LPBITMAPINFO) SDL_calloc(1, bmi_size);
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if (!data->bmi) {
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GDI_DestroyRenderer(renderer);
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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);
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#endif
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if (flags & SDL_RENDERER_SINGLEBUFFER) {
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renderer->info.flags |=
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(SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTCOPY);
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n = 0;
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} else if (flags & SDL_RENDERER_PRESENTFLIP2) {
renderer->info.flags |= SDL_RENDERER_PRESENTFLIP2;
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n = 2;
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} else if (flags & SDL_RENDERER_PRESENTFLIP3) {
renderer->info.flags |= SDL_RENDERER_PRESENTFLIP3;
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n = 3;
} else {
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renderer->info.flags |= SDL_RENDERER_PRESENTCOPY;
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n = 1;
}
for (i = 0; i < n; ++i) {
data->hbm[i] =
CreateCompatibleBitmap(data->window_hdc, window->w, window->h);
if (!data->hbm[i]) {
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GDI_DestroyRenderer(renderer);
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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;
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return renderer;
}
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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]);
}
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data->current_hbm = 0;
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return 0;
}
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static HBITMAP
GDI_CreateDIBSection(HDC hdc, int w, int h, int pitch, Uint32 format,
HPALETTE * hpal, void ** pixels)
{
int bmi_size;
LPBITMAPINFO bmi;
bmi_size = sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD);
bmi = (LPBITMAPINFO) SDL_calloc(1, bmi_size);
if (!bmi) {
SDL_OutOfMemory();
return NULL;
}
bmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
bmi->bmiHeader.biWidth = w;
bmi->bmiHeader.biHeight = -h; /* topdown bitmap */
bmi->bmiHeader.biPlanes = 1;
bmi->bmiHeader.biSizeImage = h * pitch;
bmi->bmiHeader.biXPelsPerMeter = 0;
bmi->bmiHeader.biYPelsPerMeter = 0;
bmi->bmiHeader.biClrUsed = 0;
bmi->bmiHeader.biClrImportant = 0;
bmi->bmiHeader.biBitCount = SDL_BYTESPERPIXEL(format) * 8;
if (SDL_ISPIXELFORMAT_INDEXED(format)) {
bmi->bmiHeader.biCompression = BI_RGB;
if (hpal) {
int i, ncolors;
LOGPALETTE *palette;
ncolors = (1 << SDL_BITSPERPIXEL(format));
palette =
(LOGPALETTE *) SDL_malloc(sizeof(*palette) +
ncolors * sizeof(PALETTEENTRY));
if (!palette) {
SDL_free(bmi);
SDL_OutOfMemory();
return NULL;
}
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;
}
*hpal = CreatePalette(palette);
SDL_free(palette);
}
} else {
int bpp;
Uint32 Rmask, Gmask, Bmask, Amask;
bmi->bmiHeader.biCompression = BI_BITFIELDS;
SDL_PixelFormatEnumToMasks(format, &bpp, &Rmask, &Gmask, &Bmask,
&Amask);
((Uint32 *) bmi->bmiColors)[0] = Rmask;
((Uint32 *) bmi->bmiColors)[1] = Gmask;
((Uint32 *) bmi->bmiColors)[2] = Bmask;
if (hpal) {
*hpal = NULL;
}
}
return CreateDIBSection(hdc, bmi, DIB_RGB_COLORS, pixels, NULL, 0);
}
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static int
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GDI_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
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{
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GDI_RenderData *renderdata = (GDI_RenderData *) renderer->driverdata;
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SDL_Window *window = SDL_GetWindowFromID(renderer->window);
SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
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GDI_TextureData *data;
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data = (GDI_TextureData *) SDL_calloc(1, sizeof(*data));
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if (!data) {
SDL_OutOfMemory();
return -1;
}
texture->driverdata = data;
if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
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data->yuv =
SDL_SW_CreateYUVTexture(texture->format, texture->w, texture->h);
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if (!data->yuv) {
return -1;
}
data->format = display->current_mode.format;
} else {
data->format = texture->format;
}
data->pitch = (texture->w * SDL_BYTESPERPIXEL(data->format));
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if (data->yuv || texture->access == SDL_TEXTUREACCESS_STREAMING
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|| texture->format != display->current_mode.format) {
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data->hbm = GDI_CreateDIBSection(renderdata->memory_hdc,
texture->w, texture->h,
data->pitch, data->format,
&data->hpal, &data->pixels);
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} else {
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data->hbm = CreateCompatibleBitmap(renderdata->window_hdc,
texture->w, texture->h);
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}
if (!data->hbm) {
WIN_SetError("Couldn't create bitmap");
return -1;
}
return 0;
}
static int
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GDI_QueryTexturePixels(SDL_Renderer * renderer, SDL_Texture * texture,
void **pixels, int *pitch)
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{
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GDI_TextureData *data = (GDI_TextureData *) texture->driverdata;
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if (data->yuv) {
return SDL_SW_QueryYUVTexturePixels(data->yuv, pixels, pitch);
} else {
*pixels = data->pixels;
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*pitch = data->pitch;
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return 0;
}
}
static int
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GDI_SetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Color * colors, int firstcolor, int ncolors)
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{
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GDI_RenderData *renderdata = (GDI_RenderData *) renderer->driverdata;
GDI_TextureData *data = (GDI_TextureData *) texture->driverdata;
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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
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GDI_GetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
SDL_Color * colors, int firstcolor, int ncolors)
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{
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GDI_TextureData *data = (GDI_TextureData *) texture->driverdata;
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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;
}
}
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static int
GDI_SetTextureAlphaMod(SDL_Renderer * renderer, SDL_Texture * texture)
{
return 0;
}
static int
GDI_SetTextureBlendMode(SDL_Renderer * renderer, SDL_Texture * texture)
{
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GDI_TextureData *data = (GDI_TextureData *) texture->driverdata;
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switch (texture->blendMode) {
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case SDL_BLENDMODE_NONE:
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if (data->premultiplied) {
/* Crap, we've lost the original pixel data... *sigh* */
}
return 0;
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#ifndef _WIN32_WCE /* WinCE has no alphablend */
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case SDL_BLENDMODE_MASK:
case SDL_BLENDMODE_BLEND:
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if (!data->premultiplied && data->pixels) {
switch (texture->format) {
case SDL_PIXELFORMAT_ARGB8888:
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SDL_PreMultiplyAlphaARGB8888(texture->w, texture->h,
(Uint32 *) data->pixels,
data->pitch);
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data->premultiplied = SDL_TRUE;
break;
case SDL_PIXELFORMAT_RGBA8888:
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SDL_PreMultiplyAlphaRGBA8888(texture->w, texture->h,
(Uint32 *) data->pixels,
data->pitch);
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data->premultiplied = SDL_TRUE;
break;
case SDL_PIXELFORMAT_ABGR8888:
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SDL_PreMultiplyAlphaABGR8888(texture->w, texture->h,
(Uint32 *) data->pixels,
data->pitch);
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data->premultiplied = SDL_TRUE;
break;
case SDL_PIXELFORMAT_BGRA8888:
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SDL_PreMultiplyAlphaBGRA8888(texture->w, texture->h,
(Uint32 *) data->pixels,
data->pitch);
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data->premultiplied = SDL_TRUE;
break;
}
}
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return 0;
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#endif
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default:
SDL_Unsupported();
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texture->blendMode = SDL_BLENDMODE_NONE;
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return -1;
}
}
static int
GDI_SetTextureScaleMode(SDL_Renderer * renderer, SDL_Texture * texture)
{
switch (texture->scaleMode) {
case SDL_TEXTURESCALEMODE_NONE:
case SDL_TEXTURESCALEMODE_FAST:
return 0;
case SDL_TEXTURESCALEMODE_SLOW:
case SDL_TEXTURESCALEMODE_BEST:
SDL_Unsupported();
texture->scaleMode = SDL_TEXTURESCALEMODE_FAST;
return -1;
default:
SDL_Unsupported();
texture->scaleMode = SDL_TEXTURESCALEMODE_NONE;
return -1;
}
return 0;
}
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static int
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GDI_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, const void *pixels, int pitch)
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{
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GDI_TextureData *data = (GDI_TextureData *) texture->driverdata;
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if (data->yuv) {
if (SDL_SW_UpdateYUVTexture(data->yuv, rect, pixels, pitch) < 0) {
return -1;
}
UpdateYUVTextureData(texture);
return 0;
} else {
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GDI_RenderData *renderdata = (GDI_RenderData *) renderer->driverdata;
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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;
}
595
if (data->premultiplied) {
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Uint32 *pixels =
(Uint32 *) data->pixels + rect->y * (data->pitch / 4) +
rect->x;
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switch (texture->format) {
case SDL_PIXELFORMAT_ARGB8888:
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SDL_PreMultiplyAlphaARGB8888(rect->w, rect->h, pixels,
data->pitch);
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break;
case SDL_PIXELFORMAT_RGBA8888:
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SDL_PreMultiplyAlphaRGBA8888(rect->w, rect->h, pixels,
data->pitch);
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break;
case SDL_PIXELFORMAT_ABGR8888:
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SDL_PreMultiplyAlphaABGR8888(rect->w, rect->h, pixels,
data->pitch);
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break;
case SDL_PIXELFORMAT_BGRA8888:
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SDL_PreMultiplyAlphaBGRA8888(rect->w, rect->h, pixels,
data->pitch);
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break;
}
}
618
} else if (rect->w == texture->w && pitch == data->pitch) {
619
#ifndef NO_GETDIBBITS
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if (!SetDIBits
(renderdata->window_hdc, data->hbm, rect->y, rect->h, pixels,
renderdata->bmi, DIB_RGB_COLORS)) {
WIN_SetError("SetDIBits()");
return -1;
}
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#else
SDL_SetError("FIXME: Update Texture");
return -1;
#endif
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} 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
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GDI_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, int markDirty, void **pixels,
int *pitch)
643
{
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GDI_TextureData *data = (GDI_TextureData *) texture->driverdata;
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if (data->yuv) {
return SDL_SW_LockYUVTexture(data->yuv, rect, markDirty, pixels,
pitch);
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} else if (data->pixels) {
650
#ifndef _WIN32_WCE
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/* WinCE has no GdiFlush */
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GdiFlush();
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#endif
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*pixels =
(void *) ((Uint8 *) data->pixels + rect->y * data->pitch +
rect->x * SDL_BYTESPERPIXEL(texture->format));
*pitch = data->pitch;
return 0;
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} else {
SDL_SetError("No pixels available");
return -1;
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}
}
static void
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GDI_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture)
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{
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GDI_TextureData *data = (GDI_TextureData *) texture->driverdata;
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if (data->yuv) {
SDL_SW_UnlockYUVTexture(data->yuv);
UpdateYUVTextureData(texture);
}
}
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static int
GDI_SetDrawBlendMode(SDL_Renderer * renderer)
{
switch (renderer->blendMode) {
case SDL_BLENDMODE_NONE:
return 0;
default:
SDL_Unsupported();
renderer->blendMode = SDL_BLENDMODE_NONE;
return -1;
}
}
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static int
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GDI_RenderPoints(SDL_Renderer * renderer, const SDL_Point * points, int count)
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{
GDI_RenderData *data = (GDI_RenderData *) renderer->driverdata;
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int i;
COLORREF color;
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if (data->makedirty) {
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/* Get the smallest rectangle that contains everything */
SDL_Window *window = SDL_GetWindowFromID(renderer->window);
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SDL_Rect rect;
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rect.x = 0;
rect.y = 0;
rect.w = window->w;
rect.h = window->h;
if (!SDL_EnclosePoints(points, count, &rect, &rect)) {
/* Nothing to draw */
return 0;
}
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SDL_AddDirtyRect(&data->dirty, &rect);
}
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color = RGB(renderer->r, renderer->g, renderer->b);
for (i = 0; i < count; ++i) {
SetPixel(data->current_hdc, points[i].x, points[i].y, color);
}
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return 0;
}
static int
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GDI_RenderLines(SDL_Renderer * renderer, const SDL_Point * points, int count)
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{
GDI_RenderData *data = (GDI_RenderData *) renderer->driverdata;
725
HPEN pen;
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BOOL status;
if (data->makedirty) {
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/* Get the smallest rectangle that contains everything */
SDL_Window *window = SDL_GetWindowFromID(renderer->window);
SDL_Rect clip, rect;
clip.x = 0;
clip.y = 0;
clip.w = window->w;
clip.h = window->h;
SDL_EnclosePoints(points, count, NULL, &rect);
if (!SDL_IntersectRect(&rect, &clip, &rect)) {
/* Nothing to draw */
return 0;
741
}
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SDL_AddDirtyRect(&data->dirty, &rect);
}
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/* Should we cache the pen? .. it looks like GDI does for us. :) */
pen = CreatePen(PS_SOLID, 1, RGB(renderer->r, renderer->g, renderer->b));
SelectObject(data->current_hdc, pen);
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{
LPPOINT p = SDL_stack_alloc(POINT, count);
int i;
for (i = 0; i < count; ++i) {
p[i].x = points[i].x;
p[i].y = points[i].y;
}
status = Polyline(data->current_hdc, p, count);
SDL_stack_free(p);
}
760
DeleteObject(pen);
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762
/* Need to close the endpoint of the line */
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if (points[0].x != points[count-1].x || points[0].y != points[count-1].y) {
SetPixel(data->current_hdc, points[count-1].x, points[count-1].y,
RGB(renderer->r, renderer->g, renderer->b));
}
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768
if (!status) {
769
WIN_SetError("Polyline()");
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772
773
774
return -1;
}
return 0;
}
775
static int
776
GDI_RenderRects(SDL_Renderer * renderer, const SDL_Rect ** rects, int count)
777
{
778
GDI_RenderData *data = (GDI_RenderData *) renderer->driverdata;
779
RECT rc;
780
HBRUSH brush;
781
int i, status = 1;
782
783
if (data->makedirty) {
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787
788
789
790
SDL_Window *window = SDL_GetWindowFromID(renderer->window);
SDL_Rect clip, rect;
clip.x = 0;
clip.y = 0;
clip.w = window->w;
clip.h = window->h;
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for (i = 0; i < count; ++i) {
if (SDL_IntersectRect(rects[i], &clip, &rect)) {
SDL_AddDirtyRect(&data->dirty, &rect);
}
}
}
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/* Should we cache the brushes? .. it looks like GDI does for us. :) */
800
brush = CreateSolidBrush(RGB(renderer->r, renderer->g, renderer->b));
801
SelectObject(data->current_hdc, brush);
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804
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808
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811
for (i = 0; i < count; ++i) {
const SDL_Rect *rect = rects[i];
rc.left = rect->x;
rc.top = rect->y;
rc.right = rect->x + rect->w;
rc.bottom = rect->y + rect->h;
status &= FillRect(data->current_hdc, &rc, brush);
}
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815
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820
821
DeleteObject(brush);
if (!status) {
WIN_SetError("FillRect()");
return -1;
}
return 0;
}
static int
822
GDI_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
823
const SDL_Rect * srcrect, const SDL_Rect * dstrect)
824
{
825
826
GDI_RenderData *data = (GDI_RenderData *) renderer->driverdata;
GDI_TextureData *texturedata = (GDI_TextureData *) texture->driverdata;
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830
831
if (data->makedirty) {
SDL_AddDirtyRect(&data->dirty, dstrect);
}
832
833
834
835
836
SelectObject(data->memory_hdc, texturedata->hbm);
if (texturedata->hpal) {
SelectPalette(data->memory_hdc, texturedata->hpal, TRUE);
RealizePalette(data->memory_hdc);
}
837
if (texture->blendMode & (SDL_BLENDMODE_MASK | SDL_BLENDMODE_BLEND)) {
838
839
840
841
#ifdef _WIN32_WCE
SDL_SetError("Texture has blendmode not supported under WinCE");
return -1;
#else
842
BLENDFUNCTION blendFunc = {
843
844
AC_SRC_OVER,
0,
845
texture->a,
846
847
848
849
850
851
852
853
854
AC_SRC_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;
}
855
#endif
856
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858
859
860
861
862
863
864
865
866
867
868
869
870
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872
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877
} 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;
}
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890
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895
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901
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905
906
907
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913
914
915
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917
918
919
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922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
static int
GDI_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
Uint32 format, void * pixels, int pitch)
{
GDI_RenderData *renderdata = (GDI_RenderData *) renderer->driverdata;
SDL_Window *window = SDL_GetWindowFromID(renderer->window);
SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
struct {
HBITMAP hbm;
void *pixels;
int pitch;
Uint32 format;
} data;
data.format = display->current_mode.format;
data.pitch = (rect->w * SDL_BYTESPERPIXEL(data.format));
data.hbm = GDI_CreateDIBSection(renderdata->memory_hdc, rect->w, rect->h,
data.pitch, data.format, NULL,
&data.pixels);
if (!data.hbm) {
WIN_SetError("Couldn't create bitmap");
return -1;
}
SelectObject(renderdata->memory_hdc, data.hbm);
if (!BitBlt(renderdata->memory_hdc, 0, 0, rect->w, rect->h,
renderdata->current_hdc, rect->x, rect->y, SRCCOPY)) {
WIN_SetError("BitBlt()");
DeleteObject(data.hbm);
return -1;
}
SDL_ConvertPixels(rect->w, rect->h,
data.format, data.pixels, data.pitch,
format, pixels, pitch);
DeleteObject(data.hbm);
return 0;
}
static int
GDI_RenderWritePixels(SDL_Renderer * renderer, const SDL_Rect * rect,
Uint32 format, const void * pixels, int pitch)
{
GDI_RenderData *renderdata = (GDI_RenderData *) renderer->driverdata;
SDL_Window *window = SDL_GetWindowFromID(renderer->window);
SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
struct {
HBITMAP hbm;
void *pixels;
int pitch;
Uint32 format;
} data;
data.format = display->current_mode.format;
data.pitch = (rect->w * SDL_BYTESPERPIXEL(data.format));
data.hbm = GDI_CreateDIBSection(renderdata->memory_hdc, rect->w, rect->h,
data.pitch, data.format,
NULL, &data.pixels);
if (!data.hbm) {
WIN_SetError("Couldn't create bitmap");
return -1;
}
SDL_ConvertPixels(rect->w, rect->h, format, pixels, pitch,
data.format, data.pixels, data.pitch);
SelectObject(renderdata->memory_hdc, data.hbm);
if (!BitBlt(renderdata->current_hdc, rect->x, rect->y, rect->w, rect->h,
renderdata->memory_hdc, 0, 0, SRCCOPY)) {
WIN_SetError("BitBlt()");
DeleteObject(data.hbm);
return -1;
}
DeleteObject(data.hbm);
return 0;
}
959
static void
960
GDI_RenderPresent(SDL_Renderer * renderer)
961
{
962
GDI_RenderData *data = (GDI_RenderData *) renderer->driverdata;
963
964
965
SDL_DirtyRect *dirty;
/* Send the data to the display */
966
if (!(renderer->info.flags & SDL_RENDERER_SINGLEBUFFER)) {
967
968
969
970
971
972
973
974
975
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 */
976
if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP2) {
977
978
data->current_hbm = (data->current_hbm + 1) % 2;
SelectObject(data->render_hdc, data->hbm[data->current_hbm]);
979
} else if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP3) {
980
981
982
data->current_hbm = (data->current_hbm + 1) % 3;
SelectObject(data->render_hdc, data->hbm[data->current_hbm]);
}
983
984
985
}
static void
986
GDI_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture)
987
{
988
GDI_TextureData *data = (GDI_TextureData *) texture->driverdata;
989
990
991
992
993
994
995
996
997
998
999
1000
if (!data) {
return;
}
if (data->yuv) {
SDL_SW_DestroyYUVTexture(data->yuv);
}
if (data->hpal) {
DeleteObject(data->hpal);
}
if (data->hbm) {
DeleteObject(data->hbm);