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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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/* 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_RenderPoint(SDL_Renderer * renderer, int x, int y);
static int GDI_RenderLine(SDL_Renderer * renderer, int x1, int y1, int x2,
int y2);
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static int GDI_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect);
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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 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;
LPBITMAPINFO bmi;
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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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SDL_AddRenderDriver(0, &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->RenderPoint = GDI_RenderPoint;
renderer->RenderLine = GDI_RenderLine;
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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;
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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);
/* 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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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 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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int bmi_size;
LPBITMAPINFO bmi;
bmi_size = sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD);
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bmi = (LPBITMAPINFO) SDL_calloc(1, bmi_size);
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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
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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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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;
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;
}
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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;
}
}
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} 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
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GDI_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, int markDirty, 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_LockYUVTexture(data->yuv, rect, markDirty, pixels,
pitch);
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} else if (data->pixels) {
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GdiFlush();
*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
GDI_RenderPoint(SDL_Renderer * renderer, int x, int y)
{
GDI_RenderData *data = (GDI_RenderData *) renderer->driverdata;
if (data->makedirty) {
SDL_Rect rect;
rect.x = x;
rect.y = y;
rect.w = 1;
rect.h = 1;
SDL_AddDirtyRect(&data->dirty, &rect);
}
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SetPixel(data->current_hdc, x, y,
RGB(renderer->r, renderer->g, renderer->b));
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return 0;
}
static int
GDI_RenderLine(SDL_Renderer * renderer, int x1, int y1, int x2, int y2)
{
GDI_RenderData *data = (GDI_RenderData *) renderer->driverdata;
POINT points[2];
HBRUSH brush;
BOOL status;
if (data->makedirty) {
SDL_Rect rect;
if (x1 < x2) {
rect.x = x1;
rect.w = (x2 - x1) + 1;
} else {
rect.x = x2;
rect.w = (x1 - x2) + 1;
}
if (y1 < y2) {
rect.y = y1;
rect.h = (y2 - y1) + 1;
} else {
rect.y = y2;
rect.h = (y1 - y2) + 1;
}
SDL_AddDirtyRect(&data->dirty, &rect);
}
/* Should we cache the brushes? .. it looks like GDI does for us. :) */
brush = CreateSolidBrush(RGB(renderer->r, renderer->g, renderer->b));
SelectObject(data->current_hdc, brush);
points[0].x = x1;
points[0].y = y1;
points[1].x = x2;
points[1].y = y2;
status = Polyline(data->current_hdc, points, 2);
DeleteObject(brush);
if (!status) {
WIN_SetError("FillRect()");
return -1;
}
return 0;
}
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static int
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GDI_RenderFill(SDL_Renderer * renderer, const SDL_Rect * rect)
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{
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GDI_RenderData *data = (GDI_RenderData *) renderer->driverdata;
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RECT rc;
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HBRUSH brush;
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int status;
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if (data->makedirty) {
SDL_AddDirtyRect(&data->dirty, rect);
}
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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. :) */
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brush = CreateSolidBrush(RGB(renderer->r, renderer->g, renderer->b));
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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
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GDI_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
748
const SDL_Rect * srcrect, const SDL_Rect * dstrect)
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{
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GDI_RenderData *data = (GDI_RenderData *) renderer->driverdata;
GDI_TextureData *texturedata = (GDI_TextureData *) texture->driverdata;
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if (data->makedirty) {
SDL_AddDirtyRect(&data->dirty, dstrect);
}
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SelectObject(data->memory_hdc, texturedata->hbm);
if (texturedata->hpal) {
SelectPalette(data->memory_hdc, texturedata->hpal, TRUE);
RealizePalette(data->memory_hdc);
}
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if (texture->blendMode & (SDL_BLENDMODE_MASK | SDL_BLENDMODE_BLEND)) {
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BLENDFUNCTION blendFunc = {
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AC_SRC_OVER,
0,
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texture->a,
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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;
}
} 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
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GDI_RenderPresent(SDL_Renderer * renderer)
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{
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GDI_RenderData *data = (GDI_RenderData *) renderer->driverdata;
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SDL_DirtyRect *dirty;
/* Send the data to the display */
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if (!(renderer->info.flags & SDL_RENDERER_SINGLEBUFFER)) {
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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 */
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if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP2) {
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data->current_hbm = (data->current_hbm + 1) % 2;
SelectObject(data->render_hdc, data->hbm[data->current_hbm]);
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} else if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP3) {
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data->current_hbm = (data->current_hbm + 1) % 3;
SelectObject(data->render_hdc, data->hbm[data->current_hbm]);
}
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}
static void
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GDI_DestroyTexture(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) {
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;
}
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static void
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GDI_DestroyRenderer(SDL_Renderer * renderer)
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{
848
GDI_RenderData *data = (GDI_RenderData *) renderer->driverdata;
849
int i;
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if (data) {
DeleteDC(data->render_hdc);
DeleteDC(data->memory_hdc);
if (data->bmi) {
SDL_free(data->bmi);
}
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for (i = 0; i < SDL_arraysize(data->hbm); ++i) {
if (data->hbm[i]) {
DeleteObject(data->hbm[i]);
}
}
SDL_FreeDirtyRects(&data->dirty);
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SDL_free(data);
}
SDL_free(renderer);
}
#endif /* SDL_VIDEO_RENDER_GDI */
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