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SDL_gdirender.c
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SDL_gdirender.c
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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2010 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_windowsvideo.h"
#include "../SDL_rect_c.h"
#include "../SDL_yuv_sw_c.h"
#include "../SDL_alphamult.h"
#ifdef _WIN32_WCE
#define NO_GETDIBBITS 1
#endif
/* GDI renderer implementation */
static SDL_Renderer *GDI_CreateRenderer(SDL_Window * window, Uint32 flags);
static int GDI_DisplayModeChanged(SDL_Renderer * renderer);
static int GDI_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture);
static int GDI_QueryTexturePixels(SDL_Renderer * renderer,
SDL_Texture * texture, void **pixels,
int *pitch);
static int GDI_SetTexturePalette(SDL_Renderer * renderer,
SDL_Texture * texture,
const SDL_Color * colors, int firstcolor,
int ncolors);
static int GDI_GetTexturePalette(SDL_Renderer * renderer,
SDL_Texture * texture, SDL_Color * colors,
int firstcolor, int ncolors);
static int GDI_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);
static int GDI_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, const void *pixels,
int pitch);
static int GDI_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, int markDirty,
void **pixels, int *pitch);
static void GDI_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture);
static int GDI_SetDrawBlendMode(SDL_Renderer * renderer);
static int GDI_RenderDrawPoints(SDL_Renderer * renderer,
const SDL_Point * points, int count);
static int GDI_RenderDrawLines(SDL_Renderer * renderer,
const SDL_Point * points, int count);
static int GDI_RenderDrawRects(SDL_Renderer * renderer,
const SDL_Rect ** rects, int count);
static int GDI_RenderFillRects(SDL_Renderer * renderer,
const SDL_Rect ** rects, int count);
static int GDI_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * srcrect, const SDL_Rect * dstrect);
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);
static void GDI_RenderPresent(SDL_Renderer * renderer);
static void GDI_DestroyTexture(SDL_Renderer * renderer,
SDL_Texture * texture);
static void GDI_DestroyRenderer(SDL_Renderer * renderer);
SDL_RenderDriver GDI_RenderDriver = {
GDI_CreateRenderer,
{
"gdi",
(SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTCOPY |
SDL_RENDERER_PRESENTFLIP2 | SDL_RENDERER_PRESENTFLIP3 |
SDL_RENDERER_PRESENTDISCARD | SDL_RENDERER_ACCELERATED),
(SDL_TEXTUREMODULATE_NONE | SDL_TEXTUREMODULATE_ALPHA),
(SDL_BLENDMODE_NONE | SDL_BLENDMODE_MASK),
(SDL_SCALEMODE_NONE | SDL_SCALEMODE_FAST),
14,
{
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_YV12,
SDL_PIXELFORMAT_IYUV,
SDL_PIXELFORMAT_YUY2,
SDL_PIXELFORMAT_UYVY,
SDL_PIXELFORMAT_YVYU},
0,
0}
};
typedef struct
{
HWND hwnd;
HDC window_hdc;
HDC render_hdc;
HDC memory_hdc;
HDC current_hdc;
#ifndef NO_GETDIBBITS
LPBITMAPINFO bmi;
#endif
HBITMAP hbm[3];
int current_hbm;
SDL_DirtyRectList dirty;
SDL_bool makedirty;
} GDI_RenderData;
typedef struct
{
SDL_SW_YUVTexture *yuv;
Uint32 format;
HPALETTE hpal;
HBITMAP hbm;
void *pixels;
int pitch;
SDL_bool premultiplied;
} GDI_TextureData;
static void
UpdateYUVTextureData(SDL_Texture * texture)
{
GDI_TextureData *data = (GDI_TextureData *) texture->driverdata;
SDL_Rect rect;
rect.x = 0;
rect.y = 0;
rect.w = texture->w;
rect.h = texture->h;
SDL_SW_CopyYUVToRGB(data->yuv, &rect, data->format, texture->w,
texture->h, data->pixels, data->pitch);
}
void
GDI_AddRenderDriver(_THIS)
{
int i;
for (i = 0; i < _this->num_displays; ++i) {
SDL_AddRenderDriver(&_this->displays[i], &GDI_RenderDriver);
}
}
SDL_Renderer *
GDI_CreateRenderer(SDL_Window * window, Uint32 flags)
{
SDL_WindowData *windowdata = (SDL_WindowData *) window->driverdata;
SDL_Renderer *renderer;
GDI_RenderData *data;
#ifndef NO_GETDIBBITS
int bmi_size;
HBITMAP hbm;
#endif
int i, n;
renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
if (!renderer) {
SDL_OutOfMemory();
return NULL;
}
data = (GDI_RenderData *) SDL_calloc(1, sizeof(*data));
if (!data) {
GDI_DestroyRenderer(renderer);
SDL_OutOfMemory();
return NULL;
}
windowdata->videodata->render = RENDER_GDI;
renderer->DisplayModeChanged = GDI_DisplayModeChanged;
renderer->CreateTexture = GDI_CreateTexture;
renderer->QueryTexturePixels = GDI_QueryTexturePixels;
renderer->SetTexturePalette = GDI_SetTexturePalette;
renderer->GetTexturePalette = GDI_GetTexturePalette;
renderer->SetTextureAlphaMod = GDI_SetTextureAlphaMod;
renderer->SetTextureBlendMode = GDI_SetTextureBlendMode;
renderer->SetTextureScaleMode = GDI_SetTextureScaleMode;
renderer->UpdateTexture = GDI_UpdateTexture;
renderer->LockTexture = GDI_LockTexture;
renderer->UnlockTexture = GDI_UnlockTexture;
renderer->SetDrawBlendMode = GDI_SetDrawBlendMode;
renderer->RenderDrawPoints = GDI_RenderDrawPoints;
renderer->RenderDrawLines = GDI_RenderDrawLines;
renderer->RenderDrawRects = GDI_RenderDrawRects;
renderer->RenderFillRects = GDI_RenderFillRects;
renderer->RenderCopy = GDI_RenderCopy;
renderer->RenderReadPixels = GDI_RenderReadPixels;
renderer->RenderWritePixels = GDI_RenderWritePixels;
renderer->RenderPresent = GDI_RenderPresent;
renderer->DestroyTexture = GDI_DestroyTexture;
renderer->DestroyRenderer = GDI_DestroyRenderer;
renderer->info = GDI_RenderDriver.info;
renderer->window = window;
renderer->driverdata = data;
renderer->info.flags = SDL_RENDERER_ACCELERATED;
data->hwnd = windowdata->hwnd;
data->window_hdc = windowdata->hdc;
data->render_hdc = CreateCompatibleDC(data->window_hdc);
data->memory_hdc = CreateCompatibleDC(data->window_hdc);
#ifndef NO_GETDIBBITS
/* Fill in the compatible bitmap info */
bmi_size = sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD);
data->bmi = (LPBITMAPINFO) SDL_calloc(1, bmi_size);
if (!data->bmi) {
GDI_DestroyRenderer(renderer);
SDL_OutOfMemory();
return NULL;
}
data->bmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
hbm = CreateCompatibleBitmap(data->window_hdc, 1, 1);
GetDIBits(data->window_hdc, hbm, 0, 1, NULL, data->bmi, DIB_RGB_COLORS);
GetDIBits(data->window_hdc, hbm, 0, 1, NULL, data->bmi, DIB_RGB_COLORS);
DeleteObject(hbm);
#endif
if (flags & SDL_RENDERER_SINGLEBUFFER) {
renderer->info.flags |=
(SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTCOPY);
n = 0;
} else if (flags & SDL_RENDERER_PRESENTFLIP2) {
renderer->info.flags |= SDL_RENDERER_PRESENTFLIP2;
n = 2;
} else if (flags & SDL_RENDERER_PRESENTFLIP3) {
renderer->info.flags |= SDL_RENDERER_PRESENTFLIP3;
n = 3;
} else {
renderer->info.flags |= SDL_RENDERER_PRESENTCOPY;
n = 1;
}
for (i = 0; i < n; ++i) {
data->hbm[i] =
CreateCompatibleBitmap(data->window_hdc, window->w, window->h);
if (!data->hbm[i]) {
GDI_DestroyRenderer(renderer);
WIN_SetError("CreateCompatibleBitmap()");
return NULL;
}
}
if (n > 0) {
SelectObject(data->render_hdc, data->hbm[0]);
data->current_hdc = data->render_hdc;
data->makedirty = SDL_TRUE;
} else {
data->current_hdc = data->window_hdc;
data->makedirty = SDL_FALSE;
}
data->current_hbm = 0;
#ifdef _WIN32_WCE
// check size for GDI fullscreen and rotate
if((window->flags & SDL_WINDOW_FULLSCREEN) &&
GetSystemMetrics(SM_CXSCREEN) != GetSystemMetrics(SM_CYSCREEN) &&
((GetSystemMetrics(SM_CXSCREEN) < GetSystemMetrics(SM_CYSCREEN) && window->w > window->h) ||
(GetSystemMetrics(SM_CXSCREEN) > GetSystemMetrics(SM_CYSCREEN) && window->w < window->h)))
{
int orientation = WINCE_GetDMOrientation();
switch(orientation)
{
case DMDO_0: orientation = DMDO_90; break;
case DMDO_270: orientation = DMDO_180; break;
case DMDO_90: orientation = DMDO_0; break;
case DMDO_180: orientation = DMDO_270; break;
default:
GDI_DestroyRenderer(renderer);
return NULL;
}
if(0 > WINCE_SetDMOrientation(orientation))
{
GDI_DestroyRenderer(renderer);
return NULL;
}
}
#endif
return renderer;
}
static int
GDI_DisplayModeChanged(SDL_Renderer * renderer)
{
GDI_RenderData *data = (GDI_RenderData *) renderer->driverdata;
SDL_Window *window = 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]);
}
data->current_hbm = 0;
return 0;
}
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);
}
static int
GDI_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
GDI_RenderData *renderdata = (GDI_RenderData *) renderer->driverdata;
SDL_Window *window = renderer->window;
SDL_VideoDisplay *display = window->display;
GDI_TextureData *data;
data = (GDI_TextureData *) SDL_calloc(1, sizeof(*data));
if (!data) {
SDL_OutOfMemory();
return -1;
}
texture->driverdata = data;
if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
data->yuv =
SDL_SW_CreateYUVTexture(texture->format, texture->w, texture->h);
if (!data->yuv) {
return -1;
}
data->format = display->current_mode.format;
} else {
data->format = texture->format;
}
data->pitch = (texture->w * SDL_BYTESPERPIXEL(data->format));
if (data->yuv || texture->access == SDL_TEXTUREACCESS_STREAMING
|| texture->format != display->current_mode.format) {
data->hbm = GDI_CreateDIBSection(renderdata->memory_hdc,
texture->w, texture->h,
data->pitch, data->format,
&data->hpal, &data->pixels);
} else {
data->hbm = CreateCompatibleBitmap(renderdata->window_hdc,
texture->w, texture->h);
}
if (!data->hbm) {
WIN_SetError("Couldn't create bitmap");
return -1;
}
return 0;
}
static int
GDI_QueryTexturePixels(SDL_Renderer * renderer, SDL_Texture * texture,
void **pixels, int *pitch)
{
GDI_TextureData *data = (GDI_TextureData *) texture->driverdata;
if (data->yuv) {
return SDL_SW_QueryYUVTexturePixels(data->yuv, pixels, pitch);
} else {
*pixels = data->pixels;
*pitch = data->pitch;
return 0;
}
}
static int
GDI_SetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Color * colors, int firstcolor, int ncolors)
{
GDI_RenderData *renderdata = (GDI_RenderData *) renderer->driverdata;
GDI_TextureData *data = (GDI_TextureData *) texture->driverdata;
if (data->yuv) {
SDL_SetError("YUV textures don't have a palette");
return -1;
} else {
PALETTEENTRY entries[256];
int i;
for (i = 0; i < ncolors; ++i) {
entries[i].peRed = colors[i].r;
entries[i].peGreen = colors[i].g;
entries[i].peBlue = colors[i].b;
entries[i].peFlags = 0;
}
if (!SetPaletteEntries(data->hpal, firstcolor, ncolors, entries)) {
WIN_SetError("SetPaletteEntries()");
return -1;
}
return 0;
}
}
static int
GDI_GetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
SDL_Color * colors, int firstcolor, int ncolors)
{
GDI_TextureData *data = (GDI_TextureData *) texture->driverdata;
if (data->yuv) {
SDL_SetError("YUV textures don't have a palette");
return -1;
} else {
PALETTEENTRY entries[256];
int i;
if (!GetPaletteEntries(data->hpal, firstcolor, ncolors, entries)) {
WIN_SetError("GetPaletteEntries()");
return -1;
}
for (i = 0; i < ncolors; ++i) {
colors[i].r = entries[i].peRed;
colors[i].g = entries[i].peGreen;
colors[i].b = entries[i].peBlue;
}
return 0;
}
}
static int
GDI_SetTextureAlphaMod(SDL_Renderer * renderer, SDL_Texture * texture)
{
return 0;
}
static int
GDI_SetTextureBlendMode(SDL_Renderer * renderer, SDL_Texture * texture)
{
GDI_TextureData *data = (GDI_TextureData *) texture->driverdata;
switch (texture->blendMode) {
case SDL_BLENDMODE_NONE:
if (data->premultiplied) {
/* Crap, we've lost the original pixel data... *sigh* */
}
return 0;
#ifndef _WIN32_WCE /* WinCE has no alphablend */
case SDL_BLENDMODE_MASK:
case SDL_BLENDMODE_BLEND:
if (!data->premultiplied && data->pixels) {
switch (texture->format) {
case SDL_PIXELFORMAT_ARGB8888:
SDL_PreMultiplyAlphaARGB8888(texture->w, texture->h,
(Uint32 *) data->pixels,
data->pitch);
data->premultiplied = SDL_TRUE;
break;
case SDL_PIXELFORMAT_RGBA8888:
SDL_PreMultiplyAlphaRGBA8888(texture->w, texture->h,
(Uint32 *) data->pixels,
data->pitch);
data->premultiplied = SDL_TRUE;
break;
case SDL_PIXELFORMAT_ABGR8888:
SDL_PreMultiplyAlphaABGR8888(texture->w, texture->h,
(Uint32 *) data->pixels,
data->pitch);
data->premultiplied = SDL_TRUE;
break;
case SDL_PIXELFORMAT_BGRA8888:
SDL_PreMultiplyAlphaBGRA8888(texture->w, texture->h,
(Uint32 *) data->pixels,
data->pitch);
data->premultiplied = SDL_TRUE;
break;
}
}
return 0;
#endif
default:
SDL_Unsupported();
texture->blendMode = SDL_BLENDMODE_NONE;
return -1;
}
}
static int
GDI_SetTextureScaleMode(SDL_Renderer * renderer, SDL_Texture * texture)
{
switch (texture->scaleMode) {
case SDL_SCALEMODE_NONE:
case SDL_SCALEMODE_FAST:
return 0;
case SDL_SCALEMODE_SLOW:
case SDL_SCALEMODE_BEST:
SDL_Unsupported();
texture->scaleMode = SDL_SCALEMODE_FAST;
return -1;
default:
SDL_Unsupported();
texture->scaleMode = SDL_SCALEMODE_NONE;
return -1;
}
return 0;
}
static int
GDI_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, const void *pixels, int pitch)
{
GDI_TextureData *data = (GDI_TextureData *) texture->driverdata;
if (data->yuv) {
if (SDL_SW_UpdateYUVTexture(data->yuv, rect, pixels, pitch) < 0) {
return -1;
}
UpdateYUVTextureData(texture);
return 0;
} else {
GDI_RenderData *renderdata = (GDI_RenderData *) renderer->driverdata;
if (data->pixels) {
Uint8 *src, *dst;
int row;
size_t length;
src = (Uint8 *) pixels;
dst =
(Uint8 *) data->pixels + rect->y * data->pitch +
rect->x * SDL_BYTESPERPIXEL(texture->format);
length = rect->w * SDL_BYTESPERPIXEL(texture->format);
for (row = 0; row < rect->h; ++row) {
SDL_memcpy(dst, src, length);
src += pitch;
dst += data->pitch;
}
if (data->premultiplied) {
Uint32 *pixels =
(Uint32 *) data->pixels + rect->y * (data->pitch / 4) +
rect->x;
switch (texture->format) {
case SDL_PIXELFORMAT_ARGB8888:
SDL_PreMultiplyAlphaARGB8888(rect->w, rect->h, pixels,
data->pitch);
break;
case SDL_PIXELFORMAT_RGBA8888:
SDL_PreMultiplyAlphaRGBA8888(rect->w, rect->h, pixels,
data->pitch);
break;
case SDL_PIXELFORMAT_ABGR8888:
SDL_PreMultiplyAlphaABGR8888(rect->w, rect->h, pixels,
data->pitch);
break;
case SDL_PIXELFORMAT_BGRA8888:
SDL_PreMultiplyAlphaBGRA8888(rect->w, rect->h, pixels,
data->pitch);
break;
}
}
} else if (rect->w == texture->w && pitch == data->pitch) {
#ifndef NO_GETDIBBITS
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: Update Texture");
return -1;
#endif
} else {
SDL_SetError
("FIXME: Need to allocate temporary memory and do GetDIBits() followed by SetDIBits(), since we can only set blocks of scanlines at a time");
return -1;
}
return 0;
}
}
static int
GDI_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, int markDirty, void **pixels,
int *pitch)
{
GDI_TextureData *data = (GDI_TextureData *) texture->driverdata;
if (data->yuv) {
return SDL_SW_LockYUVTexture(data->yuv, rect, markDirty, pixels,
pitch);
} else if (data->pixels) {
#ifndef _WIN32_WCE
/* WinCE has no GdiFlush */
GdiFlush();
#endif
*pixels =
(void *) ((Uint8 *) data->pixels + rect->y * data->pitch +
rect->x * SDL_BYTESPERPIXEL(texture->format));
*pitch = data->pitch;
return 0;
} else {
SDL_SetError("No pixels available");
return -1;
}
}
static void
GDI_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
GDI_TextureData *data = (GDI_TextureData *) texture->driverdata;
if (data->yuv) {
SDL_SW_UnlockYUVTexture(data->yuv);
UpdateYUVTextureData(texture);
}
}
static 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;
}
}
static int
GDI_RenderDrawPoints(SDL_Renderer * renderer, const SDL_Point * points,
int count)
{
GDI_RenderData *data = (GDI_RenderData *) renderer->driverdata;
int i;
COLORREF color;
if (data->makedirty) {
/* Get the smallest rectangle that contains everything */
SDL_Window *window = renderer->window;
SDL_Rect rect;
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;
}
SDL_AddDirtyRect(&data->dirty, &rect);
}
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);
}
return 0;
}
static int
GDI_RenderDrawLines(SDL_Renderer * renderer, const SDL_Point * points,
int count)
{
GDI_RenderData *data = (GDI_RenderData *) renderer->driverdata;
HPEN pen;
BOOL status;
if (data->makedirty) {
/* Get the smallest rectangle that contains everything */
SDL_Window *window = 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;
}
SDL_AddDirtyRect(&data->dirty, &rect);
}
/* 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);
{
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);
}
DeleteObject(pen);
/* Need to close the endpoint of the line */
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));
}
if (!status) {
WIN_SetError("Polyline()");
return -1;
}
return 0;
}
static int
GDI_RenderDrawRects(SDL_Renderer * renderer, const SDL_Rect ** rects,
int count)
{
GDI_RenderData *data = (GDI_RenderData *) renderer->driverdata;
HPEN pen;
POINT vertices[5];
int i, status = 1;
if (data->makedirty) {
SDL_Window *window = renderer->window;
SDL_Rect clip, rect;
clip.x = 0;
clip.y = 0;
clip.w = window->w;
clip.h = window->h;
for (i = 0; i < count; ++i) {
if (SDL_IntersectRect(rects[i], &clip, &rect)) {
SDL_AddDirtyRect(&data->dirty, &rect);
}
}
}
/* 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);
for (i = 0; i < count; ++i) {
const SDL_Rect *rect = rects[i];
vertices[0].x = rect->x;
vertices[0].y = rect->y;
vertices[1].x = rect->x+rect->w-1;
vertices[1].y = rect->y;
vertices[2].x = rect->x+rect->w-1;
vertices[2].y = rect->y+rect->h-1;
vertices[3].x = rect->x;
vertices[3].y = rect->y+rect->h-1;
vertices[4].x = rect->x;
vertices[4].y = rect->y;
status &= Polyline(data->current_hdc, vertices, 5);
}
DeleteObject(pen);
if (!status) {
WIN_SetError("Polyline()");
return -1;
}
return 0;
}
static int
GDI_RenderFillRects(SDL_Renderer * renderer, const SDL_Rect ** rects,
int count)
{
GDI_RenderData *data = (GDI_RenderData *) renderer->driverdata;
RECT rc;
HBRUSH brush;
int i, status = 1;
if (data->makedirty) {
SDL_Window *window = renderer->window;
SDL_Rect clip, rect;
clip.x = 0;
clip.y = 0;
clip.w = window->w;
clip.h = window->h;
for (i = 0; i < count; ++i) {
if (SDL_IntersectRect(rects[i], &clip, &rect)) {
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);
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);
}
DeleteObject(brush);
if (!status) {
WIN_SetError("FillRect()");
return -1;
}
return 0;
}
static int
GDI_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * srcrect, const SDL_Rect * dstrect)
{
GDI_RenderData *data = (GDI_RenderData *) renderer->driverdata;
GDI_TextureData *texturedata = (GDI_TextureData *) texture->driverdata;
if (data->makedirty) {
SDL_AddDirtyRect(&data->dirty, dstrect);
}
SelectObject(data->memory_hdc, texturedata->hbm);
if (texturedata->hpal) {
SelectPalette(data->memory_hdc, texturedata->hpal, TRUE);
RealizePalette(data->memory_hdc);
}
if (texture->blendMode & (SDL_BLENDMODE_MASK | SDL_BLENDMODE_BLEND)) {
#ifdef _WIN32_WCE
SDL_SetError("Texture has blendmode not supported under WinCE");
return -1;
#else
BLENDFUNCTION blendFunc = {
AC_SRC_OVER,
0,
texture->a,
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;
}
#endif
} 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
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 = renderer->window;
SDL_VideoDisplay *display = window->display;
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,