SDL_Renderer *
SW_CreateRendererForSurface(SDL_Surface * surface)
{
SDL_Renderer *renderer;
SW_RenderData *data;
if (!surface) {
SDL_SetError("Can't create renderer for NULL surface");
return NULL;
}
renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
if (!renderer) {
SDL_OutOfMemory();
return NULL;
}
data = (SW_RenderData *) SDL_calloc(1, sizeof(*data));
if (!data) {
SW_DestroyRenderer(renderer);
SDL_OutOfMemory();
return NULL;
}
data->surface = surface;
renderer->WindowEvent = SW_WindowEvent;
renderer->CreateTexture = SW_CreateTexture;
renderer->SetTextureColorMod = SW_SetTextureColorMod;
renderer->SetTextureAlphaMod = SW_SetTextureAlphaMod;
renderer->SetTextureBlendMode = SW_SetTextureBlendMode;
renderer->UpdateTexture = SW_UpdateTexture;
renderer->LockTexture = SW_LockTexture;
renderer->UnlockTexture = SW_UnlockTexture;
renderer->SetRenderTarget = SW_SetRenderTarget;
renderer->UpdateViewport = SW_UpdateViewport;
renderer->RenderClear = SW_RenderClear;
renderer->RenderDrawPoints = SW_RenderDrawPoints;
renderer->RenderDrawLines = SW_RenderDrawLines;
renderer->RenderFillRects = SW_RenderFillRects;
renderer->RenderCopy = SW_RenderCopy;
renderer->RenderCopyEx = SW_RenderCopyEx;
renderer->RenderReadPixels = SW_RenderReadPixels;
renderer->RenderPresent = SW_RenderPresent;
renderer->DestroyTexture = SW_DestroyTexture;
renderer->DestroyRenderer = SW_DestroyRenderer;
renderer->info = SW_RenderDriver.info;
renderer->driverdata = data;
SW_ActivateRenderer(renderer);
return renderer;
}
SDL_Renderer *
SW_CreateRenderer(SDL_Window * window, Uint32 flags)
{
SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
SDL_DisplayMode *displayMode = &display->current_mode;
SDL_Renderer *renderer;
SW_RenderData *data;
int i, n;
int bpp;
Uint32 Rmask, Gmask, Bmask, Amask;
Uint32 renderer_flags;
const char *desired_driver;
if (!SDL_PixelFormatEnumToMasks
(displayMode->format, &bpp, &Rmask, &Gmask, &Bmask, &Amask)) {
SDL_SetError("Unknown display format");
return NULL;
}
renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
if (!renderer) {
SDL_OutOfMemory();
return NULL;
}
data = (SW_RenderData *) SDL_calloc(1, sizeof(*data));
if (!data) {
SW_DestroyRenderer(renderer);
SDL_OutOfMemory();
return NULL;
}
renderer->ActivateRenderer = SW_ActivateRenderer;
renderer->DisplayModeChanged = SW_DisplayModeChanged;
renderer->RenderPoint = SW_RenderPoint;
renderer->RenderLine = SW_RenderLine;
renderer->RenderFill = SW_RenderFill;
renderer->RenderCopy = SW_RenderCopy;
renderer->RenderPresent = SW_RenderPresent;
renderer->DestroyRenderer = SW_DestroyRenderer;
renderer->info.name = SW_RenderDriver.info.name;
renderer->info.flags = 0;
renderer->window = window->id;
renderer->driverdata = data;
Setup_SoftwareRenderer(renderer);
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;
}
data->format = displayMode->format;
/* Find a render driver that we can use to display data */
renderer_flags = (SDL_RENDERER_SINGLEBUFFER |
SDL_RENDERER_PRESENTDISCARD);
if (flags & SDL_RENDERER_PRESENTVSYNC) {
renderer_flags |= SDL_RENDERER_PRESENTVSYNC;
}
desired_driver = SDL_getenv("SDL_VIDEO_RENDERER_SWDRIVER");
for (i = 0; i < display->num_render_drivers; ++i) {
SDL_RenderDriver *driver = &display->render_drivers[i];
if (driver->info.name == SW_RenderDriver.info.name) {
continue;
}
if (desired_driver
&& SDL_strcasecmp(desired_driver, driver->info.name) != 0) {
continue;
}
data->renderer = driver->CreateRenderer(window, renderer_flags);
if (data->renderer) {
break;
}
}
if (i == display->num_render_drivers) {
SW_DestroyRenderer(renderer);
SDL_SetError("Couldn't find display render driver");
return NULL;
}
if (data->renderer->info.flags & SDL_RENDERER_PRESENTVSYNC) {
renderer->info.flags |= SDL_RENDERER_PRESENTVSYNC;
}
/* Create the textures we'll use for display */
for (i = 0; i < n; ++i) {
data->texture[i] =
CreateTexture(data->renderer, data->format, window->w, window->h);
if (!data->texture[i]) {
SW_DestroyRenderer(renderer);
return NULL;
}
}
data->current_texture = 0;
/* Create a surface we'll use for rendering */
data->surface.flags = SDL_PREALLOC;
data->surface.format = SDL_AllocFormat(bpp, Rmask, Gmask, Bmask, Amask);
if (!data->surface.format) {
SW_DestroyRenderer(renderer);
return NULL;
}
SDL_SetSurfacePalette(&data->surface, display->palette);
/* Set up a palette watch on the display palette */
if (display->palette) {
SDL_AddPaletteWatch(display->palette, DisplayPaletteChanged, data);
}
return renderer;
}