2 // Copyright (C) 2006 Matthias Braun <matze@braunis.de>
4 // This program is free software: you can redistribute it and/or modify
5 // it under the terms of the GNU General Public License as published by
6 // the Free Software Foundation, either version 3 of the License, or
7 // (at your option) any later version.
9 // This program is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // You should have received a copy of the GNU General Public License
15 // along with this program. If not, see <http://www.gnu.org/licenses/>.
17 #include "video/sdl/sdl_renderer.hpp"
19 #include "video/drawing_request.hpp"
20 #include "video/sdl/sdl_surface_data.hpp"
21 #include "video/sdl/sdl_texture.hpp"
31 SDL_Surface *apply_alpha(SDL_Surface *src, float alpha_factor)
33 // FIXME: This is really slow
34 assert(src->format->Amask);
35 int alpha = (int) (alpha_factor * 256);
36 SDL_Surface *dst = SDL_CreateRGBSurface(src->flags, src->w, src->h, src->format->BitsPerPixel, src->format->Rmask, src->format->Gmask, src->format->Bmask, src->format->Amask);
37 int bpp = dst->format->BytesPerPixel;
46 for(int y = 0;y < dst->h;y++) {
47 for(int x = 0;x < dst->w;x++) {
48 Uint8 *srcpixel = (Uint8 *) src->pixels + y * src->pitch + x * bpp;
49 Uint8 *dstpixel = (Uint8 *) dst->pixels + y * dst->pitch + x * bpp;
56 mapped = *(Uint16 *)srcpixel;
59 #if SDL_BYTEORDER == SDL_BIG_ENDIAN
60 mapped |= srcpixel[0] << 16;
61 mapped |= srcpixel[1] << 8;
62 mapped |= srcpixel[2] << 0;
64 mapped |= srcpixel[0] << 0;
65 mapped |= srcpixel[1] << 8;
66 mapped |= srcpixel[2] << 16;
70 mapped = *(Uint32 *)srcpixel;
74 SDL_GetRGBA(mapped, src->format, &r, &g, &b, &a);
75 mapped = SDL_MapRGBA(dst->format, r, g, b, (a * alpha) >> 8);
81 *(Uint16 *)dstpixel = mapped;
84 #if SDL_BYTEORDER == SDL_BIG_ENDIAN
85 dstpixel[0] = (mapped >> 16) & 0xff;
86 dstpixel[1] = (mapped >> 8) & 0xff;
87 dstpixel[2] = (mapped >> 0) & 0xff;
89 dstpixel[0] = (mapped >> 0) & 0xff;
90 dstpixel[1] = (mapped >> 8) & 0xff;
91 dstpixel[2] = (mapped >> 16) & 0xff;
95 *(Uint32 *)dstpixel = mapped;
100 if(SDL_MUSTLOCK(dst))
102 SDL_UnlockSurface(dst);
104 if(SDL_MUSTLOCK(src))
106 SDL_UnlockSurface(src);
113 SDLRenderer::SDLRenderer() :
118 Renderer::instance_ = this;
120 const SDL_VideoInfo *info = SDL_GetVideoInfo();
121 log_info << "Hardware surfaces are " << (info->hw_available ? "" : "not ") << "available." << std::endl;
122 log_info << "Hardware to hardware blits are " << (info->blit_hw ? "" : "not ") << "accelerated." << std::endl;
123 log_info << "Hardware to hardware blits with colorkey are " << (info->blit_hw_CC ? "" : "not ") << "accelerated." << std::endl;
124 log_info << "Hardware to hardware blits with alpha are " << (info->blit_hw_A ? "" : "not ") << "accelerated." << std::endl;
125 log_info << "Software to hardware blits are " << (info->blit_sw ? "" : "not ") << "accelerated." << std::endl;
126 log_info << "Software to hardware blits with colorkey are " << (info->blit_sw_CC ? "" : "not ") << "accelerated." << std::endl;
127 log_info << "Software to hardware blits with alpha are " << (info->blit_sw_A ? "" : "not ") << "accelerated." << std::endl;
128 log_info << "Color fills are " << (info->blit_fill ? "" : "not ") << "accelerated." << std::endl;
130 int flags = SDL_SWSURFACE | SDL_ANYFORMAT;
131 if(g_config->use_fullscreen)
132 flags |= SDL_FULLSCREEN;
134 int width = 800; //FIXME: config->screenwidth;
135 int height = 600; //FIXME: config->screenheight;
137 screen = SDL_SetVideoMode(width, height, 0, flags);
139 std::stringstream msg;
140 msg << "Couldn't set video mode (" << width << "x" << height
141 << "): " << SDL_GetError();
142 throw std::runtime_error(msg.str());
148 float xfactor = (float) config->screenwidth / SCREEN_WIDTH;
149 float yfactor = (float) config->screenheight / SCREEN_HEIGHT;
150 if(xfactor < yfactor)
152 numerator = config->screenwidth;
153 denominator = SCREEN_WIDTH;
157 numerator = config->screenheight;
158 denominator = SCREEN_HEIGHT;
161 if(texture_manager == 0)
162 texture_manager = new TextureManager();
165 SDLRenderer::~SDLRenderer()
170 SDLRenderer::draw_surface(const DrawingRequest& request)
172 //FIXME: support parameters request.alpha, request.angle, request.blend
173 const Surface* surface = (const Surface*) request.request_data;
174 boost::shared_ptr<SDLTexture> sdltexture = boost::dynamic_pointer_cast<SDLTexture>(surface->get_texture());
175 SDLSurfaceData *surface_data = reinterpret_cast<SDLSurfaceData *>(surface->get_surface_data());
177 DrawingEffect effect = request.drawing_effect;
178 if (surface->get_flipx()) effect = HORIZONTAL_FLIP;
180 SDL_Surface *transform = sdltexture->get_transform(request.color, effect);
182 // get and check SDL_Surface
183 if (transform == 0) {
184 std::cerr << "Warning: Tried to draw NULL surface, skipped draw" << std::endl;
188 SDL_Rect *src_rect = surface_data->get_src_rect(effect);
190 dst_rect.x = (int) request.pos.x * numerator / denominator;
191 dst_rect.y = (int) request.pos.y * numerator / denominator;
194 if(request.alpha != 1.0)
196 if(!transform->format->Amask)
198 if(transform->flags & SDL_SRCALPHA)
200 alpha = transform->format->alpha;
206 SDL_SetAlpha(transform, SDL_SRCALPHA, (Uint8) (request.alpha * alpha));
210 transform = apply_alpha(transform, request.alpha);
214 SDL_BlitSurface(transform, src_rect, screen, &dst_rect);
216 if(request.alpha != 1.0)
218 if(!transform->format->Amask)
222 SDL_SetAlpha(transform, SDL_RLEACCEL, 0);
226 SDL_SetAlpha(transform, SDL_SRCALPHA | SDL_RLEACCEL, alpha);
231 SDL_FreeSurface(transform);
237 SDLRenderer::draw_surface_part(const DrawingRequest& request)
239 const SurfacePartRequest* surfacepartrequest
240 = (SurfacePartRequest*) request.request_data;
242 const Surface* surface = surfacepartrequest->surface;
243 boost::shared_ptr<SDLTexture> sdltexture = boost::dynamic_pointer_cast<SDLTexture>(surface->get_texture());
245 DrawingEffect effect = request.drawing_effect;
246 if (surface->get_flipx()) effect = HORIZONTAL_FLIP;
248 SDL_Surface *transform = sdltexture->get_transform(request.color, effect);
250 // get and check SDL_Surface
251 if (transform == 0) {
252 std::cerr << "Warning: Tried to draw NULL surface, skipped draw" << std::endl;
257 if (effect == HORIZONTAL_FLIP)
259 ox = sdltexture->get_texture_width() - surface->get_x() - (int) surfacepartrequest->size.x;
263 ox = surface->get_x();
265 if (effect == VERTICAL_FLIP)
267 oy = sdltexture->get_texture_height() - surface->get_y() - (int) surfacepartrequest->size.y;
271 oy = surface->get_y();
275 src_rect.x = (ox + (int) surfacepartrequest->source.x) * numerator / denominator;
276 src_rect.y = (oy + (int) surfacepartrequest->source.y) * numerator / denominator;
277 src_rect.w = (int) surfacepartrequest->size.x * numerator / denominator;
278 src_rect.h = (int) surfacepartrequest->size.y * numerator / denominator;
281 dst_rect.x = (int) request.pos.x * numerator / denominator;
282 dst_rect.y = (int) request.pos.y * numerator / denominator;
285 if(request.alpha != 1.0)
287 if(!transform->format->Amask)
289 if(transform->flags & SDL_SRCALPHA)
291 alpha = transform->format->alpha;
297 SDL_SetAlpha(transform, SDL_SRCALPHA, (Uint8) (request.alpha * alpha));
301 transform = apply_alpha(transform, request.alpha);
305 SDL_BlitSurface(transform, &src_rect, screen, &dst_rect);
307 if(request.alpha != 1.0)
309 if(!transform->format->Amask)
313 SDL_SetAlpha(transform, SDL_RLEACCEL, 0);
317 SDL_SetAlpha(transform, SDL_SRCALPHA | SDL_RLEACCEL, alpha);
322 SDL_FreeSurface(transform);
328 SDLRenderer::draw_gradient(const DrawingRequest& request)
330 const GradientRequest* gradientrequest
331 = (GradientRequest*) request.request_data;
332 const Color& top = gradientrequest->top;
333 const Color& bottom = gradientrequest->bottom;
335 for(int y = 0;y < screen->h;++y)
337 Uint8 r = (Uint8)((((float)(top.red-bottom.red)/(0-screen->h)) * y + top.red) * 255);
338 Uint8 g = (Uint8)((((float)(top.green-bottom.green)/(0-screen->h)) * y + top.green) * 255);
339 Uint8 b = (Uint8)((((float)(top.blue-bottom.blue)/(0-screen->h)) * y + top.blue) * 255);
340 Uint8 a = (Uint8)((((float)(top.alpha-bottom.alpha)/(0-screen->h)) * y + top.alpha) * 255);
341 Uint32 color = SDL_MapRGB(screen->format, r, g, b);
349 if(a == SDL_ALPHA_OPAQUE) {
350 SDL_FillRect(screen, &rect, color);
351 } else if(a != SDL_ALPHA_TRANSPARENT) {
352 SDL_Surface *temp = SDL_CreateRGBSurface(screen->flags, rect.w, rect.h, screen->format->BitsPerPixel, screen->format->Rmask, screen->format->Gmask, screen->format->Bmask, screen->format->Amask);
354 SDL_FillRect(temp, 0, color);
355 SDL_SetAlpha(temp, SDL_SRCALPHA | SDL_RLEACCEL, a);
356 SDL_BlitSurface(temp, 0, screen, &rect);
357 SDL_FreeSurface(temp);
363 SDLRenderer::draw_filled_rect(const DrawingRequest& request)
365 const FillRectRequest* fillrectrequest
366 = (FillRectRequest*) request.request_data;
369 rect.x = (Sint16)request.pos.x * screen->w / SCREEN_WIDTH;
370 rect.y = (Sint16)request.pos.y * screen->h / SCREEN_HEIGHT;
371 rect.w = (Uint16)fillrectrequest->size.x * screen->w / SCREEN_WIDTH;
372 rect.h = (Uint16)fillrectrequest->size.y * screen->h / SCREEN_HEIGHT;
373 if((rect.w == 0) || (rect.h == 0)) {
376 Uint8 r = static_cast<Uint8>(fillrectrequest->color.red * 255);
377 Uint8 g = static_cast<Uint8>(fillrectrequest->color.green * 255);
378 Uint8 b = static_cast<Uint8>(fillrectrequest->color.blue * 255);
379 Uint8 a = static_cast<Uint8>(fillrectrequest->color.alpha * 255);
380 Uint32 color = SDL_MapRGB(screen->format, r, g, b);
381 if(a == SDL_ALPHA_OPAQUE) {
382 SDL_FillRect(screen, &rect, color);
383 } else if(a != SDL_ALPHA_TRANSPARENT) {
384 SDL_Surface *temp = SDL_CreateRGBSurface(screen->flags, rect.w, rect.h, screen->format->BitsPerPixel, screen->format->Rmask, screen->format->Gmask, screen->format->Bmask, screen->format->Amask);
386 SDL_FillRect(temp, 0, color);
387 SDL_SetAlpha(temp, SDL_SRCALPHA | SDL_RLEACCEL, a);
388 SDL_BlitSurface(temp, 0, screen, &rect);
389 SDL_FreeSurface(temp);
394 SDLRenderer::draw_inverse_ellipse(const DrawingRequest&)
399 SDLRenderer::do_take_screenshot()
401 // [Christoph] TODO: Yes, this method also takes care of the actual disk I/O. Split it?
403 SDL_Surface *screen = SDL_GetVideoSurface();
406 static const std::string writeDir = PHYSFS_getWriteDir();
407 static const std::string dirSep = PHYSFS_getDirSeparator();
408 static const std::string baseName = "screenshot";
409 static const std::string fileExt = ".bmp";
410 std::string fullFilename;
411 for (int num = 0; num < 1000; num++) {
412 std::ostringstream oss;
414 oss << std::setw(3) << std::setfill('0') << num;
416 std::string fileName = oss.str();
417 fullFilename = writeDir + dirSep + fileName;
418 if (!PHYSFS_exists(fileName.c_str())) {
419 SDL_SaveBMP(screen, fullFilename.c_str());
420 log_debug << "Wrote screenshot to \"" << fullFilename << "\"" << std::endl;
424 log_warning << "Did not save screenshot, because all files up to \"" << fullFilename << "\" already existed" << std::endl;
434 SDLRenderer::resize(int, int)