1 // $Id: sdl_renderer.cpp 5063 2007-05-27 11:32:00Z matzeb $
4 // Copyright (C) 2006 Matthias Braun <matze@braunis.de>
6 // This program is free software; you can redistribute it and/or
7 // modify it under the terms of the GNU General Public License
8 // as published by the Free Software Foundation; either version 2
9 // of the License, or (at your option) any later version.
11 // This program is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // You should have received a copy of the GNU General Public License
17 // along with this program; if not, write to the Free Software
18 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
26 #include <SDL_image.h>
32 #include "sdl_renderer.hpp"
33 #include "sdl_texture.hpp"
34 #include "sdl_surface_data.hpp"
35 #include "drawing_context.hpp"
36 #include "drawing_request.hpp"
37 #include "surface.hpp"
40 #include "gameconfig.hpp"
42 #include "texture.hpp"
43 #include "texture_manager.hpp"
44 #include "obstack/obstackpp.hpp"
48 SDL_Surface *apply_alpha(SDL_Surface *src, float alpha_factor)
50 // FIXME: This is really slow
51 assert(src->format->Amask);
52 int alpha = (int) (alpha_factor * 256);
53 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);
54 int bpp = dst->format->BytesPerPixel;
55 for(int y = 0;y < dst->h;y++) {
56 for(int x = 0;x < dst->w;x++) {
57 Uint8 *srcpixel = (Uint8 *) src->pixels + y * src->pitch + x * bpp;
58 Uint8 *dstpixel = (Uint8 *) dst->pixels + y * dst->pitch + x * bpp;
65 mapped = *(Uint16 *)srcpixel;
68 #if SDL_BYTEORDER == SDL_BIG_ENDIAN
69 mapped |= srcpixel[0] << 16;
70 mapped |= srcpixel[1] << 8;
71 mapped |= srcpixel[2] << 0;
73 mapped |= srcpixel[0] << 0;
74 mapped |= srcpixel[1] << 8;
75 mapped |= srcpixel[2] << 16;
79 mapped = *(Uint32 *)srcpixel;
83 SDL_GetRGBA(mapped, src->format, &r, &g, &b, &a);
84 mapped = SDL_MapRGBA(dst->format, r, g, b, (a * alpha) >> 8);
90 *(Uint16 *)dstpixel = mapped;
93 #if SDL_BYTEORDER == SDL_BIG_ENDIAN
94 dstpixel[0] = (mapped >> 16) & 0xff;
95 dstpixel[1] = (mapped >> 8) & 0xff;
96 dstpixel[2] = (mapped >> 0) & 0xff;
98 dstpixel[0] = (mapped >> 0) & 0xff;
99 dstpixel[1] = (mapped >> 8) & 0xff;
100 dstpixel[2] = (mapped >> 16) & 0xff;
104 *(Uint32 *)dstpixel = mapped;
117 const SDL_VideoInfo *info = SDL_GetVideoInfo();
118 log_info << "Hardware surfaces are " << (info->hw_available ? "" : "not ") << "available." << std::endl;
119 log_info << "Hardware to hardware blits are " << (info->blit_hw ? "" : "not ") << "accelerated." << std::endl;
120 log_info << "Hardware to hardware blits with colorkey are " << (info->blit_hw_CC ? "" : "not ") << "accelerated." << std::endl;
121 log_info << "Hardware to hardware blits with alpha are " << (info->blit_hw_A ? "" : "not ") << "accelerated." << std::endl;
122 log_info << "Software to hardware blits are " << (info->blit_sw ? "" : "not ") << "accelerated." << std::endl;
123 log_info << "Software to hardware blits with colorkey are " << (info->blit_sw_CC ? "" : "not ") << "accelerated." << std::endl;
124 log_info << "Software to hardware blits with alpha are " << (info->blit_sw_A ? "" : "not ") << "accelerated." << std::endl;
125 log_info << "Color fills are " << (info->blit_fill ? "" : "not ") << "accelerated." << std::endl;
127 int flags = SDL_SWSURFACE | SDL_ANYFORMAT;
128 if(config->use_fullscreen)
129 flags |= SDL_FULLSCREEN;
130 int width = config->screenwidth;
131 int height = config->screenheight;
133 screen = SDL_SetVideoMode(width, height, 0, flags);
135 std::stringstream msg;
136 msg << "Couldn't set video mode (" << width << "x" << height
137 << "): " << SDL_GetError();
138 throw std::runtime_error(msg.str());
141 float xfactor = (float) config->screenwidth / SCREEN_WIDTH;
142 float yfactor = (float) config->screenheight / SCREEN_HEIGHT;
143 if(xfactor < yfactor)
145 numerator = config->screenwidth;
146 denominator = SCREEN_WIDTH;
150 numerator = config->screenheight;
151 denominator = SCREEN_HEIGHT;
154 if(texture_manager == 0)
155 texture_manager = new TextureManager();
158 Renderer::~Renderer()
163 Renderer::draw_surface(const DrawingRequest& request)
165 //FIXME: support parameters request.alpha, request.angle, request.blend
166 const Surface* surface = (const Surface*) request.request_data;
167 SDL::Texture *sdltexture = dynamic_cast<SDL::Texture *>(surface->get_texture());
168 SDL::SurfaceData *surface_data = reinterpret_cast<SDL::SurfaceData *>(surface->get_surface_data());
170 DrawingEffect effect = request.drawing_effect;
171 if (surface->get_flipx()) effect = HORIZONTAL_FLIP;
173 SDL_Surface *transform = sdltexture->get_transform(request.color, effect);
175 // get and check SDL_Surface
176 if (transform == 0) {
177 std::cerr << "Warning: Tried to draw NULL surface, skipped draw" << std::endl;
181 SDL_Rect *src_rect = surface_data->get_src_rect(effect);
183 dst_rect.x = (int) request.pos.x * numerator / denominator;
184 dst_rect.y = (int) request.pos.y * numerator / denominator;
187 if(request.alpha != 1.0)
189 if(!transform->format->Amask)
191 if(transform->flags & SDL_SRCALPHA)
193 alpha = transform->format->alpha;
199 SDL_SetAlpha(transform, SDL_SRCALPHA, (Uint8) (request.alpha * alpha));
203 transform = apply_alpha(transform, request.alpha);
207 SDL_BlitSurface(transform, src_rect, screen, &dst_rect);
209 if(request.alpha != 1.0)
211 if(!transform->format->Amask)
215 SDL_SetAlpha(transform, 0, 0);
219 SDL_SetAlpha(transform, SDL_SRCALPHA, alpha);
224 SDL_FreeSurface(transform);
230 Renderer::draw_surface_part(const DrawingRequest& request)
232 const SurfacePartRequest* surfacepartrequest
233 = (SurfacePartRequest*) request.request_data;
235 const Surface* surface = surfacepartrequest->surface;
236 SDL::Texture *sdltexture = dynamic_cast<SDL::Texture *>(surface->get_texture());
238 DrawingEffect effect = request.drawing_effect;
239 if (surface->get_flipx()) effect = HORIZONTAL_FLIP;
241 SDL_Surface *transform = sdltexture->get_transform(Color(1.0, 1.0, 1.0), effect);
243 // get and check SDL_Surface
244 if (transform == 0) {
245 std::cerr << "Warning: Tried to draw NULL surface, skipped draw" << std::endl;
250 if (effect == HORIZONTAL_FLIP)
252 ox = sdltexture->get_texture_width() - surface->get_x() - (int) surfacepartrequest->size.x;
256 ox = surface->get_x();
258 if (effect == VERTICAL_FLIP)
260 oy = sdltexture->get_texture_height() - surface->get_y() - (int) surfacepartrequest->size.y;
264 oy = surface->get_y();
268 src_rect.x = (ox + (int) surfacepartrequest->source.x) * numerator / denominator;
269 src_rect.y = (oy + (int) surfacepartrequest->source.y) * numerator / denominator;
270 src_rect.w = (int) surfacepartrequest->size.x * numerator / denominator;
271 src_rect.h = (int) surfacepartrequest->size.y * numerator / denominator;
274 dst_rect.x = (int) request.pos.x * numerator / denominator;
275 dst_rect.y = (int) request.pos.y * numerator / denominator;
278 if(!(transform->flags & SDL_SRCALPHA))
281 SDL_SetAlpha(transform, SDL_SRCALPHA, (Uint8) (request.alpha * 255));
283 else if(!transform->format->Amask)
285 alpha = transform->format->alpha;
286 SDL_SetAlpha(transform, SDL_SRCALPHA, (Uint8) (request.alpha * alpha));
289 SDL_BlitSurface(transform, &src_rect, screen, &dst_rect);
293 SDL_SetAlpha(transform, 0, 0);
295 else if(!transform->format->Amask)
297 SDL_SetAlpha(transform, SDL_SRCALPHA, alpha);
302 Renderer::draw_gradient(const DrawingRequest& request)
304 const GradientRequest* gradientrequest
305 = (GradientRequest*) request.request_data;
306 const Color& top = gradientrequest->top;
307 const Color& bottom = gradientrequest->bottom;
309 for(int y = 0;y < screen->h;++y)
311 Uint8 r = (Uint8)((((float)(top.red-bottom.red)/(0-screen->h)) * y + top.red) * 255);
312 Uint8 g = (Uint8)((((float)(top.green-bottom.green)/(0-screen->h)) * y + top.green) * 255);
313 Uint8 b = (Uint8)((((float)(top.blue-bottom.blue)/(0-screen->h)) * y + top.blue) * 255);
314 Uint8 a = (Uint8)((((float)(top.alpha-bottom.alpha)/(0-screen->h)) * y + top.alpha) * 255);
315 Uint32 color = SDL_MapRGB(screen->format, r, g, b);
323 if(a == SDL_ALPHA_OPAQUE) {
324 SDL_FillRect(screen, &rect, color);
325 } else if(a != SDL_ALPHA_TRANSPARENT) {
326 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);
328 SDL_FillRect(temp, 0, color);
329 SDL_SetAlpha(temp, SDL_SRCALPHA, a);
330 SDL_BlitSurface(temp, 0, screen, &rect);
331 SDL_FreeSurface(temp);
337 Renderer::draw_text(const DrawingRequest& request)
339 const TextRequest* textrequest = (TextRequest*) request.request_data;
341 textrequest->font->draw(this, textrequest->text, request.pos,
342 textrequest->alignment, request.drawing_effect, request.alpha);
346 Renderer::draw_filled_rect(const DrawingRequest& request)
348 const FillRectRequest* fillrectrequest
349 = (FillRectRequest*) request.request_data;
352 rect.x = (Sint16)request.pos.x * screen->w / SCREEN_WIDTH;
353 rect.y = (Sint16)request.pos.y * screen->h / SCREEN_HEIGHT;
354 rect.w = (Uint16)fillrectrequest->size.x * screen->w / SCREEN_WIDTH;
355 rect.h = (Uint16)fillrectrequest->size.y * screen->h / SCREEN_HEIGHT;
356 Uint8 r = static_cast<Uint8>(fillrectrequest->color.red * 255);
357 Uint8 g = static_cast<Uint8>(fillrectrequest->color.green * 255);
358 Uint8 b = static_cast<Uint8>(fillrectrequest->color.blue * 255);
359 Uint8 a = static_cast<Uint8>(fillrectrequest->color.alpha * 255);
360 Uint32 color = SDL_MapRGB(screen->format, r, g, b);
361 if(a == SDL_ALPHA_OPAQUE) {
362 SDL_FillRect(screen, &rect, color);
363 } else if(a != SDL_ALPHA_TRANSPARENT) {
364 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);
366 SDL_FillRect(temp, 0, color);
367 SDL_SetAlpha(temp, SDL_SRCALPHA, a);
368 SDL_BlitSurface(temp, 0, screen, &rect);
369 SDL_FreeSurface(temp);
374 Renderer::do_take_screenshot()
376 // [Christoph] TODO: Yes, this method also takes care of the actual disk I/O. Split it?
378 SDL_Surface *screen = SDL_GetVideoSurface();
381 static const std::string writeDir = PHYSFS_getWriteDir();
382 static const std::string dirSep = PHYSFS_getDirSeparator();
383 static const std::string baseName = "screenshot";
384 static const std::string fileExt = ".bmp";
385 std::string fullFilename;
386 for (int num = 0; num < 1000; num++) {
387 std::ostringstream oss;
389 oss << std::setw(3) << std::setfill('0') << num;
391 std::string fileName = oss.str();
392 fullFilename = writeDir + dirSep + fileName;
393 if (!PHYSFS_exists(fileName.c_str())) {
394 SDL_SaveBMP(screen, fullFilename.c_str());
395 log_debug << "Wrote screenshot to \"" << fullFilename << "\"" << std::endl;
399 log_warning << "Did not save screenshot, because all files up to \"" << fullFilename << "\" already existed" << std::endl;