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"
50 const SDL_VideoInfo *info = SDL_GetVideoInfo();
51 log_info << "Hardware surfaces are " << (info->hw_available ? "" : "not ") << "available." << std::endl;
52 log_info << "Hardware to hardware blits are " << (info->blit_hw ? "" : "not ") << "accelerated." << std::endl;
53 log_info << "Hardware to hardware blits with colorkey are " << (info->blit_hw_CC ? "" : "not ") << "accelerated." << std::endl;
54 log_info << "Hardware to hardware blits with alpha are " << (info->blit_hw_A ? "" : "not ") << "accelerated." << std::endl;
55 log_info << "Software to hardware blits are " << (info->blit_sw ? "" : "not ") << "accelerated." << std::endl;
56 log_info << "Software to hardware blits with colorkey are " << (info->blit_sw_CC ? "" : "not ") << "accelerated." << std::endl;
57 log_info << "Software to hardware blits with alpha are " << (info->blit_sw_A ? "" : "not ") << "accelerated." << std::endl;
58 log_info << "Color fills are " << (info->blit_fill ? "" : "not ") << "accelerated." << std::endl;
60 int flags = SDL_SWSURFACE | SDL_ANYFORMAT;
61 if(config->use_fullscreen)
62 flags |= SDL_FULLSCREEN;
63 int width = config->screenwidth;
64 int height = config->screenheight;
66 screen = SDL_SetVideoMode(width, height, 0, flags);
68 std::stringstream msg;
69 msg << "Couldn't set video mode (" << width << "x" << height
70 << "): " << SDL_GetError();
71 throw std::runtime_error(msg.str());
74 float xfactor = (float) config->screenwidth / SCREEN_WIDTH;
75 float yfactor = (float) config->screenheight / SCREEN_HEIGHT;
78 numerator = config->screenwidth;
79 denominator = SCREEN_WIDTH;
83 numerator = config->screenheight;
84 denominator = SCREEN_HEIGHT;
87 if(texture_manager == 0)
88 texture_manager = new TextureManager();
96 Renderer::draw_surface(const DrawingRequest& request)
98 //FIXME: support parameters request.alpha, request.angle, request.blend
99 const Surface* surface = (const Surface*) request.request_data;
100 SDL::Texture *sdltexture = dynamic_cast<SDL::Texture *>(surface->get_texture());
101 SDL::SurfaceData *surface_data = reinterpret_cast<SDL::SurfaceData *>(surface->get_surface_data());
103 DrawingEffect effect = request.drawing_effect;
104 if (surface->get_flipx()) effect = HORIZONTAL_FLIP;
106 SDL_Surface *transform = sdltexture->get_transform(request.color, effect);
108 // get and check SDL_Surface
109 if (transform == 0) {
110 std::cerr << "Warning: Tried to draw NULL surface, skipped draw" << std::endl;
114 SDL_Rect *src_rect = surface_data->get_src_rect(effect);
116 dst_rect.x = (int) request.pos.x * numerator / denominator;
117 dst_rect.y = (int) request.pos.y * numerator / denominator;
119 SDL_BlitSurface(transform, src_rect, screen, &dst_rect);
123 Renderer::draw_surface_part(const DrawingRequest& request)
125 const SurfacePartRequest* surfacepartrequest
126 = (SurfacePartRequest*) request.request_data;
128 const Surface* surface = surfacepartrequest->surface;
129 SDL::Texture *sdltexture = dynamic_cast<SDL::Texture *>(surface->get_texture());
131 DrawingEffect effect = request.drawing_effect;
132 if (surface->get_flipx()) effect = HORIZONTAL_FLIP;
134 SDL_Surface *transform = sdltexture->get_transform(Color(1.0, 1.0, 1.0), effect);
136 // get and check SDL_Surface
137 if (transform == 0) {
138 std::cerr << "Warning: Tried to draw NULL surface, skipped draw" << std::endl;
143 if (effect == HORIZONTAL_FLIP)
145 ox = sdltexture->get_texture_width() - surface->get_x() - (int) surfacepartrequest->size.x;
149 ox = surface->get_x();
151 if (effect == VERTICAL_FLIP)
153 oy = sdltexture->get_texture_height() - surface->get_y() - (int) surfacepartrequest->size.y;
157 oy = surface->get_y();
161 src_rect.x = (ox + (int) surfacepartrequest->source.x) * numerator / denominator;
162 src_rect.y = (oy + (int) surfacepartrequest->source.y) * numerator / denominator;
163 src_rect.w = (int) surfacepartrequest->size.x * numerator / denominator;
164 src_rect.h = (int) surfacepartrequest->size.y * numerator / denominator;
167 dst_rect.x = (int) request.pos.x * numerator / denominator;
168 dst_rect.y = (int) request.pos.y * numerator / denominator;
170 SDL_BlitSurface(transform, &src_rect, screen, &dst_rect);
174 Renderer::draw_gradient(const DrawingRequest& request)
176 const GradientRequest* gradientrequest
177 = (GradientRequest*) request.request_data;
178 const Color& top = gradientrequest->top;
179 const Color& bottom = gradientrequest->bottom;
181 for(int y = 0;y < screen->h;++y)
183 Uint8 r = (Uint8)((((float)(top.red-bottom.red)/(0-screen->h)) * y + top.red) * 255);
184 Uint8 g = (Uint8)((((float)(top.green-bottom.green)/(0-screen->h)) * y + top.green) * 255);
185 Uint8 b = (Uint8)((((float)(top.blue-bottom.blue)/(0-screen->h)) * y + top.blue) * 255);
186 Uint8 a = (Uint8)((((float)(top.alpha-bottom.alpha)/(0-screen->h)) * y + top.alpha) * 255);
187 Uint32 color = SDL_MapRGB(screen->format, r, g, b);
195 if(a == SDL_ALPHA_OPAQUE) {
196 SDL_FillRect(screen, &rect, color);
197 } else if(a != SDL_ALPHA_TRANSPARENT) {
198 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);
200 SDL_FillRect(temp, 0, color);
201 SDL_SetAlpha(temp, SDL_SRCALPHA, a);
202 SDL_BlitSurface(temp, 0, screen, &rect);
203 SDL_FreeSurface(temp);
209 Renderer::draw_text(const DrawingRequest& request)
211 const TextRequest* textrequest = (TextRequest*) request.request_data;
213 textrequest->font->draw(this, textrequest->text, request.pos,
214 textrequest->alignment, request.drawing_effect, request.alpha);
218 Renderer::draw_filled_rect(const DrawingRequest& request)
220 const FillRectRequest* fillrectrequest
221 = (FillRectRequest*) request.request_data;
224 rect.x = (Sint16)request.pos.x * screen->w / SCREEN_WIDTH;
225 rect.y = (Sint16)request.pos.y * screen->h / SCREEN_HEIGHT;
226 rect.w = (Uint16)fillrectrequest->size.x * screen->w / SCREEN_WIDTH;
227 rect.h = (Uint16)fillrectrequest->size.y * screen->h / SCREEN_HEIGHT;
228 Uint8 r = static_cast<Uint8>(fillrectrequest->color.red * 255);
229 Uint8 g = static_cast<Uint8>(fillrectrequest->color.green * 255);
230 Uint8 b = static_cast<Uint8>(fillrectrequest->color.blue * 255);
231 Uint8 a = static_cast<Uint8>(fillrectrequest->color.alpha * 255);
232 Uint32 color = SDL_MapRGB(screen->format, r, g, b);
233 if(a == SDL_ALPHA_OPAQUE) {
234 SDL_FillRect(screen, &rect, color);
235 } else if(a != SDL_ALPHA_TRANSPARENT) {
236 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);
238 SDL_FillRect(temp, 0, color);
239 SDL_SetAlpha(temp, SDL_SRCALPHA, a);
240 SDL_BlitSurface(temp, 0, screen, &rect);
241 SDL_FreeSurface(temp);
246 Renderer::do_take_screenshot()
248 // [Christoph] TODO: Yes, this method also takes care of the actual disk I/O. Split it?
250 SDL_Surface *screen = SDL_GetVideoSurface();
253 static const std::string writeDir = PHYSFS_getWriteDir();
254 static const std::string dirSep = PHYSFS_getDirSeparator();
255 static const std::string baseName = "screenshot";
256 static const std::string fileExt = ".bmp";
257 std::string fullFilename;
258 for (int num = 0; num < 1000; num++) {
259 std::ostringstream oss;
261 oss << std::setw(3) << std::setfill('0') << num;
263 std::string fileName = oss.str();
264 fullFilename = writeDir + dirSep + fileName;
265 if (!PHYSFS_exists(fileName.c_str())) {
266 SDL_SaveBMP(screen, fullFilename.c_str());
267 log_debug << "Wrote screenshot to \"" << fullFilename << "\"" << std::endl;
271 log_warning << "Did not save screenshot, because all files up to \"" << fullFilename << "\" already existed" << std::endl;