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.
25 #include <SDL_image.h>
30 #include "drawing_context.hpp"
31 #include "drawing_request.hpp"
32 #include "video_systems.hpp"
33 #include "renderer.hpp"
34 #include "lightmap.hpp"
35 #include "surface.hpp"
37 #include "gameconfig.hpp"
38 #include "texture.hpp"
39 #include "texture_manager.hpp"
40 #include "obstack/obstackpp.hpp"
42 static inline int next_po2(int val)
51 DrawingContext::DrawingContext() :
52 renderer(0), lightmap(0), ambient_color(1.0f, 1.0f, 1.0f, 1.0f), target(NORMAL), screenshot_requested(false)
54 requests = &drawing_requests;
58 DrawingContext::~DrawingContext()
63 obstack_free(&obst, NULL);
67 DrawingContext::init_renderer()
72 renderer = new_renderer();
73 lightmap = new_lightmap();
77 DrawingContext::draw_surface(const Surface* surface, const Vector& position,
78 float angle, const Color& color, const Blend& blend,
83 DrawingRequest* request = new(obst) DrawingRequest();
85 request->target = target;
86 request->type = SURFACE;
87 request->pos = transform.apply(position);
89 if(request->pos.x >= SCREEN_WIDTH || request->pos.y >= SCREEN_HEIGHT
90 || request->pos.x + surface->get_width() < 0
91 || request->pos.y + surface->get_height() < 0)
94 request->layer = layer;
95 request->drawing_effect = transform.drawing_effect;
96 request->alpha = transform.alpha;
97 request->angle = angle;
98 request->color = color;
99 request->blend = blend;
101 request->request_data = const_cast<Surface*> (surface);
103 requests->push_back(request);
107 DrawingContext::draw_surface(const Surface* surface, const Vector& position,
110 draw_surface(surface, position, 0.0f, Color(1.0f, 1.0f, 1.0f), Blend(), layer);
114 DrawingContext::draw_surface_part(const Surface* surface, const Vector& source,
115 const Vector& size, const Vector& dest, int layer)
117 assert(surface != 0);
119 DrawingRequest* request = new(obst) DrawingRequest();
121 request->target = target;
122 request->type = SURFACE_PART;
123 request->pos = transform.apply(dest);
124 request->layer = layer;
125 request->drawing_effect = transform.drawing_effect;
126 request->alpha = transform.alpha;
128 SurfacePartRequest* surfacepartrequest = new(obst) SurfacePartRequest();
129 surfacepartrequest->size = size;
130 surfacepartrequest->source = source;
131 surfacepartrequest->surface = surface;
133 // clip on screen borders
134 if(request->pos.x < 0) {
135 surfacepartrequest->size.x += request->pos.x;
136 if(surfacepartrequest->size.x <= 0)
138 surfacepartrequest->source.x -= request->pos.x;
141 if(request->pos.y < 0) {
142 surfacepartrequest->size.y += request->pos.y;
143 if(surfacepartrequest->size.y <= 0)
145 surfacepartrequest->source.y -= request->pos.y;
148 request->request_data = surfacepartrequest;
150 requests->push_back(request);
154 DrawingContext::draw_text(const Font* font, const std::string& text,
155 const Vector& position, FontAlignment alignment, int layer)
157 DrawingRequest* request = new(obst) DrawingRequest();
159 request->target = target;
160 request->type = TEXT;
161 request->pos = transform.apply(position);
162 request->layer = layer;
163 request->drawing_effect = transform.drawing_effect;
164 request->alpha = transform.alpha;
166 TextRequest* textrequest = new(obst) TextRequest();
167 textrequest->font = font;
168 textrequest->text = text;
169 textrequest->alignment = alignment;
170 request->request_data = textrequest;
172 requests->push_back(request);
176 DrawingContext::draw_center_text(const Font* font, const std::string& text,
177 const Vector& position, int layer)
179 draw_text(font, text, Vector(position.x + SCREEN_WIDTH/2, position.y),
180 ALIGN_CENTER, layer);
184 DrawingContext::draw_gradient(const Color& top, const Color& bottom, int layer)
186 DrawingRequest* request = new(obst) DrawingRequest();
188 request->target = target;
189 request->type = GRADIENT;
190 request->pos = Vector(0,0);
191 request->layer = layer;
193 request->drawing_effect = transform.drawing_effect;
194 request->alpha = transform.alpha;
196 GradientRequest* gradientrequest = new(obst) GradientRequest();
197 gradientrequest->top = top;
198 gradientrequest->bottom = bottom;
199 request->request_data = gradientrequest;
201 requests->push_back(request);
205 DrawingContext::draw_filled_rect(const Vector& topleft, const Vector& size,
206 const Color& color, int layer)
208 DrawingRequest* request = new(obst) DrawingRequest();
210 request->target = target;
211 request->type = FILLRECT;
212 request->pos = transform.apply(topleft);
213 request->layer = layer;
215 request->drawing_effect = transform.drawing_effect;
216 request->alpha = transform.alpha;
218 FillRectRequest* fillrectrequest = new(obst) FillRectRequest();
219 fillrectrequest->size = size;
220 fillrectrequest->color = color;
221 fillrectrequest->color.alpha = color.alpha * transform.alpha;
222 fillrectrequest->radius = 0.0f;
223 request->request_data = fillrectrequest;
225 requests->push_back(request);
229 DrawingContext::draw_filled_rect(const Rect& rect, const Color& color,
232 draw_filled_rect(rect, color, 0.0f, layer);
236 DrawingContext::draw_filled_rect(const Rect& rect, const Color& color, float radius, int layer)
238 DrawingRequest* request = new(obst) DrawingRequest();
240 request->target = target;
241 request->type = FILLRECT;
242 request->pos = transform.apply(rect.p1);
243 request->layer = layer;
245 request->drawing_effect = transform.drawing_effect;
246 request->alpha = transform.alpha;
248 FillRectRequest* fillrectrequest = new(obst) FillRectRequest;
249 fillrectrequest->size = Vector(rect.get_width(), rect.get_height());
250 fillrectrequest->color = color;
251 fillrectrequest->color.alpha = color.alpha * transform.alpha;
252 fillrectrequest->radius = radius;
253 request->request_data = fillrectrequest;
255 requests->push_back(request);
259 DrawingContext::draw_inverse_ellipse(const Vector& pos, const Vector& size, const Color& color, int layer)
261 DrawingRequest* request = new(obst) DrawingRequest();
263 request->target = target;
264 request->type = INVERSEELLIPSE;
265 request->pos = transform.apply(pos);
266 request->layer = layer;
268 request->drawing_effect = transform.drawing_effect;
269 request->alpha = transform.alpha;
271 InverseEllipseRequest* ellipse = new(obst)InverseEllipseRequest;
273 ellipse->color = color;
274 ellipse->color.alpha = color.alpha * transform.alpha;
275 ellipse->size = size;
276 request->request_data = ellipse;
278 requests->push_back(request);
282 DrawingContext::get_light(const Vector& position, Color* color)
284 if( ambient_color.red == 1.0f && ambient_color.green == 1.0f
285 && ambient_color.blue == 1.0f ) {
286 *color = Color( 1.0f, 1.0f, 1.0f);
290 DrawingRequest* request = new(obst) DrawingRequest();
291 request->target = target;
292 request->type = GETLIGHT;
293 request->pos = transform.apply(position);
295 //There is no light offscreen.
296 if(request->pos.x >= SCREEN_WIDTH || request->pos.y >= SCREEN_HEIGHT
297 || request->pos.x < 0 || request->pos.y < 0){
298 *color = Color( 0, 0, 0);
302 request->layer = LAYER_GUI; //make sure all get_light requests are handled last.
303 GetLightRequest* getlightrequest = new(obst) GetLightRequest();
304 getlightrequest->color_ptr = color;
305 request->request_data = getlightrequest;
306 lightmap_requests.push_back(request);
310 DrawingContext::do_drawing()
313 assert(transformstack.empty());
314 assert(target_stack.empty());
316 transformstack.clear();
317 target_stack.clear();
319 //Use Lightmap if ambient color is not white.
320 bool use_lightmap = ( ambient_color.red != 1.0f || ambient_color.green != 1.0f ||
321 ambient_color.blue != 1.0f );
323 // PART1: create lightmap
325 lightmap->start_draw(ambient_color);
326 handle_drawing_requests(lightmap_requests);
327 lightmap->end_draw();
329 DrawingRequest* request = new(obst) DrawingRequest();
330 request->target = NORMAL;
331 request->type = DRAW_LIGHTMAP;
332 request->layer = LAYER_HUD - 1;
333 drawing_requests.push_back(request);
335 lightmap_requests.clear();
337 handle_drawing_requests(drawing_requests);
338 drawing_requests.clear();
339 obstack_free(&obst, NULL);
342 // if a screenshot was requested, take one
343 if (screenshot_requested) {
344 renderer->do_take_screenshot();
345 screenshot_requested = false;
351 class RequestPtrCompare
352 : public std::binary_function<const DrawingRequest*,
353 const DrawingRequest*,
357 bool operator()(const DrawingRequest* r1, const DrawingRequest* r2) const
364 DrawingContext::handle_drawing_requests(DrawingRequests& requests)
366 std::stable_sort(requests.begin(), requests.end(), RequestPtrCompare());
368 DrawingRequests::const_iterator i;
369 for(i = requests.begin(); i != requests.end(); ++i) {
370 const DrawingRequest& request = **i;
372 switch(request.target) {
374 switch(request.type) {
376 renderer->draw_surface(request);
379 renderer->draw_surface_part(request);
382 renderer->draw_gradient(request);
386 const TextRequest* textrequest = (TextRequest*) request.request_data;
387 textrequest->font->draw(renderer, textrequest->text, request.pos,
388 textrequest->alignment, request.drawing_effect, request.alpha);
392 renderer->draw_filled_rect(request);
395 renderer->draw_inverse_ellipse(request);
401 lightmap->get_light(request);
406 switch(request.type) {
408 lightmap->draw_surface(request);
411 lightmap->draw_surface_part(request);
414 lightmap->draw_gradient(request);
418 const TextRequest* textrequest = (TextRequest*) request.request_data;
419 textrequest->font->draw(renderer, textrequest->text, request.pos,
420 textrequest->alignment, request.drawing_effect, request.alpha);
424 lightmap->draw_filled_rect(request);
427 assert(!"InverseEllipse doesn't make sense on the lightmap");
433 lightmap->get_light(request);
442 DrawingContext::push_transform()
444 transformstack.push_back(transform);
448 DrawingContext::pop_transform()
450 assert(!transformstack.empty());
452 transform = transformstack.back();
453 transformstack.pop_back();
457 DrawingContext::set_drawing_effect(DrawingEffect effect)
459 transform.drawing_effect = effect;
463 DrawingContext::get_drawing_effect() const
465 return transform.drawing_effect;
469 DrawingContext::set_alpha(float alpha)
471 transform.alpha = alpha;
475 DrawingContext::get_alpha() const
477 return transform.alpha;
481 DrawingContext::push_target()
483 target_stack.push_back(target);
487 DrawingContext::pop_target()
489 set_target(target_stack.back());
490 target_stack.pop_back();
494 DrawingContext::set_target(Target target)
496 this->target = target;
497 if(target == LIGHTMAP) {
498 requests = &lightmap_requests;
500 assert(target == NORMAL);
501 requests = &drawing_requests;
506 DrawingContext::set_ambient_color( Color new_color )
508 ambient_color = new_color;
512 DrawingContext::take_screenshot()
514 screenshot_requested = true;