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, Color color)
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;
165 request->color = color;
167 TextRequest* textrequest = new(obst) TextRequest();
168 textrequest->font = font;
169 textrequest->text = text;
170 textrequest->alignment = alignment;
171 request->request_data = textrequest;
173 requests->push_back(request);
177 DrawingContext::draw_center_text(const Font* font, const std::string& text,
178 const Vector& position, int layer, Color color)
180 draw_text(font, text, Vector(position.x + SCREEN_WIDTH/2, position.y),
181 ALIGN_CENTER, layer, color);
185 DrawingContext::draw_gradient(const Color& top, const Color& bottom, int layer)
187 DrawingRequest* request = new(obst) DrawingRequest();
189 request->target = target;
190 request->type = GRADIENT;
191 request->pos = Vector(0,0);
192 request->layer = layer;
194 request->drawing_effect = transform.drawing_effect;
195 request->alpha = transform.alpha;
197 GradientRequest* gradientrequest = new(obst) GradientRequest();
198 gradientrequest->top = top;
199 gradientrequest->bottom = bottom;
200 request->request_data = gradientrequest;
202 requests->push_back(request);
206 DrawingContext::draw_filled_rect(const Vector& topleft, const Vector& size,
207 const Color& color, int layer)
209 DrawingRequest* request = new(obst) DrawingRequest();
211 request->target = target;
212 request->type = FILLRECT;
213 request->pos = transform.apply(topleft);
214 request->layer = layer;
216 request->drawing_effect = transform.drawing_effect;
217 request->alpha = transform.alpha;
219 FillRectRequest* fillrectrequest = new(obst) FillRectRequest();
220 fillrectrequest->size = size;
221 fillrectrequest->color = color;
222 fillrectrequest->color.alpha = color.alpha * transform.alpha;
223 fillrectrequest->radius = 0.0f;
224 request->request_data = fillrectrequest;
226 requests->push_back(request);
230 DrawingContext::draw_filled_rect(const Rect& rect, const Color& color,
233 draw_filled_rect(rect, color, 0.0f, layer);
237 DrawingContext::draw_filled_rect(const Rect& rect, const Color& color, float radius, int layer)
239 DrawingRequest* request = new(obst) DrawingRequest();
241 request->target = target;
242 request->type = FILLRECT;
243 request->pos = transform.apply(rect.p1);
244 request->layer = layer;
246 request->drawing_effect = transform.drawing_effect;
247 request->alpha = transform.alpha;
249 FillRectRequest* fillrectrequest = new(obst) FillRectRequest;
250 fillrectrequest->size = Vector(rect.get_width(), rect.get_height());
251 fillrectrequest->color = color;
252 fillrectrequest->color.alpha = color.alpha * transform.alpha;
253 fillrectrequest->radius = radius;
254 request->request_data = fillrectrequest;
256 requests->push_back(request);
260 DrawingContext::draw_inverse_ellipse(const Vector& pos, const Vector& size, const Color& color, int layer)
262 DrawingRequest* request = new(obst) DrawingRequest();
264 request->target = target;
265 request->type = INVERSEELLIPSE;
266 request->pos = transform.apply(pos);
267 request->layer = layer;
269 request->drawing_effect = transform.drawing_effect;
270 request->alpha = transform.alpha;
272 InverseEllipseRequest* ellipse = new(obst)InverseEllipseRequest;
274 ellipse->color = color;
275 ellipse->color.alpha = color.alpha * transform.alpha;
276 ellipse->size = size;
277 request->request_data = ellipse;
279 requests->push_back(request);
283 DrawingContext::get_light(const Vector& position, Color* color)
285 if( ambient_color.red == 1.0f && ambient_color.green == 1.0f
286 && ambient_color.blue == 1.0f ) {
287 *color = Color( 1.0f, 1.0f, 1.0f);
291 DrawingRequest* request = new(obst) DrawingRequest();
292 request->target = target;
293 request->type = GETLIGHT;
294 request->pos = transform.apply(position);
296 //There is no light offscreen.
297 if(request->pos.x >= SCREEN_WIDTH || request->pos.y >= SCREEN_HEIGHT
298 || request->pos.x < 0 || request->pos.y < 0){
299 *color = Color( 0, 0, 0);
303 request->layer = LAYER_GUI; //make sure all get_light requests are handled last.
304 GetLightRequest* getlightrequest = new(obst) GetLightRequest();
305 getlightrequest->color_ptr = color;
306 request->request_data = getlightrequest;
307 lightmap_requests.push_back(request);
311 DrawingContext::do_drawing()
314 assert(transformstack.empty());
315 assert(target_stack.empty());
317 transformstack.clear();
318 target_stack.clear();
320 //Use Lightmap if ambient color is not white.
321 bool use_lightmap = ( ambient_color.red != 1.0f || ambient_color.green != 1.0f ||
322 ambient_color.blue != 1.0f );
324 // PART1: create lightmap
326 lightmap->start_draw(ambient_color);
327 handle_drawing_requests(lightmap_requests);
328 lightmap->end_draw();
330 DrawingRequest* request = new(obst) DrawingRequest();
331 request->target = NORMAL;
332 request->type = DRAW_LIGHTMAP;
333 request->layer = LAYER_HUD - 1;
334 drawing_requests.push_back(request);
336 lightmap_requests.clear();
338 handle_drawing_requests(drawing_requests);
339 drawing_requests.clear();
340 obstack_free(&obst, NULL);
343 // if a screenshot was requested, take one
344 if (screenshot_requested) {
345 renderer->do_take_screenshot();
346 screenshot_requested = false;
352 class RequestPtrCompare
353 : public std::binary_function<const DrawingRequest*,
354 const DrawingRequest*,
358 bool operator()(const DrawingRequest* r1, const DrawingRequest* r2) const
365 DrawingContext::handle_drawing_requests(DrawingRequests& requests)
367 std::stable_sort(requests.begin(), requests.end(), RequestPtrCompare());
369 DrawingRequests::const_iterator i;
370 for(i = requests.begin(); i != requests.end(); ++i) {
371 const DrawingRequest& request = **i;
373 switch(request.target) {
375 switch(request.type) {
377 renderer->draw_surface(request);
380 renderer->draw_surface_part(request);
383 renderer->draw_gradient(request);
387 const TextRequest* textrequest = (TextRequest*) request.request_data;
388 textrequest->font->draw(renderer, textrequest->text, request.pos,
389 textrequest->alignment, request.drawing_effect, request.color, request.alpha);
393 renderer->draw_filled_rect(request);
396 renderer->draw_inverse_ellipse(request);
402 lightmap->get_light(request);
407 switch(request.type) {
409 lightmap->draw_surface(request);
412 lightmap->draw_surface_part(request);
415 lightmap->draw_gradient(request);
419 const TextRequest* textrequest = (TextRequest*) request.request_data;
420 textrequest->font->draw(renderer, textrequest->text, request.pos,
421 textrequest->alignment, request.drawing_effect, request.color, request.alpha);
425 lightmap->draw_filled_rect(request);
428 assert(!"InverseEllipse doesn't make sense on the lightmap");
434 lightmap->get_light(request);
443 DrawingContext::push_transform()
445 transformstack.push_back(transform);
449 DrawingContext::pop_transform()
451 assert(!transformstack.empty());
453 transform = transformstack.back();
454 transformstack.pop_back();
458 DrawingContext::set_drawing_effect(DrawingEffect effect)
460 transform.drawing_effect = effect;
464 DrawingContext::get_drawing_effect() const
466 return transform.drawing_effect;
470 DrawingContext::set_alpha(float alpha)
472 transform.alpha = alpha;
476 DrawingContext::get_alpha() const
478 return transform.alpha;
482 DrawingContext::push_target()
484 target_stack.push_back(target);
488 DrawingContext::pop_target()
490 set_target(target_stack.back());
491 target_stack.pop_back();
495 DrawingContext::set_target(Target target)
497 this->target = target;
498 if(target == LIGHTMAP) {
499 requests = &lightmap_requests;
501 assert(target == NORMAL);
502 requests = &drawing_requests;
507 DrawingContext::set_ambient_color( Color new_color )
509 ambient_color = new_color;
513 DrawingContext::take_screenshot()
515 screenshot_requested = true;