-// $Id: drawing_context.cpp 2334 2005-04-04 16:26:14Z grumbel $
+// $Id$
//
-// SuperTux - A Jump'n Run
-// Copyright (C) 2004 Matthias Braun <matze@braunis.de
+// SuperTux
+// Copyright (C) 2006 Matthias Braun <matze@braunis.de>
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#include <config.h>
+#include <functional>
#include <algorithm>
#include <cassert>
#include <iostream>
+#include <SDL_image.h>
+#include <GL/gl.h>
+#include <sstream>
+#include <iomanip>
+#include <physfs.h>
#include "drawing_context.hpp"
#include "surface.hpp"
#include "font.hpp"
#include "main.hpp"
#include "gameconfig.hpp"
+#include "glutil.hpp"
+#include "texture.hpp"
+#include "texture_manager.hpp"
+#include "obstack/obstackpp.hpp"
+#define LIGHTMAP_DIV 5
-DrawingContext::DrawingContext(SDL_Surface* targetsurface)
+enum RequestType
{
- if(targetsurface) {
- screen = targetsurface;
- } else {
- screen = SDL_GetVideoSurface();
+ SURFACE, SURFACE_PART, TEXT, GRADIENT, FILLRECT, LIGHTMAPREQUEST, GETLIGHT
+};
+
+struct SurfacePartRequest
+{
+ const Surface* surface;
+ Vector source, size;
+};
+
+struct TextRequest
+{
+ const Font* font;
+ std::string text;
+ FontAlignment alignment;
+};
+
+struct GradientRequest
+{
+ Color top, bottom;
+ Vector size;
+};
+
+struct FillRectRequest
+{
+ Color color;
+ Vector size;
+};
+
+struct DrawingRequest
+{
+ RequestType type;
+ Vector pos;
+
+ int layer;
+ DrawingEffect drawing_effect;
+ float alpha;
+ Blend blend;
+ float angle;
+ Color color;
+
+ void* request_data;
+
+ DrawingRequest()
+ : angle(0.0f),
+ color(1.0f, 1.0f, 1.0f, 1.0f)
+ {}
+
+ bool operator<(const DrawingRequest& other) const
+ {
+ return layer < other.layer;
}
+};
+
+struct GetLightRequest
+{
+ Color* color_ptr;
+};
+
+static inline int next_po2(int val)
+{
+ int result = 1;
+ while(result < val)
+ result *= 2;
+
+ return result;
+}
+
+DrawingContext::DrawingContext()
+ : ambient_color(1.0f, 1.0f, 1.0f, 1.0f), target(NORMAL), screenshot_requested(false)
+{
+ screen = SDL_GetVideoSurface();
+
+ lightmap_width = screen->w / LIGHTMAP_DIV;
+ lightmap_height = screen->h / LIGHTMAP_DIV;
+ unsigned int width = next_po2(lightmap_width);
+ unsigned int height = next_po2(lightmap_height);
+
+ lightmap = new Texture(width, height, GL_RGB);
+
+ lightmap_uv_right = static_cast<float>(lightmap_width) / static_cast<float>(width);
+ lightmap_uv_bottom = static_cast<float>(lightmap_height) / static_cast<float>(height);
+ texture_manager->register_texture(lightmap);
+
+ requests = &drawing_requests;
+
+ obstack_init(&obst);
}
DrawingContext::~DrawingContext()
{
+ obstack_free(&obst, NULL);
+
+ texture_manager->remove_texture(lightmap);
+ delete lightmap;
}
void
DrawingContext::draw_surface(const Surface* surface, const Vector& position,
- int layer)
+ float angle, const Color& color, const Blend& blend,
+ int layer)
{
assert(surface != 0);
-
- DrawingRequest request;
- request.type = SURFACE;
- request.pos = transform.apply(position);
+ DrawingRequest* request = new(obst) DrawingRequest();
+
+ request->type = SURFACE;
+ request->pos = transform.apply(position);
- if(request.pos.x >= SCREEN_WIDTH || request.pos.y >= SCREEN_HEIGHT
- || request.pos.x + surface->w < 0 || request.pos.y + surface->h < 0)
+ if(request->pos.x >= SCREEN_WIDTH || request->pos.y >= SCREEN_HEIGHT
+ || request->pos.x + surface->get_width() < 0
+ || request->pos.y + surface->get_height() < 0)
return;
- request.layer = layer;
- request.drawing_effect = transform.drawing_effect;
- request.zoom = transform.zoom;
- request.alpha = transform.alpha;
- request.request_data = const_cast<Surface*> (surface);
+ request->layer = layer;
+ request->drawing_effect = transform.drawing_effect;
+ request->alpha = transform.alpha;
+ request->angle = angle;
+ request->color = color;
+ request->blend = blend;
- drawingrequests.push_back(request);
+ request->request_data = const_cast<Surface*> (surface);
+
+ requests->push_back(request);
+}
+
+void
+DrawingContext::draw_surface(const Surface* surface, const Vector& position,
+ int layer)
+{
+ draw_surface(surface, position, 0.0f, Color(1.0f, 1.0f, 1.0f), Blend(), layer);
}
void
{
assert(surface != 0);
- DrawingRequest request;
+ DrawingRequest* request = new(obst) DrawingRequest();
+
+ request->type = SURFACE_PART;
+ request->pos = transform.apply(dest);
+ request->layer = layer;
+ request->drawing_effect = transform.drawing_effect;
+ request->alpha = transform.alpha;
- request.type = SURFACE_PART;
- request.pos = transform.apply(dest);
- request.layer = layer;
- request.drawing_effect = transform.drawing_effect;
- request.alpha = transform.alpha;
-
- SurfacePartRequest* surfacepartrequest = new SurfacePartRequest();
+ SurfacePartRequest* surfacepartrequest = new(obst) SurfacePartRequest();
surfacepartrequest->size = size;
surfacepartrequest->source = source;
surfacepartrequest->surface = surface;
// clip on screen borders
- if(request.pos.x < 0) {
- surfacepartrequest->size.x += request.pos.x;
+ if(request->pos.x < 0) {
+ surfacepartrequest->size.x += request->pos.x;
if(surfacepartrequest->size.x <= 0)
return;
- surfacepartrequest->source.x -= request.pos.x;
- request.pos.x = 0;
+ surfacepartrequest->source.x -= request->pos.x;
+ request->pos.x = 0;
}
- if(request.pos.y < 0) {
- surfacepartrequest->size.y += request.pos.y;
+ if(request->pos.y < 0) {
+ surfacepartrequest->size.y += request->pos.y;
if(surfacepartrequest->size.y <= 0)
return;
- surfacepartrequest->source.y -= request.pos.y;
- request.pos.y = 0;
+ surfacepartrequest->source.y -= request->pos.y;
+ request->pos.y = 0;
}
- request.request_data = surfacepartrequest;
+ request->request_data = surfacepartrequest;
- drawingrequests.push_back(request);
+ requests->push_back(request);
}
void
DrawingContext::draw_text(const Font* font, const std::string& text,
const Vector& position, FontAlignment alignment, int layer)
{
- DrawingRequest request;
+ DrawingRequest* request = new(obst) DrawingRequest();
- request.type = TEXT;
- request.pos = transform.apply(position);
- request.layer = layer;
- request.drawing_effect = transform.drawing_effect;
- request.zoom = transform.zoom;
- request.alpha = transform.alpha;
+ request->type = TEXT;
+ request->pos = transform.apply(position);
+ request->layer = layer;
+ request->drawing_effect = transform.drawing_effect;
+ request->alpha = transform.alpha;
- TextRequest* textrequest = new TextRequest;
+ TextRequest* textrequest = new(obst) TextRequest();
textrequest->font = font;
textrequest->text = text;
textrequest->alignment = alignment;
- request.request_data = textrequest;
+ request->request_data = textrequest;
- drawingrequests.push_back(request);
+ requests->push_back(request);
}
void
const Vector& position, int layer)
{
draw_text(font, text, Vector(position.x + SCREEN_WIDTH/2, position.y),
- CENTER_ALLIGN, layer);
+ ALIGN_CENTER, layer);
}
void
-DrawingContext::draw_gradient(Color top, Color bottom, int layer)
+DrawingContext::draw_gradient(const Color& top, const Color& bottom, int layer)
{
- DrawingRequest request;
+ DrawingRequest* request = new(obst) DrawingRequest();
- request.type = GRADIENT;
- request.pos = Vector(0,0);
- request.layer = layer;
+ request->type = GRADIENT;
+ request->pos = Vector(0,0);
+ request->layer = layer;
- request.drawing_effect = transform.drawing_effect;
- request.zoom = transform.zoom;
- request.alpha = transform.alpha;
+ request->drawing_effect = transform.drawing_effect;
+ request->alpha = transform.alpha;
- GradientRequest* gradientrequest = new GradientRequest;
+ GradientRequest* gradientrequest = new(obst) GradientRequest();
gradientrequest->top = top;
gradientrequest->bottom = bottom;
- request.request_data = gradientrequest;
+ request->request_data = gradientrequest;
- drawingrequests.push_back(request);
+ requests->push_back(request);
}
void
DrawingContext::draw_filled_rect(const Vector& topleft, const Vector& size,
- Color color, int layer)
+ const Color& color, int layer)
{
- DrawingRequest request;
+ DrawingRequest* request = new(obst) DrawingRequest();
- request.type = FILLRECT;
- request.pos = transform.apply(topleft);
- request.layer = layer;
+ request->type = FILLRECT;
+ request->pos = transform.apply(topleft);
+ request->layer = layer;
- request.drawing_effect = transform.drawing_effect;
- request.zoom = transform.zoom;
- request.alpha = transform.alpha;
+ request->drawing_effect = transform.drawing_effect;
+ request->alpha = transform.alpha;
- FillRectRequest* fillrectrequest = new FillRectRequest;
+ FillRectRequest* fillrectrequest = new(obst) FillRectRequest();
fillrectrequest->size = size;
fillrectrequest->color = color;
- fillrectrequest->color.alpha
- = (int) ((float) fillrectrequest->color.alpha
- * ((float) transform.alpha / 255.0));
- request.request_data = fillrectrequest;
+ fillrectrequest->color.alpha = color.alpha * transform.alpha;
+ request->request_data = fillrectrequest;
- drawingrequests.push_back(request);
+ requests->push_back(request);
}
void
-DrawingContext::draw_surface_part(DrawingRequest& request)
+DrawingContext::draw_filled_rect(const Rect& rect, const Color& color,
+ int layer)
{
- SurfacePartRequest* surfacepartrequest
+ DrawingRequest* request = new(obst) DrawingRequest();
+
+ request->type = FILLRECT;
+ request->pos = transform.apply(rect.p1);
+ request->layer = layer;
+
+ request->drawing_effect = transform.drawing_effect;
+ request->alpha = transform.alpha;
+
+ FillRectRequest* fillrectrequest = new(obst) FillRectRequest;
+ fillrectrequest->size = Vector(rect.get_width(), rect.get_height());
+ fillrectrequest->color = color;
+ fillrectrequest->color.alpha = color.alpha * transform.alpha;
+ request->request_data = fillrectrequest;
+
+ requests->push_back(request);
+}
+
+void
+DrawingContext::get_light(const Vector& position, Color* color)
+{
+ if( ambient_color.red == 1.0f && ambient_color.green == 1.0f
+ && ambient_color.blue == 1.0f ) {
+ *color = Color( 1.0f, 1.0f, 1.0f);
+ return;
+ }
+
+ DrawingRequest* request = new(obst) DrawingRequest();
+ request->type = GETLIGHT;
+ request->pos = transform.apply(position);
+
+ //There is no light offscreen.
+ if(request->pos.x >= SCREEN_WIDTH || request->pos.y >= SCREEN_HEIGHT
+ || request->pos.x < 0 || request->pos.y < 0){
+ *color = Color( 0, 0, 0);
+ return;
+ }
+
+ request->layer = LAYER_GUI; //make sure all get_light requests are handled last.
+ GetLightRequest* getlightrequest = new(obst) GetLightRequest();
+ getlightrequest->color_ptr = color;
+ request->request_data = getlightrequest;
+ lightmap_requests.push_back(request);
+}
+
+void
+DrawingContext::get_light(const DrawingRequest& request) const
+{
+ const GetLightRequest* getlightrequest
+ = (GetLightRequest*) request.request_data;
+
+ float pixels[3];
+ for( int i = 0; i<3; i++)
+ pixels[i] = 0.0f; //set to black
+
+ float posX = request.pos.x * lightmap_width / SCREEN_WIDTH;
+ float posY = screen->h - request.pos.y * lightmap_height / SCREEN_HEIGHT;
+ glReadPixels((GLint) posX, (GLint) posY , 1, 1, GL_RGB, GL_FLOAT, pixels);
+ *(getlightrequest->color_ptr) = Color( pixels[0], pixels[1], pixels[2]);
+ //printf("get_light %f/%f =>%f/%f r%f g%f b%f\n", request.pos.x, request.pos.y, posX, posY, pixels[0], pixels[1], pixels[2]);
+}
+
+void
+DrawingContext::draw_surface_part(const DrawingRequest& request) const
+{
+ const SurfacePartRequest* surfacepartrequest
= (SurfacePartRequest*) request.request_data;
- surfacepartrequest->surface->impl->draw_part(
+ surfacepartrequest->surface->draw_part(
surfacepartrequest->source.x, surfacepartrequest->source.y,
request.pos.x, request.pos.y,
- surfacepartrequest->size.x, surfacepartrequest->size.y, request.alpha,
- request.drawing_effect);
-
- delete surfacepartrequest;
+ surfacepartrequest->size.x, surfacepartrequest->size.y,
+ request.alpha, request.drawing_effect);
}
void
-DrawingContext::draw_gradient(DrawingRequest& request)
+DrawingContext::draw_gradient(const DrawingRequest& request) const
{
- GradientRequest* gradientrequest = (GradientRequest*) request.request_data;
+ const GradientRequest* gradientrequest
+ = (GradientRequest*) request.request_data;
const Color& top = gradientrequest->top;
const Color& bottom = gradientrequest->bottom;
-
+
+ glDisable(GL_TEXTURE_2D);
glBegin(GL_QUADS);
- glColor3ub(top.red, top.green, top.blue);
+ glColor4f(top.red, top.green, top.blue, top.alpha);
glVertex2f(0, 0);
glVertex2f(SCREEN_WIDTH, 0);
- glColor3ub(bottom.red, bottom.green, bottom.blue);
+ glColor4f(bottom.red, bottom.green, bottom.blue, bottom.alpha);
glVertex2f(SCREEN_WIDTH, SCREEN_HEIGHT);
glVertex2f(0, SCREEN_HEIGHT);
glEnd();
-
- delete gradientrequest;
+ glEnable(GL_TEXTURE_2D);
}
void
-DrawingContext::draw_text(DrawingRequest& request)
+DrawingContext::draw_text(const DrawingRequest& request) const
{
- TextRequest* textrequest = (TextRequest*) request.request_data;
+ const TextRequest* textrequest = (TextRequest*) request.request_data;
textrequest->font->draw(textrequest->text, request.pos,
textrequest->alignment, request.drawing_effect, request.alpha);
-
- delete textrequest;
}
void
-DrawingContext::draw_filled_rect(DrawingRequest& request)
+DrawingContext::draw_filled_rect(const DrawingRequest& request) const
{
- FillRectRequest* fillrectrequest = (FillRectRequest*) request.request_data;
+ const FillRectRequest* fillrectrequest
+ = (FillRectRequest*) request.request_data;
float x = request.pos.x;
float y = request.pos.y;
float w = fillrectrequest->size.x;
float h = fillrectrequest->size.y;
- glEnable(GL_BLEND);
- glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
- glColor4ub(fillrectrequest->color.red, fillrectrequest->color.green,
- fillrectrequest->color.blue, fillrectrequest->color.alpha);
-
- glBegin(GL_POLYGON);
+ glDisable(GL_TEXTURE_2D);
+ glColor4f(fillrectrequest->color.red, fillrectrequest->color.green,
+ fillrectrequest->color.blue, fillrectrequest->color.alpha);
+
+ glBegin(GL_QUADS);
glVertex2f(x, y);
glVertex2f(x+w, y);
glVertex2f(x+w, y+h);
glVertex2f(x, y+h);
glEnd();
- glDisable(GL_BLEND);
+ glEnable(GL_TEXTURE_2D);
+}
+
+void
+DrawingContext::draw_lightmap(const DrawingRequest& request) const
+{
+ const Texture* texture = reinterpret_cast<Texture*> (request.request_data);
+
+ // multiple the lightmap with the framebuffer
+ glBlendFunc(GL_DST_COLOR, GL_ZERO);
+
+ glBindTexture(GL_TEXTURE_2D, texture->get_handle());
+ glBegin(GL_QUADS);
+
+ glTexCoord2f(0, lightmap_uv_bottom);
+ glVertex2f(0, 0);
+
+ glTexCoord2f(lightmap_uv_right, lightmap_uv_bottom);
+ glVertex2f(SCREEN_WIDTH, 0);
+
+ glTexCoord2f(lightmap_uv_right, 0);
+ glVertex2f(SCREEN_WIDTH, SCREEN_HEIGHT);
+
+ glTexCoord2f(0, 0);
+ glVertex2f(0, SCREEN_HEIGHT);
+
+ glEnd();
- delete fillrectrequest;
+ glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
void
{
#ifdef DEBUG
assert(transformstack.empty());
+ assert(target_stack.empty());
#endif
transformstack.clear();
-
- std::stable_sort(drawingrequests.begin(), drawingrequests.end());
+ target_stack.clear();
+
+ //Use Lightmap if ambient color is not white.
+ bool use_lightmap = ( ambient_color.red != 1.0f || ambient_color.green != 1.0f ||
+ ambient_color.blue != 1.0f );
+
+ // PART1: create lightmap
+ if(use_lightmap) {
+ glViewport(0, screen->h - lightmap_height, lightmap_width, lightmap_height);
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ glOrtho(0, SCREEN_WIDTH, SCREEN_HEIGHT, 0, -1.0, 1.0);
+ glMatrixMode(GL_MODELVIEW);
+ glLoadIdentity();
+
+ glClearColor( ambient_color.red, ambient_color.green, ambient_color.blue, 1 );
+ glClear(GL_COLOR_BUFFER_BIT);
+ handle_drawing_requests(lightmap_requests);
+ lightmap_requests.clear();
+
+ glDisable(GL_BLEND);
+ glBindTexture(GL_TEXTURE_2D, lightmap->get_handle());
+ glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, screen->h - lightmap_height, lightmap_width, lightmap_height);
+
+ glViewport(0, 0, screen->w, screen->h);
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ glOrtho(0, SCREEN_WIDTH, SCREEN_HEIGHT, 0, -1.0, 1.0);
+ glMatrixMode(GL_MODELVIEW);
+ glLoadIdentity();
+ glEnable(GL_BLEND);
+
+ // add a lightmap drawing request into the queue
+ DrawingRequest* request = new(obst) DrawingRequest();
+ request->type = LIGHTMAPREQUEST;
+ request->layer = LAYER_HUD - 1;
+ request->request_data = lightmap;
+ requests->push_back(request);
+ }
+
+ //glClear(GL_COLOR_BUFFER_BIT);
+ handle_drawing_requests(drawing_requests);
+ drawing_requests.clear();
+ obstack_free(&obst, NULL);
+ obstack_init(&obst);
+ assert_gl("drawing");
+
+ // if a screenshot was requested, take one
+ if (screenshot_requested) {
+ do_take_screenshot();
+ screenshot_requested = false;
+ }
- for(DrawingRequests::iterator i = drawingrequests.begin();
- i != drawingrequests.end(); ++i) {
- switch(i->type) {
+ SDL_GL_SwapBuffers();
+}
+
+class RequestPtrCompare
+ : public std::binary_function<const DrawingRequest*,
+ const DrawingRequest*,
+ bool>
+{
+public:
+ bool operator()(const DrawingRequest* r1, const DrawingRequest* r2) const
+ {
+ return *r1 < *r2;
+ }
+};
+
+void
+DrawingContext::handle_drawing_requests(DrawingRequests& requests) const
+{
+ std::stable_sort(requests.begin(), requests.end(), RequestPtrCompare());
+
+ DrawingRequests::const_iterator i;
+ for(i = requests.begin(); i != requests.end(); ++i) {
+ const DrawingRequest& request = **i;
+
+ switch(request.type) {
case SURFACE:
{
- const Surface* surface = (const Surface*) i->request_data;
-
- if(i->zoom != 1.0)
- surface->impl->draw_stretched(i->pos.x * i->zoom, i->pos.y * i->zoom,
- (int)(surface->w * i->zoom), (int)(surface->h * i->zoom),
- i->alpha, i->drawing_effect);
- else
- surface->impl->draw(i->pos.x, i->pos.y, i->alpha, i->drawing_effect);
+ const Surface* surface = (const Surface*) request.request_data;
+ if (request.angle == 0.0f &&
+ request.color.red == 1.0f && request.color.green == 1.0f &&
+ request.color.blue == 1.0f && request.color.alpha == 1.0f) {
+ surface->draw(request.pos.x, request.pos.y, request.alpha,
+ request.drawing_effect);
+ } else {
+ surface->draw(request.pos.x, request.pos.y,
+ request.alpha, request.angle, request.color,
+ request.blend, request.drawing_effect);
+ }
break;
}
case SURFACE_PART:
- draw_surface_part(*i);
+ draw_surface_part(request);
break;
case GRADIENT:
- draw_gradient(*i);
+ draw_gradient(request);
break;
case TEXT:
- draw_text(*i);
+ draw_text(request);
break;
case FILLRECT:
- draw_filled_rect(*i);
+ draw_filled_rect(request);
+ break;
+ case LIGHTMAPREQUEST:
+ draw_lightmap(request);
+ break;
+ case GETLIGHT:
+ get_light(request);
break;
}
}
-
- drawingrequests.clear();
-
- // update screen
- SDL_GL_SwapBuffers();
}
void
}
void
-DrawingContext::set_drawing_effect(uint32_t effect)
+DrawingContext::set_drawing_effect(DrawingEffect effect)
{
transform.drawing_effect = effect;
}
-uint32_t
+DrawingEffect
DrawingContext::get_drawing_effect() const
{
return transform.drawing_effect;
}
void
-DrawingContext::set_zooming(float zoom)
+DrawingContext::set_alpha(float alpha)
+{
+ transform.alpha = alpha;
+}
+
+float
+DrawingContext::get_alpha() const
+{
+ return transform.alpha;
+}
+
+void
+DrawingContext::push_target()
{
- transform.zoom = zoom;
+ target_stack.push_back(target);
}
void
-DrawingContext::set_alpha(uint8_t alpha)
+DrawingContext::pop_target()
{
- transform.alpha = alpha;
+ set_target(target_stack.back());
+ target_stack.pop_back();
}
-uint8_t
-DrawingContext::get_alpha() const
+void
+DrawingContext::set_target(Target target)
{
- return transform.alpha;
+ this->target = target;
+ if(target == LIGHTMAP) {
+ requests = &lightmap_requests;
+ } else {
+ assert(target == NORMAL);
+ requests = &drawing_requests;
+ }
}
+
+void
+DrawingContext::set_ambient_color( Color new_color )
+{
+ ambient_color = new_color;
+}
+
+void
+DrawingContext::do_take_screenshot()
+{
+ // [Christoph] TODO: Yes, this method also takes care of the actual disk I/O. Split it?
+
+ // create surface to hold screenshot
+ #if SDL_BYTEORDER == SDL_BIG_ENDIAN
+ SDL_Surface* shot_surf = SDL_CreateRGBSurface(SDL_SWSURFACE, SCREEN_WIDTH, SCREEN_HEIGHT, 24, 0x00FF0000, 0x0000FF00, 0x000000FF, 0);
+ #else
+ SDL_Surface* shot_surf = SDL_CreateRGBSurface(SDL_SWSURFACE, SCREEN_WIDTH, SCREEN_HEIGHT, 24, 0x000000FF, 0x0000FF00, 0x00FF0000, 0);
+ #endif
+ if (!shot_surf) {
+ log_warning << "Could not create RGB Surface to contain screenshot" << std::endl;
+ return;
+ }
+
+ // read pixels into array
+ char* pixels = new char[3 * SCREEN_WIDTH * SCREEN_HEIGHT];
+ if (!pixels) {
+ log_warning << "Could not allocate memory to store screenshot" << std::endl;
+ SDL_FreeSurface(shot_surf);
+ return;
+ }
+ glReadPixels(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT, GL_RGB, GL_UNSIGNED_BYTE, pixels);
+
+ // copy array line-by-line
+ for (int i = 0; i < SCREEN_HEIGHT; i++) {
+ char* src = pixels + (3 * SCREEN_WIDTH * (SCREEN_HEIGHT - i - 1));
+ char* dst = ((char*)shot_surf->pixels) + i * shot_surf->pitch;
+ memcpy(dst, src, 3 * SCREEN_WIDTH);
+ }
+
+ // free array
+ delete[](pixels);
+
+ // save screenshot
+ static const std::string writeDir = PHYSFS_getWriteDir();
+ static const std::string dirSep = PHYSFS_getDirSeparator();
+ static const std::string baseName = "screenshot";
+ static const std::string fileExt = ".bmp";
+ std::string fullFilename;
+ for (int num = 0; num < 1000; num++) {
+ std::ostringstream oss;
+ oss << baseName;
+ oss << std::setw(3) << std::setfill('0') << num;
+ oss << fileExt;
+ std::string fileName = oss.str();
+ fullFilename = writeDir + dirSep + fileName;
+ if (!PHYSFS_exists(fileName.c_str())) {
+ SDL_SaveBMP(shot_surf, fullFilename.c_str());
+ log_debug << "Wrote screenshot to \"" << fullFilename << "\"" << std::endl;
+ SDL_FreeSurface(shot_surf);
+ return;
+ }
+ }
+ log_warning << "Did not save screenshot, because all files up to \"" << fullFilename << "\" already existed" << std::endl;
+ SDL_FreeSurface(shot_surf);
+}
+
+void
+DrawingContext::take_screenshot()
+{
+ screenshot_requested = true;
+}
+
projects / supertux.git / blobdiff