+++ /dev/null
-#include "graphics.h"
-#include <cmath>
-#include <cassert>
-#include <iostream>
-
-
-#undef DEBUG
-//#define DEBUG
-
-std::list<SDL_Surface*> Graphics::allTextures = std::list<SDL_Surface*>();
-Screen * Graphics::screen = NULL;
-
-int Graphics::screenWidth = 0;
-int Graphics::screenHeight = 0;
-bool Graphics::initialised = false;
-
-using namespace std;
-
-Texture::Texture(const char * filename, bool newDrawCentred) : surface(NULL), texture(0), drawCentred(newDrawCentred)
-{
- #ifdef DEBUG
- printf("Texture::Texture - loading \"%s\".\n", filename);
- #endif //DEBUG
-
- surface = Graphics::LoadTextureBMP(filename);
- if (surface == NULL)
- {
- fprintf(stderr, "Texture::Texture - Could not open texture from file \"%s\"! ABORT\n", filename);
- exit(EXIT_FAILURE);
- }
-
- GLenum texture_format;
- GLint nOfColours = surface->format->BytesPerPixel;
- switch (nOfColours)
- {
- case 4: //contains alpha
- texture_format = (surface->format->Rmask == 0x000000FF) ? GL_RGBA : GL_BGRA;
- break;
- case 3: //does not contain alpha
- texture_format = (surface->format->Rmask == 0x000000FF) ? GL_RGB : GL_BGR;
- break;
- default:
- fprintf(stderr,"Texture::Texture - Could not understand SDL_Surface format (%d colours)! ABORT\n", nOfColours);
- exit(EXIT_FAILURE);
- break;
- }
-
- glGenTextures(1, &texture);
- glBindTexture(GL_TEXTURE_2D, texture);
- glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
- glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
- glTexImage2D(GL_TEXTURE_2D, 0, nOfColours, surface->w, surface->h,0, texture_format, GL_UNSIGNED_BYTE, surface->pixels);
-
-}
-
-Texture::~Texture()
-{
- #ifdef DEBUG
- printf("Texture::~Texture - %p has been deleted. glDeleteTexture and SDL_FreeSurface here.\n", (void*)(this));
- #endif //DEBUG
- glDeleteTextures(1, &texture);
- //SDL_FreeSurface(surface);
-}
-
-void Texture::DrawColour(int x, int y, double angle, double scale, Colour colour)
-{
- if (scale > surface->w || scale > surface->h)
- {
- Graphics::DrawPixel(x/scale,y/scale,colour);
- }
- else
- {
- glColor3f(colour.r,colour.g,colour.b);
- Draw(x,y,angle,scale);
- glColor3f(1,1,1);
- }
-}
-
-void Texture::Draw(int x, int y, double angle , double scale )
-{
- //Draws the CENTRE of the texture at x, y, rotated by angle
-
- #ifdef DEBUG
- printf(" Texture::Draw - Drawing %p at (%d, %d) ; angle %2f ; scale % 2f\n", (void*)(this), x, y, angle, scale);
- #endif //DEBUG
-
- //if (x/scale < 0 || x/scale > Graphics::ScreenWidth() || y/scale < 0 || y/scale > Graphics::ScreenHeight() )
- // return;
-
- glPushMatrix(); //NOT deprecated
-
-
- glTranslatef(x/scale, y/scale,0);
-
- if (scale > surface->w || scale > surface->h)
- {
- Graphics::DrawPixel(0,0, Colour(255,255,255));
- }
- else
- {
- glRotated(angle, 0, 0, 1);
- glEnable(GL_TEXTURE_2D);
- glBindTexture(GL_TEXTURE_2D, texture);
- glBegin(GL_QUADS);
-
- //scale /= 2;
- if (drawCentred)
- {
- glTexCoord2i(0,0); glVertex3f(-0.5f/scale*surface->w ,-0.5f/scale*surface->h,0); //bottom left
- glTexCoord2i(1,0); glVertex3f(0.5f/scale*surface->w,-0.5f/scale*surface->h,0); //bottom right
- glTexCoord2i(1,1); glVertex3f(0.5f/scale*surface->w,0.5f/scale*surface->h,0); //top right
- glTexCoord2i(0,1); glVertex3f(-0.5f/scale*surface->w,0.5f/scale*surface->h,0); //top left
- }
- else
- {
- glTexCoord2i(0,0); glVertex3f(0 ,0,0); //bottom left
- glTexCoord2i(1,0); glVertex3f(1.0f/scale*surface->w,0,0); //bottom right
- glTexCoord2i(1,1); glVertex3f(1.0f/scale*surface->w,1.0f/scale*surface->h,0); //top right
- glTexCoord2i(0,1); glVertex3f(0,1.0f/scale*surface->h,0); //top left
- }
-
- glEnd();
- glDisable(GL_TEXTURE_2D);
- }
- glPopMatrix();
-
-}
-
-
-Font::Font(const char * filename, int newWidth, int newHeight) : Texture(filename), width(newWidth), height(newHeight)
-{
-
-}
-
-Font::~Font()
-{
-
-}
-
-void Font::DrawText(const char * string, int x, int y, double angle, double scale)
-{
- #ifdef DEBUG
- printf("Font::DrawText - drawing \"%s\"\n", string);
- #endif //DEBUG
- glPushMatrix(); //NOT deprecated
- glTranslatef(x, y,0);
- glRotated(angle, 0, 0, 1);
-
- glEnable(GL_TEXTURE_2D);
- glBindTexture(GL_TEXTURE_2D, texture);
-
-
- for (int ii=0; string[ii] != '\0'; ++ii)
- {
- if (string[ii] != ' ')
- {
- glPushMatrix();
- glTranslatef(ii*(float)(width)/(float)(scale),0,0);
-
- int index = (int)(string[ii]) - (int)('!');
- if (index < 0 || index > (int)('~') - (int)('!'))
- index = (int)('~') - (int)('!') + 1;
-
- float start = (float)(((((float)(index))*((float)(width)))-3.0f)/((float)surface->w));
- float end = (float)(((((float)(index+1))*((float)(width)))-4.0f)/((float)surface->w));
- if (start < 0) {start = 0;} if (end > 1) {end = 1;}
- glBegin(GL_QUADS);
- glTexCoord2f(start,0); glVertex3f(-0.5f/scale*width ,-0.5f/scale*height,0); //bottom left
- glTexCoord2f(end,0); glVertex3f(0.5f/scale*width,-0.5f/scale*height,0); //bottom right
- glTexCoord2f(end,1); glVertex3f(0.5f/scale*width,0.5f/scale*height,0); //top right
- glTexCoord2f(start,1); glVertex3f(-0.5f/scale*width,0.5f/scale*height,0); //top left
- //printf("Index %d - Drawing %c - maps to %f->%f\n", index,string[ii],start,end);
-
- glEnd();
- glPopMatrix();
- }
- }
-
-
- glDisable(GL_TEXTURE_2D);
- glPopMatrix();
-
-}
-
-
-void Graphics::Initialise(const char * caption, int newWidth, int newHeight)
-{
- if (Initialised())
- {
- std::cerr << "Graphics have already been initialised! Fatal Error\n";
- exit(EXIT_FAILURE);
- }
- screenWidth = newWidth; screenHeight = newHeight;
-
- if (SDL_Init(SDL_INIT_VIDEO) != 0)
- {
- std::cerr << "Couldn't init SDL!\n";
- exit(EXIT_FAILURE);
- }
- // atexit(Graphics::Destroy); BREAKS THINGS
-
- SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1); //According to sulix does not matter. (much)
-
-
-
-
- screen = SDL_SetVideoMode(screenWidth,screenHeight, 32, SDL_OPENGL);
- if ( screen == NULL )
- {
- std::cerr << "Couldn't set " << screenWidth << "x" << screenHeight << "x32 video mode: " << SDL_GetError() << "\n";
- exit(EXIT_FAILURE);
- }
-
- //COMES AFTER SETVIDEO MODE
- glEnable(GL_TEXTURE_2D);
- glClearColor(1,1,1,0); //Set clear colour (white) here
- glViewport(0,0,screenWidth,screenHeight); //DOES matter
- glClear(GL_COLOR_BUFFER_BIT);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glOrtho(0,screenWidth,screenHeight,0,-1,1);
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
- glDisable(GL_DEPTH_TEST);
- SDL_WM_SetCaption( caption, NULL);
-
- Graphics::initialised = true;
-
-}
-
-void Graphics::Destroy()
-{
- list<SDL_Surface*>::iterator i(allTextures.begin());
- while (i != allTextures.end())
- {
- SDL_FreeSurface((*i));
- ++i;
- }
- SDL_Quit();
-}
-
-SDL_Surface * Graphics::LoadTextureBMP(const char * file)
-{
- SDL_Surface * tmp = SDL_LoadBMP(file);
- if (tmp == NULL)
- return NULL;
- //assert(tmp != NULL);
-
-
- if (Graphics::screen != NULL)
- {
- SDL_Surface * tex = SDL_DisplayFormat(tmp);
- SDL_FreeSurface(tmp);
-
- allTextures.push_back(tex);
- return tex;
- }
- return tmp;
-}
-
-void Graphics::SaveTextureBMP(SDL_Surface * tex, const char * file)
-{
- SDL_SaveBMP(tex, file);
-}
-
-
-void Graphics::DrawTexture(SDL_Surface * tex, int destX, int destY, int srcX, int srcY, int w, int h)
-{
- if (w < 0) {w = tex->w - srcX;}
- if (h < 0) {h = tex->h - srcY;}
- Graphics::DrawTexture(screen, tex, destX, destY, srcX, srcY, w, h);
-}
-
-void Graphics::DrawTexture(SDL_Surface * dest, SDL_Surface * tex, int destX, int destY, int srcX, int srcY, int width, int height)
-{
- if ((destX < 0)||(destX >= dest->w)||(destY < 0)||(destY >= dest->h)
- ||(srcX < 0)||(srcX >= tex->w)||(srcY < 0)||(srcY >= tex->h))
- return;
-
- assert(dest->format->BitsPerPixel == 32);
- assert(tex->format->BitsPerPixel == 32);
-
- if (SDL_MUSTLOCK(tex))
- SDL_LockSurface(tex);
-
- if (SDL_MUSTLOCK(dest))
- SDL_LockSurface(dest);
-
-
-
- Colour transparent = Graphics::GetPixel(tex, srcX, srcY);
- //printf("transparent from %d %d\n", srcX, srcY);
-
- for (int xOff = 0; xOff < width; xOff++)
-
- {
- for (int yOff = 0; yOff < height; yOff++)
- {
- Colour nextColour = Graphics::GetPixel(tex, srcX+xOff, srcY+yOff);
- if (nextColour != transparent)
- {
- Graphics::DrawPixel(dest, destX + xOff, destY + yOff, nextColour);
- }
- }
- }
-
- if (SDL_MUSTLOCK(tex))
- SDL_UnlockSurface(tex);
-
- if (SDL_MUSTLOCK(dest))
- SDL_UnlockSurface(dest);
-
-}
-
-void Graphics::ClearScreen()
-{
- //SDL_FillRect(screen, NULL ,Graphics::MakeColour(0,0,0));
- glClear(GL_COLOR_BUFFER_BIT);
-
-}
-
-void Graphics::UpdateScreen()
-{
- SDL_GL_SwapBuffers();
- //SDL_Flip(screen);
-}
-
-void Graphics::DrawPixel(int x, int y, Colour colour)
-{
- DrawPixel(screen, x, y, colour);
-}
-
-void Graphics::DrawPixel(SDL_Surface * dest, int x, int y, Colour colour)
-{
- glBegin(GL_POINTS);
- glColor4f(colour.r/255, colour.g/255, colour.b/255, colour.a);
- glVertex2f(x, y);
- glColor3f(1,1,1);
- glEnd();
-}
-
-void Graphics::DrawGrid(int gridWidth, int gridHeight, Colour colour)
-{
- for (int x = 0; x < screen->w; x+=gridWidth)
- {
- Graphics::DrawLine(x,0, x,screen->h - 1, colour);
- }
- for (int y = 0; y < screen->h; y+=gridHeight)
- {
- Graphics::DrawLine(0,y, screen->w - 1,y, colour);
- }
-}
-
-Uint8 Graphics::MakeColour(int R, int G, int B, int Alpha)
-{
- return SDL_MapRGB(screen->format,R,G,B);
-}
-
-Colour Graphics::GetPixel(int x, int y)
-{
- return Graphics::GetPixel(screen, x, y);
-}
-
-Colour Graphics::GetPixel(SDL_Surface * src, int x, int y)
-{
- //Convert the pixels to 32 bit
- Uint8 * pixels = (Uint8*)src->pixels;
- //Get the requested pixel
-
- if (((y > 0)&&(y < src->h)) && ((x > 0)&&(x < src->w)))
- return ConvertColour(pixels[ ( y * src->w ) + x ]);
- return Colour(0,0,0,0);
-
-}
-
-
-
-void Graphics::DrawLine(int x1, int y1, int x2, int y2, Colour colour,double scale)
-{
- //printf("DRAW LINE\n");
- glColor4f(colour.r/255,colour.g/255,colour.b/255,colour.a);
- glBegin(GL_LINES);
- glVertex2f(x1/scale, y1/scale); // origin of the line
- glVertex2f(x2/scale, y2/scale); // ending point of the line
- glColor3f(1,1,1);
- glEnd();
-
-
-}
-
-void Graphics::DrawLineDashed(int x1, int y1, int x2, int y2, Colour colour, double scale)
-{
- glLineStipple(8, 0xAAAA);
- glEnable(GL_LINE_STIPPLE);
- DrawLine(x1,y1,x2,y2,colour,scale);
- glDisable(GL_LINE_STIPPLE);
- glEnd();
-}
-
-void Graphics::DrawRectangle(int topX, int topY, int botX, int botY, Colour colour, double scale)
-{
- glColor4f(colour.r/255,colour.g/255,colour.b/255,colour.a);
- glBegin(GL_LINES);
- glVertex2f(topX/scale, topY/scale); // origin of the rectangle
- glVertex2f(botX/scale, topY/scale); // point1
- glVertex2f(botX/scale, botY/scale); // point2
- glVertex2f(topX/scale, botY/scale); // point3
- glVertex2f(topX/scale, topY/scale); // point4
- glEnd();
-}
-
-Colour Graphics::ConvertColour(Uint8 from)
-{
- SDL_PixelFormat * fmt=screen->format;
- Colour result;
-
- Uint8 temp;
-
- //Get red
- temp=from&fmt->Rmask; /* Isolate red component */
- temp=temp>>fmt->Rshift;/* Shift it down to 8-bit */
- temp=temp<<fmt->Rloss; /* Expand to a full 8-bit number */
- result.r = (float)(temp);
-
- //Get green
- temp=from&fmt->Gmask; /* Isolate red component */
- temp=temp>>fmt->Gshift;/* Shift it down to 8-bit */
- temp=temp<<fmt->Gloss; /* Expand to a full 8-bit number */
- result.g = (float)(temp);
-
- //Get blue
- temp=from&fmt->Bmask; /* Isolate red component */
- temp=temp>>fmt->Bshift;/* Shift it down to 8-bit */
- temp=temp<<fmt->Bloss; /* Expand to a full 8-bit number */
- result.b = (float)(temp);
-
- //Get alpha
- temp=from&fmt->Amask; /* Isolate red component */
- temp=temp>>fmt->Ashift;/* Shift it down to 8-bit */
- temp=temp<<fmt->Aloss; /* Expand to a full 8-bit number */
- result.a = (float)(temp);
- return result;
-}
-
-
-
-
-
-
git.ucc.asn.au / progcomp2012.git / blobdiff
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