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MLV/shapes.c
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267
MLV/shapes.c
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/*
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* This file is part of the MLV Library.
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*
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* Copyright (C) 2010,2011,2012 Adrien Boussicault, Marc Zipstein
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*
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*
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* This Library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This Library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this Library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "MLV_shape.h"
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#include "platform.h"
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#include "image.h"
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#ifndef MEMORY_DEBUG
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#if defined( OS_WINDOWS )
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# include <SDL/SDL_gfxPrimitives.h>
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#elif defined( OS_APPLE )
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# include <SDL/SDL_gfxPrimitives.h>
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#else
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# include <SDL/SDL_gfxPrimitives.h>
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#endif
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#else
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#include "memory_debug.h"
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#endif
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#include "data_structure.h"
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#include "warning_error.h"
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#include "memory_management.h"
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#include <stdarg.h>
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#include "data_structure.h"
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extern DataMLV *MLV_data;
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///////////////////////////////////////////////////////////////////////////////
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// Drawing operation on images //
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///////////////////////////////////////////////////////////////////////////////
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void MLV_draw_circle_on_image(int x, int y, int radius, MLV_Color color, MLV_Image* image){
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circleColor( image->surface, x, y, radius, color );
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}
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void MLV_draw_filled_circle_on_image(int x, int y, int radius, MLV_Color color, MLV_Image* image){
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filledCircleColor( image->surface, x, y, radius, color);
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}
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void MLV_draw_ellipse_on_image(int x, int y, int radius_x, int radius_y, MLV_Color color, MLV_Image* image){
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ellipseColor(image->surface,x,y,radius_x,radius_y,color);
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}
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void MLV_draw_filled_ellipse_on_image(int x, int y, int radius_x, int radius_y, MLV_Color color, MLV_Image* image){
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filledEllipseColor(image->surface,x,y,radius_x,radius_y,color);
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}
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void MLV_draw_polygon_on_image( const int* vx, const int* vy, int nb_points, MLV_Color color, MLV_Image* image){
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Sint16* tmp_vx = MLV_MALLOC( nb_points, Sint16 );
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Sint16* tmp_vy = MLV_MALLOC( nb_points, Sint16 );
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int i;
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for( i=0; i< nb_points; i++){
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tmp_vx[i] = vx[i];
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tmp_vy[i] = vy[i];
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}
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polygonColor( image->surface, tmp_vx, tmp_vy, nb_points, color);
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MLV_FREE( tmp_vx, Sint16 );
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MLV_FREE( tmp_vy, Sint16 );
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}
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void MLV_draw_filled_polygon_on_image( const int* vx, const int* vy, int nb_points, MLV_Color color, MLV_Image* image){
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Sint16* tmp_vx = MLV_MALLOC( nb_points, Sint16 );
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Sint16* tmp_vy = MLV_MALLOC( nb_points, Sint16 );
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int i;
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for( i=0; i< nb_points; i++){
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tmp_vx[i] = vx[i];
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tmp_vy[i] = vy[i];
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}
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filledPolygonColor( image->surface, tmp_vx, tmp_vy, nb_points, color);
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MLV_FREE( tmp_vx, Sint16 );
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MLV_FREE( tmp_vy, Sint16 );
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}
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void MLV_draw_bezier_curve_on_image( const int* vx, const int* vy, int nb_points, MLV_Color color, MLV_Image* image){
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Sint16* tmp_vx = MLV_MALLOC( nb_points, Sint16 );
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Sint16* tmp_vy = MLV_MALLOC( nb_points, Sint16 );
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int i;
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for( i=0; i< nb_points; i++){
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tmp_vx[i] = vx[i];
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tmp_vy[i] = vy[i];
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}
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bezierColor( image->surface, tmp_vx, tmp_vy, nb_points, 6 , color);
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MLV_FREE( tmp_vx, Sint16 );
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MLV_FREE( tmp_vy, Sint16 );
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}
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void MLV_draw_rectangle_on_image(int x, int y, int width, int height, MLV_Color color, MLV_Image* image){
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rectangleColor(image->surface, x, y, x+width-1, y+height-1, color);
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}
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void MLV_draw_filled_rectangle_on_image(int x, int y, int width, int height, MLV_Color color, MLV_Image* image){
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boxColor(image->surface, x, y, x+width-1, y+height-1, color);
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}
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void MLV_draw_line_on_image(int x1, int y1, int x2, int y2, MLV_Color color, MLV_Image* image){
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lineColor( image->surface, x1, y1, x2, y2, color);
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}
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void draw_pixel_on_sdl_surface( SDL_Surface* surface, int x, int y, MLV_Color color ){
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#if 0 // Je ne me souvient plus pourquoi pexelColor ne fonctionnait pas. Je crois que c'est la composante alpha qui pose problème.
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pixelColor(MLV_data->screen, x, y, color);
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#else
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SDL_LockSurface(surface);
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SDL_PixelFormat *fmt;
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Uint32 *pixel;
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fmt = surface->format;
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pixel = ((Uint32*) surface->pixels)+ y*surface->pitch/4 + x;
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Uint8 red, blue, green, alpha;
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MLV_convert_color_to_rgba( color, &red, &green, &blue, &alpha );
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int red_image, green_image, blue_image, alpha_image;
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get_pixel_on_image_unsafe(
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surface, x, y,
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&red_image, &green_image, &blue_image, &alpha_image
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);
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int inv_alpha = 255 - alpha;
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Uint32 red32 = ( alpha * red + inv_alpha * red_image )/255;
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Uint32 blue32 = ( alpha * blue + inv_alpha * blue_image )/255;
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Uint32 green32 = ( alpha * green + inv_alpha * green_image )/255;
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Uint32 alpha32 = alpha_image;
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/* set the Red component */
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red32 = red32 >> fmt->Rloss;
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red32 = red32 << fmt->Rshift;
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/* set the Green component */
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green32 = green32 >> fmt->Gloss;
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green32 = green32 << fmt->Gshift;
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/* set the Blue component */
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blue32 = blue32 >> fmt->Bloss;
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blue32 = blue32 << fmt->Bshift;
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/* set the Alpha component */
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alpha32 = alpha32 >> fmt->Aloss;
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alpha32 = alpha32 << fmt->Ashift;
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*pixel = red32 | green32 | blue32 | alpha32;
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SDL_UnlockSurface(surface);
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#endif
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}
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void draw_pixel( MLV_Image* image, int x, int y, MLV_Color color ){
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SDL_Surface* surface = image->surface;
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draw_pixel_on_sdl_surface( surface, x, y, color );
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}
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void MLV_draw_pixel_on_image(int x, int y, MLV_Color color, MLV_Image* image){
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draw_pixel( image, x, y, color);
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}
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void MLV_draw_point_on_image(int x, int y, MLV_Color color, MLV_Image* image){
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MLV_draw_pixel_on_image( x, y, color, image);
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}
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///////////////////////////////////////////////////////////////////////////////
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// Drawing operation on iscreen //
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///////////////////////////////////////////////////////////////////////////////
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void MLV_draw_circle(int x, int y, int radius, MLV_Color color){
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circleColor( MLV_data->screen, x, y, radius, color );
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}
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void MLV_draw_filled_circle(int x, int y, int radius, MLV_Color color){
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filledCircleColor( MLV_data->screen, x, y, radius, color);
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}
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void MLV_draw_ellipse(int x, int y, int radius_x, int radius_y, MLV_Color color){
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ellipseColor(MLV_data->screen,x,y,radius_x,radius_y,color);
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}
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void MLV_draw_filled_ellipse(int x, int y, int radius_x, int radius_y, MLV_Color color){
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filledEllipseColor(MLV_data->screen,x,y,radius_x,radius_y,color);
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}
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void MLV_draw_polygon( const int* vx, const int* vy, int nb_points, MLV_Color color){
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Sint16* tmp_vx = MLV_MALLOC( nb_points, Sint16 );
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Sint16* tmp_vy = MLV_MALLOC( nb_points, Sint16 );
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int i;
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for( i=0; i< nb_points; i++){
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tmp_vx[i] = vx[i];
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tmp_vy[i] = vy[i];
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}
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polygonColor( MLV_data->screen, tmp_vx, tmp_vy, nb_points, color);
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MLV_FREE( tmp_vx, Sint16 );
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MLV_FREE( tmp_vy, Sint16 );
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}
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void MLV_draw_filled_polygon( const int* vx, const int* vy, int nb_points, MLV_Color color){
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Sint16* tmp_vx = MLV_MALLOC( nb_points, Sint16 );
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Sint16* tmp_vy = MLV_MALLOC( nb_points, Sint16 );
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int i;
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for( i=0; i< nb_points; i++){
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tmp_vx[i] = vx[i];
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tmp_vy[i] = vy[i];
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}
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filledPolygonColor( MLV_data->screen, tmp_vx, tmp_vy, nb_points, color);
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MLV_FREE( tmp_vx, Sint16 );
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MLV_FREE( tmp_vy, Sint16 );
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}
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void MLV_draw_bezier_curve( const int* vx, const int* vy, int nb_points, MLV_Color color){
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Sint16* tmp_vx = MLV_MALLOC( nb_points, Sint16 );
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Sint16* tmp_vy = MLV_MALLOC( nb_points, Sint16 );
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int i;
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for( i=0; i< nb_points; i++){
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tmp_vx[i] = vx[i];
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tmp_vy[i] = vy[i];
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}
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bezierColor( MLV_data->screen, tmp_vx, tmp_vy, nb_points, 6 , color);
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MLV_FREE( tmp_vx, Sint16 );
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MLV_FREE( tmp_vy, Sint16 );
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}
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void MLV_draw_rectangle(int x, int y, int width, int height, MLV_Color color){
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rectangleColor(MLV_data->screen, x, y, x+width-1, y+height-1, color);
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}
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void MLV_draw_filled_rectangle(int x, int y, int width, int height, MLV_Color color){
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boxColor(MLV_data->screen, x, y, x+width-1, y+height-1, color);
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}
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void MLV_draw_line(int x1, int y1, int x2, int y2, MLV_Color color){
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lineColor( MLV_data->screen, x1, y1, x2, y2, color);
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}
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void MLV_draw_pixel(int x, int y, MLV_Color color){
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draw_pixel_on_sdl_surface( MLV_data->screen, x, y, color );
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}
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void MLV_draw_point(int x, int y, MLV_Color color){
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MLV_draw_pixel( x, y, color);
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}
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