Class: SDL::Renderer

Inherits:
Object
  • Object
show all
Defined in:
lib/graphics/simulation.rb,
ext/sdl/sdl.c

Overview

Renderer is the workhorse of the graphics gem. Everything graphical gets done through the renderer.

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#format ⇒ Object (readonly)

The PixelFormat for the current renderer.



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# File 'lib/graphics/simulation.rb', line 18

def format
  @format
end

#surface ⇒ Object (readonly)

The surface used by this renderer.



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# File 'lib/graphics/simulation.rb', line 23

def surface
  @surface
end

#window ⇒ Object (readonly)

The window for this renderer



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# File 'lib/graphics/simulation.rb', line 28

def window
  @window
end

Instance Method Details

#[](x, y) ⇒ Object

// SDL::Renderer methods:



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# File 'ext/sdl/sdl.c', line 821

static VALUE Renderer_index(VALUE self, VALUE x, VALUE y) {
  DEFINE_SELF(Renderer, renderer, self);

  SDL_Rect pixel_rect = { NUM2SINT16(x), NUM2SINT16(y), 1, 1 };

  if (!pixel)
    pixel = SDL_CreateRGBSurfaceWithFormat(0, 1, 1, 32,
                                           SDL_PIXELFORMAT_RGBA32);

  if (SDL_RenderReadPixels(renderer, &pixel_rect, SDL_PIXELFORMAT_RGBA32,
                           pixel->pixels,
                           pixel->pitch))
    FAILURE("Renderer#[]");

  return UINT2NUM(((Uint32*)pixel->pixels)[0]);
}

#[]=(x, y, color) ⇒ Object 



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# File 'ext/sdl/sdl.c', line 811

static VALUE Renderer_index_eq(VALUE self, VALUE x, VALUE y, VALUE color) {
  DEFINE_SELF(Renderer, renderer, self);

  pixelColor(renderer, NUM2SINT16(x), NUM2SINT16(y), VALUE2COLOR(color));

  return Qnil;
}

#blit(src_, x_, y_, a_, ws_, hs_, center_) ⇒ Object 



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# File 'ext/sdl/sdl.c', line 872

static VALUE Renderer_blit(VALUE self, VALUE src_,
                           VALUE x_, VALUE y_,
                           VALUE a_,
                           VALUE ws_, VALUE hs_,
                           VALUE center_) {
  DEFINE_SELF(Renderer, renderer, self);
  DEFINE_SELF(Surface, src, src_);

  int x    = NUM2SINT16(x_);
  int y    = NUM2SINT16(y_);
  double a = RTEST(a_)  ? -NUM2DBL(a_) : 0.0;
  float ws = RTEST(ws_) ? NUM2FLT(ws_) : 1.0;
  float hs = RTEST(hs_) ? NUM2FLT(hs_) : 1.0;

  SDL_Texture* texture;
  VALUE vtexture = rb_attr_get(src_, id_iv_texture);

  if (RTEST(vtexture)) {
    SET_SELF(Texture, texture, vtexture);
  } else {
    texture = SDL_CreateTextureFromSurface(renderer, src);
    if (!texture)
      FAILURE("_blit(SDL_CreateTextureFromSurface)");

    VALUE vtexture = TypedData_Wrap_Struct(cTexture, &_Texture_type, texture);

    rb_ivar_set(src_, id_iv_texture,  vtexture);
  }

  int w, h;
  if (SDL_QueryTexture(texture, NULL, NULL, &w, &h))
    FAILURE("_blit(SDL_QueryTexture)");

  SDL_Rect dst_rect = { x, y, w*ws, h*hs };

  if (SDL_SetTextureBlendMode(texture, SDL_BLENDMODE_BLEND))
    FAILURE("Renderer#blit(SetTextureBlendMode)");

  if (RTEST(a_) || RTEST(ws_) || RTEST(hs_)) {
    SDL_Point bottom_left  = { 0, h-1 };
    SDL_Point *point = (RTEST(center_) ? NULL : &bottom_left);

    if (SDL_RenderCopyEx(renderer, texture, NULL, &dst_rect,
                         a, point, SDL_FLIP_NONE))
      FAILURE("_blit(SDL_RenderCopyEx)");
  } else {
    if (SDL_RenderCopy(renderer, texture, NULL, &dst_rect))
      FAILURE("_blit(SDL_RenderCopyEx)");
  }

  return Qnil;
}

#clear(color) ⇒ Object 



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# File 'ext/sdl/sdl.c', line 723

static VALUE Renderer_clear(VALUE self, VALUE color) {
  DEFINE_SELF(Renderer, renderer, self);
  DEFINE_SELF(PixelFormat, format, rb_ivar_get(self, id_iv_format));

  Uint8 r, g, b, a;
  SDL_GetRGBA(NUM2UINT(color), format, &r, &g, &b, &a);

  SDL_SetRenderDrawColor(renderer, r, g, b, a);

  if (SDL_RenderClear(renderer))
    FAILURE("Renderer#clear");

  return Qnil;
}

#copy_texture(texture_) ⇒ Object 



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# File 'ext/sdl/sdl.c', line 738

static VALUE Renderer_copy_texture(VALUE self, VALUE texture_) {
  DEFINE_SELF(Renderer, renderer, self);
  DEFINE_SELF(Texture,  texture,  texture_);

  if (SDL_RenderCopy(renderer, texture, NULL, NULL))
    FAILURE("Renderer#copy_texture");

  return Qnil;
}

#draw_bezier(xs_, ys_, steps_, color_) ⇒ Object

int stringColor (SDL_Renderer *renderer, Sint16 x, Sint16 y, const char *s, Uint32 color)



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# File 'ext/sdl/sdl.c', line 544

static VALUE Renderer_draw_bezier(VALUE self,
                                  VALUE xs_,
                                  VALUE ys_,
                                  VALUE steps_,
                                  VALUE color_) {
  DEFINE_SELF(Renderer, renderer, self);

  int xlen = RARRAY_LENINT(xs_);
  int ylen = RARRAY_LENINT(ys_);

  if (xlen != ylen)
    rb_raise(rb_eArgError, "xs & ys are different length");

  Sint16 *xs = malloc(xlen*sizeof(Sint16));

  for (int i = 0; i < xlen; i++) {
    xs[i] = NUM2SINT16(RARRAY_AREF(xs_, i));
  }

  Sint16 *ys = malloc(ylen*sizeof(Sint16));
  for (int i = 0; i < ylen; i++) {
    ys[i] = NUM2SINT16(RARRAY_AREF(ys_, i));
  }

  int steps = NUM2INT(steps_);
  Uint32 color = VALUE2COLOR(color_);

  if (bezierColor(renderer, xs, ys, xlen, steps, color))
    FAILURE("draw_bezier");

  free(xs);
  free(ys);

  return Qnil;
}

#draw_circle(x, y, r, c, aa, f) ⇒ Object 



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# File 'ext/sdl/sdl.c', line 592

static VALUE Renderer_draw_circle(VALUE self,
                                  VALUE x,  VALUE y,
                                  VALUE r,
                                  VALUE c,
                                  VALUE aa, VALUE f) {
  DEFINE_SELF(Renderer, renderer, self);

  Uint8 idx = IDX2(RTEST(aa), RTEST(f));

  f_circle[idx](renderer,
                NUM2SINT16(x), NUM2SINT16(y),
                NUM2SINT16(r),
                NUM2UINT(c));

  return Qnil;
}

#draw_ellipse(x, y, rx, ry, c, aa, f) ⇒ Object 



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# File 'ext/sdl/sdl.c', line 621

static VALUE Renderer_draw_ellipse(VALUE self,
                                   VALUE x,  VALUE y,
                                   VALUE rx, VALUE ry,
                                   VALUE c,
                                   VALUE aa, VALUE f) {
  DEFINE_SELF(Renderer, renderer, self);

  Uint8 idx = IDX2(RTEST(aa), RTEST(f));

  f_ellipse[idx](renderer,
                 NUM2SINT16(x),
                 NUM2SINT16(y),
                 NUM2SINT16(rx),
                 NUM2SINT16(ry),
                 NUM2UINT(c));

  return Qnil;
}

#draw_line(x1, y1, x2, y2, c, aa) ⇒ Object 



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# File 'ext/sdl/sdl.c', line 643

static VALUE Renderer_draw_line(VALUE self,
                                VALUE x1, VALUE y1,
                                VALUE x2, VALUE y2,
                                VALUE c,
                                VALUE aa) {
  DEFINE_SELF(Renderer, renderer, self);

  Uint8 idx = IDX1(RTEST(aa));

  f_line[idx](renderer,
              NUM2SINT16(x1),
              NUM2SINT16(y1),
              NUM2SINT16(x2),
              NUM2SINT16(y2),
              VALUE2COLOR(c));

  return Qnil;
}

#draw_polygon(xs_, ys_, c, aa) ⇒ Object 



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# File 'ext/sdl/sdl.c', line 668

static VALUE Renderer_draw_polygon(VALUE self,
                                   VALUE xs_,
                                   VALUE ys_,
                                   VALUE c,
                                   VALUE aa) {
  DEFINE_SELF(Renderer, renderer, self);

  int xlen = RARRAY_LENINT(xs_);
  int ylen = RARRAY_LENINT(ys_);

  if (xlen != ylen)
    rb_raise(rb_eArgError, "xs & ys are different length");

  Sint16 *xs = malloc(xlen*sizeof(Sint16));
  for (int i = 0; i < xlen; i++) {
    xs[i] = NUM2SINT16(RARRAY_AREF(xs_, i));
  }

  Sint16 *ys = malloc(ylen*sizeof(Sint16));
  for (int i = 0; i < ylen; i++) {
    ys[i] = NUM2SINT16(RARRAY_AREF(ys_, i));
  }

  Uint8 idx = IDX1(RTEST(aa));

  if (f_polygon[idx](renderer, xs, ys, xlen, VALUE2COLOR(c)))
    FAILURE("draw_polygon");

  free(xs);
  free(ys);

  return Qnil;
}

#draw_rect(x_, y_, w_, h_, c, f) ⇒ Object 



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# File 'ext/sdl/sdl.c', line 705

static VALUE Renderer_draw_rect(VALUE self,
                                VALUE x_, VALUE y_,
                                VALUE w_, VALUE h_,
                                VALUE c,
                                VALUE f) {
  DEFINE_SELF(Renderer, renderer, self);

  Sint16 x1 = NUM2SINT16(x_);
  Sint16 y1 = NUM2SINT16(y_);
  Sint16 x2 = NUM2SINT16(w_) + x1;
  Sint16 y2 = NUM2SINT16(h_) + y1;
  Uint8 idx = IDX1(RTEST(f));

  f_rect[idx](renderer, x1, y1, x2, y2, NUM2UINT(c));

  return Qnil;
}

#fast_rect(x, y, w, h, color) ⇒ Object 



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# File 'ext/sdl/sdl.c', line 748

static VALUE Renderer_fast_rect(VALUE self,
                               VALUE x, VALUE y,
                               VALUE w, VALUE h,
                               VALUE color) {
  return Renderer_draw_rect(self, x, y, w, h, color, Qtrue);
}

#h ⇒ Object 



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# File 'ext/sdl/sdl.c', line 780

static VALUE Renderer_h(VALUE self) {
  DEFINE_SELF(Renderer, renderer, self);

  int w, h;

  SDL_GetRendererOutputSize(renderer, &w, &h);

  return INT2NUM(h);
}

#new_texture ⇒ Object 



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# File 'ext/sdl/sdl.c', line 438

static VALUE Renderer_new_texture(VALUE self) {
  DEFINE_SELF(Renderer, renderer, self);

  int w, h;
  if (SDL_GetRendererOutputSize(renderer, &w, &h))
    FAILURE("Renderer#new_texture(GetRendererOutputSize");

  SDL_Texture *texture = SDL_CreateTexture(renderer,
                                           SDL_PIXELFORMAT_RGBA32,
                                           SDL_TEXTUREACCESS_TARGET,
                                           w, h);
  if (!texture)
    FAILURE("Renderer#new_texture(CreateTexture)");

  return TypedData_Wrap_Struct(cTexture, &_Texture_type, texture);
}

#present ⇒ Object 



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# File 'ext/sdl/sdl.c', line 456

static VALUE Renderer_present(VALUE self) {
  DEFINE_SELF(Renderer, renderer, self);

  SDL_RenderPresent(renderer);

  return Qnil;
}

#save(path) ⇒ Object 



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# File 'ext/sdl/sdl.c', line 956

static VALUE Renderer_save(VALUE self, VALUE path) {
  DEFINE_SELF(Renderer, renderer, self);

  int w, h;
  SDL_GetRendererOutputSize(renderer, &w, &h);

  SDL_Surface *sshot = SDL_CreateRGBSurfaceWithFormat(0, w, h, 32,
                                                      SDL_PIXELFORMAT_RGBA32);
  if (SDL_RenderReadPixels(renderer, NULL, SDL_PIXELFORMAT_RGBA32,
                           sshot->pixels,
                           sshot->pitch))
    FAILURE("Renderer#save");
  int ret = IMG_SavePNG(sshot, RSTRING_PTR(path));
  SDL_FreeSurface(sshot);

  return INT2NUM(ret);
}

#sprite(w_, h_) ⇒ Object 



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# File 'ext/sdl/sdl.c', line 925

static VALUE Renderer_sprite(VALUE self, VALUE w_, VALUE h_) {
  UNUSED(self);

  int w   = NUM2INT(w_);
  int h   = NUM2INT(h_);
  int bpp = 32;

  SDL_Surface *surface =
    SDL_CreateRGBSurfaceWithFormat(0, w, h, bpp, SDL_PIXELFORMAT_RGBA32);
  if (!surface) FAILURE("Surface#sprite(CreateRGBSurfaceWithFormat)");

  SDL_Renderer *renderer = SDL_CreateSoftwareRenderer(surface);
  if (!renderer) FAILURE("Surface#sprite(CreateSoftwareRenderer)");

  // bumps the refcount and returns the same thing
  SDL_PixelFormat *format = SDL_AllocFormat(surface->format->format);
  if (format != surface->format)
    rb_raise(eSDLError, "SDL_AllocFormat freaked out. %p vs %p",
             format,
             surface->format);

  VALUE vrenderer = TypedData_Wrap_Struct(cRenderer,    &_Renderer_type,    renderer);
  VALUE vsurface  = TypedData_Wrap_Struct(cSurface,     &_Surface_type,     surface);
  VALUE vformat   = TypedData_Wrap_Struct(cPixelFormat, &_PixelFormat_type, format);

  rb_ivar_set(vrenderer, id_iv_surface, vsurface);
  rb_ivar_set(vrenderer, id_iv_format,  vformat);

  return vrenderer;
}

#target ⇒ Object 



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# File 'ext/sdl/sdl.c', line 985

static VALUE Renderer_target(VALUE self) {
  DEFINE_SELF(Renderer, renderer, self);

  SDL_Texture* texture = SDL_GetRenderTarget(renderer);

  if (!texture)
    FAILURE("Renderer#target");

  return TypedData_Wrap_Struct(cTexture, &_Texture_type, texture);
}

#target=(texture_) ⇒ Object 



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# File 'ext/sdl/sdl.c', line 996

static VALUE Renderer_target_eq(VALUE self, VALUE texture_) {
  DEFINE_SELF(Renderer, renderer, self);
  DEFINE_SELF0(Texture, texture, texture_);

  if (SDL_SetRenderTarget(renderer, texture))
    FAILURE("Renderer#target=");

  return texture_;
}

#title ⇒ Object

The title of the window.



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# File 'lib/graphics/simulation.rb', line 33

def title
  @window.title
end

#title=(s) ⇒ Object

Sets the title of the window.



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# File 'lib/graphics/simulation.rb', line 40

def title= s
  @window.title = s
end

#w ⇒ Object 



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# File 'ext/sdl/sdl.c', line 790

static VALUE Renderer_w(VALUE self) {
  DEFINE_SELF(Renderer, renderer, self);

  int w, h;

  SDL_GetRendererOutputSize(renderer, &w, &h);

  return INT2NUM(w);
}