C++ (Cpp) PixelRect::GetBottomLeft示例

示例#1

文件： Texture.cpp 项目： Adrien81/XCSoar

void
GLTexture::DrawFlipped(PixelRect dest, PixelRect src) const
{
#ifdef HAVE_OES_DRAW_TEXTURE
  if (OpenGL::oes_draw_texture) {
    DrawFlippedOES(dest, src);
    return;
  }
#endif

  const RasterPoint vertices[] = {
    dest.GetTopLeft(),
    dest.GetTopRight(),
    dest.GetBottomLeft(),
    dest.GetBottomRight(),
  };

  const ScopeVertexPointer vp(vertices);

  const PixelSize allocated = GetAllocatedSize();
  GLfloat x0 = (GLfloat)src.left / allocated.cx;
  GLfloat y0 = (GLfloat)src.top / allocated.cy;
  GLfloat x1 = (GLfloat)src.right / allocated.cx;
  GLfloat y1 = (GLfloat)src.bottom / allocated.cy;

  const GLfloat coord[] = {
    x0, y1,
    x1, y1,
    x0, y0,
    x1, y0,
  };

#ifdef USE_GLSL
  glEnableVertexAttribArray(OpenGL::Attribute::TEXCOORD);
  glVertexAttribPointer(OpenGL::Attribute::TEXCOORD, 2, GL_FLOAT, GL_FALSE,
                        0, coord);
#else
  glEnableClientState(GL_TEXTURE_COORD_ARRAY);
  glTexCoordPointer(2, GL_FLOAT, 0, coord);
#endif

  glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);

#ifdef USE_GLSL
  glDisableVertexAttribArray(OpenGL::Attribute::TEXCOORD);
  OpenGL::solid_shader->Use();
#else
  glDisableClientState(GL_TEXTURE_COORD_ARRAY);
#endif
}

示例#2

文件： GradientRenderer.cpp 项目： DRIZO/xcsoar

void
DrawVerticalGradient(Canvas &canvas, const PixelRect &rc,
                     Color top_color, Color bottom_color, Color fallback_color)
{
#if defined(EYE_CANDY) && defined(ENABLE_OPENGL)
  const RasterPoint vertices[] = {
    rc.GetTopLeft(),
    rc.GetTopRight(),
    rc.GetBottomLeft(),
    rc.GetBottomRight(),
  };

  glVertexPointer(2, GL_VALUE, 0, vertices);

  const Color colors[] = {
    top_color,
    top_color,
    bottom_color,
    bottom_color,
  };

  glEnableClientState(GL_COLOR_ARRAY);

#ifdef HAVE_GLES
  glColorPointer(4, GL_FIXED, 0, colors);
#else
  glColorPointer(4, GL_UNSIGNED_BYTE, 0, colors);
#endif

  static_assert(ARRAY_SIZE(vertices) == ARRAY_SIZE(colors),
                "Array size mismatch");

  glDrawArrays(GL_TRIANGLE_STRIP, 0, ARRAY_SIZE(vertices));

  glDisableClientState(GL_COLOR_ARRAY);
#else
  canvas.DrawFilledRectangle(rc, fallback_color);
#endif
}

示例#3

文件： Texture.cpp 项目： j-konopka/XCSoar-TE

void
GLTexture::DrawFlipped(PixelRect dest, PixelRect src) const
{
#ifdef HAVE_OES_DRAW_TEXTURE
  if (OpenGL::oes_draw_texture) {
    DrawFlippedOES(dest, src);
    return;
  }
#endif

  const RasterPoint vertices[] = {
    dest.GetTopLeft(),
    dest.GetTopRight(),
    dest.GetBottomLeft(),
    dest.GetBottomRight(),
  };

  glVertexPointer(2, GL_VALUE, 0, vertices);

  const PixelSize allocated = GetAllocatedSize();
  GLfloat x0 = (GLfloat)src.left / allocated.cx;
  GLfloat y0 = (GLfloat)src.top / allocated.cy;
  GLfloat x1 = (GLfloat)src.right / allocated.cx;
  GLfloat y1 = (GLfloat)src.bottom / allocated.cy;

  const GLfloat coord[] = {
    x0, y1,
    x1, y1,
    x0, y0,
    x1, y0,
  };

  glEnableClientState(GL_TEXTURE_COORD_ARRAY);
  glTexCoordPointer(2, GL_FLOAT, 0, coord);
  glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
  glDisableClientState(GL_TEXTURE_COORD_ARRAY);
}