C++ (Cpp) GLTexture::Draw示例

示例#1

文件： Canvas.cpp 项目： damianob/xcsoar

void
Canvas::text_transparent(PixelScalar x, PixelScalar y, const TCHAR *text)
{
  assert(text != NULL);
  assert(ValidateUTF8(text));

#ifdef HAVE_GLES
  assert(x_offset == OpenGL::translate_x);
  assert(y_offset == OpenGL::translate_y);
#endif

  if (font == NULL)
    return;

  GLTexture *texture = TextCache::Get(font, text);
  if (texture == NULL)
    return;

  GLEnable scope(GL_TEXTURE_2D);
  texture->Bind();
  GLLogicOp logic_op(GL_AND_INVERTED);

  /* cut out the shape in black */
  OpenGL::glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
  texture->Draw(x, y);

  if (text_color != COLOR_BLACK) {
    /* draw the text color on top */
    OpenGL::glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
    logic_op.set(GL_OR);
    text_color.Set();
    texture->Draw(x, y);
  }
}

示例#2

文件： Canvas.cpp 项目： Adrien81/XCSoar

void
Canvas::DrawClippedText(int x, int y,
                        unsigned width, unsigned height,
                        const TCHAR *text)
{
  assert(text != nullptr);
  assert(ValidateUTF8(text));

#ifdef HAVE_GLES
  assert(offset == OpenGL::translate);
#endif

  if (font == nullptr)
    return;

  GLTexture *texture = TextCache::Get(*font, text);
  if (texture == nullptr)
    return;

  if (texture->GetHeight() < height)
    height = texture->GetHeight();
  if (texture->GetWidth() < width)
    width = texture->GetWidth();

  PrepareColoredAlphaTexture(text_color);

#ifndef USE_GLSL
  GLEnable scope(GL_TEXTURE_2D);
#endif

  const GLBlend blend(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

  texture->Bind();
  texture->Draw(x, y, width, height, 0, 0, width, height);
}

示例#3

文件： Canvas.cpp 项目： Adrien81/XCSoar

void
Canvas::DrawTransparentText(int x, int y, const TCHAR *text)
{
  assert(text != nullptr);
  assert(ValidateUTF8(text));

#ifdef HAVE_GLES
  assert(offset == OpenGL::translate);
#endif

  if (font == nullptr)
    return;

  GLTexture *texture = TextCache::Get(*font, text);
  if (texture == nullptr)
    return;

  PrepareColoredAlphaTexture(text_color);

#ifndef USE_GLSL
  GLEnable scope(GL_TEXTURE_2D);
#endif

  const GLBlend blend(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

  texture->Bind();
  texture->Draw(x, y);
}

示例#4

文件： Canvas.cpp 项目： Adrien81/XCSoar

void
Canvas::DrawText(int x, int y, const TCHAR *text)
{
  assert(text != nullptr);
  assert(ValidateUTF8(text));

#ifdef HAVE_GLES
  assert(offset == OpenGL::translate);
#endif

  if (font == nullptr)
    return;

  GLTexture *texture = TextCache::Get(*font, text);
  if (texture == nullptr)
    return;

  if (background_mode == OPAQUE)
    DrawFilledRectangle(x, y,
                        x + texture->GetWidth(), y + texture->GetHeight(),
                        background_color);

  PrepareColoredAlphaTexture(text_color);

#ifndef USE_GLSL
  GLEnable scope(GL_TEXTURE_2D);
#endif

  const GLBlend blend(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

  texture->Bind();
  texture->Draw(x, y);
}

示例#5

文件： Canvas.cpp 项目： damianob/xcsoar

void
Canvas::text(PixelScalar x, PixelScalar y, const TCHAR *text)
{
  assert(text != NULL);
  assert(ValidateUTF8(text));

#ifdef HAVE_GLES
  assert(x_offset == OpenGL::translate_x);
  assert(y_offset == OpenGL::translate_y);
#endif

  if (font == NULL)
    return;

  GLTexture *texture = TextCache::Get(font, text);
  if (texture == NULL)
    return;

  if (background_mode == OPAQUE)
    /* draw the opaque background */
    DrawFilledRectangle(x, y,
                        x + texture->GetWidth(), y + texture->GetHeight(),
                        background_color);

  GLEnable scope(GL_TEXTURE_2D);
  texture->Bind();
  GLLogicOp logic_op(GL_AND_INVERTED);

  if (background_mode != OPAQUE || background_color != COLOR_BLACK) {
    /* cut out the shape in black */
    OpenGL::glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
    texture->Draw(x, y);
  }

  if (text_color != COLOR_BLACK) {
    /* draw the text color on top */
    OpenGL::glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
    logic_op.set(GL_OR);
    text_color.Set();
    texture->Draw(x, y);
  }
}

示例#6

文件： Canvas.cpp 项目： DRIZO/xcsoar

void
Canvas::Stretch(int dest_x, int dest_y,
                unsigned dest_width, unsigned dest_height,
                const GLTexture &texture,
                int src_x, int src_y,
                unsigned src_width, unsigned src_height)
{
#ifdef HAVE_GLES
  assert(offset == OpenGL::translate);
#endif

  texture.Draw(dest_x, dest_y, dest_width, dest_height,
               src_x, src_y, src_width, src_height);
}

示例#7

文件： Canvas.cpp 项目： damianob/xcsoar

void
Canvas::Stretch(PixelScalar dest_x, PixelScalar dest_y,
                UPixelScalar dest_width, UPixelScalar dest_height,
                const GLTexture &texture,
                PixelScalar src_x, PixelScalar src_y,
                UPixelScalar src_width, UPixelScalar src_height)
{
#ifdef HAVE_GLES
  assert(x_offset == OpenGL::translate_x);
  assert(y_offset == OpenGL::translate_y);
#endif

  texture.Draw(dest_x, dest_y, dest_width, dest_height,
               src_x, src_y, src_width, src_height);
}