/* type = 0: draw outline content rectangle
* type = 1: draw XYZ image
* type = 2: draw RGB image
+ * See FragmentType enum below.
*/
"uniform int type = 0;\n"
"uniform vec4 outline_content_colour;\n"
"}\n";
+enum class FragmentType
+{
+ OUTLINE_CONTENT = 0,
+ XYZ_IMAGE = 1,
+ RGB_IMAGE = 2,
+};
+
+
void
GLVideoView::ensure_context ()
{
}
-/* Offset of video texture triangles in indices */
-static constexpr int indices_video_texture = 0;
-/* Offset of subtitle texture triangles in indices */
-static constexpr int indices_subtitle_texture = 6;
-/* Offset of content outline lines in indices */
-static constexpr int indices_outline_content = 12;
+/* Offset and number of indices for the things in the indices array below */
+static constexpr int indices_video_texture_offset = 0;
+static constexpr int indices_video_texture_number = 6;
+static constexpr int indices_subtitle_texture_offset = indices_video_texture_offset + indices_video_texture_number;
+static constexpr int indices_subtitle_texture_number = 6;
+static constexpr int indices_outline_content_offset = indices_subtitle_texture_offset + indices_subtitle_texture_number;
+static constexpr int indices_outline_content_number = 8;
static constexpr unsigned int indices[] = {
0, 1, 3, // video texture triangle #1
11, 8, // outline content line #4
};
+/* Offsets of things in the GL_ARRAY_BUFFER */
+static constexpr int array_buffer_video_offset = 0;
+static constexpr int array_buffer_subtitle_offset = array_buffer_video_offset + 4 * 5 * sizeof(float);
+static constexpr int array_buffer_outline_content_offset = array_buffer_subtitle_offset + 4 * 5 * sizeof(float);
+
void
GLVideoView::setup_shaders ()
glBindVertexArray(_vao);
check_gl_error ("glBindVertexArray");
- glUniform1i(_fragment_type, _optimise_for_j2k ? 1 : 2);
+ glUniform1i(_fragment_type, static_cast<GLint>(_optimise_for_j2k ? FragmentType::XYZ_IMAGE : FragmentType::RGB_IMAGE));
_video_texture->bind();
- glDrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_INT, reinterpret_cast<void*>(indices_video_texture * sizeof(int)));
+ glDrawElements (GL_TRIANGLES, indices_video_texture_number, GL_UNSIGNED_INT, reinterpret_cast<void*>(indices_video_texture_offset * sizeof(int)));
if (_have_subtitle_to_render) {
- glUniform1i(_fragment_type, 2);
+ glUniform1i(_fragment_type, static_cast<GLint>(FragmentType::RGB_IMAGE));
_subtitle_texture->bind();
- glDrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_INT, reinterpret_cast<void*>(indices_subtitle_texture * sizeof(int)));
+ glDrawElements (GL_TRIANGLES, indices_subtitle_texture_number, GL_UNSIGNED_INT, reinterpret_cast<void*>(indices_subtitle_texture_offset * sizeof(int)));
}
if (_viewer->outline_content()) {
- glUniform1i(_fragment_type, 0);
- glDrawElements (GL_LINES, 8, GL_UNSIGNED_INT, reinterpret_cast<void*>(indices_outline_content * sizeof(int)));
+ glUniform1i(_fragment_type, static_cast<GLint>(FragmentType::OUTLINE_CONTENT));
+ glDrawElements (GL_LINES, indices_outline_content_number, GL_UNSIGNED_INT, reinterpret_cast<void*>(indices_outline_content_offset * sizeof(int)));
check_gl_error ("glDrawElements");
}
Rectangle(canvas_size, inter_position.x + x_offset, inter_position.y + y_offset, inter_size)
: Rectangle(canvas_size, x_offset, y_offset, out_size);
- glBufferSubData (GL_ARRAY_BUFFER, 0, video.size(), video.vertices());
+ glBufferSubData (GL_ARRAY_BUFFER, array_buffer_video_offset, video.size(), video.vertices());
check_gl_error ("glBufferSubData (video)");
const auto outline_content = Rectangle(canvas_size, inter_position.x + x_offset, inter_position.y + y_offset, inter_size);
- glBufferSubData (GL_ARRAY_BUFFER, 8 * 5 * sizeof(float), outline_content.size(), outline_content.vertices());
+ glBufferSubData (GL_ARRAY_BUFFER, array_buffer_outline_content_offset, outline_content.size(), outline_content.vertices());
check_gl_error ("glBufferSubData (outline_content)");
}
if (_have_subtitle_to_render) {
const auto subtitle = Rectangle(canvas_size, inter_position.x + x_offset + text->position.x, inter_position.y + y_offset + text->position.y, text->image->size());
- glBufferSubData (GL_ARRAY_BUFFER, 4 * 5 * sizeof(float), subtitle.size(), subtitle.vertices());
+ glBufferSubData (GL_ARRAY_BUFFER, array_buffer_subtitle_offset, subtitle.size(), subtitle.vertices());
check_gl_error ("glBufferSubData (subtitle)");
}