+ m_debug_font_indices.SetUsage(GraphicsBuffer::BufferUsageStreamDraw);
+ m_debug_font_indices.SetType(GraphicsBuffer::BufferTypeIndex);
+ m_debug_font_indices.SetName("m_debug_font_indices");
+ m_debug_font_indices.Resize(500);
+ m_debug_font_index_head = 0;
+}
+
+void Screen::DebugFontClear()
+{
+ if (!Valid()) return;
+ m_debug_font_x = m_debug_font_y = 0;
+ if (!m_debug_font_atlas) return;
+ DebugFontPrint("\n");
+}
+
+void Screen::DebugFontFlush()
+{
+ if (!Valid()) return;
+ glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION, 40, -1, "Screen::DebugFontFlush()");
+
+ glEnable(GL_BLEND);
+ glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+ glBindTexture(GL_TEXTURE_2D, m_debug_font_atlas);
+
+ m_font_prog.Use();
+ m_viewport_ubo.Bind();
+ m_debug_font_vertices.Bind();
+ m_debug_font_indices.Bind();
+ glUniform4f(m_colour_uniform_location, 0,0,0,1);
+ glEnableVertexAttribArray(0);
+ glEnableVertexAttribArray(1);
+ glEnable(GL_PRIMITIVE_RESTART);
+ glPrimitiveRestartIndex(65535);
+ glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4*sizeof(float), 0);
+ glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4*sizeof(float), (void*)(2*sizeof(float)));
+ glDrawElements(GL_TRIANGLE_STRIP, m_debug_font_index_head, GL_UNSIGNED_SHORT, 0);
+ glDisable(GL_PRIMITIVE_RESTART);
+ glDisableVertexAttribArray(1);
+ glDisableVertexAttribArray(0);
+
+ glDisable(GL_BLEND);
+
+ m_debug_font_vertices.Invalidate();
+ m_debug_font_indices.Invalidate();
+ m_debug_font_vertex_head = 0;
+ m_debug_font_index_head = 0;
+
+ glPopDebugGroup();
+}
+
+struct fontvertex
+{
+ float x, y, s, t;
+};
+
+void Screen::DebugFontPrint(const char* str)
+{
+ if (!Valid()) return;
+ if (!m_debug_font_atlas || !m_show_debug_font) return;
+
+ glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION, 41, -1, "Screen::DebugFontPrint()");
+
+ BufferBuilder<fontvertex> vertexData(m_debug_font_vertices.MapRange(m_debug_font_vertex_head*sizeof(float), m_debug_font_vertices.GetSize() - m_debug_font_vertex_head*sizeof(float), false, true, true), m_debug_font_vertices.GetSize() - m_debug_font_vertex_head*sizeof(float));
+ BufferBuilder<uint16_t> indexData(m_debug_font_indices.MapRange(m_debug_font_index_head*sizeof(uint16_t), m_debug_font_indices.GetSize() - m_debug_font_index_head*sizeof(uint16_t), false, true, true), m_debug_font_indices.GetSize() - m_debug_font_index_head*sizeof(uint16_t));
+
+ size_t baseVertex = m_debug_font_vertex_head/4;
+ while (*str) {
+ if (!vertexData.Free(4) || !indexData.Free(5))
+ {
+ m_debug_font_indices.UnMap();
+ m_debug_font_vertices.UnMap();
+ DebugFontFlush();
+ DebugFontPrint(str);
+ glPopDebugGroup();
+ return;
+ }
+ if (*str >= 32 && (unsigned char)(*str) < 128) {
+ stbtt_aligned_quad q;
+ stbtt_GetBakedQuad(m_debug_font_rects, 1024,1024, *str-32, &m_debug_font_x,&m_debug_font_y,&q,1);
+ size_t index = vertexData.Add({q.x0, q.y0, q.s0, q.t0});
+ index += baseVertex;
+ indexData.Add(index);
+ index = vertexData.Add({q.x1, q.y0, q.s1, q.t0});
+ index += baseVertex;
+ indexData.Add(index);
+ index = vertexData.Add({q.x0, q.y1, q.s0, q.t1});
+ index += baseVertex;
+ indexData.Add(index);
+ index = vertexData.Add({q.x1, q.y1, q.s1, q.t1});
+ index += baseVertex;
+ indexData.Add(index);
+ indexData.Add(65535);
+
+ m_debug_font_vertex_head += 16;
+ m_debug_font_index_head += 5;
+
+ }
+ else if (*str == '\n')
+ {
+ m_debug_font_x = 0;
+ m_debug_font_y += m_debug_font_size;
+ }
+ ++str;
+ }
+ m_debug_font_indices.UnMap();
+ m_debug_font_vertices.UnMap();
+ glPopDebugGroup();
+ //DebugFontFlush();
+}
+
+void Screen::DebugFontPrintF(const char *fmt, ...)
+{
+ char buffer[BUFSIZ];
+ va_list va;
+ va_start(va, fmt);
+ vsnprintf(buffer, BUFSIZ, fmt,va);
+ va_end(va);
+ DebugFontPrint(buffer);