+
+/**
+ * Render a BMP
+ * NOT PART OF THE DOCUMENT FORMAT
+ */
+void Screen::RenderBMP(const char * filename) const
+{
+ if (access(filename, R_OK) == -1)
+ {
+ Error("No such file \"%s\" - Nothing to render - You might have done this deliberately?", filename);
+ return;
+ }
+ SDL_Surface * bmp = SDL_LoadBMP(filename);
+ if (bmp == NULL)
+ Fatal("Failed to load BMP from %s - %s", filename, SDL_GetError());
+
+ int w = bmp->w;
+ int h = bmp->h;
+
+ GLenum texture_format;
+ switch (bmp->format->BytesPerPixel)
+ {
+ case 4: //contains alpha
+ texture_format = (bmp->format->Rmask == 0x000000FF) ? GL_RGBA : GL_BGRA;
+ break;
+ case 3: //does not contain alpha
+ texture_format = (bmp->format->Rmask == 0x000000FF) ? GL_RGB : GL_BGR;
+ break;
+ default:
+ Fatal("Could not understand SDL_Surface format (%d colours)", bmp->format->BytesPerPixel);
+ break;
+ }
+
+ //Debug("SDL_Surface %d BytesPerPixel, format %d (RGB = %d, BGR = %d, RGBA = %d, BGRA = %d)", bmp->format->BytesPerPixel, texture_format, GL_RGB, GL_BGR, GL_RGBA, GL_BGRA);
+
+ m_texture_prog.Use();
+ GraphicsBuffer quad_vertex_buffer;
+ quad_vertex_buffer.SetUsage(GraphicsBuffer::BufferUsageStaticDraw);
+ quad_vertex_buffer.SetType(GraphicsBuffer::BufferTypeVertex);
+ GLfloat quad[] = {
+ 0, 0, 0, 0,
+ 1, 0, ViewportWidth(), 0,
+ 1, 1, ViewportWidth(), ViewportHeight(),
+ 0, 1, 0, ViewportHeight()
+ };
+ quad_vertex_buffer.Upload(sizeof(GLfloat) * 16, quad);
+ quad_vertex_buffer.Bind();
+ m_viewport_ubo.Bind();
+
+ glUniform4f(m_colour_uniform_location, 1.0f, 1.0f, 1.0f, 1.0f);
+
+ GLuint texID;
+ glGenTextures(1, &texID);
+ glBindTexture(GL_TEXTURE_2D, texID);
+
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+ glTexImage2D(GL_TEXTURE_2D, 0, bmp->format->BytesPerPixel, w, h, 0, texture_format, GL_UNSIGNED_BYTE, bmp->pixels);
+
+ glEnableVertexAttribArray(0);
+ glEnableVertexAttribArray(1);
+ glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4*sizeof(float), (void*)(2*sizeof(float)));
+ glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4*sizeof(float), 0);
+ glDisableVertexAttribArray(1);
+ glDisableVertexAttribArray(0);
+ glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+
+ SDL_FreeSurface(bmp);
+}
+
+void Screen::DebugFontInit(const char *name, float font_size)
+{
+ unsigned char font_atlas_data[1024*1024];
+ FILE *font_file = fopen(name, "rb");
+ fseek(font_file, 0, SEEK_END);
+ size_t font_file_size = ftell(font_file);
+ fseek(font_file, 0, SEEK_SET);
+ unsigned char *font_file_data = (unsigned char*)malloc(font_file_size);
+ fread(font_file_data, 1, font_file_size, font_file);
+ fclose(font_file);
+ stbtt_BakeFontBitmap(font_file_data,0, font_size, font_atlas_data,1024,1024, 32,96, m_debug_font_rects);
+ free(font_file_data);
+ glGenTextures(1, &m_debug_font_atlas);
+ glBindTexture(GL_TEXTURE_2D, m_debug_font_atlas);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, 1024,1024, 0, GL_RED, GL_UNSIGNED_BYTE, font_atlas_data);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ m_debug_font_size = font_size;
+
+ m_debug_font_vertices.SetUsage(GraphicsBuffer::BufferUsageStreamDraw);
+ m_debug_font_vertices.SetType(GraphicsBuffer::BufferTypeVertex);
+ m_debug_font_vertices.Upload(8192, nullptr);
+ m_debug_font_vertex_head = 0;
+
+ m_debug_font_indices.SetUsage(GraphicsBuffer::BufferUsageStreamDraw);
+ m_debug_font_indices.SetType(GraphicsBuffer::BufferTypeIndex);
+ m_debug_font_indices.Resize(500);
+ m_debug_font_index_head = 0;
+}
+
+void Screen::DebugFontClear()
+{
+ m_debug_font_x = m_debug_font_y = 0;
+ if (!m_debug_font_atlas) return;
+ DebugFontPrint("\n");
+}
+
+void Screen::DebugFontFlush()
+{
+
+
+ glEnable(GL_BLEND);
+ glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+ glBindTexture(GL_TEXTURE_2D, m_debug_font_atlas);
+
+ m_texture_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), (void*)(2*sizeof(float)));
+ glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4*sizeof(float), 0);
+ 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_vertex_head = 0;
+ m_debug_font_index_head = 0;
+}
+
+void Screen::DebugFontPrint(const char* str)
+{
+ if (!m_debug_font_atlas) return;
+
+ float *vertexData = (float*)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);
+ uint16_t *indexData = (uint16_t*)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);
+ while (*str) {
+ if ((m_debug_font_vertex_head*sizeof(float) + 16*sizeof(float) >= m_debug_font_vertices.GetSize() ) ||
+ (m_debug_font_index_head*sizeof(uint16_t) + 5*sizeof(uint16_t) >= m_debug_font_indices.GetSize()))
+ {
+ m_debug_font_indices.UnMap();
+ m_debug_font_vertices.UnMap();
+ DebugFontFlush();
+ DebugFontPrint(str);
+ return;
+ }
+ if (*str >= 32 && *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);
+ *vertexData = q.s0; vertexData++;
+ *vertexData = q.t0; vertexData++;
+ *vertexData = q.x0; vertexData++;
+ *vertexData = q.y0; vertexData++;
+ *vertexData = q.s1; vertexData++;
+ *vertexData = q.t0; vertexData++;
+ *vertexData = q.x1; vertexData++;
+ *vertexData = q.y0; vertexData++;
+ *vertexData = q.s1; vertexData++;
+ *vertexData = q.t1; vertexData++;
+ *vertexData = q.x1; vertexData++;
+ *vertexData = q.y1; vertexData++;
+ *vertexData = q.s0; vertexData++;
+ *vertexData = q.t1; vertexData++;
+ *vertexData = q.x0; vertexData++;
+ *vertexData = q.y1; vertexData++;
+
+ *indexData = m_debug_font_vertex_head/4; indexData++;
+ *indexData = m_debug_font_vertex_head/4+1; indexData++;
+ *indexData = m_debug_font_vertex_head/4+3; indexData++;
+ *indexData = m_debug_font_vertex_head/4+2; indexData++;
+ *indexData = 65535; indexData++;
+
+ 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();
+ //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);
+}
git.ucc.asn.au / ipdf / code.git / blobdiff
UCC git Repository :: git.ucc.asn.au