Hideously useless buffer perf optimization.
[ipdf/code.git] / src / screen.cpp
index 59d4334..ecc8c20 100644 (file)
@@ -2,6 +2,8 @@
 #include "screen.h"
 
 #include "SDL_opengl.h"
 #include "screen.h"
 
 #include "SDL_opengl.h"
+#include <fcntl.h> // for access(2)
+#include <unistd.h> // for access(2)
 
 using namespace IPDF;
 using namespace std;
 
 using namespace IPDF;
 using namespace std;
@@ -19,6 +21,8 @@ Screen::Screen()
 
        m_gl_context = SDL_GL_CreateContext(m_window);
 
 
        m_gl_context = SDL_GL_CreateContext(m_window);
 
+       m_debug_font_atlas = 0;
+
        ResizeViewport(800, 600);
 
        Clear();
        ResizeViewport(800, 600);
 
        Clear();
@@ -38,6 +42,7 @@ void Screen::Clear(float r, float g, float b, float a)
 {
        glClearColor(r,g,b,a);
        glClear(GL_COLOR_BUFFER_BIT);
 {
        glClearColor(r,g,b,a);
        glClear(GL_COLOR_BUFFER_BIT);
+       DebugFontClear();
 }
 
 void Screen::ResizeViewport(int width, int height)
 }
 
 void Screen::ResizeViewport(int width, int height)
@@ -81,7 +86,7 @@ bool Screen::PumpEvents()
                        m_last_mouse_y = evt.button.y;
                        if (m_mouse_handler)
                        {
                        m_last_mouse_y = evt.button.y;
                        if (m_mouse_handler)
                        {
-                               m_mouse_handler(evt.button.x, evt.button.y, evt.button.state, 0);
+                               m_mouse_handler(evt.button.x, evt.button.y, evt.button.state?evt.button.button:0, 0);
                        }
                        break;
                case SDL_MOUSEWHEEL:
                        }
                        break;
                case SDL_MOUSEWHEEL:
@@ -99,6 +104,7 @@ bool Screen::PumpEvents()
                                filename[0] = (char)evt.key.keysym.sym;
                                ScreenShot(filename);
                        }
                                filename[0] = (char)evt.key.keysym.sym;
                                ScreenShot(filename);
                        }
+                       break;
                }
                default:
                        break;
                }
                default:
                        break;
@@ -126,6 +132,8 @@ void Screen::SetMouseCursor(Screen::MouseCursors cursor)
 
 void Screen::Present()
 {
 
 void Screen::Present()
 {
+       if (m_debug_font_atlas)
+               DebugFontFlush();
        SDL_GL_SwapWindow(m_window);
 }
 
        SDL_GL_SwapWindow(m_window);
 }
 
@@ -169,6 +177,11 @@ void Screen::ScreenShot(const char * filename) const
  */
 void Screen::RenderBMP(const char * filename) const
 {
  */
 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());
        SDL_Surface * bmp = SDL_LoadBMP(filename);
        if (bmp == NULL)
                Fatal("Failed to load BMP from %s - %s", filename, SDL_GetError());
@@ -221,3 +234,128 @@ void Screen::RenderBMP(const char * filename) const
        glDisable(GL_TEXTURE_2D);
        SDL_FreeSurface(bmp);   
 }
        glDisable(GL_TEXTURE_2D);
        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_ALPHA, 1024,1024, 0, GL_ALPHA, 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;
+}
+
+void Screen::DebugFontClear()
+{
+       m_debug_font_x = m_debug_font_y = 0;
+       if (!m_debug_font_atlas) return;
+       DebugFontPrint("\n");
+}
+
+void Screen::DebugFontFlush()
+{
+       glBindFramebuffer(GL_FRAMEBUFFER, 0);
+       glMatrixMode(GL_PROJECTION);
+       glPushMatrix();
+       glLoadIdentity();
+       glOrtho(0,ViewportWidth(), ViewportHeight(), 0, -1, 1);
+       glMatrixMode(GL_MODELVIEW);
+       glPushMatrix();
+       glLoadIdentity();
+       
+       glColor4f(0,0,0,1);
+       
+               
+       glEnable(GL_TEXTURE_2D);
+       glEnable(GL_BLEND);
+       glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+       glBindTexture(GL_TEXTURE_2D, m_debug_font_atlas);
+
+       m_debug_font_vertices.Bind();
+       glEnableClientState(GL_VERTEX_ARRAY);
+       glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+       glVertexPointer(2, GL_FLOAT, 4*sizeof(float), (void*)(2*sizeof(float)));
+       glTexCoordPointer(2, GL_FLOAT, 4*sizeof(float), 0);
+       glDrawArrays(GL_QUADS, 0, m_debug_font_vertex_head/4);
+       glDisableClientState(GL_VERTEX_ARRAY);
+       glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+
+       glDisable(GL_BLEND);
+       glDisable(GL_TEXTURE_2D);
+       glPopMatrix();
+       glMatrixMode(GL_PROJECTION);
+       glPopMatrix();
+
+       m_debug_font_vertex_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);
+       while (*str) {
+               if (m_debug_font_vertex_head*sizeof(float) + 16*sizeof(float) >= m_debug_font_vertices.GetSize() )
+               {
+                       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++;
+
+                       m_debug_font_vertex_head += 16;
+
+               }
+               else if (*str == '\n')
+               {
+                       m_debug_font_x = 0;
+                       m_debug_font_y += m_debug_font_size;
+               }
+               ++str;
+       }
+       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);
+}

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