Real that uses Fast2Sum for addition

[ipdf/code.git] / src / screen.cpp

diff --git a/src/screen.cpp b/src/screen.cpp
index 01e7364..5c3957c 100644 (file)
--- a/src/screen.cpp
+++ b/src/screen.cpp
@@ -2,6 +2,8 @@
 #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;
@@ -38,6 +40,7 @@ void Screen::Clear(float r, float g, float b, float a)
 {
        glClearColor(r,g,b,a);
        glClear(GL_COLOR_BUFFER_BIT);
+       DebugFontClear();
 }
 
 void Screen::ResizeViewport(int width, int height)
@@ -81,7 +84,7 @@ bool Screen::PumpEvents()
                        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:
@@ -99,6 +102,7 @@ bool Screen::PumpEvents()
                                filename[0] = (char)evt.key.keysym.sym;
                                ScreenShot(filename);
                        }
+                       break;
                }
                default:
                        break;
@@ -139,7 +143,6 @@ void Screen::ScreenShot(const char * filename) const
        if (pixels == NULL)
                Fatal("Failed to allocate %d x %d x 4 = %d pixel array", w, h, w*h*4);
 
-
        for (int y = 0; y < h; ++y)
        {
                glReadPixels(0,h-y-1,w, 1, GL_RGBA, GL_UNSIGNED_BYTE, &pixels[y*w*4]);
@@ -170,6 +173,11 @@ void Screen::ScreenShot(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());
@@ -222,3 +230,79 @@ void Screen::RenderBMP(const char * filename) const
        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;
+}
+
+void Screen::DebugFontClear()
+{
+       m_debug_font_x = m_debug_font_y = 0;
+       DebugFontPrint("\n");
+}
+
+void Screen::DebugFontPrint(const char* str)
+{
+       glMatrixMode(GL_PROJECTION);
+       glPushMatrix();
+       glLoadIdentity();
+       glOrtho(0,ViewportWidth(), ViewportHeight(), 0, -1, 1);
+       glMatrixMode(GL_MODELVIEW);
+       glPushMatrix();
+       glLoadIdentity();
+       
+       
+       
+       glEnable(GL_TEXTURE_2D);
+       glEnable(GL_BLEND);
+       glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+       glBindTexture(GL_TEXTURE_2D, m_debug_font_atlas);
+       glBegin(GL_QUADS);
+       while (*str) {
+               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);
+                       glTexCoord2f(q.s0,q.t0); glVertex2f(q.x0,q.y0);
+                       glTexCoord2f(q.s1,q.t0); glVertex2f(q.x1,q.y0);
+                       glTexCoord2f(q.s1,q.t1); glVertex2f(q.x1,q.y1);
+                       glTexCoord2f(q.s0,q.t1); glVertex2f(q.x0,q.y1);
+               }
+               else if (*str == '\n')
+               {
+                       m_debug_font_x = 0;
+                       m_debug_font_y += m_debug_font_size;
+               }
+               ++str;
+       }
+       glEnd();
+       glDisable(GL_BLEND);
+       glDisable(GL_TEXTURE_2D);
+       glPopMatrix();
+       glMatrixMode(GL_PROJECTION);
+       glPopMatrix();
+}
+
+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);
+}