X-Git-Url: http://deadsoftware.ru/gitweb?a=blobdiff_plain;f=src%2Fengine%2Fe_graphics.pas;h=af999b19d4d3efb3373fd9ee9042b8395cd287fc;hb=0f3497482f06d52b2fe047b568790897e1ed1644;hp=4612a400e8a0055bfe3d7bf85e45e907a2bd942e;hpb=1c7e7630a308e9c9dc03f1e6f3483f9ce8f52618;p=d2df-sdl.git

diff --git a/src/engine/e_graphics.pas b/src/engine/e_graphics.pas
index 4612a40..af999b1 100644
--- a/src/engine/e_graphics.pas
+++ b/src/engine/e_graphics.pas
@@ -62,7 +62,7 @@ type
 procedure e_InitGL();
 procedure e_SetViewPort(X, Y, Width, Height: Word);
 procedure e_ResizeWindow(Width, Height: Integer);
-procedure e_ResizeFramebuffer(Width, Height: Integer);
+function e_ResizeFramebuffer(Width, Height: Integer): Boolean;
 procedure e_BlitFramebuffer(WinWidth, WinHeight: Integer);
 
 procedure e_Draw(ID: DWORD; X, Y: Integer; Alpha: Byte; AlphaChannel: Boolean;
@@ -201,6 +201,7 @@ var
   //e_SavedTextures: array of TSavedTexture;
   e_FBO: GLuint = 0;
   e_RBO: GLuint = 0;
+  e_RBOSupported: Boolean = True;
   e_Frame: GLuint = 0;
   e_FrameW: Integer = -1;
   e_FrameH: Integer = -1;
@@ -379,10 +380,8 @@ begin
  if Height <> nil then Height^ := e_Textures[ID].tx.Height;
 end;
 
-procedure e_ResizeFramebuffer(Width, Height: Integer);
+procedure DestroyFramebuffer;
 begin
-  if e_NoGraphics then Exit;
-
   glBindTexture(GL_TEXTURE_2D, 0);
   glBindRenderbuffer(GL_RENDERBUFFER, 0);
   glBindFramebuffer(GL_FRAMEBUFFER, 0);
@@ -404,25 +403,69 @@ begin
     glDeleteFramebuffers(1, @e_FBO);
     e_FBO := 0;
   end;
+end;
+
+function e_ResizeFramebuffer(Width, Height: Integer): Boolean;
+begin
+  Result := False;
+
+  if e_NoGraphics then Exit;
+
+  DestroyFramebuffer;
 
   e_FrameW := Width;
   e_FrameH := Height;
 
+  glGetError();
+
   glGenFramebuffers(1, @e_FBO);
 
+  if glGetError() <> GL_NO_ERROR then
+  begin
+    e_LogWriteln('GL: glGenFramebuffers failed');
+    Exit;
+  end;
+
   glGenTextures(1, @e_Frame);
   glBindTexture(GL_TEXTURE_2D, e_Frame);
   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, Width, Height, 0, GL_RGB, GL_UNSIGNED_BYTE, nil);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 
-  glGenRenderbuffers(1, @e_RBO);
-  glBindRenderbuffer(GL_RENDERBUFFER, e_RBO);
-  glRenderbufferStorage(GL_RENDERBUFFER, {$IFNDEF USE_GLES1}GL_DEPTH24_STENCIL8{$ELSE}GL_DEPTH_COMPONENT16{$ENDIF}, Width, Height);
+  if glGetError() <> GL_NO_ERROR then
+  begin
+    e_LogWriteln('GL: can''t create FBO color buffer');
+    DestroyFramebuffer;
+    Exit;
+  end;
 
   glBindFramebuffer(GL_FRAMEBUFFER, e_FBO);
   glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, e_Frame, 0);
-  glFramebufferRenderbuffer(GL_FRAMEBUFFER, {$IFNDEF USE_GLES1}GL_DEPTH_STENCIL_ATTACHMENT{$ELSE}GL_DEPTH_ATTACHMENT{$ENDIF}, GL_RENDERBUFFER, e_RBO);
+  if glCheckFramebufferStatus(GL_FRAMEBUFFER) <> GL_FRAMEBUFFER_COMPLETE then
+  begin
+    e_LogWriteln('GL: can''t construct framebuffer with color attachment');
+    DestroyFramebuffer;
+    Exit;
+  end;
+
+{$IFNDEF USE_GLES1}
+  if e_RBOSupported then
+  begin
+    glGenRenderbuffers(1, @e_RBO);
+    glBindRenderbuffer(GL_RENDERBUFFER, e_RBO);
+    glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, Width, Height);
+    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, e_RBO);
+    if glCheckFramebufferStatus(GL_FRAMEBUFFER) <> GL_FRAMEBUFFER_COMPLETE then
+    begin
+      e_LogWriteln('GL: can''t construct framebuffer with depth+stencil attachment, trying without');
+      e_RBOSupported := False;
+      Result := e_ResizeFramebuffer(Width, Height);
+      Exit;
+    end;
+  end;
+{$ENDIF}
+
+  Result := True;
 end;
 
 procedure e_ResizeWindow(Width, Height: Integer);
@@ -994,17 +1037,12 @@ begin
   else
     glDisable(GL_BLEND);
 
-  if Blending = TBlending.Blend then
-    glBlendFunc(GL_SRC_ALPHA, GL_ONE)
-  else
-    if Blending = TBlending.Filter then
-      glBlendFunc(GL_DST_COLOR, GL_SRC_COLOR)
-    else
-      if Blending = TBlending.Invert then
-        glBlendFunc(GL_ONE_MINUS_DST_COLOR, GL_ZERO)
-      else
-        if Alpha > 0 then
-          glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+  case Blending of
+    TBlending.None: if Alpha > 0 then glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+    TBlending.Blend: glBlendFunc(GL_SRC_ALPHA, GL_ONE);
+    TBlending.Invert: glBlendFunc(GL_ONE_MINUS_DST_COLOR, GL_ZERO);
+    TBlending.Filter: glBlendFunc(GL_ZERO, GL_SRC_COLOR);
+  end;
 
   glDisable(GL_TEXTURE_2D);
   glColor4ub(Red, Green, Blue, 255-Alpha);
@@ -1020,7 +1058,6 @@ begin
   glEnd();
 
   glColor4ub(e_Colors.R, e_Colors.G, e_Colors.B, 255);
-
   glDisable(GL_BLEND);
 end;