X-Git-Url: https://deadsoftware.ru/gitweb?a=blobdiff_plain;f=src%2Fengine%2Fe_graphics.pas;h=5edceb2c5f9d3c754a4d2f2f8e969fcd46410849;hb=c7a5223f1e2520ab13b480b937af1e208201de15;hp=de31fa50ea46797507f03521c0fe58429658926a;hpb=000d1214c24dfa432e38c30b9c1758ca27913cc3;p=d2df-sdl.git

diff --git a/src/engine/e_graphics.pas b/src/engine/e_graphics.pas
index de31fa5..5edceb2 100644
--- a/src/engine/e_graphics.pas
+++ b/src/engine/e_graphics.pas
@@ -62,8 +62,9 @@ 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_SetRenderTarget(Framebuffer: Boolean);
 
 procedure e_Draw(ID: DWORD; X, Y: Integer; Alpha: Byte; AlphaChannel: Boolean;
                  Blending: Boolean; Mirror: TMirrorType = TMirrorType.None);
@@ -201,6 +202,7 @@ 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 +381,8 @@ 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 +404,69 @@ 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);
@@ -447,15 +491,22 @@ begin
   glTexCoord2f(u, v); glVertex2i(x1, y0);
 end;
 
+procedure e_SetRenderTarget(Framebuffer: Boolean);
+begin
+  if (e_FBO = 0) or e_NoGraphics then exit;
+  if Framebuffer then
+    glBindFramebuffer(GL_FRAMEBUFFER, e_FBO)
+  else
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+end;
+
 procedure e_BlitFramebuffer(WinWidth, WinHeight: Integer);
 begin
   if (e_FBO = 0) or (e_Frame = 0) or e_NoGraphics then exit;
 
   glDisable(GL_BLEND);
   glEnable(GL_TEXTURE_2D);
-  glBindFramebuffer(GL_FRAMEBUFFER, 0);
   glBindTexture(GL_TEXTURE_2D, e_Frame);
-  e_SetViewPort(0, 0, WinWidth, WinHeight);
   glColor4ub(255, 255, 255, 255);
 
   glBegin(GL_QUADS);
@@ -464,9 +515,6 @@ begin
     glTexCoord2f(1, 0); glVertex2i(WinWidth, WinHeight);
     glTexCoord2f(1, 1); glVertex2i(WinWidth,         0);
   glEnd();
-
-  glBindFramebuffer(GL_FRAMEBUFFER, e_FBO);
-  e_SetViewPort(0, 0, e_FrameW, e_FrameH);
 end;
 
 procedure e_Draw(ID: DWORD; X, Y: Integer; Alpha: Byte; AlphaChannel: Boolean;