BlendMode.Filter is now a proper filter

[d2df-sdl.git] / src / engine / e_graphics.pas

diff --git a/src/engine/e_graphics.pas b/src/engine/e_graphics.pas
index 5b117f0433010d0a438ab68d0db3104282711971..de31fa50ea46797507f03521c0fe58429658926a 100644 (file)
--- a/src/engine/e_graphics.pas
+++ b/src/engine/e_graphics.pas
@@ -199,13 +199,11 @@ var
   e_TextureFonts: array of TTextureFont = nil;
   e_CharFonts: array of TCharFont;
   //e_SavedTextures: array of TSavedTexture;
-{$IFNDEF HEADLESS}
   e_FBO: GLuint = 0;
   e_RBO: GLuint = 0;
   e_Frame: GLuint = 0;
   e_FrameW: Integer = -1;
   e_FrameH: Integer = -1;
-{$ENDIF}
 
 //function e_getTextGLId (ID: DWORD): GLuint; begin result := e_Textures[ID].tx.id; end;
 
@@ -383,7 +381,6 @@ end;
 
 procedure e_ResizeFramebuffer(Width, Height: Integer);
 begin
-{$IFNDEF HEADLESS}
   if e_NoGraphics then Exit;
 
   glBindTexture(GL_TEXTURE_2D, 0);
@@ -421,12 +418,11 @@ begin
 
   glGenRenderbuffers(1, @e_RBO);
   glBindRenderbuffer(GL_RENDERBUFFER, e_RBO);
-  glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, Width, Height);
+  glRenderbufferStorage(GL_RENDERBUFFER, {$IFNDEF USE_GLES1}GL_DEPTH24_STENCIL8{$ELSE}GL_DEPTH_COMPONENT16{$ENDIF}, Width, Height);
 
   glBindFramebuffer(GL_FRAMEBUFFER, e_FBO);
   glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, e_Frame, 0);
-  glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, e_RBO);
-{$ENDIF}
+  glFramebufferRenderbuffer(GL_FRAMEBUFFER, {$IFNDEF USE_GLES1}GL_DEPTH_STENCIL_ATTACHMENT{$ELSE}GL_DEPTH_ATTACHMENT{$ENDIF}, GL_RENDERBUFFER, e_RBO);
 end;
 
 procedure e_ResizeWindow(Width, Height: Integer);
@@ -445,12 +441,6 @@ begin
   y1 := y0+h;
        if Mirror = TMirrorType.Horizontal then begin tmp := x1; x1 := x0; x0 := tmp; end
   else if Mirror = TMirrorType.Vertical then begin tmp := y1; y1 := y0; y0 := tmp; end;
-  //HACK: make texture one pixel shorter, so it won't wrap
-  if (g_dbg_scale <> 1.0) then
-  begin
-    u := u*tw/(tw+1);
-    v := v*th/(th+1);
-  end;
   glTexCoord2f(0, v); glVertex2i(x0, y0);
   glTexCoord2f(0, 0); glVertex2i(x0, y1);
   glTexCoord2f(u, 0); glVertex2i(x1, y1);
@@ -459,20 +449,24 @@ end;
 
 procedure e_BlitFramebuffer(WinWidth, WinHeight: Integer);
 begin
-{$IFNDEF HEADLESS}
   if (e_FBO = 0) or (e_Frame = 0) or e_NoGraphics then exit;
+
   glDisable(GL_BLEND);
   glEnable(GL_TEXTURE_2D);
   glBindFramebuffer(GL_FRAMEBUFFER, 0);
   glBindTexture(GL_TEXTURE_2D, e_Frame);
-  glColor4ub(255, 255, 255, 255);
   e_SetViewPort(0, 0, WinWidth, WinHeight);
+  glColor4ub(255, 255, 255, 255);
+
   glBegin(GL_QUADS);
-  drawTxQuad(0, 0, WinWidth, WinHeight, e_FrameW, e_FrameH, 1, 1, TMirrorType.None);
+    glTexCoord2f(0, 1); glVertex2i(       0,         0);
+    glTexCoord2f(0, 0); glVertex2i(       0, WinHeight);
+    glTexCoord2f(1, 0); glVertex2i(WinWidth, WinHeight);
+    glTexCoord2f(1, 1); glVertex2i(WinWidth,         0);
   glEnd();
+
   glBindFramebuffer(GL_FRAMEBUFFER, e_FBO);
   e_SetViewPort(0, 0, e_FrameW, e_FrameH);
-{$ENDIF}
 end;
 
 procedure e_Draw(ID: DWORD; X, Y: Integer; Alpha: Byte; AlphaChannel: Boolean;
@@ -1000,17 +994,12 @@ 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);
@@ -1026,7 +1015,6 @@ begin
   glEnd();
 
   glColor4ub(e_Colors.R, e_Colors.G, e_Colors.B, 255);
-
   glDisable(GL_BLEND);
 end;