From: DeaDDooMER <deaddoomer@deadsoftware.ru>
Date: Tue, 14 Feb 2023 12:03:37 +0000 (+0300)
Subject: nogl: use native glOrthof when possible
X-Git-Url: http://deadsoftware.ru/gitweb?a=commitdiff_plain;h=ebd974ffe03b41f787eb8421cf0985f55688b606;p=d2df-sdl.git

nogl: use native glOrthof when possible
---

diff --git a/src/nogl/noGLES1.inc b/src/nogl/noGLES1.inc
index 6bc0acb..15765bf 100644
--- a/src/nogl/noGLES1.inc
+++ b/src/nogl/noGLES1.inc
@@ -58,7 +58,7 @@ implementation
     es_glFinish: procedure; cdecl;
 
     es_glMultMatrixf: procedure (m: PGLfloat); cdecl;
-    //es_glOrthof: procedure (left, right, bottom, top, near, far: GLfloat); cdecl;
+    es_glOrthof: procedure (left, right, bottom, top, near, far: GLfloat); cdecl;
     es_glLoadIdentity: procedure; cdecl;
     es_glMatrixMode: procedure (mode: GLenum); cdecl;
     es_glLoadMatrixf: procedure (m: PGLfloat); cdecl;
@@ -301,24 +301,30 @@ implementation
   procedure glOrtho (left, right, bottom, top, near, far: GLdouble);
     var m: array [0..15] of GLfloat;
   begin
-    {es_glOrthof(left, right, bottom, top, near, far);}
-    m[0] := 2 / (right - left);
-    m[1] := 0;
-    m[2] := 0;
-    m[3] := 0;
-    m[4] := 0;
-    m[5] := 2 / (top - bottom);
-    m[6] := 0;
-    m[7] := 0;
-    m[8] := 0;
-    m[9] := 0;
-    m[10] := -2 / (far - near);
-    m[11] := 0;
-    m[12] := -((right + left) / (right - left));
-    m[13] := -((top + bottom) / (top - bottom));
-    m[14] := -((far + near) / (far - near));
-    m[15] := 1;
-    es_glMultMatrixf(@m[0]);
+    if assigned(es_glOrthof) then
+    begin
+      es_glOrthof(left, right, bottom, top, near, far);
+    end
+    else
+    begin
+      m[0] := 2 / (right - left);
+      m[1] := 0;
+      m[2] := 0;
+      m[3] := 0;
+      m[4] := 0;
+      m[5] := 2 / (top - bottom);
+      m[6] := 0;
+      m[7] := 0;
+      m[8] := 0;
+      m[9] := 0;
+      m[10] := -2 / (far - near);
+      m[11] := 0;
+      m[12] := -((right + left) / (right - left));
+      m[13] := -((top + bottom) / (top - bottom));
+      m[14] := -((far + near) / (far - near));
+      m[15] := 1;
+      es_glMultMatrixf(@m[0]);
+    end;
   end;
 
   procedure glLoadIdentity;
@@ -534,7 +540,7 @@ implementation
     es_glFinish := SDL_GL_GetProcAddress('glFinish');
 
     es_glMultMatrixf := SDL_GL_GetProcAddress('glMultMatrixf');
-    //es_glOrthof := SDL_GL_GetProcAddress('glOrthof');
+    es_glOrthof := SDL_GL_GetProcAddress('glOrthof');
     es_glLoadIdentity := SDL_GL_GetProcAddress('glLoadIdentity');
     es_glMatrixMode := SDL_GL_GetProcAddress('glMatrixMode');
     es_glLoadMatrixf := SDL_GL_GetProcAddress('glLoadMatrixf');
@@ -604,7 +610,7 @@ implementation
     es_glFinish := nil;
 
     es_glMultMatrixf := nil;
-    //es_glOrthof := nil;
+    es_glOrthof := nil;
     es_glLoadIdentity := nil;
     es_glMatrixMode := nil;
     es_glLoadMatrixf := nil;