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support GL_ARB_framebuffer_object, with GL_EXT_framebuffer_object as fallback, use...
[xonotic/darkplaces.git] / gl_backend.c
diff --git a/gl_backend.c b/gl_backend.c
index bfc5c96810227a42fcfef5948e7cda8f49cb6dd1..c182ad3bb5c305e664b04bd8f00dfebe8d1cb555 100644 (file)
--- a/gl_backend.c
+++ b/gl_backend.c
@@ -1259,24 +1259,75 @@ int R_Mesh_CreateFramebufferObject(rtexture_t *depthtexture, rtexture_t *colorte
        case RENDERPATH_GL20:
        case RENDERPATH_GLES1:
        case RENDERPATH_GLES2:
-               if (vid.support.ext_framebuffer_object)
+               if (vid.support.arb_framebuffer_object)
+               {
+                       int temp;
+                       GLuint status;
+                       qglGenFramebuffers(1, (GLuint*)&temp);CHECKGLERROR
+                       R_Mesh_SetRenderTargets(temp, NULL, NULL, NULL, NULL, NULL);
+                       // GL_ARB_framebuffer_object (GL3-class hardware) - depth stencil attachment
+                       if (depthtexture  && depthtexture->texnum ) qglFramebufferTexture2D(GL_FRAMEBUFFER, depthtexture->glisdepthstencil ? GL_DEPTH_STENCIL_ATTACHMENT : GL_DEPTH_ATTACHMENT  , depthtexture->gltexturetypeenum , depthtexture->texnum , 0);CHECKGLERROR
+                       if (depthtexture  && depthtexture->renderbuffernum ) qglFramebufferRenderbuffer(GL_FRAMEBUFFER, depthtexture->glisdepthstencil ? GL_DEPTH_STENCIL_ATTACHMENT : GL_DEPTH_ATTACHMENT  , GL_RENDERBUFFER, depthtexture->renderbuffernum );CHECKGLERROR
+                       if (colortexture  && colortexture->texnum ) qglFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 , colortexture->gltexturetypeenum , colortexture->texnum , 0);CHECKGLERROR
+                       if (colortexture2 && colortexture2->texnum) qglFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1 , colortexture2->gltexturetypeenum, colortexture2->texnum, 0);CHECKGLERROR
+                       if (colortexture3 && colortexture3->texnum) qglFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2 , colortexture3->gltexturetypeenum, colortexture3->texnum, 0);CHECKGLERROR
+                       if (colortexture4 && colortexture4->texnum) qglFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT3 , colortexture4->gltexturetypeenum, colortexture4->texnum, 0);CHECKGLERROR
+                       if (colortexture  && colortexture->renderbuffernum ) qglFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 , GL_RENDERBUFFER, colortexture->renderbuffernum );CHECKGLERROR
+                       if (colortexture2 && colortexture2->renderbuffernum) qglFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1 , GL_RENDERBUFFER, colortexture2->renderbuffernum);CHECKGLERROR
+                       if (colortexture3 && colortexture3->renderbuffernum) qglFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2 , GL_RENDERBUFFER, colortexture3->renderbuffernum);CHECKGLERROR
+                       if (colortexture4 && colortexture4->renderbuffernum) qglFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT3 , GL_RENDERBUFFER, colortexture4->renderbuffernum);CHECKGLERROR
+
+                       if (colortexture4 && qglDrawBuffersARB)
+                       {
+                               qglDrawBuffersARB(4, drawbuffers);CHECKGLERROR
+                               qglReadBuffer(GL_NONE);CHECKGLERROR
+                       }
+                       else if (colortexture3 && qglDrawBuffersARB)
+                       {
+                               qglDrawBuffersARB(3, drawbuffers);CHECKGLERROR
+                               qglReadBuffer(GL_NONE);CHECKGLERROR
+                       }
+                       else if (colortexture2 && qglDrawBuffersARB)
+                       {
+                               qglDrawBuffersARB(2, drawbuffers);CHECKGLERROR
+                               qglReadBuffer(GL_NONE);CHECKGLERROR
+                       }
+                       else if (colortexture && qglDrawBuffer)
+                       {
+                               qglDrawBuffer(GL_COLOR_ATTACHMENT0);CHECKGLERROR
+                               qglReadBuffer(GL_COLOR_ATTACHMENT0);CHECKGLERROR
+                       }
+                       else if (qglDrawBuffer)
+                       {
+                               qglDrawBuffer(GL_NONE);CHECKGLERROR
+                               qglReadBuffer(GL_NONE);CHECKGLERROR
+                       }
+                       status = qglCheckFramebufferStatus(GL_FRAMEBUFFER);CHECKGLERROR
+                       if (status != GL_FRAMEBUFFER_COMPLETE)
+                       {
+                               Con_Printf("R_Mesh_CreateFramebufferObject: glCheckFramebufferStatus returned %i\n", status);
+                               qglDeleteFramebuffers(1, (GLuint*)&temp);
+                               temp = 0;
+                       }
+                       return temp;
+               }
+               else if (vid.support.ext_framebuffer_object)
                {
                        int temp;
                        GLuint status;
-                       qglGenFramebuffersEXT(1, (GLuint*)&temp);CHECKGLERROR
+                       qglGenFramebuffers(1, (GLuint*)&temp);CHECKGLERROR
                        R_Mesh_SetRenderTargets(temp, NULL, NULL, NULL, NULL, NULL);
-                       if (depthtexture  && depthtexture->texnum ) qglFramebufferTexture2DEXT(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT  , depthtexture->gltexturetypeenum , depthtexture->texnum , 0);CHECKGLERROR
-               //      if (depthtexture  && depthtexture->texnum ) qglFramebufferTexture2DEXT(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, depthtexture->gltexturetypeenum , depthtexture->texnum , 0);CHECKGLERROR
-                       if (colortexture  && colortexture->texnum ) qglFramebufferTexture2DEXT(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 , colortexture->gltexturetypeenum , colortexture->texnum , 0);CHECKGLERROR
-                       if (colortexture2 && colortexture2->texnum) qglFramebufferTexture2DEXT(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1 , colortexture2->gltexturetypeenum, colortexture2->texnum, 0);CHECKGLERROR
-                       if (colortexture3 && colortexture3->texnum) qglFramebufferTexture2DEXT(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2 , colortexture3->gltexturetypeenum, colortexture3->texnum, 0);CHECKGLERROR
-                       if (colortexture4 && colortexture4->texnum) qglFramebufferTexture2DEXT(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT3 , colortexture4->gltexturetypeenum, colortexture4->texnum, 0);CHECKGLERROR
-                       if (depthtexture  && depthtexture->renderbuffernum ) qglFramebufferRenderbufferEXT(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT  , GL_RENDERBUFFER, depthtexture->renderbuffernum );CHECKGLERROR
-                       if (depthtexture  && depthtexture->renderbuffernum ) qglFramebufferRenderbufferEXT(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, depthtexture->renderbuffernum );CHECKGLERROR
-                       if (colortexture  && colortexture->renderbuffernum ) qglFramebufferRenderbufferEXT(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 , GL_RENDERBUFFER, colortexture->renderbuffernum );CHECKGLERROR
-                       if (colortexture2 && colortexture2->renderbuffernum) qglFramebufferRenderbufferEXT(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1 , GL_RENDERBUFFER, colortexture2->renderbuffernum);CHECKGLERROR
-                       if (colortexture3 && colortexture3->renderbuffernum) qglFramebufferRenderbufferEXT(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2 , GL_RENDERBUFFER, colortexture3->renderbuffernum);CHECKGLERROR
-                       if (colortexture4 && colortexture4->renderbuffernum) qglFramebufferRenderbufferEXT(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT3 , GL_RENDERBUFFER, colortexture4->renderbuffernum);CHECKGLERROR
+                       // GL_EXT_framebuffer_object (GL2-class hardware) - no depth stencil attachment, let it break stencil
+                       if (depthtexture  && depthtexture->texnum ) qglFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT  , depthtexture->gltexturetypeenum , depthtexture->texnum , 0);CHECKGLERROR
+                       if (depthtexture  && depthtexture->renderbuffernum ) qglFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT  , GL_RENDERBUFFER, depthtexture->renderbuffernum );CHECKGLERROR
+                       if (colortexture  && colortexture->texnum ) qglFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 , colortexture->gltexturetypeenum , colortexture->texnum , 0);CHECKGLERROR
+                       if (colortexture2 && colortexture2->texnum) qglFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1 , colortexture2->gltexturetypeenum, colortexture2->texnum, 0);CHECKGLERROR
+                       if (colortexture3 && colortexture3->texnum) qglFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2 , colortexture3->gltexturetypeenum, colortexture3->texnum, 0);CHECKGLERROR
+                       if (colortexture4 && colortexture4->texnum) qglFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT3 , colortexture4->gltexturetypeenum, colortexture4->texnum, 0);CHECKGLERROR
+                       if (colortexture  && colortexture->renderbuffernum ) qglFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 , GL_RENDERBUFFER, colortexture->renderbuffernum );CHECKGLERROR
+                       if (colortexture2 && colortexture2->renderbuffernum) qglFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1 , GL_RENDERBUFFER, colortexture2->renderbuffernum);CHECKGLERROR
+                       if (colortexture3 && colortexture3->renderbuffernum) qglFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2 , GL_RENDERBUFFER, colortexture3->renderbuffernum);CHECKGLERROR
+                       if (colortexture4 && colortexture4->renderbuffernum) qglFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT3 , GL_RENDERBUFFER, colortexture4->renderbuffernum);CHECKGLERROR
 
                        if (colortexture4 && qglDrawBuffersARB)
                        {
@@ -1295,7 +1346,7 @@ int R_Mesh_CreateFramebufferObject(rtexture_t *depthtexture, rtexture_t *colorte
                        }
                        else if (colortexture && qglDrawBuffer)
                        {
-                               qglDrawBuffer(drawbuffers[0]);CHECKGLERROR
+                               qglDrawBuffer(GL_COLOR_ATTACHMENT0);CHECKGLERROR
                                qglReadBuffer(GL_COLOR_ATTACHMENT0);CHECKGLERROR
                        }
                        else if (qglDrawBuffer)
@@ -1303,11 +1354,11 @@ int R_Mesh_CreateFramebufferObject(rtexture_t *depthtexture, rtexture_t *colorte
                                qglDrawBuffer(GL_NONE);CHECKGLERROR
                                qglReadBuffer(GL_NONE);CHECKGLERROR
                        }
-                       status = qglCheckFramebufferStatusEXT(GL_FRAMEBUFFER);CHECKGLERROR
+                       status = qglCheckFramebufferStatus(GL_FRAMEBUFFER);CHECKGLERROR
                        if (status != GL_FRAMEBUFFER_COMPLETE)
                        {
-                               Con_Printf("R_Mesh_CreateFramebufferObject: glCheckFramebufferStatusEXT returned %i\n", status);
-                               qglDeleteFramebuffersEXT(1, (GLuint*)&temp);
+                               Con_Printf("R_Mesh_CreateFramebufferObject: glCheckFramebufferStatus returned %i\n", status);
+                               qglDeleteFramebuffers(1, (GLuint*)&temp);
                                temp = 0;
                        }
                        return temp;
@@ -1333,7 +1384,7 @@ void R_Mesh_DestroyFramebufferObject(int fbo)
        case RENDERPATH_GLES1:
        case RENDERPATH_GLES2:
                if (fbo)
-                       qglDeleteFramebuffersEXT(1, (GLuint*)&fbo);
+                       qglDeleteFramebuffers(1, (GLuint*)&fbo);
                break;
        case RENDERPATH_D3D9:
        case RENDERPATH_D3D10:
@@ -1400,7 +1451,7 @@ void R_Mesh_SetRenderTargets(int fbo, rtexture_t *depthtexture, rtexture_t *colo
                if (gl_state.framebufferobject != fbo)
                {
                        gl_state.framebufferobject = fbo;
-                       qglBindFramebufferEXT(GL_FRAMEBUFFER, gl_state.framebufferobject ? gl_state.framebufferobject : gl_state.defaultframebufferobject);
+                       qglBindFramebuffer(GL_FRAMEBUFFER, gl_state.framebufferobject ? gl_state.framebufferobject : gl_state.defaultframebufferobject);
                }
                break;
        case RENDERPATH_D3D9:
@@ -1558,8 +1609,8 @@ static void GL_Backend_ResetState(void)
 
                if (vid.support.ext_framebuffer_object)
                {
-                       //qglBindRenderbufferEXT(GL_RENDERBUFFER, 0);
-                       qglBindFramebufferEXT(GL_FRAMEBUFFER, 0);
+                       //qglBindRenderbuffer(GL_RENDERBUFFER, 0);
+                       qglBindFramebuffer(GL_FRAMEBUFFER, 0);
                }
 
                qglVertexPointer(3, GL_FLOAT, sizeof(float[3]), NULL);CHECKGLERROR
@@ -1570,7 +1621,7 @@ static void GL_Backend_ResetState(void)
                qglColor4f(1, 1, 1, 1);CHECKGLERROR
 
                if (vid.support.ext_framebuffer_object)
-                       qglBindFramebufferEXT(GL_FRAMEBUFFER, gl_state.framebufferobject);
+                       qglBindFramebuffer(GL_FRAMEBUFFER, gl_state.framebufferobject);
 
                gl_state.unit = MAX_TEXTUREUNITS;
                gl_state.clientunit = MAX_TEXTUREUNITS;
@@ -1629,7 +1680,7 @@ static void GL_Backend_ResetState(void)
                        qglBindBufferARB(GL_ELEMENT_ARRAY_BUFFER, 0);
                }
                if (vid.support.ext_framebuffer_object)
-                       qglBindFramebufferEXT(GL_FRAMEBUFFER, gl_state.defaultframebufferobject);
+                       qglBindFramebuffer(GL_FRAMEBUFFER, gl_state.defaultframebufferobject);
                qglEnableVertexAttribArray(GLSLATTRIB_POSITION);
                qglVertexAttribPointer(GLSLATTRIB_POSITION, 3, GL_FLOAT, false, sizeof(float[3]), NULL);CHECKGLERROR
                qglDisableVertexAttribArray(GLSLATTRIB_COLOR);