added detection of GL_EXT_framebuffer_object extension

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@9186 d7cf8633-e32d-0410-b094-e92efae38249

diff --git a/gl_backend.c b/gl_backend.c
index c0907b3663fa36749d8a9b25d9122106221d5d40..9647420f81f409b07da9f198228fb3dca79ca86a 100644 (file)
--- a/gl_backend.c
+++ b/gl_backend.c
@@ -16,6 +16,7 @@ cvar_t gl_dither = {CVAR_SAVE, "gl_dither", "1", "enables OpenGL dithering (16bi
 cvar_t gl_lockarrays = {0, "gl_lockarrays", "0", "enables use of glLockArraysEXT, may cause glitches with some broken drivers, and may be slower than normal"};
 cvar_t gl_lockarrays_minimumvertices = {0, "gl_lockarrays_minimumvertices", "1", "minimum number of vertices required for use of glLockArraysEXT, setting this too low may reduce performance"};
 cvar_t gl_vbo = {CVAR_SAVE, "gl_vbo", "3", "make use of GL_ARB_vertex_buffer_object extension to store static geometry in video memory for faster rendering, 0 disables VBO allocation or use, 1 enables VBOs for vertex and triangle data, 2 only for vertex data, 3 for vertex data and triangle data of simple meshes (ones with only one surface)"};
+cvar_t gl_fbo = {CVAR_SAVE, "gl_fbo", "1", "make use of GL_ARB_framebuffer_object extension to enable shadowmaps and other features using pixel formats different from the framebuffer"};
 
 cvar_t v_flipped = {0, "v_flipped", "0", "mirror the screen (poor man's left handed mode)"};
 qboolean v_flipped_state = false;
@@ -696,6 +697,12 @@ void GL_Backend_ResetState(void)
                qglBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
        }
 
+       if (gl_support_ext_framebuffer_object)
+       {
+               qglBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
+               qglBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+       }
+
        qglVertexPointer(3, GL_FLOAT, sizeof(float[3]), NULL);CHECKGLERROR
        qglEnableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
 

diff --git a/gl_rmain.c b/gl_rmain.c
index 9a22c99951389b5f46ca050c0dd84770bb21ba6d..23351c76dec8d1b057404ee4a0ac3b85b66ce641 100644 (file)
--- a/gl_rmain.c
+++ b/gl_rmain.c
@@ -3717,7 +3717,7 @@ void R_HDR_RenderBloomTexture(void)
 
        // TODO: support GL_EXT_framebuffer_object rather than reusing the framebuffer?  it might improve SLI performance.
        // TODO: add exposure compensation features
-       // TODO: add fp16 framebuffer support
+       // TODO: add fp16 framebuffer support (using GL_EXT_framebuffer_object)
 
        r_refdef.view.showdebug = false;
        r_refdef.view.colorscale *= r_bloom_colorscale.value / bound(1, r_hdr_range.value, 16);

diff --git a/glquake.h b/glquake.h
index 4ff40cd3f91790f21320c57c70ac0e1aaf59ba35..b1fae14771c2b26d47faf7c70fb66e75529c4979 100644 (file)
--- a/glquake.h
+++ b/glquake.h
@@ -491,6 +491,79 @@ extern GLboolean (GLAPIENTRY *qglUnmapBufferARB) (GLenum target);
 extern void (GLAPIENTRY *qglBufferDataARB) (GLenum target, GLsizeiptrARB size, const GLvoid *data, GLenum usage);
 extern void (GLAPIENTRY *qglBufferSubDataARB) (GLenum target, GLintptrARB offset, GLsizeiptrARB size, const GLvoid *data);
 
+//GL_EXT_framebuffer_object
+extern int gl_support_ext_framebuffer_object;
+#ifndef GL_FRAMEBUFFER_EXT
+#define GL_FRAMEBUFFER_EXT                                   0x8D40
+#define GL_RENDERBUFFER_EXT                                  0x8D41
+#define GL_STENCIL_INDEX1_EXT                                0x8D46
+#define GL_STENCIL_INDEX4_EXT                                0x8D47
+#define GL_STENCIL_INDEX8_EXT                                0x8D48
+#define GL_STENCIL_INDEX16_EXT                               0x8D49
+#define GL_RENDERBUFFER_WIDTH_EXT                            0x8D42
+#define GL_RENDERBUFFER_HEIGHT_EXT                           0x8D43
+#define GL_RENDERBUFFER_INTERNAL_FORMAT_EXT                  0x8D44
+#define GL_RENDERBUFFER_RED_SIZE_EXT                         0x8D50
+#define GL_RENDERBUFFER_GREEN_SIZE_EXT                       0x8D51
+#define GL_RENDERBUFFER_BLUE_SIZE_EXT                        0x8D52
+#define GL_RENDERBUFFER_ALPHA_SIZE_EXT                       0x8D53
+#define GL_RENDERBUFFER_DEPTH_SIZE_EXT                       0x8D54
+#define GL_RENDERBUFFER_STENCIL_SIZE_EXT                     0x8D55
+#define GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT            0x8CD0
+#define GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT            0x8CD1
+#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_EXT          0x8CD2
+#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_EXT  0x8CD3
+#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_3D_ZOFFSET_EXT     0x8CD4
+#define GL_COLOR_ATTACHMENT0_EXT                             0x8CE0
+#define GL_COLOR_ATTACHMENT1_EXT                             0x8CE1
+#define GL_COLOR_ATTACHMENT2_EXT                             0x8CE2
+#define GL_COLOR_ATTACHMENT3_EXT                             0x8CE3
+#define GL_COLOR_ATTACHMENT4_EXT                             0x8CE4
+#define GL_COLOR_ATTACHMENT5_EXT                             0x8CE5
+#define GL_COLOR_ATTACHMENT6_EXT                             0x8CE6
+#define GL_COLOR_ATTACHMENT7_EXT                             0x8CE7
+#define GL_COLOR_ATTACHMENT8_EXT                             0x8CE8
+#define GL_COLOR_ATTACHMENT9_EXT                             0x8CE9
+#define GL_COLOR_ATTACHMENT10_EXT                            0x8CEA
+#define GL_COLOR_ATTACHMENT11_EXT                            0x8CEB
+#define GL_COLOR_ATTACHMENT12_EXT                            0x8CEC
+#define GL_COLOR_ATTACHMENT13_EXT                            0x8CED
+#define GL_COLOR_ATTACHMENT14_EXT                            0x8CEE
+#define GL_COLOR_ATTACHMENT15_EXT                            0x8CEF
+#define GL_DEPTH_ATTACHMENT_EXT                              0x8D00
+#define GL_STENCIL_ATTACHMENT_EXT                            0x8D20
+#define GL_FRAMEBUFFER_COMPLETE_EXT                          0x8CD5
+#define GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT             0x8CD6
+#define GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT     0x8CD7
+#define GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT             0x8CD9
+#define GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT                0x8CDA
+#define GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT            0x8CDB
+#define GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT            0x8CDC
+#define GL_FRAMEBUFFER_UNSUPPORTED_EXT                       0x8CDD
+#define GL_FRAMEBUFFER_BINDING_EXT                           0x8CA6
+#define GL_RENDERBUFFER_BINDING_EXT                          0x8CA7
+#define GL_MAX_COLOR_ATTACHMENTS_EXT                         0x8CDF
+#define GL_MAX_RENDERBUFFER_SIZE_EXT                         0x84E8
+#define GL_INVALID_FRAMEBUFFER_OPERATION_EXT                 0x0506
+#endif
+extern GLboolean (GLAPIENTRY *qglIsRenderbufferEXT)(GLuint renderbuffer);
+extern void (GLAPIENTRY *qglBindRenderbufferEXT)(GLenum target, GLuint renderbuffer);
+extern void (GLAPIENTRY *qglDeleteRenderbuffersEXT)(GLsizei n, const GLuint *renderbuffers);
+extern void (GLAPIENTRY *qglGenRenderbuffersEXT)(GLsizei n, GLuint *renderbuffers);
+extern void (GLAPIENTRY *qglRenderbufferStorageEXT)(GLenum target, GLenum internalformat, GLsizei width, GLsizei height);
+extern void (GLAPIENTRY *qglGetRenderbufferParameterivEXT)(GLenum target, GLenum pname, GLint *params);
+extern GLboolean (GLAPIENTRY *qglIsFramebufferEXT)(GLuint framebuffer);
+extern void (GLAPIENTRY *qglBindFramebufferEXT)(GLenum target, GLuint framebuffer);
+extern void (GLAPIENTRY *qglDeleteFramebuffersEXT)(GLsizei n, const GLuint *framebuffers);
+extern void (GLAPIENTRY *qglGenFramebuffersEXT)(GLsizei n, GLuint *framebuffers);
+extern GLenum (GLAPIENTRY *qglCheckFramebufferStatusEXT)(GLenum target);
+extern void (GLAPIENTRY *qglFramebufferTexture1DEXT)(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
+extern void (GLAPIENTRY *qglFramebufferTexture2DEXT)(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
+extern void (GLAPIENTRY *qglFramebufferTexture3DEXT)(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level, GLint zoffset);
+extern void (GLAPIENTRY *qglFramebufferRenderbufferEXT)(GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
+extern void (GLAPIENTRY *qglGetFramebufferAttachmentParameterivEXT)(GLenum target, GLenum attachment, GLenum pname, GLint *params);
+extern void (GLAPIENTRY *qglGenerateMipmapEXT)(GLenum target);
+
 extern void (GLAPIENTRY *qglScissor)(GLint x, GLint y, GLsizei width, GLsizei height);
 
 extern void (GLAPIENTRY *qglClearColor)(GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);

diff --git a/vid_shared.c b/vid_shared.c
index ce164b4d48b511a32b5ee82cf387624f32f6e7c9..7376fee86b6a83965ae87e5efa3ded647bbb97d0 100644 (file)
--- a/vid_shared.c
+++ b/vid_shared.c
@@ -61,6 +61,8 @@ int gl_support_vertex_shader = false;
 int gl_support_fragment_shader = false;
 //GL_ARB_vertex_buffer_object
 int gl_support_arb_vertex_buffer_object = false;
+//GL_EXT_framebuffer_object
+int gl_support_ext_framebuffer_object = false;
 //GL_ARB_texture_compression
 int gl_support_texture_compression = false;
 //GL_ARB_occlusion_query
@@ -376,6 +378,25 @@ GLboolean (GLAPIENTRY *qglUnmapBufferARB) (GLenum target);
 void (GLAPIENTRY *qglBufferDataARB) (GLenum target, GLsizeiptrARB size, const GLvoid *data, GLenum usage);
 void (GLAPIENTRY *qglBufferSubDataARB) (GLenum target, GLintptrARB offset, GLsizeiptrARB size, const GLvoid *data);
 
+//GL_EXT_framebuffer_object
+GLboolean (GLAPIENTRY *qglIsRenderbufferEXT)(GLuint renderbuffer);
+void (GLAPIENTRY *qglBindRenderbufferEXT)(GLenum target, GLuint renderbuffer);
+void (GLAPIENTRY *qglDeleteRenderbuffersEXT)(GLsizei n, const GLuint *renderbuffers);
+void (GLAPIENTRY *qglGenRenderbuffersEXT)(GLsizei n, GLuint *renderbuffers);
+void (GLAPIENTRY *qglRenderbufferStorageEXT)(GLenum target, GLenum internalformat, GLsizei width, GLsizei height);
+void (GLAPIENTRY *qglGetRenderbufferParameterivEXT)(GLenum target, GLenum pname, GLint *params);
+GLboolean (GLAPIENTRY *qglIsFramebufferEXT)(GLuint framebuffer);
+void (GLAPIENTRY *qglBindFramebufferEXT)(GLenum target, GLuint framebuffer);
+void (GLAPIENTRY *qglDeleteFramebuffersEXT)(GLsizei n, const GLuint *framebuffers);
+void (GLAPIENTRY *qglGenFramebuffersEXT)(GLsizei n, GLuint *framebuffers);
+GLenum (GLAPIENTRY *qglCheckFramebufferStatusEXT)(GLenum target);
+void (GLAPIENTRY *qglFramebufferTexture1DEXT)(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
+void (GLAPIENTRY *qglFramebufferTexture2DEXT)(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
+void (GLAPIENTRY *qglFramebufferTexture3DEXT)(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level, GLint zoffset);
+void (GLAPIENTRY *qglFramebufferRenderbufferEXT)(GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
+void (GLAPIENTRY *qglGetFramebufferAttachmentParameterivEXT)(GLenum target, GLenum attachment, GLenum pname, GLint *params);
+void (GLAPIENTRY *qglGenerateMipmapEXT)(GLenum target);
+
 void (GLAPIENTRY *qglCompressedTexImage3DARB)(GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLsizei imageSize, const void *data);
 void (GLAPIENTRY *qglCompressedTexImage2DARB)(GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border,  GLsizei imageSize, const void *data);
 void (GLAPIENTRY *qglCompressedTexImage1DARB)(GLenum target, GLint level, GLenum internalformat, GLsizei width, GLint border, GLsizei imageSize, const void *data);
@@ -741,6 +762,28 @@ static dllfunction_t vbofuncs[] =
        {NULL, NULL}
 };
 
+static dllfunction_t fbofuncs[] =
+{
+       {"glIsRenderbufferEXT"                      , (void **) &qglIsRenderbufferEXT},
+       {"glBindRenderbufferEXT"                    , (void **) &qglBindRenderbufferEXT},
+       {"glDeleteRenderbuffersEXT"                 , (void **) &qglDeleteRenderbuffersEXT},
+       {"glGenRenderbuffersEXT"                    , (void **) &qglGenRenderbuffersEXT},
+       {"glRenderbufferStorageEXT"                 , (void **) &qglRenderbufferStorageEXT},
+       {"glGetRenderbufferParameterivEXT"          , (void **) &qglGetRenderbufferParameterivEXT},
+       {"glIsFramebufferEXT"                       , (void **) &qglIsFramebufferEXT},
+       {"glBindFramebufferEXT"                     , (void **) &qglBindFramebufferEXT},
+       {"glDeleteFramebuffersEXT"                  , (void **) &qglDeleteFramebuffersEXT},
+       {"glGenFramebuffersEXT"                     , (void **) &qglGenFramebuffersEXT},
+       {"glCheckFramebufferStatusEXT"              , (void **) &qglCheckFramebufferStatusEXT},
+       {"glFramebufferTexture1DEXT"                , (void **) &qglFramebufferTexture1DEXT},
+       {"glFramebufferTexture2DEXT"                , (void **) &qglFramebufferTexture2DEXT},
+       {"glFramebufferTexture3DEXT"                , (void **) &qglFramebufferTexture3DEXT},
+       {"glFramebufferRenderbufferEXT"             , (void **) &qglFramebufferRenderbufferEXT},
+       {"glGetFramebufferAttachmentParameterivEXT" , (void **) &qglGetFramebufferAttachmentParameterivEXT},
+       {"glGenerateMipmapEXT"                      , (void **) &qglGenerateMipmapEXT},
+       {NULL, NULL}
+};
+
 static dllfunction_t texturecompressionfuncs[] =
 {
        {"glCompressedTexImage3DARB",    (void **) &qglCompressedTexImage3DARB},
@@ -794,6 +837,7 @@ void VID_CheckExtensions(void)
        gl_support_vertex_shader = false;
        gl_support_fragment_shader = false;
        gl_support_arb_vertex_buffer_object = false;
+       gl_support_ext_framebuffer_object = false;
        gl_support_texture_compression = false;
        gl_support_arb_occlusion_query = false;
 
@@ -856,6 +900,9 @@ void VID_CheckExtensions(void)
 // COMMANDLINEOPTION: GL: -novbo disables GL_ARB_vertex_buffer_object (which accelerates rendering)
        gl_support_arb_vertex_buffer_object = GL_CheckExtension("GL_ARB_vertex_buffer_object", vbofuncs, "-novbo", false);
 
+// COMMANDLINEOPTION: GL: -nofbo disables GL_EXT_framebuffer_object (which accelerates rendering)
+       gl_support_ext_framebuffer_object = GL_CheckExtension("GL_EXT_framebuffer_object", fbofuncs, "-nofbo", false);
+
        // we don't care if it's an extension or not, they are identical functions, so keep it simple in the rendering code
        if (qglDrawRangeElements == NULL)
                qglDrawRangeElements = qglDrawRangeElementsEXT;