2 #include "main/context.h"
3 #include "main/fbobject.h"
4 #include "main/macros.h"
5 #include "main/teximage.h"
6 #include "main/renderbuffer.h"
7 #include "swrast/swrast.h"
8 #include "swrast/s_context.h"
9 #include "swrast/s_texfetch.h"
13 * Render-to-texture code for GL_EXT_framebuffer_object
18 delete_texture_wrapper(struct gl_context
*ctx
, struct gl_renderbuffer
*rb
)
20 assert(rb
->RefCount
== 0);
25 * Update the renderbuffer wrapper for rendering to a texture.
26 * For example, update the width, height of the RB based on the texture size,
27 * update the internal format info, etc.
30 update_wrapper(struct gl_context
*ctx
, struct gl_renderbuffer_attachment
*att
)
32 struct gl_renderbuffer
*rb
= att
->Renderbuffer
;
33 struct swrast_renderbuffer
*srb
= swrast_renderbuffer(rb
);
34 struct swrast_texture_image
*swImage
;
40 swImage
= swrast_texture_image(rb
->TexImage
);
43 format
= swImage
->Base
.TexFormat
;
45 if (att
->Texture
->Target
== GL_TEXTURE_1D_ARRAY_EXT
) {
49 zOffset
= att
->Zoffset
;
52 /* Want to store linear values, not sRGB */
53 rb
->Format
= _mesa_get_srgb_format_linear(format
);
55 srb
->Buffer
= swImage
->ImageSlices
[zOffset
];
61 * Called when rendering to a texture image begins, or when changing
62 * the dest mipmap level, cube face, etc.
63 * This is a fallback routine for software render-to-texture.
65 * Called via the glRenderbufferTexture1D/2D/3D() functions
66 * and elsewhere (such as glTexImage2D).
68 * The image we're rendering into is
69 * att->Texture->Image[att->CubeMapFace][att->TextureLevel];
70 * It'll never be NULL.
72 * \param fb the framebuffer object the texture is being bound to
73 * \param att the fb attachment point of the texture
75 * \sa _mesa_FramebufferRenderbuffer_sw
78 _swrast_render_texture(struct gl_context
*ctx
,
79 struct gl_framebuffer
*fb
,
80 struct gl_renderbuffer_attachment
*att
)
82 struct gl_renderbuffer
*rb
= att
->Renderbuffer
;
85 /* plug in our texture_renderbuffer-specific functions */
86 rb
->Delete
= delete_texture_wrapper
;
88 update_wrapper(ctx
, att
);
93 _swrast_finish_render_texture(struct gl_context
*ctx
,
94 struct gl_renderbuffer
*rb
)
97 /* The renderbuffer texture wrapper will get deleted by the
98 * normal mechanism for deleting renderbuffers.