| 0,0 → 1,103 |
|---|
| |
| #include "main/context.h" |
| #include "main/colormac.h" |
| #include "main/fbobject.h" |
| #include "main/macros.h" |
| #include "main/teximage.h" |
| #include "main/renderbuffer.h" |
| #include "swrast/swrast.h" |
| #include "swrast/s_context.h" |
| #include "swrast/s_texfetch.h" |
| |
| |
| /* |
| * Render-to-texture code for GL_EXT_framebuffer_object |
| */ |
| |
| |
| static void |
| delete_texture_wrapper(struct gl_context *ctx, struct gl_renderbuffer *rb) |
| { |
| ASSERT(rb->RefCount == 0); |
| free(rb); |
| } |
| |
| /** |
| * Update the renderbuffer wrapper for rendering to a texture. |
| * For example, update the width, height of the RB based on the texture size, |
| * update the internal format info, etc. |
| */ |
| static void |
| update_wrapper(struct gl_context *ctx, struct gl_renderbuffer_attachment *att) |
| { |
| struct gl_renderbuffer *rb = att->Renderbuffer; |
| struct swrast_renderbuffer *srb = swrast_renderbuffer(rb); |
| struct swrast_texture_image *swImage; |
| gl_format format; |
| GLuint zOffset; |
| |
| (void) ctx; |
| |
| swImage = swrast_texture_image(rb->TexImage); |
| assert(swImage); |
| |
| format = swImage->Base.TexFormat; |
| |
| if (att->Texture->Target == GL_TEXTURE_1D_ARRAY_EXT) { |
| zOffset = 0; |
| } |
| else { |
| zOffset = att->Zoffset; |
| } |
| |
| /* Want to store linear values, not sRGB */ |
| rb->Format = _mesa_get_srgb_format_linear(format); |
| |
| srb->Buffer = swImage->ImageSlices[zOffset]; |
| } |
| |
| |
| |
| /** |
| * Called when rendering to a texture image begins, or when changing |
| * the dest mipmap level, cube face, etc. |
| * This is a fallback routine for software render-to-texture. |
| * |
| * Called via the glRenderbufferTexture1D/2D/3D() functions |
| * and elsewhere (such as glTexImage2D). |
| * |
| * The image we're rendering into is |
| * att->Texture->Image[att->CubeMapFace][att->TextureLevel]; |
| * It'll never be NULL. |
| * |
| * \param fb the framebuffer object the texture is being bound to |
| * \param att the fb attachment point of the texture |
| * |
| * \sa _mesa_framebuffer_renderbuffer |
| */ |
| void |
| _swrast_render_texture(struct gl_context *ctx, |
| struct gl_framebuffer *fb, |
| struct gl_renderbuffer_attachment *att) |
| { |
| struct gl_renderbuffer *rb = att->Renderbuffer; |
| (void) fb; |
| |
| /* plug in our texture_renderbuffer-specific functions */ |
| rb->Delete = delete_texture_wrapper; |
| |
| update_wrapper(ctx, att); |
| } |
| |
| |
| void |
| _swrast_finish_render_texture(struct gl_context *ctx, |
| struct gl_renderbuffer *rb) |
| { |
| /* do nothing */ |
| /* The renderbuffer texture wrapper will get deleted by the |
| * normal mechanism for deleting renderbuffers. |
| */ |
| (void) ctx; |
| (void) rb; |
| } |