[Mesa-dev] [PATCH 4/4] mesa: add OES_texture_buffer and EXT_texture_buffer support

Ilia Mirkin imirkin at alum.mit.edu
Sat Feb 27 21:39:43 UTC 2016


On Sat, Feb 27, 2016 at 4:30 PM, Ilia Mirkin <imirkin at alum.mit.edu> wrote:
> Allow ES 3.1 contexts to access the texture buffer functionality.
>
> Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
> ---
>  docs/GL3.txt                            |  2 +-
>  src/mapi/glapi/gen/apiexec.py           |  4 ++--
>  src/mapi/glapi/gen/es_EXT.xml           | 36 ++++++++++++++++++++++++++++++
>  src/mesa/main/bufferobj.c               |  4 ++--
>  src/mesa/main/get.c                     |  4 ++--
>  src/mesa/main/get_hash_params.py        | 20 ++++++++---------
>  src/mesa/main/tests/dispatch_sanity.cpp |  4 ++++
>  src/mesa/main/teximage.c                | 20 +++++++++++------
>  src/mesa/main/texobj.c                  |  8 +++----
>  src/mesa/main/texparam.c                | 39 +++++++++++++++++----------------
>  10 files changed, 94 insertions(+), 47 deletions(-)
>
> diff --git a/docs/GL3.txt b/docs/GL3.txt
> index b9d9713..2f81cba 100644
> --- a/docs/GL3.txt
> +++ b/docs/GL3.txt
> @@ -254,7 +254,7 @@ GLES3.2, GLSL ES 3.2
>    GL_OES_shader_multisample_interpolation              DONE (nvc0, r600, radeonsi)
>    GL_OES_tessellation_shader                           not started (based on GL_ARB_tessellation_shader, which is done for some drivers)
>    GL_OES_texture_border_clamp                          DONE (all drivers)
> -  GL_OES_texture_buffer                                not started (based on GL_ARB_texture_buffer_object, GL_ARB_texture_buffer_range, and GL_ARB_texture_buffer_object_rgb32 that are all done)
> +  GL_OES_texture_buffer                                DONE ()
>    GL_OES_texture_cube_map_array                        not started (based on GL_ARB_texture_cube_map_array, which is done for all drivers)
>    GL_OES_texture_stencil8                              DONE (all drivers that support GL_ARB_texture_stencil8)
>    GL_OES_texture_storage_multisample_2d_array          DONE (all drivers that support GL_ARB_texture_multisample)
> diff --git a/src/mapi/glapi/gen/apiexec.py b/src/mapi/glapi/gen/apiexec.py
> index 2a80432..b4f4cf6 100644
> --- a/src/mapi/glapi/gen/apiexec.py
> +++ b/src/mapi/glapi/gen/apiexec.py
> @@ -68,7 +68,7 @@ class exec_info():
>  functions = {
>      # OpenGL 3.1 / GL_ARB_texture_buffer_object.  Mesa only exposes this
>      # extension with core profile.
> -    "TexBuffer": exec_info(core=31),
> +    "TexBuffer": exec_info(core=31, es2=31),
>
>      # OpenGL 3.2 / GL_OES_geometry_shader.
>      "FramebufferTexture": exec_info(core=32, es2=31),
> @@ -146,7 +146,7 @@ functions = {
>
>      # OpenGL 4.3 / GL_ARB_texture_buffer_range.  Mesa can expose the extension
>      # with OpenGL 3.1.
> -    "TexBufferRange": exec_info(core=31),
> +    "TexBufferRange": exec_info(core=31, es2=31),
>
>      # OpenGL 4.3 / GL_ARB_framebuffer_no_attachments.  Mesa can expose the
>      # extension with OpenGL 3.0.
> diff --git a/src/mapi/glapi/gen/es_EXT.xml b/src/mapi/glapi/gen/es_EXT.xml
> index 2b83a97..ee8e9e5 100644
> --- a/src/mapi/glapi/gen/es_EXT.xml
> +++ b/src/mapi/glapi/gen/es_EXT.xml
> @@ -853,6 +853,24 @@
>
>  </category>
>
> +<category name="GL_EXT_texture_buffer" number="183">
> +
> +    <function name="TexBufferEXT" es2="3.1" alias="TexBuffer">
> +        <param name="target" type="GLenum"/>
> +        <param name="internalFormat" type="GLenum"/>
> +        <param name="buffer" type="GLuint"/>
> +    </function>
> +
> +    <function name="TexBufferRangeEXT" es2="3.1" alias="TexBufferRange">
> +        <param name="target" type="GLenum"/>
> +        <param name="internalformat" type="GLenum"/>
> +        <param name="buffer" type="GLuint"/>
> +        <param name="offset" type="GLintptr"/>
> +        <param name="size" type="GLsizeiptr"/>
> +    </function>
> +
> +</category>
> +
>  <category name="GL_EXT_draw_elements_base_vertex" number="204">
>
>      <function name="DrawElementsBaseVertexEXT" alias="DrawElementsBaseVertex"
> @@ -919,6 +937,24 @@
>
>  </category>
>
> +<category name="GL_OES_texture_buffer" number="216">
> +
> +    <function name="TexBufferOES" es2="3.1" alias="TexBuffer">
> +        <param name="target" type="GLenum"/>
> +        <param name="internalFormat" type="GLenum"/>
> +        <param name="buffer" type="GLuint"/>
> +    </function>
> +
> +    <function name="TexBufferRangeOES" es2="3.1" alias="TexBufferRange">
> +        <param name="target" type="GLenum"/>
> +        <param name="internalformat" type="GLenum"/>
> +        <param name="buffer" type="GLuint"/>
> +        <param name="offset" type="GLintptr"/>
> +        <param name="size" type="GLsizeiptr"/>
> +    </function>
> +
> +</category>
> +
>  <category name="GL_OES_draw_elements_base_vertex" number="219">
>
>      <function name="DrawElementsBaseVertexOES" alias="DrawElementsBaseVertex"
> diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c
> index 9aec425..731b62e 100644
> --- a/src/mesa/main/bufferobj.c
> +++ b/src/mesa/main/bufferobj.c
> @@ -148,8 +148,8 @@ get_buffer_target(struct gl_context *ctx, GLenum target)
>        }
>        break;
>     case GL_TEXTURE_BUFFER:
> -      if (ctx->API == API_OPENGL_CORE &&
> -          ctx->Extensions.ARB_texture_buffer_object) {
> +      if (_mesa_has_ARB_texture_buffer_object(ctx) ||
> +          _mesa_has_OES_texture_buffer(ctx)) {
>           return &ctx->Texture.BufferObject;
>        }
>        break;
> diff --git a/src/mesa/main/get.c b/src/mesa/main/get.c
> index 1cbd692..6e04083 100644
> --- a/src/mesa/main/get.c
> +++ b/src/mesa/main/get.c
> @@ -1903,8 +1903,8 @@ tex_binding_to_index(const struct gl_context *ctx, GLenum binding)
>           || _mesa_is_gles3(ctx)
>           ? TEXTURE_2D_ARRAY_INDEX : -1;
>     case GL_TEXTURE_BINDING_BUFFER:
> -      return ctx->API == API_OPENGL_CORE &&
> -             ctx->Extensions.ARB_texture_buffer_object ?
> +      return (_mesa_has_ARB_texture_buffer_object(ctx) ||
> +              _mesa_has_OES_texture_buffer(ctx)) ?
>               TEXTURE_BUFFER_INDEX : -1;
>     case GL_TEXTURE_BINDING_CUBE_MAP_ARRAY:
>        return _mesa_is_desktop_gl(ctx) && ctx->Extensions.ARB_texture_cube_map_array
> diff --git a/src/mesa/main/get_hash_params.py b/src/mesa/main/get_hash_params.py
> index 0142285..d91e241 100644
> --- a/src/mesa/main/get_hash_params.py
> +++ b/src/mesa/main/get_hash_params.py
> @@ -538,6 +538,16 @@ descriptor=[
>
>  # GL_ARB_gpu_shader5 / GL_OES_geometry_shader
>    [ "MAX_GEOMETRY_SHADER_INVOCATIONS", "CONST(MAX_GEOMETRY_SHADER_INVOCATIONS), extra_ARB_gpu_shader5_or_oes_geometry_shader" ],
> +
> +# GL_ARB_texture_buffer_object / GL_OES_texture_buffer
> +  [ "MAX_TEXTURE_BUFFER_SIZE_ARB", "CONTEXT_INT(Const.MaxTextureBufferSize), extra_texture_buffer_object" ],
> +  [ "TEXTURE_BINDING_BUFFER_ARB", "LOC_CUSTOM, TYPE_INT, 0, extra_texture_buffer_object" ],
> +  [ "TEXTURE_BUFFER_DATA_STORE_BINDING_ARB", "LOC_CUSTOM, TYPE_INT, TEXTURE_BUFFER_INDEX, extra_texture_buffer_object" ],
> +  [ "TEXTURE_BUFFER_FORMAT_ARB", "LOC_CUSTOM, TYPE_INT, 0, extra_texture_buffer_object" ],
> +  [ "TEXTURE_BUFFER_ARB", "LOC_CUSTOM, TYPE_INT, 0, extra_texture_buffer_object" ],
> +
> +# GL_ARB_texture_buffer_range
> +  [ "TEXTURE_BUFFER_OFFSET_ALIGNMENT", "CONTEXT_INT(Const.TextureBufferOffsetAlignment), extra_ARB_texture_buffer_range" ],
>  ]},
>
>  # Remaining enums are only in OpenGL
> @@ -807,13 +817,6 @@ descriptor=[
>  # GL_ARB_color_buffer_float
>    [ "RGBA_FLOAT_MODE_ARB", "BUFFER_FIELD(Visual.floatMode, TYPE_BOOLEAN), extra_core_ARB_color_buffer_float_and_new_buffers" ],
>
> -# GL_ARB_texture_buffer_object
> -  [ "MAX_TEXTURE_BUFFER_SIZE_ARB", "CONTEXT_INT(Const.MaxTextureBufferSize), extra_texture_buffer_object" ],
> -  [ "TEXTURE_BINDING_BUFFER_ARB", "LOC_CUSTOM, TYPE_INT, 0, extra_texture_buffer_object" ],
> -  [ "TEXTURE_BUFFER_DATA_STORE_BINDING_ARB", "LOC_CUSTOM, TYPE_INT, TEXTURE_BUFFER_INDEX, extra_texture_buffer_object" ],
> -  [ "TEXTURE_BUFFER_FORMAT_ARB", "LOC_CUSTOM, TYPE_INT, 0, extra_texture_buffer_object" ],
> -  [ "TEXTURE_BUFFER_ARB", "LOC_CUSTOM, TYPE_INT, 0, extra_texture_buffer_object" ],
> -
>  # GL 3.0
>    [ "CONTEXT_FLAGS", "CONTEXT_INT(Const.ContextFlags), extra_version_30" ],
>
> @@ -874,9 +877,6 @@ descriptor=[
>
>  # Enums restricted to OpenGL Core profile
>  { "apis": ["GL_CORE"], "params": [
> -# GL_ARB_texture_buffer_range
> -  [ "TEXTURE_BUFFER_OFFSET_ALIGNMENT", "CONTEXT_INT(Const.TextureBufferOffsetAlignment), extra_ARB_texture_buffer_range" ],
> -
>  # GL_ARB_viewport_array
>    [ "MAX_VIEWPORTS", "CONTEXT_INT(Const.MaxViewports), extra_ARB_viewport_array" ],
>    [ "VIEWPORT_SUBPIXEL_BITS", "CONTEXT_INT(Const.ViewportSubpixelBits), extra_ARB_viewport_array" ],
> diff --git a/src/mesa/main/tests/dispatch_sanity.cpp b/src/mesa/main/tests/dispatch_sanity.cpp
> index c323766..1a43a66 100644
> --- a/src/mesa/main/tests/dispatch_sanity.cpp
> +++ b/src/mesa/main/tests/dispatch_sanity.cpp
> @@ -2452,6 +2452,10 @@ const struct function gles3_functions_possible[] = {
>     /* GL_OES_sample_shading */
>     { "glMinSampleShadingOES", 30, -1 },
>
> +   /* GL_OES_texture_buffer */
> +   { "glTexBufferOES", 31, -1 },
> +   { "glTexBufferRangeOES", 31, -1 },
> +
>     { NULL, 0, -1 }
>  };
>
> diff --git a/src/mesa/main/teximage.c b/src/mesa/main/teximage.c
> index 8a4c628..e0ede22 100644
> --- a/src/mesa/main/teximage.c
> +++ b/src/mesa/main/teximage.c
> @@ -481,8 +481,8 @@ _mesa_max_texture_levels(struct gl_context *ctx, GLenum target)
>        return ctx->Extensions.ARB_texture_cube_map_array
>           ? ctx->Const.MaxCubeTextureLevels : 0;
>     case GL_TEXTURE_BUFFER:
> -      return ctx->API == API_OPENGL_CORE &&
> -             ctx->Extensions.ARB_texture_buffer_object ? 1 : 0;
> +      return (_mesa_has_ARB_texture_buffer_object(ctx) ||
> +              _mesa_has_OES_texture_buffer(ctx)) ? 1 : 0;
>     case GL_TEXTURE_2D_MULTISAMPLE:
>     case GL_PROXY_TEXTURE_2D_MULTISAMPLE:
>     case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
> @@ -4671,7 +4671,7 @@ _mesa_CompressedTextureSubImage3D(GLuint texture, GLint level, GLint xoffset,
>  static mesa_format
>  get_texbuffer_format(const struct gl_context *ctx, GLenum internalFormat)
>  {
> -   if (ctx->API != API_OPENGL_CORE) {
> +   if (ctx->API == API_OPENGL_COMPAT) {
>        switch (internalFormat) {
>        case GL_ALPHA8:
>           return MESA_FORMAT_A_UNORM8;
> @@ -4758,8 +4758,8 @@ get_texbuffer_format(const struct gl_context *ctx, GLenum internalFormat)
>        }
>     }
>
> -   if (ctx->API == API_OPENGL_CORE &&
> -       ctx->Extensions.ARB_texture_buffer_object_rgb32) {
> +   if (_mesa_has_ARB_texture_buffer_object_rgb32(ctx) ||
> +       _mesa_has_OES_texture_buffer(ctx)) {
>        switch (internalFormat) {
>        case GL_RGB32F:
>           return MESA_FORMAT_RGB_FLOAT32;
> @@ -4776,6 +4776,8 @@ get_texbuffer_format(const struct gl_context *ctx, GLenum internalFormat)
>     case GL_RGBA8:
>        return MESA_FORMAT_R8G8B8A8_UNORM;
>     case GL_RGBA16:
> +      if (_mesa_is_gles(ctx))
> +         return MESA_FORMAT_NONE;
>        return MESA_FORMAT_RGBA_UNORM16;
>     case GL_RGBA16F_ARB:
>        return MESA_FORMAT_RGBA_FLOAT16;
> @@ -4797,6 +4799,8 @@ get_texbuffer_format(const struct gl_context *ctx, GLenum internalFormat)
>     case GL_RG8:
>        return MESA_FORMAT_R8G8_UNORM;
>     case GL_RG16:
> +      if (_mesa_is_gles(ctx))
> +         return MESA_FORMAT_NONE;
>        return MESA_FORMAT_R16G16_UNORM;
>     case GL_RG16F:
>        return MESA_FORMAT_RG_FLOAT16;
> @@ -4818,6 +4822,8 @@ get_texbuffer_format(const struct gl_context *ctx, GLenum internalFormat)
>     case GL_R8:
>        return MESA_FORMAT_R_UNORM8;
>     case GL_R16:
> +      if (_mesa_is_gles(ctx))
> +         return MESA_FORMAT_NONE;
>        return MESA_FORMAT_R_UNORM16;
>     case GL_R16F:
>        return MESA_FORMAT_R_FLOAT16;
> @@ -4895,8 +4901,8 @@ _mesa_texture_buffer_range(struct gl_context *ctx,
>     /* NOTE: ARB_texture_buffer_object has interactions with
>      * the compatibility profile that are not implemented.
>      */
> -   if (!(ctx->API == API_OPENGL_CORE &&
> -         ctx->Extensions.ARB_texture_buffer_object)) {
> +   if (!_mesa_has_ARB_texture_buffer_object(ctx) &&
> +       !_mesa_has_OES_texture_buffer(ctx)) {
>        _mesa_error(ctx, GL_INVALID_OPERATION,
>                    "%s(ARB_texture_buffer_object is not"
>                    " implemented for the compatibility profile)", caller);
> diff --git a/src/mesa/main/texobj.c b/src/mesa/main/texobj.c
> index d8407f0..c9502bd 100644
> --- a/src/mesa/main/texobj.c
> +++ b/src/mesa/main/texobj.c
> @@ -204,8 +204,8 @@ _mesa_get_current_tex_object(struct gl_context *ctx, GLenum target)
>        case GL_PROXY_TEXTURE_2D_ARRAY_EXT:
>           return arrayTex ? ctx->Texture.ProxyTex[TEXTURE_2D_ARRAY_INDEX] : NULL;
>        case GL_TEXTURE_BUFFER:
> -         return ctx->API == API_OPENGL_CORE &&
> -                ctx->Extensions.ARB_texture_buffer_object ?
> +         return (_mesa_has_ARB_texture_buffer_object(ctx) ||
> +                 _mesa_has_OES_texture_buffer(ctx)) ?
>                  texUnit->CurrentTex[TEXTURE_BUFFER_INDEX] : NULL;
>        case GL_TEXTURE_EXTERNAL_OES:
>           return _mesa_is_gles(ctx) && ctx->Extensions.OES_EGL_image_external
> @@ -1574,8 +1574,8 @@ _mesa_tex_target_to_index(const struct gl_context *ctx, GLenum target)
>           || _mesa_is_gles3(ctx)
>           ? TEXTURE_2D_ARRAY_INDEX : -1;
>     case GL_TEXTURE_BUFFER:
> -      return ctx->API == API_OPENGL_CORE &&
> -             ctx->Extensions.ARB_texture_buffer_object ?
> +      return (_mesa_has_ARB_texture_buffer_object(ctx) ||
> +              _mesa_has_OES_texture_buffer(ctx)) ?
>               TEXTURE_BUFFER_INDEX : -1;
>     case GL_TEXTURE_EXTERNAL_OES:
>        return _mesa_is_gles(ctx) && ctx->Extensions.OES_EGL_image_external
> diff --git a/src/mesa/main/texparam.c b/src/mesa/main/texparam.c
> index 9d94636..0c3429f 100644
> --- a/src/mesa/main/texparam.c
> +++ b/src/mesa/main/texparam.c
> @@ -1223,6 +1223,26 @@ legal_get_tex_level_parameter_target(struct gl_context *ctx, GLenum target,
>     case GL_TEXTURE_2D_MULTISAMPLE:
>     case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
>        return ctx->Extensions.ARB_texture_multisample;
> +   case GL_TEXTURE_BUFFER:
> +      /* GetTexLevelParameter accepts GL_TEXTURE_BUFFER in GL 3.1+ contexts,
> +       * but not in earlier versions that expose ARB_texture_buffer_object.
> +       *
> +       * From the ARB_texture_buffer_object spec:
> +       * "(7) Do buffer textures support texture parameters (TexParameter) or
> +       *      queries (GetTexParameter, GetTexLevelParameter, GetTexImage)?
> +       *
> +       *    RESOLVED:  No. [...] Note that the spec edits above don't add
> +       *    explicit error language for any of these cases.  That is because
> +       *    each of the functions enumerate the set of valid <target>
> +       *    parameters.  Not editing the spec to allow TEXTURE_BUFFER_ARB in
> +       *    these cases means that target is not legal, and an INVALID_ENUM
> +       *    error should be generated."
> +       *
> +       * From the OpenGL 3.1 spec:
> +       * "target may also be TEXTURE_BUFFER, indicating the texture buffer."
> +       */
> +      return _mesa_has_ARB_texture_buffer_object(ctx) ||

Er oops, I meant to undo this change -- this should be

      return (ctx->API == API_OPENGL_CORE && ctx->Version >= 31) ||
         _mesa_has_OES_texture_buffer(ctx);


> +         _mesa_has_OES_texture_buffer(ctx);
>     }
>
>     if (!_mesa_is_desktop_gl(ctx))
> @@ -1247,25 +1267,6 @@ legal_get_tex_level_parameter_target(struct gl_context *ctx, GLenum target,
>     case GL_PROXY_TEXTURE_1D_ARRAY_EXT:
>     case GL_PROXY_TEXTURE_2D_ARRAY_EXT:
>        return ctx->Extensions.EXT_texture_array;
> -   case GL_TEXTURE_BUFFER:
> -      /* GetTexLevelParameter accepts GL_TEXTURE_BUFFER in GL 3.1+ contexts,
> -       * but not in earlier versions that expose ARB_texture_buffer_object.
> -       *
> -       * From the ARB_texture_buffer_object spec:
> -       * "(7) Do buffer textures support texture parameters (TexParameter) or
> -       *      queries (GetTexParameter, GetTexLevelParameter, GetTexImage)?
> -       *
> -       *    RESOLVED:  No. [...] Note that the spec edits above don't add
> -       *    explicit error language for any of these cases.  That is because
> -       *    each of the functions enumerate the set of valid <target>
> -       *    parameters.  Not editing the spec to allow TEXTURE_BUFFER_ARB in
> -       *    these cases means that target is not legal, and an INVALID_ENUM
> -       *    error should be generated."
> -       *
> -       * From the OpenGL 3.1 spec:
> -       * "target may also be TEXTURE_BUFFER, indicating the texture buffer."
> -       */
> -      return ctx->API == API_OPENGL_CORE && ctx->Version >= 31;
>     case GL_PROXY_TEXTURE_2D_MULTISAMPLE:
>     case GL_PROXY_TEXTURE_2D_MULTISAMPLE_ARRAY:
>        return ctx->Extensions.ARB_texture_multisample;
> --
> 2.4.10
>


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