diff options
| -rw-r--r-- | src/mesa/main/bufferobj.c | 142 | ||||
| -rw-r--r-- | src/mesa/main/mtypes.h | 7 |
2 files changed, 149 insertions, 0 deletions
diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c index ee920a98b0..27638caf9f 100644 --- a/src/mesa/main/bufferobj.c +++ b/src/mesa/main/bufferobj.c @@ -3034,6 +3034,33 @@ set_ubo_binding(struct gl_context *ctx, } /** + * Binds a buffer object to a shader storage buffer binding point. + * + * The caller is responsible for flushing vertices and updating + * NewDriverState. + */ +static void +set_ssbo_binding(struct gl_context *ctx, + struct gl_shader_storage_buffer_binding *binding, + struct gl_buffer_object *bufObj, + GLintptr offset, + GLsizeiptr size, + GLboolean autoSize) +{ + _mesa_reference_buffer_object(ctx, &binding->BufferObject, bufObj); + + binding->Offset = offset; + binding->Size = size; + binding->AutomaticSize = autoSize; + + /* If this is a real buffer object, mark it has having been used + * at some point as a SSBO. + */ + if (size >= 0) + bufObj->UsageHistory |= USAGE_SHADER_STORAGE_BUFFER; +} + +/** * Binds a buffer object to a uniform buffer binding point. * * Unlike set_ubo_binding(), this function also flushes vertices @@ -3254,6 +3281,35 @@ error_check_bind_uniform_buffers(struct gl_context *ctx, return true; } +static bool +error_check_bind_shader_storage_buffers(struct gl_context *ctx, + GLuint first, GLsizei count, + const char *caller) +{ + if (!ctx->Extensions.ARB_shader_storage_buffer_object) { + _mesa_error(ctx, GL_INVALID_ENUM, + "%s(target=GL_SHADER_STORAGE_BUFFER)", caller); + return false; + } + + /* The ARB_multi_bind_spec says: + * + * "An INVALID_OPERATION error is generated if <first> + <count> is + * greater than the number of target-specific indexed binding points, + * as described in section 6.7.1." + */ + if (first + count > ctx->Const.MaxShaderStorageBufferBindings) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "%s(first=%u + count=%d > the value of " + "GL_MAX_SHADER_STORAGE_BUFFER_BINDINGS=%u)", + caller, first, count, + ctx->Const.MaxShaderStorageBufferBindings); + return false; + } + + return true; +} + /** * Unbind all uniform buffers in the range * <first> through <first>+<count>-1 @@ -3269,6 +3325,22 @@ unbind_uniform_buffers(struct gl_context *ctx, GLuint first, GLsizei count) bufObj, -1, -1, GL_TRUE); } +/** + * Unbind all shader storage buffers in the range + * <first> through <first>+<count>-1 + */ +static void +unbind_shader_storage_buffers(struct gl_context *ctx, GLuint first, + GLsizei count) +{ + struct gl_buffer_object *bufObj = ctx->Shared->NullBufferObj; + GLint i; + + for (i = 0; i < count; i++) + set_ssbo_binding(ctx, &ctx->ShaderStorageBufferBindings[first + i], + bufObj, -1, -1, GL_TRUE); +} + static void bind_uniform_buffers_base(struct gl_context *ctx, GLuint first, GLsizei count, const GLuint *buffers) @@ -3336,6 +3408,73 @@ bind_uniform_buffers_base(struct gl_context *ctx, GLuint first, GLsizei count, } static void +bind_shader_storage_buffers_base(struct gl_context *ctx, GLuint first, + GLsizei count, const GLuint *buffers) +{ + GLint i; + + if (!error_check_bind_shader_storage_buffers(ctx, first, count, + "glBindBuffersBase")) + return; + + /* Assume that at least one binding will be changed */ + FLUSH_VERTICES(ctx, 0); + ctx->NewDriverState |= ctx->DriverFlags.NewShaderStorageBuffer; + + if (!buffers) { + /* The ARB_multi_bind spec says: + * + * "If <buffers> is NULL, all bindings from <first> through + * <first>+<count>-1 are reset to their unbound (zero) state." + */ + unbind_shader_storage_buffers(ctx, first, count); + return; + } + + /* Note that the error semantics for multi-bind commands differ from + * those of other GL commands. + * + * The Issues section in the ARB_multi_bind spec says: + * + * "(11) Typically, OpenGL specifies that if an error is generated by a + * command, that command has no effect. This is somewhat + * unfortunate for multi-bind commands, because it would require a + * first pass to scan the entire list of bound objects for errors + * and then a second pass to actually perform the bindings. + * Should we have different error semantics? + * + * RESOLVED: Yes. In this specification, when the parameters for + * one of the <count> binding points are invalid, that binding point + * is not updated and an error will be generated. However, other + * binding points in the same command will be updated if their + * parameters are valid and no other error occurs." + */ + + _mesa_begin_bufferobj_lookups(ctx); + + for (i = 0; i < count; i++) { + struct gl_shader_storage_buffer_binding *binding = + &ctx->ShaderStorageBufferBindings[first + i]; + struct gl_buffer_object *bufObj; + + if (binding->BufferObject && binding->BufferObject->Name == buffers[i]) + bufObj = binding->BufferObject; + else + bufObj = _mesa_multi_bind_lookup_bufferobj(ctx, buffers, i, + "glBindBuffersBase"); + + if (bufObj) { + if (bufObj == ctx->Shared->NullBufferObj) + set_ssbo_binding(ctx, binding, bufObj, -1, -1, GL_TRUE); + else + set_ssbo_binding(ctx, binding, bufObj, 0, 0, GL_TRUE); + } + } + + _mesa_end_bufferobj_lookups(ctx); +} + +static void bind_uniform_buffers_range(struct gl_context *ctx, GLuint first, GLsizei count, const GLuint *buffers, const GLintptr *offsets, const GLsizeiptr *sizes) @@ -4043,6 +4182,9 @@ _mesa_BindBuffersBase(GLenum target, GLuint first, GLsizei count, case GL_UNIFORM_BUFFER: bind_uniform_buffers_base(ctx, first, count, buffers); return; + case GL_SHADER_STORAGE_BUFFER: + bind_shader_storage_buffers_base(ctx, first, count, buffers); + return; case GL_ATOMIC_COUNTER_BUFFER: bind_atomic_buffers_base(ctx, first, count, buffers); return; diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h index 8a4ad766d0..4b0a995aec 100644 --- a/src/mesa/main/mtypes.h +++ b/src/mesa/main/mtypes.h @@ -1459,6 +1459,7 @@ typedef enum { USAGE_UNIFORM_BUFFER = 0x1, USAGE_TEXTURE_BUFFER = 0x2, USAGE_ATOMIC_COUNTER_BUFFER = 0x4, + USAGE_SHADER_STORAGE_BUFFER = 0x8, } gl_buffer_usage; @@ -4034,6 +4035,12 @@ struct gl_driver_flags */ uint64_t NewUniformBuffer; + /** + * gl_context::ShaderStorageBufferBindings + * gl_shader_program::ShaderStorageBlocks + */ + uint64_t NewShaderStorageBuffer; + uint64_t NewTextureBuffer; /** |