+ return fb->_AllColorBuffersFixedPoint;
+}
+
+GLboolean
+_mesa_get_clamp_fragment_color(const struct gl_context *ctx)
+{
+ return get_clamp_color(ctx->DrawBuffer,
+ ctx->Color.ClampFragmentColor);
+}
+
+GLboolean
+_mesa_get_clamp_vertex_color(const struct gl_context *ctx)
+{
+ return get_clamp_color(ctx->DrawBuffer, ctx->Light.ClampVertexColor);
+}
+
+GLboolean
+_mesa_get_clamp_read_color(const struct gl_context *ctx)
+{
+ return get_clamp_color(ctx->ReadBuffer, ctx->Color.ClampReadColor);
+}
+
+/**
+ * Update the ctx->Color._ClampFragmentColor field
+ */
+void
+_mesa_update_clamp_fragment_color(struct gl_context *ctx)
+{
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+
+ /* Don't clamp if:
+ * - there is no colorbuffer
+ * - all colorbuffers are unsigned normalized, so clamping has no effect
+ * - there is an integer colorbuffer
+ */
+ if (!fb || !fb->_HasSNormOrFloatColorBuffer || fb->_IntegerColor)
+ ctx->Color._ClampFragmentColor = GL_FALSE;
+ else
+ ctx->Color._ClampFragmentColor = _mesa_get_clamp_fragment_color(ctx);
+}
+
+/**
+ * Update the ctx->Color._ClampVertexColor field
+ */
+void
+_mesa_update_clamp_vertex_color(struct gl_context *ctx)
+{
+ ctx->Light._ClampVertexColor = _mesa_get_clamp_vertex_color(ctx);
+}
+
+/**
+ * Returns an appropriate mesa_format for color rendering based on the
+ * GL_FRAMEBUFFER_SRGB state.
+ *
+ * Some drivers implement GL_FRAMEBUFFER_SRGB using a flag on the blend state
+ * (which GL_FRAMEBUFFER_SRGB maps to reasonably), but some have to do so by
+ * overriding the format of the surface. This is a helper for doing the
+ * surface format override variant.
+ */
+mesa_format
+_mesa_get_render_format(const struct gl_context *ctx, mesa_format format)
+{
+ if (ctx->Color.sRGBEnabled)
+ return format;
+ else
+ return _mesa_get_srgb_format_linear(format);
+}